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POZ. 1. BELKA PREFABRYKOWANA STROPU DZ-4 |
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1.1. Zestawienie obciążeń |
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1.1.1. Obciążenia stałe |
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płytki gresowe |
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gładź cementowa 3cm |
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styropian 4cm |
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strop DZ-4 |
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tynk c-w 1,5cm |
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WARSTWY |
gk [kN/m2] |
gf>1 |
go1 [kN/m2] |
gf<1 |
go2 [kN/m2] |
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- płytki gresowe |
0,180 |
1,2 |
0,216 |
0,9 |
0,162 |
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- gładź cementowa 3cm 0,03x21 |
0,630 |
1,3 |
0,819 |
0,8 |
0,504 |
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- styropian 4cm 0,04x0,45 |
0,018 |
1,2 |
0,022 |
0,9 |
0,016 |
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- strop DZ-4 o wys.27cm |
2,960 |
1,1 |
3,256 |
0,9 |
2,664 |
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- tynk c-w 1,5cm 0,015x19 |
0,285 |
1,3 |
0,371 |
0,8 |
0,228 |
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S= |
4,07 |
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4,68 |
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3,57 |
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1.1.2. Obciążenia zmienne |
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gf |
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Obciążenie zmienne |
pk [kN/m2]= |
2,00 |
1,2 |
po [kN/m2]= |
2,40 |
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Długotrwała część obc. zmiennego |
pdk [kN/m2]= |
1,60 |
1,2 |
pdo [kN/m2]= |
1,92 |
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lS= |
0,60 |
m |
Osiowy rozstaw żeber stropu DZ-4 |
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1.1.3. Obciążenia całkowite |
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qk = |
gk + pk |
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qk = |
(4,07 + 2,00) kN/m2 = |
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6,07 |
kN/m2 |
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qo1 = |
go1 + po |
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qo1 = |
(4,68 + 2,40) kN/m2 = |
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7,08 |
kN/m2 |
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qo2 = |
go2 + po |
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qo2 = |
(3,57 + 2,40) kN/m2 = |
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5,97 |
kN/m2 |
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1.1.4. Obciążenia długotrwałe |
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qdk= |
gk + pdk |
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qdk= |
(4,07 + 1,6) kN/m2 = |
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5,67 |
kN/m2 |
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qdo1= |
go1 + pdo |
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qdo1= |
(4,68 + 1,92) kN/m2 = |
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6,60 |
kN/m2 |
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1.1.5. Obciążenie żebra |
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gk= |
4,07*0,60 = |
2,44 |
kN/mb |
pdo= |
1,92*0,60 = |
1,15 |
kN/mb |
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go1= |
4,68*0,60 = |
2,81 |
kN/mb |
qk= |
6,07*0,60 = |
3,64 |
kN/mb |
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go2= |
3,57*0,60 = |
2,14 |
kN/mb |
qo1= |
7,08*0,60 = |
4,25 |
kN/mb |
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pk= |
2,00*0,60 = |
1,20 |
kN/mb |
qo2= |
5,97*0,60 = |
3,58 |
kN/mb |
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po= |
2,40*0,60 = |
1,44 |
kN/mb |
qdk= |
5,67*0,60 = |
3,40 |
kN/mb |
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pdk= |
1,60*0,60 = |
0,96 |
kN/mb |
qko1= |
6,60*0,60 = |
3,96 |
kN/mb |
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1.2. Schemat statyczny i rozpiętości obliczeniowe |
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Obciążenie stałe |
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go1= |
2,81 |
kN/mb |
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Obciążenie zmienne |
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po= |
1,44 |
kN/mb |
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Rozpiętości w osiach podpór l1=6,35m i l2=6,60m >4,5m ,zatem przewiduje się podparcie stropu w czasie montażu. |
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Strop pracuje tylko w fazie II |
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Na podstawie "Poradnika Inżyniera i technika budowlanego" traktuję żebro jako belkę wolnopodpartą, |
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częściowo zamocowaną na podciągu i swobodnie opartą na ścianie zewnętrznej. |
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1.2.1. Schemat statyczny żebra |
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1.2.2. Rozpiętości obliczeniowe |
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leff=ln+a1+a2 |
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Przyjęto oparcie na ścianie o szerokości wieńca 0,26m ,a przyjeta szerokość podciągu wynosi 0,20m |
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a) dla przęseł 1-2 i 3-4 |
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ln = 6,35-0,5x0,2 = |
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6,25 |
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t1=0,26m ;t2=0,2m ;h=0,27m |
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Wg rys.6a PN --->1/3 t1=0,087m< a1 <1/2 t1=0,13m oraz a1<1/2h=0,138m ---> a1= |
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0,13 |
m |
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Wg rys.6c PN --->a1<1/2 t1=0,13m oraz a1<1/2 h=0,138m ---> a1 = |
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0,13 |
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Wg rys.6b PN --->a2 =1/2t2= |
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0,10 |
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l1-2 = l2-3 = 6,25+0,13+0,10= |
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6,48 |
m |
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b) dla przęsła 2-3 |
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Wg rys.6b PN teoretyczne punkty podparcia znajdują się w osiach podpór ,zatem leff |
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równa jest osiowemu rozstawowi podpór. |
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l2-3 = |
6,60 |
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1.3. Obliczenie sił wewnętrznych |
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Maksymalne momenty i siły poprzeczne dla przęseł 1-2 i 3-4 |
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- w przęśle 1-2 i 3-4 |
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17,85 |
kNm |
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- w przęśle 1-2 i 3-4 dla długotrwałego obciążenia charakterystycznego |
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14,29 |
kNm |
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- moment utwierdzenia 2 i 3 |
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-11,15 |
kNm |
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- siły poprzeczne |
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12,05 |
kN |
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-15,49 |
kN |
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Maksymalne momenty i siły poprzeczne dla przęsła 2-3 |
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- w przęśle 2-3 |
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15,43 |
kNm |
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- w przęśle 1-2 i 3-4 dla długotrwałego obciążenia charakterystycznego |
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12,36 |
kNm |
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- moment utwierdzenia 2 i 3 |
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-11,57 |
kNm |
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- siły poprzeczne |
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14,02 |
kN |
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1.4. Wymiarowanie zbrojenia dla żeber skrajnych |
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Materiały: |
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Beton: B 20 |
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fcd= |
10,6 |
MPa |
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EC= |
27,5x10^-3 |
kN/mm2 |
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Stal A III (34GS) |
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fyd= |
350 |
MPa |
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Es= |
200 |
kN/mm2 |
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Rozpietość modularna stropu: |
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lm= |
6,60 |
m |
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Rozpietość stropu w swietle podpór: |
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ln= |
6,35-0,5x0,2= |
6,25 |
m |
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Rozpietość efektywna przęsła: |
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leff= |
6,48 |
m |
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1.4.1. Schemat belki |
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1.4.2. Przekrój zastępczy i efektywna szerokość współpracująca |
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bw= |
110,0 |
mm |
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b= |
600,0 |
mm |
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h= |
270,0 |
mm |
wysokość stropu łącznie z nadbetonem |
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d= |
240,0 |
mm |
wysokośc użyteczna stropu |
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1212 |
mm=1,21m>0,60m |
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beff= |
600,0 |
mm |
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1.4.3. Nośność przekroju w przęśle na zginanie |
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1.4.3.1. Sprawdzenie typu przekroju |
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d= |
240 |
mm |
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hf= |
30 |
mm |
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Msd= |
17,85 |
kNm = |
17845332 |
Nmm |
beff= |
470 |
mm |
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fcd= |
10,60 |
N/mm2 |
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a= |
0,85 |
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Nmm = |
28,58 |
kNm |
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Msd= |
17,85 |
kNm < Mhf = |
28,58 |
kNm Przekrój pozornie teowy. |
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1.4.3.2 Obliczenie nośności w przęśle |
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Msd= |
17,85 |
kNm |
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beff= |
470 |
mm |
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0,073 |
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fcd= |
10,60 |
N/mm2 |
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a= |
0,85 |
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Stąd |
|
0,076 |
< xeff,lim = |
0,530 |
d= |
240 |
mm |
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fyd= |
350 |
N/mm2 |
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Stal klasy III ---> fyd = |
350 |
N/mm2 |
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z=sb/xeff = 0,073/0,076 = |
0,962 |
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220,8 |
mm2 |
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Przyjęto typowe zbrojenie belek DZ-4: 2#12+1#10 o As1= |
304,0 |
mm2(34GS) |
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Górą pręt montażowy 1f 8,0 (St0S) (wg Kobiaka). |
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1.4.4. Nośność przekroju przy podporze na zginanie |
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Msd= |
-11,15 |
kNm |
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0,006 |
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bw= |
110,0 |
mm |
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fcd= |
10,6 |
N/mm2 |
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< xeff,lim = |
0,530 |
a= |
0,85 |
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z=sb/xeff = 0,006/0,006 = |
0,997 |
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d= |
240,0 |
mm |
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fyd= |
350,0 |
N/mm2 |
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133,2 |
mm2 |
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Przyjęto zbrojenie 1f16 o As1= |
201,0 |
mm2(34GS) |
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1.4.5. Zbrojenie na ścinanie |
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leff= |
6,48 |
m |
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Vsd1= |
12,05 |
kN |
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a1= |
0,13 |
m |
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Vsd2= |
-15,49 |
kN |
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a2= |
0,10 |
m |
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q0= |
4,25 |
kN/m |
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kN |
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-15,07 |
kN |
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Nośność przekroju bez zbrojenia VRd1 |
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d= |
0,24 |
m |
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B20-->trd= |
0,22 |
N/mm2 |
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AsL= |
201,0 |
mm2 |
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bw= |
110,0 |
mm |
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0,008 |
< 0,02 |
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d= |
240,0 |
mm |
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VRd1= |
16,64 |
kN>Vsd2kr= |
15,07 |
kN |
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Żebro nie wymaga zbrojenia na ścinanie |
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n= |
0,7-fck/200 = |
0,62 |
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B20 Stąd fck= |
16,0 |
N/mm2 |
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z=0,9d= |
216,0 |
mm |
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bw= |
110,0 |
mm |
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d= |
240,0 |
mm |
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fcd= |
10,6 |
N/mm2 |
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Q= |
45 |
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78075 |
N = |
78,08 |
kN |
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1.5. Sprawdzenie stanu granicznego użytkowalności |
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1.5.1. Sprawdzenie zarysowania |
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As = |
304,0 |
mm2 |
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1,15 |
% |
bw = |
110,0 |
mm |
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d= |
240,0 |
mm |
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Msd,dk = |
14,29 |
kNm |
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z = |
0,8 |
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24,49 |
kN/cm2 = |
245 |
MPa |
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0,85 < |
d/h=24/27= |
0,89 |
< 0,95 |
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Szerokość rys prostopadłych jest ograniczona do wlim=0,3mm ,gdy fmax=32mm (wg tab.D.1 PN-B-03264) |
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f =12mm < fmax=32mm |
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1.5.2. Sprawdzenie ugięcia |
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leff = |
6,48 |
m |
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19,6 |
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d= |
240,0 |
mm |
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rs = |
1,15 |
% |
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ss = |
245 |
MPa |
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27 |
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20,01 |
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Warunek nie został spełniony. |
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Na podstawie "Konstrukcji Żelbetowych " Kobiaka stosuję trzy żebra rozdzielcze |
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w połowie rozpiętości belki stosując pręty #16 (34GS) |
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Zbrojenie żeber rozdzielczych powinno przenieść siłę min 40kNxli |
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li -rozstaw żeber rozdzielczych |
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li = |
1,07 |
m |
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Fmin=40x1,07= |
42,8 |
kN |
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140,7 |
kN |
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1.6. Wymiarowanie zbrojenia dla żebra środkowego |
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Materiały: |
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Beton: B 20 |
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fcd= |
10,6 |
MPa |
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EC= |
27,5x10^-3 |
kN/mm2 |
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Stal A III (34GS) |
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fyd= |
350 |
MPa |
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Es= |
200 |
kN/mm2 |
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Rozpietość modularna stropu: |
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lm= |
6,60 |
m |
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Rozpietość stropu w swietle podpór: |
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ln=6,60-2x0,5x0,2= |
6,4 |
m |
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a2= |
0,10 |
m |
podparcie na podporze. |
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Rozpietość efektywna przęsła: |
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leff= |
6,60 |
m |
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1.6.1. Schemat belki |
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1.6.2. Przekrój zastępczy i efektywna szerokość współpracująca |
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bw= |
110,0 |
mm |
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b= |
600,0 |
mm |
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h= |
270,0 |
mm |
wysokość stropu łącznie z nadbetonem |
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d= |
240,0 |
mm |
wysokość użyteczna stropu |
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103,4 |
cm=1,03m>0,60m |
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beff= |
600,0 |
mm |
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1.6.3. Nośność przekroju w przęśle na zginanie |
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1.6.3.1. Sprawdzenie typu przekroju |
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d= |
240,0 |
mm |
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hf= |
30,00 |
mm |
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Msd= |
15,43 |
kNm = |
15426992 |
Nmm |
beff= |
470,0 |
mm |
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fcd= |
10,6 |
N/mm2 |
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a= |
0,85 |
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2858,42 |
kNcm = |
28,58 |
kNm |
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Msd= |
15,43 |
kNm < Mhf = |
28,58 |
kNm Przekrój pozornie teowy |
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1.6.3.2 Obliczenie nośności w przęśle |
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Msd= |
15,43 |
kNm |
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0,063 |
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beff= |
470 |
mm |
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fcd= |
10,60 |
N/mm2 |
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< xeff,lim = |
0,530 |
a= |
0,85 |
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d= |
240 |
mm |
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Stal klasy III ---> fyd= |
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350,0 |
N/m2 |
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fyd= |
350 |
N/mm2 |
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z= |
sb/xeff = |
0,967 |
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189,86 |
mm2 |
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Przyjęto typowe zbrojenie belek DZ-4: 2#12+1#10 o As1= |
304,0 |
mm2(34GS) |
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Górą pręt montażowy 1f 8,0 (St0S) (wg Kobiaka) |
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1.6.4. Nośność przekroju przy podporze na zginanie |
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Msd= |
-11,57 |
kNm |
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0,006 |
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bw= |
110 |
mm |
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fcd= |
10,6 |
N/mm2 |
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< xeff,lim = |
0,530 |
a= |
0,85 |
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z= |
sb/xeff = |
0,997 |
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d= |
240 |
mm |
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fyd= |
350 |
N/mm2 |
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138,17 |
mm2 |
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Przyjęto zbrojenie 1f16 o As1= |
201,0 |
mm2(34GS) |
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1.6.5. Zbrojenie na ścinanie |
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q0= |
4,25 |
kN/m |
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leff= |
6,60 |
m |
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a2,3= |
0,10 |
m |
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Vsd2,3= |
14,02 |
kN |
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13,60 |
kN |
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Nośność przekroju bez zbrojenia VRd1 |
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d= |
0,24 |
m |
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AsL= |
201 |
mm2 |
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B20-->trd= |
0,22 |
N/mm2 |
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d= |
240 |
mm |
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bw= |
110 |
mm |
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0,008 |
< 0,02 |
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VRd1= |
16,64 |
kN>Vsd2kr= |
13,60 |
kN |
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Żebro nie wymaga zbrojenia na ścinanie |
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n= |
0,7-fck/200 = |
0,62 |
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B20 Stąd fck= |
16 |
N/mm2 |
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z=0,9d= |
216,0 |
mm |
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bw= |
110 |
mm |
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d= |
240 |
mm |
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fcd= |
10,6 |
N/mm2 |
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Q= |
45 |
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78075 |
N = |
78,08 |
kN |
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Przyjęto typowe strzemiona dwucięte f 4,5 (A-I) w rozstawie co 180mm w przęśle i co 80mm przy podporze |
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1.7. Sprawdzenie stanu granicznego użytkowalności |
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1.7.1. Sprawdzenie zarysowania |
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As = |
304 |
mm2 |
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1,15 |
% |
bw = |
110 |
mm |
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d= |
240 |
mm |
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Msd = |
12,36 |
kNm |
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z = |
0,80 |
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21,17 |
kN/cm2 = |
212 |
MPa |
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0,85 < |
d/h=24/27= |
0,89 |
< 0,95 |
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Szerokość rys prostopadłych jest ograniczona do wlim=0,3mm ,gdy fmax=32mm (wg tab.D.1 PN-B-03264) |
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# =12mm < fmax=32mm |
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1.7.2. Sprawdzenie ugięcia |
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leff = |
6,60 |
m |
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18,5 |
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d= |
240 |
mm |
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rs = |
1,15 |
% |
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ss = |
212 |
MPa |
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27,5 |
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21,85 |
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Warunek nie został spełniony. |
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Na podstawie "Konstrukcji Żelbetowych " Kobiaka stosuję trzy żebra rozdzielcze |
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w połowie rozpiętości belki stosując pręty #16 (34GS) |
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Zbrojenie żeber rozdzielczych powinno przenieść siłę min 40kNxli |
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li -rozstaw żeber rozdzielczych |
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li = |
1,07 |
m |
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Fmin=40x1,07= |
42,8 |
kN |
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140,7 |
kN |
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1.8. Żebro rozdzielcze |
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Zastosowano po trzy żebra rozdzielcze usytuowane w środku rozpiętości przęseł. |
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Przyjęto zbrojenie główne żeber rozdzielczych w postaci 2 prętów o średnicy #16 |
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ze stali A-III (34GS) o As = 4,02cm2 ,strzemiona o średnicy 4,5mm ze stali A-I w rozstawie co 0,6m |
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POZ. 2. BELKA POD ŚCIANKĄ DZIAŁOWĄ |
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Przyjęto żebro szer. b=0,20m i h=0,27m składające się z dwóch żeber typowych stropu |
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i betonu uzupełniającego (wg zaleceń z "Konstrukcje betonowe" Kobiak t.2 rys. 4-26b) |
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2.1. Zestawienie obciążeń |
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2.1.1. Obciążenia stałe |
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WARSTWY |
gk [kN/mb] |
gf>1 |
go1 [kN/mb] |
gf<1 |
go2 [kN/mb] |
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- 1 pas typowy stropu DZ-4 (z poz.1.1.5.) |
2,44 |
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2,81 |
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2,14 |
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- ciężar własny żebra 0,2x0,27x25 |
1,35 |
1,1 |
1,49 |
0,9 |
1,22 |
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- tynk cem.-wap. na żebrze 0,2x0,015x19 |
0,06 |
1,3 |
0,07 |
0,8 |
0,05 |
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- ścianka działowa 12cm (cegła na zaprawie cem.-wap.) 0,12x18x(3,9-0,27) |
7,84 |
1,1 |
8,62 |
0,9 |
7,06 |
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- tynk cem.-wap. na ściance działowej . 2x0,015x19x(3,9-0,27) |
2,07 |
1,3 |
2,69 |
0,8 |
1,66 |
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S= |
13,76 |
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15,68 |
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12,12 |
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2.1.2. Obciążenia zmienne |
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gf |
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Obciążenie zmienne 2,0x(0,6+0,2-0,15) |
pk [kN/mb]= |
1,30 |
1,2 |
po [kN/mb]= |
1,56 |
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Długotrwała część obc. zm. 1,6x(0,6+0,2-0,15) |
pdk [kN/mb]= |
1,04 |
1,2 |
pdo [kN/mb]= |
1,25 |
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2.1.3. Obciążenia całkowite |
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qk = |
gk + pk |
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qk = |
(13,76 + 1,30)kN/m = |
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15,06 |
kN/m |
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qo1 = |
go1 + po |
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qo1 = |
(15,68 + 1,56 )kN/m= |
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17,24 |
kN/m |
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qo2 = |
go2 + po |
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qo2 = |
(12,12 + 1,56 )kN/m= |
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kN/m |
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2.1.4. Obciążenia długotrwałe |
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qdk= |
gk + pdk |
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qdk= |
(13,76 + 1,04) kN/m = |
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14,80 |
kN/m |
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qdo1= |
go1 + pdo |
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qdo1= |
(15,68 + 1,25) kN/m = |
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16,93 |
kN/m |
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2.2. Schemat statyczny i rozpiętości obliczeniowe |
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Obciążenie stałe |
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go1= |
15,68 |
kN/mb |
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go2= |
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kN/mb |
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Obciążenie zmienne |
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po= |
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kN/mb |
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2.2.1. Schemat statyczny żebra |
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2.2.2. Rozpiętości obliczeniowe |
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leff=ln+a1+a2 |
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Przyjęto oparcie na ścianie o szerokości wieńca 0,26m ,a przyjeta szerokość podciągu wynosi 0,25m |
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a) dla przęseł 1-2 i 3-4 (z poz.1.2.2.a) |
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ln = 6,35-0,5x0,25 = |
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a1 = |
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a2 = |
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l1-2 = l2-3 = 6,25+0,13+0,10= |
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6,48 |
m |
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b) dla przęsła 2-3 (z poz.1.2.2.b) |
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l2-3 = |
6,60 |
m |
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2.3. Obliczenie sił wewnętrznych |
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Siły wewnętrzne obliczono przy użyciu tablic Winklera do wyznaczania obwiedni M oraz Q |
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Wykorzystano wzory: |
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Wartości pomocnicze: |
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- dla przęseł skrajnych |
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go1 x l2 = 15,68 x 6,482 = |
658,6 |
kNm |
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go2 x l2 = 12,12 x 6,482 = |
508,8 |
kNm |
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po x l2 = 1,56 x 6,482 = |
65,5 |
kNm |
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go1 x l = 15,68 x 6,48 = |
101,6 |
kN |
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go2 x l = 12,12 x 6,48 = |
78,5 |
kN |
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po x l = 1,56 x 6,48 = |
10,1 |
kN |
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- dla przęsła środkowego |
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go1 x l2 = 15,68 x 6,602 = |
683,2 |
kNm |
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go2 x l2 = 12,12 x 6,602 = |
527,8 |
kNm |
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po x l2 = 1,56 x 6,602 = |
68,0 |
kNm |
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go1 x l = 15,68 x 6,60 = |
103,5 |
kN |
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go2 x l = 12,12 x 6,60 = |
80,0 |
kN |
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po x l = 1,56 x 6,60 = |
10,3 |
kN |
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Obliczenia wykonano tabelerycznie ,a wykres obwiedni M i Q przedstawiono na rysunku |
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RZĘDNE OBWIEDNI MOMENTÓW |
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x [m] |
x/l [-] |
ago1l2 [kNm] |
ago2l2 [kNm] |
bpol2 [kNm] |
cpol2 [kNm] |
M dla gf >1 |
M dla gf <1 |
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Mmax [kNm] kol.3+5 |
Mmin [kNm] kol.3+6 |
Mmax [kNm] kol.4+5 |
Mmin [kNm] kol.4+6 |
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WSPÓŁCZYNNIKI |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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a |
b |
c |
Przęsło skrajne |
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Przęsło skrajne |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
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0,000 |
0,000 |
0,00 |
0,65 |
0,10 |
23,05 |
17,81 |
2,62 |
-0,33 |
25,67 |
22,72 |
20,43 |
17,48 |
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0,035 |
0,040 |
-0,005 |
1,30 |
0,20 |
39,51 |
30,53 |
4,59 |
-0,66 |
44,10 |
38,86 |
35,11 |
29,87 |
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0,060 |
0,070 |
-0,010 |
1,94 |
0,30 |
49,39 |
38,16 |
5,90 |
-0,98 |
55,29 |
48,41 |
44,06 |
37,18 |
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0,075 |
0,090 |
-0,015 |
2,59 |
0,40 |
52,69 |
40,70 |
6,55 |
-1,31 |
59,24 |
51,37 |
47,25 |
39,39 |
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0,080 |
0,100 |
-0,020 |
3,24 |
0,50 |
49,39 |
38,16 |
6,55 |
-1,64 |
55,94 |
47,75 |
44,71 |
36,52 |
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0,075 |
0,100 |
-0,025 |
3,89 |
0,60 |
39,51 |
30,53 |
5,90 |
-1,97 |
45,41 |
37,55 |
36,42 |
28,56 |
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0,060 |
0,090 |
-0,030 |
4,54 |
0,70 |
23,05 |
17,81 |
4,59 |
-2,29 |
27,64 |
20,76 |
22,39 |
15,52 |
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0,035 |
0,070 |
-0,035 |
5,18 |
0,80 |
0,00 |
0,00 |
2,63 |
-2,63 |
2,63 |
-2,63 |
2,63 |
-2,63 |
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0,000 |
0,04022 |
-0,04022 |
5,51 |
0,85 |
-13,99 |
-10,81 |
1,82 |
-3,21 |
-12,18 |
-17,20 |
-9,00 |
-14,02 |
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-0,02125 |
0,02773 |
-0,04898 |
5,83 |
0,90 |
-29,64 |
-22,90 |
1,34 |
-4,29 |
-28,30 |
-33,92 |
-21,56 |
-27,18 |
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-0,04500 |
0,02042 |
-0,06542 |
6,16 |
0,95 |
-46,92 |
-36,25 |
1,12 |
-5,78 |
-45,80 |
-52,71 |
-35,13 |
-42,04 |
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-0,07125 |
0,01707 |
-0,08831 |
6,48 |
1,00 |
-65,86 |
-50,88 |
1,09 |
-7,64 |
-64,76 |
-73,50 |
-49,79 |
-58,52 |
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-0,100 |
0,01667 |
-0,11667 |
Przęsło środkowe |
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Przęsło środkowe |
0,00 |
0,00 |
-68,32 |
-52,78 |
1,13 |
-7,93 |
-67,19 |
-76,25 |
-51,65 |
-60,71 |
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-0,100 |
0,01667 |
-0,11667 |
0,33 |
0,05 |
-52,09 |
-40,25 |
0,96 |
-6,14 |
-51,14 |
-58,23 |
-39,29 |
-46,38 |
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-0,07625 |
0,01408 |
-0,09033 |
0,66 |
0,10 |
-37,57 |
-29,03 |
1,03 |
-4,77 |
-36,55 |
-42,34 |
-28,00 |
-33,80 |
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-0,055 |
0,01514 |
-0,07014 |
0,99 |
0,15 |
-24,77 |
-19,13 |
1,40 |
-3,86 |
-23,37 |
-28,62 |
-17,74 |
-22,99 |
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-0,036 |
0,02053 |
-0,05678 |
1,32 |
0,20 |
-13,66 |
-10,56 |
2,04 |
-3,40 |
-11,63 |
-17,06 |
-8,52 |
-13,95 |
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-0,020 |
0,030 |
-0,050 |
1,82 |
0,2764 |
0,00 |
0,00 |
3,40 |
-3,40 |
3,40 |
-3,40 |
3,40 |
-3,40 |
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0,000 |
0,050 |
-0,050 |
1,98 |
0,30 |
3,42 |
2,64 |
3,74 |
-3,40 |
7,15 |
0,02 |
6,38 |
-0,76 |
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0,005 |
0,055 |
-0,050 |
2,64 |
0,40 |
13,66 |
10,56 |
4,76 |
-3,40 |
18,42 |
10,27 |
15,31 |
7,16 |
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0,020 |
0,070 |
-0,050 |
3,30 |
0,50 |
17,08 |
13,20 |
5,10 |
-3,40 |
22,18 |
13,68 |
18,29 |
9,80 |
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0,025 |
0,075 |
-0,050 |
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RZĘDNE OBWIEDNI SIŁ POPRZECZNYCH |
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x [m] |
x/l [-] |
ago1l2 [kN] |
ago2l2 [kN] |
bpol2 [kN] |
gpol2 [kN] |
Q dla gf >1 |
Q dla gf <1 |
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Qmax [kN] kol.3+5 |
Qmin [kN] kol.3+6 |
Qmax [kN] kol.4+5 |
Qmin [kN] kol.4+6 |
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WSPÓŁCZYNNIKI |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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a |
b |
g |
Przęsło skrajne |
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Przęsło skrajne |
0,00 |
0,00 |
40,65 |
31,41 |
4,55 |
-0,51 |
45,20 |
40,15 |
35,96 |
30,90 |
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0,4 |
0,4500 |
-0,0500 |
0,65 |
0,10 |
30,49 |
23,56 |
3,60 |
-0,57 |
34,09 |
29,92 |
27,15 |
22,99 |
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0,3 |
0,3560 |
-0,0563 |
1,30 |
0,20 |
20,33 |
15,70 |
2,78 |
-0,76 |
23,11 |
19,57 |
18,49 |
14,94 |
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0,2 |
0,2752 |
-0,0752 |
1,94 |
0,30 |
10,16 |
7,85 |
2,09 |
-1,08 |
12,25 |
9,09 |
9,94 |
6,78 |
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0,1 |
0,2065 |
-0,1065 |
2,59 |
0,40 |
0,00 |
0,00 |
1,51 |
-1,51 |
1,51 |
-1,51 |
1,51 |
-1,51 |
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0 |
0,1496 |
-0,1496 |
3,24 |
0,50 |
-10,16 |
-7,85 |
1,05 |
-2,06 |
-9,11 |
-12,23 |
-6,80 |
-9,92 |
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-0,1 |
0,1042 |
-0,2042 |
3,89 |
0,60 |
-20,33 |
-15,70 |
0,70 |
-2,72 |
-19,62 |
-23,05 |
-15,00 |
-18,43 |
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-0,2 |
0,0694 |
-0,2694 |
4,54 |
0,70 |
-30,49 |
-23,56 |
0,45 |
-3,48 |
-30,04 |
-33,97 |
-23,11 |
-27,04 |
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-0,3 |
0,0443 |
-0,3443 |
5,18 |
0,80 |
-40,65 |
-31,41 |
0,28 |
-4,33 |
-40,37 |
-44,98 |
-31,12 |
-35,73 |
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-0,4 |
0,0280 |
-0,4280 |
5,83 |
0,90 |
-50,82 |
-39,26 |
0,20 |
-5,25 |
-50,62 |
-56,06 |
-39,06 |
-44,51 |
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-0,5 |
0,0193 |
-0,5191 |
6,48 |
1,00 |
-60,98 |
-47,11 |
0,17 |
-6,23 |
-60,81 |
-67,21 |
-46,94 |
-53,35 |
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-0,6 |
0,0167 |
-0,6167 |
Przęsło środkowe |
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Przęsło środkowe |
0,00 |
0,00 |
51,76 |
39,99 |
6,01 |
-0,86 |
57,76 |
50,90 |
45,99 |
39,13 |
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0,5 |
0,5833 |
-0,0833 |
0,66 |
0,10 |
41,40 |
31,99 |
5,01 |
-0,90 |
46,42 |
40,51 |
37,00 |
31,09 |
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0,4 |
0,4870 |
-0,0870 |
1,32 |
0,20 |
31,05 |
23,99 |
4,11 |
-1,02 |
35,16 |
30,03 |
28,10 |
22,97 |
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0,3 |
0,3991 |
-0,0991 |
1,98 |
0,30 |
20,70 |
15,99 |
3,31 |
-1,25 |
24,01 |
19,46 |
19,30 |
14,75 |
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0,2 |
0,3210 |
-0,1210 |
2,64 |
0,40 |
10,35 |
8,00 |
2,61 |
-1,58 |
12,96 |
8,77 |
10,61 |
6,41 |
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0,1 |
0,2537 |
-0,1537 |
3,30 |
0,50 |
0,00 |
0,00 |
2,04 |
-2,04 |
2,04 |
-2,04 |
2,04 |
-2,04 |
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0 |
0,1979 |
-0,1979 |
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Maksymalne siły wewnętrzne wywołane działaniem charakterystycznych obciążeń długotrwałych |
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M1-2dk = 0,080x13,76x6,482+0,1x1,04x6,482 = |
50,59 |
kNm |
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M2-3dk = 0,025x13,76x6,602+0,075x1,04x6,602 = |
18,38 |
kNm |
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Q1p = 0,4x13,76x6,48+0,45x1,04x6,48 = |
38,7 |
kN |
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Q2l = -0,6x13,76x6,48-0,6167x1,04x6,48 = |
-57,7 |
kN |
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Q2p = 0,5x13,76x6,60+0,5833x1,04x6,60 = |
49,41 |
kN |
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Moment w licu podpory (krawędziowy) |
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M2minśr = (-73,50-76,25)x0,5 = |
-74,87 |
kNm |
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Q2l = |
-67,21 |
kN |
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Q2p = |
57,76 |
kN |
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2.4. Wymiarowanie zbrojenia |
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Materiały: |
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Beton: B 20 |
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fcd= |
10,6 |
MPa |
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EC= |
27,5*10^-3 |
kN/mm2 |
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Stal A III (34GS) - zbrojenie konstrukcyjne |
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fyd= |
350 |
MPa |
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Es= |
200 |
kN/mm2 |
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Stal A I (St3SY) - strzemiona |
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fyd= |
210 |
MPa |
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2.4.1. Schemat belki |
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2.4.2. Wymiarowanie zbrojenia na zginanie |
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2.4.2.1. W przęśle 1-2,3-4 |
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2.4.2.1.1. Przekrój zastępczy i efektywna szerokość współpracująca |
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bw= |
300 |
mm |
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b= |
700 |
mm |
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h= |
270 |
mm |
wysokość stropu łącznie z nadbetonem |
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d= |
240 |
mm |
wysokość użyteczna stropu |
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1401,6 |
mm>0,600mm |
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beff= |
600 |
mm |
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2.4.2.1.2. Wymiarowanie zbrojenia |
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Msd= |
59,24 |
kNm = |
59235589 |
Nmm |
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36490500 |
kNcm = |
36,49 |
kNm |
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Msd= |
59,24 |
kNm > Mhf = |
36,49 |
kNm Przekrój rzeczywiście teowy |
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232 |
mm2 = |
2,32 |
cm2 |
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Msd1 = Msd -Mhf =59,24-36,49 = |
22,75 |
kNm |
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d= |
240 |
mm |
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hf= |
30 |
mm |
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0,146 |
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beff= |
600 |
mm |
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fcd= |
10,60 |
N/mm2 |
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< xeff,lim = |
0,530 |
a= |
0,85 |
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fyd = |
350 |
N/mm2 |
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z= |
sb/xeff = |
0,921 |
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bw= |
300 |
mm |
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294,11 |
mm2 = |
2,94 |
cm2 |
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As1 = As11 + As12 = 2,32+2,94= |
5,26 |
cm2 |
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Przyjęto zbrojenie 4#12+4#10 o As1= |
7,66 |
cm2(34GS) |
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2.4.2.2. Nad podporą 2 i 3 |
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Msd= |
74,87 |
kNm = |
74872521 |
Nmm |
d= |
240 |
mm |
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hf= |
30 |
mm |
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0,240 |
beff= |
600 |
mm |
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fcd= |
10,60 |
N/mm2 |
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< xeff,lim = |
0,530 |
a= |
0,85 |
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z= |
sb/xeff = |
0,860 |
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fyd = |
350 |
N/mm2 |
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bw= |
300 |
mm |
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1036 |
mm2 = |
10,36 |
cm2 |
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Przyjęto zbrojenie 4#20 o As1= |
12,6 |
cm2(34GS) |
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2.4.2.3. W przęśle 2-3 |
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2.4.2.3.1. Efektywna szerokość współpracująca |
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1224 |
mm>0,600mm |
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beff= |
600 |
mm |
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2.4.2.3.2. Wymiarowanie zbrojenia |
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Msd= |
22,18 |
kNm = |
22176037 |
Nmm |
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36490500 |
Nmm = |
36,49 |
kNm |
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Msd= |
22,18 |
kNm > Mhf = |
36,49 |
kNm Przekrój pozornie teowy |
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d= |
240 |
mm |
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0,071 |
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hf= |
30 |
mm |
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beff= |
600 |
mm |
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Stąd |
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0,074 |
< xeff,lim = |
0,530 |
fcd= |
10,60 |
N/mm2 |
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a= |
0,85 |
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z= |
sb/xeff = |
0,963 |
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fyd = |
350 |
N/mm2 |
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bw= |
300 |
mm |
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274,14 |
mm2 = |
2,74 |
cm2 |
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Przyjęto zbrojenie 4#12+4#10 o As1= |
7,66 |
cm2(34GS) |
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2.4.3. Wymiarowanie zbrojenia na ścinanie |
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2.4.3.1. Przy podporach 1 i 4 |
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q0= |
17,24 |
kN/m |
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leff= |
6,48 |
m |
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a1,4= |
0,13 |
m |
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Vsd1,4= |
45,20 |
kN |
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42,96 |
kN |
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Nośność przekroju bez zbrojenia VRd1 |
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k=1,6-d = 1,6-0,24 = |
1,36 |
>1 |
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d= |
0,24 |
m |
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B20-->trd= |
0,22 |
N/mm2 |
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AsL= |
766,0 |
mm2 |
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d= |
240,0 |
mm |
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0,011 |
< 0,02 |
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bw= |
300,0 |
mm |
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N = |
49,03 |
kN |
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VRd1= |
49,03 |
kN>Vsd1kr= |
42,96 |
kN |
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Żebro nie wymaga zbrojenia na ścinanie |
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n= |
0,7-fck/200 = |
0,62 |
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B20 Stąd fck= |
16 |
N/mm2 |
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z=0,9d= |
216,0 |
mm |
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bw= |
300 |
mm |
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d= |
240 |
mm |
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fcd= |
10,6 |
N/mm2 |
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Q= |
45 |
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212933 |
N = |
212,9 |
kN |
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2.4.3.2. Podpory 2 z lewej i 3 z prawej strony |
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q0= |
17,24 |
kN/m |
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leff= |
6,48 |
m |
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a2,3= |
0,10 |
m |
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Vsd2l= |
67,21 |
kN |
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65,49 |
kN |
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Nośność przekroju bez zbrojenia VRd1 |
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k=1,6-d = 1,6-0,24 = |
1,36 |
>1 |
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d= |
0,24 |
m |
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B20-->trd= |
0,22 |
N/mm2 |
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AsL= |
1256 |
mm2 |
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d= |
240,0 |
mm |
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0,017 |
< 0,02 |
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bw= |
300,0 |
mm |
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N = |
57,24 |
kN |
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VRd1= |
57,24 |
kN<Vsd2kr= |
65,49 |
kN |
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Żebro wymaga zbrojenia na ścinanie |
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n= |
0,7-fck/200 = |
0,62 |
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B20 Stąd fck= |
16 |
N/mm2 |
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z=0,9d= |
216,0 |
mm |
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bw= |
300 |
mm |
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d= |
240 |
mm |
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fcd= |
10,6 |
N/mm2 |
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Q= |
45 |
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212933 |
N = |
212,9 |
kN |
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Określenie długości odcinka 2-go rodzaju |
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0,41 |
m |
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c=0,41<3d= |
0,72 |
nie dzielę odcinka c |
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Określenie rozstawu strzemion |
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Przyjęto strzemiona: w belkach prefabrykowanych f 4,5 |
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w belce monolitycznej f 6 |
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Asw1 = 4x0,16+2x0,28= |
1,2 |
cm2 |
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fyd = |
210 |
MPa |
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8,31 |
cm |
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Przyjęto rozstaw co 8cm |
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2.4.3.3. Podpory 2 z prawej i 3 z lewej strony |
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q0= |
17,24 |
kN/m |
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leff= |
6,60 |
m |
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a2,3= |
0,10 |
m |
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Vsd2p= |
57,76 |
kN |
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56,04 |
kN |
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Nośność przekroju bez zbrojenia VRd1 |
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VRd1= |
57,24 |
kN<Vsd2kr= |
56,04 |
kN |
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Żebro nie wymaga zbrojenia na ścinanie |
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n= |
0,7-fck/200 = |
0,62 |
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B20 Stąd fck= |
16 |
N/mm2 |
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z=0,9d= |
216,0 |
mm |
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bw= |
300 |
mm |
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d= |
240 |
mm |
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fcd= |
10,6 |
N/mm2 |
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Q= |
45 |
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212933 |
N = |
212,9 |
kN |
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Przyjęto rozstaw strzemion: na odcinku 1-go rodzaju co 14cm |
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na odcinku 2-go rodzaju co 8cm |
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Strzemiona dwucięte f 6 (St3S) |
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2.5. Sprawdzenie stanu granicznego użytkowalności |
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2.5.1. Sprawdzenie zarysowania |
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As = |
766 |
mm2 |
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1,06 |
% |
bw = |
300 |
mm |
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d= |
240 |
mm |
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Mdk,1-2 = |
50,59 |
kNm |
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z = |
0,80 |
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344 |
N/mm2 = |
344 |
MPa |
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0,85 < |
d/h=24/27= |
0,89 |
< 0,95 |
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Szerokość rys prostopadłych jest ograniczona do wlim=0,3mm ,gdy fmax=20mm (wg tab.D.1 PN-B-03264) |
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# =12mm < fmax=20mm |
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2.5.2. Sprawdzenie ugięcia |
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2.5.2.1. Przęsła skrajne |
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leff = |
6,48 |
m |
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18,5 |
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d= |
240,0 |
mm |
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rs = |
1,06 |
% |
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ss = |
344 |
MPa |
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27 |
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13,44 |
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POZ. 3. PODCIĄG |
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Przyjęcie wymiarów przekroju |
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Ze względu na duże obciązenie przyjeto wymiary podciągu 50x25cm |
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3.1. Zestawienie obciążeń |
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3.1.1. Obciążenia stałe |
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WARSTWY |
gk [kN/mb] |
gf>1 |
go1 [kN/mb] |
gf<1 |
go2 [kN/mb] |
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- obciążenia z żebra 2,44x0,5x(6,48+6,60)/0,60 . (z poz.1.1.5.) 2,81x0,5x(6,48+6,60)/0,60 . 2,14x0,5x(6,48+6,60)/0,60 |
26,64 |
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30,63 |
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23,38 |
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- ciężar własny podciągu . 0,25x0,50x25-0,25x1,0x2,96 |
2,53 |
1,1 |
2,79 |
0,9 |
2,28 |
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- tynk cem.-wap. na podciągu . 2x(0,50-0,27)x0,015x19 |
0,13 |
1,3 |
0,17 |
0,8 |
0,10 |
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S= |
29,30 |
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33,58 |
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25,76 |
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3.1.2. Obciążenia zmienne |
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Obciążenie zmienne 1,20x0,5x(6,48+6,60)/0,60 . 1,44x0,5x(6,48+6,60)/0,60 |
pk [kN/mb]= |
13,08 |
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po [kN/mb]= |
15,70 |
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Długotrwała część obc. zm.0,96x0,5x(6,48+6,60)/0,60 . 1,15x0,5x(6,48+6,60)/0,60 |
pdk [kN/mb]= |
10,46 |
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pdo [kN/mb]= |
12,56 |
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3.1.3. Obciążenia całkowite |
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qk = |
gk + pk |
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qk = |
(29,30 + 13,08)kN/m = |
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42,38 |
kN/m |
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qo1 = |
go1 + po |
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qo1 = |
(33,58 + 15,70)kN/m= |
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49,28 |
kN/m |
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qo2 = |
go2 + po |
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qo2 = |
(25,76 + 15,70 )kN/m= |
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kN/m |
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3.1.4. Obciążenia długotrwałe |
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qdk= |
gk + pdk |
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qdk= |
(29,30 + 10,46) kN/m = |
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39,77 |
kN/m |
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qdo1= |
go1 + pdo |
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qdo1= |
(33,58 + 12,56) kN/m = |
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46,14 |
kN/m |
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3.2. Schemat statyczny i rozpiętości obliczeniowe |
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Obciążenie stałe |
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go1= |
33,58 |
kN/mb |
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go2= |
25,76 |
kN/mb |
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Obciążenie zmienne |
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po= |
15,70 |
kN/mb |
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3.2.1. Schemat statyczny podciągu |
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3.2.2. Rozpiętości obliczeniowe |
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leff=ln+a1+a2 |
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Przyjęto oparcie na ścianie o szerokości wieńca 0,26m ,a pozostałe podpory przyjęto o szerokości 0,30m |
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a) dla przęsła 1-2 |
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ln = 5,40-0,5x0,3 = |
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5,25 |
m |
t1=0,26m ;t2=0,3m ;h=0,45m |
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Wg rys.6a PN --->1/3 t1=0,087m< a1 <1/2 t1=0,13m oraz a1<1/2h=0,225m ---> a1= |
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0,13 |
m |
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Wg rys.6c PN --->a1<1/2 t1=0,13m oraz a1<1/2 h=0,225m ---> a1 = |
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0,13 |
m |
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Wg rys.6b PN --->a2 =1/2t2= |
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0,15 |
m |
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l1-2 = 5,25+0,13+0,15= |
5,53 |
m |
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b) dla przęseł 2-3 i 3-4 |
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Wg rys.6b PN teoretyczne punkty podparcia znajdują się w osiach podpór ,zatem leff |
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równa jest osiowemu rozstawowi podpór. |
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l2-3 = l3-4 = |
5,60 |
m |
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c) dla przęsła 4-5 |
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Wg rys.6b PN teoretyczne punkty podparcia znajdują się w osiach podpór ,zatem leff |
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równa jest osiowemu rozstawowi podpór. |
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l4-5 = |
5,00 |
m |
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d) dla przęsła 5-6 |
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ln = 5,00-2x0,5x0,3 = |
4,7 |
m |
t1 = t2 = 0,3m ;h=0,45m |
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Wg rys.6b PN --->a1 =1/2t1= |
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0,15 |
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Wg rys.6c PN --->a2<1/2 t1=0,15m oraz a2<1/2 h=0,225m ---> a2 = |
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0,15 |
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l1-2 = 5,25+0,13+0,15= |
5,00 |
m |
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3.3. Obliczenie sił wewnętrznych |
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Wartości pomocnicze: |
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- dla przęseł skrajnych |
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go1 x l2 = 33,58 x 5,532 = |
1027,0 |
kNm |
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go2 x l2 = 25,76 x 5,532 = |
787,8 |
kNm |
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po x l2 = 15,70 x 5,532 = |
480,0 |
kNm |
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go1 x l = 33,58 x 5,53 = |
185,7 |
kN |
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go2 x l = 25,76 x 5,53 = |
142,5 |
kN |
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po x l = 15,70 x 5,53 = |
86,8 |
kN |
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- dla przęsła przedskrajnego i środkowego |
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go1 x l2 = 33,58 x 5,602 = |
1053,2 |
kNm |
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go2 x l2 = 25,76 x 5,602 = |
807,8 |
kNm |
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po x l2 = 15,70 x 5,602 = |
492,2 |
kNm |
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go1 x l = 33,58 x 5,60 = |
188,1 |
kN |
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go2 x l = 25,76 x 5,60 = |
144,3 |
kN |
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po x l = 15,70 x 5,60 = |
87,9 |
kN |
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Obliczenia wykonano tabelerycznie ,a wykres obwiedni M i Q przedstawiono na rysunku |
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RZĘDNE OBWIEDNI MOMENTÓW |
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x [m] |
x/l [-] |
ago1l2 [kNm] |
ago2l2 [kNm] |
bpol2 [kNm] |
cpol2 [kNm] |
M dla gf >1 |
M dla gf <1 |
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Mmax [kNm] kol.3+5 |
Mmin [kNm] kol.3+6 |
Mmax [kNm] kol.4+5 |
Mmin [kNm] kol.4+6 |
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WSPÓŁCZYNNIKI |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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a |
b |
c |
Przęsło skrajne |
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Przęsło skrajne |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
0,00 |
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0,0000 |
0,0000 |
0,0000 |
0,55 |
0,10 |
35,43 |
27,18 |
19,06 |
-2,54 |
54,49 |
32,89 |
46,23 |
24,63 |
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0,0345 |
0,0397 |
-0,0053 |
1,11 |
0,20 |
60,49 |
46,40 |
33,36 |
-5,04 |
93,85 |
55,45 |
79,76 |
41,36 |
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0,0589 |
0,0695 |
-0,0105 |
1,66 |
0,30 |
75,38 |
57,82 |
42,82 |
-7,58 |
118,20 |
67,80 |
100,64 |
50,24 |
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0,0734 |
0,0892 |
-0,0158 |
2,21 |
0,40 |
80,01 |
61,37 |
47,47 |
-10,13 |
127,48 |
69,88 |
108,84 |
51,24 |
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0,0779 |
0,0989 |
-0,0211 |
2,77 |
0,50 |
74,36 |
57,03 |
47,38 |
-12,62 |
121,73 |
61,73 |
104,41 |
44,41 |
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0,0724 |
0,0987 |
-0,0263 |
3,32 |
0,60 |
58,34 |
44,74 |
42,43 |
-15,17 |
100,77 |
43,17 |
87,18 |
29,58 |
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0,0568 |
0,0884 |
-0,0316 |
3,87 |
0,70 |
32,15 |
24,66 |
32,74 |
-17,57 |
64,88 |
14,58 |
57,39 |
7,09 |
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0,0313 |
0,0682 |
-0,0366 |
4,42 |
0,80 |
-4,31 |
-3,31 |
18,29 |
-20,30 |
13,97 |
-24,62 |
14,98 |
-23,61 |
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-0,0042 |
0,0381 |
-0,0423 |
4,98 |
0,90 |
-51,04 |
-39,15 |
8,78 |
-32,64 |
-42,26 |
-83,68 |
-30,37 |
-71,79 |
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-0,0497 |
0,0183 |
-0,0680 |
5,53 |
1,00 |
-108,15 |
-82,95 |
6,91 |
-57,41 |
-101,23 |
-165,55 |
-76,04 |
-140,36 |
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-0,1053 |
0,0144 |
-0,1196 |
Przęsło przedskrajne |
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Przęsło przedskrajne |
0,00 |
0,00 |
-110,90 |
-85,06 |
7,09 |
-58,87 |
-103,81 |
-169,77 |
-77,98 |
-143,93 |
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-0,1053 |
0,0144 |
-0,1196 |
0,56 |
0,10 |
-60,66 |
-46,53 |
6,89 |
-35,29 |
-53,77 |
-95,96 |
-39,64 |
-81,82 |
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-0,0576 |
0,0140 |
-0,0717 |
1,12 |
0,20 |
-21,06 |
-16,16 |
14,77 |
-24,61 |
-6,30 |
-45,68 |
-1,39 |
-40,77 |
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-0,0200 |
0,0300 |
-0,0500 |
1,68 |
0,30 |
8,00 |
6,14 |
27,71 |
-23,97 |
35,72 |
-15,97 |
33,85 |
-17,83 |
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0,0076 |
0,0563 |
-0,0487 |
2,24 |
0,40 |
26,65 |
20,44 |
35,74 |
-23,33 |
62,38 |
3,31 |
56,17 |
-2,89 |
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0,0253 |
0,0726 |
-0,0474 |
2,80 |
0,50 |
34,65 |
26,58 |
38,84 |
-22,69 |
73,49 |
11,96 |
65,41 |
3,89 |
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0,0329 |
0,0789 |
-0,0461 |
3,36 |
0,60 |
32,12 |
24,64 |
37,06 |
-22,00 |
69,19 |
10,12 |
61,70 |
2,64 |
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0,0305 |
0,0753 |
-0,0447 |
3,92 |
0,70 |
19,17 |
14,70 |
30,32 |
-21,36 |
49,49 |
-2,19 |
45,02 |
-6,66 |
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0,0182 |
0,0616 |
-0,0434 |
4,48 |
0,80 |
-4,42 |
-3,39 |
19,15 |
-21,26 |
14,72 |
-25,69 |
15,75 |
-24,66 |
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-0,0042 |
0,0389 |
-0,0432 |
5,04 |
0,90 |
-38,55 |
-29,57 |
13,78 |
-31,80 |
-24,76 |
-70,34 |
-15,78 |
-61,36 |
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-0,0366 |
0,0280 |
-0,0646 |
5,60 |
1,00 |
-83,10 |
-63,74 |
15,90 |
-54,74 |
-67,20 |
-137,83 |
-47,84 |
-118,47 |
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-0,0789 |
0,0323 |
-0,1112 |
Przęsło środkowe |
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Przęsło środkowe |
0,00 |
0,00 |
-83,10 |
-63,74 |
15,90 |
-54,74 |
-67,20 |
-137,83 |
-47,84 |
-118,47 |
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-0,0789 |
0,0323 |
-0,1112 |
0,56 |
0,10 |
-35,70 |
-27,39 |
14,42 |
-31,16 |
-21,28 |
-66,86 |
-12,96 |
-58,54 |
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-0,0339 |
0,0293 |
-0,0633 |
1,12 |
0,20 |
1,16 |
0,89 |
20,48 |
-19,94 |
21,64 |
-18,78 |
21,37 |
-19,05 |
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0,0011 |
0,0416 |
-0,0405 |
1,68 |
0,30 |
27,49 |
21,08 |
32,24 |
-19,44 |
59,73 |
8,05 |
53,33 |
1,64 |
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0,0261 |
0,0655 |
-0,0395 |
2,24 |
0,40 |
43,29 |
33,20 |
39,62 |
-19,44 |
82,91 |
23,84 |
72,83 |
13,76 |
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0,0411 |
0,0805 |
-0,0395 |
2,80 |
0,50 |
48,55 |
37,24 |
42,09 |
-19,44 |
90,64 |
29,11 |
79,33 |
17,80 |
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0,0461 |
0,0855 |
-0,0395 |
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RZĘDNE OBWIEDNI SIŁ POPRZECZNYCH |
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x [m] |
x/l [-] |
ago1l2 [kN] |
ago2l2 [kN] |
bpol2 [kN] |
gpol2 [kN] |
Q dla gf >1 |
Q dla gf <1 |
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Qmax [kN] kol.3+5 |
Qmin [kN] kol.3+6 |
Qmax [kN] kol.4+5 |
Qmin [kN] kol.4+6 |
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WSPÓŁCZYNNIKI |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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a |
b |
g |
Przęsło skrajne |
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Przęsło skrajne |
0,00 |
0,00 |
73,30 |
56,23 |
38,83 |
-4,57 |
112,14 |
68,74 |
95,06 |
51,66 |
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0,3947 |
0,4474 |
-0,0526 |
0,55 |
0,10 |
54,73 |
41,98 |
30,70 |
-5,12 |
85,43 |
49,61 |
72,68 |
36,86 |
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0,2947 |
0,3537 |
-0,0590 |
1,11 |
0,20 |
36,16 |
27,74 |
23,66 |
-6,76 |
59,82 |
29,40 |
51,40 |
20,97 |
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0,1947 |
0,2726 |
-0,0779 |
1,66 |
0,30 |
17,59 |
13,49 |
17,70 |
-9,47 |
35,29 |
8,12 |
31,19 |
4,02 |
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|
0,0947 |
0,2039 |
-0,1091 |
2,21 |
0,40 |
-0,98 |
-0,75 |
12,77 |
-13,23 |
11,78 |
-14,21 |
12,01 |
-13,98 |
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-0,0053 |
0,1471 |
-0,1524 |
2,77 |
0,50 |
-19,56 |
-15,00 |
8,83 |
-17,96 |
-10,73 |
-37,52 |
-6,17 |
-32,96 |
|
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-0,1053 |
0,1017 |
-0,2069 |
3,32 |
0,60 |
-38,13 |
-29,25 |
5,81 |
-23,63 |
-32,32 |
-61,76 |
-23,44 |
-52,87 |
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-0,2053 |
0,0669 |
-0,2722 |
3,87 |
0,70 |
-56,70 |
-43,49 |
3,64 |
-30,14 |
-53,06 |
-86,84 |
-39,85 |
-73,63 |
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-0,3053 |
0,0419 |
-0,3472 |
4,42 |
0,80 |
-75,27 |
-57,74 |
2,23 |
-37,40 |
-73,04 |
-112,67 |
-55,51 |
-95,14 |
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-0,4053 |
0,0257 |
-0,4309 |
4,98 |
0,90 |
-93,84 |
-71,98 |
1,47 |
-45,33 |
-92,38 |
-139,17 |
-70,51 |
-117,31 |
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-0,5053 |
0,0169 |
-0,5222 |
5,53 |
1,00 |
-112,42 |
-86,23 |
1,25 |
-53,78 |
-111,17 |
-166,20 |
-84,98 |
-140,01 |
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-0,6053 |
0,0144 |
-0,6196 |
Przęsło przedskrajne |
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Przęsło przedskrajne |
0,00 |
0,00 |
98,98 |
75,92 |
52,57 |
-6,31 |
151,55 |
92,67 |
128,49 |
69,61 |
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0,5263 |
0,5981 |
-0,0718 |
0,56 |
0,10 |
80,17 |
61,50 |
44,11 |
-6,64 |
124,28 |
73,54 |
105,60 |
54,86 |
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0,4263 |
0,5018 |
-0,0755 |
1,12 |
0,20 |
61,37 |
47,07 |
36,40 |
-7,72 |
97,77 |
53,65 |
83,47 |
39,35 |
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0,3263 |
0,4141 |
-0,0878 |
1,68 |
0,30 |
42,56 |
32,64 |
29,57 |
-9,68 |
72,13 |
32,88 |
62,21 |
22,97 |
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0,2263 |
0,3364 |
-0,1101 |
2,24 |
0,40 |
23,75 |
18,22 |
23,71 |
-12,60 |
47,46 |
11,15 |
41,93 |
5,61 |
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0,1263 |
0,2697 |
-0,1434 |
2,80 |
0,50 |
4,95 |
3,79 |
18,86 |
-16,54 |
23,81 |
-11,60 |
22,66 |
-12,75 |
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|
0,0263 |
0,2146 |
-0,1882 |
3,36 |
0,60 |
-13,86 |
-10,63 |
15,09 |
-21,52 |
1,23 |
-35,38 |
4,46 |
-32,15 |
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|
-0,0737 |
0,1717 |
-0,2448 |
3,92 |
0,70 |
-32,67 |
-25,06 |
12,23 |
-27,97 |
-20,44 |
-60,64 |
-12,83 |
-53,03 |
|
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-0,1737 |
0,1391 |
-0,3182 |
4,48 |
0,80 |
-51,48 |
-39,48 |
10,36 |
-34,42 |
-41,11 |
-85,90 |
-29,12 |
-73,90 |
|
|
-0,2737 |
0,1179 |
-0,3916 |
5,04 |
0,90 |
-70,28 |
-53,91 |
9,34 |
-42,19 |
-60,94 |
-112,47 |
-44,56 |
-96,10 |
|
|
-0,3737 |
0,1063 |
-0,4800 |
5,60 |
1,00 |
-89,09 |
-68,33 |
9,04 |
-50,68 |
-80,04 |
-139,77 |
-59,29 |
-119,02 |
|
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-0,4737 |
0,1029 |
-0,5766 |
Przęsło środkowe |
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Przęsło środkowe |
0,00 |
0,00 |
94,04 |
72,13 |
51,94 |
-7,99 |
145,97 |
86,05 |
124,07 |
64,14 |
|
|
0,5000 |
0,5909 |
-0,0909 |
0,56 |
0,10 |
75,23 |
57,70 |
43,46 |
-8,30 |
118,69 |
66,93 |
101,16 |
49,40 |
|
|
0,4000 |
0,4944 |
-0,0944 |
1,12 |
0,20 |
56,42 |
43,28 |
35,71 |
-9,34 |
92,13 |
47,08 |
78,99 |
33,93 |
|
|
0,3000 |
0,4063 |
-0,1063 |
1,68 |
0,30 |
37,61 |
28,85 |
28,82 |
-11,24 |
66,44 |
26,37 |
57,67 |
17,61 |
|
|
0,2000 |
0,3279 |
-0,1279 |
2,24 |
0,40 |
18,81 |
14,43 |
22,89 |
-14,10 |
41,70 |
4,71 |
37,31 |
0,33 |
|
|
0,1000 |
0,2604 |
-0,1604 |
2,80 |
0,50 |
0,00 |
0,00 |
17,98 |
-17,98 |
17,98 |
-17,98 |
17,98 |
-17,98 |
|
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0,0000 |
0,2045 |
-0,2045 |
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Maksymalne siły wewnętrzne wywołane działaniem charakterystycznych obciążeń długotrwałych |
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M1-2dk = 0,0781x29,30x5,532+0,100x10,46x5,532 = |
101,98 |
kNm |
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M2-3dk = 0,0331x29,30x5,602+0,0787x10,46x5,602 = |
56,24 |
kNm |
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M3-4dk = 0,0462x29,30x5,602+0,0855x10,46x5,602 = |
70,51 |
kNm |
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Q1p = 0,395x29,30x5,53+0,447x10,46x5,53 = |
89,87 |
kN |
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Q2l = -0,606x29,30x5,53-0,620x10,46x5,53 = |
-134,07 |
kN |
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Q2p = 0,526x29,30x5,60+0,589x10,46x5,60 = |
120,83 |
kN |
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Q3l =- 0,474x29,30x5,60-0,576x10,46x5,60 = |
-111,53 |
kN |
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Q2p = 0,526x29,30x5,60+0,589x10,46x5,60 = |
120,83 |
kN |
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Moment w licu podpory (krawędziowy) |
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M2minśr = (-165,55-169,77)x0,5 = |
-167,66 |
kNm |
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3.4. Wymiarowanie zbrojenia |
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Materiały: |
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Beton: B 20 |
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fcd= |
10,6 |
MPa |
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EC= |
27,5*10^-3 |
kN/mm2 |
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Stal A III (34GS) - zbrojenie konstrukcyjne |
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fyd= |
350 |
MPa |
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Es= |
200 |
kN/mm2 |
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Stal A I (St3SY) - strzemiona |
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fyd= |
210 |
MPa |
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3.4.1. Schemat belki |
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3.4.2. Wymiarowanie zbrojenia na zginanie |
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3.4.2.1. W przęśle 1-2,5-6 |
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Msd1-2= |
127,48 |
kNm = |
127477824 |
Nmm |
bw= |
250 |
mm |
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h= |
500 |
mm |
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0,256 |
a1 = |
30 |
mm |
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d= |
470 |
mm |
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Stąd |
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0,302 |
< xeff,lim = |
0,530 |
fcd= |
10,60 |
N/mm2 |
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a= |
0,85 |
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Przekrój pojedynczo zbrojony |
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fyd = |
350 |
N/mm2 |
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0,849 |
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912,61 |
mm2 = |
9,13 |
cm2 |
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Przyjęto 5#16 o As1= |
10,05 |
cm2(34GS) |
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3.4.2.2. Nad podporą 2 i 5 |
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Msd2,5= |
167,66 |
kNm = |
167663433 |
Nmm |
bw= |
250 |
mm |
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h= |
500 |
mm |
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0,337 |
d= |
470 |
mm |
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fcd= |
10,60 |
N/mm2 |
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Stąd |
|
0,429 |
< xeff,lim = |
0,530 |
a= |
0,85 |
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fyd = |
350 |
N/mm2 |
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Przekrój pojedynczo zbrojony |
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0,786 |
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1297,53 |
mm2 = |
12,98 |
cm2 |
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Przyjęto 5#20 o As1= |
15,70 |
cm2(34GS) |
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3.4.2.3. W przęśle 2-3,4-5 |
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Msd2,5= |
73,49 |
kNm = |
73486977 |
Nmm |
bw= |
250 |
mm |
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h= |
500 |
mm |
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0,148 |
d= |
470 |
mm |
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fcd= |
10,60 |
N/mm2 |
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Stąd |
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0,161 |
< xeff,lim = |
0,530 |
a= |
0,85 |
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fyd = |
350 |
N/mm2 |
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Przekrój pojedynczo zbrojony |
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0,920 |
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485,73 |
mm2 = |
4,86 |
cm2 |
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Przyjęto 4#16 o As1= |
8,04 |
cm2(34GS) |
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3.4.2.4. Nad podporą 3 i 4 |
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Msd2,5= |
137,83 |
kNm = |
137833124 |
Nmm |
bw= |
250 |
mm |
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h= |
500 |
mm |
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0,277 |
d= |
470 |
mm |
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fcd= |
10,60 |
N/mm2 |
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Stąd |
|
0,332 |
< xeff,lim = |
0,530 |
a= |
0,85 |
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fyd = |
350 |
N/mm2 |
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Przekrój pojedynczo zbrojony |
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0,834 |
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1004,77 |
mm2 = |
10,05 |
cm2 |
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Przyjęto 4#20 o As1= |
12,56 |
cm2(34GS) |
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3.4.2.5. W przęśle 3-4 |
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Msd2,5= |
90,64 |
kNm = |
90637920 |
Nmm |
bw= |
250 |
mm |
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h= |
500 |
mm |
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0,182 |
d= |
470 |
mm |
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fcd= |
10,60 |
N/mm2 |
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Stąd |
|
0,203 |
< xeff,lim = |
0,530 |
a= |
0,85 |
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fyd = |
350 |
N/mm2 |
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Przekrój pojedynczo zbrojony |
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0,899 |
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613,13 |
mm2 = |
6,13 |
cm2 |
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Przyjęto 4#16 o As1= |
8,04 |
cm2(34GS) |
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3.4.3. Wymiarowanie zbrojenia na ścinanie |
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bw= |
250 |
mm |
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Połączenie belki z podciągiem |
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fctd= |
0,87 |
N/mm2 |
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d= |
470 |
mm |
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204450 |
N = |
204,45 |
kN |
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Stosuję dodatkowo cztery strzemiona w pobliżu belek |
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3.4.3.1. Przy podporach 1 i 6 |
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q0= |
49,28 |
kN/m |
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leff= |
5,53 |
m |
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a1,6= |
0,13 |
m |
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Vsd1,6= |
112,14 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
105,73 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nośność przekroju bez zbrojenia VRd1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
k=1,6-d = 1,6-0,47 = |
1,13 |
>1 |
|
|
|
|
|
|
|
|
|
|
|
B20-->trd= |
0,22 |
N/mm2 |
|
|
AsL= |
10,05 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
d= |
470 |
mm |
|
|
|
|
|
|
|
|
|
0,009 |
< 0,02 |
|
bw= |
250 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
63065 |
N = |
63,06 |
kN |
|
|
|
|
|
|
|
|
VRd1= |
63,06 |
kN<Vsd1kr= |
105,73 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nośność krzyżulców betonowych na ściskanie przy ścinaniu VRd2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
n= |
0,7-fck/200 = |
0,62 |
|
|
B20 Stąd fck= |
16 |
N/mm2 |
|
|
|
|
|
|
|
z=0,9d=0,9x470= |
423 |
mm |
|
|
bw= |
250 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
d= |
470 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
fcd= |
10,6 |
N/mm2 |
|
|
|
|
|
|
|
|
|
|
|
347495 |
N = |
347,49 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Określenie długości odcinka 2-go rodzaju |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1,12 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
c=1,12<3d= |
1,41 |
nie dzielę odcinka c |
|
|
|
|
|
|
|
|
|
|
|
Określenie rozstawu strzemion |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przyjęto strzemiona czterocięte f 8 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Asw1 = 4x0,5 = |
2,00 |
cm2 |
|
fyd = |
210 |
MPa |
|
|
|
|
|
|
|
|
|
|
|
|
z= |
423 |
mm |
|
|
|
|
|
|
|
|
|
|
168 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przyjęto rozstaw co 15cm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Na odcinku 2-go rodzaju przyjęto rozstaw strzemionaco 22cm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3.4.3.2. Przy podporach 2 z lewej i 5 z prawej strony |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
q0= |
49,28 |
kN/m |
|
|
|
|
|
|
|
leff= |
5,53 |
m |
|
|
a2= |
0,15 |
m |
|
|
|
|
|
|
|
Vsd= |
166,20 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
158,81 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nośność przekroju bez zbrojenia VRd1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
k=1,6-d = 1,6-0,47 = |
1,13 |
>1 |
|
|
|
|
|
|
|
|
|
|
|
B20-->trd= |
0,22 |
N/mm2 |
|
|
AsL= |
15,70 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
d= |
470 |
mm |
|
|
|
|
|
|
|
|
|
0,013 |
< 0,02 |
|
bw= |
250 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
N = |
70,93 |
kN |
|
|
|
|
|
|
|
|
VRd1= |
70,93 |
kN<Vsd1kr= |
158,81 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nośność krzyżulców betonowych na ściskanie przy ścinaniu VRd2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
n= |
0,7-fck/200 = |
0,62 |
|
|
B20 Stąd fck= |
16 |
N/mm2 |
|
|
|
|
|
|
|
|
z=0,9d=0,9x470= |
423 |
mm |
|
bw= |
250 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
d= |
470 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
fcd= |
10,6 |
N/mm2 |
|
|
|
|
|
|
|
|
|
|
|
347495 |
N = |
347,49 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Określenie długości odcinka 2-go rodzaju |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1,53 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Określenie rozstawu strzemion |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przyjęto strzemiona czterocięte f 8 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Asw1 = 4x0,5 = |
2,00 |
cm2 |
|
fyd = |
210 |
MPa |
|
|
|
|
|
|
|
|
|
|
|
|
z= |
423 |
mm |
|
|
|
|
|
|
|
|
|
|
112 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przyjęto rozstaw co 11cm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Na odcinku 2-go rodzaju przyjęto rozstaw strzemionaco 22cm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3.4.3.3. Przy podporach 2 z prawej i 5 z lewej strony |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
q0= |
49,28 |
kN/m |
|
|
|
|
|
|
|
leff= |
5,60 |
m |
|
|
a2= |
0,15 |
m |
|
|
|
|
|
|
|
Vsd= |
151,55 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
144,16 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nośność przekroju bez zbrojenia VRd1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
k=1,6-d = 1,6-0,47 = |
1,13 |
>1 |
|
|
|
|
|
|
|
|
|
|
|
B20-->trd= |
0,22 |
N/mm2 |
|
|
AsL= |
15,70 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
d= |
470 |
mm |
|
|
|
|
|
|
|
|
|
0,013 |
< 0,02 |
|
bw= |
250 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
N = |
70,93 |
kN |
|
|
|
|
|
|
|
|
VRd1= |
70,93 |
kN<Vsd1kr= |
144,16 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nośność krzyżulców betonowych na ściskanie przy ścinaniu VRd2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
n= |
0,7-fck/200 = |
0,62 |
|
|
B20 Stąd fck= |
16 |
N/mm2 |
|
|
|
|
|
|
|
|
z=0,9d=0,9x470= |
423 |
mm |
|
bw= |
250 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
d= |
470 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
fcd= |
10,6 |
N/mm2 |
|
|
|
|
|
|
|
|
|
|
|
347495 |
N = |
347,49 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Określenie długości odcinka 2-go rodzaju |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1,42 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Określenie rozstawu strzemion |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przyjęto strzemiona czterocięte f 8 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Asw1 = 4x0,5 = |
2,00 |
cm2 |
|
fyd = |
210 |
MPa |
|
|
|
|
|
|
|
|
|
|
|
|
z= |
423 |
mm |
|
|
|
|
|
|
|
|
|
|
123 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przyjęto rozstaw co 11cm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3.4.3.4. Przy podporach 3 z lewej i 4 z prawej strony |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
q0= |
49,28 |
kN/m |
|
|
|
|
|
|
|
leff= |
5,60 |
m |
|
|
a2= |
0,15 |
m |
|
|
|
|
|
|
|
Vsd= |
139,77 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
132,38 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nośność przekroju bez zbrojenia VRd1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
k=1,6-d = 1,6-0,47 = |
1,13 |
>1 |
|
|
|
|
|
|
|
|
|
|
|
B20-->trd= |
0,22 |
N/mm2 |
|
|
AsL= |
12,56 |
cm2 |
|
|
|
|
|
|
|
|
|
|
|
|
d= |
470 |
mm |
|
|
|
|
|
|
|
|
|
0,011 |
< 0,02 |
|
bw= |
250 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
66559 |
N = |
66,56 |
kN |
|
|
|
|
|
|
|
|
VRd1= |
66,56 |
kN<Vsd1kr= |
132,38 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nośność krzyżulców betonowych na ściskanie przy ścinaniu VRd2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
n= |
0,7-fck/200 = |
0,62 |
|
|
B20 Stąd fck= |
16 |
N/mm2 |
|
|
|
|
|
|
|
|
z=0,9d=0,9x470= |
423 |
mm |
|
bw= |
250 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
d= |
470 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
fcd= |
10,6 |
N/mm2 |
|
|
|
|
|
|
|
|
|
|
|
347495 |
N = |
347,49 |
kN |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Określenie długości odcinka 2-go rodzaju |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1,39 |
m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Określenie rozstawu strzemion |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przyjęto strzemiona czterocięte f 8 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Asw1 = 4x0,5 = |
2,00 |
cm2 |
|
fyd = |
210 |
MPa |
|
|
|
|
|
|
|
|
|
|
|
|
z= |
423 |
mm |
|
|
|
|
|
|
|
|
|
|
134 |
mm |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przyjęto rozstaw co 11cm |
|
|
|
|
|
|
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Na odcinku 2-go rodzaju przyjęto rozstaw strzemionaco 22cm |
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3.4.3.5. Przy podporach 3 z prawej i 4 z lewej strony |
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q0= |
49,28 |
kN/m |
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leff= |
5,60 |
m |
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a2= |
0,15 |
m |
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Vsd= |
145,97 |
kN |
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138,58 |
kN |
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Nośność przekroju bez zbrojenia VRd1 |
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k=1,6-d = 1,6-0,47 = |
1,13 |
>1 |
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B20-->trd= |
0,22 |
N/mm2 |
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AsL= |
12,56 |
cm2 |
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d= |
470 |
mm |
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0,011 |
< 0,02 |
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bw= |
250 |
mm |
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66559 |
N = |
66,56 |
kN |
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VRd1= |
66,56 |
kN<Vsd1kr= |
138,58 |
kN |
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Nośność krzyżulców betonowych na ściskanie przy ścinaniu VRd2 |
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n= |
0,7-fck/200 = |
0,62 |
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B20 Stąd fck= |
16 |
N/mm2 |
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z=0,9d=0,9x470= |
423 |
mm |
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bw= |
250 |
mm |
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d= |
470 |
mm |
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fcd= |
10,6 |
N/mm2 |
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347495 |
N = |
347,49 |
kN |
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Określenie długości odcinka 2-go rodzaju |
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1,46 |
m |
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Określenie rozstawu strzemion |
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Przyjęto strzemiona czterocięte f 8 |
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Asw1 = 4x0,5 = |
2,00 |
cm2 |
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fyd = |
210 |
MPa |
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z= |
423 |
mm |
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128 |
mm |
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Przyjęto rozstaw co 11cm |
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Na odcinku 2-go rodzaju przyjęto rozstaw strzemionaco 22cm |
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3.5. Sprawdzenie stanu granicznego użytkowalności |
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3.5.1. Sprawdzenie zarysowania (rysy prostopadłe),przęsło 1-2 |
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Dla bw = 250 mm < 300 b = |
1,3 |
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h = |
500 |
mm |
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Act,eff= 2,5(h-d)xbw = |
18750 |
mm2 |
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d = |
470 |
mm |
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bw= |
250 |
mm |
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0,054 |
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As= |
10,05 |
cm2 |
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k1= |
0,8 |
pr.żebrowany |
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80 |
mm |
k2= |
0,5 |
el. zginany |
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f= |
16 |
mm |
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10416667 |
mm3 |
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fctm= |
1,90 |
N/mm2 |
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19791666,6666667 |
Nmm = |
19,79 |
kNm |
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Msdk= |
101,98 |
kNm |
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0,194 |
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254 |
N/mm2 |
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Es= |
205000 |
N/mm2 |
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b1= |
1,0 |
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b2= |
0,5 |
obc. dług. |
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0,0012 |
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b = |
1,3 |
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0,126 |
mm |
srm= |
80 |
mm |
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Wk= |
0,126 |
mm<Wlim= |
0,3mm |
Warunek spełniony |
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3.5.2. Sprawdzenie zarysowania (rysy ukośne),przęsło 1-2 |
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Vsdk= |
134,07 |
kN |
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d = |
470 |
mm |
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1,141 |
N/mm2 |
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bw= |
250 |
mm |
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Suma stopni zbrojenia strzemionami i pr.odgietymi |
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0,0053 |
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Asw1 = |
2,00 |
cm2 |
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s1 = |
15 |
cm |
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rw2 = 0 |
- belka nie jest zbrojona prętami odgiętymi |
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0,0053 |
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b1 = |
0,7 |
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|
700 |
mm |
f1 = |
16 |
mm |
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Es= |
205000 |
N/mm2 |
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fck = |
16 |
N/mm2 |
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0,208 |
mm |
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Wk= |
0,208 |
mm<Wlim= |
0,3mm |
Warunek spełniony |
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3.5.3. Sprawdzenie ugięcia ,przęsło 1-2 |
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0,083 |
Msd = |
101,98 |
kNm |
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leff= |
5,53 |
m |
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b1= |
1,0 |
pr.żebrowane |
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b2= |
0,5 |
obc. dług. |
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0,194 |
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|
125000 |
mm2 |
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h= |
500 |
mm |
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|
1500 |
mm |
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bw= |
250 |
mm |
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Dla B20 |
Ecm = |
27500 |
N/mm2 |
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2Ac/u = |
167 |
mm |
F(oo,to) = |
2,48 |
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7902 |
N/mm2 |
Dla obciażenia długotrwałego |
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Dla przekroju niezarysowanego: |
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25,94 |
|
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Ec,eff = |
7902 |
N/mm2 |
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Es= |
205000 |
N/mm2 |
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bw= |
250 |
mm |
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As1= |
1005 |
mm2 |
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a= |
30 |
mm |
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h= |
500 |
mm |
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3,866E+09 |
mm4 = |
386603 |
cm4 |
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fyd= |
350,0 |
N/mm2 |
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|
156 |
mm |
|
fcd= |
10,60 |
N/mm2 |
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a= |
0,85 |
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3,055E+13 |
Nmm2 |
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Moment bezwładności dla przekroju zarysowanego: |
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2495082367,79961 |
mm4 |
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xeff= |
156,16 |
mm |
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|
0,194 |
h= |
500,0 |
mm |
b= |
250,0 |
mm |
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As1= |
1005,0 |
mm2 |
a= |
30 |
mm |
Eceff= |
7902,3 |
N/mm2 |
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1,985E+13 |
Nmm2 |
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leff= |
5,53 |
m |
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ak= |
0,083 |
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Msk= |
101,98 |
kNm |
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13,09 |
mm < alim= leff/200 = |
|
27,65 |
mm |
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Warunek został spełniony. |
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3.6. Warunki konstrukcyjne zakotwienia prętów |
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Podstawowe długości zakotwienia |
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fyd = |
350 |
MPa |
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0,70 |
m |
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fbd = |
2 |
MPa |
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0,875 |
m |
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3.6.1. Zakotwienie zbrojenia górnego nad podporą 2 i 5 |
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Wymagana długość zakotwienia |
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As,req = |
12,98 |
cm2 |
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As,prov = |
15,70 |
cm2 |
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0,72 |
m > 0,3 Ib = |
0,26 |
m |
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Pręty należy przedłużyć o 0,5h+Ib,net =0,5x0,5+0,72= |
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0,97 |
m |
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3.6.2. Zakotwienie zbrojenia górnego nad podporą 3 i 4 |
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Wymagana długość zakotwienia |
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As,req = |
10,05 |
cm2 |
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0,70 |
m |
As,prov = |
12,56 |
cm2 |
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Pręty należy przedłużyć o 0,5h+Ib,net =0,5x0,5+0,72= |
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0,95 |
m |
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3.6.3. Zakotwienie zbrojenia dolnego przęseł 1-2 i 5-6 |
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Wymagana długość zakotwienia |
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As,req = |
9,13 |
cm2 |
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As,prov = |
10,05 |
cm2 |
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0,64 |
m >0,6 Ib = |
0,42 |
m |
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3.6.4. Zakotwienie zbrojenia dolnego przęsła 2-3,3-4,5-6 |
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Wymagana długość zakotwienia |
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As,req = |
6,13 |
cm2 |
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As,prov = |
8,04 |
cm2 |
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0,53 |
m >0,6 Ib = |
#REF! |
m |
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3.6.5. Zakotwienie zbrojenia konstrukcyjnego nad podporą 1 i 6 |
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Podstawowe długości zakotwienia |
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fyd = |
350 |
MPa |
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0,35 |
m |
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fbd = |
2 |
MPa |
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POZ. 4. SŁUP |
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Przyjęto stropodach pełny (niewentylowany) o konstrukcji w postaci stropu gęstożebrowego DZ-4. |
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Do obliczeń sił w słupach i stopie fundamentowej przyjęto: |
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- strop DZ-4 |
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- przekrój belek, podciągów jak w stropie międzykondygnacyjnym |
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4.1. Zestawienie obciążeń |
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4.1.1. Słup IV kondygnacji |
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4.1.1.1. Obciążenia stałe |
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3xpapa na lepiku |
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gładź cementowa 3cm |
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styropian 8cm |
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strop DZ-4 |
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tynk c-w 1,5cm |
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OBCIĄŻENIE STROPODACHU |
gsk [kN/m2] |
gf |
gso [kN/m2] |
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- 3xpapa na lepiku |
0,150 |
1,3 |
0,195 |
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- gładź cementowa 3cm 0,03x21 |
0,630 |
1,3 |
0,819 |
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- styropian 8cm 0,08x0,45 |
0,036 |
1,2 |
0,043 |
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- strop DZ-4 o wys.27cm |
2,960 |
1,1 |
3,256 |
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- tynk c-w 1,5cm 0,015x19 |
0,285 |
1,3 |
0,371 |
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S= |
4,06 |
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4,68 |
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Obciążenie ze stropodachu na słup: |
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Gsk = 4,06x5,60x(6,35+6,60)/2= |
147,25 |
kN |
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Gso = 4,68x5,60x(6,35+6,60)/2= |
169,83 |
kN |
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Obciążenie słupa podciągiem: |
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Gpk [kN] |
gf |
Gpo [kN] |
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- ciężar własny podciągu . (0,25x0,50x25-0,25x1,0x2,96)x5,60 |
13,36 |
1,1 |
14,69 |
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- tynk cem.-wap. na podciągu . (2x(0,50-0,27)x0,015x19)x5,60 |
0,73 |
1,3 |
0,95 |
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S= |
14,09 |
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15,65 |
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Obciążenie całkowite: |
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Gk = Gsk+Gpk = 147,25+14,09 = |
161,34 |
kN |
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Go = Gso+Gpo = 169,83+15,65 = |
185,48 |
kN |
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4.1.1.2. Obciążenie śniegiem |
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Lokalizacja: Katowice-I strefa |
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Obciążenie stropodachu: |
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0,56 |
kN/m2 |
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kN/m2 |
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Obciążenie na słup: |
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Sk = 0,56x5,60x(6,35+6,60)/2= |
20,31 |
kN |
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So = 0,78x5,60x(6,35+6,60)/2= |
28,43 |
kN |
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4.1.1.3. Obciążenie całkowite |
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NkIV = Gk +Sk = 161,34+20,31 = |
181,65 |
kN |
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NoIV = Go + So = 185,48+28,43 = |
213,90 |
kN |
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4.1.2. Słup I kondygnacji |
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4.1.2.1. Obciążenia stałe |
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Obciążenie jednym stropem: |
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Nsk = (4,07x(5,60-0,2)+0,2x0,27x25)x(6,35+6,60)/2 = |
151,15 |
kN |
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Nso = (6,48x(5,60-0,2)+0,2x0,27x25x1,1)x(6,35+6,60)/2 = |
173,36 |
kN |
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Ciężar własny słupa: |
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gk [kN] |
gf |
go [kN] |
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0,3x0,3x(3,9-0,5)x25 = |
7,65 |
1,1 |
8,42 |
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OBCIĄŻENIE |
Gk [kN] |
Go [kN] |
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- stropodach |
147,25 |
169,83 |
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- strop nad I,II,III kondygnacją . 3x151,15 ; 3x173,36 |
453,46 |
520,08 |
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- słupy na I,II,III,IV kondygnacji . 4x7,65 ;4x8,42 |
30,60 |
33,66 |
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S= |
600,71 |
689,91 |
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4.1.2.2. Obciążenia zmienne (śnieg + użytkowe) |
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OBCIĄŻENIE |
Pk [kN] |
Po [kN] |
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- śnieg |
20,31 |
28,43 |
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- użytkowe 3x(2,0x(5,6-0,12)x(6,35+6,60)/2) . 3x(2,40x(5,60-0,12)x(6,35+6,60)/2) |
212,90 |
255,48 |
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S= |
233,20 |
283,91 |
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4.1.2.3. Obciążenie całkowite |
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NkI = Gk +Pk = 600,71+233,20= |
833,92 |
kN |
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NoI =Go + Po = 689,91+283,91 = |
973,82 |
kN |
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4.1.2.4. Obciążenie długotrwałe |
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Długotrwała część obciążenia zmiennego |
Pdk [kN] |
Pdo [kN] |
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- użytkowe 3x(1,6x(5,6-0,12)x(6,35+6,60)/2) . 3x(1,92x(5,60-0,12)x(6,35+6,60)/2) |
170,32 |
204,38 |
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Ndk = Gk + Pdk = 600,71+ 170,32 = |
771,03 |
kN |
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Ndo = Go + Pdo = 689,91+204,38 = |
894,29 |
kN |
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4.2. Schemat statyczny i długość obliczeniowa |
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4.2.1. Długość obliczeniowa |
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lcol = 3,9+0,30+0,04-0,50 = |
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3,74 |
m |
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lo = 1,0xlcol = |
3,74 |
m |
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4.2.2. Schemat statyczny słupa |
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4.3. Wymiarowanie zbrojenia |
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Materiały: |
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Beton: B 20 |
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fcd= |
10,6 |
MPa |
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EC= |
27500 |
N/mm2 |
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Stal A III (34GS) - zbrojenie konstrukcyjne |
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fyd= |
350 |
MPa |
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Es= |
205000 |
N/mm2 |
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Stal A I (St3SY) - strzemiona |
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fyd= |
210 |
MPa |
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4.3.1. Wymiarowanie zbrojenia głównego |
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lo= |
3,74 |
m |
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h= |
0,30 |
m |
7 < |
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12,5 |
< 30 |
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Należy uwzględnić wpływ smukłości i obciążeń długotrwałych |
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Określenie mimośrodu |
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eo= |
ee+ ea |
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Mimośród konstrukcyjny |
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ee =0 |
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Momośród niezamierzony |
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ea= |
10 |
mm |
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eo=ea +ee= |
10 |
mm |
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Wpływ smukłości i obciążeń długotrwałych |
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b = |
300 |
mm |
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h = |
300 |
mm |
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675000000 |
mm4 = |
67500 |
cm4 |
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Minimalny stopień zbrojenia |
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4,17 |
cm2 |
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2,7 |
cm2 |
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Przyjęto 4#20 o As1=As2= |
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6,28 |
cm2 |
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1256 |
mm2 = |
12,6 |
cm2 |
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Przyjęto otulinę a= |
50 |
mm |
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12560000 |
mm4 = |
1256 |
cm4 |
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fcd= |
10,6 |
N/mm2 |
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0,27 |
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0,033 |
Zatem |
0,27 |
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Nsd = |
973,8 |
kN |
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Nsd,lt = |
894,3 |
kN |
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1,92 |
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2,0 |
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Ecm = |
27500 |
N/mm2 |
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Es = |
205000 |
N/mm2 |
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2,90E+06 |
N = |
2895 |
kN |
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1,507 |
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15,1 |
mm |
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115 |
mm <d-a =300-50 =250mm |
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85 |
mm |
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Występuje ściskanie z małym mimośrodem |
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x eff,lim = |
0,53 |
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84468750 |
x2eff |
-198671180 |
xeff |
-100867087,419743 |
= 0 |
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x2eff |
-2,352 |
xeff |
-1,194 |
= 0 |
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xeff = |
2,781 |
---> k = -1 |
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1115350 |
N = |
1115 |
kN |
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NRd = |
1115 |
kN > Nsd = |
974 |
kN |
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4.3.2. Wymiarowanie strzemion |
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b = |
300 |
mm |
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0,014 |
< 3% |
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As1= As2 = |
628 |
mm2 |
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d = |
300 |
mm |
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15f = 300mm |
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Przyjęto strzemiona dwucięte f 8 co 26 cm ,a przy końcach słupa co 13cm. |
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POZ. 5. STOPA FUNDAMENTOWA |
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5.1. Siły w poziomie posadzki parteru |
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- stałe |
Ngk [kN] = |
600,71 |
Ngo [kN] = |
689,91 |
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- zmienne |
Npk [kN] = |
233,20 |
Npo [kN] = |
283,91 |
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- całkowite |
Nk [kN] = |
833,92 |
No [kN] = |
973,82 |
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- długotrwała część obc. zmiennego |
Npdk [kN] = |
170,32 |
Npdo [kN] = |
204,38 |
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- długotrwałe |
Ndk [kN] = |
771,03 |
Ndo [kN] = |
894,29 |
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5.2. Warunki gruntowe |
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PARAMETRY GEOTECHNICZNE grunt: Ił |
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- stopień plastyczności |
IL = |
0,40 |
- |
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- gęstość objętościowa |
r = |
1,85 |
kN/m3 |
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- obliczeniowa gęst. obj. r( r) = rx0,9 |
r ( r) = |
1,67 |
kN/m3 |
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- wilgotność naturalna |
wn = |
34 |
% |
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- spójność gruntu |
cu = |
39,0 |
kPa |
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- obliczeniowa spójn.gr. cu( r) =cux0,9 |
cu( r) = |
35,10 |
kPa |
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- kąt tarcia wewnętrznego |
fu = |
8 |
o |
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- obl.wart.kąt tarc.wewn. fu( r)=fux0,9 |
fu( r) = |
7,2 |
o |
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Parametry określono metodą B |
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m = 0,9x0,9 = |
0,81 |
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5.3. Przyjęcie wymiarów stopy fundamentowej |
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w = |
300 |
mm |
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B =L = |
2200 |
mm |
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h = |
900 |
mm |
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a = |
400 |
mm |
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5.4. Zestawienie obciążeń |
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- obliczeniowa siła osiowa w poziomie posadzki parteru |
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Nsd = |
973,8 |
kN |
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- ciężar stopy Gr1 |
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2,63 |
m3 |
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72,3 |
kN |
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- ciężar gruntu nad stopą (przyjęto ciężar obj.gruntu nasypowego gf =17kN/m3) |
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45,1 |
kN |
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- obciążenie z posadzki |
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38,8 |
kN |
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Całkowita siła działająca na podłoże |
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1130,0 |
kN |
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5.5. Opór graniczny podłoża |
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fu( r) = 7,2 ----> |
Nc= |
7,23 |
ND= |
1,92 |
NB= |
0,09 |
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iC = iB =iD =1,0 |
B =L = |
2,2 |
m |
Dmin = |
1,2 |
m |
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1928,6 |
kN |
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m x QfN = 0,81x1928,6 = |
1562,2 |
kN > Nr = |
1130,0 |
kN |
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Nośność podłoża jest wystarczająca |
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5.6. Wymiarowanie stopy fundamentowej |
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Materiały: |
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Beton: B 20 |
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fcd= |
10,6 |
MPa |
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EC= |
27500 |
N/mm2 |
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Stal A I (St3S) - zbrojenie konstrukcyjne |
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fyd= |
210 |
MPa |
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Es= |
205000 |
N/mm2 |
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5.6.1. Wymiarowanie na zginanie |
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Odpór podłoża gruntowego |
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233,47 |
kPa |
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Przyjęto otulinę a = |
50 |
mm |
Zbrojenie pretami #16 |
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d = 0,9-0,05-0,016 = |
0,83 |
m |
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Moment zginajacy wspornik |
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151,29 |
kNm |
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960 |
mm2 = |
9,60 |
cm2 |
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Przyjęto 11 f12 w rozstawie co 20cm o As = |
12,43 |
cm2 |
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5.6.2. Sprawdzenie stopy na przebicie |
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Nr = |
1130,0 |
kN |
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4,6 |
m |
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A = 22 = |
4,0 |
m2 |
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fctd = |
870 |
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196,1 |
kN < fctd xupx d = 870 x4x 0,83 = |
2902,3 |
kN |
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Przebicie stopy nie nastąpi |
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