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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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1.1.5. Zestawienie obciążenia montażowego |
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1.1.4. Obciążenia długotrwałe |
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OBCIĄŻENIE |
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gmk |
gf |
gmo |
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[kN/m2] |
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[kN/m2] |
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qdk= |
gk + pdk |
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ciężar stropu |
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2,960 |
1,1 |
3,256 |
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qdk= |
(4,07 + 1,6) kN/m2 = |
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5,67 |
kN/m2 |
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obciążenie montaż. |
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1,000 |
1,4 |
1,400 |
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qdo1= |
go1 + pdo |
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Razem: |
3,960 |
Razem: |
4,656 |
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qdo1= |
(4,68 + 1,92) kN/m2 = |
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6,60 |
kN/m2 |
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1.1.4. Obciążenie belki stropowej |
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1.1.5. Obciążenie żebra |
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gmk= |
gk*0,60 |
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gmk= |
3,960 |
kN/m2 |
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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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gmk= |
2,376 |
kN/mb |
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gmo= |
4,656 |
kN/m2 |
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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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gmo= |
go*0,60 |
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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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gmo= |
2,794 |
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 |
m |
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 |
m |
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Wg rys.6b PN --->a2 =1/2t2= |
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0,10 |
m |
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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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L1= |
6480,00 |
mm |
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L2= |
6600,00 |
mm |
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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 |
m |
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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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- 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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- 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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121,16 |
cm=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= |
240,00 |
mm |
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hf= |
30,00 |
mm |
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Msd= |
17,85 |
kNm = |
17845332 |
Nmm |
beff= |
470,0 |
mm |
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fcd= |
10,60 |
N/mm2 |
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a= |
0,85 |
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2858 |
kNcm = |
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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0,073 |
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beff= |
470,00 |
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= |
240,00 |
mm |
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Stal klasy III ---> fyd = |
350,0 |
N/mm2 |
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fyd= |
350,00 |
N/mm2 |
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z= |
sb/xeff = |
0,962 |
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220,8 |
mm2 |
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Przyjęto zbrojenie 3f10 o As1= |
237,0 |
mm2 |
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Górą pręt montażowy f 8,0 (St0S) (wg tablic w poradniku). |
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1.4.3. 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 = |
0,997 |
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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 1f14 o As1= |
154,0 |
mm2 |
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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= |
154,0 |
mm2 |
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bw= |
110,0 |
mm |
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0,006 |
< 0,02 |
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d= |
240,0 |
mm |
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VRd1= |
15,85 |
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 = |
237,0 |
mm2 |
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0,90 |
% |
bw = |
110,0 |
mm |
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d= |
240,0 |
mm |
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Msd = |
17,85 |
kNm |
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z = |
0,85 |
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36,91 |
kN/cm2 = |
369 |
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=14mm (wg tab.D.1 PN-B-03264) |
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f =10mm < fmax=14mm |
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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 = |
0,90 |
% |
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ss = |
369 |
MPa |
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27 |
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13,28 |
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Warunek nie został spełniony. |
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Na podstawie "Konstrukcji Żelbetowych " Kobiaka stosuję dwa żebra rozdzielcze |
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w połowie rozpiętości belki stosując pręty f 12 |
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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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79,1 |
kN |
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1.4. 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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1.4.1. 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 |
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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1.4.3. Nośność przekroju w przęśle na zginanie |
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1.4.3.1. Sprawdzenie typu przekroju |
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d= |
240,0 |
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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1.4.3.2 Obliczenie nośności w przęśle |
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Msd= |
15,43 |
kNm |
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0,063 |
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beff= |
470,0 |
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= |
240,0 |
mm |
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Stal klasy III ---> fyd= |
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350,0 |
N/m2 |
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fyd= |
350,0 |
N/mm2 |
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z= |
sb/xeff = |
0,967 |
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189,86 |
mm2 |
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Przyjęto zbrojenie 3f10 o As1= |
237,0 |
mm2 |
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Górą pręt montażowy f 8,0 (St0S) (wg tablic w poradniku). |
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1.4.3. 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= |
110,0 |
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 = |
0,997 |
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d= |
240,0 |
mm |
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fyd= |
350,0 |
N/mm2 |
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138,17 |
mm2 |
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Przyjęto zbrojenie 1f14 o As1= |
154,0 |
mm2 |
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1.4.5. 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= |
154,0 |
mm2 |
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B20-->trd= |
0,22 |
N/mm2 |
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d= |
240,0 |
mm |
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bw= |
110,0 |
mm |
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0,006 |
< 0,02 |
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VRd1= |
15,85 |
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= |
16,0 |
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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Przyjęto strzemiona dwucięte f 4,5 (A-I) w rozstawie co 180mm |
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1.5. Sprawdzenie stanu granicznego użytkowalności |
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1.5.1. Sprawdzenie zarysowania |
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As = |
237,0 |
mm2 |
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0,90 |
% |
bw = |
110,0 |
mm |
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d= |
240,0 |
mm |
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Msd = |
15,43 |
kNm |
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z = |
0,85 |
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31,91 |
kN/cm2 = |
319 |
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=14mm (wg tab.D.1 PN-B-03264) |
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f =10mm < fmax=22mm |
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1.5.2. Sprawdzenie ugięcia |
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leff = |
6,60 |
m |
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20,2 |
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d= |
240,0 |
mm |
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rs = |
0,90 |
% |
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ss = |
319 |
MPa |
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27,5 |
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15,83 |
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Warunek nie został spełniony. |
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Na podstawie "Konstrukcji Żelbetowych " Kobiaka stosuję dwa żebra rozdzielcze |
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w połowie rozpiętości belki stosując pręty f 12 |
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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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79,1 |
kN |
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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.) |
2,444 |
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2,810 |
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2,145 |
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- ciężar własny żebra 0,2x0,27x25 |
1,350 |
1,1 |
1,485 |
0,9 |
1,215 |
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- tynk cem.-wap. na żebrze 0,2x0,015x19 |
0,057 |
1,3 |
0,074 |
0,8 |
0,046 |
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- ścianka działowa 12cm (cegła na zaprawie cem.-wap.) 0,12x18x(3,9-0,27) |
7,841 |
1,1 |
8,625 |
0,9 |
7,057 |
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- tynk cem.-wap. na ściance działowej 2x0,015x19x(3,9-0,27) |
2,069 |
1,3 |
2,690 |
0,8 |
1,655 |
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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= |
12,12 |
kN/mb |
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Obciążenie zmienne |
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po= |
1,56 |
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 0,20m |
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a) dla przęseł 1-2 i 3-4 (z poz.1.2.2.a) |
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ln = 6,35-0,5x0,2 = |
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6,25 |
m |
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a1 = |
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m |
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a2 = |
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m |
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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 |
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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 |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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a |
b |
c |
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Przęsło skrajne |
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Przęsło skrajne |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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Przęsło środkowe |
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Przęsło środkowe |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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a |
b |
g |
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Przęsło skrajne |
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Przęsło skrajne |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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Przęsło środkowe |
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Przęsło środkowe |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 = 0,4x13,76x6,482+0,45x1,04x6,482 = |
250,8 |
kN |
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Q2l = -0,6x13,76x6,482-0,6167x1,04x6,482 = |
-57,7 |
kN |
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Q2p = 0,5x13,76x6,602+0,5833x1,04x6,602 = |
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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Mmax= |
28,740 |
kNm |
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Q= |
22,542 |
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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140,16 |
cm=1,40m>0,60m |
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beff= |
600 |
mm |
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2.4.2.1.2. Wymiarowanie zbrojenia |
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d= |
240 |
mm |
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hf= |
30 |
mm |
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Msd= |
59,24 |
kNm = |
59235589 |
Nmm |
beff= |
600 |
mm |
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fcd= |
10,60 |
N/mm2 |
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a= |
0,85 |
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3649,05 |
kNcm = |
36,49 |
kNm |
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Msd= |
59,24 |
kNm > Mhf = |
36,49 |
kNm Przekrój rzeczywiście teowy |
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2,32 |
cm2 |
fyd = |
350 |
N/mm2 |
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bw= |
300 |
mm |
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Msd1 = Msd -Mhf =59,24-36,49 = |
22,75 |
kNm |
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0,073 |
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Stąd |
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0,076 |
< xeff,lim = |
0,530 |
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z= |
sb/xeff = |
0,962 |
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2,81 |
mm2 |
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As1 = As11 + As12 = 2,32+2,81= |
5,13 |
mm2 |
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Przyjęto zbrojenie 3f10 o As1= |
237,0 |
mm2 |
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Górą pręt montażowy f 8,0 (St0S) (wg tablic w poradniku). |
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2.4.6.) Zbrojenie na ścinanie: |
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a= |
45 Stąd |
ctga=1 |
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O= |
44 59' 59'' |
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leff= |
0 |
m |
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L1= |
210,000 |
m |
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VsdA= |
22,542 |
kN |
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q0= |
17,244 |
kN/m |
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VsdAkr= |
VsdA-qo*ai |
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ai= |
0,150 |
m |
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VsdAkr= |
19,955 |
kN |
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ai= |
150,0 |
mm |
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Wspólczynnik efktywności: |
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n= |
0,7-fck/200>=0,5 |
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B20 Stąd fck= |
16,0 |
N/mm2 |
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n= |
0,62 |
>0,5 |
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d= |
#REF! |
m |
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k= 1,6-d |
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As1= |
#REF! |
mm2 |
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k= |
#REF! |
>1 |
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bw= |
300,0 |
mm |
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rL= |
As1/bw*d |
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d= |
240,0 |
mm |
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rL= |
#REF! |
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Nośnośc przekroju bez zbrojenia. |
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VRd1= |
(k*trd(1,2+4,0*rL))*bw*d |
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trd= |
0,22 |
N/mm2 |
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VRd1= |
#REF! |
N |
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rL= |
#REF! |
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VRd1= |
#REF! |
kN |
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k= |
#REF! |
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VRd1= |
#REF! |
kN<VsdAkr= |
19,955 |
kN |
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d= |
240,0 |
mm |
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bw= |
300,0 |
mm |
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Nośnośc przekroju zbrojonego strzemionami. |
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n= |
0,62 |
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bw= |
300,0 |
mm |
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VRd2= |
bw*z*g*fcd/(cotO+tgO) |
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d= |
240,0 |
mm |
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VRd2= |
#REF! |
kN |
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fcd= |
#REF! |
N/mm2 |
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z=0,9*d= |
216,0 |
mm |
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O= |
44 59' 59'' |
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Rozstaw srzemion na odcinku wymagajacym zbrojenia na ścinanie: |
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Przyjęto strzemiona dwucięte ze stali A-I dla której fywd = |
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210 |
N/mm |
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c= |
(VsdAkr-VRd1)/q |
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f 4,5 o Asw= |
32,00 |
mm2 |
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z= |
216,00 |
mm |
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c= |
#REF! |
mm |
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VsdAkr= |
19,96 |
kN |
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c<3*d= |
720,0 |
mm |
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cotO= |
1,00 |
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Warunek spełniony. |
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VRd1= |
#REF! |
kN |
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q= |
17,244 |
kN/m |
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Odcinka c nie trzeba dzielić na mniejsze części |
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d= |
240,0 |
mm |
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Przyjęto że ścinanie zostanie przeniesione na c przez strzemiona pionowe. |
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Liczę łączną powierzchnie stali potrzebna do przeniesienia ścinania. |
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Asw= |
c*VsdAkr/z*fywd*cot(O) |
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VsdAkr= |
19955 |
N |
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Asw= |
#REF! |
mm2 |
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Asw1= |
64 |
mm2 |
Pole pow. jednego strzemiona dwucietego o4,5 |
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pmnożone przez 2 (2 żeberka) |
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n= |
Asw/Asw1 |
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n= |
#REF! |
szt. |
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Przyjęto 2 szt. |
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Siła przenoszona przez strzemiona pionowe. |
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VsdAkr= |
19,955 |
kN |
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Vsds= |
(5*Asw1*z*fywd* cot(O))/C |
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Asw1= |
64 |
mm2 |
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Vsds= |
#REF! |
N |
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z= |
216,00 |
mm |
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Vsds= |
#REF! |
kN |
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fywd= |
210 |
N/mm |
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VRd3= |
Vsds>=Vsdakr |
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#REF! |
kN > |
19,96 |
kN |
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O.K. |
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POZ. 3. PODCIĄG |
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4.1.) Obciążenia. |
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4.1.1.)Obciążenia stałe. |
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Na podstawie KOBIAKA projektuję podciąg nnie osłabiając go. Czyli żeberka opieram na |
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podciągu (książka tom I, strona 417) |
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230 |
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623 |
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600 |
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G = G1 + G2 |
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G1= |
go*L kNm |
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G1= |
72,000 |
kN/m |
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go= |
15,000 |
kN/mb |
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G2= |
(H-h)*0,3*25*L *1,1 kNm |
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L= |
4,800 |
m |
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G2= |
14,652 |
kN/m |
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H= |
0,600 |
m |
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h= |
0,230 |
m |
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G = |
Wojciech Koczan:
g1(suma oc.stałych i ciężarupodciagu
86,652 |
kN/m |
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Zamiana na obciążenie równomierne: |
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G * 0,61= |
52,858 |
kN/m |
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4.1.2.) Obciążenia zmienne. |
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P= |
po * lżebr. |
kN/m |
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po = |
3,585 |
kN |
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P= |
13,1193432 |
kN/m |
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lżebr.= |
3,660 |
m |
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4.2.) Schemat statyczny belki. |
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l1 |
l2 |
l2 |
l2 |
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4.2.2.) Długość obliczeniowa przęseł. |
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Przęsło skrajne |
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l1= |
4,45 |
m |
l3= |
5,00 |
m |
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Przesło posrednie |
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l2= |
5,12 |
m |
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4.3.) Obliczenia statyczne. |
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4.3.1.)Momenty: |
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maxM(x/l)=a*g*L2+b*p*L2 |
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p= |
13,119 |
kN/m |
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minM(x/l)=a*g*L2+c*p*L2 |
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g= |
52,858 |
kN/m |
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Przekrój |
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Współczynnki |
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L |
Mnożniki |
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Momenty |
(kNm) |
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L [m] |
a |
b |
c |
(m) |
gl2 (kNm) |
pl2 (kNm) |
Mmax |
Mmin |
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Przęsło skrajne |
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0 |
0 |
0 |
0 |
5,00 |
1321,4430 |
327,9836 |
0 |
0 |
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0,5 |
0,03429 |
0,03964 |
-0,00536 |
5,00 |
1321,4430 |
327,9836 |
58,3135495812 |
43,5542884812 |
|
|
|
|
|
|
|
|
|
|
|
|
1 |
0,05857 |
0,06929 |
-0,01071 |
5,00 |
1321,4430 |
327,9836 |
100,1228987682 |
73,8842123682 |
|
|
|
|
|
|
|
|
|
|
|
|
1,5 |
0,07286 |
0,08893 |
-0,01607 |
5,00 |
1321,4430 |
327,9836 |
125,4479167494 |
91,0096408494 |
|
|
|
|
|
|
|
|
|
|
|
|
1,9645 |
|
|
|
5,00 |
1321,4430 |
327,9836 |
0 |
0 |
|
|
|
|
|
|
|
|
|
|
|
|
2 |
0,07714 |
0,09857 |
-0,02143 |
5,00 |
1321,4430 |
327,9836 |
134,2654545006 |
94,9074249006 |
|
|
|
|
|
|
|
|
|
|
|
|
2,5 |
0,07143 |
0,09822 |
-0,02679 |
5,00 |
1321,4430 |
327,9836 |
126,6052207176 |
85,6039933818 |
|
|
|
|
|
|
|
|
|
|
|
|
3 |
0,05572 |
0,08786 |
-0,03214 |
5,00 |
1321,4430 |
327,9836 |
102,4474412988 |
63,0894116988 |
|
|
|
|
|
|
|
|
|
|
|
|
3,5 |
0,03 |
0,0675 |
-0,0375 |
5,00 |
1321,4430 |
327,9836 |
61,78218165 |
27,34390575 |
|
|
|
|
|
|
|
|
|
|
|
|
3,9285 |
0 |
0,04209 |
-0,04209 |
5,00 |
1321,4430 |
327,9836 |
13,8048288822 |
-14,1328124622 |
|
|
|
|
|
|
|
|
|
|
|
|
4 |
-0,00571 |
0,03738 |
-0,04309 |
5,00 |
1321,4430 |
327,9836 |
4,7145866904 |
-24,6530630628 |
|
|
|
|
|
|
|
|
|
|
|
|
4,25 |
-0,02732 |
0,02484 |
-0,05216 |
5,00 |
1321,4430 |
327,9836 |
-27,9547106328 |
-58,3128707976 |
|
|
|
|
|
|
|
|
|
|
|
|
4,5 |
-0,05143 |
0,01629 |
-0,06772 |
5,00 |
1321,4430 |
327,9836 |
-62,6189609718 |
-98,1264633426 |
|
|
|
|
|
|
|
|
|
|
|
|
4,75 |
-0,07803 |
0,01393 |
-0,09197 |
5,00 |
1321,4430 |
327,9836 |
-98,5433860206 |
-142,6473380232 |
|
|
|
|
|
|
|
|
|
|
|
|
5 |
-0,1014 |
0,0134 |
-0,12054 |
5,00 |
1321,4430 |
327,9836 |
-129,599340228 |
-173,5294609332 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Przęsło środkowe |
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
5 |
-0,10714 |
0,01340 |
-0,12054 |
5,12 |
1385,633415168 |
343,9157 |
-143,84829358198 |
-173,5294609332 |
|
|
|
|
|
|
|
|
|
|
|
|
5,256 |
-0,08160 |
0,01163 |
-0,09323 |
5,12 |
1385,633415168 |
343,9157 |
-109,067946965965 |
-145,13094835663 |
|
|
|
|
|
|
|
|
|
|
|
|
5,512 |
-0,05857 |
0,01455 |
-0,07212 |
5,12 |
1385,633415168 |
343,9157 |
-76,1525755403305 |
-105,959750159145 |
|
|
|
|
|
|
|
|
|
|
|
|
5,768 |
-0,03803 |
0,01980 |
-0,05780 |
5,12 |
1385,633415168 |
343,9157 |
-45,8861077132739 |
-72,5739668389233 |
|
|
|
|
|
|
|
|
|
|
|
|
6,024 |
-0,02000 |
0,03000 |
-0,05000 |
5,12 |
1385,633415168 |
343,9157 |
-17,3951969918976 |
-44,908453822464 |
|
|
|
|
|
|
|
|
|
|
|
|
6,362432 |
0 |
0,04882 |
-0,04882 |
5,12 |
1385,633415168 |
343,9157 |
16,7899649808531 |
-16,7899649808531 |
|
|
|
|
|
|
|
|
|
|
|
|
6,536 |
0,00857 |
0,05678 |
-0,04821 |
5,12 |
1385,633415168 |
343,9157 |
31,4024124034843 |
-4,70529802953032 |
|
|
|
|
|
|
|
|
|
|
|
|
7,048 |
0,02714 |
0,07357 |
-0,04643 |
5,12 |
1385,633415168 |
343,9157 |
62,9079697004691 |
21,6380844546195 |
|
|
|
|
|
|
|
|
|
|
|
|
7,56 |
0,03572 |
0,08036 |
-0,04464 |
5,12 |
1385,633415168 |
343,9157 |
77,1318920761049 |
34,1424282783449 |
|
|
|
|
|
|
|
|
|
|
|
|
7,742784 |
|
|
|
5,12 |
1385,633415168 |
343,9157 |
0 |
0 |
|
|
|
|
|
|
|
|
|
|
|
|
8,072 |
0,03429 |
0,07715 |
-0,04286 |
5,12 |
1385,633415168 |
343,9157 |
74,0464668620882 |
32,7731424591348 |
|
|
|
|
|
|
|
|
|
|
|
|
8,584 |
0,02286 |
0,06393 |
-0,04107 |
5,12 |
1385,633415168 |
343,9157 |
53,6621112354669 |
17,5509616453485 |
|
|
|
|
|
|
|
|
|
|
|
|
9,096 |
0,00143 |
0,04170 |
-0,04027 |
5,12 |
1385,633415168 |
343,9157 |
16,322740906623 |
-11,8680298733961 |
|
|
|
|
|
|
|
|
|
|
|
|
9,123136 |
0 |
0,04092 |
-0,04092 |
5,12 |
1385,633415168 |
343,9157 |
14,0730308688347 |
-14,0730308688347 |
|
|
|
|
|
|
|
|
|
|
|
|
9,352 |
-0,01303 |
0,03451 |
-0,04754 |
5,12 |
1385,633415168 |
343,9157 |
-6,18627223435346 |
-34,4045562712031 |
|
|
|
|
|
|
|
|
|
|
|
|
9,608 |
-0,03000 |
0,03105 |
-0,06105 |
5,12 |
1385,633415168 |
343,9157 |
-30,8904196476764 |
-62,565056573866 |
|
|
|
|
|
|
|
|
|
|
|
|
9,864 |
-0,04947 |
0,03173 |
-0,08129 |
5,12 |
1385,633415168 |
343,9157 |
-57,6348395579376 |
-96,5041931453203 |
|
|
|
|
|
|
|
|
|
|
|
|
10,12 |
-0,07143 |
0,03571 |
-0,10714 |
5,12 |
1385,633415168 |
343,9157 |
-86,6945648277062 |
-135,822924055786 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
4.3.2.) Siły poprzeczne. |
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|
|
Qmax= |
a*g*L+b*p*L |
|
|
p= |
13,119 |
kN/m |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Qmin= |
a*g*L+g*p*L |
|
|
g= |
52,858 |
kN/m |
|
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|
Przekrój |
|
Współczynnki |
|
L |
Mnożniki |
|
Siły poprz. (kN) |
|
|
|
|
|
|
|
|
|
|
|
|
|
L [m] |
a |
b |
g |
(m) |
gl (kN) |
pl (kN) |
Qmax |
Qmin |
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|
|
Przęsło skrajne |
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
0 |
0,3929 |
0,4464 |
-0,0535 |
5,00 |
264,2886 |
65,5967 |
133,1214 |
100,3296 |
|
|
|
|
|
|
|
|
|
|
|
|
0,5 |
0,2929 |
0,3528 |
-0,5990 |
5,00 |
264,2886 |
65,5967 |
100,5527 |
38,1177 |
|
|
|
|
|
|
|
|
|
|
|
|
1 |
0,1929 |
0,2715 |
-0,0788 |
5,00 |
264,2886 |
65,5967 |
68,7908 |
45,8122 |
|
|
|
|
|
|
|
|
|
|
|
|
1,5 |
0,0929 |
0,2029 |
-0,1101 |
5,00 |
264,2886 |
65,5967 |
37,8620 |
17,3302 |
|
|
|
|
|
|
|
|
|
|
|
|
1,9645 |
0 |
0,1498 |
-0,1498 |
5,00 |
264,2886 |
65,5967 |
9,8264 |
-9,8264 |
|
|
|
|
|
|
|
|
|
|
|
|
2 |
-0,0071 |
0,1461 |
-0,1533 |
5,00 |
264,2886 |
65,5967 |
7,7072 |
-11,9324 |
|
|
|
|
|
|
|
|
|
|
|
|
2,5 |
-0,1071 |
-0,1007 |
-0,2079 |
5,00 |
264,2886 |
65,5967 |
-34,9109 |
-41,9429 |
|
|
|
|
|
|
|
|
|
|
|
|
3 |
-0,2071 |
0,066 |
-0,2731 |
5,00 |
264,2886 |
65,5967 |
-50,4048 |
-72,6486 |
|
|
|
|
|
|
|
|
|
|
|
|
3,5 |
-0,3071 |
0,041 |
-0,3481 |
5,00 |
264,2886 |
65,5967 |
-78,4736 |
-103,9972 |
|
|
|
|
|
|
|
|
|
|
|
|
3,9285 |
|
|
|
5,00 |
264,2886 |
65,5967 |
0,0000 |
0,0000 |
|
|
|
|
|
|
|
|
|
|
|
|
4 |
-0,4071 |
0,0247 |
-0,4319 |
5,00 |
264,2886 |
65,5967 |
-105,9717 |
-135,9231 |
|
|
|
|
|
|
|
|
|
|
|
|
4,25 |
|
|
|
5,00 |
264,2886 |
65,5967 |
0,0000 |
0,0000 |
|
|
|
|
|
|
|
|
|
|
|
|
4,5 |
-0,5071 |
0,016 |
-0,5231 |
5,00 |
264,2886 |
65,5967 |
-132,9712 |
-168,3344 |
|
|
|
|
|
|
|
|
|
|
|
|
4,75 |
|
|
|
5,00 |
264,2886 |
65,5967 |
0,0000 |
0,0000 |
|
|
|
|
|
|
|
|
|
|
|
|
5 |
-0,6071 |
0,0134 |
-0,6205 |
5,00 |
264,2886 |
65,5967 |
-159,5706 |
-201,1524 |
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
Przęsło środkowe |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
5 |
0,5357 |
0,6027 |
-0,067 |
5,12 |
270,6315 |
67,1710 |
185,4613 |
140,4768 |
|
|
|
|
|
|
|
|
|
|
|
|
5,256 |
|
|
|
5,12 |
270,6315 |
67,1710 |
0,0000 |
0,0000 |
|
|
|
|
|
|
|
|
|
|
|
|
5,512 |
0,4357 |
0,5064 |
-0,0707 |
5,12 |
270,6315 |
67,1710 |
151,9296 |
113,1652 |
|
|
|
|
|
|
|
|
|
|
|
|
5,768 |
|
|
|
5,12 |
270,6315 |
67,1710 |
0,0000 |
0,0000 |
|
|
|
|
|
|
|
|
|
|
|
|
6,024 |
0,3357 |
0,4187 |
-0,0830 |
5,12 |
270,6315 |
67,1710 |
118,9755 |
85,2758 |
|
|
|
|
|
|
|
|
|
|
|
|
6,362432 |
|
|
|
5,12 |
270,6315 |
67,1710 |
0,0000 |
0,0000 |
|
|
|
|
|
|
|
|
|
|
|
|
6,536 |
0,2357 |
0,341 |
-0,1153 |
5,12 |
270,6315 |
67,1710 |
86,6932 |
56,0430 |
|
|
|
|
|
|
|
|
|
|
|
|
7,048 |
0,13357 |
0,2742 |
-0,1385 |
5,12 |
270,6315 |
67,1710 |
54,5666 |
26,8451 |
|
|
|
|
|
|
|
|
|
|
|
|
7,56 |
0,0357 |
0,219 |
-0,1833 |
5,12 |
270,6315 |
67,1710 |
24,3720 |
-2,6509 |
|
|
|
|
|
|
|
|
|
|
|
|
7,742784 |
0 |
0,2028 |
-0,2028 |
5,12 |
270,6315 |
67,1710 |
13,6223 |
-13,6223 |
|
|
|
|
|
|
|
|
|
|
|
|
8,072 |
-0,0643 |
0,1755 |
-0,2398 |
5,12 |
270,6315 |
67,1710 |
-5,6131 |
-33,5092 |
|
|
|
|
|
|
|
|
|
|
|
|
8,584 |
-0,1643 |
0,1435 |
-0,3078 |
5,12 |
270,6315 |
67,1710 |
-34,8257 |
-65,1400 |
|
|
|
|
|
|
|
|
|
|
|
|
9,096 |
-0,2643 |
0,1222 |
-0,3865 |
5,12 |
270,6315 |
67,1710 |
-63,3196 |
-97,4895 |
|
|
|
|
|
|
|
|
|
|
|
|
9,123136 |
|
|
|
5,12 |
270,6315 |
67,1710 |
0,0000 |
0,0000 |
|
|
|
|
|
|
|
|
|
|
|
|
9,352 |
|
|
|
5,12 |
270,6315 |
67,1710 |
0,0000 |
0,0000 |
|
|
|
|
|
|
|
|
|
|
|
|
9,608 |
-0,3643 |
0,1106 |
-0,4749 |
5,12 |
270,6315 |
67,1710 |
-91,1619 |
-130,4906 |
|
|
|
|
|
|
|
|
|
|
|
|
9,864 |
|
|
|
5,12 |
270,6315 |
67,1710 |
0,0000 |
0,0000 |
|
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|
|
|
|
|
|
|
|
|
|
10,12 |
-0,4634 |
-0,1074 |
-0,5714 |
5,12 |
270,6315 |
67,1710 |
-132,6248 |
-163,7922 |
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|
4.4.) Obliczenie stanu granicznego nośności. |
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|
4.4.1.) Przęsło skrajne. |
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|
4.4.1.1.) Przekrój w przęśle. |
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|
Beton B20 |
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|
570 |
600 |
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|
Typ przekroju - prostokątny. |
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|
Msd max= |
134,265 |
kNm |
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Ilość zbrojenia : |
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|
b=300 |
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Sb= |
Msd/(a*fcd*bw*d2) |
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Sb= |
#REF! |
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Msd= |
134,27 |
kNm |
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Stąd x= |
1-(1-2*sb)1/2 |
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beff= |
300,00 |
mm |
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Stąd x= |
#REF! |
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fcd= |
#REF! |
N/mm2 |
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Stal klasy III --- fyd= |
|
#REF! |
N/m2 |
|
a= |
0,85 |
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z= |
sb/x |
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d= |
570,00 |
mm |
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|
z= |
#REF! |
> zefflim = |
0,530 |
dla A III |
fyd= |
#REF! |
N/mm2 |
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AS1= |
Msd*1000000/(z*fyd*d) |
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f= |
16,00 |
mm |
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AS1= |
#REF! |
mm2 |
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Przyjęto zbrojenie 4f14 o As1= |
|
|
616,0 |
mm2 |
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|
4.4.1.2.) Przekrój nad podporą pośrednią B. |
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Msd= |
173,53 |
kNm |
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a= |
0,85 |
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fcd= |
#REF! |
N/mm2 |
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d= |
570,00 |
mm |
|
540 |
600 |
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beff= |
300,0 |
mm |
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Sb= |
Msd*1000000/(a*fcd*beff*d2) |
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Sb= |
#REF! |
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Stąd x= |
1-(1-2*sb)1/2 |
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a
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Stąd x= |
#REF! |
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b=300 |
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Przekrój pojedyńczo zbrojony. |
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|
Stal klasy III --- fyd= |
|
#REF! |
N/m2 |
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z= |
sb/x |
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z= |
#REF! |
> zefflim = |
0,530 |
dla A III |
|
Msd= |
173,53 |
kNm |
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AS2= |
Msd*1000000/(z*fyd*d) |
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fyd= |
#REF! |
N/m2 |
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AS2= |
#REF! |
mm2 |
|
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d= |
570,00 |
mm |
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|
Przyjęto zbrojenie górne nad podp. B 4f16 o As1= |
|
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|
804 |
mm2 |
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|
4.4.2.) Przęsło drugie. |
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4.4.2.1.) Zbrojenie na zginanie. |
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Msd max= |
77,132 |
kNm |
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Ilość zbrojenia : |
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Sb= |
Msd/(a*fcd*beff*d2) |
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|
570 |
600 |
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Sb= |
#REF! |
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|
Stąd x= |
1-(1-2*sb)1/2 |
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|
Stąd x= |
#REF! |
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|
Stal klasy III --- fyd= |
|
#REF! |
N/m2 |
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b=300 |
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z= |
sb/x |
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|
z= |
#REF! |
> zefflim = |
0,530 |
dla A III |
|
Msd= |
77,13 |
kNm |
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|
beff= |
300,00 |
mm |
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|
AS1= |
Msd*1000000/(z*fyd*d) |
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|
fcd= |
#REF! |
N/mm2 |
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AS1= |
#REF! |
mm2 |
|
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a= |
0,85 |
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d= |
570,00 |
mm |
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|
Przyjęto zbrojenie 4f12 o As1= |
|
|
452,0 |
mm2 |
fyd= |
#REF! |
N/m2 |
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|
Przekrój przy podporze C: |
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a= |
0,85 |
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|
Msd max= |
135,823 |
kNm |
|
fcd= |
#REF! |
N/mm2 |
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d= |
570,00 |
mm |
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Sb= |
Msd*1000000/(a*fcd*beff*d2) |
|
|
beff= |
300,00 |
mm |
|
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Sb= |
#REF! |
|
|
fyd= |
#REF! |
N/mm2 |
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|
Stąd x= |
1-(1-2*sb)1/2 |
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Stąd x= |
#REF! |
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|
Stal klasy III --- fyd= |
|
#REF! |
N/m2 |
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z= |
sb/x |
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z= |
#REF! |
> zefflim = |
0,530 |
dla A III |
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|
AS1= |
Msd*1000000/(z*fyd*d) |
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AS1= |
#REF! |
mm2 |
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|
Przyjęto zbrojenie górne nad podpora C 4f14 o As1= |
|
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|
616 |
mm2 |
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|
4.4.1.3.) Zbrojenie na ścinanie: |
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Vsd= |
2*fctd*b*d |
kN |
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fctd= |
0,87 |
N/mm2 |
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Vsd= |
297540 |
N |
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b= |
300,00 |
mm |
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Vsd= |
297,54 |
kN |
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d= |
570,00 |
mm |
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|
Jeżeli siła tnąca nie przekracza Vsd>VSD to należy stosować co najmniej 4 strzemiona. |
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130 |
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20 50
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600 |
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45o |
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Maksymalny odstęp strzemion Smax |
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Vsd<= |
1/5Vrd2 |
Smax= |
0,8d<=300mm |
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|
1/5Vrd2<Vsd<= |
2/3Vrd2 |
Smax= |
0,6d<=300mm |
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Vsd> |
1/3Vrd2 |
Smax= |
0,3d<=200mm |
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VRd2=bw*z*(g*fcd)/(ctgO+ctgO) |
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Wspołczynnik efektywny: |
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n= |
0,7-fck/200>=0,5 |
|
|
B20 Stąd fck= |
16,0 |
N/mm |
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n= |
0,62 |
>0,5 |
|
d= |
570,000 |
m |
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|
k= 1,6-d |
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As1= |
804,0 |
mm2 |
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k= |
1,0 |
<1 |
|
d= |
0,570 |
m |
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|
Przyjmuję k = 1 |
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Efektywny stopień zbrojenia: |
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|
rL= |
As1/bw*d |
|
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d= |
570,000 |
m |
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rL= |
0,005 |
|
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As1= |
804,0 |
mm2 |
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bw= |
300,000 |
m |
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|
Nośnośc przekroju bez zbrojenia. |
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|
|
trd= |
0,22 |
N/mm2 |
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|
VRd1= |
(k*trd(1,2+4,0*rL))*bw*d |
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rL= |
0,005 |
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|
VRd1= |
45851,52 |
N |
|
k= |
1,00 |
|
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d= |
570,0 |
mm |
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|
|
VRd1= |
45,85 |
kN<VsdAk= |
201,15 |
kN |
bw= |
300,0 |
mm |
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Nośnośc przekroju zbrojonego strzemionami. |
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n= |
0,62 |
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VRd2= |
bw*z*g*fcd/(cotO+tgO) |
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bw= |
300,0 |
mm |
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VRd2= |
#REF! |
kN |
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d= |
570,0 |
mm |
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VRd2> |
Vsdmax = |
201,1524 |
kN |
fcd= |
#REF! |
N/mm2 |
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z=0,9*d= |
513,0 |
mm |
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O= |
44o59'59'' |
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1/5Vrd2<Vsd<= |
2/3Vrd2 |
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Vsdmax = |
201,1524 |
kN |
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#REF! |
kN<Vsd<= |
#REF! |
kN |
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Smax= |
0,6d<=300mm |
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S |
<=300mm |
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Smax= |
342,0 |
mm |
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Przyjęto strzemiona czterocięte ze stali A-I dla której fywd= |
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210 |
N/mm |
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Strzemiona f8 o Asw1= |
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201,0 |
mm2 |
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4.4.2.)Nośność na przebicie elementów nie zbrojonych: |
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Nosność elementów niezbrojonych na przebicie obciążonych w sposób ciagły. |
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Nsd-(go+po)*A<= Nfd= fctd*up*d |
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A- |
pole powierzchni odciętej przekrojami przebicia |
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A= |
742800 |
mm2 |
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q,p- |
obciążenie równomierne (stałe + zmienne) |
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qo+po= |
65,977 |
kN/m |
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po= |
13,1193432 |
kN/m |
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qo= |
52,858 |
kN/m |
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Up- |
średnia arytmetyczna obwodow na która działa siła i powierzchni powstajacej |
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w poziomie zbrojenia przy założeniu sił pod katem 45o |
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Up= |
(up1+up2)/2 |
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Up= |
2476,00 |
mm |
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d- |
wysokość użyteczna |
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d= |
570,00 |
mm |
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Nsd= |
201,15 |
kN |
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fctd= |
0,87 |
N/mm2 |
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Max. siła ścinająca. |
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Nsd-(go+po)*A<= Nfd= fctd*up*d |
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(go+po)= |
65,98 |
kN/m |
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Nsd-(go+po)*A= |
152,14460879304 |
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A= |
742800,0 |
mm2 |
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Nfd= fctd*up*d |
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up= |
2476,00 |
mm |
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Nfd= |
1227,8 |
kN |
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d= |
570,00 |
mm |
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152,14 |
kN<= Nfd= |
1227,85 |
kN |
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fctd= |
0,87 |
N/mm2 |
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Nośnośc na przebicie jest zapewniona. |
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4.5.) Sprawdzenie SGU. |
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4.5.1.) Sprawdzenie zarysowań (rysy prostopadłe). |
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Wk= b*srm*e sm |
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Dla b= |
300,0 |
mm=<300 |
b= |
1,3 |
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Aceff= |
2,5*a*b |
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a= |
30,00 |
mm |
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Aceff= |
22500,0 |
mm2 |
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b= |
300,00 |
mm |
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rr = |
As/Aceff |
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As= |
804,0 |
mm2 |
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rr = |
0,036 |
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Aceff= |
22500,0 |
mm2 |
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k1= |
0,8 |
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srm= |
50+0,25*k1*k2*f/rr |
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k2= |
0,5 |
el. zgin. |
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srm= |
72,4 |
mm |
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f= |
8,00 |
mm |
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Wc= |
b*h2/6 |
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h= |
600,00 |
mm |
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Wc= |
245*105 |
mm3 |
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b= |
300,00 |
mm |
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Mcr= |
fctm*Wc |
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fctm= |
1,90 |
N/mm2 |
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Mcr= |
46550000 |
Nmm |
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Wc= |
245*105 |
mm3 |
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Mcr= |
46,55 |
kNm |
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Msd= |
173,529 |
kNm |
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ssr/ss= |
Mcr/Msd |
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Msdk= |
0,8*Msd |
kNm |
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ssr/ss= |
0,335 |
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Msdk= |
138,82 |
kNm |
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bw |
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b1= |
1,0 |
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e sm= |
ss/Es*[1-b1*b2(ssr/ss)2] |
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b2= |
0,5 |
obc. dług. |
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e sm= |
#REF! |
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ss=fyd= |
#REF! |
N/mm2 |
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Es= |
205000 |
N/mm2 |
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ssr/ss= |
0,335 |
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Wk= b*srm*e sm |
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b= |
1,3 |
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Wk= |
#REF! |
mm |
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srm= |
72,4 |
mm |
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e sm= |
#REF! |
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Wk= |
#REF! |
mm<Wlm= |
0,3mm |
Warunek sprawdzony. |
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4.5.2)Rysy ukośne. |
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wk=4*t2*l/(rw*Es*fck) |
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Vsd=34,438*5,12/2 |
wojciech koczan:
tutaj 2,323 biorę mnożąc obciążenia stałe przez 0,61m
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siła od komb. od obc. długotrwałych |
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Vsd= |
221,829 |
kN |
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t=Vsd/(bw*d) |
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t=91,57kN/(300mm*570mm) |
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t= |
1,30 |
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rw=rw1+rw2 |
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Suma stopni zbrojenia strzemionami i pr.odgietymi |
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rw1=Asw1/(bw*s) |
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rw1=201,0/(300*170) |
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rw1= |
0,004 |
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rw2=0 |
- belka nie jest zbrojona prętami odgiętymi |
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rw=rw1=0,004 > rwmin=0,0015 |
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l=1/(3*(rw1/(b1*f1)+rw2/(b2*f2))) |
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l=1/(3*(0,004/(1,0*8)) |
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l= |
666,67 |
mm |
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b1=1,0 -dla prętów gładkich |
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f1=8mm |
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wk=4*t2*l/(rw*Es*fck) |
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wk=4*0,542*666,67/(0,004*205000*16) |
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wk= |
0,059 |
mm<wklim=0,3mm |
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O.K. |
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1.5.3.)Sprawdzenie ugięcia. |
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a(oo,to)=ak*Msd*l2eff/B(oo,to) |
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Msk =(pk+gk)*k*leff2 |
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k= |
0,080 |
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Msk = |
83,3066162139955 |
kNm |
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l= |
5,120 |
m |
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ak= |
5/48 = |
0,104 |
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pk= |
10,933 |
kN/mb |
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gk= |
44,048 |
kN/mb |
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leff= |
4,35 |
m |
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b1= |
1,0 |
pr. gładkie |
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b2= |
0,5 |
obc. dług. |
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ssr/ss= |
Mcr /Msd= |
0,335 |
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Ac= |
bw*h |
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h= |
600,00 |
mm |
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Ac= |
180000 |
mm2 |
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bw= |
300,00 |
mm |
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u= |
2*bw+2*h |
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u= |
1800 |
mm |
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2*Ac/u= |
200,00 |
mm |
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F(oo,to)=2,5 |
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Ec,eff=Ecm/(1+F(oo,to)) |
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Ec,eff= |
7,86 |
kN/mm2 |
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Dla obciażenia dzałającego długotrwale |
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Dla przekroju niezarysowanego: |
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B20 - Ecm=27,5 kN/mm2 |
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beff= |
300,0 |
mm |
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ae=Es/Eceff |
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h= |
600,00 |
mm |
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ae= |
26,09 |
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bw= |
300,00 |
mm |
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B(oo,to)=Ec,eff*II |
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As1= |
804,0 |
mm2 |
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Ec,eff=27,5 kN/mm2 |
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Ec,eff= |
7857,1 |
N/mm2 |
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ae=Es/Eceff |
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Es= |
205000 |
N/mm2 |
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ae= |
26,09 |
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a= |
wojciech koczan:
grubość nadbetonu
30 |
mm |
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b= |
300,0 |
mm |
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xeff= |
fyd*As1/(a*fcd*bw) |
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h= |
600,0 |
mm |
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xeff= |
#REF! |
mm |
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fyd= |
#REF! |
N/mm2 |
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fcd= |
#REF! |
N/mm2 |
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Ac= |
h*b |
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As1= |
616,0 |
mm2 |
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Ac= |
1800,00 |
cm2 |
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a= |
0,85 |
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a= |
30 |
mm |
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II= |
((bw*h3)/12)+ae*As1*(0,5h-a)2 |
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II= |
5404339440 |
mm4 |
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Moment bezwładności dla przekroju zarysowanego: |
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xeff= |
#REF! |
mm |
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III= |
((bw*xeff3)/12)+bw*xeff*(0,5h-0,5xeff)2+ae*As1*(0,5h-a)2 |
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b= |
300,0 |
mm |
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h= |
600,0 |
mm |
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III= |
#REF! |
mm4 |
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As1= |
616,0 |
mm2 |
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a= |
wojciech koczan:
grubość
otuliny
30 |
mm |
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ssr/ss= |
Mcr /Msd= |
wojciech koczan:
z rys
0,335 |
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b= |
300,00 |
mm |
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h= |
600,00 |
mm |
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B(oo,to)= |
#REF! |
kN/mm2 |
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AsI= |
616,0 |
mm2 |
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Eceff= |
7857,1 |
N/mm2 |
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leff= |
4,4 |
m |
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a(oo,to)= |
ak*Msd*leff2/B(oo,to) |
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B(oo,to)= |
#REF! |
kN/mm2 |
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ak= |
0,104 |
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a(oo,to)= |
#REF! |
mm < alim= leff/200 = |
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21,76 |
mm |
Msk= |
83,307 |
kNm |
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#REF! |
mm< |
21,76 |
mm |
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Warunek został spełniony. |
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POZ.5. SŁUP. |
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WOJCIECH KOCZAN:UWAŻAJ- jaką przyjmujesz srednicę prętów w słupie i stopie fundamentowej-PATRZ NOTATKI
( PROF. WOLIŃSKI)
KOMENATRZ |
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5.1.) Zestawienie obciążeń. |
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Obciążenie obliczeniowe stropodachu |
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gk [kN] |
gf |
go [kN] |
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Pokrycie papowe 0,2*0,45*5,12*5,1*1/cos5,0= |
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2,35008 |
1,3 |
3,055104 |
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Wylewka 0,03*21*5,12*5,10*1/cos5,0= |
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16,45056 |
1,3 |
21,385728 |
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Płyta panwiowa 0,03*21*5,12*5,101/cos5,0= |
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26,112 |
1,1 |
28,7232 |
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Razem = |
44,91264 |
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53,164032 |
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Ciężar podciągu |
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(0,3*0,6*5,12*25) = |
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23,04 |
1,1 |
25,344 |
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Razem = |
67,95 |
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78,51 |
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Długość żebra = |
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5,1 |
m |
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Długość podciągu = |
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5,12 |
m |
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Ilość kondygnacji = |
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4 |
m |
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bw(Sł) = |
0,4 |
m |
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Wysokość kondyg.= |
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3,6 |
m |
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b) Obciążenie śniegiem (strefa I): |
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Sk = qk*c= 0,7*0,8*5,12*5,10 = |
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14,623 |
1,4 |
20,472 |
kN |
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c) Obciążenie z pozostałych kondygnacji: |
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(8,114*5,1*5,12*4 )= |
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847,49 |
kN |
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d) Ciężar własny słupa: |
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gk [kN] |
gf |
go [kN] |
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0,4*0,4*(4,0-0,5)*4*25 = |
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56 |
1,1 |
61,6 |
kN
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Obciążenie całkowite na poziomie posadzki parteru: |
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Nsd=a+b+c+d=78,51+847,49+20,472+61,6= |
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1008,07 |
kN
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Obciążenie długotrwałe: |
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Nsd,lt = Nsd-Sk-(1-yd)*pd*x = 1008,07-20,47-0,2*10*1,2*5,1*5,12 = |
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924,93 |
kN |
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5.2.) Schemat statyczny słupa: |
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5.2.1.) Długość obliczeniowa słupa: |
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Beton B20 |
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6,23 |
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Przekrój słupa. |
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(cm) |
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d=37 |
40 |
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328 |
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H= |
3,60 |
m |
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hp= |
0,62 |
m |
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h= |
40,00 |
m |
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30 |
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lcol= H-hp+0,3 |
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lcol= |
3,3 |
m |
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lo= |
0,8 * lcol = |
2,622 |
m |
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lo/h= |
2,62 / 0,4 = |
0,066 |
m <10 |
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h= |
40,00 |
m |
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lo= |
2,62 |
m |
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5.3.) Obliczenie ilości zbrojenia w słupie: |
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5.3.1.) Określenie mimośrodu: |
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eo= |
ee+ ea |
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Mimośród statyczny: |
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ee =0 |
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Momośród niezamierzony: |
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lo/600= |
4,37 |
mm |
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lo= |
2,62 |
m |
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eamax= |
h/30= |
13,3333333333333 |
mm |
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h= |
0,4 |
m |
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10mm |
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lo/h= |
7 |
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7<lo/h<30 |
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ea= |
13,3mm = etot |
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Wpływ smukłości. |
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eo= |
13,33 |
mm |
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ea= |
13,33 |
mm |
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h=1/[(1-Nsd/Ncrit}] |
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ee= |
0,00 |
mm |
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Ncrit= |
fcd*b*h/(lo/h)2*[(,6*Es/fyd*mo+(0,1*Ecm/fcd+(lo/ho)2*no)*2,6/(2+kit)] |
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kit= |
1+0,5*Nsd,it/Nsd*f(D,to) |
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kit= |
1,918 |
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Nsd,it= |
924,93 |
kN |
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Nsd= |
1008,07 |
kN |
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no= |
Nsd/(fcd*b2) |
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f(D,to)= |
2,00 |
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no= |
#REF! |
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fcd= |
#REF! |
N/mm2 |
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mo= |
no*eo/h |
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b= |
300 |
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mo= |
#REF! |
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eo= |
13,33 |
mm |
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eo/h>= |
(0,5-0,01*lo/h-0,001*fcd |
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h= |
400 |
mm |
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eo/h>= |
#REF! |
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lo= |
2,62 |
m |
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eo/h>= |
0,03 |
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Ncrit= |
fcd*b*h/(lo/h)2*[(1,6*Es/fyd*mo+(0,1*Ecm/fcd+(lo/ho)2*mo)*2,6/(2*kit)] |
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Ncrit= |
#REF! |
kN |
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Nsd= |
1008,07 |
kN |
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Es= |
205000,0 |
N/mm2 |
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h=1/[(1-Nsd/Ncrit}] |
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Ecm= |
27,50 |
kN/mm2 |
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h= |
#REF! |
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fcd= |
#REF! |
N/mm2 |
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h=b= |
400 |
mm |
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etot= |
eo*h |
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eo= |
13,33 |
mm |
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etot= |
#REF! |
mm |
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kit= |
1,918 |
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fyd= |
#REF! |
N/mm2 |
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5.3.3.) Wyznaczenie efektywnej strefy ściskanej: |
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etot= |
#REF! |
mm |
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es2= |
0,5*h-etot-a' |
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es2= |
#REF! |
mm |
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a'= |
30,00 |
mm |
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ea= |
13,33 |
mm |
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Nsd= |
1008,07 |
kN |
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a= |
0,85 |
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es2= |
#REF! |
mm |
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fcd= |
#REF! |
N/mm2 |
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d= |
370,00 |
mm |
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xeff= |
#REF! |
mm<h=300 |
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a'= |
30,00 |
mm |
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xeff/d= |
#REF! |
>zeff,lim=0,53 |
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Mimośród mały |
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5.3.4.)Określenie ilości zbrojenia: |
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es1=0,5*b-a+etot |
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es1=0,5*300-30,0+10,71= |
130,0 |
mm |
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Nsd= |
1008,07 |
kN |
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a= |
0,85 |
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As1=As2= |
#REF! |
mm2 |
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etot= |
#REF! |
mm |
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fcd= |
10,60 |
N/mm2 |
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As1=As2= |
#REF! |
cm2 |
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d= |
370,00 |
mm |
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a'= |
0,00 |
mm |
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Przyjęto zbrojenie 4f16o As1= |
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8,04 |
cm2 |
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xeff= |
#REF! |
mm |
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fyd= |
#REF! |
N/mm2 |
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5.3.4.) Rozstaw strzemion w słupie. |
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b= |
400,0 |
mm |
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rl= |
As1/(b*d) |
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As1= |
8,04 |
cm2 |
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rl= |
0,01 |
<3% |
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d= |
370,00 |
mm |
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STR 162 -PN
Przyjęto strzemiona dwucięte f 8 co 20 cm ,a przy końcach słupa 10cm. |
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POZ. 6. STOPA FUNDAMENTOWA. |
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Nsd |
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6.1.) Schemat stopy. |
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Nsd= |
1008,07 |
kN |
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Warunki gruntowe: |
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Pd |
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mw |
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ID=0,42 |
f= 30o |
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G
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6.2.). Określenie wymiarów stopy: |
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60 |
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Nsd= |
1008,07 |
kN |
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r= |
1,65 |
kN/m3 |
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Głębokość posadowienia: D= |
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1,50 |
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NR,sd= |
Nsd+Gst+Ggr+q*B2 |
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Gst+Ggr= |
m*hf*B2*gśr*1,2 |
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Gst+Ggr= |
1,5*B2*22,8*1,2 |
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NR,sd= |
1008,07+41,04B2 |
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Cu=0 |
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Opór gruntu: |
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qr= |
(1+0,3*B/L)Nc*Cu(r)+(1+1,5B/L)ND*D*rB(r)*g+(1-0,25B/L)NB*rB(r)B*g |
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Nc= |
30,14 |
ND= |
18,4 |
NB= |
7,53 |
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qr= |
1104+93,18*B |
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qr=Nr,sd/B2<m*qr |
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1008,07/B2+41,04<894,2+75,48*B |
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B=1,20m |
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782,31 |
kN/m2 < |
984,78 |
kN/m2 |
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1,2 |
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C.N.U. |
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40 |
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A |
40 |
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A |
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30 |
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Sredni obliczeniowy odpór gruntu: |
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qsd=Nrsd/B2= |
782,67 |
kN/m2 |
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a= |
0,05 |
m |
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A-A |
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Nsd= |
1008,07 |
kN |
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L=B= |
1,20 |
m |
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gsd= |
782,67 |
kN/m2 |
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Ma= |
105,66 |
kNm |
ds=55 |
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fyd= |
21,5 |
kN |
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h=60 |
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As=M/(0,9*h*fyd)= |
8,15 |
cm2 |
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Stal kl A-I |
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Przyjęto zbrojenie prętami 10 |
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f 12 o Asw= |
10,17 |
cm2 |
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Rozstaw prętów co 150mm |
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5.3.) Obliczenie stopy na przebicie. |
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Nsd -A*gro<=NRd |
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Nsd= |
1008,07 |
kN |
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up= |
(u1+u2)/2 |
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d= |
55,00 |
m |
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up= |
300,00 |
m |
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fctd= |
0,87 |
N/mm2 |
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NRd= |
fctd*up*d |
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u1= |
160,00 |
m |
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NRd= |
14355,00 |
kN |
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u2= |
440,00 |
m |
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Nsd= |
1008,07 |
kN |
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Nsd -A*gro<=NRd |
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gro= |
782,67 |
kN/m2 |
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Nsd - A * gro = |
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-118,98 |
kN<=NRd= |
14355,00 |
kN |
A= |
1,44 |
m2 |
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Warunek spełniony. |
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Napreżenia wychodzą poza podstawe ,czyli |
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nie było potrzeby sprawdzania na przebicie. |
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a= |
45o |
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1,2 |
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