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POZ. 1. BELKA. |
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1.1). Zestawienie obciążeń. |
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1.1.1). Obciążenia stałe. |
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gk [kN/m2] |
gf |
go [kN/m2] |
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Parkiet mozaikowy o grub. 9mm (0.09) |
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0,09 |
1,3 |
0,117 |
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Wylewka wyrównująca cementowa |
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0,42 |
1,3 |
0,546 |
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o grub. 2cm 0,02 * 2,10 |
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Styropian 3cm 0,03* 0,45 |
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0,014 |
1,3 |
0,018 |
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Strop Akermana,wysokość pustaka 20cm |
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2,88 |
1,1 |
3,168 |
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2,88 |
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Tynk cementowo-wapienny 0,015m |
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0,28 |
1,3 |
0,364 |
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0,015*19,0 |
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S= |
3,684 |
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4,213 |
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1.1.2). Obciążenia zmienne. |
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pk [kN/m2] |
gf |
po [kN/m2] |
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Obciążenia technologiczne |
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2,0 kN/m2 |
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2,0 |
1,3 |
2,6 |
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Obciążenia zastępcze od ścianek |
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działowych. |
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1,790 |
1,4 |
2,506 |
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S= |
3,790 |
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5,106 |
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Ciężar ścianki działowej Q (płyta gips.-welna mineralna-płyta gips.): |
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Q = ( 0,02*12 ) *2+ ( 0,05*1,0 ) = |
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0,53 |
kN/m2 < 2,5kN/m2 |
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hs = |
3,8 m >2,65m |
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Obciążenie zastępcze wynosi: 1,25 * 3,8 / 2,65 m = |
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1,790 |
kN/m2 |
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1.1.3.).Obciążenia całkowite. |
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gk = |
gk + pk |
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gk = |
(3,79 + 3,68)kN/m2 = |
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7,474 |
kN/m2 |
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go = |
go + po |
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go = |
(5,106+4,213)kN/m2= |
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9,319 |
kN/m2 |
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1.2.) Obciążenie belki stropowej: |
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gk= |
gk*0,31 |
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gk= |
3,684 |
kN/mb |
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gk= |
1,142 |
kN/mb |
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go= |
4,213 |
kN/mb |
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go= |
go*0,31 |
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pk= |
3,790 |
kN/mb |
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go= |
1,306 |
kN/mb |
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po= |
5,106 |
kN/mb |
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pk= |
pk*0,31 |
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pk= |
1,175 |
kN/mb |
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po= |
po*0,31 |
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po= |
1,583 |
kN/mb |
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1.3) Schemat statyczny. |
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Obciążenie stałe |
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go= |
1,306 |
kN/mb |
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Obciążenie zmienne |
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po= |
1,583 |
kN/mb |
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go |
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L1= |
5,50 |
m |
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5500,00 |
mm |
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5,50 |
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2,00 |
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5,50 |
L2= |
2,00 |
mm |
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L2= |
2000,00 |
mm |
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1.4.1)Schemat belki. |
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A
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B
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B
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1.4.2.)Efektywna szerokość współpracująca. |
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310 |
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beff= |
bw+l0/5<=b=0,31m |
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beff= |
295 |
mm=0,29m<0,31m |
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beff= |
310 |
mm |
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l0= |
0,15*(L1+L2) |
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240,0 |
210,0 |
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l0= |
1125 |
mm |
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bw= |
70,0 |
mm |
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hf= |
30,0 |
mm |
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b= |
310,0 |
mm |
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h= |
240,0 |
mm |
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d= |
210,0 |
mm |
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.1.4.3.) Nośność przekroju na zginanie. |
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1.4.3.1.) Sprawdzenie typu przekroju. |
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Msd= |
7,740 |
kNm = |
7740000 |
Nmm |
d= |
210,00 |
mm |
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Mht=a*fcd*beff*hf*(d-0,5hf) |
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hf= |
30,00 |
mm |
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Mht= |
16339635 |
Nmm |
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beff= |
310 |
mm |
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Mht= |
16,340 |
kNm |
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fcd= |
10,60 |
N/mm2 |
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a= |
0,85 |
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Msd= |
7,740 |
kNm<Mht= |
16,340 |
kNm - Przekroj pozornie teowy. |
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1.4.4.) Obliczenie nośności przekroju 1-1. |
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Sb= |
Msd/(a*fcd*beff*d2) |
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Msd= |
7,46 |
kNm |
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Sb= |
0,061 |
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beff= |
310,00 |
mm |
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Stąd z= |
0,968 |
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fcd= |
10,60 |
N/mm2 |
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Stal klasy III --- fyd= |
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350,0 |
N/m2 |
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a= |
0,85 |
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z= |
0,065 |
< zefflim = |
0,530 |
dla A III |
d= |
210,00 |
mm |
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AS1= |
Msd*1000000/(z*fyd*d) |
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fyd= |
350,00 |
N/m2 |
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AS1= |
104,852 |
mm2 |
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f= |
12,00 |
mm |
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Przyjęto zbrojenie 1f12 o As1= |
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113,0 |
mm2 |
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1.4.5.)Obliczanie nośności przekroju A-A i B-B (na zginanie). |
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Msd= |
7,740 |
kNm |
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Sb= |
Msd*1000000/(a*fcd*beff*d2) |
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a= |
0,85 |
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Sb= |
0,0628 |
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fcd= |
10,60 |
N/mm2 |
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Stąd z= |
0,967 |
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beff= |
310,00 |
mm |
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AS1= |
Msd*1000000/(z*fyd*d) |
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d= |
210,00 |
mm |
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AS1= |
108,900 |
mm2 |
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fyd= |
350,00 |
N/m2 |
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Przyjęto zbrojenie 1f12 o As1= |
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113,0 |
mm2 (ze względu na rozwarcie rys prostopadłych). |
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1.4.6.) Zbrojenie na ścinanie: |
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a= |
45 Stąd |
ctga=1 |
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L1= |
5,500 |
m |
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O= |
44 59' 59'' |
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L2= |
2,000 |
m |
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leff= |
(L1+L2)/2 |
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leff= |
3,75 |
m |
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VsdA= |
9,27 |
kN |
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q0= |
2,889 |
kN/m |
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VsdAkr= |
VsdA-qo*ai |
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ai= |
0,255 |
m |
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VsdAkr= |
8,533 |
kN |
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ai= |
t/2 |
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t= |
510 |
mm |
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ai= |
255,0 |
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/mm |
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n= |
0,62 |
>0,5 |
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d= |
0,210 |
m |
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k= 1,6-d |
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As1= |
113,0 |
mm2 |
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k= |
1,39 |
>1 |
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bw= |
70,0 |
mm |
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rL= |
As1/bw*d |
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d= |
210,0 |
mm |
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rL= |
0,0077 |
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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= |
5532,53 |
N |
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rL= |
0,0077 |
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VRd1= |
5,53 |
kN |
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k= |
1,39 |
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VRd1= |
5,53 |
kN<VsdAkr= |
8,533 |
kN |
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d= |
210,0 |
mm |
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bw= |
70,0 |
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= |
70,0 |
mm |
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VRd2= |
43,47 |
kN |
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d= |
210,0 |
mm |
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z=0,9*d= |
189,0 |
mm |
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fcd= |
10,60 |
N/mm2 |
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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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f 6,0 o Asw= |
28,30 |
mm2 |
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z= |
189,00 |
mm |
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c= |
(VsdAkr-VRd1)/q |
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VsdAkr= |
8,53 |
kN |
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c= |
1039 |
mm |
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cotO= |
1,00 |
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c>3*d= |
630,0 |
mm |
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VRd1= |
5,53 |
kN |
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q= |
2,889 |
kN/m |
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d= |
210,0 |
mm |
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Odcinek c podzielono na dwie części: |
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c1= |
520,0 |
mm |
< 3*d= |
630,0 |
mm |
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c2= |
519,0 |
mm |
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Przyjęto że ścinanie zostanie przeniesione na c1 i c2 przez strzemiona pionowe. |
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Vsd2= |
VsdAkr-q*c1 |
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VsdAkr= |
8,533 |
kN |
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Vsd2= |
7,03 |
kN |
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q= |
2,889 |
kN/m |
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c1= |
0,52 |
m |
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VRd3= |
(Asw1/s1)*z*fywd*cotO>= |
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Vsd2 |
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Asw= |
28,30 |
mm2 |
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VRd3= |
7031,2183625 |
kN |
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z= |
189,0 |
mm |
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warunek spełniony |
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s1= |
Asw*z*fywd*cotO/Vsd2 |
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s1<= |
160 |
mm |
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Przyjmuję s1= |
120 |
mm |
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Sprawdzenie warunku normowego: |
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bw= |
70,0 |
mm |
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Asw1*fywd/bw*s1<=0,5*n*fcd |
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Asw1= |
28,30 |
mm2 |
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fywd = |
210 |
N/mm |
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0,708 |
<0,5*n*fcd= |
3,29 |
N/mm2 |
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n= |
0,62 |
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fcd= |
10,60 |
N/mm2 |
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Warunek spelniony. |
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Odcinek c1 |
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Vsds1=VRd3= |
(Asw1/s1)*z*fywd*cotO |
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VsdAkr= |
8,533 |
kN |
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Vsds1=VRd3= |
9,36 |
kN |
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q= |
2,889 |
kN/m |
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Vsds1=VRd3> |
VsdAkr= |
8,533 |
kN |
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Asw= |
28,30 |
mm2 |
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z= |
189,0 |
mm |
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fywd = |
210 |
N/mm |
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VsdAkr |
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VRd,1 |
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1.5.) Sprawdzenie SGU. |
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1.5.1.) Sprawdzenie zarysowań. |
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1.5.1.1.)Rysy prostopadłe. |
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Wk= b*srm*e sm |
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Dla b= |
70,0 |
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= |
5250,0 |
mm2 |
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b= |
70,00 |
mm |
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rr = |
As/Aceff |
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As= |
113,0 |
mm2 |
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rr = |
0,022 |
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Aceff= |
5250,0 |
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= |
105,8 |
mm |
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f= |
12,00 |
mm |
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Wc= |
b*h2/6 |
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h= |
240,00 |
mm |
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Wc= |
672000,0 |
mm3 |
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b= |
70,00 |
mm |
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Mcr= |
fctm*Wc |
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fctm= |
1,90 |
N/mm2 |
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Mcr= |
1276800 |
Nmm |
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Wc= |
672000,0 |
mm3 |
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Mcr= |
1,28 |
kNm |
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ssr/ss= |
Mcr/Msd |
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Msd= |
7,46 |
kNm |
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ssr/ss= |
0,171 |
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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= |
0,0009 |
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ss=fyd= |
350,00 |
N/mm2 |
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Es= |
205000 |
N/mm2 |
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Wk= b*srm*e sm |
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b= |
1,3 |
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Wk= |
0,117 |
mm |
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srm= |
105,8 |
mm |
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e sm= |
0,0009 |
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Wk= |
0,117 |
mm<Wlim= |
0,3mm |
Warunek sprawdzony. |
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1.5.2.)Sprawdzenie ugięcia. |
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a(oo,to)=(aI-aII)+aIII |
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a(oo,to)=ak*Msd*l2eff/B(oo,to) |
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- dla aI od obciążenia chrakterystycznego pk , B - dla przekroju obciążonego doraźnie |
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Msk =(pk+gk)*k*leff2 |
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k= |
0,080 |
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Msk = |
4,051 |
kNm |
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l= |
5,500 |
m |
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ak= |
5/48 = |
0,104 |
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pk= |
1,175 |
kN/mb |
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gk= |
1,142 |
kN/mb |
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leff= |
0,85 * l = |
4,675 |
m |
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dla przekroju zarysowanego: |
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B(oo,to)=Ec,eff*II |
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Ec,eff=Ecm |
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B20 - Ecm=27,5 kN/mm2 |
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Ec,eff=27,5 kN/mm2 |
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ae=Es/Eceff |
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Ec,eff= |
27500,0 |
N/mm2 |
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ae= |
7,45 |
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Es= |
205000 |
N/mm2 |
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a= |
30 |
mm |
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b= |
70,00 |
mm |
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h= |
240,00 |
mm |
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AsI= |
113,0 |
mm2 |
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II= |
87463145,4545455 |
mm4 |
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Eceff= |
27,5 |
kN/mm2 |
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B(oo,to)=Ec,eff*II |
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ak= |
0,104 |
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B(oo,to)= |
2,41*109 |
kN/mm2 |
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Msd = |
4,051 |
kNm |
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l= |
5,500 |
m |
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aI=ak*Msd*leff2/B(oo,to) |
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leff= |
4,675 |
m |
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aI= |
3,827 |
mm |
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B(oo,to)= |
2,41*109 |
N/mm2 |
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- dla aII od obciążenia długotrwałego gk , B - dla przekroju zarysowanego |
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Msd=gk*k*l2 |
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k= |
0,080 |
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Msd= |
2,763 |
kNm |
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l= |
5,500 |
m |
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ak= |
0,104 |
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gk= |
1,142 |
kN/mb |
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dla przekroju zarysowanego: |
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B(oo,to)=Ec,eff*II |
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Ec,eff=Ecm/(1+F(oo,to)) |
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B20 - Ecm=27,5 kN/mm2 |
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F(oo,to)=3,2 |
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Es= |
205000 |
N/mm2 |
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Ec,eff= |
6,55 |
kN/mm2 |
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ae=Es/Eceff |
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ae= |
31,31 |
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a= |
30 |
mm |
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b= |
70,00 |
mm |
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h= |
240,00 |
mm |
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II= |
1,09*108 |
mm4 |
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AsI= |
113,0 |
mm2 |
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B(oo,to)=Ec,eff*II |
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II= |
1,09*108 |
mm4 |
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B(oo,to)= |
7,14*108 |
kN/mm2 |
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Eceff= |
6,548 |
kN/mm2 |
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ak= |
0,104 |
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aII=ak*Msd*leff2/B(oo,to) |
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Msd= |
2,763 |
kNm |
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aII= |
8,811 |
mm |
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leff= |
4,675 |
m |
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B(oo,to)= |
7,14*108 |
kN/mm2 |
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- dla aIII od obciążenia długotrwałego gk , B - dla przekroju zarysowanego |
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Eceff=Ecm/(1+f(oo ,to)) |
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Ecm= |
27,50 |
kN/mm2 |
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Eceff= |
6,55 |
kN/mm2 |
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f(oo ,to)= |
3,2 |
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ae=Es/Eceff |
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Es= |
205000 |
N/mm2 |
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ae= |
31,31 |
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Eceff= |
6,55 |
kN/mm2 |
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a= |
30 |
mm |
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b= |
70,00 |
mm |
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h= |
240,00 |
mm |
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AsI= |
113,0 |
mm2 |
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II= |
1,09*108 |
mm4 |
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a= |
0,85 |
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fyd= |
350,0 |
kN/mm2 |
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xeff= |
fyd*As/(fcd*a*bw) |
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fcd= |
10,6 |
kN/mm2 |
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xeff= |
62,71 |
mm |
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ae= |
31,31 |
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AsII= |
113,0 |
mm2 |
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a= |
30 |
mm |
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b= |
70,00 |
mm |
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h= |
240,00 |
mm |
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III= |
64589314,0258934 |
mm4 |
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dla B-20 fctm= |
1,9 |
N/mm2 |
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ssr/ss= |
Mcr/Msd |
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Wc= b*h2/6= |
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672000 |
mm3 |
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Mcr= |
fctm*Wc |
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Mcr= |
1276800 |
Nmm |
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Msd= |
2,763 |
kNm |
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Mcr= |
1,2768 |
kNm |
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ssr/ss= |
Mcr /Msd= |
0,462 |
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b1= |
1,0 |
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b2= |
0,5 |
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III= |
64589314 |
mm4 |
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II= |
1,09*108 |
mm4 |
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Eceff= |
6,55 |
kN/mm2 |
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ak= |
0,104 |
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B(oo,to)= |
4,42*108 |
kN/mm2 |
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Msd= |
2,763 |
kNm |
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leff= |
4,675 |
m |
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aIII=ak*Msd*leff2/B(oo,to) |
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B(oo,to)= |
4,42*108 |
kN/mm2 |
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aIII= |
14,233 |
mm |
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aI= |
3,827 |
mm |
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aII= |
8,811 |
mm |
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a(oo,to)= |
aI-aII+aIII |
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aIII= |
14,233 |
mm |
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a(oo,to)= |
9,249 |
mm < alim= leff/200 = |
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23,375 |
mm |
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9,249 |
mm< |
23,375 |
mm |
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Warunek został spełniony. |
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1.6.) Belka pod ścianką działową. |
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b= |
0,47 |
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0,9 |
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0,03 |
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1.6.1.) Obciążenia stałe. |
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gk [kN/m2] |
gf |
go [kN/m2] |
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Obc. Warstwami z pozycji 1.1.1. |
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0,09*(b-0,15) |
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0,029 |
1,3 |
0,037 |
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0,42*(b-0,15) |
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0,134 |
1,3 |
0,175 |
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0,0135*(b-0,15) |
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0,004 |
1,3 |
0,006 |
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0,28*(b-0,15) |
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0,090 |
1,3 |
0,116 |
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Strop Akermana |
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2,88*(b-0,18) |
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0,922 |
1,1 |
1,014 |
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Ciężar belki |
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25*0,14*0,23 |
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0,805 |
1,1 |
0,886 |
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Ciężar ściany |
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3,8*0,53 |
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2,014 |
1,1 |
2,215 |
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S= |
3,998 |
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4,449 |
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1.6.2). Obciążenia zmienne. |
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pk [kN/m2] |
gf |
po [kN/m2] |
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Obciążenia technologiczne |
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2,0*(0,47-0,13) |
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-0,9 |
1,4 |
-1,204 |
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S= |
-0,860 |
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-1,204 |
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1.6.3.).Obciążenia całkowite. |
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gk = |
gk + pk |
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gk = |
(3,998 + 0,68)kN/m2 = |
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3,138 |
kN/m2 |
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qo = |
go + po |
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qo = |
(4,449+0,952)kN/m2= |
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3,245 |
kN/m2 |
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1.6.3) Schemat statyczny. |
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Obciążenie stałe |
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qo= |
3,245 |
kN/mb |
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L1= |
5,50 |
m |
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L1= |
5500,00 |
mm |
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5,50 |
|
2,00 |
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5,50 |
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L2= |
2,00 |
m |
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L2= |
2000,00 |
mm |
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M= |
14,31 |
kNm |
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V= |
17,57 |
kN |
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1.7.)Stan graniczny nośności. |
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A |
1 |
B |
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1.7.1) Szerokość współpracująca. |
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bw= |
140,00 |
mm |
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beff= |
bw+l0/5<=b=470mm |
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l= |
5500,00 |
mm |
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beff= |
140+0,15*(5500*2)/5= |
|
426 |
mm |
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l0= |
0,00 |
mm |
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beff= |
426 |
mm |
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l0= |
0,15*(L1+L2) |
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l0= |
1125 |
mm |
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Typ przekroju - prostokątny. |
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Msd= |
14,310 |
kNm = |
14310000 |
Nmm |
d= |
210,00 |
mm |
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Mht=a*fcd*beff*hf*(d-0,5hf) |
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hf= |
30,00 |
mm |
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Mht= |
22453821 |
Nmm |
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beff= |
426 |
mm |
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Mht= |
22,454 |
kNm |
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fcd= |
10,60 |
N/mm2 |
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a= |
0,85 |
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Msd= |
14,310 |
kNm<Mht= |
22,454 |
kNm - Przekroj pozornie teowy. |
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1.7.2.) Obliczenie ilości zbrojenia dla przekroju 1-1. |
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Sb= |
Msd/(a*fcd*beff*d2) |
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Msd= |
13,66 |
kNm |
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Sb= |
0,081 |
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beff= |
426,00 |
mm |
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Stąd z= |
0,957 |
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fcd= |
10,60 |
N/mm2 |
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Stal klasy III --- fyd= |
|
350,0 |
N/m2 |
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a= |
0,85 |
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z= |
0,085 |
< zefflim = |
0,530 |
dla A III |
d= |
210,00 |
mm |
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AS1= |
Msd*1000000/(z*fyd*d) |
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fyd= |
350,00 |
N/m2 |
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AS1= |
194,201 |
mm2 |
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f= |
16,00 |
mm |
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Przyjęto zbrojenie 2f16 o As1= |
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402,0 |
mm2 |
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1.7.3.)Obliczanine ilosci zbrojnia dla przekroju A-A i B-B (na zginanie). |
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Msd= |
14,310 |
kNm |
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Sb= |
Msd*1000000/(a*fcd*beff*d2) |
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a= |
0,85 |
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Sb= |
0,085 |
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fcd= |
10,60 |
N/mm2 |
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Stąd z= |
0,955 |
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beff= |
426,00 |
mm |
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AS1= |
Msd*1000000/(z*fyd*d) |
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d= |
210,00 |
mm |
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AS1= |
203,868 |
mm2 |
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fyd= |
350,00 |
N/m2 |
|
Przyjęto zbrojenie 2f16 o As1= |
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|
402,0 |
mm2 (ze względu na rozwarcie rys prostopadłych). |
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1.7.4.) Zbrojenie na ścinanie: |
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a= |
45 Stąd |
ctga=1 |
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L1= |
5,500 |
m |
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O= |
44 59' 59'' |
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L2= |
2,000 |
m |
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leff= |
(L1+L2)/2 |
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q0= |
3,245 |
kN/m |
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leff= |
3,75 |
m |
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ai= |
0,255 |
m |
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VsdA= |
12,45 |
kN |
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t= |
510 |
mm |
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VsdAkr= |
VsdA-qo*ai |
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VsdAkr= |
11,623 |
kN |
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ai= |
t/2 |
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ai= |
255,0 |
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/mm |
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n= |
0,62 |
>0,5 |
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d= |
0,210 |
m |
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k= 1,6-d |
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As1= |
402,0 |
mm2 |
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k= |
1,39 |
>1 |
|
bw= |
140,0 |
mm |
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rL= |
As1/bw*d |
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d= |
210,0 |
mm |
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rL= |
0,0137 |
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Nośnośc przekroju bez zbrojenia. |
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VsdAkr= |
11,623 |
kN |
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VRd1= |
(k*trd(1,2+40*rL))*bw*d |
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trd= |
0,22 |
N/mm2 |
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VRd1= |
5900,72 |
N |
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rL= |
0,0137 |
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VRd1= |
5,90 |
kN |
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k= |
1,39 |
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VRd1= |
5,90 |
kN<VsAkr= |
11,623 |
kN |
d= |
210,0 |
mm |
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bw= |
140,0 |
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= |
140,0 |
mm |
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VRd2= |
86,95 |
kN |
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d= |
210,0 |
mm |
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z=0,9*d= |
189,0 |
mm |
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fcd= |
10,60 |
N/mm2 |
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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 strzem. dwucięte ze stali A-I dla której fywd = |
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210 |
N/mm |
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f6 Asw= |
56,60 |
mm2 |
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z= |
189,00 |
mm |
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c= |
(VsdAkr-VRd1)/q |
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VsdAkr= |
11,62 |
kN |
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c= |
1,76 |
m |
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cotO= |
1,00 |
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c>3*d= |
630,0 |
mm |
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VRd1= |
5,90 |
kN |
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q= |
3,245 |
kN/m |
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d= |
210,0 |
mm |
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Odcinek c podzielono na dwie części: |
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c1= |
880,0 |
mm |
< 3*d= |
630,0 |
mm |
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c2= |
880,0 |
mm |
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Przyjeto że ścinanie zostanie przeniesione na c2 przez strzemiona pionowe, a na odcinku c |
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przez strzemiona pionowe. |
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Vsd2= |
VsdAkr-q*c1 |
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VsdAkr= |
11,623 |
kN |
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Vsd2= |
8,77 |
kN |
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q= |
3,245 |
kN/m |
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VRd3= |
(Asw1/s1)*z*fywd*cotO>= |
|
Vsd2 |
c1= |
0,88 |
m |
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VRd3= |
8767,02034 |
kN |
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Asw= |
56,60 |
mm2 |
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warunek spełniony |
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s1= |
Asw*z*fywd*cotO/Vsd2 |
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z= |
189,0 |
mm |
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s1= |
256 |
mm |
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s1= |
256 |
mm > 200 mm co |
|
200,0 |
mm |
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Sprawdzenie warunku normowego: |
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bw= |
140,0 |
mm |
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Asw1*fywd/bw*s1<=0,5*n*fcd |
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Asw1= |
56,60 |
mm2 |
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fywd = |
210 |
N/mm |
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0,425 |
<0,5*n*fcd= |
3,29 |
N/mm2 |
n= |
0,62 |
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Warunek spelniony. |
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fcd= |
10,60 |
N/mm2 |
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Odcinek c1 |
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Na odcinku c1 przyj. zbroj. oraz strzemionami pionowymi o takim |
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samym rozstawie i przekroju |
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jak na odcinku c2. |
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Vsds1=VRd3= |
(Asw1/s1)*z*fywd*cotO |
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VsdAkr= |
11,623 |
kN |
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Vsds1=VRd3= |
11,23 |
kN |
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q= |
3,245 |
kN/m |
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Vsds1=VRd3> |
0,5VsdAkr= |
5,811 |
kN |
c1= |
0,88 |
m |
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|
Do przeniesienia przez pręty odgięte pozostaje: |
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c1= |
880,00 |
mm |
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Vsd01= |
VsdAkr-Vsds1 |
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Asw= |
56,60 |
mm2 |
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Vsd01= |
5,81 |
kN |
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z= |
189,0 |
mm |
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|
Zalożono dwa odgięcia na odcinku c2 |
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s2= |
c1/2 |
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a= |
189,0 |
mm |
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s2= |
440 |
mm |
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fywd = |
210 |
N/mm |
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Asw2>=(Vsd01*s2)/(a*fywd*(cotO+cota)*sina) |
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Asw2> |
45,6 |
mm |
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Przyjęto w każdym odgięciu po jednym pręcie f16 o Asw= |
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0,0 |
mm2 |
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Asw2*fywd/bw*s2<(0,5*n*fcd*sina)/(1-cosa) |
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bw= |
140,0 |
mm |
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0,0 |
< |
7,93 |
N/mm2 |
Asw1= |
56,60 |
mm2 |
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Warunek spelniony. |
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fywd = |
210 |
N/mm |
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n= |
0,62 |
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fcd= |
10,60 |
N/mm2 |
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2.8.) S.G.U. |
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2.8.1.) Sprawdzenie zarysowań. |
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Rysy prostopadłe. |
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Wk= b*srm*e sm |
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Dla b= |
70,0 |
mm < 300 |
b= |
1,3 |
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a= |
30,00 |
mm |
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Aceff= |
2,5*a*b |
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b= |
70,00 |
mm |
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Aceff= |
5250,0 |
mm2 |
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As= |
0,0 |
mm2 |
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r1= |
As/Aceff |
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k1= |
0,8 |
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r1= |
0,000 |
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k2= |
0,5 |
el. zgin. |
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srm= |
50+0,25*k1*k2*f/r1 |
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h= |
A |
mm |
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srm= |
#DIV/0! |
mm |
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fctm= |
1,90 |
N/mm2 |
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Wc= |
b*h2/6 |
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Msd= |
mm |
kNm |
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Wc= |
#VALUE! |
mm3 |
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Mcr= |
fctm*Wc |
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Mcr= |
#VALUE! |
Nmm |
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Mcr= |
#VALUE! |
kNm |
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ssr/ss= |
Mcr/Msd |
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ssr/ss= |
#VALUE! |
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b |
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b1= |
1,0 |
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b2= |
0,5 |
obc. dług. |
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e sm= |
ss/Es*[1-b1*b2(ssr/ss)2] |
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ss=fyd= |
0,00 |
N/m2 |
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e sm= |
#VALUE! |
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Es= |
205000 |
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Wk= b*srm*e sm |
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b= |
1,3 |
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Wk= |
#DIV/0! |
mm |
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srm= |
#DIV/0! |
mm |
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e sm= |
#VALUE! |
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|
2.8.2.) Sprawdzenie ugięcia. |
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|
Eceff=Ecm/(1+f(oo ,to)) |
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Ecm= |
27500 |
N/mm2 |
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Eceff= |
6,548 |
kN/mm2 |
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f(oo ,to)= |
3,2 |
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ae=Es/Eceff |
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Es= |
205000 |
N/mm2 |
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ae= |
31,309 |
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Eceff= |
6,548 |
kN/mm2 |
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d= |
0 |
mm |
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b= |
140 |
mm |
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h= |
230 |
mm |
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II= |
141948333,333333 |
mm4 |
|
AsI= |
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xeff= |
48,3 |
mm |
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ae= |
31,309 |
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AsII= |
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III= |
57126255,06 |
mm4 |
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b1= |
1,0 |
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b2= |
0,5 |
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III= |
57126255,1 |
mm4 |
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II= |
141948333,333333 |
mm4 |
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ssr= |
1 |
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ss= |
1 |
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|
B(oo,to)= |
533413035,743317 |
mm |
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ak= |
#DIV/0! |
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a(oo,to)=ak*Msd*leff2/B(oo,to) |
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Msd= |
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a(oo,to)= |
#DIV/0! |
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leff= |
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B(oo,to)= |
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ak=5/48*(1+MA+MB/Mm) |
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Mm= |
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ak= |
#DIV/0! |
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MB= |
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MA= |
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a(oo,to)= |
#DIV/0! |
mm < B(oo,to) = |
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533413035,743317 |
mm |
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CNU. |
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POZ. 3 |
PODCIĄG |
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3.1.) Obciążenia. |
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3.1.1.)Obciążenia stałe. |
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700 |
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G = G1 + G2 |
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G1= |
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kN/m |
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G1= |
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G2= |
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kN/m |
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G2= |
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G = |
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kN/m |
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Zamiana na obciążenie równomierne: |
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G *0,31= |
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kN/m |
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3.1.2.) Obciążenia zmienne. |
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P= |
Po * lżebr. |
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Po = |
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kN |
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P= |
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kN/m |
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lżebr.= |
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m |
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3.2.) Schemat statyczny belki. |
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l1 |
l2 |
l2 |
l2 |
l2 |
l1 |
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3.2.2.) Długość obliczeniowa przęseł. |
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Przęsło skrajne |
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l1= |
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m |
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Przesło posrednie |
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l2= |
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m |
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3.3.) Obliczenia statyczne. |
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3.3.1.)Momenty: |
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maxM(x/l)=a*g*L2+b*p*L2 |
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p= |
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kN/m |
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minM(x/l)=a*g*L2+c*p*L2 |
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g= |
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kN/m |
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Przekrój |
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Współczynnki |
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L |
Mnożniki |
|
Momenty |
(kNm) |
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x/L |
a |
b |
c |
(m) |
gl2 (kNm) |
pl2 (kNm) |
Mmax |
Mmin |
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Przęsło skrajne |
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0 |
0 |
0 |
0 |
5,94 |
0 |
0 |
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0,1 |
0,0345 |
0,0397 |
-0,0053 |
5,94 |
0 |
0 |
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0,2 |
0,0589 |
0,0695 |
-0,0105 |
5,94 |
0 |
0 |
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0,3 |
0,0734 |
0,0892 |
-0,0158 |
5,94 |
0 |
0 |
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0,4 |
0,0779 |
0,0989 |
-0,0211 |
5,94 |
0 |
0 |
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0,5 |
0,0724 |
0,0987 |
-0,0263 |
5,94 |
0 |
0 |
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0,6 |
0,0568 |
0,0884 |
-0,0316 |
5,94 |
0 |
0 |
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0,7 |
0,0313 |
0,0682 |
-0,0366 |
5,94 |
0 |
0 |
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0,8 |
-0,0042 |
0,0381 |
-0,0423 |
5,94 |
0 |
0 |
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0,9 |
-0,0497 |
0,0183 |
-0,068 |
5,94 |
0 |
0 |
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1 |
-0,1053 |
0,0144 |
-0,1196 |
5,94 |
0 |
0 |
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Przęsło drugie |
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0 |
-0,1053 |
0,0144 |
-0,1196 |
6,03 |
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0,1 |
-0,0576 |
0,014 |
-0,0717 |
6,03 |
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0,2 |
-0,02 |
0,03 |
-0,050 |
6,03 |
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0,3 |
0,0076 |
0,0563 |
-0,0487 |
6,03 |
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0,4 |
0,0253 |
0,0726 |
-0,0474 |
6,03 |
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0,5 |
0,0329 |
0,0789 |
-0,0461 |
6,03 |
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0,6 |
0,0305 |
0,0753 |
-0,0447 |
6,03 |
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0,7 |
0,0182 |
0,0616 |
-0,0434 |
6,03 |
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0,8 |
-0,0042 |
0,0389 |
-0,0432 |
6,03 |
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0,9 |
-0,0366 |
0,028 |
-0,0646 |
6,03 |
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1 |
-0,0789 |
0,0323 |
-0,1112 |
6,03 |
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Przęsło środkowe |
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0 |
-0,0789 |
0,0323 |
-0,1112 |
6,03 |
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0,1 |
-0,0339 |
0,0293 |
-0,0633 |
6,03 |
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0,2 |
0,0011 |
0,0416 |
-0,0405 |
6,03 |
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0,3 |
0,0261 |
0,0655 |
-0,0395 |
6,03 |
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0,4 |
0,0411 |
0,0805 |
-0,0395 |
6,03 |
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0,5 |
0,0461 |
0,0855 |
-0,0395 |
6,03 |
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WYKRES |
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3.3.2.) Siły poprzeczne. |
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Qmax= |
a*g*L+b*q*L |
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g= |
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kN/m |
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Qmin= |
a*g*L+g*q*L |
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q= |
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kN/m |
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Przekrój |
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Współczynnki |
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L |
Mnożniki |
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Siły poprz. (kN) |
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x/L |
a |
b |
g |
(m) |
gl (kN) |
pl (kN) |
Qmax |
Qmin |
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Przęsło skrajne |
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0 |
0,3947 |
0,04474 |
-0,0536 |
5,94 |
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0,1 |
0,2947 |
0,3537 |
-0,059 |
5,94 |
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0,2 |
0,1947 |
0,2726 |
-0,0779 |
5,94 |
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0,3 |
0,0947 |
0,2039 |
-0,1091 |
5,94 |
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0,4 |
-0,0053 |
0,1471 |
-0,1524 |
5,94 |
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0,5 |
-0,1053 |
0,1017 |
-0,2069 |
5,94 |
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0,6 |
-0,2053 |
0,0669 |
-0,2722 |
5,94 |
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0,7 |
-0,3053 |
0,0419 |
-0,3472 |
5,94 |
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0,8 |
-0,4053 |
0,0257 |
-0,4309 |
5,94 |
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0,9 |
-0,5053 |
0,0169 |
-0,5222 |
5,94 |
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1 |
-0,6053 |
0,0144 |
-0,6196 |
5,94 |
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Przęsło drugie |
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0 |
0,5263 |
0,5981 |
-0,0718 |
6,03 |
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0,1 |
0,4263 |
0,5018 |
-0,0755 |
6,03 |
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0,2 |
0,3263 |
0,4141 |
-0,088 |
6,03 |
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0,3 |
0,2263 |
0,3364 |
-0,1101 |
6,03 |
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0,4 |
0,1263 |
0,2697 |
-0,1434 |
6,03 |
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0,5 |
0,0263 |
0,2146 |
-0,1882 |
6,03 |
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0,6 |
-0,0737 |
0,1717 |
-0,2448 |
6,03 |
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0,7 |
-0,1737 |
0,1391 |
-0,3182 |
6,03 |
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0,8 |
-0,2737 |
0,1179 |
-0,3916 |
6,03 |
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0,9 |
-0,3737 |
0,1063 |
-0,48 |
6,03 |
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1 |
-0,4737 |
0,1029 |
-0,5766 |
6,03 |
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Przęsło środkowe |
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0 |
0,5 |
0,5909 |
-0,0909 |
6,03 |
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0,1 |
0,4 |
0,4944 |
-0,0944 |
6,03 |
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0,2 |
0,3 |
0,4063 |
-0,1063 |
6,03 |
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0,3 |
0,2 |
0,3279 |
-0,1279 |
6,03 |
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0,4 |
0,1 |
0,2604 |
-0,1604 |
6,03 |
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0,5 |
0 |
0,2045 |
-0,2045 |
6,03 |
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WYKRES |
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3.4.) Obliczenie stanu granicznego nośności. |
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3.4.1.) Przęsło skrajne. |
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.3.4.1.1.) Przekrój w przęśle. |
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670 |
700 |
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Typ przekroju - prostokątny. |
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Msd max= |
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kNm |
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b=300 |
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Ilość zbrojenia : |
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Sb= |
Msd/(a*fcd*beff*d2) |
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Msd= |
0,00 |
kNm |
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Sb= |
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beff= |
300,00 |
mm |
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Stąd z= |
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fcd= |
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N/mm2 |
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Stal klasy III --- fyd= |
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N/m2 |
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a= |
0,85 |
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z= |
0,065 |
< zefflim = |
0,530 |
dla A III |
d= |
670,00 |
mm |
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AS1= |
Msd*1000000/(z*fyd*d) |
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fyd= |
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N/m2 |
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AS1= |
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mm2 |
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f= |
12,00 |
mm |
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Przyjęto zbrojenie 1f12 o As1= |
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113,0 |
mm2 |
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3.4.1.2.) Przekrój nad podporą pośrednią B. |
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a= |
0,85 |
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fcd= |
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N/mm2 |
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d= |
670,00 |
mm |
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beff= |
300 |
mm |
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670 |
700 |
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Sb= |
Msd*1000000/(a*fcd*beff*d2) |
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Sb= |
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Stąd z= |
0,967 |
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a
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Przekrój pojedyńczo zbrojony. |
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b=300 |
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AS2= |
Msd*1000000/(z*fyd*d) |
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fyd= |
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N/m2 |
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AS2= |
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mm2 |
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Przyjęto zbrojenie gorne nad podpora B 1f12 o As1= |
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mm2 |
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3.4.1.3.) Zbrojenie na ścinanie: |
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Nosność betonu na ścinanie. |
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Wspołczynnik efektywny: |
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n= |
0,7-fck/200>=0,5 |
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B20 Stąd fck= |
1,6 |
N/mm |
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n= |
0,692 |
>0,5 |
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d= |
0,670 |
m |
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k= 1,6-d |
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As1= |
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mm2 |
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k= |
0,93 |
<1 |
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bw= |
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mm |
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Przyjmuję k = 1 |
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d= |
670,0 |
mm |
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Efektywny stopień zbrojenia: |
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rL= |
As1/bw*d |
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rL= |
#DIV/0! |
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Nośnośc przekroju bez zbrojenia. |
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trd= |
56,6 |
N/mm2 |
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VRd1= |
(k*trd(1,2+4,0*rL))*bw*d |
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rL= |
#DIV/0! |
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VRd1= |
#DIV/0! |
N |
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k= |
0,93 |
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VRd1= |
#DIV/0! |
kN |
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d= |
670,0 |
mm |
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VRd1= |
#DIV/0! |
kN<VsdAkr= |
#REF! |
kN |
bw= |
0,0 |
mm |
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Rozstaw strzemion oraz prętów odgiętych przy podporze skrajnej A |
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Nośnośc przekroju zbrojonego strzemionami. |
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n= |
0,692 |
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VRd2= |
bw*z*g*fcd/(cotO+tgO) |
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bw= |
0,0 |
mm |
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VRd2= |
0,00 |
kN |
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d= |
670,0 |
mm |
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z=0,9*d= |
603,0 |
mm |
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fcd= |
0,00 |
N/mm2 |
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O= |
44o59'59'' |
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Przyjęto, że zbrojenie strzemionami na odcinku przpodporowym przenosi co najmniej 30% siły ścinającej |
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VA= |
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kN |
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Strzemiona f 8 o Asw1= |
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mm2 |
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Sprawdzenie warunku normowego: |
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bw= |
56,6 |
mm |
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Asw1*fywd/bw*s1<=0,5*n*fcd |
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Asw1= |
0,00 |
mm2 |
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fywd = |
0 |
N/mm |
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#VALUE! |
<0,5*n*fcd= |
n= |
0 |
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Warunek spelniony. |
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fcd= |
0,93 |
N/mm2 |
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s1= |
Asw*z*fywd*cotO/Vsd2 |
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s1= |
#VALUE! |
mm |
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s1= |
#VALUE! |
mm > 200 mm co |
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200,0 |
mm |
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Vsd<= |
VRd / 5 |
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VRd = |
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kN |
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Vsd= |
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Vsd<
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kN |
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Warunek spełniony. |
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Siła przenoszona przez zbrojenie strzemionami; |
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VRd3= |
(Asw1/s1)*z*fywd*cotO>= |
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Vsd2 |
Asw= |
0,00 |
mm2 |
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VRd3= |
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z= |
#DIV/0! |
mm |
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VRd3= |
>Vsdkr/2 |
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Przyjęto strzemiona dwucięte f 8 o Asw1=200mm2 |
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Przyjęto rozstaw 250 mm na odcinku 1,6 m |
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Pozostała część siły ścinającej zostanie przeniesiona przez pręty odgięte |
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Siła przypadająca na pręty odgięte. |
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Vsdc1= Vsdkr - VRd3 = |
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kN |
Vsdkr = |
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kN |
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VRd3 = |
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kN |
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Powierzchnia zbrojenia prętów odgiętych: |
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c= |
(VsdAkr-VRd1)/q |
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VsdAkr= |
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kN |
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c= |
#DIV/0! |
mm |
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d= |
|
mm |
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c<3*d= |
|
mm |
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VRd1= |
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kN |
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q= |
|
kN/m |
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s2= c/2 |
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s2= |
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a= |
#REF! |
mm |
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Przyjęto dwa odgięcia. |
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fywd = |
0 |
N/mm |
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Asw2>=(Vsd01*s2)/(a*fywd*(cotO+cota)*sina) |
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Asw2> |
#REF! |
mm |
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Na odcinku c1 przyjęto zbrojenie prętami odgiętymi |
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f16 o Asw= |
0,0 |
mm2 |
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V c2= |
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kN |
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Siła przypadająca na pręty odgięte na odcinku c2. |
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.......... |
< |
............. |
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Na odcinku c2 wystarczy zbrojenie strzemionami. |
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.3.4.2.) Przęsło drugie. |
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.3.4.2.1.) Zbrojenie na zginanie. |
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Msd max= |
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kNm |
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Ilość zbrojenia : |
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670 |
700 |
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Sb= |
Msd/(a*fcd*beff*d2) |
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Sb= |
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Stąd z= |
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b=300 |
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Stal klasy III --- fyd= |
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N/m2 |
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z= |
0,065 |
< zefflim = |
0,530 |
dla A III |
|
Msd= |
0,00 |
kNm |
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beff= |
300,00 |
mm |
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AS1= |
Msd*1000000/(z*fyd*d) |
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fcd= |
|
N/mm2 |
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AS1= |
|
mm2 |
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a= |
0,85 |
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d= |
670,00 |
mm |
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fyd= |
|
N/m2 |
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f= |
12,00 |
mm |
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Przyjęto zbrojenie 1f12 o As1= |
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113,0 |
mm2 |
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Przekrój przy podporze C: |
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Msd max= |
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kNm |
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a= |
0,85 |
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fcd= |
|
N/mm2 |
|
670 |
700 |
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d= |
670,00 |
mm |
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beff= |
300 |
mm |
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fyd= |
|
N/m2 |
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Sb= |
Msd*1000000/(a*fcd*beff*d2) |
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Sb= |
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a
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Stąd z= |
0,967 |
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b=300 |
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AS1= |
Msd*1000000/(z*fyd*d) |
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AS1= |
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mm2 |
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Przyjęto zbrojenie górne nad podpora B 1f12 o As1= |
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mm2 |
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3.4.2.2.) Zbrojenie na ścinanie na podporze B z obydwu jej stron: |
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Nosność betonu nie zbrojonego na ścinanie. |
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Wspołczynnik efektywny: |
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n= |
#REF! |
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k = 1 |
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Efektywny stopień zbrojenia: |
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As1= |
|
mm2 |
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rL= |
As1/bw*d |
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bw= |
|
mm |
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rL= |
#DIV/0! |
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d= |
670,0 |
mm |
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Nośnośc przekroju bez zbrojenia. |
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VRd1= |
|
kN |
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VRd2= |
|
kN - Nosność elementu zbrojonego strzemionami i prętami odgiętymi na scinanie. |
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z= |
|
mm |
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Rozstaw strzemion oraz prętów odgietych przy podporze drugiej. |
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Vsdkr= |
|
kN |
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|
RYSUNEK |
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Przyjęto zbrojenie na odcinku przypodporowym strzemionami i prętami odgiętymi. Strzemiona przenoszą |
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co najmniej 50% sił poprzecznych.przyjęto rozstaw strzemion 200 mm. |
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Strzemiona f 8 o Asw1= |
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mm2 |
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VRd3= |
(Asw1/s1)*z*fywd*cotO>= |
|
Vsd2 |
Asw= |
#REF! |
mm2 |
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VRd3= |
|
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z= |
0,0 |
mm |
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VRd3= |
>Vsdkr/2 |
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Vsdkr = |
|
kN |
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fywd = |
0 |
N/mm |
|
|
Siła przypadająca na pręty odgięte. |
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Vsdc1= Vsdkr - VRd3 = |
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|
kN |
Vsdkr = |
|
kN |
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VRd3 = |
|
kN |
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|
Powierzchnia zbrojenia prętów odgiętych: |
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c= |
(VsdAkr-VRd1)/q |
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VsdAkr= |
|
kN |
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c= |
|
mm |
|
d= |
|
mm |
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c<3*d= |
|
mm |
|
VRd1= |
|
kN |
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q= |
|
kN/m |
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s2= c/2 |
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s2= |
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a= |
#REF! |
mm |
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fywd = |
N/mm |
N/mm |
|
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Asw2>=(Vsd01*s2)/(a*fywd*(cotO+cota)*sina) |
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Asw2> |
#REF! |
mm |
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|
Na odcinku c1 przyjęto zbrojenie prętami odgiętymi |
|
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|
f16 o Asw= |
0,0 |
mm2 |
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Siła tnąca na końcu odcinka c1. |
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V c2= |
|
kN< VRd3= |
|
kN |
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|
Na odcinku c2 wystarczy zbrojenie strzemionami. |
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|
3.4.2.3.) Zbrojenie na ścinanie na podporze C z obu jej stron: |
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|
VRd3= |
(Asw1/s1)*z*fywd*cotO>= |
|
Vsd2 |
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VRd3= |
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|
Siła przypadająca na pręty odgięte na odcinku c1. |
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Vsdc1= Vsdkr - VRd3 = |
|
|
kN |
Vsdkr = |
|
kN |
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|
|
VRd3 = |
|
kN |
|
|
Powierzchnia zbrojenia prętów odgiętych: |
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c= |
(VsdAkr-VRd1)/q |
|
|
VsdAkr= |
|
kN |
|
|
|
c= |
#DIV/0! |
mm |
|
d= |
|
mm |
|
|
|
c<3*d= |
|
mm |
|
VRd1= |
|
kN |
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q= |
|
kN/m |
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|
s2= c/2 |
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s2= |
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a= |
#REF! |
mm |
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|
Przyjęto dwa odgięcia. |
|
|
|
fywd = |
#REF! |
N/mm |
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Asw2>=(Vsd01*s2)/(a*fywd*(cotO+cota)*sina) |
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Asw2> |
#REF! |
mm |
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|
|
Na odcinku c1 przyjęto zbrojenie prętami odgiętymi |
|
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|
|
1f16 o Asw= |
0,0 |
mm2 |
|
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|
V c2= |
|
kN< VRd3= |
|
kN |
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|
Na odcinku c2 wystarczy zbrojenie strzemionami. |
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3.5.). SGU (Przęsło skrajne). |
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|
3.5.1.) Sprawdzenie zarysowań. |
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|
3.5.1.1.) Rysy prostopałe. |
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|
Wk= b*srm*e sm |
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|
Dla b= |
70,0 |
mm < 300 |
b= |
1,3 |
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|
|
|
Aceff= |
2,5*a*b |
|
|
a= |
30,00 |
mm |
|
|
|
Aceff= |
5250,0 |
mm2 |
|
b= |
70,00 |
mm |
|
|
|
r1= |
As/Aceff |
|
|
As= |
0,0 |
mm2 |
|
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r1= |
0,000 |
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k1= |
0,8 |
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srm= |
50+0,25*k1*k2*f/r1 |
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k2= |
0,5 |
el. zgin. |
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srm= |
#DIV/0! |
mm |
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h= |
N/m2 |
mm |
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Wc= |
b*h2/6 |
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fctm= |
1,90 |
N/mm2 |
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Wc= |
#VALUE! |
mm3 |
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Msdo= |
0,00 |
kNm |
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Mcr= |
fctm*Wc |
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Mcr= |
#VALUE! |
Nmm |
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Mcr= |
#VALUE! |
kNm |
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Msd= |
0,9*Msdo |
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Msd= |
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kN |
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ssr/ss= |
Mcr/Msd |
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b1= |
1,0 |
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ssr/ss= |
#VALUE! |
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b2= |
0,5 |
obc. dług. |
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e sm= |
ss/Es*[1-b1*b2(ssr/ss)2] |
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ss=fyd= |
0,00 |
N/m2 |
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e sm= |
#VALUE! |
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Es= |
205000 |
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b= |
1,3 |
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Wk= b*srm*e sm |
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srm= |
#DIV/0! |
mm |
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Wk= |
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mm |
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e sm= |
#VALUE! |
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2.5.1.2.) Sprawdzenie rys ukośnych. |
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t= |
Vsd/(bw*d) |
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Vsd= |
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kN |
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t= |
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bw= |
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d= |
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rw= |
rw1+rw2 |
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Asw1= |
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rw1= |
Asw1/(s1*bw) |
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s1= |
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rw1= |
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bw= |
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rw2= |
Asw2/(s2*bw*sina) |
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Asw2= |
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rw2= |
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s2= |
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rw= |
rw1+rw2 |
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a= |
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rw= |
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f1= |
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mm |
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b1= |
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f2= |
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mm |
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b2= |
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l= |
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fck= |
16 |
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wk= |
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mm |
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2.5.1.3.). Sprawdzenie ugięcia. |
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Eceff=Ecm/(1+f(oo ,to)) |
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Ecm= |
27500 |
N/mm2 |
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Eceff= |
6,548 |
kN/mm2 |
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f(oo ,to)= |
3,2 |
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ae=Es/Eceff |
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Es= |
205000 |
N/mm2 |
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ae= |
31,309 |
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Eceff= |
6,548 |
kN/mm2 |
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d= |
kN |
mm |
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b= |
140 |
mm |
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h= |
230 |
mm |
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II= |
#VALUE! |
mm4 |
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AsI= |
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xeff= |
48,3 |
mm |
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ae= |
31,309 |
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AsII= |
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III= |
#VALUE! |
mm4 |
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b1= |
1,0 |
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b2= |
0,5 |
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III= |
#VALUE! |
mm4 |
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II= |
#VALUE! |
mm4 |
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ssr= |
1 |
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ss= |
1 |
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B(oo,to)= |
#VALUE! |
mm |
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ak= |
#DIV/0! |
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Msd= |
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leff= |
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B(oo,to)= |
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a(oo,to)= |
#DIV/0! |
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Mm= |
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MB= |
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ak=5/48*(1+MA+MB/Mm) |
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MA= |
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ak= |
#DIV/0! |
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a(oo,to)= |
#DIV/0! |
mm < B(oo,to) = |
|
#VALUE! |
mm |
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CNU. |
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POZ.4. SŁUP. |
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4.1.) Zestawienie obciążeń. |
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Obciążenie obliczeniowe stropodachu |
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gf |
go [kN/m2] |
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Ciężar własny płyty : |
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0,6*2,4= |
1,44 |
|
1,1 |
1,58 |
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Izolacja techniczna: |
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0,05*4,5= |
0,225 |
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1,2 |
0,27 |
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Gładź cementowa: |
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0,02*21= |
0,42 |
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1,2 |
0,50 |
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Papa x 2: |
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0,122 |
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1,2 |
0,15 |
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Tynk: |
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0,015*19= |
0,285 |
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1,2 |
0,34 |
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S= |
2,85 |
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Obciążenie śniegiem |
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gf |
go [kN/m2] |
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p= |
0,7 |
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1,4 |
0,98 |
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S= |
3,83 |
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go = |
(3,83*0,31*5,4)kN/m2 |
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go = |
6,41 |
kN/m2 |
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Obciążenie od podciągu |
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RA |
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Reakcja pod podporą |
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316,05 |
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Reakcja od czterech kondygnacji |
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4*316,05 |
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1264,2 |
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Ciężar słupa: |
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L=3,2-0,7= |
2,5 |
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0,3*0,3*3*2,5*24*1,1=17,832 |
|
|
kN |
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0,3*0,3*2,8*24*1,1= |
|
6,852 |
kN |
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0,3 |
|
Całkowita siła obciążająca słup na podporze: |
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Nsd= |
(6,44+1264,2+6,65+17,82)kN |
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Nsd= |
1295,11 |
kN |
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0,3 |
|
(m) |
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4.2.) Schemat statyczny słupa: |
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4.2.1.) Długość obliczeniowa słupa: |
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70 |
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Przekrój słupa. |
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(cm) |
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250 |
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d=27 |
30 |
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H= |
3,2 |
m |
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hp= |
0,7 |
m |
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lcol= H-hp+0,3 |
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lcol= |
2,8 |
m |
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lo= |
0,8 * lcol = |
2,24 |
m |
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lo/h= |
2,24/0,3 = |
7,467 |
m <10 |
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4.3.) Obliczenie ilości zbrojenia w słupie: |
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4.3.1.) Określenie mimośrodu: |
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eo= |
ee+ ea |
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Mimośród statyczny: |
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ea =0 |
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Momośród niezamierzony: |
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lo/600= |
3,73 |
mm |
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lo= |
2,24 |
m |
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eamax= |
h/30= |
10 |
mm |
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h= |
0,3 |
m |
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10mm |
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ea= |
10mm = etot |
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4.3.2.) Sprawdzenie czy słup pracuje w małym czy w dużym mimośrodzie: |
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Nsd= |
a*fcd*xeff*d*b |
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Nsd= |
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xeff= |
Nsd/(a*fcd*d*b) |
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a= |
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xeff= |
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fcd= |
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d= |
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xeff= |
|
> xefflim = |
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b= |
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Słup pracuje w małym mimośrodzie. |
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4.3.3.) Wyznaczenie efektywnej strefy ściskanej: |
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Nsd= |
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a= |
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es2= |
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fcd= |
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d= |
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xeff= |
|
m> h=300 |
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a'= |
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Przyjmuję xeff=h=300 |
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4.3.4.)Określenie ilości zbrojenia: |
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Nsd= |
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a= |
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As1=As2= |
|
mm2 |
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es2= |
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As1=As2= |
|
cm2 |
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fcd= |
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d= |
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a'= |
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Przyjęto zbrojenie 4 f 22 o As1= |
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|
0 |
cm2 |
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xeff= |
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fyd= |
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4.3.4.) Rozstaw strzemion w słupie. |
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b= |
0,0 |
mm |
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rl= |
As1/(b*d) |
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As1= |
0,00 |
mm2 |
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rl= |
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d= |
0 |
mm |
|
|
Przyjęto strzemiona f 10 co 15 cm. |
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POZ. 5. STOPA FUNDAMENTOWA. |
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|
Nsd |
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5.1.) Schemat stopy. |
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Nsd= |
|
kN |
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gfund= |
|
kN/m2 |
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G
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5.2.). Określenie wymiarów stopy: |
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100 |
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G= |
B*24*1 |
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30 |
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G= |
60 |
kN/m2 |
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gfund= |
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kN/m2 |
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m= |
0,81 |
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B=L=250 |
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Nsd= |
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kN |
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300 |
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30 |
F= |
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m2 |
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F= |
B*L
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0 |
m2 |
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A |
A |
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G= |
60 |
kN/m2 |
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Nsd= |
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kN |
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B= |
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m |
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gro= |
Nsd+G/B2 |
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A-A |
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gro= |
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l= |
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cm |
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asl=asb=hst= |
100 |
cm |
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a |
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B= |
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cm |
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d=95 |
h=100 |
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Ma= |
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kNcm |
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Ma= |
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kNcm |
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d= |
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cm |
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fyd= |
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kN |
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As1= |
Ma/(0,9*d*fyd) |
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As1= |
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Przyjęto zbrojenie prętami |
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f 7 o Asw= |
0,0 |
cm2 |
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5.3.) Przebicie. |
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Nsd -A*gro<=NRd |
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d= |
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m |
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up= |
(u1+u2)/2 |
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fctd= |
0,87 |
N/mm2 |
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up= |
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m |
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u1= |
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m |
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u2= |
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m |
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NRd= |
fctd*up*d |
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NRd= |
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kN |
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gro= |
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Nsd -A*gro<=NRd |
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A= |
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mm2 |
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Nsd - A * gro = |
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kN<=NRd= |
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kN |
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Warunek spełniony. |
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a= |
45o |
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220 |
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