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Projekt belki żelbetowej |
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1.Dane początkowe |
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Dane: |
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Przyjmuję: |
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Przekrój: |
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delta g max= |
3.6 |
kN/m. |
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h= |
0.45 |
m |
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delta g min= |
3.15 |
kN/m. |
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b= |
0.25 |
m |
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q= |
14 |
kN/m. |
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Ciężar objętościowy betonu= |
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fck= |
16 |
Mpa |
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24 |
kN/m. |
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fctd= |
870 |
kPa |
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fcd= |
10600 |
kPa |
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fyd= |
350000 |
kPa |
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alfa= |
0.85 |
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otulina a= |
0.035 |
m |
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Beton |
B20 |
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La= |
7.1 |
m |
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Stal |
AIII (34GS) |
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Lb= |
2.4 |
m |
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2.Obwiednia |
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pole A= |
0.1125 |
m^2 |
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obciążenie własne_g |
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g_min= |
2.43 |
kN/m. |
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g= |
2.7 |
kN/m. |
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g_max= |
2.97 |
kN/m. |
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obciążenie minimalne |
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p_min= |
5.58 |
kN/m. |
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obciążenie maksymalne |
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p_max= |
20.57 |
kN/m. |
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Kombinacje obciążeń: |
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Pmin |
Pmin |
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Pmax |
Pmax |
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Pmin |
Pmax |
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Pmax |
Pmin |
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5.58 |
5.58 |
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20.57 |
20.57 |
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5.58 |
20.57 |
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20.57 |
5.58 |
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Ra_min= |
17.546 |
kN |
Ra_max= |
64.68 |
kN |
Ra= |
11.465 |
kN |
Ra= |
70.76 |
kN |
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Rb_min= |
35.464 |
kN |
Rb_max= |
130.735 |
kN |
Rb= |
77.521 |
kN |
Rb= |
88.679 |
kN |
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Momenty: |
x liczone od podpory A |
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Ma= |
0 |
kNm |
Ma= |
0 |
kNm |
Ma= |
0 |
kNm |
Ma= |
0 |
kNm |
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Mb= |
-16.07 |
kNm |
Mb= |
-59.242 |
kNm |
Mb= |
-59.242 |
kNm |
Mb= |
-16.07 |
kNm |
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Maksimum |
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Maksimum |
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Maksimum |
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Maksimum |
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dla x= |
3.14 |
m. |
dla x= |
3.14 |
m. |
dla x= |
2.05 |
m. |
dla x= |
3.44 |
m. |
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M_max= |
27.508 |
kNm |
M_max= |
101.406 |
kNm |
M_max= |
11.725 |
kNm |
M_max= |
121.709 |
kNm |
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M.=0 x= |
6.29 |
m. |
M.=0 x= |
6.29 |
m. |
M.=0 x= |
4.11 |
m. |
M.=0 x= |
6.88 |
m. |
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Tnące: |
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A-B= |
17.546 |
kN |
A-B= |
64.68 |
kN |
A-B= |
11.465 |
kN |
A-B= |
70.76 |
kN |
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B-A= |
-22.072 |
kN |
B-A= |
-81.367 |
kN |
B-A= |
-28.153 |
kN |
B-A= |
-75.287 |
kN |
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B-1= |
13.392 |
kN |
B-2= |
49.368 |
kN |
B-2= |
49.368 |
kN |
B-2= |
13.392 |
kN |
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3.Zginanie |
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Pole AS1 |
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Mrd= |
121.709 |
kNm |
d= |
0.415 |
m |
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xeff1= |
0.668296851988976 |
m |
xeff2= |
0.16 |
m |
pierwiastek delty= |
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0.064159295227525 |
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przyjmuję xeff= |
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0.16 |
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psi= |
0.39 |
<= |
0.53 |
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As1= |
10.3 |
cm^2 |
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Przyjmuję As1= |
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12.06 |
cm^2 |
6 fi 16 |
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stopień zbrojenia |
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1.16240963855422 |
% |
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rzeczywisty moment przenoszony przez pręty |
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141.4035 |
kNm |
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pole As2 |
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Mrd= |
59.242 |
kNm |
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xeff1= |
0.760866867626962 |
m |
xeff2= |
0.07 |
m |
pierwiastek delty= |
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0.119623890122087 |
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przyjmuję xeff= |
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0.07 |
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psi= |
0.17 |
<= |
0.53 |
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As1= |
4.51 |
cm^2 |
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Przyjmuję As1= |
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6.03 |
cm^2 |
3 fi 16 |
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stopień zbrojenia |
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0.581204819277108 |
% |
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rzeczywisty moment przenoszony przez pręty |
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80.199 |
kNm |
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