Dane do projektu: |
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Obciążenie obliczeniowe przekazywane na fundament |
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# wartości z projektu |
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od ściany wewnętrznej |
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QRB1= |
520 |
kN/m |
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od ściany zewnętrznej |
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QRB2= |
300 |
kN/m |
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QRB1= |
520 |
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r2= |
2,00 |
m |
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r1= |
1,18 |
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8,6 |
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QRB2= |
300 |
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0,0 |
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2,1
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hp |
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1 |
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6,0
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Pd |
ID= |
0,2 |
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#wartość z tablic lub norm |
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2 |
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12,0
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πp "C" |
IL= |
0,5 |
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3 |
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Pπ |
ID= |
0,4 |
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Ława fundamentowa |
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1. Obliczenia dotyczące pali |
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1.1 Rozmieszczenie pali |
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Do obliczeń przyjęto: |
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pale wiercone Franki o średnicy: |
D= |
0,6 |
m |
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#wartość założona |
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ława fundamentowa o wymiarach: |
b x h |
0,8 |
x |
0,75 |
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h= 0,75 - 0,8 m |
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grubość ściany: |
bś= |
0,51 |
m |
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Ciężar własny ławy |
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qr=1,1*b*h*γb*1,0 |
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qr= |
16,50 |
kN/m |
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gdzie: |
γb= |
25 |
kN/m3 |
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"t" |
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Całkowite obciążenie obliczeniowe |
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Qr1=QRB1+qr |
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Qr1= |
536,50 |
kN/m |
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Qr2=QRB2+qr |
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Qr2= |
316,50 |
kN/m |
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Przyjęto rozstaw pali: |
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r1= |
1,18 |
m |
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r2= |
2,00 |
m |
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Siły przekazywane na pal nr 1 |
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Nr1=r1*Qr1 |
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Nr1= |
633,07 |
kN |
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Nr2=(0,5*r1)*Qr1+(r2*Qr2) |
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Nr2= |
949,54 |
kN |
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Nr3=r2*Qr2 |
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Nr3= |
633,00 |
kN |
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1.2 Warunki geotechniczne |
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hz= |
3,4 |
m |
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γ |
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17,00 |
Pd |
ID= |
0,2 |
t1= |
0,0 |
kPa |
t1(r)=0,9*t1= |
0,00 |
kPa |
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"q" |
19,50 |
πp "C" |
IL= |
0,5 |
t2= |
25,0 |
kPa |
t2(r)=0,9*t2= |
22,50 |
kPa |
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Pπ |
ID= |
0,4 |
t3= |
29,1 |
kPa |
t3(r)=0,9*t3= |
26,21 |
kPa |
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Pπ |
ID= |
0,4 |
q3= |
1345,6 |
kPa |
q3(r)=0,9*q3= |
1211,0 |
kPa |
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Współczynniki technologiczne dla pali Franki |
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Pd |
ID= |
0,2 |
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Ss1= |
1,6 |
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πp "C" |
IL= |
0,5 |
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Ss2= |
1,0 |
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Pπ |
ID= |
0,4 |
Sp3= |
1,8 |
Ss3= |
1,6 |
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Wartości kąta α, tgα dla każdej warstwy |
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warstwa 1 |
Pd |
tgα1= |
0,087 |
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warstwa 2 |
πp "C" |
tgα2= |
0,07 |
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tgα1= |
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warstwa 3 |
Pπ |
tgα3= |
0,105 |
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tgα2= |
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1.3 Długość pali |
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tgα3= |
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# Pal nr 1 |
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Przyjęto zagłębienie pala w warstwie nośnej hk= |
0,5 |
m |
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Strefa naprężeń w gruncie wokół pali |
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R= |
1,11 |
m |
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współczynnik redukcyjny |
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1,06 |
m |
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m1= |
0,70 |
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m1= |
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Pole przekroju poprzecznego podstawy pala |
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Ap= |
0,2826 |
m2 |
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Obliczeniowa nośność pala wciskanego |
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Nt= |
771,9982272 |
kN |
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m*Nt= |
694,79840448 |
kN |
> |
Nr1= |
633,07 |
kN |
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Warunek spełniony |
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Przyjęto długość pala |
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L1=(h1-hp)+(h2-h1)+hk |
L1= |
10,4 |
m |
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# Pal nr 2 |
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Przyjęto zagłębienie pala w warstwie nośnej hk= |
8,0 |
m |
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Strefa naprężeń w gruncie wokół pali |
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R= |
1,90 |
m |
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współczynnik redukcyjny |
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0,62 |
m |
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m1= |
0,53 |
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Pole przekroju poprzecznego podstawy pala |
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Ap= |
0,2826 |
m2 |
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Obliczeniowa nośność pala wciskanego |
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Nt= |
1086,4942272 |
kN |
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m*Nt= |
977,84480448 |
kN |
> |
Nr2= |
949,54 |
kN |
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Warunek spełniony |
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Przyjęto długość pala |
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L2=(h1-hp)+(h2-h1)+hk |
L2= |
17,9 |
m |
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# Pal nr 3 |
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Przyjęto zagłębienie pala w warstwie nośnej hk= |
0,5 |
m |
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Strefa naprężeń w gruncie wokół pali |
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R= |
1,11 |
m |
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współczynnik redukcyjny |
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1,80 |
m |
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m1= |
0,97 |
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Pole przekroju poprzecznego podstawy pala |
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Ap= |
0,2826 |
m2 |
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Obliczeniowa nośność pala wciskanego |
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Nt= |
771,9982272 |
kN |
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m*Nt= |
694,79840448 |
kN |
> |
Nr3= |
633,00 |
kN |
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Warunek spełniony |
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Przyjęto długość pala |
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L3=(h1-hp)+(h2-h1)+hk |
L3= |
10,4 |
m |
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2. Obliczenia wytrzymałościowe ławy fundamentowej opartej na palach |
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2.1 Obliczeniowy ciężar własny ławy |
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qr= |
16,50 |
kN/m |
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Ława wewnętrzna |
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2.2 Obliczeniowe obciążenie trójkątną pryzmą ściany |
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grubość ściany |
bś= |
0,51 |
m |
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rozpiętość obliczeniowa przęseł |
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l=2*r1 |
l= |
2,36 |
m |
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pr=1,1*bś*0,5*l*tg60º*γb |
pr= |
28,63 |
kN |
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2.3 Wartości momentów zginających |
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* dla przęsła skrajnego |
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p |
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A |
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B |
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l=2r |
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Moment podporowy |
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MA=0 |
MB=-(0,125*qr+0,078*pr)*l2 |
MB= |
-23,93 |
kNm |
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Odległość przekroju (od podpory A), w którym występuje maksymalny moment przęsłowy |
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x= |
0,94 |
m |
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Moment przęsłowy |
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Mprz= |
15,42 |
kNm |
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* dla przęseł pośrednich |
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p |
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Klasa betonu |
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l=2r |
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MA=MB=-(0,0833*qr+0,0521*pr)*l2 |
MA=MB= |
-15,96 |
kNm |
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Mprz=(0,0417*qr+0,03125*pr)*l2 |
Mprz= |
8,82 |
kNm |
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2.4 Obliczenie zbrojenia ławy |
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Przyjęto beton |
B-20 |
fcd= |
10,6 |
Mpa |
fctm= |
1,9 |
Mpa |
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stal |
A-I |
fyd= |
210 |
Mpa |
fyk= |
240 |
MPa |
Wysokość użyteczna |
cmin= |
0,04 |
Δc= |
0,01 |
Φ= |
0,014 |
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d=h-Cmin-Δc-Φs-0,5*Φ |
d= |
0,687 |
m |
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Φs= |
0,006 |
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Zbrojenie na podporze |
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Zbrojenie w przęśle |
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MB= |
-23,93 |
kNm |
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Mprz= |
15,42 |
kNm |
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As1= |
-1,84 |
cm2 |
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As1= |
1,19 |
cm2 |
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Zbrojenie minimalne |
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Asmin> |
0,26*(fctm/fyk)b*d= |
11,31 |
cm2 |
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0,0013*b*d= |
7,14 |
cm2 |
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Przyjęto zbrojenie przętami 8Φ14 co 100 mm o As1=12,32 cm2 |
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Ława zewnętrzna |
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2.4 Obliczeniowe obciążenie trójkątną pryzmą ściany |
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grubość ściany |
bś= |
0,51 |
m |
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rozpiętość obliczeniowa przęseł |
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l=2*r1 |
l= |
4 |
m |
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pr=1,1*bś*0,5*l*tg60º*γb |
pr= |
48,53 |
kN |
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2.5 Wartości momentów zginających |
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* dla przęsła skrajnego |
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p |
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A |
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B |
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l=2r |
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Moment podporowy |
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MA=0 |
MB=-(0,125*qr+0,078*pr)*l2 |
MB= |
-93,56 |
kNm |
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Odległość przekroju (od podpory A), w którym występuje maksymalny moment przęsłowy |
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x= |
1,61 |
m |
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Moment przęsłowy |
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Mprz= |
66,48 |
kNm |
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* dla przęseł pośrednich |
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p |
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l=2r |
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MA=MB=-(0,0833*qr+0,0521*pr)*l2 |
MA=MB= |
-62,44 |
kNm |
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Mprz=(0,0417*qr+0,03125*pr)*l2 |
Mprz= |
35,27 |
kNm |
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2.4 Obliczenie zbrojenia ławy |
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Przyjęto beton |
B-20 |
fcd= |
10,6 |
Mpa |
fctm= |
1,9 |
Mpa |
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stal |
A-I |
fyd= |
210 |
Mpa |
fyk= |
240 |
MPa |
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Wysokość użyteczna |
cmin= |
0,04 |
Δc= |
0,01 |
Φ= |
0,014 |
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d=h-Cmin-Δc-Φs-0,5*Φ |
d= |
0,687 |
m |
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Φs= |
0,006 |
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Zbrojenie na podporze |
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Zbrojenie w przęśle |
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MB= |
-93,56 |
kNm |
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Mprz= |
66,48 |
kNm |
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As1= |
-7,21 |
cm2 |
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As1= |
5,12 |
cm2 |
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Zbrojenie minimalne |
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Asmin> |
0,26*(fctm/fyk)b*d= |
11,31 |
cm2 |
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0,0013*b*d= |
7,14 |
cm2 |
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Przyjęto zbrojenie przętami 8Φ14 co 100 mm o As1=12,32 cm2 |
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