1694


SPRAWDZENIE WARUNKÓW I STANU GRANICZNEGO W POZIOMIE POSADOWIENIA FUNDAMENTU

  1. Przyjęcie głębokości posadowienia i wymiarów w planie.

0x08 graphic

B = 1,9m

L = 1,9m

a = 0,35m

b = 0,15m

c = 0,40m

h = 0,50m

k = 0,60m

d = 0,60m

f = 0,05m

g = 0,60m

  1. Wyznaczenie naprężeń jednostkowych w poziomie posadowienia fundamentu.

qrmax/min=0x01 graphic
0x01 graphic
0x01 graphic
0x01 graphic
0x01 graphic

Nc = N + Qf + Qg

Wy = 0x01 graphic

Wx = 0x01 graphic

0x01 graphic
qrs = 0x01 graphic

Dane:

B = L = 1,9m Qf - ciężar fundamentu

Mx = 28kNm Qg - ciężar gruntu

My = 46kNm

Q = 1060kN

γżelbet = 25kN/m3

Qf = {(a*B) + [0,5*(k+B)*b] + (c*d)}*L* γżelbet

Qf = {(0,35*1,9) + [0,5*(0,6+1,9)*0,15] + (0,4*0,6)}*1,9*25 = (0,665+0,188+0,24)*47,5

= 51,894kN

Qg = [(Dmin*B*L) - 0x01 graphic
]*ρg*g

Qg = [(0,8*1,9*1,9) - 0x01 graphic
]*1,635*9,81 = (2,888 - 2,076)*16,039 = 13,028kN

Nc = 1060 + 51,894 + 13,028 = 1124,922kN

Wy = 0x01 graphic
= 1,143m3 Wx = 0x01 graphic
= 1,143m3

qrmax = 0x01 graphic
+0x01 graphic
+0x01 graphic
= 311,613 + 24,497 + 40,245 = 376,355kPa

qrmin = 0x01 graphic
- 0x01 graphic
- 0x01 graphic
= 311,613 - 24,497 - 40,245 = 246,871kPa

qr2 = 0x01 graphic
+0x01 graphic
-0x01 graphic
= 311,613 + 24,497 - 40,245 = 295,865kPa

qr3 = 0x01 graphic
- 0x01 graphic
+ 0x01 graphic
= 311,613 - 24,497 + 40,245 = 327,361kPa

qrs = 0x01 graphic
= 311,613kPa

  1. Ustalenie jednostkowego oporu obliczeniowego podłoża.

qf = (1+0,30x01 graphic
)*NC(r) * Cu(r) + (1+1,50x01 graphic
)*ND(r) * Dmin * ρD * g + (1-0,250x01 graphic
)*NB(r) * B * ρB * g

Dmin = 0,8m

ρD(r) = 1,635*0,9 = 1,472t*m-3

ρB(r) = [0x01 graphic
]*0,9 = [0x01 graphic
]*0,9= [0x01 graphic
]*0,9 = 1,664t*m-3

g = 9,81m/s2

NC(r) = 0x01 graphic
= 0x01 graphic
= 0x01 graphic
= 24,159

ND(r) = 0x01 graphic
= 0x01 graphic
= 0x01 graphic
= 13,378

NB(r) = 0x01 graphic
= 0x01 graphic
= 0x01 graphic
= 4,756

Cu(r) = 0

qf = (1+0,30x01 graphic
)*24,159* 0 +(1+1,50x01 graphic
)*13,378* 0,8 * 1,472 * 9,81 +(1-0,250x01 graphic
)* 4,756 * 1,9 * 1,664 * 9,81 = 2,5 * 154,546 + 0,75 * 147,509 = 386,365 + 110,632 = 496,826kPa

  1. Sprawdzenie warunku obliczeniowego I stanu granicznego.

Qr 0x01 graphic
m * Qf

qrs0x01 graphic
m * qf

qmax 0x01 graphic
1,2 * m * qf

qrs = 311,613 0x01 graphic
0,7 * 496,826

qrs = 311,613 0x01 graphic
347,779

qmax = 376,3550x01 graphic
1,2 * 0,7 * 496,826

qmax = 376,355 0x01 graphic
417,334

0x01 graphic



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