地下室外墙计算,挡土墙计算,裂缝计算cc(2)

Ｍmax=Q墙顶X-q11X2/2+（q22-q11）X3/6H=44.44449KN·M

（四）配筋计算

混凝土抗压强度fcd=16.7

ho=265

钢筋设计强度fy=360

计算宽度b=1000N/mm2mmN/mm2mmＭ支座 =fcdbx(h0-x/2)

130230625.00 =

x =

得

As = Ｍ支座/(ho-x/2)/fy =1492

Ｍmax =fcdbx(h0-x/2)

44000000.00 =16700x(265-x/2)

x =10.136 mm≤

解得

跨中As = Ｍmax/(ho-x/2)/fy =483

（五）裂缝计算

钢筋直径d=18

钢筋间距100

每延米实配钢筋As=2544.69mmmmmm2

-108.53KN·M

184.983N/mm2mm2ξbh0 =0.53×265.00 =mm216700x(265-x/2)31.273 m≤ξbh0 =0.53×265.00 =标准组合下Ｍk支座=-H2×（8q2+7q1）/120=σsk=Ｍk支座/(0.87hoAs)=

αcr=2.1

ρte=0.0169646

ftk=2.2

ψ=0.644319395

所以ψ取0.644319395

Es=200000

c=25

deq=18

裂缝宽度Wfk=0.165673631mm<1 且>0.2裂缝满足要求