地下室外墙计算书1、土容重 γ＝ 18 静止土压力系数 K0= .7 混凝土强度设计值：fc= 14.3 钢筋强度设计值：fy= 360 2、地下室参数：d1＝ 350 临水面保护层厚度：a1= 50 内侧保护层厚度：a2= 20 h1＝： .25 h2= 5.1 h3= 4.35 钢筋直径 d= 20 混凝土法律规范要求最小配筋率 ρmin＝： .002 容许裂缝宽度[w]= .22 3、内力计算：q1a=q1b=K0*q＝ 7 q2aa = K0 * γ * (H1 - H2)= 6.3 q2bb = K0 * (γ- 10) * hh3= 24.36 q2b=q2aa + q2bb= 30.66 q3b = 10 * hh3= 43.5 qa = q1a + q2a + q3a= 7 qb = q1b + q2b + q3b= 81.16 Mb1k =q1b * xb * xb / 8 * (2 - beta) * (2 - beta)= 22.64951 α= a / h2= 4.901961E-02 根据《建筑结构静力计算手册》计算，Mb2k = q2aa * hh2 * hh2 / 8 * (2 - beta) * (2 - beta)-Ra0 * hh2 -+q2aa * xc * xb2 / 2+q2bb * hh3 * hh3 * (4 - 3 * beta + 0.6 * beta * beta) / 24 = 58.27822 α= (h2-h3) / h2= 4.901961E-02 Mb3k = q3b * h3 * h3 * (4 - 3 * β + 0.6 * β * β) / 24= 64.3989 根据《建筑结构静力计算手册》计算，先求出剪力为零处,h5= 2.264692 Mdk =Mx3 = -(q2 / xb1 / 6) * x * x * x + (-0.5 * q1 + xa1 * q2 / xb1 / 2) * x * x + (Ra2 + Ra1 + xa * q1 - Ra3 - 0.5 * xa1 * xa1 * q2 / xb1 + 0.5 * xc * q3) * x + xa1 * xa1 * xa1 * q2 / xb1 / 6 - 0.5 * xa * xa * q1 - 0.5 * xa2 * xc * q3= 64.52717 Mbk = Mb1k + Mb2k + Mb3k= 145.3266 Mb = 1.35*Mbk= 196.1909 Md = 1.35*Mdk= 87.11168 4、外墙外侧强度计算：α = Mb * 1000000 / (fc * b * h0 * h0)= .1631349 γ = 0.5 * (1 + Sqr(1 - 2 * α))= .9104053 As = 1000000 * Mb / (fy * γ * h0)= 2064.161 另一侧强度计算：α = Md * 1000000 / (fc * b * h0 * h0)= .0587528 γ = 0.5 * (1 + Sqr(1 - 2 * α))= .9697059 As = 1000000 * Md / (fy * γ * h0)= 774.9577 5、裂缝计算：裂缝计算所需钢筋面积:As= 3455.752 Ate = 0.5 * b * h0= 150000 ρte=As/Ate= .023 σsq＝Mk/(0.87*h0*As)= 166.68 ψ =1.1-0.65*ftk/(ρte*σsq)= .76 ωbmax=αcr*ψ*σsq*(1.9*c+0.08*deq/ρte)/Es= .198 选用钢筋:φ 20 ＠ 90 As= 3491 配筋率 ρb= .0099 另一侧裂缝计算：裂缝计算所需钢筋面积:As= 1005.31 Ate = 0.5 * b * h0= 165000 ρte=As/Ate= .01 σsq＝Mq/(0.87*h0*As)= 229.122 ψ =1.1-0.65*ftk/(ρte*σsq)= .53 ωdmax=αcr*ψ*σsq*(1.9*cs+0.08*deq/ρte)/Es= .191 选用钢筋:φ 16 ＠ 200 As= 1005 配筋率 ρd= .0029
