说明:采用修正经验系数法,按大柱帽无梁筏板计算。混凝土标号:C302.01N/mm2底板板厚h=500mm1.43N/mm2承台厚h=1000mm柱尺寸aXb=0.5X0.5m柱距:LxXLy(m)=8.2X8.2m承台尺寸AXB=2X2m迎水筋保护层C=50mm水位高于底板面3m背水钢筋保护层C=20mm2.5KN/m2计算裂缝C=25mm20KN/m2(扣除向下恒载)㈠.X向柱上板带承台边支座截面负弯矩计算:沿X向总弯矩标准值:Mox=qLy(Lx-C)2/8=20*8.2*(8.2-2)^2/8=788KN*m0.5*788/(8.2/2)=KN*m1.强度计算:底板底筋fy=300N/mm2ho=mm①④号筋每延米筋面积As=1.2*96.1/(0.9*300*443)=964.1mm2实配Φ14@75实配As=2051mm2满足要求!2.裂缝验算:构件受力特征系数αcr=2.1(按砼规表8.1.2-1取)钢筋弹性模量Es=N/mm2(按砼规表4.2.4取)地下室底板抗水板计算二.计算过程:一.基本资料:0.002154431.2Mx/(0.9fyho)=柱上板带每延米弯矩Mx=0.5Mox/By=最小配筋率ρmin=96.1混凝土强度标准值ftk=2.0E+05混凝土强度设计值ft=垫层重水净反力q=实际配筋率ρ=0.0041第1页,共12页σsk=Mk/(0.87hoAs)=96.1/(0.87*443*2051)=N/mm2ρte=As/(0.5bh)=2051/(0.5*1000*500)=0.010.011.1-0.65*2.01/(0.01*121.6)=0.2取ψ=0.22.1*0.2*121.6*(1.9*25+0.08*14/0.01)/200000=0.041mm0.2mm满足要求!㈡.X向柱上板带跨中弯矩及跨中板带弯矩计算:1.沿X向总弯矩标准值:Mox=qLy(Lx-2C/3)2/8=20*8.2*(8.2-2*2/3)^2/8=KN*ma.柱上板带跨中每延米Mx=0.18*967/(8.2/2)=KN*mb.跨中板带支座每延米Mx=0.17*967/(8.2/2)=KN*mc.跨中板带跨中每延米Mx=0.15*967/(8.2/2)=KN*mMx=42.5KN*m1.强度计算:底板面筋fy=300N/mm2ho=mm③号筋每延米筋面积As=1.2Mx/(0.9fyho)=1.2*42.5/(0.9*300*473)=399mm2实配Φ14@100实配As=1539mm2满足要求!2.裂缝验算:构件受力特征系数αcr=2.1(按砼规表8.1.2-1取)钢筋弹性模量Es=N/mm2(按砼规表4.2.4取)σsk=Mk/(0.87hoAs)=42.5/(0.87*473*1539)=N/mm2ρte=As/(0.5bh)=1539/(0.5*1000*500)=0.01取ρte=0.011.1-0.65*2.01/(0.01*67.1)=0.2取ψ=0.22.1*0.2*67.1*(1.9*20+0.08*14/0.01)/200000=0.021mm0.2mm满足要求!㈢.X向承台根部负弯矩计算:沿X向总弯矩标准值:Ly/2=4.122Mox=qLy(Lx-C)2/8=20*8.2*(8.2-0.5)^2/8=KN*m0.5*1215.4/2=KN*m1.强度计算:承台底板底筋fy=300N/mm2ho=mm承台每延米筋面积As=1.2*303.9/(0.9*300*942)=1433.8mm2实配Φ16@75实配As=2679mm2满足要求!2.裂缝验算:构件受力特征系数αcr=2.1(按砼规表8.1.2-1取)钢筋弹性模量Es=N/mm2(按砼规表4.2.4取)σsk=Mk/(0.87hoAs)=303.9/(0.87*942*2679)=N/mm2ρte=As/(0.5bh)=2679/(0.5*1000*1000)=0.010.011.1-0.65*2.01/(0.01*138.4)=0.2取ψ=0.22.1*0.2*138.4*(1.9*25+0.08*16/0.01)/200000=0.051mm0.2mm满足要求!㈣.Y向柱上板带承台边支座截面负弯矩计算:沿Y向总弯矩标准值:Moy=qLx(Ly-C)2/8=20*8.2*(8.2-2)^2/8=788KN*m0.15Mox/By=ωmax=αcrψσsk(1.9c+0.08deq/ρte)/Es=-0.847最小配筋率ρmin=35.4ψ=1.1-0.65ftk/(ρteσsk)=ψ=1.1-0.65ftk/(ρteσsk)=ωmax=αcrψσsk(1.9C+0.08deq/ρte)/Es=0.17Mox/By=承台每延米弯矩Mx=0.5Mox/By=ωmax=αcrψσsk(1.9C+0.08deq/ρte)/Es=0.18Mox/By=2.0E+051.2Mx/(0.9fyho)=67.10.0060.00215取By=121.6底板面筋计算弯矩选用实际配筋率ρ=最小配筋率ρmin=0.0080.02647396742.540.1取ρte=ψ=1.1-0.65ftk/(ρteσsk)=0.156实际配筋率ρ=0.002682.0E+05138.4取ρte=1215.40.0059420.003080.00215303.9第2页,共12页0.5*788/(8.2/2)=KN*m1.强度计算:底板底筋fy=300N/mm2ho=mm②⑥号筋每延米筋面积As=1.2*96.1/(0.9*300*444)=962mm2实配Φ12@75实配As=1507mm2满足要求!2.裂缝验算:构件受力特征系数αcr=2.1(按砼规表8.1.2-1取)钢筋弹性模量Es=N/mm2(按砼规表4.2.4取)σsk=Mk/(0.87hoAs)=96.1/(0.87*444*1507)=N/mm2ρte=As/(0.5bh)=1507/(0.5*1000*500)=0.010.011.1-0.65*2.01/(0.01*165.1)=(0.2ψ1.0)取ψ=0.3092.1*0.309*165.1*(1.9*25+0.08*12/0.01)/200000=0.077mm0.2mm满足要求!㈤.Y向柱上板带跨中弯矩及跨中板带弯矩计算:1.沿Y向总弯矩标准值:Moy=qLx(Ly-2C/3)2/8=20*8.2*(8.2-2*2/3)^2/8=KN*ma.柱上板带跨中每延米My=0.18*967/(8.2/2)=KN*mb.跨中板带支座每延米My=0.17*967/(8.2/2)=KN*mc.跨中板带跨中每延米My=0.15*967/(8.2/2)=KN*mMy=42.5KN*m1.强度计算:底板面筋fy=300N/mm2ho=mm⑤号筋每延米筋面积As=1.2My/(0.9fyho)=1.2*42.5/(0.9*300*473)=399mm2实配Φ14@150实配As=1026mm2不满足要求!2.裂缝验算:构件受力特征系数αcr=2.1(按砼规表8.1.2-1取)钢筋弹性模量Es=N/mm2(按砼规表4.2.4取)σsk=Mk/(0.87hoAs)=42.5/(0.87*473*1026)=N/mm2ρte=As/(0.5bh)=1026/(0.5*1000*500)=0.01取ρte=0.011.1-0.65*2.01/(0.01*100.7)=0.2取ψ=0.22.1*0.2*100.7*(1.9*20+0.08*14/0.01)/200000=0.032mm0.2mm满足要求!㈥.Y向承台根部负弯矩计算:沿Y向总弯矩标准值:Lx/2=4.122Moy=qLx(Ly-C)2/8=20*8.2*(8.2-0.5)^2/8=KN*m0.5*1215.4/2=KN*m1.强度计算:承台底板底筋fy=300N/mm2ho=mm承台每延米筋面积As=1.2*303.9/(0.9*300*941)=1435.4mm2实配Φ18@100实配As=2543mm2满足要求!2.裂缝验算:构件受力特征系数αcr=2.1(按砼规表8.1.2-1取)1.2My/(0.9fyho)=柱上板带每延米弯矩My=0.5Moy/Bx=最小配筋率ρmin=0.0021596.14440.006取ρte=ψ=1.1-0.65ftk/(ρteσsk)=0.309实际配筋率ρ=0.003012.0E+05165.10.17Moy/Bx=40.10.15Moy/Bx=35.4ωmax=αcrψσsk(1.9C+0.08deq/ρte)/Es=9670.18Moy/Bx=42.5实际配筋率ρ=0.002050.0042.0E+05100.7底板面筋计算弯矩选用473最小配筋率ρmin=0.00215实际配筋率ρ=ψ=1.1-0.65ftk/(ρteσsk)=-0.197ωmax=αcrψσsk(1.9C+0.08deq/ρte)/Es=0.00254取Bx=1215.41.2My/(0.9fyho)=承台每延米弯矩My=0.5Moy/Bx=303.9941最小配筋率ρmin=0.00215第3页,共12页钢筋弹性模量Es=N/mm2(按砼规表4.2.4取)σsk=Mk/(0.87hoAs)=303.9/(0.87*941*2543)=N/mm2ρte=As/(0.5bh)=2543/(0.5*1000*1000)=0.010.011.1-0.65*2.01/(0.01*146)=(0.2ψ1.0)取ψ=0.2052.1*0.205*146*(1.9*25+0.08*18/0.01)/200000=0.06mm0.2mm满足要求!取ρte=146ωmax=αcrψσsk(1.9C+0.08deq/ρte)/Es=0.005ψ=1.1-0.65ftk/(ρteσsk)=0.2052.0E+05第4页,共12页说明:采用修正经验系数法,按大柱帽无梁筏板计算。混凝土标号:C302.01N/mm2底板板厚h=400mm1.43N/mm2承台厚h=1000mm柱尺寸aXb=0.6X0.6m柱距:LxXLy(m)=9.3X8.05m承台尺寸AXB=2.5X2.5m迎水筋保护层C=50mm水位高于底板面3.5m背水钢筋保护层C=20mm2.5KN/m2计算裂缝C=25mm26.5KN/m2(扣除向下恒载)㈠.X向柱上板带承台边支座截面负弯矩计算:沿X向总弯矩标准值:Mox=qLy(Lx-C)2/8=26.5*8.05*(9.3-2.5)^2/8=1233KN*m0.5*1233/(8.05/2)=KN*m1.强度计算:底板底筋fy=300N/mm2ho=mm①④号筋每延米筋面积As=1.2*153.2/(0.9*300*342)=1990.9mm2实配Φ16@75实配As=2679mm2满足要求!2.裂缝验算:构件受力特征系数αcr=2.1(按砼规表8.1.2-1取)钢筋弹性模量Es=N/mm2(按砼规表4.2.4取)混凝土强度设计值ft=垫层重水净反力q=实际配筋率ρ=0.00672.0E+05地下室底板抗水板计算二.计算过程:一.基本资料:0.002153421.2Mx/(0.9fyho)=柱上板带每延米弯矩Mx=0.5Mox/By=最小配筋率ρmin=153.2混凝土强度标准值ftk=第5页,共12页σsk=Mk/(0.87hoAs)=153.2/(0.87*342*2679)=N/mm2ρte=As/(0.5bh)=2679/(0.5*1000*400)=0.010.0131.1-0.65*2.01/(0.013*192.2)=(0.2ψ1.0)取ψ=0.5772.1*0.577*192.2*(1.9*25+0.08*16/0.013)/200000=0.17mm0.2mm满足要求!㈡.X向柱上板带跨中弯矩及跨中板带弯矩计算:1.沿X向