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几何图荷载图内力图一:数据输入1:柱几何参数Hc=0mm(上柱高)HL=9000mm(下柱高)H=HC+HL=9000mm1.1估算截面输出b=500mm(H/40)h1=500mm(HL/25)1.2柱截面输入b=500mm(柱截面宽)h1=500mm(下柱截面高)h2=500mm(上柱截面高)2:风荷载计算wo=0.75mm2us=0.8uz=1.52B=12m(迎风面宽度)3.材料信息混凝土强度等级C35钢筋强度等级:HRB335受弯构件最小配筋率:ρmin=0.2%钢筋保护层厚度30mm二:输出信息1.材料信息混凝土轴心抗压设强度计值fc=16.7Mpa混凝土抗风柱计算(2011)钢筋等级fy=300Mpa2.风荷载q=10.944KN/m3:柱顶反力I1=bxh13/12=5.21E+09mm4I2=bxh23/12=5.21E+09mm4n=I2/I1=1.00λ=HC/HL=0.00S1=(1/n-1)=0.00S2=1+λ4S1=1.00S3=1+λ3S1=1.00C11=0.375S2/S3=0.38R=C11XqxH=36.94KN4:内力(标准值)VB=R=36.94KNVA=R-qxH=-61.56KNMC=0.5qxHc2-RXHC=0.00KN.mMA=0.5qXH2-RXH=110.81KN.m三:受弯承载力计算:1:上柱C截面MC=0.00KN.mαs=M/bh02.fc=0.00ξ=1-√(1-2αs)=0.00γ=[1+√(1-2αs)]/2=1.00As=M/γ.fy.h0=0mm2As'=ρminB*h0=458mm2AS=458mm22:下柱A截面MA=155.13KN.mαs=M/bh02.fc=0.09ξ=1-√(1-2αs)=0.09γ=[1+√(1-2αs)]/2=0.95As=M/γ.fy.h0=1185mm2As'=ρminB*h0=458mm2AS=1185mm2抗风柱基础计算简图一:数据输入1.地基承载力特征值fak=180kpa基础埋深d=2m承载力深度修正系数ηd=1承载力宽度修正系数ηb=0估算基础宽度S=1.4m估算基础长度L=1.8m基础高度H=400mm基底以上土平均容重γm=18KN/m3抗风柱处山墙高Hw=10m(室内地坪算起)墙体容重γq=5KN/m2墙体厚ht=240mm3.材料信息混凝土强度等级C25钢筋强度等级:HRB400最小配筋率:ρmin=0.15%钢筋保护层厚度40mm二:输出信息1.材料信息混凝土轴心抗压设强度计值fc=11.9Mpa钢筋等级fy=360Mpa207kpa3.荷载信息3.1轴力信息下柱自重GC1=25bh1=6.25KN上柱自重GC2=25BH2=6.25KN基础范围墙重Gw=SHwγq=70KNFk=GC1+GC2+GW=82.5KN基底以上土和基础自重G=50.4KN3.2弯矩信息MA=110.81KN.me1=(h1-h2)/2=0me2=(ht+h1)/2=0.37mMG=GC1e1+Gwe2=-25.9KN.m抗风柱基础计算(2006)2.fa=fak+ηbγ(b-3)+ηdγm=Mk=MA+MG=84.91KN.m3.3剪力信息VK=VA=-61.56KNMv=Vk(d-1)=-61.56KN.m三:地基承载力复核基底面积A=SL=2.52m2基底面积矩W=SL2/6=0.76m3e=(Mk+Mv)/(Fk+G)=0.18mL/6=0.30meL/6Pkmax=(Fk+G)/A+(Mk+Mv)/W=83.62kpa1.2fak,满足Pkmin=(Fk+G)/A-(Mk+Mv)/W=21.85kpaPk=(Pmax+Pmin)/2=52.74kpafak,满足四:受弯承载力计算:1.恒活荷载控制判断Pg=(Fk+G)/A=52.74kpaPq=(Mk+Mv)/W=30.88kpaPg/Pq=1.711.211.27α=1.27Pmax=αPkmax=106.52kpaPmin=αPkmin=27.84kpa4.内力计算a1=(L-h1)/2-0.05=0.6ma'=b+0.1=0.6mb'=h1+0.1=0.6m80.30kpaG=60.48KN=15.26KN.mMⅡ=(S-a')2(2L+b')(Pmax+Pmin-2G/A)/48=0.69KN.m五:配筋计算As1=MⅠ/0.9fy.h0=136mm2As'=ρminB*h0=730mm2AS1=730mm2405.42mm2/mP=Pmin+(Pmax-Pmin)x(L-a1)/L=MⅠ=a12〔(2S+a')(Pmax+P-2G/A)+(Pmax-P)S]/122.恒载控制组合系数α=(1.35Pg+0.7X1.4Pq)/(Pg+pg)=3.活载控制组合系数α=(1.2Pg+1.4Pq)/(Pg+Pq)=As1=MⅡ/0.9fy.h0=6.14mm2As'=ρminB*h0=9382.50mm2AS1=9383mm2521.25mm2/m
本文标题:混凝土抗风柱计算
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