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结构构件计算书第1页,共4页柱间支撑计算项目名称_____________日期_____________设计者_____________校对者_____________一、示意图支撑类型:双层格构斜杆受力假定:受拉斜杆截面示意图:撑杆截面示意图:二、依据规范《钢结构设计规范》(GB50017-2003)三、计算信息1.荷载信息剪力设计值:F1=150.000kN;F2=150.000kN;2.杆件参数双肢间距:k=300mm;结构构件计算书第2页,共4页斜杆:参数名称参数值型号L75X8b(mm)75t(mm)8A(mm2)1150.00Ixo(mm4)599600.00Iyo(mm4)599600.00ixo(mm)22.80iyo(mm)22.80撑杆:参数名称参数值型号L90X8b(mm)90t(mm)8A(mm2)1394.00Ixo(mm4)1.06×106Iyo(mm4)1.06×106ixo(mm)27.60iyo(mm)27.603.几何尺寸h2=4500mm;h3=4500mm;B=6000mm;b1=200mm;b2=200mm4.连接信息肢尖焊缝高度:hf1=8.0mm;肢背焊缝高度:hf2=8.0mm;焊缝长度:LHf1=300mm;LHf2=300mm;LHf3=200mm;安装螺栓直径:d=16mm;节点板厚度:δ=8.0mm;5.容许长细比拉杆容许长细比[λ1]=400;压杆容许长细比[λ2]=2006.材料信息钢材等级:Q235钢材强度:f=215N/mm2四、内力计算上斜杆长度Lsx=(h32+(B-b1-b2)2)1/2=(45002+(6000-200-200)2)1/2=7184.0mm下斜杆长度Lxx=(h22+(B-b1-b2)2)1/2=(45002+(6000-200-200)2)1/2=7184.0mm水平宽度Lc=B-b1-b2=6000-200-200=5600mm上斜杆拉力Nsl=F1×Lsx/Lc=150.000×7184.0/5600.0=192.429kN下斜杆拉力Nxl=(F1+F2)×Lxx/Lc=(150.000+150.000)×7184.0/5600.0=384.858kN撑杆压力Nc=F1+F2=150.000+150.000=300.000kN五、截面验算1.强度验算依据《钢结构设计规范》(GB50017-2003)1)斜杆结构构件计算书第3页,共4页杆件的净截面面积:An=A-d0×t=1150.00-(16+1.5)×8.0=1010.00mm2截面应力σ=Nl/An≤f(5.1.1-1)σ=384.86×1000/(1010.00×2)=190.524N/mm2≤f=215N/mm2,满足要求!2)撑杆杆件的净截面面积:An=A-d0×t=1394.00-(16+1.5)×8=1254.00mm2截面应力σ=Nl/An≤f(5.1.1-1)σ=300.00×1000/(1254.00×2)=119.617N/mm2≤f=215N/mm2,满足要求!2.长细比验算λ=l0/i≤[λ]1)斜杆受拉:组合截面惯性矩:Ix=2·(Iyo+A·(k/2-xo)2)=2×(599600.00+1150.00×(300.00/2-21.50)2)=3.918×107mm4Iy=2·Ixo=2×599600.00=1.199×106mm4组合截面回转半径:ix=(Ix/(2·A))1/2=(3.92×107/(2×1150.00))1/2=130.513mmiy=(Iy/(2·A))1/2=(1.20×106/(2×1150.00))1/2=22.834mmλx=l0/ix=7184.01/130.51=55.044≤400.000,λy=l0/iy=7184.01/22.83=314.619≤400.000,满足要求!2)撑杆:组合截面惯性矩:Ix=2·(Iyo+A·(k/2-xo)2)=2×(1.06×106+1394.00×(300.00/2-25.20)2)=4.555×107mm4Iy=2·Ixo=2×1.06×106=2.129×106mm4组合截面回转半径:ix=(Ix/(2·A))1/2=(4.56×107/(2×1394.00))1/2=127.823mmiy=(Iy/(2·A))1/2=(2.13×106/(2×1394.00))1/2=27.636mmλx=l0/ix=5600.00/127.82=43.811≤200.000,λy=l0/iy=5600.00/27.64=202.631换算长细比:λ0y=sqrt(λy2+(595/iy)2)=sqrt(202.632+(595/27.64)2)=203.772>200.000,不满足要求!3.稳定验算撑杆受压稳定:根据规范表查得X轴为b类截面,Y轴为b类截面Фx=0.883,Фy=0.180。取Ф=0.180截面正应力σ=N/(Ф·A)≤f(5.1.2-1)=300000.000/(0.180×2788.000)=598.081N/mm2>f=215N/mm2,不满足要求!六、连接验算依据:《钢结构设计规范》(GB50017-2003)Lhf1焊缝验算:肢尖:hf1=8mmV=0.3·max(Nxl,Nsl)/2=0.3×max(384.86,192.43)/2=57.729kNlw=Lhf1-2·hf1=300-2×8=284.0he=0.7·hf1=0.7×8=5.6mm查表得:ffw=160N/mm2结构构件计算书第4页,共4页τ=V/(lw·he)=57.729×103/(284.0×5.6)=36.298N/mm2≤ffw=160N/mm2,满足要求!肢背:hf2=8mmV=0.7·max(Nxl,Nsl)/2=0.7×max(384.86,192.43)/2=134.700kNlw=Lhf1-2·hf2=300-2×8=284.0he=0.7·hf2=0.7×8=5.6mm查表得:ffw=160N/mm2τ=V/(lw·he)=134.700×103/(284.0×5.6)=84.696N/mm2≤ffw=160N/mm2,满足要求!Lhf2焊缝验算:肢尖:hf1=8mmlw=Lhf2-2·hf1=300-2×8=284.0he=0.7·hf1=0.7×8=5.6mm查表得:ffw=160N/mm2τ=V/(lw·he)=57.729×103/(284.0×5.6)=36.298N/mm2≤ffw=160N/mm2,满足要求!肢背:hf2=8mm查表得:ffw=160N/mm2τ=V/(lw·he)=134.700×103/(284.0×5.6)=84.696N/mm2≤ffw=160N/mm2,满足要求!Lhf3焊缝验算:肢尖:hf1=8mmV=0.5·NC/2=0.5×300.00/2=75.000kNlw=Lhf3-2·hf1=200-2×8=184.0he=0.7·hf1=0.7×8=5.6mm查表得:ffw=160N/mm2τ=V/(lw·he)=45.000×103/(184.0×5.6)=43.672N/mm2≤ffw=160N/mm2,满足要求!肢背:hf2=8mmV=0.7·Nc/2=0.7×300.00/2=105.000kN查表得:ffw=160N/mm2τ=V/(lw·he)=105.000×103/(184.0×5.6)=101.902N/mm2≤ffw=160N/mm2,满足要求!
本文标题:柱间支撑计算11
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