表1外径D=76mm内径d(dd)=64.00mm壁厚t=6mm截面面积A=1319.47mm2轴心压力N=50kN惯性距Ix=8.14E+05mm4施工荷载P=5kN毛截面抵抗距Wnx=2.14E+04mm3弹性模量E=210000Mpa最大弯距Mx=1.31kN·m抗压强度f=235MPa回转半径ix=24.84mm计算跨度L=1.0m长细比λx=40.26稳定性系数ψx=0.956欧拉临界力N′EX=295.83kN恒载分项系数γG=1活载分项系数γQ=1式5.2.1的压应力σ1=MPa式5.2.2的压应力σ2=MPa101.26满足稳定性要求根据计算出的长细比λx,查稳定性系数ψx(《钢规范》129页)钢管撑的强度及稳定性计算表==========输入数据====================中间过程==============================最终结果及结论====================91.18满足强度要求=钢支撑挠度验算=圆周率л=3.141593密度ρ=(kN/m3)78.5每延米自重q=(kN)0.10357831y0=5ql4/384EI7.88867E-06Ymax=y0/[1-(N/NEX)]9.49315E-06挠度容许值=L/4000.0025λ(fy/235)1/2=40.2584821424.01