文案大全圆形钢管规格及截面特征表表 2-92直径夕卜径 D（mm）壁厚 t(mm)^£1/1 口11 口 l理论重量（kg/m）外表面积（m2/m）截面特征毛截面惯性矩 I（cm4）毛截面抵抗矩W（cm3）回转半径 i（cm）抗扭惯性矩Ik（cm4）截面重心到边缘距离Z0（cm）(mm)(in)^截^面^面积（cm2）401V2483.54.893.840.151573.55.884.620.17921.147.421.9042.272.85502603.56.214.880.18824.888.302.0049.773.0075.73.88.566.640.23755.1614.592.54110.323.78702%764.09.057.100.23958.8115.482.55117.623.805.011.158.750.23970.6218.592.52141.253.80文案大全8010012515088.54.010.628.340.27894.9921.442.99189.974.43894.010.688.400.28096.6821.733.01193.364.455.013.209.240.280116.7926.242.98233.584.451084.013.0710.300.339176.9532.773.68353.915.406.019.2315.090.339250.9040.463.61501.815.401144.013.8210.850.358209.3536.733.89418.705.701334.016.2112.730.418339.5350.764.56675.056.656.023.9418.790.418483.7272.744.50967.436.651404.519.1615.400.410440.1262.874.79880.247.001594.521.8417.150.500652.2782.055.461304.57.9546.028.8422.640.500845.19106.315.421690.37.958文案大全165200219825027310300325124.522.6917.810.518731.2188.635.681462.418.256.940.1531.520.6882278.7208.107.534557.510.95499.059.3846.610.6883279.1299.467.436558.210.95358.066.6852.280.8585851.7428.709.3711702.13.6534611.090.6271.090.8587782.5570.159.2715565.13.656118.079.6762.541.02110013.616.2411.2120027.16.259481文案大全1.02115531.955.8011.0431063.16.257857注：I——毛截面惯性矩；W—毛截面抵抗矩；i——回转半径；Ik一抗扭惯性矩；Z0—面重心到边缘距离。2-5-3 钢管结构计算1．适用于不直接承受动力荷载，在节点处直接焊接的钢管桁架结构。钢管外径与壁厚之比，不应超过 100（空）。轴心受压方管或矩形管的最大外缘尺寸与壁厚之比，不应超 40［空 fVfy1y2．钢管节点的构造应符合下列要求：（1）主管外径应大于支管外径，主管壁厚不应小于支管壁厚。在支管与主管连接处不得将支管穿入主管内。（2）主管和支管或两支管轴线之间的夹角 q 不宜小于 30。。（3）支管与主管的连接节点处，应尽可能避免偏心。（4）支管与主管的连接焊缝，应沿全周连续焊接并平滑过渡。（5）支管端部宜用自动切管机切割，支管壁厚小于 6mm 时可...
