圓形鋼管規(guī)格及截面特征表

實(shí)用標(biāo)準(zhǔn)圓形鋼管規(guī)格及截面特征表表2-92直徑截面特征截面重截面面毛截面外徑D壁厚t理論重量外表面積毛截面回轉(zhuǎn)半抗扭慣心到邊積抵抗矩（mm）（mm）（kg/m）（m2/m）慣性矩I徑i性矩Ik緣距離（mm）（in）2W（cm）44（cm）（cm3）（cm）（cm）Z0（cm）401?483.54.893.840.151502573.55.884.620.17921.147.421.9042.272.85603.56.214.880.18824.888.302.0049.773.0075.73.88.566.640.23755.1614.592.54110.323.78702?764.09.057.100.23958.8115.482.55117.623.805.011.158.750.23970.6218.592.52141.253.8088.54.010.628.340.27894.9921.442.99189.974.43803894.010.688.400.28096.6821.733.01193.364.455.013.209.240.280116.7926.242.98233.584.451084.013.0710.300.339176.9532.773.68353.915.4010046.019.2315.090.339250.9040.463.61501.815.401144.013.8210.850.358209.3536.733.89418.705.701334.016.2112.730.418339.5350.764.56675.056.6512556.023.9418.790.418483.7272.744.50967.436.651404.519.1615.400.410440.1262.874.79880.247.0015061594.521.8417.150.500652.2782.055.461304.547.956.028.8422.640.500845.19106.315.421690.387.95文案大全實(shí)用標(biāo)準(zhǔn)1654.522.6917.810.518731.2188.635.681462.418.252002196.940.1531.520.6882278.74208.107.534557.5910.9589.059.3846.610.6883279.13299.467.436558.2510.952738.066.6852.280.8585851.73428.709.3711702.413.6525010611.090.6271.090.8587782.56570.159.2715565.113.6513258.079.6762.541.02110013.9616.2411.2120027.816.25300124113.0124.42100.031.02115531.7955.8011.0431063.516.2587注：——毛截面慣性矩；——毛截面抵抗矩；i——回轉(zhuǎn)半徑；Ik——抗扭慣性矩；0——截面重心到邊緣距離。IWZ2-5-3 鋼管結(jié)構(gòu)計(jì)算1．適用于不直接承受動(dòng)力荷載，在節(jié)點(diǎn)處直接焊接的鋼管桁架結(jié)構(gòu)。鋼管外徑與壁厚之比，不應(yīng)超過 100（234）。軸心受壓方管或矩形管的最大外緣尺寸與壁厚之比，不應(yīng)超 40 234。fy fy2．鋼管節(jié)點(diǎn)的構(gòu)造應(yīng)符合下列要求：（1）主管外徑應(yīng)大于支管外徑，主管壁厚不應(yīng)小于支管壁厚。在支管與主管連接處不得將支管穿入主管內(nèi)。（2）主管和支管或兩支管軸線之間的夾角θ i不宜小于 30°。（3）支管與主管的連接節(jié)點(diǎn)處，應(yīng)盡可能避免偏心。文案大全實(shí)用標(biāo)準(zhǔn)（4）支管與主管的連接焊縫，應(yīng)沿全周連續(xù)焊接并平滑過渡。（5）支管端部宜用自動(dòng)切管機(jī)切割，支管壁厚小于 6mm時(shí)可不切坡口。3．支管與主管的連接可沿全周用角焊縫， 也可部分用角焊縫、部分用對(duì)接焊縫，支管管壁與主管管壁之間的夾角大于或等于 120°的區(qū)域宜用對(duì)接焊縫或帶坡口的角焊縫。角焊縫的焊腳尺寸hf不宜大于支管壁厚的兩倍。4．支管與主管的連接焊縫為全周角焊縫，按下式計(jì)算，但取βf＝1：fNfffwhelw，當(dāng)支管軸心受力時(shí)取0.7hf。角焊縫的計(jì)算長(zhǎng)度lw，按下列公式計(jì)算：角焊縫的有效厚度he（1）在圓管結(jié)構(gòu)中取支管與主管相交線長(zhǎng)度：式中 d、di——主管和支管外徑；θi——主管軸線與支管軸線的夾角。（2）在矩形管結(jié)構(gòu)中，支管與主管交線的計(jì)算長(zhǎng)度，對(duì)于有間隙的 K形和N形節(jié)點(diǎn)：文案大全實(shí)用標(biāo)準(zhǔn)對(duì)于T、Y、X形節(jié)點(diǎn)lw

2hisin i式中 hi、bi——分別為支管的截面高度和寬度。5．為保證節(jié)點(diǎn)處主管的強(qiáng)度，支管的軸心力不得大于表 2-95規(guī)定的承載力設(shè)計(jì)值：支管軸心力的承載力設(shè)計(jì)值表2-95文案大全實(shí)用標(biāo)準(zhǔn)文案大全實(shí)用標(biāo)準(zhǔn)文案大全實(shí)用標(biāo)準(zhǔn)圓管結(jié)構(gòu)的節(jié)點(diǎn)形式見圖 2-2。文案大