断面参数计算公式表断面面积NO.断面形状中性轴到截面上最远点的距离惯性矩IAe截面系数I Z =e回转半径 ρ=IAae1aa21a2a412a36a12=2aa2aa3ae4a33a3=a3ea2a2?0.707aaa412a3?0.118a362a12=b4a－ba221a2a4－b412a4－b46aa2?b2?0.289a2?b212aa5beaa－b22eba2?0.707aa4－b412a4－b42(a4－b4)?0.118a12aa2＋b2?0.289a2＋b212断面参数计算公式表断面面积NO.断面形状中性轴到截面上最远点的距离惯性矩IAe截面系数I Z =e回转半径 ρ=IAbe1bd1d2bd312bd26dd12?0.289d2bbddbd33bd33d?0.577d3b3dedebdhdb2＋d2b3d36(b2＋d2）b2d26b＋d22bd?0.4086(b2＋d2）b2＋d2bd4ebhdαbd1(dcos?＋bsin?)2bd22(dcos?＋b2sin2?)12bd?d2cos2?＋b2sin2?????6?dcos?＋bsin???d2cos2?＋b2sin2?12?0.289?d2cos2?＋b2sin2?e5bbd－hk1d2bd3－hk312bd3－hk36dbd3－hk312(bd－hk）bd3?hk3?0.289bd－hkdk断面参数计算公式表断面面积NO.断面形状中性轴到截面上最远点的距离惯性矩IAe截面系数I Z =e回转半径 ρ=IAAe1dπd2?0.7854d24d2πd4?0.049d464πd3?0.098d332d42edd(D2－d2）π4?0.7854(D2－d2）D2π(D4－d4)?640.049(D4－d4)π(D4－d4)0.098(D4－d4)?32DDD2＋ｄ24Dtae3hdldt＋2a(s＋n)d2?11?3(h4－l4)??bd?4g12??ただしg?つばの勾配?h－l1?b－t6ns1?3144?bd－(h－l)?4g6d???1?3144?bd－(h－l)?4g12???dt＋2a(s＋n)blndt＋2a(s＋n)b241?3g44?3b(d－h)＋lt＋(b－l)?12?4??ただしg?つばの勾配g41?334?(bd)?－＋＋－b(dh)lt46b???IAbhdtansedt＋a(s＋n)ate5d21?3144?bd－(h－l)?12?8g??ただしg?つばの勾配其中g=斜边的斜度?h－l1?2(b－t)61?3144?bd－(h－l)??8g6??1?3144?bd－(h－l)?12?8g??dt＋a(s＋n)dblh断面参数计算公式表断面面积NO.断面形状中性轴到截面上最远点的距离惯性矩IA2eht2gb－[bs＋＋(b－t)2＋23(b＋2t)]?A ただしg?つばの勾配其中g=斜边的斜度?h－l2(b－t)截面系数I Z =e回转半径 ρ=IAAse1nhdt＋a(s＋n)b1?3g?2sb＋lt3＋(b4－t4)??3?2?－A(b－e)2ただしg?つば勾配其中g=斜边的斜度tIeIAaldt2eDdbd－h(b－t)d2bd3－ｈ3(b－t)12bd3－h3(b－t)6dbd3－h3(b－t)12[bd－h(b－t）]bs3ebthbd－h(b－t)shb22sb3＋ht3122sb3＋ht36d2sb3＋ht312[bd－h(b－t）]dbtbdh4bd－h(b－t)sed2ebd3－h3(ｂ－t)12bd3－h3(b－t)6dbd3－h3(b－t)12[bd－h(b－t）]se5hbd－h(b－t)2b2s＋ht2b－2bd－2h(b－t)2sb3＋ht3－A(b－t)23IeIAtdb断面参数计算公式表断面面积NO.断面形状bs中性轴到截面上最远点的距离惯性矩IAe截面系数I Z =e回转半径 ρ=IAA1tatbs＋ht?asd－[d2t＋s2(b－t)＋s(a－t)(2d－s)]?2A1[b(d－e)3＋ae3－(b－t)3(d－e－s)3－(a－t)(e－s)3]DaeseIeIAhd2t（2a - t)ata2＋at－t2a－2(2a－t)te3＋a(a－e)3－(a－t)(a－e－t)33IeIA3ebebh22h3bh336bh224bb4h(2b?b1)213b?2b1?h32b?b1h6b2?6bb1?b123h36(2b?b1)6b2?6bb1?b122h12(3b?2b1)beb12b12he5te3t?0.866t4332t2 ?2.598t2534t?0.5413t41653t86t533t?0.5413t316t
断面计算公式
