【摘要】：H形鋼懸臂柱柱腳焊縫的疲勞性能對鋼柱疲勞壽命起控制作用,應(yīng)用熱點應(yīng)力的表面外推法,通過建立數(shù)值計算模型,對彎矩、扭矩和彎扭共同作用下柱腳焊縫熱點應(yīng)力進行了分析。選取翼緣與底板厚度比(t_1/t_2)、翼緣和腹板厚度比(t_1/t_3)、腹板厚度(t_3)與型鋼截面高度(h)作為影響因素,對熱點應(yīng)力集中系數(shù)SCFhs進行參數(shù)分析。分析結(jié)果表明,其它條件不變的情況下,彎矩作用下的熱點應(yīng)力集中系數(shù)SCFmhs隨著(t_1/t_3)和(t_3)的增大而減小,但與(t_1/t_2)關(guān)系不大,h增加可導致SCFhs增大,建議取為1.40;扭矩作用下的熱點應(yīng)力集中系數(shù)SCFths隨著(t_1/t_2)和(t_3)的增大而減小,但與(t_1/t_3)關(guān)系不大,h增加可導致SCFths增大,建議取為1.20;彎扭共同作用下的熱點應(yīng)力集中系數(shù)SCFmths隨著(M/T)的增大而增大,建議取1.05 SCFths。
[Abstract]:The fatigue properties of the foot weld of H-shaped steel cantilever column play an important role in controlling the fatigue life of steel column. By using the surface extrapolation method of hot spot stress, the hot spot stress of column foot weld under the combined action of bending moment, torque and bending and torsion is analyzed by establishing a numerical calculation model. The ratio of flange to bottom plate thickness (t_1/t_2), flange and web thickness ratio (t_1/t_3), web thickness (t 鈮，

本文編號：2528379