复杂应力下H形钢悬臂柱柱脚焊缝热点应力分析
发布时间：2019-08-19 16:47
【摘要】：H形钢悬臂柱柱脚焊缝的疲劳性能对钢柱疲劳寿命起控制作用,应用热点应力的表面外推法,通过建立数值计算模型,对弯矩、扭矩和弯扭共同作用下柱脚焊缝热点应力进行了分析。选取翼缘与底板厚度比(t_1/t_2)、翼缘和腹板厚度比(t_1/t_3)、腹板厚度(t_3)与型钢截面高度(h)作为影响因素,对热点应力集中系数SCFhs进行参数分析。分析结果表明,其它条件不变的情况下,弯矩作用下的热点应力集中系数SCFmhs随着(t_1/t_3)和(t_3)的增大而减小,但与(t_1/t_2)关系不大,h增加可导致SCFhs增大,建议取为1.40;扭矩作用下的热点应力集中系数SCFths随着(t_1/t_2)和(t_3)的增大而减小,但与(t_1/t_3)关系不大,h增加可导致SCFths增大,建议取为1.20;弯扭共同作用下的热点应力集中系数SCFmths随着(M/T)的增大而增大,建议取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，
本文编号：2528379
[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，
本文编号：2528379
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