低周往复荷载下楔形H形钢短梁滞回性能Ⅱ:数值模拟

Hysteresis of tapered H-section steel short beam with thin web under cycling loadⅡ:numerical analysis

基于ANSYS工作平台,建立所完成的7个楔形薄腹H形钢短梁试验试件的数值分析模型,对其进行循环往复荷载作用下的全过程分析,分析中考虑双重非线性、初始几何缺陷、残余应力等因素的影响。将循环荷载下试验试件的数值计算结果与试验结果进行对比分析,讨论试件破坏形态、滞回曲线、最大承载力等方面的对比结果。分析结果表明:数值模拟能够较好地反映试件的试验结果,所采用的数值分析模型和数值方法可以进行楔形薄腹H形钢构件的数值模拟分析。

Using nonlinear finite element method, a numerical model is constructed to investigate the hysteretic behavior of tapered H-section members, with the effects of local imperfections of the web, yielding, residual stress and large deflections taken into account. The accuracy of the numerical model is verified by comparing the numerical analysis with the experiment of seven H-section steel short beams under low cyclic reversed loading, with focus on local buckling, failure mode, hysteretie curve and ultimate bearing capacity.