Q460C高强度钢柱滞回性能有限元分析

Finite element analysis on hysteretic behavior of Q460C high strength steel box-section and H-section columns

为进一步研究Q460C高强度钢柱的滞回性能,在已有试验研究的基础上,采用通用有限元分析软件ANSYS建立了数值模型,对Q460C高强度钢材焊接箱形和H形截面柱在常轴力和水平往复荷载作用下的滞回性能进行模拟,并研究了残余应力对高强度钢试件滞回性能的影响。将有限元分析结果与已有试验结果进行对比,两者吻合较好。研究结果表明:采用提出的Q460C高强度结构钢滞回模型进行有限元分析,能较为准确的预测Q460C高强度钢材焊接H形和箱形柱的滞回性能;试件内残余应力对Q460C高强度钢材焊接H形和箱形截面柱的滞回性能影响较小。

In order to further study the hysteretic behavior of Q460C high strength steel columns, a finite element （FE） model was built up by using general FE analysis software ANSYS based on previous experimental study. Both welded box and H-section columns under constant axial load and horizontal cyclic loading were simulated. Moreover, the effect of residual stresses on the hysteretic behavior of Q460C steel welded box and H-section columns was evaluated. The FE analysis result shows good agreement with the existing experimental results conducted by authors. The proposed hysteretic model for Q460C high strength steel is proved to be accurate to be implemented in the numerical analysis. The comparison of FE analysis results with and without considering initial residual stresses shows that the influence of residual stresses on hysteretic behavior of Q460C high strength steel columns is negligible.