低周反复荷载作用下高强钢柱有限元分析

文中在试验研究的基础上运用有限元软件对Q690箱型与H形截面的高强钢柱进行建模分析,通过对比数值模拟结果与试验结果,研究高强钢柱在低周反复荷载作用下的滞回性能。结果表明有限元模拟的试件破坏现象与试验观察到的现象一致,均为柱底出现板件局部屈曲,形成塑性铰,导致试件承载力下降至失效,但有限元模拟的试件承载力比试验得到的试件承载力要高。

FINITE ELEMENT ANALYSIS OF HIGH-STRENGTH STEEL COLUMNS UNDER CYCLIC LOADS

Based on the experimental research, this paper analyze the Q690 box and H-section high-strength steel column by finite element software. The performance of high-strength steel column under low-cycle repeated loading is studied by comparing the numerical simulation results and the test results. The results show that the failure phenomenon of the specimens simulated by the finite element method is consistent with the observed phenomenon. The local buckling of the plate at the bottom of the column occurs, forming a plastic hinge, which causes the bearing capacity of the specimen to decline to failure. Finally, the higher bearing capacity of the specimen is obtained by finite element method.