【摘要】 长周期地震动对高层结构的影响在日本"311地震"后进一步受到关注,日本学者在E-defense振动台上进行了一20层高层RC框架1/4缩尺模型的加载试验,研究了长周期地震动作用下高层结构的响应及破坏特征;本文在介绍其主要试验结果的基础上,基于SNAP软件建立梁端部集中塑性铰杆单元、柱纤维单元的有限元模型,进行弹塑性时程分析再现试验结果;进一步考虑长周期地震动作用下高层结构长持时、大位移响应特征,对梁端恢复力模型考虑累积塑性损伤修正,计算结果与试验结果吻合良好。更多还原

【Abstract】 The response of high-rise structure under long period ground motion( LPGM) gets more and more attention after‘311 earthquake’in Japan. To investigate the dynamic response and failure characteristics of frame structure,a 1 /4 scale model of a 20 layers RC frame subjected to LPGM was tested on E-defense shaking table by Japanese scholars recently. The typical experimental results were introduced by firstly. And then the nonlinear behavior observed in the test was reproduced by using the finite element analysis( FEM) software SNAP,in which the behavior of beam and column were modeled by plastic hinge and fiber models respectively. Based on the FEM model,the two particular characteristics( long duration and vast displacement response) of high-rise frame structure subjected to LPGM were simulated. The two characteristics caused notable cumulative damage on beam end,which was considered by using a revised plastic hinge model in FEM simulation. The comparative analysis method was verified by the good agreements of the tested and simulated results.更多还原