高层框架结构E-defense振动台试验弹塑性时程对比分析  

Comparative analysis of E- defense shaking table test and nonlinear time history simulation for high-rise frame structure

作　　者：马华[1] 曹飞[1] 唐贞云[2] 李振宝[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124 [2]北京工业大学城市交通学院,北京100124

出　　处：《地震工程与工程振动》2015年第1期143-149,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金资助项目(51178014;51078011)

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。The response of high-rise structure under long period ground motion （LPGM） gets more and more atten- tion 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 be- havior 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 mod- el, 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.

关 键 词：长周期地震动 高层RC框架 E-defense振动台试验 弹塑性时程分析 累积损伤 

分 类 号：TU317[建筑科学—结构工程] TU973