三维偏心结构的Pushover分析  

Pushover analysis of 3D eccentric structures

作　　者：李刚[1] 刘永[1] 

机构地区：[1]大连理工大学工程力学系工业装备结构分析国家重点实验室,辽宁大连116023

出　　处：《计算力学学报》2005年第5期529-533,共5页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(5000800359895410)资助项目

摘　　要：Pushover分析方法近年来引起了地震工程界的广泛兴趣,我国新的抗震设计规范已将其作为大震下结构弹塑性变形分析的一种方法。结构不规则性是影响Pushover分析应用的一个主要因素,而加载模式的选取则是Pushover分析的一个关键问题。本文采用FEM A 273建议的3种加载模式对两个典型的三维偏心结构(刚度偏心和质量偏心)进行了Pushover分析,并与非线性动力时程分析的结果进行了比较,给出了三维偏心结构Pushover分析加载模式选取的建议。Pushover analysis has caused much interest in the field of earthquake engineering, and it is suggested as a nonlinear analysis method of the structural deformation under severe earthquake in the new seismic design code in China. Structural irregularity is one important factor that affects the application of pushover method, and selecting an appropriate load patterns is very important in pushover analysis. In the present paper, the pushover analysis of two typical eccentric 3D building structures is studied considering 3 common load patterns suggested by FEMA 273, using ETABS program. The results by pushover analysis are compared with those by nonlinear time history analysis, and some suggestions on the selection of load patterns for eccentric structures are given.

关 键 词：PUSHOVER分析 加载模式 偏心结构 时程分析 

分 类 号：TU352.1[建筑科学—结构工程] TU313