对结构静力弹塑性分析方法的几点改进  

Some Improvement on Pushover Analysis Procedure

作　　者：刘清山[1] 梁兴文[1] 黄雅捷 

机构地区：[1]西安建筑科技大学,西安710055 [2]上海市政工程设计研究院,上海200092

出　　处：《建筑科学》2005年第4期28-33,共6页Building Science

基　　金：陕西省自然科学基金项目(2001C26);陕西省教育厅专项基金项目(01JK169)

摘　　要：探讨了结构静力弹塑性分析方法的基本原理,指出了该方法目前存在的缺陷,基于模态Pushover法(MPA)提出了根据振型参与重量来确定对结构地震反应起主要影响的振型数以及两阶段的侧向力加载模式,并对确定结构目标位移的方法作了一些改进。采用动力时程分析法和改进的静力弹塑性方法,对一个优化钢框架结构的地震反应进行了数值模拟分析,其结果表明,采用本文改进的静力弹塑性分析方法对结构进行推覆分析,能较准确地模拟结构的地震反应,具有易操作、计算精度高的优点。In this paper, some limitations of pushover analysis procedure are indicated after investigations of its basic method. The numbers of the principle modes controlling the structural seismic response are calculated by means of modal partition weight. Two-stage lateral load pattern, based on the load pattern of modal pushover analysis procedure and the improvement of method for target displacements are put forward. The simulation of the earthquake response of a optimization steel frame structure by using both the non- linear time history analysis and the improved pushover analysis procedure shows that the simulation of the structural seismic response with the improved pushover analysis procedure is simpler more and accurate than others.

关 键 词：静力弹塑性分析 侧向荷载分布模式 目标位移 振型参与重量 

分 类 号：TU312.1[建筑科学—结构工程] TU313