竖向不规则结构的静力推覆分析

在强烈地震作用下,结构的薄弱层往往率先发生弹塑性变形集中,甚至造成结构局部或整体倒塌。而静力弹塑性分析(Push-over)方法作为一种简单而有效的结构抗震能力评价工具,可以较为快捷地判明结构的薄弱部位,并用于指导结构的抗震设计。本文简要介绍了Push-over分析的实施步骤,并运用结构通用分析软件SAP2000对几种典型不规则形式的结构进行了分析,说明Push-over分析方法在探测结构薄弱部位方面的实用性。

Push-over Analysis of the Vertically Irregular Frames

Under strong earthquake,the weak story of a structure always leads to the centralization of elasto-plastic deformation and collapse.As a simple but effective tool for the assessment of structural seismic capacity,Push-over analysis may conveniently distinguish the weakness of structures,which play an important part in the seismic design.This paper presents a concise introduction to the Push-over analysis method and several irregular frames are studied by SAP2000 based on Push-over analysis.It is concluded that Push-over analysis can detect the weakness of structures effectively.