（1 西南交通大学土木工程学院，成都 610031； 2 成都理工大学环境与土木工程学院，成都 610059）

［摘要］采用Pushover法对在5·12地震中遭受损害的什邡电信大楼进行罕遇地震作用下结构的弹塑性分析。研究该结构在罕遇地震作用下的内力、变形与破坏情况，比较不同结构模型在多种加载模式下的动力特性与抗震性能，研究结构在大震作用下的薄弱环节与塑性铰的分布特点。结果表明，不同结构模型在罕遇地震作用下均满足“大震不倒”的抗震设防目标，数值模拟结果与实际破坏情况吻合，且在钟楼上施加荷载与接收塔对结构的地震响应有放大作用。

［关键词］弹塑性；推覆分析；塑性铰；罕遇地震；加载模式

中图分类号：TU313文献标识码：A文章编号：1002-848X(2011)03-0045-05Static elastoplastic analysis of Shifang Telecom building under rare earthquake

Hu Xiao^{1, 2}, Gao Yongtao²

(1 Civil Engineering Department, Southwest Jiaotong University, Chengdu 610031, China；

2 College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China)

Abstract:The Pushover method was applied to an example of Shifang Telecom building which suffered from the 5·12 Earthquake. The deformation, internal force and the damage were investigated. The dynamic property and seismic behavior of different models under multiple loading cases were compared. The weakness of the structure and distribution of plastic hinge were studied. The results show that different models can all meet the‘noncollapse under rare earthquake’requirement of seismic resistance, and the numerical simulation agree well with the reality. The load and the receiving tower imposed on the bell tower can amplify the seismic response.

Keywords: elasto-plasitic; Pushover analysis; plastic hinge; rare earthquake; loading pattern

作者简介：胡潇，博士研究生，讲师，Email：huxiao@cdut.cn。

参考文献

［1］ANIL K C，RAKESH K G.A modal pushover analysis procedure to estimate seismic demands for buildings：Theory and Preliminary Evaluation［R］.PEER Report 2001/03，Pacific Earthquake Engineering Research Center，College of Engineering University of California Berkeley，2001.

［2］GB50011—2001 建筑抗震设计规范［S］.北京：中国建筑工业出版社，2001.

［3］KILAR V，FAJFAR P. Simple Push-over analysis of asymmetric buildings［J］. Earthquake and Engineering and Structural Dynamics，2000，2(3):23-31.

［4］侯爽，欧进萍. 结构Pushover分析的侧向力分布及高阶振型影响［J］.地震工程与工程振动，2004，24（3）：89-97.

［5］毛建猛，谢礼立，翟长海.模态pushover分析方法的研究和改进［J］.地震工程与工程振动，2006，26(6)：50-55.

［6］钱稼茹，罗文斌. 静力弹塑性分析——基于性能/位移抗震设计的分析工具［J］. 建筑结构，2000，30（6）:21-22.