文档介绍：第 44 卷第 7 期土木工程学报 Vol. 44 No. 7
2 0 1 1 年 7 月 CHINA CIVIL ENGINEERING JOURNAL Jul. 2011
建筑结构弹塑性时程分析中地震动记录
选取方法的比较研究
曲哲叶列平潘鹏
,
清华大学教育部结构工程与振动重点实验室北京 100084

摘要选择合适的地震动记录是采用弹塑性时程分析预测建筑结构地震响应的基础。列举了现有针对不同分析目
的的三种地震动记录选取方法,比较了按不同方法建立的地震动记录选择集的地面运动峰值和反应谱特性,并通
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过分析两个不同初始周期框架结构的弹塑性地震响应对不同地震动记录选取方法的分析结果进行了比较。研究
结果表明,基于设计反应谱和基于最不利地震动的选取方法均与结构的初始周期相关,当结构在地震作用下刚度
,
退化比较明显时这些方法有可能难以达到预期的目标而当地震动强度指标恰当、且选取的地震动记录数量较多
时,基于台站和地震信息的选取方法不会造成过大的结构弹塑性地震响应的离散性,同时这种方法不依赖于结构
, , ,
的动力特性操作简便适用性强适于在研究不同结构类型和不同动力特性建筑结构的抗震性能时应用。
关键词建筑结构弹塑性时程分析地震动记录地震动强度反应谱
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中图分类号 TU312 . 1 文献标识码 A

文章编号 1000-131X 2011 07-0010-12
Comparative study on methods of selecting earthquake ground motions for
nonlinear time history analyses of building structures
Qu Zhe Ye Lieping Pan Peng
,
Key Laboratory of Structural Engineering and Vibration of the Ministry of Education
, ,
Tsinghua University Beijing100084 China

Abstract Careful selection of earthquake ground motions forms the basis for performing nonlinear time history analyses
of building structures. Different methods of selecting earthquake ground motions should be used in accordance with the
purpose of the time history analyses. The applicability and applicable conditions of typical selection methods are
discussed. Features of the earthquake ground motion sets established by different methods pared in terms of the
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ground motion peak values frequency contents and nonlinear seismic responses of building structures. The results show
that the method based on design spectra and the method based on most-unfavorable earthquake may sometimes be unable
,
to fulfill the aim of the selection due to their dependency on the initial vibration period of the structures especially when
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the structure suffers significant stiffness degradation during the earthquake. On the other hand the earthquake ground
motions selected by the method based on the station /earthquake information would n