Spectral and intensity indices of near-fault ground motions based on different focal mechanisms

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	Spectral and intensity indices of near-fault ground motions based on different focal mechanisms
	Du, Yongfeng 1,2; Xu, Tianni 2; Hong, Na 2
刊名	Tumu Gongcheng Xuebao/China Civil Engineering Journal
	2017-05-01
卷号	50 期号:5 页码:81-87
关键词	Elastoplasticity Runge Kutta methods Seismic response State space methods Base isolated structure Correlation analysis Focal mechanism Ground motions Site conditions
ISSN号	1000131X
英文摘要	In this study, 118 near-fault pulse ground motion records are classified according to different soil conditions and focal mechanisms, based on the simplified model of base-isolated structural system of two degrees of freedom, the elastic-plastic response spectra are obtained by using state-space method and fourth-order Runge-Kutta method, and the effects of site conditions and focal mechanism on structural response spectra are analyzed. In order to explore the selection problems of the intensity indices for seismic response analysis of base-isolated structure, the correlation between elastic-plastic structural responses and intensity indices composed of PGA, PGV and PGD are discussed. The results show that the average acceleration response spectra under the reverse fault ground motions and the average displacement response spectra under reverse oblique fault ground motions are largest, but the laws of average velocity response spectra are not obvious in three site conditions. For different site conditions and focal mechanisms, the correlation degrees between intensity indices and structural response are different. Hence, when studying the seismic response of base-isolated structure under near-fault ground motions, it is recommended to select and adjust ground motion inputs using different intensity indices with different site condition and focal mechanisms considered. © 2017, Editorial Office of China Civil Engineering Journal. All right reserved.
语种	中文
出版者	Editorial Office of China Civil Engineering Journal
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114364]
专题	土木工程学院
作者单位	1.Western Center of Disaster Mitigation in Civil Engineer of Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China 2.Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Du, Yongfeng,Xu, Tianni,Hong, Na. Spectral and intensity indices of near-fault ground motions based on different focal mechanisms[J]. Tumu Gongcheng Xuebao/China Civil Engineering Journal,2017,50(5):81-87.
APA	Du, Yongfeng,Xu, Tianni,&Hong, Na.(2017).Spectral and intensity indices of near-fault ground motions based on different focal mechanisms.Tumu Gongcheng Xuebao/China Civil Engineering Journal,50(5),81-87.
MLA	Du, Yongfeng,et al."Spectral and intensity indices of near-fault ground motions based on different focal mechanisms".Tumu Gongcheng Xuebao/China Civil Engineering Journal 50.5(2017):81-87.