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	Effect of the free surface on the earthquake energy: a case study of reverse faulting
	Li YanHeng1; Shi BaoPing1,2; Zhang Jian1
刊名	Chinese science bulletin
	2009-07-01
卷号	54期号:13页码:2271-2278
关键词	Energy partitioning Representation theorem Thrust fault Apparent stress Response of surface
ISSN号	1001-6538
DOI	10.1007/s11434-009-0042-5
通讯作者	Li yanheng(liyanh06b@mails.gucas.ac.cn)
英文摘要	Based on the representation theorem of seismic energy radiation, in this study, we have quantitatively investigated the effect of free surface on the radiation energy distribution due to a coupling interaction between free surface and near surface finite fault for the reverse earthquake faulting. corresponding to the finite faulting, a 2-d pseudostatic-reverse-fault-dislocation solution has been used in the calculation of the work done by the seismic response against free surface. the results indicate that, due to a strong coupling interaction between the free surface and near surface fault, the total radiated seismic energy e (r) is much larger than that radiated only from the fault itself (e (f)), especially for the shallow reverse faulting. in convention, e (f) is commonly used in the estimation of earthquake energy radiation. however, when the fault depth h, the distance between the free surface and top of fault location, increases, the effect of the coupling interaction between the fault and free surface decreases gradually. therefore, the total radiated energy e (r) approaches to the e (f) when the depth h is about 2 times the fault length i. the current study could provide us a partial explanation of the apparent stress discrepancy observed at the far field and near field in the recent large earthquake. moreover, the current study also has a significant implication of how to quantitatively describe the near fault strong ground motion and associated seismic hazard from the earthquake source energy point of view.
WOS关键词	MODEL
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000267669100019
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2395285
专题	中国科学院大学
通讯作者	Li YanHeng
作者单位	1.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 2.Chinese Earthquake Adm, Inst Crustal Dynam, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Li YanHeng,Shi BaoPing,Zhang Jian. Effect of the free surface on the earthquake energy: a case study of reverse faulting[J]. Chinese science bulletin,2009,54(13):2271-2278.
APA	Li YanHeng,Shi BaoPing,&Zhang Jian.(2009).Effect of the free surface on the earthquake energy: a case study of reverse faulting.Chinese science bulletin,54(13),2271-2278.
MLA	Li YanHeng,et al."Effect of the free surface on the earthquake energy: a case study of reverse faulting".Chinese science bulletin 54.13(2009):2271-2278.

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