Stress field and modeling of instability mechanism of Yushu M(s)7.1 earthquake

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	Stress field and modeling of instability mechanism of Yushu M(s)7.1 earthquake
	Wang, LJ (Wang Lian-Jie)6; Wang, W (Wang Wei); Cui, JW (Cui Jun-Wen); Sun, DS (Sun Dong-Sheng); Qiao, ZJ (Qiao Zi-Jiang); Zhao, WH (Zhao Wei-Hua)
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2011
卷号	54 期号:11 页码:2779-2787
关键词	Yushu earthquake Earthquake modeling Strain-softening model Unsteady model of earthquake
ISSN号	0001-5733
英文摘要	The stress field and velocity field in Yushu region are analyzed. On this basis, the earthquake mechanism of magnitude M(s)7.1 on April 14, 2010, in Qinghai Yushu is simulated by numerical method with strain softening model. Fault and surrounding rock is considered as a unified system of geological media, considering surrounding rock as elastic body, fault as the elastic-plastic strain softening body. Yushu M(s)7.1 earthquake occurrs in stress field formed by northward compressing of Indian plat and southeast compressing of Qinghai-Tibet Plateau. Under the effect of stress and pore pressure and boundary displacement, stress is gradual accumulated. When stress reaches the strength of damage of fault, the fault displacement softening is produced, fault sliding suddenly, the energy releasing suddenly, a sudden drop in stress resulting, a earthquake occuring. According to this process, earthquake of Yushu earthquake of M(s)7.1 is modeled. The stress drop, energy release amount, the magnitude of dislocation of fault, and earthquake recurrence intervals are given by modeling. Comparison of the modeling results with the results of geologic survey in the field shows that they are in good agreement.
学科主题	构造地质学
WOS研究方向	Geochemistry & Geophysics
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000297535900008
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39450]
专题	中国地质调查局
作者单位	1.[Wang Lian-Jie 2.Wang Wei 3.Sun Dong-Sheng 4.Qiao Zi-Jiang 5.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 6.中国地质科学院地质力学研究所
推荐引用方式 GB/T 7714	Wang, LJ ,Wang, W ,Cui, JW ,et al. Stress field and modeling of instability mechanism of Yushu M(s)7.1 earthquake[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(11):2779-2787.
APA	Wang, LJ ,Wang, W ,Cui, JW ,Sun, DS ,Qiao, ZJ ,&Zhao, WH .(2011).Stress field and modeling of instability mechanism of Yushu M(s)7.1 earthquake.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(11),2779-2787.
MLA	Wang, LJ ,et al."Stress field and modeling of instability mechanism of Yushu M(s)7.1 earthquake".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.11(2011):2779-2787.