Rupture phase diagrams for a planar fault in 3-D full-space and   half-space

doi:10.1093/gji/ggv284

CORC > 北京大学 > 地球与空间科学学院

	Rupture phase diagrams for a planar fault in 3-D full-space and half-space
	Xu, Jiankuan ; Zhang, Haiming ; Chen, Xiaofei
刊名	GEOPHYSICAL JOURNAL INTERNATIONAL
	2015
关键词	Earthquake dynamics Dynamics and mechanics of faulting Fractures and faults Mechanics Theory and Modelling SLIP-WEAKENING FRICTION FINITE-VOLUME METHOD DYNAMIC RUPTURE SUPERSHEAR RUPTURE LABORATORY EARTHQUAKES 3-DIMENSIONAL DYNAMICS ELASTIC MEDIUM SHEAR CRACKS PROPAGATION TRANSITION
DOI	10.1093/gji/ggv284
英文摘要	In this study, we have systematically investigated the influence of the parameters of the slip-weakening law and the size of nucleation asperity on dynamic rupture of a planar fault in full-space and half-space using the boundary integral equation method, in particular, the occurrence conditions for subshear (or sub-Rayleigh for strike-slip rupture) and supershear ruptures. Besides the well-known rupture styles of subshear (or sub-Rayleigh) and supershear, we defined a new kind of rupture style in this study, termed the 'self-arresting rupture', for which the rupture process can be autonomously arrested by itself without any outside interference (e.g. a high strength barrier). Based on the vast number of simulations, we obtained rupture phase diagrams for strike-slip and dip-slip ruptures vertically and obliquely embedded in half-space and full-space with different buried depths. The rupture phase diagram clearly illustrates the occurrence conditions of three kinds of rupture styles and the transitions between them. In full-space, the supershear transition is sensitive with the fault width. Owing to the influence of the free surface, the rupture in half-space becomes much more complicated comparing to the one in full-space. For a strike-slip fault with zero buried depth, all ruptures that occur within the parameter range for sub-Rayleigh ruptures in full-space case become supershear ruptures. This means that as long as a rupture is able to grow incessantly, it will always evolve into a supershear rupture. For dip-slip faults, however, ruptures will always propagate with subshear speed, although slip rate could be almost twice that of a strike-slip fault. Although the influence of the free surface is strong, it is limited to very shallow ruptures (i.e. buried depth < 1 km). The rupture phase diagram discussed in this study could provide a new insight on earthquake rupture mechanics.; National Science Foundation of China [41474037, 41274053, 41174035]; Fundamental Research Funds for the Central Universities [WK2080000073]; Chinese Academy of Sciences; State Administration of Foreign Experts Affairs International Partnership Program for Creative Research Teams; SCI(E); EI; ARTICLE; xfchen1@ustc.edu.cn; 3; 2194-2206; 202
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/416788]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Xu, Jiankuan,Zhang, Haiming,Chen, Xiaofei. Rupture phase diagrams for a planar fault in 3-D full-space and half-space[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2015.
APA	Xu, Jiankuan,Zhang, Haiming,&Chen, Xiaofei.(2015).Rupture phase diagrams for a planar fault in 3-D full-space and half-space.GEOPHYSICAL JOURNAL INTERNATIONAL.
MLA	Xu, Jiankuan,et al."Rupture phase diagrams for a planar fault in 3-D full-space and half-space".GEOPHYSICAL JOURNAL INTERNATIONAL (2015).