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DOI	10.1016/j.gsf.2017.09.010
	Finite-element 3D modeling of stress patterns around a dipping fault
	Lobatskaya, R. M.; Strelchenko, I. P.; Dolgikh, E. S.
通讯作者	Lobatskaya, RM (通讯作者)
发表日期	2018
ISSN	1674-9871
起始页码	1555
结束页码	1563
卷号	9 期号:5
英文摘要	Stresses in a block around a dipping fracture simulating a damage zone of a fault are reconstructed by finite-element modeling. A fracture corresponding to a fault of different lengths, with its plane dipping at different angles, is assumed to follow a lithological interface and to experience either compression or shear. The stress associated with the destruction shows an asymmetrical pattern with different distances from the highest stress sites to the fault plane in the hanging and foot walls. As the dip angle decreases, the high-stress zone becomes wider in the hanging wall but its width changes negligibly in the foot wall. The length of the simulated fault and the deformation type affect only the magnitude of maximum stress, which remains asymmetrical relative to the fault plane. The L-h/L-f ratio, where L-h and L-f are the widths of high-stress zones in the hanging and foot walls of the fault, respectively, is inversely proportional to the fault plane dip. The arithmetic mean of this ratio over different fault lengths in fractures subject to compression changes from 0.29 at a dip of 80 degrees to 1.67 at 30 degrees. In the case of shift displacement, ratios are increasing to 1.2 and 2.94, respectively. Usually they consider vertical fault planes and symmetry in a damage zone of faults. Following that assumption may cause errors in reconstructions of stress and fault patterns in areas of complex structural setting. According geological data, we know the structures are different and asymmetric in hanging and foot walls of fault. Thus, it is important to quantify zones of that asymmetry. The modeling results have to be taken into account in studies of natural faults, especially for practical applications in seismic risk mapping, engineering geology, hydrogeology, and tectonics. (C) 2017, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V.
关键词	INTERNAL STRUCTURE FRACTAL ANALYSIS FIELD OBSERVATIONS ZONES SEISMICITY FRACTURES JAPAN
英文关键词	Stress; Fault; Finite-element modeling; ANSYS package
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000442691400020
来源期刊	GEOSCIENCE FRONTIERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259137
推荐引用方式 GB/T 7714	Lobatskaya, R. M.,Strelchenko, I. P.,Dolgikh, E. S.. Finite-element 3D modeling of stress patterns around a dipping fault[J]. 中国科学院青藏高原研究所,2018,9(5).
APA	Lobatskaya, R. M.,Strelchenko, I. P.,&Dolgikh, E. S..(2018).Finite-element 3D modeling of stress patterns around a dipping fault.GEOSCIENCE FRONTIERS,9(5).
MLA	Lobatskaya, R. M.,et al."Finite-element 3D modeling of stress patterns around a dipping fault".GEOSCIENCE FRONTIERS 9.5(2018).