Simulation of the Load-Unload Response Ratio and Critical Sensitivity in the Lattice Solid Model

doi:10.1007/s00024-002-8746-3

IMECH-IR > 力学所知识产出(1956-2008)

	Simulation of the Load-Unload Response Ratio and Critical Sensitivity in the Lattice Solid Model
	Mora P; Wang YC(王裕仓); Yin C; Place D; Yin XC(尹祥础); Mora, P (reprint author), Univ Queensland, Dept Earth Sci, QUAKES, Brisbane, Qld 4072, Australia.
发表期刊	Pure and Applied Geophysics
	2002
卷号	159 期号:10 页码:2525-2536
ISSN	0033-4553
摘要	The Load-Unload Response Ratio (LURR) method is an intermediate-term earthquake prediction approach that has shown considerable promise. It involves calculating the ratio of a specified energy release measure during loading and unloading where loading and unloading periods are determined from the earth tide induced perturbations in the Coulomb Failure Stress on optimally oriented faults. In the lead-up to large earthquakes, high LURR values are frequently observed a few months or years prior to the event. These signals may have a similar origin to the observed accelerating seismic moment release (AMR) prior to many large earthquakes or may be due to critical sensitivity of the crust when a large earthquake is imminent. As a first step towards studying the underlying physical mechanism for the LURR observations, numerical studies are conducted using the particle based lattice solid model (LSM) to determine whether LURR observations can be reproduced. The model is initialized as a heterogeneous 2-D block made up of random-sized particles bonded by elastic-brittle links. The system is subjected to uniaxial compression from rigid driving plates on the upper and lower edges of the model. Experiments are conducted using both strain and stress control to load the plates. A sinusoidal stress perturbation is added to the gradual compressional loading to simulate loading and unloading cycles and LURR is calculated. The results reproduce signals similar to those observed in earthquake prediction practice with a high LURR value followed by a sudden drop prior to macroscopic failure of the sample. The results suggest that LURR provides a good predictor for catastrophic failure in elastic-brittle systems and motivate further research to study the underlying physical mechanisms and statistical properties of high LURR values. The results provide encouragement for earthquake prediction research and the use of advanced simulation models to probe the physics of earthquakes.
学科领域	力学
DOI	10.1007/s00024-002-8746-3
收录类别	SCI
语种	英语
WOS记录号	WOS:000177938400018
关键词[WOS]	EARTHQUAKE PREDICTION ; NUMERICAL-SIMULATION ; LURR THEORY ; FAULTS
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
引用统计	被引频次：23[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/16711
专题	力学所知识产出(1956-2008)
通讯作者	Mora, P (reprint author), Univ Queensland, Dept Earth Sci, QUAKES, Brisbane, Qld 4072, Australia.
推荐引用方式 GB/T 7714	Mora P,Wang YC,Yin C,et al. Simulation of the Load-Unload Response Ratio and Critical Sensitivity in the Lattice Solid Model[J]. Pure and Applied Geophysics,2002,159,10,:2525-2536.
APA	Mora P,王裕仓,Yin C,Place D,尹祥础,&Mora, P .(2002).Simulation of the Load-Unload Response Ratio and Critical Sensitivity in the Lattice Solid Model.Pure and Applied Geophysics,159(10),2525-2536.
MLA	Mora P,et al."Simulation of the Load-Unload Response Ratio and Critical Sensitivity in the Lattice Solid Model".Pure and Applied Geophysics 159.10(2002):2525-2536.

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