颗粒离散单元法地震动力时程计算黏性人工边界及其应用

doi:10.13722/j.cnki.jrme.2016.0426

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Abstract In order to avoid the outward waves being reflected back into the simulated domain at the artificial boundaries，the absorbing boundaries must be used in applying the granular discrete element method(PFC). To consider the various radii of particle elements on the artificial boundaries and the irregular boundary surfaces，the equivalent equation applicable for this discrete elements method was obtained based on the continuum viscous boundary condition. The calibration factors were introduced into the equivalent equation and a method to determine their values necessary for the optimum wave absorption was proposed. The joint network models of bedding and reverse bedding rock slopes were established with the synthetic rock mass approach (SRM). The viscous boundary conditions were built on the artificial boundaries in PFC models of rock slope based on the proposed method. At the same time，the seismic failure process of bedding and reverse bedding rock slopes with orthogonal secondary rock joints were simulated and systematic analyses of the seismic failure mechanism were conducted.

Key words： slope engineering granular discrete element method viscous artificial boundary rock slope seismic failure mechanism

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	Articles by authors
	ZHOU Xingtao1
	2
	SHENG Qian1
	LENG Xianlun1
	FU Xiaodong1
	CUI Zhen1

Cite this article:

ZHOU Xingtao1,2,SHENG Qian1, et al. Viscous artificial boundary for seismic dynamic time-history analysis with granular discrete element method and its application[J]. , 2017, 36(4): 928-939.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2016.0426 OR http://www.rockmech.org/EN/Y2017/V36/I4/928

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