Seismic stability analysis of slopes with pre-existing slip surfaces

doi:10.1007/s11629-017-4759-3

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2018 > Vol15 No.6

	Seismic stability analysis of slopes with pre-existing slip surfaces
	Su, LJ; Sun, CN; Yu, FW; Ali, S
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2018
卷号	15 期号:6 页码:1331-1341
关键词	Slope stability Pre-existing slip surface Seismic loading Limit analysis Yield acceleration Permanent displacement
ISSN号	1672-6316
DOI	10.1007/s11629-017-4759-3
文献子类	Article
英文摘要	In analyzing seismic stability of a slope with upper bound limit analysis method, the slip surface is often assumed as a log-spiral or plane slip surface. However, due to the presence of a weak layer and unfavorable geological structural surface or a bedrock interface with overlying soft strata, the preexisting slip surface of the slope may be irregular and composed of a series of planes rather than strictly log-spiral or plane shape. A computational model is developed for analyzing the seismic stability of slopes with pre-existing slip surfaces. This model is based on the upper bound limit analysis method and can consider the effect of anchor bolts. The soil or rock is deemed to follow the Mohr-Coulomb yield criterion. The slope is divided into multiple block elements along the slip surface. According to the displacement compatibility and the associated flow rule, a kinematic velocity field of the slope can be obtained computationally. The proposed model allows not only calculation of the rate of external work owing to the combined effect of self-weight and seismic loading, but also that of the energy dissipation rate caused by the slip surface, interfaces of block elements and anchorage effect of the anchors. Considering a direct relationship between the rate of external work and the energy dissipation rate, the expressions of yield acceleration and permanent displacement of anchored slopes can be derived. Finally, the validity of this proposed model is illustrated by analysis on three typical slopes. The results showed that the proposed model is more easily formulated and does not need to solve complex equations or time consuming iterations compared with previous methods based on the conditions of force equilibrium.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000435362700013
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/35512]
专题	Journal of Mountain Science_Journal of Mountain Science-2018_Vol15 No.6
推荐引用方式 GB/T 7714	Su, LJ,Sun, CN,Yu, FW,et al. Seismic stability analysis of slopes with pre-existing slip surfaces[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(6):1331-1341.
APA	Su, LJ,Sun, CN,Yu, FW,&Ali, S.(2018).Seismic stability analysis of slopes with pre-existing slip surfaces.JOURNAL OF MOUNTAIN SCIENCE,15(6),1331-1341.
MLA	Su, LJ,et al."Seismic stability analysis of slopes with pre-existing slip surfaces".JOURNAL OF MOUNTAIN SCIENCE 15.6(2018):1331-1341.