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Title: Observations on limit equilibrium-based slope reliability problems with inclined weak seams
Authors: Ching, J.
Phoon, K.-K. 
Hu, Y.-G.
Keywords: Importance sampling
Monte Carlo simulation
Reliability analysis
Slope stability
Issue Date: Oct-2010
Citation: Ching, J., Phoon, K.-K., Hu, Y.-G. (2010-10). Observations on limit equilibrium-based slope reliability problems with inclined weak seams. Journal of Engineering Mechanics 136 (10) : 1220-1233. ScholarBank@NUS Repository.
Abstract: This study addresses the complexity of slope reliability problems based on limit equilibrium methods (LEMs). The main focus is on the existence of multiple failure modes that poses difficulty to many LEM-based slope reliability methods. In particular, when weak seams are present, the failure modes associated with those seams may be difficult to detect. A systematic way of searching the failure modes is proposed, and its robustness over slopes with or without weak seams is demonstrated. It is found that in the presence of weak seams, assuming circular slip surfaces may cause underestimation of slope failure probability. The conclusion of the study promotes the use of finite elements as the stability method for reliability evaluation because it is not necessary to search for failure surfaces in finite-element stability analysis. © 2010 ASCE.
Source Title: Journal of Engineering Mechanics
ISSN: 07339399
DOI: 10.1061/(ASCE)EM.1943-7889.0000160
Appears in Collections:Staff Publications

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