Identification of representative slip surfaces for reliability analysis of soil slopes based on shear strength reduction |
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| Institution: | 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education and Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;2. Department of Civil Engineering and Risk Engineering and System Analytics Center, Clemson University, Clemson, SC 29634, USA;3. State Key Laboratory of Ocean Engineering, Civil Engineering Department, Shanghai Jiaotong University, Shanghai 200240, China;4. ARC Centre of Excellence for Geotechnical Science and Engineering, The University of Newcastle, Callaghan, NSW 2308, Australia;1. Department of Geotechnical Engineering and Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, 1239 Siping Road, Shanghai 200092, China;2. Shaanxi Key Laboratory for Property and Treatment of Special Rock and Soil, China Jikan Research Institute of Engineering Investigations and Design, Co., Ltd., 51 Xianning Middle Road, Xi''an, Shaanxi 710043, China;1. School of Civil Engineering, Central South University, 410075 Changsha, China;2. Department of Geotechnical Engineering, School of Civil Engineering, Southwest Jiaotong University, 610031 Chengdu, China;1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing, 100124, China;1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education and Department of Geotechnical Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China;2. Department of Civil Engineering, University of Akron, Akron, OH 44325, USA |
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| Abstract: | Although a slope may have numerous potential slip surfaces, its failure probability is often governed by several representative slip surfaces (RSSs). Previous efforts mainly focus on the identification of circular RSSs based on limit equilibrium methods. In this paper, a method is suggested to identify RSSs of arbitrary shape based on the shear strength reduction method. Monte Carlo simulation is used to generate a large number potential slip surfaces. The RSSs are identified through analyzing the failure domains represented by these samples. A kriging-based response surface model is employed to enhance the computational efficiency. These examples shows that the RSSs may not always be circular, and that the suggested method can effectively locate the RSSs without making prior assumptions about the shape of the slip surfaces. For the examples investigated, the system failure probabilities computed based on the shear strength reduction method are comparable to, but not the same as those computed based on the limit equilibrium methods. The suggested method significantly extends our capability for identifying non-circular RSSs and hence probabilistic slope stability analysis involving non-circular slip surfaces. |
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| Keywords: | Slope stability Uncertainty Reliability Response surface method |
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