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Geotechnical design with apparent seismic safety factors well-bellow 1
Affiliation:1. Key Laboratory of the Earth׳s Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;2. Beijing Chinese Language and Culture College, Beijing 102206, China;1. School of Civil Engineering, Dalian University of Technology, Dalian 116024, China;2. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;1. MSSMat (UMR 8579) CNRS/CentraleSupélec, Grande voie des Vignes, 92290 Châtenay-Malabry, France;2. Department of Civil Engineering and Engineering Mechanics, Columbia University, 630 SW Mudd, 500 West 120th Street, New York, NY 10027, USA;1. Blavatnik School of Computer Science, Tel Aviv University, Israel;2. Computer Science Department, University of California, Los Angeles, United States;1. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, China;2. College of Civil Engineering, Tongji University, China
Abstract:The paper demonstrates that whereas often in seismic geotechnical design it is not realistically feasible to design with ample factor of safety against failure as is done in static design, an “engineering” apparent seismic factor of safety less than 1 does not imply failure. Examples from slope stability and foundation rocking illustrate the concept. It is also shown that in many cases it may be beneficial to under-design the foundation by accepting substantial uplifting and/or full mobilization of bearing capacity failure mechanisms.
Keywords:Nonlinear soil–structure interaction  Seismic analysis  Pseudo-static analysis  Foundations  Rocking  Slopes
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