A comparative study of pseudo-static slope stability analysis using different design codes  

作　　者：Xin-guang Yang En-di Zhai Yuan Wang Zhong-bo Hu 

机构地区：[1]Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China [2]Goldwind Science & Technology Co., Ltd., Beijing 100176, China [3]College of Mechanics and Materials, Hohai University, Nanjing 210098, China [4]China Three Gorges Corporation, Beijing 100038, China

出　　处：《Water Science and Engineering》2018年第4期310-317,共8页水科学与水工程（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2017YFC0404804);the National Natural Science Foundation of China(Grant No.51509019)

摘　　要：Many researchers have developed new calculation methods to analyze seismic slope stability problems, but the conventional pseudo-static method is still widely used in engineering design due to its simplicity. Based on the Technical Code for Building Slope Engineering（GB 50330-2013） of China and the Guidelines for Evaluating and Mitigating Seismic Hazards in California（SP117）, a comparative study on the pseudo-static method was performed. The results indicate that the largest difference between these two design codes lies in determination of the seismic equivalence reduction factor( f;). The GB 50330-2013 code specifies a single value for f;of 0.25. In SP117, numerous factors,such as magnitude and distance, are considered in determining f;. Two case studies show that the types of slope stability status evaluated by SP117 are in agreement with those evaluated by the seismic time-history stability analysis and Newmark displacement analysis. The factors of safety evaluated by SP117 can be used in practice for safe design. However, the factors of safety evaluated by GB 50330-2013 are risky for slope seismic design.Many researchers have developed new calculation methods to analyze seismic slope stability problems, but the conventional pseudo-static method is still widely used in engineering design due to its simplicity. Based on the Technical Code for Building Slope Engineering(GB 50330-2013) of China and the Guidelines for Evaluating and Mitigating Seismic Hazards in California(SP117), a comparative study on the pseudo-static method was performed. The results indicate that the largest difference between these two design codes lies in determination of the seismic equivalence reduction factor( f_(eq)). The GB 50330-2013 code specifies a single value for f_(eq) of 0.25. In SP117, numerous factors,such as magnitude and distance, are considered in determining f_(eq). Two case studies show that the types of slope stability status evaluated by SP117 are in agreement with those evaluated by the seismic time-history stability analysis and Newmark displacement analysis. The factors of safety evaluated by SP117 can be used in practice for safe design. However, the factors of safety evaluated by GB 50330-2013 are risky for slope seismic design.

关 键 词：EARTHQUAKE Slope stability Pseudo-static method Design code 

分 类 号：TV[水利工程]