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Stability Analysis of Seismically Loaded Slopes Using Finite Element Techniques
When performing pseudo-static finite element (FE) analyses to assess seismic slope stability, there are two commonly used methodologies: the gravity-induced method and the strength reduction technique. The primary difference between these techniques is in the path that is traveled to bring the soil structure to the verge of failure. In the gravity-induced method, the applied load is increased to reach failure while in the strength reduction technique the strength parameters of the soil materials are decreased until the slope fails. In the current study, these two techniques are briefly introduced and a simple approach for their implementation into the FE computer program ABAQUS is provided. The capability of existing failure criteria for predicting the pseudo-static factor of safety (FS) or the critical acceleration (KC) is discussed. Contours of maximum principal plastic strain that are determined using the FE method are shown to strongly parallel the factor of safety map that results from LE analyses. Based on the observations that are made in this study, possible concerns regarding the predictive capability of finite element based techniques for assessing the seismic stability of slopes are discussed.
Stability Analysis of Seismically Loaded Slopes Using Finite Element Techniques
When performing pseudo-static finite element (FE) analyses to assess seismic slope stability, there are two commonly used methodologies: the gravity-induced method and the strength reduction technique. The primary difference between these techniques is in the path that is traveled to bring the soil structure to the verge of failure. In the gravity-induced method, the applied load is increased to reach failure while in the strength reduction technique the strength parameters of the soil materials are decreased until the slope fails. In the current study, these two techniques are briefly introduced and a simple approach for their implementation into the FE computer program ABAQUS is provided. The capability of existing failure criteria for predicting the pseudo-static factor of safety (FS) or the critical acceleration (KC) is discussed. Contours of maximum principal plastic strain that are determined using the FE method are shown to strongly parallel the factor of safety map that results from LE analyses. Based on the observations that are made in this study, possible concerns regarding the predictive capability of finite element based techniques for assessing the seismic stability of slopes are discussed.
Stability Analysis of Seismically Loaded Slopes Using Finite Element Techniques
Khosravi, Mohammad (author) / Leshchinsky, Dov (author) / Meehan, Christopher L. (author) / Khosravi, Ali (author)
Geo-Congress 2013 ; 2013 ; San Diego, California, United States
Geo-Congress 2013 ; 1310-1319
2013-02-25
Conference paper
Electronic Resource
English
Stability Analysis of Seismically Loaded Slopes Using Finite Element Techniques
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