Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Multi Hazard Analysis of Earth Slopes Using Coupled Geotechnical-Hydrological Finite Element Model
The purpose of this study is to analyze the stability and deformation behaviors of earth slopes subjected to common natural hazards such as rainfall, toe erosion induced by the flood, earthquake, and simultaneous occurrence of rainfall-erosion and rainfall-earthquake. A coupled geotechnical-hydrological finite element software, PLAXIS 2D which is capable of coupling deformation and flow behavior of soil with varying degree of saturation was used. First, a two-dimensional (2D) plane strain model was analyzed by applying a single hazard: rainfall, toe erosion induced by the flood, and earthquake and then dual hazards: rainfall-erosion and rainfall-earthquake. The results showed that slope movements due to dual hazard were higher compared to a single hazard. The factor of safety against slope stability from the dual hazard analysis was found to be lower than that of single hazard analysis. The percentage decrease in the factor of safety for the dual hazard rainfall-erosion compared to single hazard rainfall is 16.1% for SR1, 19.7% for SR2, and 17.3% for SR3. Further, from the parametric study, it can be observed that the factor of safety for the slope ratio 2:1 is 27.67% larger than the slope ratio 1.5:1 and for the slope ratio 3:1 is 78.05% larger than the slope ratio 1.5:1.
Multi Hazard Analysis of Earth Slopes Using Coupled Geotechnical-Hydrological Finite Element Model
The purpose of this study is to analyze the stability and deformation behaviors of earth slopes subjected to common natural hazards such as rainfall, toe erosion induced by the flood, earthquake, and simultaneous occurrence of rainfall-erosion and rainfall-earthquake. A coupled geotechnical-hydrological finite element software, PLAXIS 2D which is capable of coupling deformation and flow behavior of soil with varying degree of saturation was used. First, a two-dimensional (2D) plane strain model was analyzed by applying a single hazard: rainfall, toe erosion induced by the flood, and earthquake and then dual hazards: rainfall-erosion and rainfall-earthquake. The results showed that slope movements due to dual hazard were higher compared to a single hazard. The factor of safety against slope stability from the dual hazard analysis was found to be lower than that of single hazard analysis. The percentage decrease in the factor of safety for the dual hazard rainfall-erosion compared to single hazard rainfall is 16.1% for SR1, 19.7% for SR2, and 17.3% for SR3. Further, from the parametric study, it can be observed that the factor of safety for the slope ratio 2:1 is 27.67% larger than the slope ratio 1.5:1 and for the slope ratio 3:1 is 78.05% larger than the slope ratio 1.5:1.
Multi Hazard Analysis of Earth Slopes Using Coupled Geotechnical-Hydrological Finite Element Model
Vickneswaran, Tharshikka (Autor:in) / Ravichandran, Nadarajah (Autor:in)
Geo-Congress 2020 ; 2020 ; Minneapolis, Minnesota
Geo-Congress 2020 ; 60-69
21.02.2020
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Multi Hazard Analysis of Earth Slopes Using Coupled Geotechnical-Hydrological Finite Element Model
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