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Probabilistic decoupled approach to estimate seismic rotational displacements of flexible slopes considering depth-dependent soil variability
https://orcid.org/http://orcid.org/0000-0002-4392-6255
Earth slopes usually exhibit a rotational failure mode when subjected to seismic shaking. In current seismic rotational slope displacement analysis, the slopes are usually modelled with homogeneous soil properties, and the dynamic response of slopes is commonly ignored. This study thus proposes a probabilistic decoupled approach to evaluate the seismic rotational displacement of flexible slopes. This approach has the following features: (1) the depth-dependent variability of soil parameters is characterized by non-stationary random fields; (2) the dynamic response of the slope is properly captured by a decoupled procedure; (3) the slope displacement hazard curve (DHC) and failure probability in an exposure period (Pf,T) serve as outputs, facilitating the long-term reliability-based slope design. Comparative results indicate that ignoring the dynamic slope response would lead to inaccurate estimates of the DHC and Pf,T. Besides, neglecting the depth-dependent soil variability yields unconservative results, which cannot be captured by the traditional slope displacement analysis. Parametric studies illustrate that the scale of fluctuation and the coefficients of variation (parameters needed in the probabilistic modeling) noticeably affect the resultant slope displacement hazard. The proposed approach could serve as a useful tool to evaluate the seismic displacement hazard of earth slopes exhibiting rotational failure modes.
Probabilistic decoupled approach to estimate seismic rotational displacements of flexible slopes considering depth-dependent soil variability
https://orcid.org/http://orcid.org/0000-0002-4392-6255
Earth slopes usually exhibit a rotational failure mode when subjected to seismic shaking. In current seismic rotational slope displacement analysis, the slopes are usually modelled with homogeneous soil properties, and the dynamic response of slopes is commonly ignored. This study thus proposes a probabilistic decoupled approach to evaluate the seismic rotational displacement of flexible slopes. This approach has the following features: (1) the depth-dependent variability of soil parameters is characterized by non-stationary random fields; (2) the dynamic response of the slope is properly captured by a decoupled procedure; (3) the slope displacement hazard curve (DHC) and failure probability in an exposure period (Pf,T) serve as outputs, facilitating the long-term reliability-based slope design. Comparative results indicate that ignoring the dynamic slope response would lead to inaccurate estimates of the DHC and Pf,T. Besides, neglecting the depth-dependent soil variability yields unconservative results, which cannot be captured by the traditional slope displacement analysis. Parametric studies illustrate that the scale of fluctuation and the coefficients of variation (parameters needed in the probabilistic modeling) noticeably affect the resultant slope displacement hazard. The proposed approach could serve as a useful tool to evaluate the seismic displacement hazard of earth slopes exhibiting rotational failure modes.
Probabilistic decoupled approach to estimate seismic rotational displacements of flexible slopes considering depth-dependent soil variability
https://orcid.org/http://orcid.org/0000-0002-4392-6255
Earth slopes usually exhibit a rotational failure mode when subjected to seismic shaking. In current seismic rotational slope displacement analysis, the slopes are usually modelled with homogeneous soil properties, and the dynamic response of slopes is commonly ignored. This study thus proposes a probabilistic decoupled approach to evaluate the seismic rotational displacement of flexible slopes. This approach has the following features: (1) the depth-dependent variability of soil parameters is characterized by non-stationary random fields; (2) the dynamic response of the slope is properly captured by a decoupled procedure; (3) the slope displacement hazard curve (DHC) and failure probability in an exposure period (Pf,T) serve as outputs, facilitating the long-term reliability-based slope design. Comparative results indicate that ignoring the dynamic slope response would lead to inaccurate estimates of the DHC and Pf,T. Besides, neglecting the depth-dependent soil variability yields unconservative results, which cannot be captured by the traditional slope displacement analysis. Parametric studies illustrate that the scale of fluctuation and the coefficients of variation (parameters needed in the probabilistic modeling) noticeably affect the resultant slope displacement hazard. The proposed approach could serve as a useful tool to evaluate the seismic displacement hazard of earth slopes exhibiting rotational failure modes.
Probabilistic decoupled approach to estimate seismic rotational displacements of flexible slopes considering depth-dependent soil variability
Acta Geotech.
Wang, Mao-Xin (author) / Li, Dian-Qing (author) / Liu, Yong (author) / Du, Wen-Qi (author)
Acta Geotechnica ; 17 ; 1551-1567
2022-04-01
17 pages
Article (Journal)
Electronic Resource
English
Decoupled approach , Depth-dependent soil variability , Displacement hazard curve , Non-stationary random filed , Probabilistic rotational displacement analysis , Seismic slope performance Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
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