Effect of Characteristics of Ground Motion on Seismically Induced Sliding Surface of Slopes
The seismic performance of slopes is typically evaluated with a pseudo-static method using equivalent horizontal load or with Newmark sliding block analysis. In both procedures, the definition of the potential sliding surface is a required input. The sliding surface has been reported to be marginall...
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MDPI AG
2021-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/12/5319 |
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| author | Muhammad Irslan Khalid Yonggook Lee Yonghee Lee Hak-Sung Kim Duhee Park |
| author_facet | Muhammad Irslan Khalid Yonggook Lee Yonghee Lee Hak-Sung Kim Duhee Park |
| author_sort | Muhammad Irslan Khalid |
| collection | DOAJ |
| description | The seismic performance of slopes is typically evaluated with a pseudo-static method using equivalent horizontal load or with Newmark sliding block analysis. In both procedures, the definition of the potential sliding surface is a required input. The sliding surface has been reported to be marginally influenced by the input ground motion and, therefore, is most often assumed from a pseudo-static procedure. In this study, extensive series of two-dimensional dynamic nonlinear finite element analyses are performed to evaluate the sensitivity of the sliding surface on the slope geometry, soil strength parameters, and input ground motion characteristics. It is demonstrated that the sliding surface may vary with the intensity and frequency characteristics of the input motion. Slopes with inclination angle equal or less than 35° are shown to be marginally influenced by motion intensity if the mean period (<i>T<sub>m</sub></i>) < 0.3 s. However, slopes inclined at 45° are revealed to be more sensitive to the motion intensity and <i>T<sub>m</sub></i>. For motions with <i>T<sub>m</sub></i> > 0.3 s, the sliding surface is demonstrated to widen with an increase in the intensity of the input ground motions. The degree of widening increases proportionally with an increase in <i>T<sub>m</sub></i>. It is, therefore, recommended to derive sliding surfaces from a dynamic analysis for steep slopes. |
| first_indexed | 2024-03-10T10:37:23Z |
| format | Article |
| id | doaj.art-b2c37b471ea64f0d935a486498379299 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T10:37:23Z |
| publishDate | 2021-06-01 |
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| spelling | doaj.art-b2c37b471ea64f0d935a4864983792992023-11-21T23:12:22ZengMDPI AGApplied Sciences2076-34172021-06-011112531910.3390/app11125319Effect of Characteristics of Ground Motion on Seismically Induced Sliding Surface of SlopesMuhammad Irslan Khalid0Yonggook Lee1Yonghee Lee2Hak-Sung Kim3Duhee Park4Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, KoreaDepartment of Civil and Environmental Engineering, Hanyang University, Seoul 04763, KoreaCentral Research Institute, Korean Hydro and Nuclear Power Corporation, Daejeon 34101, KoreaCentral Research Institute, Korean Hydro and Nuclear Power Corporation, Daejeon 34101, KoreaDepartment of Civil and Environmental Engineering, Hanyang University, Seoul 04763, KoreaThe seismic performance of slopes is typically evaluated with a pseudo-static method using equivalent horizontal load or with Newmark sliding block analysis. In both procedures, the definition of the potential sliding surface is a required input. The sliding surface has been reported to be marginally influenced by the input ground motion and, therefore, is most often assumed from a pseudo-static procedure. In this study, extensive series of two-dimensional dynamic nonlinear finite element analyses are performed to evaluate the sensitivity of the sliding surface on the slope geometry, soil strength parameters, and input ground motion characteristics. It is demonstrated that the sliding surface may vary with the intensity and frequency characteristics of the input motion. Slopes with inclination angle equal or less than 35° are shown to be marginally influenced by motion intensity if the mean period (<i>T<sub>m</sub></i>) < 0.3 s. However, slopes inclined at 45° are revealed to be more sensitive to the motion intensity and <i>T<sub>m</sub></i>. For motions with <i>T<sub>m</sub></i> > 0.3 s, the sliding surface is demonstrated to widen with an increase in the intensity of the input ground motions. The degree of widening increases proportionally with an increase in <i>T<sub>m</sub></i>. It is, therefore, recommended to derive sliding surfaces from a dynamic analysis for steep slopes.https://www.mdpi.com/2076-3417/11/12/5319seismic slope stabilitysliding surfacefinite elementdynamic analysisnonlinear soil model |
| spellingShingle | Muhammad Irslan Khalid Yonggook Lee Yonghee Lee Hak-Sung Kim Duhee Park Effect of Characteristics of Ground Motion on Seismically Induced Sliding Surface of Slopes Applied Sciences seismic slope stability sliding surface finite element dynamic analysis nonlinear soil model |
| title | Effect of Characteristics of Ground Motion on Seismically Induced Sliding Surface of Slopes |
| title_full | Effect of Characteristics of Ground Motion on Seismically Induced Sliding Surface of Slopes |
| title_fullStr | Effect of Characteristics of Ground Motion on Seismically Induced Sliding Surface of Slopes |
| title_full_unstemmed | Effect of Characteristics of Ground Motion on Seismically Induced Sliding Surface of Slopes |
| title_short | Effect of Characteristics of Ground Motion on Seismically Induced Sliding Surface of Slopes |
| title_sort | effect of characteristics of ground motion on seismically induced sliding surface of slopes |
| topic | seismic slope stability sliding surface finite element dynamic analysis nonlinear soil model |
| url | https://www.mdpi.com/2076-3417/11/12/5319 |
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