Postfailure Characterization of Shallow Landslides Using the Material Point Method
Although the mechanisms of slope failure caused by rising groundwater have been widely investigated, the kinematic behavior of landslides in the postfailure stage, which contains essential information for hazard mitigation and risk assessment, has not yet been fully studied. Thus, in this study, a s...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/8860517 |
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| author | Thanh Son Nguyen Kuo-Hsin Yang Chia-Chun Ho Feng-Chi Huang |
| author_facet | Thanh Son Nguyen Kuo-Hsin Yang Chia-Chun Ho Feng-Chi Huang |
| author_sort | Thanh Son Nguyen |
| collection | DOAJ |
| description | Although the mechanisms of slope failure caused by rising groundwater have been widely investigated, the kinematic behavior of landslides in the postfailure stage, which contains essential information for hazard mitigation and risk assessment, has not yet been fully studied. Thus, in this study, a series of numerical simulations using the material point method (MPM) were conducted to analyze the kinematic behavior and soil movement of shallow landslides (infinite slope problems). First, the proposed MPM formulation was validated in a full-scale landslide flume test. The simulated results of final slope profile, runout distance, deposit height, shear band development, slope displacement, and velocity accorded with the experimental results, suggesting that the MPM can quantitatively simulate large deformations. A parametric study of shallow slopes with various hydrological conditions and soil hydraulic and soil mechanical parameters was then performed to assess the influence of the aforementioned factors on landslide kinematics. The simulation results indicated that mechanical behavior at the slope toe is complex; the multiple plastic shear bands generated at the slope toe were due to a combination of shearing and compression. The deposition profile of the slopes was significantly influenced by all input parameters. Among the aforementioned parameters, soil cohesion, location of the groundwater table, and saturated soil permeability most greatly affected runout distance in the sensitivity assessment. Soil friction angle had a minor influence on the kinematic behavior of the slope. |
| format | Article |
| id | doaj-art-afc0dc0fafed4f4d83d88120326d5199 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-afc0dc0fafed4f4d83d88120326d51992025-08-20T03:39:18ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/88605178860517Postfailure Characterization of Shallow Landslides Using the Material Point MethodThanh Son Nguyen0Kuo-Hsin Yang1Chia-Chun Ho2Feng-Chi Huang3Faculty of Bridges and Roads, National University of Civil Engineering (NUCE), 55 Giai Phong Rd., Hai Ba Trung Dist., Hanoi 11616, VietnamDepartment of Civil Engineering, National Taiwan University (NTU), 1 Sec. 4, Roosevelt Rd., Taipei 106, TaiwanDepartment of Civil and Construction Engineering, National Taiwan University of Science and Technology (Taiwan Tech), 43 Sec. 4, Keelung Rd., Taipei 106, TaiwanTaiwan Construction Research Institute, 11F 190 Sec. 2, Chunghsin Rd., New Taipei City 231, TaiwanAlthough the mechanisms of slope failure caused by rising groundwater have been widely investigated, the kinematic behavior of landslides in the postfailure stage, which contains essential information for hazard mitigation and risk assessment, has not yet been fully studied. Thus, in this study, a series of numerical simulations using the material point method (MPM) were conducted to analyze the kinematic behavior and soil movement of shallow landslides (infinite slope problems). First, the proposed MPM formulation was validated in a full-scale landslide flume test. The simulated results of final slope profile, runout distance, deposit height, shear band development, slope displacement, and velocity accorded with the experimental results, suggesting that the MPM can quantitatively simulate large deformations. A parametric study of shallow slopes with various hydrological conditions and soil hydraulic and soil mechanical parameters was then performed to assess the influence of the aforementioned factors on landslide kinematics. The simulation results indicated that mechanical behavior at the slope toe is complex; the multiple plastic shear bands generated at the slope toe were due to a combination of shearing and compression. The deposition profile of the slopes was significantly influenced by all input parameters. Among the aforementioned parameters, soil cohesion, location of the groundwater table, and saturated soil permeability most greatly affected runout distance in the sensitivity assessment. Soil friction angle had a minor influence on the kinematic behavior of the slope.http://dx.doi.org/10.1155/2021/8860517 |
| spellingShingle | Thanh Son Nguyen Kuo-Hsin Yang Chia-Chun Ho Feng-Chi Huang Postfailure Characterization of Shallow Landslides Using the Material Point Method Geofluids |
| title | Postfailure Characterization of Shallow Landslides Using the Material Point Method |
| title_full | Postfailure Characterization of Shallow Landslides Using the Material Point Method |
| title_fullStr | Postfailure Characterization of Shallow Landslides Using the Material Point Method |
| title_full_unstemmed | Postfailure Characterization of Shallow Landslides Using the Material Point Method |
| title_short | Postfailure Characterization of Shallow Landslides Using the Material Point Method |
| title_sort | postfailure characterization of shallow landslides using the material point method |
| url | http://dx.doi.org/10.1155/2021/8860517 |
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