https://scholars.lib.ntu.edu.tw/handle/123456789/576046
標題: | Postfailure Characterization of Shallow Landslides Using the Material Point Method | 作者: | Nguyen T.S Yang K.-H Ho C.-C Huang F.-C. KUO-HSIN YANG |
關鍵字: | computer simulation; deformation; ground movement; hazard assessment; landslide; numerical model; risk assessment; slope dynamics; slope failure; slope stability | 公開日期: | 2021 | 卷: | 2021 | 來源出版物: | Geofluids | 摘要: | 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. ? 2021 Thanh Son Nguyen et al. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85101502172&doi=10.1155%2f2021%2f8860517&partnerID=40&md5=02eb15c856419f912d7f7197fe8067e8 https://scholars.lib.ntu.edu.tw/handle/123456789/576046 |
ISSN: | 14688115 | DOI: | 10.1155/2021/8860517 |
顯示於: | 土木工程學系 |
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