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Three-dimensional material point method modeling of runout behavior of the Hongshiyan landslide
Xu Xiaorong1,2; Jin Feng1; Sun Qicheng1; Soga Kenichi2; Zhou Gordon G. D.3
Contribution Rank3
AbstractThis study presents a field-scale simulation of the Hongshiyan landslide in China. It uses an advanced numerical approach (material point method (MPM)) and a constitutive model (the Drucker-Prager model + mu(I) rheological relation) for the three-dimensional (3D) simulation. The performance of the developed MPM model is validated with laboratory-scale experimental data on granular collapse before being applied to field-scale analyses. ArcGIS data are used to create a 3D MPM model of the soil body with complicated geometry. Although the developed model can describe the multiple phases of granular flow, it focuses on the runout behavior of the landslide in this work. The landslide is assumed to have occurred suddenly due to an earthquake, and global sudden failure rather than progressive failure is modeled. The MPM simulation results match reasonably well with the measured post-earthquake topography (e.g., deposit height of about 120 m and stretch length of about 900 m in the river) and landslide duration of about 1 min. The velocity of the sliding mass increases rapidly during flow, especially in the first 20 s. The velocity profiles along the depth direction at different locations of the sliding body exhibit an exponential distribution similar to that of a Bagnold-type profile, indicating that the sliding body is fully mobilized. The rate-dependent dissipation parameter beta used in the model significantly influences the runout behavior (e.g., flow speed, velocity distribution, and deposit shape).
Keywordlandslide material point method ArcGIS rheological relation
Indexed BySCI
WOS IDWOS:000484192300009
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Document Type期刊论文
Corresponding AuthorSun Qicheng; Soga Kenichi
Affiliation1.State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China;
2.Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720-1710, USA;
3.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China
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GB/T 7714
Xu Xiaorong,Jin Feng,Sun Qicheng,et al. Three-dimensional material point method modeling of runout behavior of the Hongshiyan landslide[J]. CANADIAN GEOTECHNICAL JOURNAL,2019,56(9):1318-1337.
APA Xu Xiaorong,Jin Feng,Sun Qicheng,Soga Kenichi,&Zhou Gordon G. D..(2019).Three-dimensional material point method modeling of runout behavior of the Hongshiyan landslide.CANADIAN GEOTECHNICAL JOURNAL,56(9),1318-1337.
MLA Xu Xiaorong,et al."Three-dimensional material point method modeling of runout behavior of the Hongshiyan landslide".CANADIAN GEOTECHNICAL JOURNAL 56.9(2019):1318-1337.
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