Large deformation analysis of slope failure using material point method with cross-correlated random fields

Large deformation analysis of slope failure is important for hazard and risk assessment of infrastructure. Recent studies have revealed that spatial variability of soil properties can significantly affect the probability of slope failure. However, due to limitations of traditional numerical tools, t...

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Bibliographic Details
Published in:Journal of Zhejiang University. A. Science 2021-11, Vol.22 (11), p.856-869
Main Authors: Qu, Chuan-xiang, Wang, Gang, Feng, Ke-wei, Xia, Zhen-dong
Format: Article
Language:English
Subjects:
Civil Engineering
Classical and Continuum Physics
Cohesion
Cross correlation
Deformation
Deformation analysis
Engineering
Failure analysis
Fields (mathematics)
Finite element method
Friction
Industrial Chemistry/Chemical Engineering
Mechanical Engineering
Monte Carlo simulation
Residual strength
Risk assessment
Shape factor
Soil properties
Soils
Stochastic processes
Stochasticity
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Summary:Large deformation analysis of slope failure is important for hazard and risk assessment of infrastructure. Recent studies have revealed that spatial variability of soil properties can significantly affect the probability of slope failure. However, due to limitations of traditional numerical tools, the influence of spatial variability of soil properties on the post-failure behavior of slopes has not been fully understood. Therefore, in this study, we aimed to investigate the effects of the cross-correlation between cohesion and the friction angle on the probability of slope failure and post-failure behavior (e.g. run-out distance, influence distance, and influence zone) using a random material point method (RMPM). The study showed that mesh size, strength reduction shape factor parameter, and residual strength all play critical roles in the calculated post-failure behavior of a slope. Based on stochastic Monte Carlo simulation, the effects of cross-correlation between cohesion and the friction angle on the probability of slope failure, and its run-out distance, influence distance, influence zone, and sliding volume were studied. The study also showed that material point method (MPM) has great advantages compared with the finite element method (FEM) in handling large deformations.
ISSN:1673-565X
1862-1775
DOI:10.1631/jzus.A2100196