Spatial variability effect of internal friction angle on the post-failure behavior of landslides using a random and non-Newtonian fluid based SPH method

This study proposed a random Smoothed Particle Hydrodynamics method for analyzing the post-failure behavior of landslides, which is based on the Karhunen–Loève (K-L) expansion, the non-Newtonian fluid model, and the OpenMP parallel framework. Then, the applicability of this method was validated by c...

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Main Authors: Weijie Zhang, Jian Ji, Yufeng Gao, Xiaoyu Li, Chunshun Zhang
Format: Article
Language:English
Published: Elsevier 2020-07-01
Series:Geoscience Frontiers
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S1674987120300451
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spelling doaj-e8f82fcefacb425ca77962b51d17c98a2020-11-25T03:40:34ZengElsevierGeoscience Frontiers1674-98712020-07-0111411071121Spatial variability effect of internal friction angle on the post-failure behavior of landslides using a random and non-Newtonian fluid based SPH methodWeijie Zhang0Jian Ji1Yufeng Gao2Xiaoyu Li3Chunshun Zhang4Key Lab of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, 210098, ChinaKey Lab of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, 210098, China; Corresponding author.Key Lab of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, 210098, ChinaKey Lab of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing, 210098, ChinaDepartment of Civil Engineering, Monash University, Clayton, 3168, AustraliaThis study proposed a random Smoothed Particle Hydrodynamics method for analyzing the post-failure behavior of landslides, which is based on the Karhunen–Loève (K-L) expansion, the non-Newtonian fluid model, and the OpenMP parallel framework. Then, the applicability of this method was validated by comparing the generated random field with theoretical result and by simulating the post-failure process of an actual landslide. Thereafter, an illustrative landslide example was created and simulated to obtain the spatial variability effect of internal friction angle on the post-failure behavior of landslides under different coefficients of variation (COVs) and correlation lengths (CLs). As a conclusion, the reinforcement with materials of a larger friction angle can reduce the runout distance and impact the force of a landslide. As the increase of COV, the distribution range of influence zones also increases, which indicates that the deviation of influence zones becomes large. In addition, the correlation length in Monte Carlo simulations should not be too small, otherwise the variation range of influence zones will be underestimated.http://www.sciencedirect.com/science/article/pii/S1674987120300451LandslidesSpatial variabilityRandom fieldSmoothed particle hydrodynamicsMonte Carlo simulationPost-failure behavior
collection DOAJ
language English
format Article
sources DOAJ
author Weijie Zhang
Jian Ji
Yufeng Gao
Xiaoyu Li
Chunshun Zhang
spellingShingle Weijie Zhang
Jian Ji
Yufeng Gao
Xiaoyu Li
Chunshun Zhang
Spatial variability effect of internal friction angle on the post-failure behavior of landslides using a random and non-Newtonian fluid based SPH method
Geoscience Frontiers
Landslides
Spatial variability
Random field
Smoothed particle hydrodynamics
Monte Carlo simulation
Post-failure behavior
author_facet Weijie Zhang
Jian Ji
Yufeng Gao
Xiaoyu Li
Chunshun Zhang
author_sort Weijie Zhang
title Spatial variability effect of internal friction angle on the post-failure behavior of landslides using a random and non-Newtonian fluid based SPH method
title_short Spatial variability effect of internal friction angle on the post-failure behavior of landslides using a random and non-Newtonian fluid based SPH method
title_full Spatial variability effect of internal friction angle on the post-failure behavior of landslides using a random and non-Newtonian fluid based SPH method
title_fullStr Spatial variability effect of internal friction angle on the post-failure behavior of landslides using a random and non-Newtonian fluid based SPH method
title_full_unstemmed Spatial variability effect of internal friction angle on the post-failure behavior of landslides using a random and non-Newtonian fluid based SPH method
title_sort spatial variability effect of internal friction angle on the post-failure behavior of landslides using a random and non-newtonian fluid based sph method
publisher Elsevier
series Geoscience Frontiers
issn 1674-9871
publishDate 2020-07-01
description This study proposed a random Smoothed Particle Hydrodynamics method for analyzing the post-failure behavior of landslides, which is based on the Karhunen–Loève (K-L) expansion, the non-Newtonian fluid model, and the OpenMP parallel framework. Then, the applicability of this method was validated by comparing the generated random field with theoretical result and by simulating the post-failure process of an actual landslide. Thereafter, an illustrative landslide example was created and simulated to obtain the spatial variability effect of internal friction angle on the post-failure behavior of landslides under different coefficients of variation (COVs) and correlation lengths (CLs). As a conclusion, the reinforcement with materials of a larger friction angle can reduce the runout distance and impact the force of a landslide. As the increase of COV, the distribution range of influence zones also increases, which indicates that the deviation of influence zones becomes large. In addition, the correlation length in Monte Carlo simulations should not be too small, otherwise the variation range of influence zones will be underestimated.
topic Landslides
Spatial variability
Random field
Smoothed particle hydrodynamics
Monte Carlo simulation
Post-failure behavior
url http://www.sciencedirect.com/science/article/pii/S1674987120300451
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