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Effects of model parameters, topography, and scale on the mass movement processes of debris avalanches using the discrete element method
Zhou, Jia-wen1; Xu, Fu-gang2; Guo, Chao-xu3
Corresponding AuthorZhou, Jia-wen
2016
Source PublicationARABIAN JOURNAL OF GEOSCIENCES
ISSN1866-7511
EISSN1866-7538
Volume9Issue:5Pages:DOI:10.1007/s12517-016-2441-7
SubtypeArticle
AbstractThe mass movement process of a debris avalanche is a complex dynamic system and is influenced by topographic conditions, material composition, sliding-bed surface conditions and other factors. A discrete element method is used to simulate the mass movement process of debris avalanches and is validated by laboratory flume tests. Sensitivity analyses for the model parameters show that a low bond strength indicates that a small impact force can lead to slope failure. The friction coefficient has a little effect on the mass movement process. However, high particle stiffness and bond strength causes the sliding material to behave like a rigid block of rock; therefore low bond strength and particle stiffness are selected to simulate the laboratory flume tests. The velocity of the sliding material increases with the increasing slope of the flume. If the sliding material hits a barrier, the travel direction will change and energy dissipation will occur, resulting in the sudden decrease in velocity. With an increase in landslide volume, the model parameters particle stiffness and parallel bond strength should be increased to ensure the reasonableness of the simulated results. When the landslide volume is not large enough, the selection of those model parameters has no significant effect on the movement process. The proper selection of model parameters is very important for the reasonableness of the simulated results.
KeywordDebris Avalanche Numerical Simulation Discrete Element Method Mass Movement Supplying Process Impact Factors
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s12517-016-2441-7
WOS Subject ExtendedGeology
Indexed BySCI
WOS KeywordTSAOLING LANDSLIDE ; ROCK ; SIMULATION ; MOBILITY ; TAIWAN ; MOTION ; FLOW
Language英语
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000375767000089
Funding OrganizationKey Deployment Project of Chinese Academy of Sciences(KZZD-EW-05-01) ; National Natural Science Foundation of China(41472272 ; Science Foundation for Excellent Youth Scholars of Sichuan University(2013SCU04A07) ; 41102194)
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Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/17386
Collection山地灾害与地表过程重点实验室
Affiliation1.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China
2.Sichuan Univ, Coll Water Resource & Hydropower, Chengdu 610065, Peoples R China
3.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610044, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Jia-wen,Xu, Fu-gang,Guo, Chao-xu. Effects of model parameters, topography, and scale on the mass movement processes of debris avalanches using the discrete element method[J]. ARABIAN JOURNAL OF GEOSCIENCES,2016,9(5):DOI:10.1007/s12517-016-2441-7.
APA Zhou, Jia-wen,Xu, Fu-gang,&Guo, Chao-xu.(2016).Effects of model parameters, topography, and scale on the mass movement processes of debris avalanches using the discrete element method.ARABIAN JOURNAL OF GEOSCIENCES,9(5),DOI:10.1007/s12517-016-2441-7.
MLA Zhou, Jia-wen,et al."Effects of model parameters, topography, and scale on the mass movement processes of debris avalanches using the discrete element method".ARABIAN JOURNAL OF GEOSCIENCES 9.5(2016):DOI:10.1007/s12517-016-2441-7.
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