Effects of model parameters, topography, and scale on the mass movement processes of debris avalanches using the discrete element method

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Effects of model parameters, topography, and scale on the mass movement processes of debris avalanches using the discrete element method
	Zhou, Jia-wen 1; Xu, Fu-gang 2; Guo, Chao-xu3
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2016-05-01
卷号	9 期号:5 页码:DOI:10.1007/s12517-016-2441-7
关键词	Debris avalanche Numerical simulation Discrete element method Mass movement Supplying process Impact factors
ISSN号	1866-7511
通讯作者	Zhou, Jia-wen
英文摘要	The 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.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Geosciences, Multidisciplinary
研究领域[WOS]	Geology
关键词[WOS]	TSAOLING LANDSLIDE ; ROCK ; SIMULATION ; MOBILITY ; TAIWAN ; MOTION ; FLOW
收录类别	SCI
语种	英语
WOS记录号	WOS:000375767000089
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17386]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位	1.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
推荐引用方式 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.