Quantifying the impact of dry debris flow against a rigid barrier by DEM analyses

doi:10.1016/j.enggeo.2018.05.011

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 > 山地表生过程与生态调控重点实验室

	Quantifying the impact of dry debris flow against a rigid barrier by DEM analyses
	Weigang Shen 1; Tao Zhao 1; Jidong Zhao 2; Feng Dai 1; Gordon G.D. Zhou3
刊名	ENGINEERING GEOLOGY
	2018
卷号	241 页码:86-96
关键词	Debris flow Rigid barrier Discrete element method Barrier slope Impact force
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2018.05.011
通讯作者	Tao Zhao
产权排序	3
英文摘要	This study investigates the interaction between dry debris flows and a rigid barrier through discrete element modeling (DEM) of flume tests. The debris materials were modeled as an assembly of loosely packed spherical particles and the rigid barrier was represented by a layer of fixed particles. The numerical model was validated by comparing the numerical results with the experimental data reported in the literature, in terms of the debris flow morphology and evolution of impact forces acting on the rigid barrier. This model was further employed to examine the influence of barrier slope on the debris-barrier interactions. Based on the numerical results, three interaction stages were identified, namely the frontal impact, run-up and pile-up. The maximum impact force measured in this study exhibits a power law dependence on the barrier slope. In addition, during the impact process, the majority of initial total energy was dissipated by particle-particle and particle-flume interactions, while only a negligibly small amount of energy was dissipated by particle-barrier interaction. The numerical results also indicate that long spreading debris flows are very effective in facilitating energy dissipation, diminishing the impact force acting on the rigid barrier. These considerations can finally contribute to the design of effective debris flow barriers.
电子版国际标准刊号	1872-6917
语种	英语
WOS记录号	WOS:000436219400009
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/23418]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室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.State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China; 2.Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China; 3.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Ministry of Water Conservancy, Chengdu 610041, China
推荐引用方式 GB/T 7714	Weigang Shen,Tao Zhao,Jidong Zhao,et al. Quantifying the impact of dry debris flow against a rigid barrier by DEM analyses[J]. ENGINEERING GEOLOGY,2018,241:86-96.
APA	Weigang Shen,Tao Zhao,Jidong Zhao,Feng Dai,&Gordon G.D. Zhou.(2018).Quantifying the impact of dry debris flow against a rigid barrier by DEM analyses.ENGINEERING GEOLOGY,241,86-96.
MLA	Weigang Shen,et al."Quantifying the impact of dry debris flow against a rigid barrier by DEM analyses".ENGINEERING GEOLOGY 241(2018):86-96.