Numerical analysis of effect of baffle configuration on impact force exerted from rock avalanches

doi:10.1007/s10346-018-0979-z

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

	Numerical analysis of effect of baffle configuration on impact force exerted from rock avalanches
	YuZhang Bi 1; YanJun Du 1; SiMing He2,3,4 ; XinPo Sun 5; DongPo Wang6 ; XinPo Li2,4 ; Heng Liang 2,4; Yong Wu2,4 ; He, SiMing; Wang, DongPo
刊名	LANDSLIDES
	2018
卷号	15 期号:5 页码:1029-1043
关键词	Rock avalanches Discrete element method Baffles Interaction mechanisms Energy dissipation
ISSN号	1612-510X
DOI	10.1007/s10346-018-0979-z
通讯作者	SiMing He
英文摘要	In mountainous areas, channelized rock avalanches swarm downslope leading to large impact forces on building structures in residential areas. Arrays of rock avalanche baffles are usually installed in front of rigid barriers to attenuate the flow energy of rock avalanches. However, previous studies have not sufficiently addressed the mechanisms of interaction between the rock avalanches and baffles. In addition, empirical design approaches such as debris flow (Tang et al., Quat Int 250:63-73, 2012), rockfall (Spang and Rautenstrauch, 1237-1243, 1988), snow avalanches (Favier et al., 14:3-15, 2012), and rock avalanches (Manzella and Labiouse, Landslides 10:23-36, 2013), which are applied in natural geo-disasters mitigation cannot met construction requirements. This study presents details of numerical modeling using the discrete element method (DEM) to investigate the effect of the configuration of baffles (number and spacing of baffle columns and rows) on the impact force that rock avalanches exert on baffles. The numerical modeling is firstly conducted to provide insights into the flow interaction between rock avalanches and an array of baffles. Then, a modeling analysis is made to investigate the change pattern of the impact force with respect to baffle configurations. The results demonstrate that three crucial influencing factors (baffle row numbers, baffle column spacing, and baffle row spacing) have close relationship with energy dissipation of baffles. Interestingly, it is found that capacity of energy dissipation of baffles increases with increasing baffle row numbers and baffle row spacing, while it decreases with increasing baffle column spacing. The results obtained from this study are useful for facilitating design of baffles against rock avalanches.
语种	英语
WOS记录号	WOS:000431308800015
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/21481]
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
通讯作者	He, SiMing
作者单位	1.Southeast Univ, Sch Transportat, Inst Geotech Engn, 2 Sipalou Rd, Nanjing 210096, Jiangsu, Peoples R China; 2.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Sichuan, Peoples R China; 3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; 4.Chinese Acad Sci, IMHE, 9,Block 4,Renminnanlu Rd, Chengdu 610041, Sichuan, Peoples R China; 5.Sichuan Univ Sci & Engn, Sch Civil Engn, Zigong 643000, Sichuan, Peoples R China; 6.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	YuZhang Bi,YanJun Du,SiMing He,et al. Numerical analysis of effect of baffle configuration on impact force exerted from rock avalanches[J]. LANDSLIDES,2018,15(5):1029-1043.
APA	YuZhang Bi.,YanJun Du.,SiMing He.,XinPo Sun.,DongPo Wang.,...&Wu, Yong.(2018).Numerical analysis of effect of baffle configuration on impact force exerted from rock avalanches.LANDSLIDES,15(5),1029-1043.
MLA	YuZhang Bi,et al."Numerical analysis of effect of baffle configuration on impact force exerted from rock avalanches".LANDSLIDES 15.5(2018):1029-1043.