Quantitative analysis of debris-flow flexible barrier capacity from momentum and energy perspectives

doi:10.1016/j.enggeo.2019.02.010

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

	Quantitative analysis of debris-flow flexible barrier capacity from momentum and energy perspectives
	Song, D.1,2; Zhou, Gordon G. D.1,2 ; Xu, Min 3; Choi, C. E.4,5; Li, S.1 ; Zheng, Y.6
刊名	ENGINEERING GEOLOGY
	2019-03-09
卷号	251 页码:81-92
关键词	Debris flow Flexible barrier Kinetic energy Momentum flux Debris-structure interaction
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2019.02.010
通讯作者	Zhou, Gordon G. D.(gordon@imde.ac.cn)
产权排序	1
文献子类	Article
英文摘要	In-depth understanding of debris-structure interaction is hindered by a lack of physical data of debris flow impacting structures. This study reports a set of centrifuge experiments investigating the impact load exerted by debris flow on rigid and flexible barriers. A combination of high-speed imagery and load-displacement sensors enabled a comprehensive grasp of the impact details, including flow depth, velocity, impact pressure, bending moment, and cable force-elongation of flexible barrier. Test results reveal that the debris-structure interaction plays a major role in the energy dissipation and impact load reconstruction. The built-up of static load behind the barrier occurs simultaneously with the grow-up of impact force. As a result, the momentum flux of incoming flow is not merely a surrogate of the impact force. A quantitative analysis from the energy perspective has been conducted. Under the experimental conditions of this study, debris flow impact results in over 90% of debris energy dissipated through the internal and boundary shearing, leaving < 10% absorbed by the flexible barrier. Findings from the energy and momentum perspectives could facilitate the optimization of flexible barriers in mitigation of debris flow hazards.
资助项目	National Natural Science Foundation of China, China[51809261] ; National Natural Science Foundation of China, China[5170091039] ; National Natural Science Foundation of China, China[11672318] ; National Natural Science Foundation of China, China[11602284] ; CAS Light of West China Program, China[Y6R2220220] ; CAS Light of West China Program, China[T22-603/15-N] ; Research Grants Council of the Government of Hong Kong SAR, China
WOS关键词	LANDSLIDE ; DESIGN
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000464480600008
资助机构	National Natural Science Foundation of China, China ; CAS Light of West China Program, China ; Research Grants Council of the Government of Hong Kong SAR, China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/25904]
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	Zhou, Gordon G. D.
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Beijing, Peoples R China; 2.Univ Chinese Acad Sci, Beijing, Peoples R China; 3.Geobrugg Chengdu Co Ltd, Chengdu, Sichuan, Peoples R China; 4.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China; 5.HKUST Jockey Club Inst Adv Study, Hong Kong, Peoples R China; 6.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Song, D.,Zhou, Gordon G. D.,Xu, Min,et al. Quantitative analysis of debris-flow flexible barrier capacity from momentum and energy perspectives[J]. ENGINEERING GEOLOGY,2019,251:81-92.
APA	Song, D.,Zhou, Gordon G. D.,Xu, Min,Choi, C. E.,Li, S.,&Zheng, Y..(2019).Quantitative analysis of debris-flow flexible barrier capacity from momentum and energy perspectives.ENGINEERING GEOLOGY,251,81-92.
MLA	Song, D.,et al."Quantitative analysis of debris-flow flexible barrier capacity from momentum and energy perspectives".ENGINEERING GEOLOGY 251(2019):81-92.