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Quantitative analysis of debris-flow flexible barrier capacity from momentum and energy perspectives
Song, D.1,2; Zhou, Gordon G. D.1,2; Xu, Min3; Choi, C. E.4,5; Li, S.1; Zheng, Y.6
Corresponding AuthorZhou, Gordon G. D.(gordon@imde.ac.cn)
2019-03-09
Source PublicationENGINEERING GEOLOGY
ISSN0013-7952
Volume251Pages:81-92
SubtypeArticle
Contribution Rank1
AbstractIn-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.
KeywordDebris flow Flexible barrier Kinetic energy Momentum flux Debris-structure interaction
DOI10.1016/j.enggeo.2019.02.010
Indexed BySCI
WOS KeywordLANDSLIDE ; DESIGN
Language英语
Funding ProjectNational 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 Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000464480600008
Funding OrganizationNational Natural Science Foundation of China, China ; CAS Light of West China Program, China ; Research Grants Council of the Government of Hong Kong SAR, China
PublisherELSEVIER SCIENCE BV
EI Accession NumberELSEVIER SCIENCE BV
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25905
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorZhou, Gordon G. D.
Affiliation1.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
Recommended Citation
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.
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