IMHE OpenIR  > 山地灾害与地表过程重点实验室
Impulse load characteristics of bouldery debris flow impact
Song, D.1,2; Choi, C. E.3,4; Zhou, G. G. D.3,4; Kwan, J. S. H.5; Sze, H. Y.5
2018
Source PublicationGEOTECHNIQUE LETTERS
ISSN2049-825X
EISSN2045-2543
Volume8Issue:2Pages:111-117
SubtypeArticle
AbstractBoulders entrained in debris flows are the main cause of damage to debris-resisting structures. Poly-dispersity leads to grain-size segregation, which causes boulders to migrate to the free surface and then accumulate at the front of the flow. Despite the importance of grain-size segregation, the current design of debris-resisting structures does not explicitly consider its effects on impact. In this study, two series of centrifuge tests were carried out to investigate the impact behaviour of mono-disperse bouldery flows and bi-disperse flows comprising boulders mixed with fine debris material. The diameter of the boulders was varied to study the effects of boulder size on the dynamic response of an instrumented model rigid barrier. The results reveal that, as the boulder size increases, a transition from progressive loading to predominantly impulse loading is observed. Boulders floating on the fine debris can induce even higher peak loads compared with mono-disperse bouldery flow. A new relationship between an equivalent dynamic pressure coefficient for the hydrodynamic approach and boulder size is established. This new relationship serves as a criterion for distinguishing between the boulders and fine debris in the design of structural countermeasures.
Keywordcentrifuge modelling landslides particle-scale behaviour
DOI10.1680/jgele.17.00159
Indexed BySCI
WOS KeywordGEOTECHNICAL CENTRIFUGE
Language英语
Quartile4区
Funding ProjectResearch Grants Council of the Government of Hong Kong SAR, China[T22-603/15N] ; Research Grants Council of the Government of Hong Kong SAR, China[16209717] ; Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program ; National Natural Science Foundation of China[11672318] ; National Natural Science Foundation of China[51709052] ; HKUST Jockey Club Institute for Advanced Study ; Hong Kong Jockey Club Disaster Preparedness and Response Institute[HKJCDPRI18EG01]
TOP
WOS Research AreaEngineering
WOS SubjectEngineering, Geological
WOS IDWOS:000446911800004
Funding OrganizationResearch Grants Council of the Government of Hong Kong SAR, China ; Chinese Academy of Sciences (CAS) Pioneer Hundred Talents Program ; National Natural Science Foundation of China ; HKUST Jockey Club Institute for Advanced Study ; Hong Kong Jockey Club Disaster Preparedness and Response Institute
PublisherICE PUBLISHING
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23992
Collection山地灾害与地表过程重点实验室
Corresponding AuthorSong, D.
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
4.HKUST Jockey Club Inst Adv Study, Hong Kong, Hong Kong, Peoples R China
5.Geotech Engn Off, Civil Engn & Dev Dept, Hong Kong, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Song, D.,Choi, C. E.,Zhou, G. G. D.,et al. Impulse load characteristics of bouldery debris flow impact[J]. GEOTECHNIQUE LETTERS,2018,8(2):111-117.
APA Song, D.,Choi, C. E.,Zhou, G. G. D.,Kwan, J. S. H.,&Sze, H. Y..(2018).Impulse load characteristics of bouldery debris flow impact.GEOTECHNIQUE LETTERS,8(2),111-117.
MLA Song, D.,et al."Impulse load characteristics of bouldery debris flow impact".GEOTECHNIQUE LETTERS 8.2(2018):111-117.
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