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Debris flow impact on flexible barrier: effects of debris-barrier stiffness and flow aspect ratio
Song, Dong-ri1,2; Zhou, Gordon G. D.1,2; Choi, Clarence Edward3,4; Zheng, Yun5
Corresponding AuthorZhou, Gordon G. D.(gordon@imde.ac.cn)
2019-07-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume16Issue:7Pages:1629-1645
AbstractConventionally, flexible barriers are rated based on their ability to resist a free-falling boulder with a particular input energy. However, there is still no well-accepted approach for evaluating performance of flexible barrier under debris flow impact. In this study, a large-nonlinear finite-element model was used to back-analyze centrifuge tests to discern the effects of impact material type, barrier stiffness, and flow aspect ratio (flow height to flow length) on the reaction force between the impacting medium and flexible barrier. Results show that, in contrast to flexible barriers for resisting rockfall, the normal impact force induced by the highly frictional and viscous debris is insensitive to barrier stiffness. This is because the elongated distributions of kinetic energy are mainly dissipated by the internal and boundary shearing, and only a small portion is forwarded to the barrier. Furthermore, a new stiffness number is proposed to characterize the equivalent stiffness between a debris flow or a boulder, and a flexible barrier. Under the circumstance of an extremely elongated debris flow event, i.e., low aspect ratio, the load on a barrier is dominated by the static component and thus not sensitive to the barrier stiffness.
KeywordDebris flow Flexible barrier Impact Stiffness Flow aspect ratio
DOI10.1007/s11629-018-5314-6
Indexed BySCI
WOS KeywordEXPERIMENTAL TESTS ; LANDSLIDE ; DESIGN ; SLIDES ; MESH
Language英语
Funding ProjectNational Natural Science Foundation of China[51809261] ; National Natural Science Foundation of China[11672318] ; National Natural Science Foundation of China[51709052] ; Research 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] ; Hong Kong Jockey Club Disaster Preparedness and Response Institute[HKJCDPRI18EG01]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000474574600012
Funding OrganizationNational Natural Science Foundation of China ; Research Grants Council of the Government of Hong Kong SAR, China ; Hong Kong Jockey Club Disaster Preparedness and Response Institute
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26497
Collection山地灾害与地表过程重点实验室
Corresponding AuthorZhou, Gordon G. D.
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
4.HKUST Jockey Club Inst Adv Study, Hong Kong, Peoples R China
5.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Song, Dong-ri,Zhou, Gordon G. D.,Choi, Clarence Edward,et al. Debris flow impact on flexible barrier: effects of debris-barrier stiffness and flow aspect ratio[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(7):1629-1645.
APA Song, Dong-ri,Zhou, Gordon G. D.,Choi, Clarence Edward,&Zheng, Yun.(2019).Debris flow impact on flexible barrier: effects of debris-barrier stiffness and flow aspect ratio.JOURNAL OF MOUNTAIN SCIENCE,16(7),1629-1645.
MLA Song, Dong-ri,et al."Debris flow impact on flexible barrier: effects of debris-barrier stiffness and flow aspect ratio".JOURNAL OF MOUNTAIN SCIENCE 16.7(2019):1629-1645.
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