| 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 Publication | GEOTECHNIQUE LETTERS
 |
| ISSN | 2049-825X |
| EISSN | 2045-2543 |
| Volume | 8Issue:2Pages:111-117 |
| Subtype | Article |
| Abstract | Boulders 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. |
| Keyword | centrifuge modelling landslides particle-scale behaviour |
| DOI | 10.1680/jgele.17.00159 |
| Indexed By | SCI |
| WOS Keyword | GEOTECHNICAL CENTRIFUGE |
| Language | 英语 |
| Quartile | 4区 |
| Funding Project | 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] ; 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 | 否 |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Geological |
| WOS ID | WOS:000446911800004 |
| Funding Organization | Research 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 |
| Publisher | ICE PUBLISHING |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/23992 |
| Collection | 山地灾害与地表过程重点实验室 |
| Corresponding Author | Song, D. |
| Affiliation | 1.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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Impulse Load Charact（1157KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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