Impulse load characteristics of bouldery debris flow impact
文献类型：期刊论文
| 作者 | Song, D.1,2; Choi, C. E.3,4; Zhou, G. G. D.3,4; Kwan, J. S. H.5; Sze, H. Y.5 |
| 刊名 | GEOTECHNIQUE LETTERS
 |
| 出版日期 | 2018-06-01 |
| 卷号 | 8期号:2页码:111-117 |
| 关键词 | centrifuge modelling landslides particle-scale behaviour |
| ISSN号 | 2049-825X |
| DOI | 10.1680/jgele.17.00159 |
| 英文摘要 | 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. |
| 语种 | 英语 |
| WOS记录号 | WOS:000446911800004 |
| 出版者 | ICE PUBLISHING |
| 源URL | [http://ir.imde.ac.cn/handle/131551/23992]  |
| 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 | Song, D. |
| 作者单位 | 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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。