Quantitative analysis of debris-flow flexible barrier capacity from momentum and energy perspectives
文献类型：期刊论文
| 作者 | Song, D.; Zhou, Gordon G. D.; Xu, Min; Choi, C. E.; Li, S.; Zheng, Y. |
| 刊名 | ENGINEERING GEOLOGY
 |
| 出版日期 | 2019 |
| 卷号 | 251期号:-页码:81-92 |
| 关键词 | Debris flow Flexible barrier Kinetic energy Momentum flux Debris-structure interaction |
| ISSN号 | 0013-7952 |
| DOI | 10.1016/j.enggeo.2019.02.010 |
| 英文摘要 | In-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. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000464480600008 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/15024]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Beijing, Peoples R China; 3.Univ Chinese Acad Sci, Beijing, Peoples R China; 4.Geobrugg Chengdu Co Ltd, Chengdu, Sichuan, Peoples R China; |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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