Debris flow impact on flexible barrier: effects of debris-barrier stiffness and flow aspect ratio
文献类型：期刊论文
| 作者 | Song, Dong-ri; Zhou, Gordon G. D.; Choi, Clarence Edward; Zheng, Yun |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2019 |
| 卷号 | 16期号:7页码:1629-1645 |
| 关键词 | Debris flow Flexible barrier Impact Stiffness Flow aspect ratio |
| ISSN号 | 1672-6316 |
| DOI | 10.1007/s11629-018-5314-6 |
| 英文摘要 | Conventionally, 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. |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000474574600012 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/14949]  |
| 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.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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