Geophysical flows impacting a flexible barrier: effects of solid-fluid interaction
文献类型：期刊论文
| 作者 | Song, D.1,2,3 ; Choi, C. E.3,4; Ng, C. W. W.3; Zhou, G. G. D.1,2
|
| 刊名 | LANDSLIDES
 |
| 出版日期 | 2018 |
| 卷号 | 15期号:1页码:99-110 |
| 关键词 | Geophysical Flows Solid-fluid Interaction Impact Flexible Barrier Centrifuge Modelling |
| ISSN号 | 1612-510X |
| DOI | 10.1007/s10346-017-0856-1 |
| 通讯作者 | C. E. Choi |
| 英文摘要 | Flexible barriers undergo large deformation to extend the impact duration, and thereby reduce the impact load of geophysical flows. The performance of flexible barriers remains a crucial challenge because there currently lacks a comprehensive criterion for estimating impact load. In this study, a series of centrifuge tests were carried out to investigate different geophysical flow types impacting an instrumented flexible barrier. The geophysical flows modelled include covered in this study include flood, hyperconcentrated flow, debris flow, and dry debris avalanche. Results reveal that the relationship between the Froude number, Fr, and the pressure coefficient alpha strongly depends on the formation of static deposits called dead zones which induce static loads and whether a run-up or pile-up impact mechanism develops. Test results demonstrate that flexible barriers can attenuate peak impact loads of flood, hyperconcentrated flow, and debris flow by up to 50% compared to rigid barriers. Furthermore, flexible barriers attenuate the impact load of dry debris avalanche by enabling the dry debris to reach an active failure state through large deformation. Examination of the state of static debris deposits behind the barriers indicates that hyperconcentrated and debris flows are strongly influenced by whether excessive pore water pressures regulate the depositional process of particles during the impact process. This results in significant particle rearrangement and similar state of static debris behind rigid barrier and the deformed full-retention flexible barrier, and thus the static loads on both barriers converge. |
| 语种 | 英语 |
| WOS记录号 | WOS:000419461100008 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/20675]  |
| 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 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Inst Mt Hazards & Environm, 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.Hong Kong Univ Sci & Technol, HKUST Jockey Club Inst Adv Study, Kowloon, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, D.,Choi, C. E.,Ng, C. W. W.,et al. Geophysical flows impacting a flexible barrier: effects of solid-fluid interaction[J]. LANDSLIDES,2018,15(1):99-110. |
| APA | Song, D.,Choi, C. E.,Ng, C. W. W.,&Zhou, G. G. D..(2018).Geophysical flows impacting a flexible barrier: effects of solid-fluid interaction.LANDSLIDES,15(1),99-110. |
| MLA | Song, D.,et al."Geophysical flows impacting a flexible barrier: effects of solid-fluid interaction".LANDSLIDES 15.1(2018):99-110. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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