| Spatiotemporal evolution of excess pore pressures in a silty seabed under progressive waves during residual liquefaction | |
Li CF(李畅飞)1,2; Wang YF3 ; Gao FP(高福平)1,2; Yang LJ(杨鲤境)1,2
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| Corresponding Author | Gao, Fu-Ping([email protected]) |
| Source Publication | APPLIED OCEAN RESEARCH
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| 2022-12-01 | |
| Volume | 129Pages:14 |
| ISSN | 0141-1187 |
| Abstract | Both transient and residual pore pressure responses are induced as ocean waves propagate over a silty seabed. In this study, the spatiotemporal evolution of excess pore pressure in a silty seabed under progressive waves was physically modelled in a large wave flume. Three typical stages were identified in the process of residual liquefaction via flume observations, including quasi-elastic, intensive build-up of residual pore pressure, and continuous liquefaction stages. During the initial quasi-elastic stage before the liquefaction of the silt bed, the transient pore pressure can be well predicted by the analytical solution based on poro-elastic theory. After that, the residual pore pressure builds up intensively to its maximum value, even in the case that the transient pore pressure is nearly negligible at deep soil layer. Once the residual liquefaction occurs, the poro-elastic theory becomes invalid for describing the pore pressure response. The residual liquefaction is not simultaneously induced within the entire bed, but gradually progresses downward from the shallow layer of the silt bed to deeper. The pore pressure amplitude is significantly amplified after the silt liquefies, while no amplitudeamplification was observed within the un-liquefied silt. An amplification ratio (zeta) is proposed to characterize the amplification effect and distinguish the onset of residual liquefaction. The value of zeta during the continuous liquefaction stage is found to be one order of magnitude larger than that in the quasi-elastic stage. Comparisons with the existing centrifuge tests further indicate that the critical cyclic stress ratio for the silt bed is much smaller than that for the sand bed, implying the silt bed is more prone to residual liquefaction. |
| Keyword | Pore pressure Wave loading Flume observation Silty seabed Seabed liquefaction |
| DOI | 10.1016/j.apor.2022.103401 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000899530300004 |
| WOS Keyword | LIQUEFIED SOIL ; SAND ; PIPELINES |
| WOS Research Area | Engineering ; Oceanography |
| WOS Subject | Engineering, Ocean ; Oceanography |
| Funding Project | National Natural Science Foundation of China ; Strategic Priority Research Program (Type -B) of Chinese Academy of Sciences ; [11825205] ; [12061160463] ; [XDB22030000] |
| Funding Organization | National Natural Science Foundation of China ; Strategic Priority Research Program (Type -B) of Chinese Academy of Sciences |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Gao, Fu-Ping |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/91270 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Univ Melbourne, Fac Engn & Informat Technol, Dept Infrastruct Engn, Melbourne, Vic 3010, Australia |
| Recommended Citation GB/T 7714 | Li CF,Wang YF,Gao FP,et al. Spatiotemporal evolution of excess pore pressures in a silty seabed under progressive waves during residual liquefaction[J]. APPLIED OCEAN RESEARCH,2022,129:14.Rp_Au:Gao, Fu-Ping |
| APA | 李畅飞,Wang YF,高福平,&杨鲤境.(2022).Spatiotemporal evolution of excess pore pressures in a silty seabed under progressive waves during residual liquefaction.APPLIED OCEAN RESEARCH,129,14. |
| MLA | 李畅飞,et al."Spatiotemporal evolution of excess pore pressures in a silty seabed under progressive waves during residual liquefaction".APPLIED OCEAN RESEARCH 129(2022):14. |
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| Jp2022FA021.pdf（5842KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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