A new model for wave-induced instantaneous liquefaction in a non-cohesive seabed with dynamic permeability
文献类型：期刊论文
| 作者 | Zhou MZ4; Jeng DS3; Qi WG(漆文刚)1,2
|
| 刊名 | OCEAN ENGINEERING
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 213页码:15 |
| 关键词 | Dynamic permeability Excess pore pressure Soil liquefaction Wave-seabed interaction |
| ISSN号 | 0029-8018 |
| DOI | 10.1016/j.oceaneng.2020.107597 |
| 通讯作者 | Qi, Wen-Gang(qiwengang@imech.ac.cn) |
| 英文摘要 | Wave-induced instantaneous liquefaction is crucial to evaluating the stability of offshore foundations. For the instantaneous liquefaction, most previous studies treated the seabed as an invariant poro-elastic medium and hence led to nonphysical tensile stress in the non-cohesive liquefied zone. In this study, a penalty-like dynamic permeability model is proposed, based on the experimental evidences of permeability increase during soil liquefaction. The nonlinearity induced by the dynamic permeability is solved by an iterative procedure, based on the Newton-Raphson method. The numerical procedure is implemented in an in-house code and compared with analytical solutions under the constant permeability assumption. Numerical observations validate that the proposed dynamic permeability model can alleviate or even eliminate the nonphysical tensile stress in the instantaneously-liquefied zone. In contrast to the constant permeability model, the new model with a dynamic permeability obtains a better agreement with existing cylinder tests under one-dimensional wave loading conditions. For the numerical examples presented, the liquefaction depths predicted by constant permeability can be up to twice of those by the new dynamic permeability model. It is concluded that the conventional model with constant permeability overestimates the liquefaction potential. |
| 分类号 | 一类 |
| WOS关键词 | INDUCED PORE PRESSURE ; SOIL ; SAND ; DISSIPATION ; BEHAVIOR ; DEPTH |
| 资助项目 | National Natural Science Foundation of China[51808034] ; National Natural Science Foundation of China[11972036] |
| WOS研究方向 | Engineering ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:000562767200008 |
| 资助机构 | National Natural Science Foundation of China |
| 其他责任者 | Qi, Wen-Gang |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/84974]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; 3.Griffith Univ, Sch Engn & Built Environm, Gold Coast Campus, Gold Coast, Qld 4222, Australia; 4.Beijing Jiaotong Univ, Key Lab Urban Underground Engn, Minist Educ, Beijing 100044, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhou MZ,Jeng DS,Qi WG. A new model for wave-induced instantaneous liquefaction in a non-cohesive seabed with dynamic permeability[J]. OCEAN ENGINEERING,2020,213:15. |
| APA | Zhou MZ,Jeng DS,&漆文刚.(2020).A new model for wave-induced instantaneous liquefaction in a non-cohesive seabed with dynamic permeability.OCEAN ENGINEERING,213,15. |
| MLA | Zhou MZ,et al."A new model for wave-induced instantaneous liquefaction in a non-cohesive seabed with dynamic permeability".OCEAN ENGINEERING 213(2020):15. |
入库方式： OAI收割
来源：力学研究所
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