Wave & current-induced progressive liquefaction in loosely deposited seabed
文献类型：期刊论文
| 作者 | Yang, Guoxiang2; Ye, Jianhong1,2 |
| 刊名 | OCEAN ENGINEERING
 |
| 出版日期 | 2017 |
| 卷号 | 142页码:303-314 |
| 关键词 | Pore pressure build up Progressive residual liquefaction Loosely deposited seabed floor Wave & current Pastor-Zienkiewicz Mark III FSSI-CAS 2D |
| ISSN号 | 0029-8018 |
| DOI | 10.1016/j.oceaneng.2017.07.027 |
| 英文摘要 | Quaternary newly deposited loose seabed soil widely distributes in offshore area in the world. Wave-induced residual liquefaction in loose seabed floor brings great risk to the stability of offshore structures in extreme climate. Understanding of the characteristics of wave-induced residual liquefaction in loose seabed is meaningful for engineers involved in design of offshore structures. In this study, wave & current-induced residual liquefaction in loose seabed floor is investigated deeply and comprehensively adopting a validated integrated numerical model. The time history of wave & current-induced pore pressure, effective stress, shear stress, lateral pressure coefficient K-0, stress angle, displacement of seabed soil are all quantitatively demonstrated. The variation process of progressive liquefaction, stress path, as well as stress-strain relation also are illustrated in detail. The classic effective stress principle has been modified to describe the nonlinear phenomenon that the reduction rate of vertical effective stress sigma'(Z) is faster than that of horizontal effective stress sigma'(x) and sigma'(y) accompanying residual pore pressure build up. It is shown that the integrated numerical model FSSI-CAS 2D incorporating PZIII soil model can effectively and precisely capture a series of nonlinear dynamic response characteristics of loose seabed floor under wave & current loading. The computational results further confirm the wave & current-induced liquefaction in loose seabed soil is progressively downward, initiating at seabed surface. Besides, it is found that three physical processes, including vertical distribution of oscillatory pore pressure, time history of stress angle as well as lateral pressure coefficient K-0 could be taken as indirect indicator to judge the occurrence of wave-induced residual liquefaction, and predict the residual liquefaction depth in loose seabed. It is also found that the progressive liquefaction process is significantly affected by wave height, permeability and saturation of seabed soil. |
| WOS研究方向 | Engineering ; Oceanography |
| 语种 | 英语 |
| WOS记录号 | WOS:000410010700028 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4143]  |
| 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 Rock & Soil Mech, State Key Lab Geomech & Geotech Engn 2.China Univ Geosci, Sch Engn & Technol, Dept Civil Engn ; |
| 推荐引用方式 GB/T 7714 | Yang, Guoxiang,Ye, Jianhong. Wave & current-induced progressive liquefaction in loosely deposited seabed[J]. OCEAN ENGINEERING,2017,142:303-314. |
| APA | Yang, Guoxiang,&Ye, Jianhong.(2017).Wave & current-induced progressive liquefaction in loosely deposited seabed.OCEAN ENGINEERING,142,303-314. |
| MLA | Yang, Guoxiang,et al."Wave & current-induced progressive liquefaction in loosely deposited seabed".OCEAN ENGINEERING 142(2017):303-314. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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