A non-Darcy flow model for a non-cohesive seabed involving wave-induced instantaneous liquefaction

doi:10.1016/j.oceaneng.2021.109807

IMECH-IR > 流固耦合系统力学重点实验室

	A non-Darcy flow model for a non-cohesive seabed involving wave-induced instantaneous liquefaction
	Zhou, Mo-Zhen 1; Qi WG(漆文刚)2,3 ; Jeng, Dong-Sheng 4; Gao FP(高福平)2,3
通讯作者	Qi, Wen-Gang(qiwengang@imech.ac.cn)
发表期刊	OCEAN ENGINEERING
	2021-11-01
卷号	239 页码:16
ISSN	0029-8018
摘要	Prediction of wave-induced instantaneous (oscillatory or momentary) liquefaction is particularly important for the design of offshore foundations. Most previous studies applied the linear Darcy model to characterize the porous flow in a seabed. This treatment was found to cause fallacious tensile stresses in a non-cohesive seabed. In this study, to overcome such shortcomings of previous models, a non-Darcy flow model is proposed based on a Karush-Kuhn-Tucker (KKT) condition. In the KKT condition, the primal constraint arises from the fact that the tensile behavior does not exist in a non-cohesive seabed, while the dual condition arises from the physical evidences that the pore-fluid velocity increases during liquefaction. The non-linearity of the present model is handled by the Newton-Raphson method within the standard finite element framework, without coding constrained variational principle. This highlights the convenience for numerical implementation. The difficulties in treating the nonlinearity by previous dynamic permeability model are also eliminated by the non Darcy flow model. The merits of the proposed model are validated by examining four numerical treatments and two liquefaction criteria. The liquefaction depth by the present model is found to be roughly 0.73 times of the value by the linear Darcy model.
关键词	Nonlinear complementarity problem Karush-Kuhn-Tucker (KKT) condition Penalty method Non-Darcy flow model Seabed liquefaction Wave-seabed interactions
DOI	10.1016/j.oceaneng.2021.109807
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000697004400004
关键词[WOS]	INDUCED PORE PRESSURE ; INDUCED SOIL RESPONSE ; FACED ROCKFILL DAM ; NUMERICAL-MODEL ; MOMENTARY LIQUEFACTION ; BURIED PIPELINE ; NONLINEAR-WAVE ; POROUS-MEDIA ; SAND ; PERMEABILITY
WOS研究方向	Engineering ; Oceanography
WOS类目	Engineering, Marine ; Engineering, Civil ; Engineering, Ocean ; Oceanography
资助项目	Fundamental Research Funds for the Central Universities, China[2021JBM034] ; National Natural Science Foundation of China[11825205] ; National Natural Science Foundation of China[51808034] ; National Natural Science Foundation of China[11972036]
项目资助者	Fundamental Research Funds for the Central Universities, China ; National Natural Science Foundation of China
论文分区	一类
力学所作者排名	1
RpAuthor	Qi, Wen-Gang
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/87424
专题	流固耦合系统力学重点实验室
作者单位	1.Beijing Jiaotong Univ, Key Lab Urban Underground Engn, Minist Educ, Beijing 100044, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.Griffith Univ, Sch Engn & Built Environm, Gold Coast Campus, Gold Coast, Qld 4222, Australia
推荐引用方式 GB/T 7714	Zhou, Mo-Zhen,Qi WG,Jeng, Dong-Sheng,et al. A non-Darcy flow model for a non-cohesive seabed involving wave-induced instantaneous liquefaction[J]. OCEAN ENGINEERING,2021,239:16.
APA	Zhou, Mo-Zhen,漆文刚,Jeng, Dong-Sheng,&高福平.(2021).A non-Darcy flow model for a non-cohesive seabed involving wave-induced instantaneous liquefaction.OCEAN ENGINEERING,239,16.
MLA	Zhou, Mo-Zhen,et al."A non-Darcy flow model for a non-cohesive seabed involving wave-induced instantaneous liquefaction".OCEAN ENGINEERING 239(2021):16.

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