Numerical simulation of the seismic liquefaction mechanism in an offshore loosely deposited seabed

doi:10.1007/s10064-015-0803-0

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Numerical simulation of the seismic liquefaction mechanism in an offshore loosely deposited seabed
	Ye, Jianhong 1,2; Wang, Gang 2
刊名	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
	2016
卷号	75 期号:3 页码:1183-1197
关键词	Offshore loose sediments Quaternary seabed soil Seismic dynamics Progressive liquefaction Pore pressure build up Japanese 311 off-Pacific coast earthquake
ISSN号	1435-9529
DOI	10.1007/s10064-015-0803-0
英文摘要	As a natural foundation of offshore structures, the instability of offshore seabed foundations is the dominant factor for the failure of offshore structures in strong earthquake events. It has been reported that a great number of offshore structures have failed due to soil liquefaction of Quaternary loosely deposited seabed during several recent strong seismic events. At present, countless investigations on seismic wave-induced liquefaction in on-land soil have been conducted. However, investigations on seismic wave-induced seabed soil liquefaction in an offshore environment is limited. In this study, a coupled numerical model [fluid-structure-seabed interaction (FSSI)-CAS 2D] was utilized to investigate the seismic wave-induced liquefaction mechanism in newly deposited seabed soil. The advanced soil constitutive model PZIII was adopted to describe the nonlinear dynamic behavior of loose soil. In computation, the variation of void ratio e, and related variation of soil permeability is taken into consideration; and the hydrostatic pressure acting on the seabed surface, as a boundary condition value, is automatically updated based on seabed deformation. The numerical results indicate that a loose seabed could liquefy completely, and that seabed soil liquefaction initiates at the surface of the seabed, then progresses downward. It is also indicated that the advanced soil constitutive model, Pastor-Zienkiewicz Mark III (PZIII), is capable of describing the post-liquefaction behavior of loose seabed soil to some extent.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000384816300021
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3911]
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, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech ; 2.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn
推荐引用方式 GB/T 7714	Ye, Jianhong,Wang, Gang. Numerical simulation of the seismic liquefaction mechanism in an offshore loosely deposited seabed[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2016,75(3):1183-1197.
APA	Ye, Jianhong,&Wang, Gang.(2016).Numerical simulation of the seismic liquefaction mechanism in an offshore loosely deposited seabed.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,75(3),1183-1197.
MLA	Ye, Jianhong,et al."Numerical simulation of the seismic liquefaction mechanism in an offshore loosely deposited seabed".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 75.3(2016):1183-1197.