Numerical study of local scour effects on the lateral pile-soil interaction

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	Numerical study of local scour effects on the lateral pile-soil interaction
	Qi WG(漆文刚); Gao FP(高福平)
会议录名称	Scour and Erosion - Proceedings of the 8th International Conference on Scour and Erosion, ICSE 2016
	2016
会议名称	8th International Conference on Scour and Erosion, ICSE 2016
会议日期	September 12, 2016 - September 15, 2016
会议地点	Oxford, United kingdom
摘要	Local scour usually occurs around offshore pile foundations, which may bring the reduction of both the effective stresses in the surrounding soil and the effective pile embedment. Until now, the effects of local scour on the lateral pile-soil interaction have not been well understood. In this study, a 3-D finite element model for the lateral pile-soil interaction is proposed and verified with experimental results. An improved analysis approach is further presented for evaluating the local scour effects on the lateral pile-soil interaction by extracting p-y curves from the numerical results. The results indicate that scour could induce a significant transition of pile behavior for a monopile typically employed for offshore wind turbines. If the pile exhibits rigid structural behaviors after scour, the pile’s tip and shaft resistance may become a significant component of the whole soil resistance, which would render the traditional p-y approach inapplicable. For a given depth below the scour base, the p-y curves get significantly stiffer with increasing scour depth, especially at relatively shallow depths. The scour effects on the variation of p-y curves from the present numerical results are generally consistent with the existing centrifuge results. As the slope angle of scour holes decreases, the effect of the remaining sloping overburden soil above the level of the scour base reduces and the stiffening of the p-y curves at a given depth below the scour base is correspondingly alleviated. © 2016 Taylor & Francis Group, London.
关键词	3d Finite Element Model Analysis Approach Effective Stress Numerical Results Overburden Soils Pile Soil Interaction Structural Behaviors Surrounding Soils
课题组名称	LMFS流固土耦合力学(LHO)
ISBN号	9781138029798
URL	查看原文
收录类别	EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/60152
专题	流固耦合系统力学重点实验室
推荐引用方式 GB/T 7714	Qi WG,Gao FP. Numerical study of local scour effects on the lateral pile-soil interaction[C]Scour and Erosion - Proceedings of the 8th International Conference on Scour and Erosion, ICSE 2016,2016.

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