A qualitative study on the lateral behavior of rock-socketed monopiles

IF 4 2区工程技术 Q1 ENGINEERING, CIVIL

Marine Structures Pub Date : 2025-07-03 DOI:10.1016/j.marstruc.2025.103892

Shamsher Sadiq , Hyeon-Jung Kim , Myoung-Soo Won , Young-Chul Park

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引用次数: 0

Abstract

Monopile supporting offshore wind turbines (OWT) in regions with shallow rock can benefit from rock-socketing. This study qualitatively investigates the effect of the rock layer on the serviceability limit state (SLS) and the ultimate limit state (ULS) of the monopiles. A nonlinear three-dimensional finite element model was constructed to simulate monopile–soil interaction and was validated using data from centrifuge experiments. The effect of the rock-socketing was analyzed for three cases flexible, semi-rigid and rigid, and compared with conditions in pure sand. The results are presented in terms of the limit state selection, lateral capacities, lateral deformation modes, soil deformation patterns, lateral earth pressure distribution and soil reaction curves (p-y). The finding indicates that rock-socketing significantly affects the lateral responses for semi-rigid and rigid monopiles, while its impact on the flexible monopiles is minimal. Furthermore, the study highlights the need to develop a generalized lateral earth pressure distribution for the simplified lateral response prediction of rock-socketed monopiles.

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嵌岩单桩横向特性的定性研究

单桩支撑的海上风力发电机（OWT）在浅岩地区可以受益于嵌岩。本研究定性地探讨了岩层对单桩使用极限状态（SLS）和极限状态（ULS）的影响。建立了单桩-土相互作用的非线性三维有限元模型，并用离心实验数据进行了验证。分析了柔性、半刚性和刚性三种情况下嵌岩的效果，并与纯砂条件进行了比较。结果包括极限状态选择、侧向承载力、侧向变形模式、土体变形模式、侧向土压力分布和土体反力曲线（p-y）。研究结果表明，嵌岩对半刚性单桩和刚性单桩的侧向响应影响显著，而对柔性单桩的侧向响应影响最小。此外，研究还强调了开发广义侧土压力分布以简化嵌岩单桩侧响应预测的必要性。

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来源期刊

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.