Numerical modeling of multi-directional lateral behaviour of pile foundations for offshore wind turbines in clay

IF 4.6 2区 工程技术 Q1 ENGINEERING, CIVIL
Shasha Ren , Deqiong Kong , Yueming Du , Yuan Chen , Bin Zhu
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引用次数: 0

Abstract

This study investigates the lateral behavior of pile foundations for offshore wind turbines (OWT) under various loading paths in clay, including arc-shaped and cross-shaped trajectories, as well as the impact of occasional deviated loads on displacement accumulation. A finite element model that incorporates soil softening behaviour is established and validated against centrifuge tests conducted by the authors as well as reported in the literature. Following that a parametric study is conducted to explore the complex pile-soil interactions and examine how multi-directional loading influences the behavior of pile foundations. The results show that multi-directional loading significantly enhances pile displacement accumulation, with non-coaxial behavior observed as a mismatch between peak load and peak displacement. It is for the first time revealed that the most undesirable deviated loading angle ranges between 45° and 60°, and even one occasional event of deviated load can substantially impact cumulative displacement. The study further emphasizes the need to introduce a multi-directional loading factor to the design of OWT pile foundations.
粘土中海上风力发电机桩基多向侧向行为的数值模拟
本文研究了海上风力发电机(OWT)桩基在粘土中不同荷载路径下的横向行为,包括弧形和十字形轨迹,以及偶尔偏离荷载对位移积累的影响。建立了一个包含土壤软化行为的有限元模型,并对作者进行的离心机试验以及文献报道进行了验证。然后进行了参数化研究,探讨了复杂的桩土相互作用,并研究了多向荷载对桩基行为的影响。结果表明:多向荷载显著增强了桩身位移积累,且表现为峰值荷载与峰值位移失配的非同轴行为;首次揭示了最不期望的加载角在45°~ 60°之间,即使是一次偶然的加载偏离事件也会对累积位移产生重大影响。研究进一步强调了将多向荷载系数引入灌注桩基础设计的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ocean Engineering
Ocean Engineering 工程技术-工程:大洋
CiteScore
7.30
自引率
34.00%
发文量
2379
审稿时长
8.1 months
期刊介绍: Ocean Engineering provides a medium for the publication of original research and development work in the field of ocean engineering. Ocean Engineering seeks papers in the following topics.
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