尺寸效应下单桩水平受荷特性数值研究  

Numerical analysis of load-bearing behavior of laterally loaded monopile considering diameter effect

作　　者：潘华林 刘睿[2,3,4] 张宝龙 PAN Hualin;LIU Rui;ZHANG Baolong(Zhejiang Provincial Energy Group Company Ltd.,Hangzhou 310007,Zhejiang,China;Hainan institute,Zhejiang University,Sanya 572025,Hainan,China;Ocean College,Zhejiang University,Zhoushan 316021,Zhejiang,China;Department of Architecture and Civil Engineering,City University of Hong Kong,Hong Kong 999077,China)

机构地区：[1]浙江省能源集团有限公司,浙江杭州310007 [2]浙江大学海南研究院,海南三亚572025 [3]浙江大学海洋学院,浙江舟山316021 [4]香港城市大学建筑学与土木工程系,中国香港999077

出　　处：《地基处理》2025年第1期43-50,共8页Journal of Ground Improvement

摘　　要：目前钢管单桩基础广泛应用于海上风电,随着单桩直径增大,单桩水平受荷响应表现出明显的尺寸效应。但针对尺寸效应下单桩水平受荷特性,尤其是土抗力对应的水平承载贡献研究较少。本文基于ABAQUS建立了柔性桩、半刚性桩及刚性桩的水平受荷分析数值模型,并通过离心机试验验证了模型的可靠性。随后结合尺寸效应下桩周土体位移场,评估不同土抗力对单桩水平受荷的承载贡献值,并揭示了水平土抗力的空间分布规律。研究表明,在抵抗水平受荷过程中,水平土抗力提供的承载贡献最高,桩外侧摩阻力其次,基底抗力和桩内侧摩阻力贡献最低。并且随着桩身响应逐渐变为刚性,侧摩阻力和基底抗力的贡献随之增大,桩身浅层土体和深层土体都将被充分调动,从而提供显著抗力矩。研究结果可为设计和优化水平受荷单桩提供一定的参考。At present,steel pipe monopile foundation is widely used in offshore wind power.As the diameter of the monopile increases,the horizontal load response of the monopile shows a significant diameter effect.However,there is relatively little research on the horizontal load characteristics of monopile under diameter effect,especially the horizontal bearing contribution corresponding to soil resistance.In this paper,various numerical models of monopile with different pile-soil relative stiffness were established by ABAQUS and then validated by several centrifuge experiments.Subsequently,combined with the displacement field of soil around the pile under diameter effect,the contribution values of different soil resistance to the horizontal load bearing of monopile were evaluated,and the spatial distribution law of horizontal soil resistance was revealed.The results show that in the process of resisting horizontal loads,the horizontal soil resistance provides the highest bearing contribution,followed by the external friction resistance,and the base resistance and the inner friction resistance contribute the least.As the response of pile body gradually becomes rigid,the contribution of side friction resistance and base resistance will increase,and both shallow soil and deep soil of pile body will be fully mobilized to provide significant resistance moment.The research results can provide some reference for the design and optimization of horizontal load monopile.

关 键 词：尺寸效应 水平受荷桩 承载贡献 空间分布 数值模拟 

分 类 号：TU473[建筑科学—结构工程]