吸力式桶形基础作为一种新型的海上风机基础，正逐渐以单桶或者多桶组合形式被应用于海上风机支撑基础设计中。然而目前对应用于海上风机基础的桶形基础的极限承载力的研究仍存在研究不全面和结果不统一的问题。本文以宽浅型单桶基础为例，采用有限元软件Abaqus对海上风机吸力式桶形基础在饱和黏土地基中的竖向承载特性进行三维有限元分析。考虑桶土接触面分离条件对极限承载力和土体破坏模式的影响，并且对桶形基础长径比、土体的有效重度以及土体不排水抗剪强度分布对桶形基础竖向极限承载特性的影响进行分析。研究成果可以为海上风机吸力式桶形基础设计提供参考。
Suction bucket foundation is a new type of offshore wind turbine foundation. It can be used in a single-bucket or multi-buckets supported offshore wind turbine. However, the understanding on the bearing behavior of suction bucket foundation for offshore wind turbine is still limited and there is inconsistency in the existing research results. This work presents the results of three-dimensional finite element analyses of bucket foundations in normally consolidated clay under undrained condition. The ultimate vertical bearing capacity and failure mode of the suction bucket foundation under different contact conditions are investigated. The effects of the embedment ratio of the bucket foundation, the effective unit weight of the soil and the profile of undrained shear strength on the vertical bearing capacity of the bucket foundation are discussed.
2021,43(2): 120-125 收稿日期：2019-12-13
DOI：10.3404/j.issn.1672-7649.2021.02.025
分类号：TU473
基金项目：国家自然科学基金国际(地区)合作与交流项目(51761135012)；国家自然科学基金青年基金资助项目(51809165)
作者简介：廖倩(1995-),女,硕士研究生,研究方向为海上风机基础等相关力学问题
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