Abstract Tripod bucket foundations are an alternative foundation for offshore wind turbines. Three-dimensional finite element analyses were carried out to determine the capacities of tripod bucket foundations in clay under uniaxial and combined loading. The undrained shear strength of clay is assumed to increase linearly with depth, and the remolded soil around the bucket and reduced foundation-soil friction caused by bucket penetration are modeled through an adhesion factor. Based on the numerical results, expressions for uniaxial capacity factors and failure loci are proposed, as functions of soil non-homogeneity, aspect ratio and bucket spacing ratio. It is found that the failure loci of tripod bucket foundations are similar to that of conventional buckets in mathematic expression, although the bucket spacing ratio that appears in uniaxial capacities is used as a key fitting parameter.

中文翻译：

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三脚架斗式基础在单轴和复合荷载作用下的承载力

摘要 三脚架斗式基础是海上风力发电机的替代基础。进行三维有限元分析，以确定在单轴和组合加载下粘土中的三角架桶形基础的承载力。假定粘土的不排水剪切强度随深度线性增加，铲斗周围的重塑土和铲斗穿透引起的地基与土壤摩擦的减少通过粘附因子建模。基于数值结果，提出了单轴承载力因子和破坏轨迹的表达式，作为土壤非均匀性、纵横比和斗间距比的函数。发现三脚架斗式基础的破坏轨迹在数学表达式上与常规斗相似，