The capacities of tripod bucket foundation under uniaxial and combined loading
The capacities of tripod bucket foundation under uniaxial and combined loading
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三脚桶基础单轴及联合荷载承载力
DOI：
10.1016/j.oceaneng.2020.108400
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发表时间：
2021
影响因子：
5
通讯作者：
Wang Dong
中科院分区：
文献类型：
--
作者：
He Ben;Jiang Jun;Cheng Jian;Zheng Jingbin;Wang Dong
三脚架桶式基础是海上风力涡轮机的另一种基础。通过三维有限元分析，确定了粘土中三脚架桶形基础在单轴和联合荷载作用下的承载力。假定粘土不排水抗剪强度随深度线性增加，并通过粘着系数模拟桶身周围土体的重塑和桶身侵彻引起的地基-土摩擦减小。在此基础上，提出了土体非均质性、纵横比和斗间距比对单轴承载力因子和破坏位点的影响表达式。研究发现，尽管采用单轴承载力中出现的桶间距比作为关键拟合参数，但三脚架桶型基础的破坏轨迹在数学表达式上与传统桶型基础相似。
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.