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首页> 外文期刊>Ocean Engineering >Vertical performance of suction bucket foundation for offshore wind turbines in sand
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Vertical performance of suction bucket foundation for offshore wind turbines in sand

机译：沙地海上风力涡轮机的吸斗式基础的垂直性能

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摘要

The suction bucket foundation is turning to be an increasingly prevalent foundation for offshore wind turbines (OWTs). In this study, a series of centrifuge tests are performed to investigate the vertical bearing capacity of the suction bucket foundation in sandy soil under drained condition. Four bucket models are tested by considering the influence of aspect ratios (APs). The foundations are tested under compressive and tensile vertical loadings. The bucket foundation is in the general shear failure mode, and the ultimate bearing capacity increases with the AP. The tensile bearing capacity is smaller than the compressive capacity. The sharing factor of the base capacity and the skirt friction of the suction bucket foundation is determined with the assistance of the tensile test. The bucket lid provides the majority of the bearing capacity. The internal skirt friction is larger than the external skirt friction due to the soil constraint effect and the increased vertical stress. Several analytical methods are proposed to estimate the bearing capacity, and the results are compared with the test data. The bearing capacity equation is more applicable to the "wide-shallow" bucket foundations. The recommended design method is regarded as the upper bound when calculating the ultimate bearing capacity.
机译：抽气筒基础正逐渐成为海上风力涡轮机（OWT）的基础。在这项研究中，进行了一系列的离心试验，以研究排水条件下沙土中吸斗地基的竖向承载力。考虑到长宽比（AP）的影响，对四个存储桶模型进行了测试。基础在压缩和拉伸垂直载荷下进行测试。铲斗基础处于普通剪切破坏模式，并且最终承载力随AP的增加而增加。拉伸承载力小于压缩能力。借助拉力测试确定吸水桶基础的基础容量和裙边摩擦力的分配系数。铲斗盖提供了大部分的承载能力。由于土壤约束效应和垂直应力的增加，内部裙边摩擦大于外部裙边摩擦。提出了几种分析方法来估计承载力，并将结果与​​测试数据进行比较。承载力方程式更适用于“宽浅”铲斗基础。在计算极限承载力时，建议的设计方法被视为上限。

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