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首页> 外文期刊>Ocean Engineering >Bearing behavior of wide-shallow bucket foundation for offshore wind turbines in drained silty sand
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Bearing behavior of wide-shallow bucket foundation for offshore wind turbines in drained silty sand

机译：排水粉砂中海上风力发电机宽浅桶形基础的承载特性

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摘要

The failure mode of the wide-shallow bucket foundation is different from that of the traditional suction caisson and the narrow-deep bucket foundation. Results from elasto-plastic analyses of 3D finite element models are presented, aimed at defining the shape of the yield envelope in the V-H, V-M, H-M and V-H-M spaces and the failure mode of the bucket foundation. The compressive bearing capacity of the wide-shallow bucket foundation was determined by the displacement. The corresponding load under a vertical displacement of 0.06D was the vertical ultimate bearing capacity. The vertical loading had an amplification effect on the horizontal load-bearing and moment capacity, and the horizontal loading which was in the opposite direction to the moment increased the moment capacity by 20-40%. New simplified calculation methods were proposed for the vertical load-bearing capacity and the overturning stability. In the proposed method, the vertical capacity consisted of a top plate resistance of the bucket and a side frictional resistance. The overturning stability was determined by the safety factor method, and depended on the location of the rotation point. A comparison between results from the finite element analysis and the simplified calculation methods showed that the proposed equations properly predicted the capacities of the wide-shallow bucket foundations.
机译：宽浅桶形基础的破坏方式不同于传统的沉箱和窄深桶形基础。给出了3D有限元模型的弹塑性分析结果，旨在定义V-H，V-M，H-M和V-H-M空间中的屈服包络形状以及铲斗基础的破坏模式。宽浅桶基础的抗压承载力由位移确定。垂直位移为0.06D时的相应载荷为垂直极限承载力。竖向荷载对水平承载力和弯矩承载力有放大作用，与弯矩相反方向的水平荷载使弯矩承载力提高了20-40％。针对竖向承载力和倾覆稳定性提出了新的简化计算方法。在提出的方法中，垂直承载力由铲斗的顶板阻力和侧向摩擦阻力组成。倾覆稳定性由安全系数法确定，并取决于旋转点的位置。有限元分析结果与简化计算方法的比较表明，所提方程能够正确预测宽浅桶形基础的承载力。

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