三桶基础因其出色的承载性能，在海上风机基础中的应用日益广泛。由于三桶基础在服役期间长期承受波浪载荷，其水平循环响应对稳定性分析非常重要。通过室内模型试验，研究了黏性土地基三桶基础在不同循环荷载幅值比作用下的水平承载特性及其旋转中心的变化规律。试验结果表明：在循环荷载试验中，经过50次循环后，当循环荷载幅值比ζb=0.40时，变形基本稳定，累积变形为0.000 2D；而当ζb=0.60时，其变形呈现继续增大趋势，累积变形为0.011 0D。此外，随着循环次数的增加，三桶基础的旋转点逐渐向上移动，累积转角随之增大，但水平累积转角的变化速率逐渐减小并趋于稳定。

英文摘要:

Due to their excellent bearing performance, tripod bucket foundations are increasingly employed in offshore wind turbine foundations. As these foundations are exposed to long-term wave loading during operation, their horizontal cyclic response is essential for stability analysis. This study investigates the horizontal bearing behavior and the variation of the rotation center of tripod bucket foundations in clayey soil under different cyclic load amplitude ratios through laboratory model tests. The results show that after 50 cycles, at a cyclic load amplitude ratio of ζb = 0.40, deformation stabilizes, with an accumulated deformation of 0.000 2D. At ζb = 0.60, however, deformation continues to increase, with an accumulated deformation of 0.011 0D. With increasing cycles, the rotation point of the tripod bucket foundations gradually shifts upward, the accumulated rotation angle increases, and the rate of change of the horizontal accumulated rotation angle slows and eventually stabilizes.

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