复合荷载下海上钢管桩基础p-y曲线法研究

对于海上钢管桩基础的水平承载特性通常采用p-y曲线法进行分析，由于海洋环境复杂性，海上桩基往往同时承受侧向，竖向和力矩荷载，桩体处于复合受力状态。由单一水平向加载试验获得的p-y曲线法对于基础在复合荷载作用下承载特性分析的有效性尚未有定论。通过三维数值模拟，在得到离心模型试验验证的基础上，探讨了H-V和H-M复合加载下数值模拟与p-y曲线法对于桩体位移和弯矩计算的差异，计算结果可为桩基设计提供依据。

P-y curve methods of steel pipe pile foundations under combined loads

The p-y curve method is often used to analyze the horizontal bearing capacity of steel pipe pile foundations. But in offshore engineering, it is inconclusive because most existing methods for determining p-y curves, based on a number of cases of laterally loaded piles, are highly empirical and the pile foundations are often subjected to complex multi-directional loading conditions. The present study develops a series of p-y curves for a single pile under H-V and H-M composite loading through three-dimensional FEM simulations and compares the results with the p-y curves in previous studies.