海上风电开孔单桩承载特性数值模拟

为分析开孔对单桩基础水平方向和轴向承载特性的影响规律，采用Abaqus数值分析软件建立大直径单桩基础桩身开孔数值模型。结果显示：桩身开孔对大直径单桩基础的水平承载特性有一定的影响，当水平载荷为1 050 kN时，开孔桩桩顶的水平位移为0.030 m,无孔桩桩顶的水平位移为0.026 m,两者相差13.3%;桩身开孔对大直径单桩基础的竖直承载特性影响不明显，当轴向载荷小于12 000 kN时，开孔对桩的竖直承载特性的影响可忽略不计；桩身开孔导致应力集中现象，竖直载荷和水平载荷作用下的应力集中系数分别为4.2和1.1。研究成果可为海上风电施工建设提供参考依据。

Numerical Simulation on Bearing Characteristics of Single Pile with Hole in Offshore Wind Power

In order to analyze the influence of hole opening on the horizontal and axial bearing characteristics of the single-pile foundation, the numerical model of the large-diameter single-pile foundation with hole is established by Abaqus software. The results show that: the hole of the pile body is of certain influence on the horizontal bearing characteristics of the large-diameter single pile foundation, when the horizontal load is 1 050 kN the horizontal displacement at the top of the pile with hole and without hole is 0.030 m and 0.026 m, respectively, and the difference between the two is 13.3%; the hole is of no obvious influence on the vertical bearing characteristics of the large-diameter single pile foundation, when the axial load is less than 12 000 kN the influence of the hole on the vertical bearing characteristics of the pile is negligible; the hole of the pile body leads to stress concentration, and the stress concentration factors under vertical load and horizontal load are 4.2 and 1.1, respectively. The research results can provide reference for the construction of offshore wind power.