中文摘要：

大直径桩广泛应用于近海风电基础中，采用桩侧增加鳍片的方法可有效抵抗水平推力。文章基于有限元分析软件ANSYS，采用服从Drucker_Prager屈服准则的完全弹塑性本构模型，建立了大直径薄壁钢管鳍桩三维有限元模型；针对不同鳍长、鳍宽、桩身长度和桩身直径等因素，分析了水平荷载作用下鳍桩的变形。计算结果表明，鳍桩抵抗水平荷载的能力明显高于普通单桩，与鳍宽相比，鳍长对鳍桩水平承载的能力影响较大。

英文摘要：

Large-diameter monopole is widely used as foundation for offshore wind power. To resist the lateral toad, fins are installed on top of the pile. Based on ANSYS software, a three-dimensional finite element model of large-diameter steel tubular fin pile is established by using completely elastoplastie constitutive model subject to Drucker-Prager yield criterion. Fin pile deformation under the lateral load and the factors influencing the horizontal bearing capacity, such as fin length, fin width, pile length and pile diameter, are analyzed. The results show that the ability of fin pile to resist horizontal load is obviously higher than that of general piles, Compared to the fin width, fin length has a greater influence on lateral load-bearing capacity of fin pile.