翼板长宽比和夹角对加翼桩水平承载性能影响分析

Analysis of the impact of length-to-width ratios and angles of the wing plate on the lateral bearing capacity of wing-monopile

加翼桩是优化的单桩基础形式,适用以承受水平荷载为主的风电基础。文章基于ABAQUS有限元分析软件构建加翼桩三维数值仿真模型,选择5种长宽比的矩形翼板、4种夹角梯形翼板研究翼板形状对加翼桩桩身位移、弯矩、应力和极限承载力的影响。研究结果表明,矩形翼板长宽比和梯形翼板夹角对加翼桩水平承载性能影响较大,翼板对加翼桩泥面处水平位移的影响远大于桩身最大弯矩的影响,相同翼板面积时扁长形翼板对加翼桩水平承载力的提升效果明显优于竖长形翼板,倒梯形翼板对加翼桩水平承载力的提升效果优于正梯形和矩形翼板。

Wing-monopile is an optimized foundation for offshore wind turbines, which is mainly used to bearlateral loads and moments. The impacts of the wing plate shape on the lateral bearing capacity of wing-monopilewere analyzed by choosing 5 kinds of length-to-width ratios of rectangular wing plates and 4 kinds of angles oftrapezoidal wing plates which were based on the ABAQUS. The results show that the length-to-width ratios ofrectangular wing plate and the angles of trapezoidal wing plate have a great influence on the lateral bearing capacityof the wing-monopile, and the reduction of the lateral displacement is more obvious than that of the moment. Theprolate shape of wing plate is superior to the vertical elongate shape of rectangular wing plate in improving thelateral bearing capacity. Besides, the increase of the lateral bearing capacity of the inverted shape is more than thatof the positive shape of trapezoidal wing plate or shape of rectangular wing plate.