摘要
p-y曲线能够反映桩土非线性特征，是API，DNV等规范推荐的-类桩-土相互作翔分析方法，其计算公式是根据现场试桩数据归纳所得，但多为3m直径以内的试桩，对于直径4-6m甚至更大的海上风电单桩基础结构而言，p-y曲线法的适用性值得商榷。然而，直接针对这类大直径单桩进行现场试验来获取p-y曲线并对规范推荐公式进行验证或修正难度较大，为此，采用数值仿真技术，通过有限元模拟，对p-y曲线法的适用性进行了计算和分析。结果表明，规范给出的p-y曲线用于海上风电大直径钢管桩桩-土仿真分析误差较大。
As a method that can describe the non-linear characteristics of pile-soil, the p-y method is recommended by some codes （API, DNV, etc.） for pile-soil interaction analysis. The recommended p-y curve formulations are based on the results of lateral load test on instrumented piles with diameter less than or equal to 3 m, hut for the monopile with diameter of 4-6 m or even more used in the offshore wind farms, the suitability of p-y method needs to be proved. Because it is hard to obtain the real p-y curve or prove the recommended p-y curve through in-situ test for large-diameter piles, the numerical simulation is used to analyze the suitability of p-y method. The simulation results show that it is unreasonable to use the recommended p-y curves for pile-soil interaction analysis of large-diameter monopile.
出处
《水力发电》
北大核心
2011年第10期96-99,共4页
Water Power
基金
中国水电顾问集团华东勘测设计研究院院立项课题海上风电基础结构关键技术研究(KY2010-02-19)
海上风电基础结构动力响应及疲劳寿命分析(KY2011-02-07-02)
关键词
海上风电
桩土作用
P-Y曲线
数值模拟
offshore wind turbine
pile-soil interaction
p-y curve
numerical simulation
