复合加载模式下四筒导管架基础承载特性分析

ANALYSIS OF BEARING CHARACTERISTICS OF FOUR-BUCKET JACKETFOUNDATION IN COMBINED LOADING MODE

针对海上风电四筒导管架基础在砂土中的复合承载特性,采用数值模拟的方法,计算5种不同荷载组合下的四筒导管架基础的极限承载力。为分析不同加载模式下筒基长径比和筒间距对基础极限承载力的影响,分别改变筒高和吸力筒圆心距离进行计算并绘制破坏包络线。结果表明,在竖向荷载作用下,基础的水平极限承载力先增大后减小;抗扭承载力随竖向荷载的增大而增大,随水平荷载的增大而减小;不同竖向荷载的作用下,水平和弯矩极限承载力基本呈线性相关。

Aiming at the combined bearing characteristics of the four-bucket jacket foundation of offshore wind turbine in sandy soil,the numerical simulation method is used to calculate the ultimate bearing capacity of the four-bucket jacket foundation under five different loads combinations.Taking the bucket diameter,bucket height,and bucket spacing of 15 m as the control group,changing the bucket height and suction bucket center distance,and the failure enrelopes were drawn.The results show that under the action of vertical load,the horizontal ultimate bearing capacity of the foundation increases first and then decreases.The torsional bearing capacity of the foundation also increases with the increase of the vertical load and decreases with the increase of the horizontal load.Under the action of different vertical loads,the horizontal and moment ultimate bearing capacity are basically linearly related.