群桩基础厚承台受力特性研究

Study on the Force Characteristics of Thick Caps in Pile Group Foundation

为了确定群桩基础中承台的受力特性,结合工程实例,采用ANSYS有限元分析软件建模后开展实体有限元数据分析,同时与本研究构建的简化版空间拉压杆模型进行对比分析,研究了承台结构使用不同的分析模型计算受力情况的结果。结果表明:采用本研究中简化的拉压杆模型应力分布与实体有限元结果吻合良好,模型计算理论构型简单,计算简便,符合转体桥群桩基础承台受力的特点。

In order to determine the force characteristics of cushion cap in pile group foundation,combined with engineering examples,finite element analysis software ANSYS was used for solid finite element analysis. At the same time, a simplified spatial strut-and-tie model was used for comparative analysis, the results of calculating the stress of cap structure with different analysis models are studied.The results indicate that the stressdistributionof simplified strut-and-tie model is in good agreement with the solid finite element analysis,and the theoretical configuration of the model is simple and easier calculation, more importantly,it accords with the stress characteristics of rotating construction bridge.