考虑黏土应变软化的拖曳锚极限承载力数值分析

摘要

In this paper,a large deformation finite analysis is carried out to investigate the ultimate bearing capacity of the drag anchor using ABAQUS/CEL and the calculated results are in good agreement with the existing research results.The softening model is realized by user subroutine VUSDFLD and the influence of clay strain softening on ultimate bearing capacity of drag anchor is studied by changing different softening parameters.It is found that the peak bearing capacity of drag anchor is almost independent of the strain softening of clay,but the residual bearing capacity is greatly affected by strain softening.%基于ABAQUS有限元分析软件,采用耦合的欧拉-拉格朗日方法建立三维有限元模型,计算拖曳锚极限承载力,计算结果与已有研究结果吻合较好;通过用户子程序VUSDFLD来实现软化模型,通过改变不同的软化参数,研究了黏土应变软化对拖曳锚极限承载力的影响.研究发现拖曳锚峰值承载力几乎不受黏土应变软化的影响,但是其残余承载力受应变软化影响较大.