考虑黏土应变软化的拖曳锚极限承载力数值分析  

Numerical Analysis of Drag Anchor Bearing Capacity in Clay Considering Soil Strain Softening

作　　者：窦玉喆 于龙[1,2] DOU Yuzhe;YU Long(School of Hydraulic Engineering, Dalian University of technology, Dalian, Liaoning 116024, China;State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China)

机构地区：[1]大连理工大学水利工程学院,辽宁大连116024 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《水利与建筑工程学报》2018年第1期168-173,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金项目(51539008;51639002;51679038)

摘　　要：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。In this paper,a large defomiation 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.

关 键 词：拖曳锚 黏土 极限承载力 应变软化 流动机制 耦合的欧拉-拉格朗日法 

分 类 号：TU447[建筑科学—岩土工程]