基于摩尔-库仑准则的膨胀土弹塑性本构模型及其数值实现  

Expansive soil elastic-plastic constitutive model based on Mohr Coulomb criterion and its numerical implementation

作　　者：李朝阳[1] 谢强[1] 康景文 赵梦怡 郭永春[1] 

机构地区：[1]西南交通大学地球科学与环境工程学学院,成都610031 [2]中建西南勘察设计研究院有限公司,成都610000

出　　处：《土木建筑与环境工程》2017年第2期92-99,共8页Journal of Civil,Architectural & Environment Engineering

基　　金：中建股份科技研发课题(CSCEC-2014-Z-48)~~

摘　　要：膨胀土的应力应变关系与含水量的变化有关,通过室内试验对膨胀土的变形、强度以及膨胀参数与含水量之间的关系进行研究,以湿度应力场理论为基础,提出了一个具有工程实用价值的基于摩尔库仑准则的膨胀土弹塑性本构模型。依据FLAC3D数值模拟软件所提供的二次开发程序,给出了该膨胀土弹塑性本构模型二次开发程序过程的基本原理以及模型的程序框图。结合渗流软件计算的湿度场分布,进行膨胀土基坑边坡实例验算,验证了该本构模型的正确性。The stress-strain relationship for expansive soil is associated with water content changing. Through the laboratory test of the relationship between the deformation, strength, expansion parameters of the expansive soil and the water content, a expansive soil elastic-plastic constitutive model based on Mohr Coulomb criterion which has engineering practical value is proposed according to the humidity stress field theory. In accordance with fundamental code-run-principle of FLAC3D software, the basic principle of the secondary development program and detailed analysis combined with the expansive soil elastic-plastic constitutive model are proposed. The correctness of the expansive soil constitutive model is verified through the demonstration calculation of an expansive soil slope, combined with the water content field calculated by Seepage software.

关 键 词：含水量 室内试验 湿度应力场 本构模型 二次开发 

分 类 号：TU47[建筑科学—结构工程]