基于双屈服条件准则的横观各向同性本构模型研究及其数值模拟

A study of transverse isotropy model based on double yield conditions and its numerical simulation

为研究层状岩体的力学特性,提出基于双屈服条件强度准则的本构模型。基于双屈服条件强度准则,联合横观各向同性的广义虎克定律刚度矩阵建立考虑横观各向同性的本构模型,并结合岩石单轴压缩试验数据,通过最小二乘法拟合该模型的参数;实现该模型的单轴压缩试验数值模拟,并通过室内单轴压缩试验结果对数值模拟结果进行验证,分析模型的可靠性。研究结果表明:本文提出的本构模型在层状岩体的力学分析方面具有适用性,为层状岩体力学特性研究及层状岩质边坡的稳定性分析奠定了基础。

In order to study the mechanical properties of stratified rock mass,a constitutive model based on the strength criterion of double yield condition is proposed.Based on the strength criterion of double yield condition, the constitutive model considering transverse isotropy was established by combining the generalized Hooke's law stiffness matrix.The numerical simulation of the model was carried out,and the numerical simulation results were verified by the results of the laboratory test and the reliability of the model was analyzed.The results show that the constitutive model presented in this paper is applicable to the mechanical analysis of stratified rock mass and provides a foundation for the study of the mechanical characteristics of stratified rock mass and the stability analysis of stratified rock slope.