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在归纳整理连续介质的材料力学性质的基础上,引出土体本构关系的两种描述框架,即弹塑性理论和亚塑性理论,并对其相互关系进行了分析,指出亚塑性理论适宜用来构建土体的本构模型,并提出了一种基于亚塑性理论的建立土体各向异性本构模型的新途径,该途径通过将一各向异性破坏准则嵌入亚塑性模型来确定各向异性参数,有别于以往通过拟合实验数据来确定各向异性参数的方法。该途径为目前各种分析平台提供了一种考虑主应力轴旋转效应的可能。
On the basis of inducing and sorting the mechanical properties of continuous media, two kinds of description frameworks of constitutive relations of soil, that is, elasto-plastic theory and sub-plasticity theory, are derived and their mutual relations are analyzed. It is pointed out that the theory of plasticity is suitable The constitutive model of soil is established and a new way of constructing anisotropic constitutive model of soil is proposed based on the theory of sub-plasticity. This approach determines the anisotropy by fitting an anisotropic damage criterion into the sub-plasticity model Parameters, different from the past by fitting the experimental data to determine the anisotropic parameters. This approach provides a possibility for various analysis platforms to consider the effect of principal stress axis rotation.