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在现行本构模型研究的基础上,建立了一种全新本构模型,它可以描述4种行为特征:弹性-弹塑性-软化、弹性-弹塑性-硬化、理想弹塑性、弹脆性;其模型参数只有4个,现行模型只是该模型的特例(如:邓肯-张模型),介绍了模型参数的决定方法,其决定的依据是:模型所描述的行为特征与实测数据之间相关度最优;分析了岩土体破坏后区特征,提出岩土体破坏后区行为可以定义为视应力-视应变特征。并以实例对该模型进行了说明,结果表明,该模型可以描述岩土体的行为特征,并对虚内键模型、弹簧模型和离散单元法等具有借鉴作用。
Based on the existing constitutive model, a new constitutive model is established, which can describe four kinds of behavioral characteristics: elastic - elastoplastic - softened, elastic - elastoplastic - hardened, ideal elastic and elastic, The parameter is only four, and the current model is only a special case of the model (such as Duncan-Zhang model). The decision method of the model parameters is introduced. The decision is based on the optimal correlation between the behavioral characteristics described by the model and the measured data The characteristics of post-damage area of rock mass are analyzed, and the behavior of the area after the failure of rock-soil mass can be defined as the visual stress-visual strain. An example is given to illustrate the model. The results show that the model can describe the behavior characteristics of rock and soil, and can be used for reference to virtual internal key model, spring model and discrete element method.