混凝土内时损伤本构模型

应用内时理论和损伤力学建立了混凝土内时损伤本构模型。该模型的特点是：混凝土的弹塑性特性由内时理论描述，而微裂缝由损伤力学来描述。前者使本构模型摆脱了一般弹塑性模型中的屈服面的概念，从而简化了非线性计算过程；后者使微裂缝引起的软化、休积膨胀等效应都可由损伤变量来考虑，从而既反映了混凝土的本质特性，又使模型的参数和基本方程大大减少。应用本文建议的本构模型于各种实例分析中，所得计算结果与试验结果符合较好。

Endochronic Damage Constitutive Model for Concrete

An endochronic damage constitutive model is proposed. The characteristics of the model are that the elasto-plastic properties and the internal defectmicrocrack of concrete are described by endochronic theory and damage mechanics respectively, so that the concept of the yield surface is not needed; parameters of the model are reduced and it is easy and simple to be practically used in the engineering. The proposed model is used to analyze deformation and strength of concrete specimens and slabs. The analysing result shows that a good agreement is achieved between the calculated values based on the proposed model and experimental data.