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本文应用内时理论和损伤力学建立了碾压混凝土压剪及压压剪状态下的内时损伤本构模型。其特点是：混凝土的弹塑性特性由内时理论描述，而破坏由损伤力学来描述。前者使本构模型摆脱了一般弹塑性中屈服面的概念，从而简化了非线性计算过程；后者使微裂纹引起的软化、体积膨胀等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。应用本文建议的模型分析碾压混凝土压剪及压压剪状态剪应力－应变关系，所得计算结果与试验数据相符合，可作为碾压混凝土重力及拱坝设计的依据。
In this paper, the inner-time damage constitutive model of RCC under compression, shear and compression is established by using the inner-time theory and damage mechanics. Its characteristics are: the elasto-plastic properties of concrete are described by the inner-time theory, while the damage is described by the damage mechanics. The former makes the constitutive model get rid of the concept of yield surface in general elastoplasticity, which simplifies the nonlinear calculation process; the latter makes the microcracks caused by the softening, volume expansion, etc. can be considered by the damage variable; thus reflecting the nature of the concrete The characteristics, in turn, greatly reduce the parameters and basic equations of the model. The model proposed in this paper is used to analyze the stress-strain relationship between the RCC shear and the compressive shear, and the calculated results are in agreement with the experimental data. It can be used as the basis for the RCC gravity and arch dam design.