Rock joints exhibit hysteresis shearing behavior and produce energy dissipation under shear cyclic loads, which however cannot be accurately depicted by existing constitutive models. This paper establishes a constitutive model for hysteresis shearing and associated energy dissipation of rock joints. Analytical expressions of the model during cyclic shearing processes are derived. Derivation of the model indicates no energy dissipation in the elastic stage. When the shear load exceeds elastic boundary, nonlinear energy dissipation takes place. Validations with experiments show that the proposed model provides good conformities with direct shear curves and hysteresis loops, and can predict the energy dissipation characteristics of rock joints under different working conditions. Compared to the constitutive models using Weibull’s distribution, the proposed one is smooth at the elastic boundary and can accurately capture the maximum shear stress. Unlike the existing incremental-type models, the proposed one provides clear and direct analytical expressions for both shear stress and energy dissipation during the whole displacement domain, which is more convenient in application.

岩石节理在剪切循环载荷下表现出滞后剪切行为并产生能量耗散，但现有的本构模型无法准确描述。本文建立了岩石节理滞回剪切及相关能量耗散的本构模型。推导出循环剪切过程中模型的解析表达式。模型的推导表明在弹性阶段没有能量耗散。当剪切载荷超过弹性边界时，会发生非线性能量耗散。实验验证表明，该模型与直剪曲线和磁滞回线具有良好的一致性，可以预测不同工况下岩石节理的耗能特性。与使用 Weibull 分布的本构模型相比，所提出的一种在弹性边界处是光滑的，并且可以准确地捕获最大剪切应力。与现有的增量式模型不同，该模型对整个位移域的剪应力和能量耗散提供了清晰直接的解析表达式，应用更加方便。