基于岩石细观结构的非均匀性,建立了冻融受荷岩石损伤扩展本构关系,通过冻融损伤、受荷损伤与总损伤3个损伤因子描述岩石材料各层次的劣化程度及损伤演化途径。通过与岩石冻融循环力学特性试验结果对比,证明所建立的模型能够很好地反映不同冻融循环次数下岩石应力应变的变化关系。 Based on the heterogeneity of rock meso-structure, the damage-expansion constitutive relation of rock mass subjected to freeze-thaw stress was established. Three damage factors, namely freeze-thaw damage, load-bearing damage and total damage, were used to describe the degradation degree and damage evolution path of rock material . By comparing with the experimental results of rock freezing and thawing cycles, it is proved that the model can well reflect the change of rock stress-strain under different freeze-thaw cycles.