Frost damage is one of the most important deterioration factors for porous materials in cold and wet region. In this study, a mesoscale numerical study is conducted to estimate the frost damage of rock materials based on the Rigid Body Spring Method. The mesoscale elastoplastic constitutive law is presented cooperated with the ice formation model for the rock material. Then, the cyclic expansion of selected marble during multiple freeze-thaw cycles (FTC) is simulated, resulting in different values of residual strain. It is found that using the residual strain as a link between freezing process and mechanical degradation, the damaged compressive behaviors after different numbers of FTC can be successfully explained and reproduced, including the crack recovery phenomenon. The findings in this study are beneficial for the further simulation of frost deterioration history, considering the large variability in properties of rock material.

冻害是多孔材料在寒冷潮湿地区最重要的劣化因素之一。在这项研究中，进行了中尺度数值研究，以估计基于刚体弹簧法的岩石材料的冻害。结合岩石材料的冰形成模型，提出了中尺度弹塑性本构律。然后，模拟了选定大理石在多次冻融循环 (FTC) 期间的循环膨胀，从而产生不同的残余应变值。研究发现，利用残余应变作为冻结过程和机械退化之间的联系，可以成功地解释和再现不同 FTC 次数后的受损压缩行为，包括裂纹恢复现象。