Mesoscale simulation program with 2-D RBSM was developed to investigate the bond degradation between concrete andreinforcement under the effect of frost damage. Following conclusions could be made according to the research grogram:(1) Frost action has obvious effect on bond properties between concrete and reinforcement. That is, with increasing number ofFTC, the bond stiffness and bond strength would decrease whereas the slip at peak bond stress increase. Similar tendencycould also be found in several experimental results.(2) After frost damage, the intercostal concrete would have a smaller strength and stiffness but better ductility, which accountsfor the decreasing of bond strength but increasing of peak slip. Besides, diagonal cracks would take place in concrete afterFTCs which would also result in the smaller value of bond strength.
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