Based on the mechanism of chloride subsiding with freezing-thawing damage,the major factors influencing durability and chloride permeation depth with freezing-thawing were analyzed and measured by tests.Aimed at chloride diffusion equation for pre-stressed structure,which considered freezing-thawing damage and time dependence of diffusion coefficients,the model of chloride diffusion for marine pre-stressed concrete structure in freezing-thawing and chloride damage was deduced,which was analyzed by numerical...