ABSTRACT
Structural durability deterioration is a multiscale and multiphysics process and can be influenced by different factors. The influences of constructions initial status and the multiscale variation of concrete are also critical for the unexpected durability deterioration. Benefited from the development in concrete modeling, the progress in the shrinkage and durability are also prominent at meso-scale. In this paper, a comprehensive method is proposed combining the refined mesoscopic chloride ingress and the multiphysics shrinkage model. To investigate the influence of early-age shrinkage quantitatively, the numerical comparison between the 100-year chloride ingress with and without the shrinkage effect is conducted. With the modified diffusion coefficient, the ion concentration and the frontal depths of chloride ingress are all increased greatly. The extreme concentration under the 30mm concrete cover increases from 0.04kg/m3 to 0.5kg/m3. The influence of different relative humidities in early-age curing is also investigated. With the drier curing environment, local tensile stress also increases greatly around the exposed surface, and the influenced area of chloride ingress is lager.
