Prediction of corrosion initiation in reinforced concrete members subjected to environmental stressors: A finite‐element framework

To study the corrosion of reinforced concrete members subjected to various exposure conditions, a finite-element framework is developed. This framework evaluates the effects of the most critical parameters that may expedite or slow down the corrosion process. Some of these parameters, such as concrete properties and diffusion characteristics, are categorized as internal parameters. In contrast, the environmental parameters, such as ambient temperature, relative humidity, and concentration of carbon dioxide or chloride ions, are considered as external parameters. Using detailed three-dimensional finite-element models, the influential parameters are examined as individual physical environments. The analyses of these environments are based on the concept of transient thermal analysis with appropriate modifications. The novelty of the proposed framework is to consider the nonlinear time-dependent characteristics of the involved parameters along with their mutual interactions. This will result in a more realistic estimation of the extent of degradation over the service life of a structure.