Abstract
The enhancement of 2D model for the diffusion of chloride ions into reinforced concrete considering the time-dependent diffusion coefficient is discussed in the article. The non-stationary Finite Element Model is based on the four-node isoparametric element. The algorithm is implemented in MatLab compatible environment and an important part of source code is presented. The results of Finite Element Analysis are compared with the results of 2D analytical diffusion model.
Highlights
One of the most significant problems in case of many bridge decks in Czech republic is the corrosion of reinforcing steel because of the ingress of chloride salts applied to melt snow and ice [1,2,3,4]
The chloride ions penetration process is dominantly governed by diffusion in case of bridge decks
The article deals with the improvement of the finite element model (FEM) 2D chloride diffusion model
Summary
One of the most significant problems in case of many bridge decks in Czech republic is the corrosion of reinforcing steel because of the ingress of chloride salts applied to melt snow and ice [1,2,3,4]. The introduced model considers the chloride diffusion, which in some cases may be a major source of deteriorations in the concrete structures. Similar elements are used for solving problems of statics and dynamics, or heat [10, 11], but so far they have not been introduced for the process of diffusion of chloride ions in concrete. The combination with nonlinear calculation is a suitable tool for the possible occurrence of corrosion of the reinforcement in the concrete structure
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