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The structural behavior of RC beams subjected to non-uniform steel bar corrosion is studied here by developing a simplified numerical approach. At first, a modeling methodology for the steel bar corrosion is presented. Then, 3D nonlinear finite element analysis is carried out to assess the residual structural performance of RC beams with non-uniform steel bar corrosion. Obtained results from the numerical study were verified with the experimental work. Six reinforced concrete beams with identical dimensions and reinforcement layout were tested under static loading. Out of the six beams, five beams were subjected to a different level of corrosion using an electrochemical method, and another beam was used as a control specimen without corrosion. Results from the experimental and numerical study demonstrated that nonuniform corrosion of steel bars led to a significant decrease in the load carrying capacity and ductility of the RC beams. Findings of this study will be useful in assessing the residual structural performance of the RC structures with non-uniform steel bar corrosion.

Finite element analysis of RC beams subjected to non-uniform corrosion of steel bars