Abstract
The influence of steel reinforcement corrosion on both the bond strength between steel reinforcement and concrete and the mechanical properties of steel reinforcement has been a subject of continuous investigation, with significant implications for the durability and failure of reinforced concrete (RC) structures. This paper introduces Cohesive elements between the steel reinforcement and concrete to propose a new method to present their bond–slip behavior. Then, this paper focuses on corroded RC beams and establishes refined finite element (FE) models that effectively captures the degradation of steel reinforcement due to corrosion. the effects of longitudinal reinforcement and stirrups with different corrosion extents on the degradation of the mechanical behavior of RC beams are discussed in detail. Comparative analyses of the flexural and shear load-carrying capacities between the FE models and experimental models are conducted. The results illustrate that the FE models established by the proposed method in this paper accurately reflects the load-carrying capacity of RC beams affected by corrosion. The corrosion of steel reinforcement has a great influence on the failure mechanisms of RC beams. As the stirrup corrosion extent increased, the RC beam gradually changed to brittle failure.
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