Abstract

Modeling an accurate bond-slip model between concrete and reinforcement is a significant challenge in fiber reinforced polymer (FRP) strengthened reinforced concrete (RC). This paper presents a novel method for developing and validating an accurate bond-slip model. By employing a numerical procedure based on the finite difference method and a metaheuristic optimization algorithm, this method eliminates the need for a specific bond-slip law shape. This unique feature enables the prediction of bond-slip laws for various strengthening methods, including EBR and NSM, as demonstrated in this study. Furthermore, the methodology allows for the prediction of bond-slip laws associated with premature failure. The numerical and experimental results obtained confirm the accuracy of the methodology.

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