Modeling Residual Flexural Strength of Corroded Reinforced Concrete Beams

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This paper presents a new analytical method for evaluating concrete crack development, estimating rebar bond strength degradation and predicting residual flexural strength of concrete beams affected by reinforcement corrosion.First, cracking development in cover concrete due to reinforcement corrosion is investigated by using the rebar-concrete model where realistic concrete properties such as bilinear tension softening law for the cracked concrete are considered.Then, the bond strength evolution of the corroded rebar is evaluated by considering the contributions from adhesion, concrete confinement and corrosion pressure acting at the bond interface.