Probabilistic bond strength prediction between the corroded reinforcing bars and concrete considering the concrete strength and non-uniform corrosion

The bond strength considering concrete strength and non-uniformly corrosion was tested by twelve beam-type specimens, and the corrosion was characterized by the 3D scanner. According to the K-S test, the cross-sectional area of the corroded bar follows the lognormal distribution at the 5% significance level, where its mean and standard deviation linearly correlate with the mass loss rate. The probabilistic bond strength is pre-dicted by the Monte-Carlo method, incorporating the uncertainties of the cross-sectional area of rebars and the concrete strength. It is indicated that the failure probability can be decreased by decreasing mass loss rate and increasing concrete strength.