ABSTRACT
Stirrups confinement was long recognized to have positive effect on bond strength. However, the effects of stirrup corrosion on bond performance were still lack of studies. This paper investigated the degradation of bond performance between rebar and concrete due to stirrup corrosion. 20 specimens with stirrup corrosion levels targeted from 0 to 20% were designed and manufactured. The specimen was cast as a 200mm concrete cube, and an 18mm diameter steel rebar was centrally embedded with two stirrups around the rebar. The 8mm diameter transverse stirrups were artificially corroded by impressed current techniques to desired level of corrosion with the rebar intact. The effects of stirrup corrosion on crack opening width and length, bond strength and corresponding slip value, energy dissipation and slope of initial bond slip curve, and Residual bond stress were discussed in detail. The mean value and coefficient of variance of these parameters were derived.
