Evaluation of bond performance of corroded steel bars in concrete after high temperature exposure

•Bond performance between corroded steel bars and concrete after high temperature exposure were investigated.•Slight reinforcement corrosion could delay the bond behavior degradation caused by the elevated temperatures.•The corrosion-induced cracks reduced the confinement of concrete cover and accelerated the deterioration of bond behavior.•A bond-slip constitutive equation between corroded rebar and concrete after high temperature was proposed.