Effect of transverse pressure on bond between ribbed bars and HSC after elevated temperatures

Abstract:

Cube specimens and special bond damage specimens were designed and cast with C100 high-strength concrete (HSC). Residual compressive strength of concrete cubes as well as bond strength based on damage testing were examined after being exposed to 200℃, 300℃, 400℃, 600℃ and 800℃, and the relationship between transverse pressure and bond strength was analyzed. Furthermore, the detailed investigations were carried out on the appearance characteristics of specimens and degradation for mechanism of bond strength, which could provide technical support and theoretical basis for both evaluating or strengthening and repairing the concrete structure after fire.