Temperature Effect on Bond Behavior of Carbon Fiber Reinforced Polymer to Concrete Interface

Abstract:

In order to study the effect of ambient temperature on bond behavior of Carbon Fiber Reinforced Polymer (CFRP)toconcrete joints at high temperatures, structural adhesives with different curing schedules were tested at different temperatures, and the shear performances of adhesive were investigated in the aspects of strength and stiffness. It was concluded that the glass transition temperature of the adhesive plays an important role for the bond behavior at high temperatures. When the temperature was near the glass transition temperature, bond behavior of structural adhesive has suffered a serious drop. Further, based on the bondslip relationship of FRP to concrete bonded joints at normal temperature, a simple calculation method was brought to derive the twoparameter bondslip relationship at high temperature. Considering the effect of glass transition temperature, normalized relational models for bond strength, the ultimate load and initial stiffness at high temperature are presented.