Bond Performance of Ribbed Type of GFRP Rebar to Concrete at High Temperature

摘要

This study focuses on the bond performance of ribbed type of GFRP rebar to concrete at highrntemperature and discusses the results of pullout tests. Pullout tests of ribbed type of GFRP rebarsrnembedded in concrete are conducted to obtain an accurate bond stress-slip laws and also to closelyrnobserve the state of the surface of pulled-out rebars at failure to accurately categorize the mode ofrnfailure. The effect of temperature on the bond strength is Similar trends can be seen for all thernGFRP rebars; relatively high bond strength is seen at room temperature. As the internal temperaturernincrease to approximately 60～100℃, a reduction in the bond strength can be seen.