EXPERIMENTAL STUDY ON THE BOND BETWEEN GFRP BARS AND CONCRETE WITH DIFFERENT POSITION

The pullout tests of concrete reinforced with GFRP bars were carried out and test data were analyzed and summed up.Distribution curves of the strains of GFRP rods with loads and at different position were showed,the characteristics of the two types of curve were discussed.Distributions of the bond stress between GFRP bars and concrete and slip at different position were studied.The experimental results show that the bond-stress law of GFRP bars and concrete is obviously different from that of the reinforced concrete because of the self-characteristics of GFRP bars.A good agreement is obtained between the results of slip fitted formula at bond length range and experimental results.