Realistic Bond Strength of FRP Rebars in NSC from Beam Specimens

摘要

This study concerns the interfacial bond strength between FRP rebar and normal strength concrete (NSC) Three different types of rebars were tested using the beam specimens carbon (CFRP); glass (GFRP), and steel This involved a total of 26 beam specimens containing 10-, 16-, and 19-mm rebars The test embedment lengths were 10, 15 and 20 times the rebar diameter (d_b) For each rebar tested, the results concern load deflection curves, bond stress-slip constitutive relationships and the mode of failure For evaluation purposes, the test results from a previous study on pullout specimens by the authors are also included Based on these results, a proposal for the average bond strength of straight FRP rebars under tension in NSC is made.