The effect of bond length on the flexural behavior of RC beam strengthened with NSM CFRP Bar

Near Surface Mounted (NSM) reinforcement is becoming a viable material for strengthening existing concrete structures in flexure. This paper presents the test results of 4 concrete beams strengthened with different bond length NSM bar. The ultimate load bearing capacity increases 15.17%, 26.74%, 65.42% according to the bond length compared to the control beam. The stiffness and crack restrict can improve with the bond length. The failure mode is the concrete cover debonding where as the resin, CFRP bar and the compressive concrete remain intact.