Effect of beam size and FRP thickness on interfacial shear stress concentration and failure mode of FRP-strengthened beams

Two main conclusions are drawn from this study. First, the increase in beam size and/or FRP thickness is found to increase the interfacial shear stresses in the FRP curtailment region. In the present study, however, the peak shear stresses are not high enough to cause a change in the failure mode of the beams. Second, the size of the beam does not seem to affect the extent (measured in term of a strengthening ratio, SR) to which a reinforced concrete beam can be strengthened.