experimental study of shear-deficient rc beam wrapped with gfrp

In this study, two types of shear-deficient beams having different stirrup spacing (150 mm c/c and 300 mm c/c) were used. the performances of shear-deficient beam strengthened with externally and internally wrapped gfrp were tested under three-point bending monotonic loading. the load-carrying capacity of gfrp-wrapped beam was found to be significantly increased in comparison to the unstrengthened (control) beam and was the highest in both externally and internally bonded shear-deficient beams, i.e., 39.60% and 45.3%, respectively. significant increment was also observed in flexural ductility, energy absorption and inelastic performance of the strengthened beams. the performance of the externally gfrp-wrapped rc beam (gfrp–epoxy-bonded rc beam) was better than that of the internally wrapped beam. however, because of the low economy index, internal wrapping is more suitable as a strengthening technique than external wrapping.