Experimental and numerical investigations on the performance evaluation of shear deficient and GFRP strengthened reinforced concrete beams

Based on the parametric studies, the schemes which provide optimum improvement in performance for strengthening of the shear deficient beams are identified. For all three classes of deficient beams, greatest improvement in strength is attained for 45° orientation in single ply, 45°-90° orientation in double ply and 90°-45°-90° orientation in triple ply strengthening schemes. In all GFRP strengthened beams, mode of failure changed from shear to flexural failure and showed great improvement in the ductile behavior.