Shear Strengthening of RC Deep Beams with Symmetrically or Asymmetrically Positioned Square Openings Using CFRP Composites and Steel Protective Frames

In most cases, openings are made in the Web of deep beams for installations to pass through. These members require be strengthened since reduce load-bearing capacity. This study utilizes carbon fiber-reinforced polymer (CFRP) composites and steel protective frames (SPF) as strengthening configurations reinforced concrete (RC) improve strength lost due square openings. To this end, eleven specimens with 10 × 50 120 cm size were subjected three-point monotonic loading. each beam, one or two 18 side positioned either symmetrically asymmetrically along beam before it is CFRP SPFs. The installed using externally bonded reinforcement (EBR) on grooves (EBROG) techniques wrapped inclined configurations. obtained results indicate that retrofitted by SPF exhibited a superior performance their loading capacity energy absorption enhanced 115% 337% comparison reference respectively, while these values EBROG technique 58% 182%, 42% 105% those EBR technique.