INNOVATIVE TORSIONAL STRENGTHENING OF RC T-BEAMS USING NSM FRP ROPES

Abstract

This study addresses the critical need for effective torsional strengthening techniques in reinforced concrete (RC) structures, with a focus on T-beams. Existing methods, particularly those utilizing externally bonded fiber-reinforced polymer (FRP) composites, have been extensively studied for axial, bending, and shear loads, but torsional behavior remains a complex and underexplored area. The paper introduces a novel approach employing FRP ropes configured as closed stirrups, aiming to enhance torsional capacity while addressing practical challenges associated with conventional methods. Experimental investigations on T-shaped RC beams reveal promising results, demonstrating the effectiveness of FRP ropes in closed stirrup form. The findings not only contribute to a deeper understanding of this specific strengthening technique but also offer practical insights for designing and retrofitting RC structures susceptible to torsional loading. The study's outcomes have the potential to influence design practices, contribute to sustainable infrastructure development, and inform future guidelines for optimizing FRP strengthening strategies in T-beams.