DOI: 10.5176/2251-3701_2.2.77
Authors: Muhammad Imran, Nasir Shafiq and Ibrisam Akbar
Abstract:
strengthening of reinforced concrete (RC) beam using Fibre Reinforced Polymer (FRP) revealed as the most efficient material due to its various mechanical properties. The previous experimental studies conducted to discuss strengthening schemes for RC beam, based on the observed crack pattern and failure mechanism for strengthening RC beam. The development of crack formation on RC beams under loading identifies the mode of failure and strengthening scheme required, such as to increase the flexural capacity of RC beam; FRP is applied at the tension zone. Similarly, for shear and torsion strengthening FRP wraps are being applied at the faces of the beam. The studies have shown the high strength in shear and torsion is achieved by applying U-shape wrap. Full warp gives high strength in torsion strengthening but practically the application of full wrap on RC beam is impossible and required more in-depth study to propose practical solutions. However, the combined effects of flexure, shear and torsion have not been discussed yet. Therefore, the strengthening schemes from literature are combined to propose new strengthening scheme for RC beam under combine the action of flexure, shear and torsion. However, experimental data are required to validate the proposed scheme.
Keywords: Crack, Flexure, FRP, Reinforced Concrete Beam, Strengthening, Shear, Torsion
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