Failure Mode Analysis of Reinforced Concrete Beams Using GFRP Sheet as Shear Strengthening

Abstract

Abstract Corrosion is an electrochemical reaction that can cause deterioration to the reinforcing steel which has implications for the decrease in the flexural capacity of the beam. The use of corrosion resistant GFRP bar as a substitute for conventional reinforcement and GFRP sheets as a substitute for shear reinforcement without a concrete cover can increase the flexural capacity of RC beams. This study aims to analyze the flexural capacity and failure mode of reinforced concrete beams with GFRP bar and GFRP sheet, with variations in width of 50 mm (BFGS50) and 100 mm (BFGS100). Conventional RC beams (BK) and beams with GFRP bars as tensile reinforcement and conventional shear reinforcement (BFSB) were made as control beams. The beam is given a static-monotonic load until failure. The results showed that the flexural capacity of the BFGS50 and BFGS100 beams was higher than the control beam (BK and BFSB). From the failure mode analysis, the control beam experienced compression failure, while BFGS50 and BFGS100 experienced shear failure.

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