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Abstract
The steel beams with crack and corrosion can result in the reduction of stiffness, load carrying capacity and hence it results in the worst performance of the beam. Previous research has looked on flexural rehabilitation of corroded steel beams utilizing Carbon Fibre Reinforced Polymer (CFRP) and Glass Fiber Reinforced Polymer (GFRP). However, no research has been done on the use of hybrid laminates and post tensioning to repair corroded steel beams. This study examined the feasibility and effectiveness of using hybrid laminates made with combining CFRP, BFRP and GFRP for rehabilitation of corroded and cracked steel beams. The steel beams examined are of with 10%, 20%, 40%, 50% and 75% corrosion and precrack at flexural and shear zone. These steel beam models compared with control beam model that is, steel beam having no crack and corrosion. Among these models, worst model was rehabilitated using hybrid laminates and post tensioning. Comparison of model retrofitted using CFRP, GFRP and BFRP with model retrofitted with hybrid laminates were also examined. Non-linear finite element models were developed by using ANSYS to assess structural performance of these beams. Three-point bending tests were used to analyses the beams with and without rehabilitation.