Evaluation of Flexural Behavior and Service Condition of GFRP and CFRP Hybrid Reinforced Concrete Beams | ||
| Aswan University Journal of Sciences and Technology | ||
| Volume 3, Issue 1, June 2023, Pages 141-153 PDF (1.03 M) | ||
| Document Type: Original papers | ||
| DOI: 10.21608/aujst.2023.312913 | ||
| Author | ||
| mohaseb ahmed | ||
| Faculty of Engineering, Al-Azhar University, Department of Civil Engineering | ||
| Abstract | ||
| Through theoretical and experimental research this study investigates the flexural behaviour of hybrid bar-reinforced concrete beams under static load. The dimensions of each beam are 150 x 250 x 2036 mm. All of the examined beams underwent four-point loading testing. Steel has been replaced by fibre-reinforced polymer (FRP) bars for RC elements exposed to those environments. Many experts have focused their emphasis on conducting numerous studies on various types of FRP products due to its non-corrosive nature. Numerous standards have also been developed as a result of extensive investigation. In this context, a novel FRP material combination is investigated in this study, and its properties are derived. In this study, carbon and glass fibres combine to create a novel hybrid rebar. Alternative solutions, such as using a hybrid reinforcement (CFRP rods and GFRP bars) as a principal reinforcement, have been suggested as a way to enhance the structural performance of GFRP reinforced concrete members. Even stronger than steel in terms of tensile strength and elastic modulus is carbon fibre. These are benefits of employing carbon fibre from a structural perspective, but not from an economic one because of how much more expensive it is than glass fibre. To address the inadequacies of the FRP rebar, the idea of "hybridization" was developed. FRP bars' mechanical characteristics can allow for significant deflections and crack widths. As a result, the serviceability limit states are frequently used to guide the design of concrete elements reinforced with FRP materials (SLS). The study's primary factors include the reinforcement ratio, and the hybridization ratio of CFRP to GFRP (CFRP / (CFRP +GFRP)). Deformations of the reinforcement and concrete, as well as crack width and spacing, are measured and studied. The experimental findings are presented and contrasted with some of the most accurate deflection and cracking prediction models for steel and FRP RC. In this study, there was an improvement in the elasticity parameters by 87%, an improvement in tensile strength by 11.6%, and an improvement by 63% in the elongation ratio. | ||
| Keywords | ||
| hybridization; flexural; serviceability; elastic modulus; higher tensile strength | ||
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