Investigate the flexural strength behavior of concrete beams reinforced with glass fiber-reinforced polymer under elevated in-service temperature

Abstract

    This research investigates the flexural strength behavior of concrete beams reinforced with glass fiber-reinforced polymer under elevated in-service temperatures. The primary objective is to investigate the potential of GFRP as an alternative material to replace traditional steel reinforcement in high-temperature environments.  Concrete beams with a compressive strength of 30 MPa at 28 days were designed with two types of reinforcement i.e. GFRP and steel rebars. Flexural tests were conducted at temperatures of 90, 120, and 150 degrees Celsius. The results indicated that GFRP-reinforced concrete beams exhibited increased deflection and reduced load-carrying capacity with increasing temperature, which was consistent with the behavior of composite materials under elevated in-service temperatures. This study highlights the potential of GFRP as a reinforcement material for concrete structures under elevated in-service temperatures.