Integrating non-metallic reinforcement, such as Fiber Reinforced Polymer (FRP) bars, into residential and commercial construction necessitates extensive research to the structural performance of FRP-reinforced concrete (RC) members under various conditions, including fire exposure. To address this, a comprehensive investigation was conducted on full-scale flexural FRP-RC members subjected to elevated temperatures. The experimental study involved fire resistance testing on beams, wherein the midsection (tension zone) was exposed to heating from below, as well as from the sides, while being simultaneously loaded with 50% of their ultimate loads. The beams were reinforced with Basalt Fiber Reinforced Polymer (BFRP) bars and a hybrid composite of Carbon and Basalt Fibers (HFRP) bars. Comparative analysis confirmed that the HFRP-RC beams exhibited superior resistance to the combined effects of loading and elevated temperatures when compared to the BFRP-RC beams. The increase in the concrete cover from 30mm to 60mm positively influenced the performance of FRP-RC beams, enabling them to endure the full 120-minute heating duration without failure and resulting in reduced deflections as observed in the current study.
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