Reinforced concrete (RC) in aggressive environments has higher concrete clear cover provided to protect the reinforcement against corrosion. However, providing such higher cover in severe environments could result in increased crack widths for the structural member. Hence, using a combination of fibre-reinforced polymer (FRP) bars and steel reinforcement bars (hybrid reinforcement) has been considered as a suitable solution to develop the full flexural capacity of the section without significantly affecting the serviceability and ductility requirements. This includes utilising the non-corrodible nature of FRP by adding a layer of longitudinal reinforcement made of FRP bars at the corner areas of the cross-section and keeping the main steel reinforcement at sufficient cover depth. This paper studies the flexural behaviour of hybrid glass-fibre-reinforced polymer (GFRP) beams consisting of continuous GFRP bars along with conventional steel reinforcement and comparing them with conventional RC beams through experimental and analytical studies. The test results indicated that the hybrid GFRP beams possess better flexural strength and ductility compared to conventional RC beams and could be considered as a suitable alternative to replace RC beams in aggressive environments.

中文翻译：

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在侵蚀性环境中用 GFRP 加固代替 RC 梁的弯曲行为

腐蚀性环境中的钢筋混凝土 (RC) 具有更高的混凝土透明覆盖层，以保护钢筋免受腐蚀。然而，在恶劣的环境中提供这种更高的覆盖可能会导致结构构件的裂缝宽度增加。因此，使用纤维增强聚合物 (FRP) 钢筋和钢筋钢筋（混合钢筋）的组合已被认为是一种合适的解决方案，可以在不显着影响适用性和延展性要求的情况下开发截面的全部抗弯能力。这包括通过在横截面的拐角区域添加一层由 FRP 钢筋制成的纵向钢筋并保持主钢筋具有足够的覆盖深度，从而利用 FRP 的抗腐蚀特性。本文研究了由连续 GFRP 钢筋和传统钢筋组成的混合玻璃纤维增​​强聚合物 (GFRP) 梁的弯曲行为，并通过实验和分析研究将它们与传统 RC 梁进行了比较。试验结果表明，与传统钢筋混凝土梁相比，混合 GFRP 梁具有更好的抗弯强度和延展性，可被视为在侵蚀性环境中替代钢筋混凝土梁的合适替代品。