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在混凝土结构中,碳纤维(FRP)成为钢筋加固的一种重要材料。FRP可大大改善碳纤维加强混凝土(FRPRC)梁的延性。为了提高梁的延性,同时也能保证FRP筋的高强度特性,建议采用纵向型钢以形成混合FRPRC梁。12根试件包括素混凝土梁、钢骨混凝土梁、纯FRPRC梁和混合FRPRC梁。试验结果表明:与纯FRPRC梁相比,混合FRPRC梁的延性更好;而且超配筋率高的FRPRC梁的延性更好。因此,配筋率可以提高FRPRC构件的延性,建议FRPRC构件设计首选超配筋率。
In concrete structures, carbon fiber (FRP) becomes an important material for steel reinforcement. FRP can greatly improve the ductility of carbon fiber reinforced concrete (FRPRC) beams. In order to improve the ductility of the beam and at the same time to ensure the high strength properties of the FRP bars, it is recommended to use longitudinal sections to form a hybrid FRPRC beam. The 12 specimens include plain concrete beams, steel reinforced concrete beams, pure FRPRC beams and hybrid FRPRC beams. The experimental results show that ductility of hybrid FRPRC beams is better than that of pure FRPRC beams, and the ductility of FRPRC beams with high reinforcement ratio is better. Therefore, the reinforcement ratio can improve the ductility of FRPRC components, it is recommended that the design of FRPRC members exceed the reinforcement ratio.