Flexural behavior of concrete beams reinforced with hybridization steel rebar enclosed by CFRP sheet has been explored in this paper. Seven specimens have been casted and tested under two-point load, one served as a control beam which was reinforced by ordinary steel bars, and six beams were reinforced with hybrid steel bar/sheet CFRP. Two main parameters have been considered which were the length of the hybrid steel bar/sheet CFRP and layers of carbon sheet warping steel bar. The response has been investigated in terms of failure modes, ultimate load, first cracking load, maximum deflection, crack patterns, load-deflection curves. The experimental results indicated that hybrid steel bar/sheet CFRP techniques yielded the same behavior as the control beams and reduced the maximum deflection. Also, it is improved the load capacity by about (4.35% to 42.61%) in comparison with reference beam. Effective reduction of maximum deflection was indicated throughout behavior of all enhanced specimens while no change was recorded in first cracking load in comparison with control specimen. Hybridization length (1200 mm) which represent two-thirds of beam length gives an optimal length of strengthening for one and two layers in terms of ultimate load by 21.74% and 39.13% compared to control beam, respectively.

本文探讨了用碳纤维布包裹的混合钢筋加固的混凝土梁的抗弯性能。7个试件在两点荷载下进行浇铸和试验，一个作为控制梁，用普通钢筋加固，6个梁用混合钢筋/薄板CFRP加固。考虑了两个主要参数，即混合钢筋/板 CFRP 的长度和碳板翘曲钢筋的层数。已经根据失效模式、极限载荷、第一次开裂载荷、最大挠度、裂纹模式、载荷-挠度曲线研究了响应。实验结果表明，混合钢筋/薄板 CFRP 技术产生与控制梁相同的行为，并减少了最大挠度。此外，负载能力提高了约 (4. 35% 至 42.61%）与参考光束相比。在所有增强试样的整个行为中都表明最大挠度的有效降低，而与对照试样相比，第一次开裂载荷没有记录到变化。与控制梁相比，代表梁长度三分之二的混合长度（1200 毫米）在极限载荷方面为一层和两层提供了最佳加强长度，分别为 21.74% 和 39.13%。