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首页> 外文期刊>Materials & design >Reinforced concrete beams strengthened with carbon fiber reinforced polymer by friction hybrid bond technique: Experimental investigation
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Reinforced concrete beams strengthened with carbon fiber reinforced polymer by friction hybrid bond technique: Experimental investigation

机译：碳纤维增强聚合物摩擦混合粘结技术加固混凝土梁的试验研究

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摘要

Carbon fiber reinforced polymer (CFRP) can be used to strengthen the reinforced concrete (RC) beams. But premature debonding is the main failure model in ordinary bond technique, and the strengthening effect is limited. In order to improve bonding and restricting sliding displacement, Friction Hybrid Bonded FRP Technique (FHB-FRP) is developed. Six simple-span RC specimen beams with different strengthened methods were tested in four-point bending. The experiment results indicate that FRP debonding can be effectively prevented by the FHB-FRP strengthened beam. The ultimate load-carrying capacity of the specimen strengthened by FHB-FRP technique is able to increase by a factor of 2.13 times compared with the beam strengthened with ordinary bond technique (U-jacketing technique). In addition, the cracking and yielding loads are improved more significantly by FHB-FRP technique than U-jacketing technique. Specimens strengthened with FHB-FRP technique have cracks with a more limited distribution and width. Finally, the finite element method (FEM) is conducted to simulate the behavior of the test specimens. The results obtained from the finite element method are compared with experiment. Excellent agreements have been achieved in the comparison of results.
机译：碳纤维增强聚合物（CFRP）可用于增强钢筋混凝土（RC）梁。但是，过早的脱胶是普通粘结技术的主要失效模式，其强化效果有限。为了改善粘结并限制滑动位移，开发了摩擦混合粘结FRP技术（FHB-FRP）。在四点弯曲中测试了六种不同加固方法的简单跨度RC试样梁。实验结果表明，FHB-FRP加强梁可以有效地防止FRP脱胶。通过FHB-FRP技术增强的试样的极限承载能力与通过普通粘结技术（U形护套技术）增强的梁相比，可以提高2.13倍。此外，与U形夹套技术相比，FHB-FRP技术可显着改善裂纹和屈服载荷。用FHB-FRP技术加固的试样的裂纹分布和宽度更加有限。最后，进行了有限元方法（FEM）来模拟试样的行为。将有限元方法获得的结果与实验进行比较。在比较结果方面已经达成了极好的协议。

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