Intermediate crack (IC) debonding is a common failure mode of externally bonded (EB) FRP-strengthened RC beams. This debonding failure initiates at an intermediate crack and propagates towards a plate end. New epoxy anchor was proposed recently by the authors and has shown its effectiveness in enhancing interfacial bonding behaviour and therefore it might be effective to delay or suppress IC debonding failure in RC beams. This study is to experimentally investigate the efficiency of using epoxy anchors for mitigating the IC debonding under three-point bending tests. The application of the new proposed epoxy anchors has advantage of simple installation procedure including pre-drilling holes and then bonding FRP. Totally, five RC beams including one control specimen and four anchored ones were tested. Damage modes and structural response of unanchored and anchored RC beams were evaluated and discussed. The effects of various configurations of epoxy anchors were analysed and discussed. The experimental results show that the load-carrying capacity and the ductility of anchored beams increased by up to 13.12% and 53.31%, respectively, and the strain utilization of FRP can be significantly improved by 43.48% as compared to the control specimen.

中间裂纹（IC）脱胶是外部粘结（EB）FRP加固的RC梁的常见破坏模式。这种脱粘失效在中间裂纹处开始并向板端传播。作者最近提出了新的环氧锚，并已显示出其在增强界面粘结性能方面的有效性，因此对于延迟或抑制RC梁中的IC剥离失败可能有效。这项研究旨在通过实验研究在三点弯曲试验中使用环氧锚钉减轻IC脱粘的效率。新提出的环氧锚的应用具有安装过程简单的优点，包括预先钻孔，然后粘结FRP。总共测试了5个RC梁，包括1个对照样品和4个锚定样品。对未锚固和锚固的RC梁的损伤模式和结构响应进行了评估和讨论。分析和讨论了环氧锚的各种配置的影响。实验结果表明，锚固梁的承载能力和延性分别提高了13.12％和53.31％，与对照样品相比，FRP的应变利用率可以显着提高43.48％。