Seven reinforced concrete (RC) T-beams, comprising two unstrengthened (control) beams and five beams strengthened in shear with embedded FRP bars, were tested to failure. The test parameters were steel-to-FRP shear reinforcement ratio and tension reinforcement ratio. A nonlinear finite element (FE) model was developed, validated and used to conduct parametric studies. The experimental and FE results showed that the concrete and FRP contributions to shear resistance as well as the total shear force capacity all decrease with increasing steel-to-FRP shear reinforcement ratio. The tension reinforcement ratio influenced the failure mode of the tested and modelled beams but had insignificant impact on shear strength enhancement. The experimental results were compared with the FE and Concrete Society Technical Report 55 predictions. The FE model correctly reproduced the experimental results and gave accurate predictions, with a mean predicted-to-experimental ratio of 1.04, whereas TR55 gave conservative predictions, with a mean predicted-to-experimental ratio of 0.42.

测试了七个钢筋混凝土（RC）T形梁的破坏，包括两个未加强（控制）梁和五个在剪切力下用嵌入式FRP筋加固的梁。测试参数为钢与FRP的剪切增强比和拉伸增强比。开发，验证并使用非线性有限元（FE）模型进行参数研究。实验和有限元分析结果表明，混凝土和FRP对抗剪强度的贡献以及总抗剪承载力均随着钢/ FRP抗剪增强比的增加而降低。拉伸强度比影响了测试梁和模型梁的破坏模式，但对剪切强度的提高影响不大。将实验结果与有限元和混凝土协会技术报告55的预测进行了比较。