This paper presents an analysis of the performance of different existing formulations to quantify the FRP contribution to the shear strength of RC elements strengthened in shear by externally bonded FRP sheets. A large database of 555 tests has been assembled distinguishing between the shape of the section, the existence of internal transverse reinforcement and the FRP configurations. In general, predictions are more conservative for beams without transverse reinforcement. In addition, in some cases predictions are unsafe for beams with transverse reinforcement, showing a possible interaction with the internal transverse reinforcement which is not considered in the experimental FRP contribution to the shear strength. For wrapped FRP configurations, models generally assumed failure at the bottom corner of the section and results are very conservative in some cases where failure was experimentally observed along the web. For U-shaped and side-bonded configuration, results depend mainly on the assumed bond model and are more accurate than in the previous case, showing for some models unsafe predictions for the continuous FRP system applied in beams with transverse reinforcement.

本文介绍了对不同现有配方性能的分析，以量化FRP对外部粘结FRP板在剪切作用中增强的RC元件的剪切强度的贡献。已组装了一个包含555个试验的大型数据库，以区分截面的形状，内部横向钢筋的存在和FRP构造。通常，对于没有横向加固的梁，预测更为保守。此外，在某些情况下，对于具有横向钢筋的梁，预测是不安全的，这表明可能与内部横向钢筋发生相互作用，这在实验FRP对剪切强度的贡献中并未考虑。对于包装的FRP配置，这些模型通常假定该断面的底角处存在故障，并且在某些情况下，沿网沿实验观察到故障的结果非常保守。对于U形和侧粘结构型，结果主要取决于假定的粘结模型，并且比以前的情况更准确，这表明对于某些模型，对连续FRP系统应用于横向钢筋的连续FRP系统的不安全预测。