Error analysis for calculation methods of shear capacity of FRP reinforced concrete beams without web reinforcement based on database

The existing calculation methods of shear capacity of FRP reinforced concrete beams without web reinforcement are inconsistent in considering the factors of shear capacity, and there are different degrees of conservative calculation. Based on the experimental data of shear capacity in published literatures at home and abroad, a database with a sample size of 461 was established in this paper. The effects of six factors, such as the compressive strength of concrete, the width of the beam, the effective depth of the beam, the shear span to depth ratio, the reinforcement ratio of FRP bars and the elastic modulus of FRP bar, on shear capacity were analyzed comprehensively, and the prediction effect of each calculation method was evaluated. The results showed that the influence of each calculation method on the size effect and shear span to depth ratio was not consistent, and there were different degrees of conservative calculation, there was a good correlation between the factors and the shear capacity; among the design provisions recommended by different countries, the CSA/CAN-S806-2012 has a more accurate prediction effect, and the ACI440.1R-2015 has the most conservative prediction effect; among the calculation models provided by scholars, the prediction effect of Ahmed-2021 is more accurate, and that of Alam-2013 is the most conservative. The research results provided the certain referential value for developing the calculation method of shear capacity of FRP reinforced concrete beams without web reinforcement.