In order to evaluate the accuracy of the existing formulas for calculating the punching shear strength of FRP reinforced two-way concrete slabs,the mathematical statistical method was used to evaluate the collected 38 sets of experimental parameters for punching shear strength of FRP reinforced two-way concrete slabs.The results demonstrate that the main factors affecting the punching shear strength of FRP reinforced two-way concrete slabs include concrete strength,critical punching section perimeter,effective slab thickness,FRP reinforcement ratio and its elastic modulus,and size effect;Among the 10 evaluated punching shear strength calculation formulas,the prediction results of the formu-las by the design specifications are mostly conservative,and their accuracy is lower than the formulas in the literature;The predicted results by the Ospina formula are closest to the experimental results,and its prediction accuracy is the highest.The average ratio of prediction to experimental results is 1.03,the standard deviation is 16.04% ,and the coeffi-cient of variation is 15.53% .This study provides a reference for further optimization of the formula for calculating the punching shear strength of FRP reinforced two-way concrete slabs.
维普
万方数据