A New Proposal for the Shear Strength Prediction of Beams Longitudinally Reinforced with Fiber-Reinforced Polymer Bars

Abstract

This paper investigates composite reinforcement with regard to its use as longitudinal reinforcement. The methods used to calculate the shear strength of concrete members reinforced with fibre-reinforced polymer (FRP) bars are analysed. The main parameters having a bearing on the shear strength of beams reinforced with composite bars are defined. A comparative analysis of the shear strength calculating algorithms provided in the available design recommendations concerning FRP reinforcement and formulas derived by others researchers is carried out. A synthesis of the research to date on sheared concrete members reinforced longitudinally with FRP bars is made. The results of the studies relating to shear strength are compared with the theoretical results yielded by the considered algorithms. A new approach for estimating the shear capacity of support zones reinforced longitudinally with FRP bars without shear reinforcement was proposed and verified. A satisfactory level of model fit was obtained—the best among the available proposals. Taking into account the extended base of destructive testing results, the estimation of the shear strength in accordance with the proposed model can be used as an accompanying (non-destructive) method for the empirical determination of shear resistance of longitudinally reinforced FRP bars.

Theoretical and Experimental Substantiation of the Efficiency of Combined-Reinforced Glass Fiber Polymer Composite Concrete Elements in Bending

“…Finally, from a price point of view, the cost of our elements is reduced and is more economical, as confirmed by our economic analysis. This is in good agreement with the results of the authors [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]35,[37][38][39][40][41][42][43][44][45][46][47][48][49][50].…”

“…Finally, the works of the authors involved in the study of polymer composite concrete bending elements (beams) [2,5,8,[11][12][13]15,16,35,[37][38][39][40][41][42][43][44][45][46][47][48][49][50] were of particular interest for the development of this study. To improve the performance of bending elements, researchers studied the following for their reinforcement: fiber-reinforced polymers (FRP), glassreinforced polymers (GFRP), composite polymers, reinforcement with jute-polyester fiber (JPFRP), polymers, reinforcement with basalt fiber (BFRP), carbon (CFRP) and aramid (AFRP) fibers.…”

Non-Destructive Testing for Building Evaluation

“…Article [8] presents a new model for estimating the shear capacity of support zones that were reinforced longitudinally using fiber-reinforced polymer (FRP) bars instead of typical shear reinforcement. According to the authors, the shear strength, with regards to the proposed model, can be estimated using an accompanying (non-destructive) method for the empirical determination of the shear resistance of FRP bars.…”

Numerical Simulation of the Bearing Capacity of Variotropic Short Concrete Beams Reinforced with Polymer Composite Reinforcing Bars

“…It should be noted that reinforced concrete, with all its advantages, also has several disadvantages, which are expressed in the high cost of raw materials, such as reinforcing steel, and the large weight of the created structures, products and buildings [ 7 , 8 , 9 , 10 , 11 , 12 ]. All this leads to the fact that modern scientists and engineers are developing, with a certain degree of success, new types of reinforcing elements, such as polymer composite reinforcement, which makes it possible to successfully solve the abovementioned tasks and problems [ 13 , 14 , 15 , 16 , 17 ].…”

“…This condition indicates the importance of the process of designing bending elements reinforced with fiberglass reinforcement, considering both bending and shear. So, for example, in several works [ 7 , 8 , 10 , 16 , 30 , 45 ], the authors, through experimental studies and calculations, developed and proposed new recommendations for calculating the shear strength of beams longitudinally reinforced with fiberglass reinforcement. Oller at al.…”