Experimental Diagrams of Fiber Concrete Straining under Tension and Compression and their Implementation in Calculation of Bearing Capacity of Fiber-Reinforced Concrete Flexural Elements

On the basis of experimental data, calculating diagrams of non-linear straining of fiber concrete under compression and tension were developed, which take into consideration the qualitative change in strength and stress-strain properties of the concrete matrix at its fiber reinforcement. The obtained diagrams are realized upon the bearing capacity calculation of fiber-reinforced concrete flexural elements. Calculation of fiber-reinforced beam was fulfilled according to the proposed approach and current regulatory documents. Comparison of calculation results was carried out, according to which the regulatory procedure gives an overstated result for its bearing capacity.