The article discusses issues related to the study of the influence on the deformability of concrete beams of heavy concrete reinforcing steel to replace the carbon fiber arranged in two rows. Found that delamination of the composite beams with reinforcement throughout the range of loads up to 46-54% compared with the reference.

Keywords: concrete, steel, carbon-fiber reinforcement, test samples, strength, steps of loading, deformability, cracking, load level

The article discusses issues related to the strength of the normal sections of reinforced concrete beams in which the steel reinforcement is completely or partially replaced by a carbon fiber rod arranged in two rows. Found that the strength of these beams is only 13% higher than that of the reference.

Keywords: concrete, steel, composite reinforcing, test samples, strength, failure modes, load level