Modeling of the Stress-Strain State of Prestressed Reinforced Concrete Elements Reinforced With Composite Material

The results of applying a deformation and block models to determine the parameters of the stress-strain state and calculate the strength of prestressed bent reinforced concrete elements reinforced in a stretched zone with carbon fiber plates glued to the outer surface of concrete and glued into pre-made vertical grooves are presented. When calculating the parameters of the stress-strain state of reinforced elements, the distribution of relative deformations and stresses in the cross section of the element before reinforcement is taken into account, including the effect of the compression force transmitted to the concrete by the prestressed main reinforcement. The distribution of relative deformations and stresses in the cross section of the prototypes at the main stages corresponding to different loading stages is given. The verification of the proposed methodology for calculating the strength of prestressed bent reinforced concrete elements reinforced with composite material has been carried out.