MODELING OF THE STRESS-STRAIN STATE OF BENDING REINFORCED CON-CRETE ELEMENTS REINFORCED IN A TENSIONED ZONE BY EXTERNAL RE-INFORCEMENT WITH COMPOSITE MATERIALS UNDER LOAD

Abstract

One of the effective types of additional reinforcement when reinforcing reinforced concrete elements is external reinforcement with composite materials. Known methods for calculating the parameters of the stress-strain state of reinforced elements are based on the general deformation and block models, which are used separately without their interaction. For bent reinforced concrete elements reinforced under load in the tension zone, a method has been developed for calculating the parameters of their stress-strain state, taking into account the characteristics of cracking and the redistribution of forces between the main rod and additional external composite reinforcement at all stages of work up to failure, which methodically -ski combines both models. Experimental studies have been carried out confirming the theoretical provisions of the proposed method for calculating the strength, crack resistance and deformability of reinforced concrete elements reinforced with composite materials.