ADDITIONAL REINFORCEMENT OF CONCRETE AND REINFORCED CONCRETE STRUCTURES WITH COMPOSITE MATERIALS

Setting the task. The main task to be solved at all stages of the life cycle of buildings and structures is to ensure reliability under specified conditions and operating modes. Increasing the durability of reinforced concrete structures is solved by using non-metallic composite reinforcement. Composite reinforcement is effectively used in the manufacture of precast and monolithic reinforced concrete, as well as in the reinforcement of exploited reinforced concrete structures. The development of the design theory of this class of structures involves experimental and theoretical research. The purpose of the work is to study bent reinforced concrete elements, including those with torsion, reinforced with external reinforcement and concrete elements with rod composite reinforcement, to study the joint work of composite materials with concrete as part of the structure. Research objectives: to study the strength and deformability of concrete structures reinforced with composite polymer reinforcement and reinforced concrete structures reinforced with external reinforcement; to assess the adhesion of external composite reinforcement to the surface of concrete structures; to develop proposals for the normalization of the mechanical characteristics of composite reinforcement. Results. The results of experimental studies of bent and torsion-bent reinforced concrete elements under short-term and long-term loading are presented, as well as the results of studies of bent concrete elements with rod reinforcement. Conclusions. The significance of the results lies in the fact that the new experimental data obtained will allow us to improve the methodology for designing structures with composite reinforcement.