RESEARCH OF INFLUENCE OF CORROSION OF REINFORCEMENT ON REINFORCED CONCRETE ELEMENTS` STRESS-STRAIN STATE

Abstract

investments required for new construction and dependence on external factors, which includescientific, technological and economic parameters. Therefore, general trend in construction production is towards the maximum use of existing construction funds, their optimization, reconstruction, strengthening.Reinforced concrete is commonly used for structures for various purposes; therefore, technical and economic aspects of its physical and mechanical parameters` restoration are of great importance.The reinforced concrete element stress-strain state depends on many external factors, including the following: the load type, atmospheric conditions, various defects, damages, geometric deviations. Obviously, one of the most common damages` reasons is rebar corrosion in reinforced concrete elements, which significantly affects both the strength and deformation parameters of the material, as well as the internal stresses` parameters. The main purpose of the work is to conduct the detailed review of available experimental and theoretical studies of the corrosion defects` influence on the reinforced concrete elements` stress-strain state, to provide thorough analysis and systematization of the existing scientific works` results. The conclusion was made, that the reinforcement corrosion significantly complicates the reinforced concrete elements` stress-strain state, reduces the bearing capacity of the whole structure. In the work the attention is paid to material chemical and mechanical peculiarities and kinetics of their changes during the corrosion processes. The paper makes the detailed inventory to major prerequisites of the structure strength decreasing and attributes the basic amplification mechanisms. Veracious methodologies for modelling the stress-strain state changes in corroded reinforced concrete elements are described. Finally, in the article the perspective fields for further research are outlined and recommendations for further experimental and theoretical studies are given.