Hasenko A. Self-stressed Steel Reinforced Concrete Structures

The purpose of the work is to solve the actual scientific and technical problem of calculation, design and manufacture of resource-efficient self-stressed from its own weight, structural features and technologies for creating steel-reinforced concrete structures. The object of the research is the work of self-stressed steel-reinforced concrete structures. The subject of the research is the stress-deformed state and bearing capacity of self-stressed steel-reinforced concrete structures. Research methods: methods of comparative analysis; methods of mechanics of a deformable solid body; experimental methods of studying the work, stress-strain state, bearing capacity and deformability of structures; finite element method for numerical modeling of structures; methods of mathematical statistics. The scientific novelty of the obtained results: for the first time, based on the analysis and systematization of engineering design methods and measures for creating preliminary stresses in the components of steel-reinforced concrete structures, new types of such structures and methods of their self-stressed were developed; for the first time, for the proposed new types of self-stressed steel-reinforced concrete structures, methods of their calculation were developed, the reliability of which was confirmed by experimental studies; the limits of the efficiency coefficients of such structures were revealed; the calculation model of the bent two-layer steel-reinforced concrete element was improved considering genetic nonlinearity; the method of determining the internal forces in the layers of such a rod considering geometric nonlinearity received further development; based on the new results of experimental tests and numerical modeling with consideration of nonlinearities, calculation schemes for the redistribution of forces in steel-reinforced concrete structures due to their self-stressed have been further developed. The degree of implementation – at 6 objects in the city of Poltava, Poltava region and Kharkiv. Industry – civil engineering.