Stovba L. Strength and Deformation Concrete-Filled Flexible Elements with Slim-Side Tube of the Square Section

The object - tube-concrete elements with tube of the square section working on a bend; the purpose - the method of calculation and recommendations of concrete-filled flexible elements with tube of the square section, on the basis of theoretical and experimental research are develop; the methods - the conducting an experimental and theoretical researches of the strain-deformation condition and limit states of tube-concrete beams of the square section; the theoretical principles of research of the limit state based on the method of limiting equilibrium; the novelty - the new structural forms of the steel and reinforced concrete structure with tube of the square section and concrete are created; derived from experimental research supplemented by data about the strain-deformation condition of the steel and reinforced concrete structure beams with external reinforcement by tube of the square section; the experimental data of different classes of concrete on the strength and deformation of the flexible elements are considered in the first; the method of calculating of the strength of the investigated elements are developed; the method of estimating the strain-deformation condition of flexible elements are proposed in the first; the results - the proposals of the methods of calculation and design tube-concrete beams of square section are presented; the new structures of the beams reinforced with Slim-side tube of the square section and recommendations on their designing are suggested; the introduction - the results of the work of the tube-concrete structures made by different design companies were used in the design; the branch - building.