Kazimahomedov F. Effective concrete-filled steel tubular flexural elements

Subject - beam, fibrous concrete, concrete-filled steel tubular structures, stress-strain state, deflection; Aim - to develop an optimal composition of concrete-filled steel tubular cores with high strength-deformability parameters and betted adhesion to the membrane in order to reduce the sag of concrete-filled steel tubular beams and develop a design methodology for this type of beams; methods - analytical, experimental, mathematical, statistical; novelty - a data regarding the effect of fibrous concrete on the strength and deformability of bending concrete-filled steel tubular elements was obtained; the adhesion strength of various core concrete types with the inner surface of steel ferrule was investigated; a data regarding stress-strain state of bending concrete-filled steel tubular elements with custom core was obtained; results - a concrete-filled steel tubular beam with low deformability and high adhesion force between the core and the shell was obtained; application - new construction and reconstruction of building and infrastructure.