Strength and Deformation of Bendable Plastic-Concrete-Tubal Structures

Abstract

In modern construction production, structures with the use of tube concrete elements are increasingly used [1]. The use of such structures can significantly reduce the weight of the building, as well as reduce the cost of construction and installation works by 2-3 times compared with similar structures made of classical reinforced concrete. At the same time, labor costs are reduced by 4–5 times. In comparison with metal structures, the cost is significantly reduced and the steel consumption is reduced by a factor of 2–3 with a slight increase in weight. Currently in our country the use of tube concrete structures is not widespread due to insufficient study of their work under various influences. The tube in tube concrete structures simultaneously plays the role of a shell, as well as longitudinal and transverse reinforcement. For a classic tube concrete, the tube is able to perceive the resulting forces from different angles and in all directions. Concrete in the plastic tube, being in conditions of triaxial compression and withstands stresses considerably exceeding the cube and prism strength of concrete. In such structures, the tube prevents the formation of microcracks in the concrete core.