NUMERICAL MODEL OF A COMPRESSED CONCRETE ELEMENT STRENGTHENED BY FRP JACKETS

Abstract

A calculation was made of a centrally compressed concrete specimen reinforced with a tape FRP jackets in the analysis complex Ansys Mechanical software in the Static Structural module. Substantiated models of materials included in the system of "concrete- FRP jackets" and the parameters that determine them. Stress-strain relation for the control and reinforced samples were obtained using different concrete deformation diagrams, which are regulated by the current Russian regulatory documents. It was revealed that when describing the work of confined concrete by a carbon fiber FRP jackets, the correspondence to experimental data is achieved using a diagram of concrete deformation with a yield point. An assessment of the existing regulatory approach to determining the bearing capacity of elements reinforced with FRP jackets. Suggestions were made for the assignment of other criteria for the limiting state that take into account real deformations.