NUMERICAL STRESS-STRAIN STATE INVESTIGATION OF THE CONTACT ZONE OF COMPOSITE ELEMENTS MADE OF REINFORCED CONCRETE

Abstract

The results of modeling the stress state, nonlinear deformation and crack resistance of the concrete contact joint of a composite reinforced structure are presented. The simulation was performed by the finite element method in displacements using the SCAD and the Lira FEM software systems. The linear normal and shear forces along the contact joint, the load of crack formation in the joint elements, and the reduced linear shear stiffness in the joint at the beginning of loading and after crack formation numerically calculated. The results of comparative analysis of calculations of values using volume finite elements, approximate analytical dependencies and experimental testing of composite structures as well as numerical studies of the influence of geometric parameters of the contact joint on the change of the stress-strain state in the contact seam are presented.