Pliability of a composite rod glued into concrete

The object of research is the connection of composite rods glued into concrete. The purpose of this work is to numerically study the stress-strain state of a glued composite rod under the action of a pull-out load. Method. To analyze the stress-strain state of the connection, a spatial finite element model was used. Physically nonlinear finite elements are used for specific modeling. For the calculations, a nonlinear diagram of the deformation of concrete and steel reinforcement were used, given in the regulatory documents for the design of reinforced concrete structures. Composite rods with epoxy adhesive are elastically deformed. The design scheme was modeled with spatial finite elements. Results. A numerical analysis of the stress-strain state of a glued joint was carried out using the example of a precast reinforced concrete frame. The results of structural calculations considering the compliance of the glued layer and without it were compared. The comparison results show that considering the flexibility of glued layer is not essential for the design; the maximum loads decreased by 5%.