Abstract
A bonding zone between elements of layered composite concrete structure was investigated. Results of stress-strain state, nonlinear deformation, and crack resistance of this zone are presented. The bonding zone simulation was performed using the developed methodology based on the finite element method. The problem was solved in a nonlinear formulation using elements with nonlinear material properties and one-side contact elements. A fragment of a layered structure made of two concretes with different strength and under the action of shear forces was considered. Based on the available experimental data, shear stiffness of the bonding zone was calculated. The simulation of the deformation process for the composite structure was performed taking into account its nonlinear deformation and consideration of the cracking process up to the moment of its complete failure. The obtained results of are compared with experimental data. The necessity of using the actual strength and deformation characteristics of the shear of the bonding zone when modeling the deformation process and evaluating the ultimate breaking load is shown.
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