Yaroslavl, Yaroslavl, Russian Federation
The article considers the different types of reinforced concrete slabs for construction. They have different features for fixing the reinforcing element in concrete. To determine the parameters of the stress-strain state of a reinforced concrete element we use the A. R. Rzhanitsyn's compound bar model. It was adapted to solve problems taking into account the nonlinear effects accompanying the deformation process of a reinforced rod. A specific feature of the approach is the possibility of modelling the crack formation process as a system of evolving discrete cracks. The results allow to introduce different types of shear bond stiffness into the calculation. The method considers the traditional distributed type of contact between reinforcement and concrete. The study also presents an approach to account for the discrete type of contact both between the reinforcement and the concrete elements, which occurs in reinforced concrete structures as well as in post-tensioned structures. The proposed model allows the consideration of reinforced concrete structures with regular reinforcement. It is also possible to determine the forces for prestressed and post-stressed elements. The results are presented as finite formulas and implemented the numerical-analytical approach.
concrete-to-steel bond, compaund bar, distributed contact, discrete contact, discrete crack, shear bond stiffness, post-tensioned structures, monostrand
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