PLASTICITY MODEL OF REINFORCED CONCRETE STRUCTURES
https://doi.org/10.33979/2073-7416-2023-106-2-39-58
Abstract
A model of plasticity of reinforced concrete structures is considered, based on on the transformations of the intensity of the “stress-strain” connection by projecting the tensors of this connection, using special transitions for the main angle of deformations, total shear deformations, etc.). At the same time, the modulus of plasticity of concrete, the coefficient of transverse deformations are determined, and complex functions are constructed for linear and angular deformations in sections, taking into account deformation, gradients of deformations during the formation of cracks and stiffness changes. The hypotheses adopted for the calculation model determine the distribution of force flows - blocks for compressed and stretched concrete (first object), "main cracks" from the mechanics of destruction of reinforced concrete, complex functions and a two-cantilever element for modeling the deformation effect of reinforced concrete, developed by the author (second object). Tensile concrete resistance is transferred to the working reinforcement and is modeled using the sum of the average values of the longitudinal and transverse forces, as well as the average reduced coefficient of tension concrete. The "pin (nagel)" effect in the reinforcement crossed by a crack was obtained using the model of the second level of structural mechanics for a reinforcing bar with two pinched ends. The opening of the crack and the shift of the crack edges are simulated. The main force vector in the reinforcement is characterized by the values of longitudinal and transverse displacements (the third object).
About the Author
Vladimir Iv. Kolchunov
Southwestern state university; Scientific Research Institute of Construction Physics RAACS
Russian Federation
Russian Federation
сorresponding member of the Russian Academy of Architecture and Construction Sciences, Doctor of Technical Sciences, Professor, Professor of the Department of Unique Buildings and Structures, Southwestern state university; principal researcher, Scientific Research Institute of Construction Physics RAACS
Kursk
Moscow
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Review
For citations:
Kolchunov V.I. PLASTICITY MODEL OF REINFORCED CONCRETE STRUCTURES. Building and Reconstruction. 2023;(2):39-58. (In Russ.) https://doi.org/10.33979/2073-7416-2023-106-2-39-58
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