Abstract
Reinforced concrete as a structural material has a number of characteristic properties that depend on the type of stress-strain state and create certain difficulties in the development of mechanical and mathematical models and algorithms for their implementation. Poor concrete compaction is most often encountered in areas with the highest concentrations of reinforcement or embedded parts. Even in the early stages of deformation, physical nonlinearity manifests itself, consisting of the lack of a proportional relationship between stresses and strains, heterogeneity, anisotropy, and other specific properties. With increasing load, the integral rigidity of the sections decreases, internal forces are redistributed between sections of the structure during structural changes in the materials, and displacements increase. Therefore, for any calculation method, a method for accounting for the physical nonlinearity of concrete and reinforcement deformation is important. This article presents the results of a study of the influence of defects on the stress-strain state of reinforced concrete bending elements of frame structural systems.