Control of the deformation process of bending reinforced concrete elements with organized defects

The object of the study is non-crack-resistant bending reinforced concrete elements in which, during manufacture in a stretched zone, during operation, a system of discrete initial defects is organized in the form of slots or notches. This procedure aims to give the cracking process an organized character, which will decrease deflections and the width of normal cracks. Method. A model has been developed for estimating the parameters of the stress-strain state for elements with initial notches, which considers the occurrence of significant distortions in the diagram of relative deformations of concrete in the zone directly adjacent to the deformation concentrators. Results. The numerical data of the calculation illustrate the results obtained in the form of resolving equations, the distribution of relative deformations in the section, and the bending stiffness. The data of the performed calculations generally confirm the experimental results obtained on beams and hollow-core slabs with initially organized defects in the form of slots.