Resistance of stretched concrete in composite non-centrally compressed reinforced concrete structures

Abstract

In relation to composite non-centrally compressed reinforced concrete structures, a computational model and deformation dependences are constructed to assess the resistance of stretched concrete from integral internal forces, taking into account the effect of breaking the continuity of concrete during cracking. The hypothesis of flat sections can be accepted for the middle sections located in the areas between the cracks and experiencing impacts on the left and right, only within one of the rods forming a composite rod. In this case, conditional concentrated shifts, which are called strain gradients, are taken into account in the composite rod at the points of contact joints of adjacent elements. As a result, in a system consisting of concrete blocks and reinforcement, reactions occur in the vicinity of cracks due to the contact of concrete and reinforcement caused by this effect – the deformation effect. The analysis of experimental data has established characteristic diagrams of deformations of reinforcement and concrete in the area between cracks taking into account the influence of this effect.