Research of the Stress Condition of the Normal Section of Reinforced Concrete Elements using Nonlinear Deformation Model

This article presents a technique to describe the stress-strain state of the normal section of reinforced concrete beams using nonlinear deformation model. An algorithm of describing the section operation built with the use of mathematical apparatus in the «MathCAD» environment. This algorithm allowed details to consider the state of stress of the normal section on the basis of stepper-iterative and integrated processes using real materials deformation diagrams. During algorithmization of section operation, we determined stresses, strains, nonlinear coefficients, the center of gravity of real diagrams of stresses and strains, the coordinates of the vertices of normal cracks, boundaries compressed, tensioned and damaged zones of section and other. Modern positions in the theory of concrete strength were applied and refined.