COMPARATIVE ANALYSIS OF VARIOUS DIAGRAMS OF CONCRETE DEFORMATION ACCORDING TO THE CRITERION OF ENERGY CONSUMPTION FOR DEFORMATION AND DESTRUCTION

Abstract

From the point of view of strength calculations, it is convenient to describe concrete work under load by deformation diagrams "σ-ε" under uniaxial tension and compression. The result of the calculation depends on the shape of the corresponding diagram, the mathematical expression on which it is based and other factors. According to the author, the universal criterion for assessing the resistance of concrete to force impact is the energy consumption for deformation and destruction of the material. This criterion is calculated through a definite integral of the function σ=f (ε). Ten diagrams of concrete deformation under compression and four under tension from available and original literature sources are considered using this integral. Some qualitative and quantitative regularities are established. The following conclusion is made: compression diagrams can be recommended for further improvement of the nonlinear deformation mode: three-line, curvilinear; the stretching diagrams and are the most suitable for engineering calculations when using the considered model in its modern form.