Abstract
The aim of the work - to analyze the theory, which is widely used in the calculations of various constructions and buildings, consisting of five theories that do not correspond to each other (or erroneous), which reject the fundamental properties of structural concrete and the principles of the Eurocode. Methods. According to the authors and their research this theory contains: a set of theories of various purposes rejecting each other, including erroneous, physically impossible jumps from one theory to another, jumps of various design schemes, unacceptable in the elastoplastic stage. In it: there are mathematical errors; the fundamental concepts of the classical and general theory of calculation are distorted; the principle of designing bearing capacity in ultimate conditions and the process of continuous loading of structures established by the Eurocode are rejected; the fundamental properties in Eurocode of structural concrete are replaced; it is stated that the theory is determined not by the properties of materials, but by the partialities of the developers; references are made to the abstract results of experiments. Results. We analyze the theory of calculating for mass application which accompanied by the necessary mathematical calculations and experimental estimates.