Calculation of reinforced concrete members strength by new concept = Розрахунок міцності залізобетонних елементів за новою концепцією

Abstract

The paper presents a generalized deformation model for the calculation of building structures made of reinforced concrete, which is considered as composite material formed of reinforcement and concrete. On this basis, it is proposed to introduce new concept – the design strength of reinforced concrete – into the modern nonlinear theory of reinforced concrete. This allows us to reduce the structural analysis of reinforced concrete members to the methodology of calculations introduced in the classical "strength of materials", which contributes to a significant simplification and acceleration of the design process of both single members and structures in general. The main advantage of the structural analysis method with the use of the reinforced concrete strength concept is that it remains unchanged when changing the stress-strain diagrams of reinforcement and concrete, the introduction of new information about these materials properties, technological parameters, loads, etc. Only one parameter – the design strength of the reinforced concrete, which is synthesized for all of the above factors, is changed in the proposed analysis method. This approach to the structural analysis of reinforced concrete members makes it universal for all deformation types of reinforced concrete members. The paper demonstrates and confirms the possibility of using the developed methodology not only in the bearing capacity calculations of reinforced concrete members, but also in calculations of the crack formation and in checking the crack width.