Non-equilibrium and nonlinear processes in robustness potential evaluation of reinforced concrete structural systems in ultimate states

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Abstract

The problems of non-equilibrium and nonlinear processes in the evaluation of reinforced concrete structural systems robustness potential in ultimate states are considered. The definition of concept of “robustness exposition” is given for a quantitative assessment of the robustness potential. A calculation model based on the generalization of the well-known classical relationship between the current relative deficit change rate of the reinforced concrete stress-strain state with respect to each fixed time value is proposed to describe in time non-equilibrium processes of structural materials force resistance depending on the mode and level of loading. On the basis of the linear creep theory, aging materials, an algorithm was developed to determine the measure of creep, corrosion-damaged concrete and reinforced concrete and to determine the parameter “robustness exposition” of a reinforced concrete statically indeterminate structural system, taking into account non-equilibrium and nonlinear processes of its deformation in time. An example of a single-span rigidly clamped reinforced concrete beam calculating the robustness potential from the position of a special limiting state criterion is considered.

About the authors

Natalia B. Androsova

Orel State University named after I.S. Turgenev; Scientific Research Institute of Construction Physics of the RAACS

Author for correspondence.
Email: ramia84@rambler.ru
ORCID iD: 0000-0003-1251-7106

PhD of Technical Sciences, Associate Professor, Head of Department of Building Constructions and Materials, Orel State University named after I.S. Turgenev; Research Associate, Scientific Research Institute of Construction Physics of the Russian Academy of Architecture and Construction Sciences

95 Komsomolskaya St, Orel, 302026, Russian Federation; 21 Lokomotivnyi Proezd, Moscow, 127238, Russian Federation

Vitaly I. Kolchunov

South-West State University; Scientific Research Institute of Construction Physics of the RAACS

Email: asiorel@mail.ru
ORCID iD: 0000-0001-5290-3429

Academician of the Russian Academy of Architecture and Construction Sciences, D.Sc. in Technical Sciences, Professor, Head of the Department of Unique Buildings and Structures, South-West State University; Research Associate, Scientific Research Institute of Construction Physics of the Russian Academy of Architecture and Construction Sciences

94 50 let Oktyabrya St, Kursk, 305040, Russian Federation; 21 Lokomotivnyi Proezd, Moscow, 127238, Russian Federation

Sergey G. Emelyanov

South-West State University

Email: rector@mail.ru
ORCID iD: 0000-0002-3012-0383

corresponding member of the Russian Academy of Architecture and Construction Sciences, D.Sc. in Technical Sciences, Professor of the Department of Unique Buildings and Structures

94 50 let Oktyabrya St, Kursk, 305040, Russian Federation

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Copyright (c) 2022 Androsova N.B., Kolchunov V.I., Emelyanov S.G.

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