Modern Theory of Creep of Reinforced Concrete
- Authors: Beglov A.D.1, Sanjarovskiy R.S.2, Ter-Emmanuilyan T.N.3
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Affiliations:
- Administration of St. Petersburg
- Eurasian National University named after L.N. Gumilev
- Russian University of Transport
- Issue: Vol 20, No 1 (2024)
- Pages: 3-13
- Section: Analysis and design of building structures
- URL: https://journals.rudn.ru/structural-mechanics/article/view/38254
- DOI: https://doi.org/10.22363/1815-5235-2024-20-1-3-13
- EDN: https://elibrary.ru/WVKFJM
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Abstract
The important features of the theory of creep of reinforced concrete, identified and published earlier, are explored. The creation and development of the theory of creep of reinforced concrete is based on non-scientific principles take from systems of classical mechanics that do not correspond to this theory. A detailed analysis of the theory used in many countries was performed, while five oversimplifications were identified that reject fundamental experiments, Eurocodes, rules of mathematics and mechanics: listed in the law of creep, oversimplifications that grossly distort the calculation results, not only the deformations themselves, but also subsequent methods for calculating reinforced concrete structures. These include: unnecessarily modified classical Hooke’s law; imposing a property missing from concrete - an algebraic measure of creep; erroneous superposition principle; use of viscoelastic deformations instead of instantaneous nonlinear plastic deformations; replacement of obvious - nonlinear and non-stationary properties of concrete with linear ones, distorting the qualitative side of phenomena inherent only in nonlinear systems. These errors are covered by unreasonable safety factors, which undermines the economic component of the problem, and of the enormous volumes of reinforced concrete used throughout the world, the analyzed unscientific theory of its calculation causes enormous economic damage in global construction.
About the authors
Alexander D. Beglov
Administration of St. Petersburg
Email: gubernator@gov.spb.ru
ORCID iD: 0009-0004-2350-492X
Doctor of Economics, Governor of St. Petersburg
St. Petersburg, RussiaRudolf S. Sanjarovskiy
Eurasian National University named after L.N. Gumilev
Email: milasanj@gmail.com
ORCID iD: 0000-0002-7412-3789
Doctor of Technical Sciences, Professor, Chief Scientific Associate
Astana, Republic of KazakhstanTatyana N. Ter-Emmanuilyan
Russian University of Transport
Author for correspondence.
Email: tanya_ter@mail.ru
ORCID iD: 0000-0002-4723-8193
Doctor of Technical Sciences, Professor of the Department of Theoretical Mechanics
Moscow, RussiaReferences
- Yu Q., Bazant Z.P., Wendner R. Improved Algorithm for Efficient and realistic Creep Analysis of Large Creep — Sensitive Concrete Structures. ACI Structural Journal. 2012;109(5):665–675.
- Muller H.S., Reinhardt H.W. Beton. Betonkalender 2010. 2010;1:293–436.
- Chiorino M.A., Sassone M. Further considerations and updates on time dependent analysis of concrete structures. Structural Concrete: Textbook on Behaviour, Design and Performance. Lausanne: International Federation for Structural Concrete;2010:43‒69.
- ACI 318R-19, Building Code Requirements for Structural Concrete. 2018.
- fib, Model Code for Concrete Structures 2010, Ernst & Sohn, 2013.
- Volterra V. Lecons sur les fonctions de lignes. Paris, 1913. Available from: https://archive.org/details/leonssurlesfon00voltuoft/page/8/mode/2up (accessed: 22.05.2023).
- ACI 209.3R-XX, Analysis of Creep and Shrinkage Effects on Concrete Structures, Final Draft, Chiorino M.A. (Chairm. of Edit. Team), ACI Committee 209. March 2011.
- ACI 209.2R-08, Guide for Modeling and Calculation of Shrinkage and Creep in Hardened Concrete, American Concrete Institute, Farmington Hills, MI, 2008.
- Chiorino M.A. Analysis of structural effects of time — dependent behavior of concrete: an internationally harmonized format. Concrete and Reinforced concrete — Glance at Future III. All Russian (International) Conference on Concrete and Reinforced Concrete. Moscow, 2014;7:338–350.
- Creep Analysis, www.polito.it/creepanalysis, DESIGN Dipartimento di Ingegneria Strutturale e Geotechnika Politechniko di Torino, (currently under revisionce chould be made to new version to be edited in 2018).
- Boltzman L. Zur Theorie der Elastischen Nachwirkung. Sitzungsberichte Kaiserliche Akademie Wissenhaft Wien Mathematische-Naturwissenhaft. 1874;70:275–306.
- Sanjarovskiy R., Ter-Emmanuilyan T., Manchenko M. Superposition principle as the fundamental error of the creep theory and standards of the reinforced concrete. Structural mechanics of engineering constructions and buildings. 2018;14(2):84–92. (In Russ.) https://doi.org/10.22363/1815-5235-2018-14-2-92-104
- Mac Henry D. A Lattice Antolog for the Solution of stress Problems. Journal of the Institution of Civil Engineers. 1943;21(2):59–82. https://doi.org/10.1680/ijoti.1943.13967
- Freudenthal A.M., Roll F. Creep and creep recovery of concrete under high compressive stress. Journal Proceedings. 1958;54(6):1111–1142.
- Krylov S.B., Arleninov P.D. Modern research in the field of the theory of concrete creep. Bulletin of the Scientific Research Center “Construction” Concrete and reinforced concrete — problems and prospects. 2018;1(16):67–76. (In Russ.)
- Aleksandrovsky S.V. Calculation of concrete and reinforced concrete structures for changes in temperature and humidity, taking into account creep. Moscow: Stroyizdat Publ.; 1973. (In Russ.)
- Beglov A., Sanjarovsky R., Ter-Emmanuilyan T. Theory of short — term and long — term resistance of structures based on the principle of plastic. Structural mechanics of engineering constructions and buildings. 2023;19(2):178–186. (In Russ.) http://doi.org/10.22363/1815-5235-2023-19-2-186-198
- Rabotnov Yu.N. Creep of structural elements. Moscow: Nauka Publ.; 1966. (In Russ.)
- Rabotnov Yu.N. Elements of hereditary mechanics of solids. Moscow: Nauka Publ.; 1977. (In Russ.)
- Clark G. Challenges for concrete in tall buildings. Concrete and Reinforced Concrete — Glance at Future: III All Russian (International) Conference on Concrete and Reinforced Concrete. Moscow. 2014;7:103–112.
- Beglov A.D., Sanzharovsky R.S. European standards and nonlinear theory of reinforced concrete. St. Petersburg, 2011. (In Russ.)
- Sanzharovsky R.S. Stability of building structure elements under creep. Leningrad: Publishing house of Leningrad State University;1984. (In Russ.)
- Beglov A., Sanjarovsky R., Ter-Emmanuilyan T. Stationary dissipative systems of classical mechanics in the basis of unscientific principles of the theory of creep of reinforced concrete. IOP Conference Series: Materials Science and Engineering. Kosice, Slovakia, 2022;1252:012033. https://doi.org/10.1088/1757-899X/1252/1/012033
- Sanjarovskiy R., Ter-Emmanuilyan T., Manchenko M. Creep of Concrete and Its Instant Nonlinear Deformation in the Calculation of Structures. Concreep. 2015;10:238–247. https://doi.org/10.1061/9780784479346.028