English
Русский
Buildings and structures made of reinforced concrete are currently designed, as a rule, under the assumption of linear work of the material. However, in accordance with the requirements of modern standards, it is necessary to take into account the nonlinear operation of concrete and reinforcement in calculations. In the research presented in the article, using the example of a building with a wall structural system, the influence of taking into account the physical nonlinearity of reinforced concrete on the operation of its structures was considered. It was received that due to the nonlinear operation, there is a prospect of a possible reduction in the calculated forces affecting the strength and width of crack opening, and, consequently, the reinforcement consumption. In addition, when taking into account the work of reinforcement in the zone of yield stresses in ceilings and walls, local plastic areas may form that require reinforcement, which are not fixed in linear calculations.
The calculations were performed in the LIRA-CAD 2021 software package. The results of the calculations showed that taking into account the nonlinear operation of reinforced concrete when considering the floors of a building allows reducing the design efforts compared to calculations performed in a linear formulation by about (3 - 30)%, and when calculating walls, on the contrary, taking into account the physical nonlinearity of reinforced concrete, internal forces increase in some cases more more than twice. Taking into account the physical nonlinearity of reinforced concrete work also leads to a more correct assessment of floor deflections.
The calculations were performed in the LIRA-CAD 2021 software package. The results of the calculations showed that taking into account the nonlinear operation of reinforced concrete when considering the floors of a building allows reducing the design efforts compared to calculations performed in a linear formulation by about (3 - 30)%, and when calculating walls, on the contrary, taking into account the physical nonlinearity of reinforced concrete, internal forces increase in some cases more more than twice. Taking into account the physical nonlinearity of reinforced concrete work also leads to a more correct assessment of floor deflections.
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[3] Klyuev S.V., Kashapov N.F., Radaykin O.V., Sabitov L.S., Klyuev A.V., Shchekina N.A. Reliability coefficient for fibreconcrete material. Construction Materials and Products. 2022. 5 (2). P. 51 – 58. https://doi.org/10.58224/2618-7183-2022-5-2-51-58
[4] Gorodetsky A.S., Evzerov I.D. Computer models of structures. Kiev: Publishing House Fact, 2007. 344 р.
[5] Gorodetsky A.S., Barabash M.S., Sidorov V.N. Computer modeling in problems of structural mechanics. M.: ASV Publishing House, 2016. 337 р.
[6] Novoselov O.G., Sabitov L.S., Sibgatullin K.E., Sibgatullin E.S., Klyuev A.S., Klyuev S.V., Shorstova E.S. Method for calculating the strength of massive structural elements in the general case of their stress-strain state (kinematic method). Construction Materials and Products. 2023. 6. (3). P. 5 – 17. https://doi.org/10.58224/2618-7183-2023-6-3-5-17
[7] Klovanich S.F., Bezushko D.I. Finite element method in nonlinear calculations of spatial reinforced concrete structures. Odessa: ONMU Publishing House, 2009. 89 р.
[8] Kenzhimbetov T.A., Varlamova T.V. Design of high-rise buildings in earthquake-prone areas with high wind loads. Design and construction: Collection of scientific papers of the 3rd International Scientific and Practical Conference of Young Scientists, Postgraduates, Masters and Bachelors. Moscow: Southwest State University, Moscow State Engineering University, 2019. P. 219 – 222.
[9] Gamayunov V.P., Esin A.I., Isaev A.A. On the issue of ensuring the reliability of reconstructed buildings. Resource and energy efficient technologies in the construction complex of the regio. 2014. 4. P. 228 – 232
[10] Karpenko N.I., Sokolov B.S., Radaykin O.V. On the determination of deformations of bent reinforced concrete elements using deformation diagrams of concrete and reinforcement. Construction and reconstruction. Collection of scientific papers. Orel: Oryol State University named after I.S. Turgenev, 2016. 5. P. 19 – 25.
[11] Ksenofontova T.K. Engineering structures (3rd edition revised and supplemented). Publisher MSUEE, 2011. 143 р.
[12] Varlamova T.V., Ksenofontova T.K., Verkhoglyadova A.S., Mareeva O.V. Consideration of dynamic impacts in the design of cantilever structures. Construction Materials and Products. 2022. 5 (6). P. 54 – 63. https://doi.org/10.58224/2618-7183-2022-5-6-54-63
[13] Korenkov P.A. Construction of a computational model taking into account the nonlinear properties of the material in the analysis of the danger of progressive collapse of reinforced concrete frames. Construction and technogenic safety. Collection of scientific papers. M.: Publishing house of KFU named after V.I. Vernadsky. 2013. 28. 33 р.
[14] Klyuev S.V., Shlychkov D.I., Muravyov K.A., Ksenofontova T.K. Optimal design of building structures. International Journal of Advanced Science and Technology. 2020. 29(5). 2577–2583.
[15] Ksenofontova T.K. The method of calculating statically indeterminate reinforced concrete structures, taking into account the redistribution of forces during cracking. Nature management. 2008. № 4. P. 88 – 95.
Ksenofontova T.K., Mareeva O.V., Verkhoglyadova A.S. Calculation of monolithic buildings structures taking into account the nonlinear operation of reinforced concrete. Construction Materials and Products. 2024. 7 (1). 4. https://doi.org/10.58224/2618-7183-2024-7-1-4