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Open AccessArticle

Influence of the Cross-Sectional Shape of a Reinforced Bimodular Beam on the Stress-Strain State in a Transverse Impact

1
Department of Transport Systems, Faculty of Roads and Transport Systems, Don State Technical University, Gagarin, 1, 344000 Rostov-on-Don, Russia
2
Department of the Strength of Materials, Faculty of Civil Engineering, Don State Technical University, 344000 Rostov-on-Don, Russia
3
Department of Life Safety and Environmental Protection, Faculty of Life Safety and Environmental Engineering, Don State Technical University, Gagarin, 1, 344000 Rostov-on-Don, Russia
4
Department of Theoretical and Applied Mechanics, Faculty of Agribusiness, Don State Technical University, Gagarin, 1, 344000 Rostov-on-Don, Russia
*
Author to whom correspondence should be addressed.
Buildings 2020, 10(12), 248; https://doi.org/10.3390/buildings10120248
Received: 18 October 2020 / Revised: 10 December 2020 / Accepted: 11 December 2020 / Published: 18 December 2020
The paper considers the stress-strain state of a reinforced concrete beam, as a bimodular material, under the action of an impact. The behavior of bimodular concretes with different moduli of elasticity in tension and compression has not been studied enough. At the same time, taking into account the bimodularity of concrete makes it possible to design a more economical structure, especially for dynamic load. In this article, the impact is considered as an absolutely plastic impact of an absolutely rigid body on an elastic system. The stress state is investigated for beams of rectangular, T-section and I-sections, and is compared with and without the bimodularity of reinforced concrete. The analysis of the dependence of the stress state on the shape, cross-sectional dimensions, and the location of reinforcing bars in the compressed and tensioned zones was carried out for lightweight concrete (Et < Ec) and for heavy concrete (Et > Ec) under the action of shock load with and without regard to the mass of the beam. The numerical study shows that taking into account the mass of the beam upon impact significantly decreases the magnitude of the normal stresses in both the tensioned and compressed zones. Beams of rectangular cross-section have the highest load-bearing capacity when the cross-section height is equal for both light and heavy concrete. An increase in the size of the flange of the I-beam in the stretched zone leads to a sharp decrease in normal tensile stresses and a slight increase in normal compressive stresses. The proposed engineering method makes it possible to numerically study the effect on the stress-strain state of a beam under the action of a concentrated impact of various geometric characteristics of the cross-section, bimodularity of the material, size, number and location of reinforcement. View Full-Text
Keywords: bimodularity; concrete; stress−strain state; reinforced beam; impact; beam shape bimodularity; concrete; stress−strain state; reinforced beam; impact; beam shape
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MDPI and ACS Style

Beskopylny, A.; Kadomtseva, E.; Meskhi, B.; Strelnikov, G.; Polushkin, O. Influence of the Cross-Sectional Shape of a Reinforced Bimodular Beam on the Stress-Strain State in a Transverse Impact. Buildings 2020, 10, 248. https://doi.org/10.3390/buildings10120248

AMA Style

Beskopylny A, Kadomtseva E, Meskhi B, Strelnikov G, Polushkin O. Influence of the Cross-Sectional Shape of a Reinforced Bimodular Beam on the Stress-Strain State in a Transverse Impact. Buildings. 2020; 10(12):248. https://doi.org/10.3390/buildings10120248

Chicago/Turabian Style

Beskopylny, Alexey; Kadomtseva, Elena; Meskhi, Besarion; Strelnikov, Grigory; Polushkin, Oleg. 2020. "Influence of the Cross-Sectional Shape of a Reinforced Bimodular Beam on the Stress-Strain State in a Transverse Impact" Buildings 10, no. 12: 248. https://doi.org/10.3390/buildings10120248

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