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  4. MODELING THE IMPACT OF DAMAGE TO THE CONCRETE COVER AND THE COMPRESSED REBAR OF A REINFORCED CONCRETE BEAM IN "LIRA-SAPR"

MODELING THE IMPACT OF DAMAGE TO THE CONCRETE COVER AND THE COMPRESSED REBAR OF A REINFORCED CONCRETE BEAM IN "LIRA-SAPR"

JTBP.
2025;
Volume 7, Number 1
: 19-30
https://doi.org/10.23939/jtbp2025.01.019
Received: February 27, 2025
Revised: March 20, 2025
Accepted: May 02, 2025
Authors:
  1. Volodymyr Kravchuk
  2. P. Vegera
  3. R. Khmil
1
Department of Building Construction and Bridges, Lviv Polytechnic National University
2
Lviv Polytechnic National University, Department of building construction and bridges
3
Lviv Polytechnic National University, Department of building construction and bridges

Most modern buildings use reinforced concrete elements, which can sustain damage during operation, creating potential risks for their safe use. This article focuses on the analysis of reinforced concrete beams with cross-sectional damage using the LIRA-SAPR software suite. Special attention is given to the damage of the protective concrete layer and the top compressed reinforcement, which is crucial for assessing the residual load-bearing capacity and the stress-strain state of the structures. The modeling of reinforced concrete elements is performed using the finite element method. The obtained results have practical significance for further research and the improvement of methods for evaluating the residual load-bearing capacity of reinforced concrete structures, which will help reduce the risk of failure of such elements during operation.

damage; reinforced concrete beam; modeling; LIRA-SAPR; stress; concrete cover

Blikharskyy, Y., & Kopiika, N. (2022). Аnalysis of the most common damages in reinforced concrete structures: a review. Theory and Building Practice, 4(1), 35-42. https://doi.org/10.23939/jtbp2022.01.035
https://doi.org/10.23939/jtbp2022.01.035
Kravchuk, V., Vegera, P., & Khmil R. (2024). Analysis of the impact of cross-section damage on the strength and deformability of bent reinforced concrete elements.  Theory and Building Practice, 6(2), 19-27. https://doi.org/ 10.23939/jtbp2024.02.019
https://doi.org/10.23939/jtbp2024.02.019
Voskobiinyk, O.P, Kitaiev O.O., Makarenko Ya.V., & Buhaienko Ye.S. (2011). Experimental investigation of reinforced concrete beams with defects and damages that cause the skew bending. Academic journal. Industrial Machine Building, Civil Engineering, 1(29), 87-92.  https://reposit.nupp.edu.ua/handle/PoltNTU/8074
Ibrahim, A. M., & Mahmood, M. S. (2009). Finite element modeling of reinforced concrete beams strengthened with FRP laminates. European Journal of Scientific Research, 30(4), 526-541. https://www.researchgate.net/publication/242163873_Finite_Element_Modeli... rengthened_with_FRP_Laminates
Tjitradi, D., Eliatun, E., & Taufik, S. (2017). 3D ANSYS numerical modeling of reinforced concrete beam behavior under different collapsed mechanisms. International Journal of Mechanics and Applications, 14-23. DOI: 10.5923/j.mechanics.20170701.02
Hasan, K., Alam, M. M., Mahzuz, H. M. A., & Hasan, K. FE simulation of reinforced concrete beam using ansys for several patterns of shear reinforcement. Advances in Civil Engineering (ICACE 2020).https://www.researchgate.net/publication/351514723_FE_SIMULATION_OF_REIN... REINFORCEMENT
Krasnitskyi, P., Lobodanov, M., & Blikharskyy, Z. (2024). Analysis of software packages applying  in the investigation of the damage effect to reinforced concrete beams on strength and deformability: the review. Theory and Building Practice, 6(1), 61-68 https://doi.org/10.23939/jtbp2024.01.061 
https://doi.org/10.23939/jtbp2024.01.061
Lobodanov, M., Vegera, P., & Blikharskyy, Z. (2021). Investigation of the influence of damage of the compressed concrete zone in bending rectangular reinforced concrete elements with insufficient reinforcement. Building construction: Bulletin of the Odessa State Academy of Civil Engineering and Architecture, 82, 47-55. http://visnyk-odaba.org.ua/2021-82/82-5.pdf
https://doi.org/10.31650/2415-377X-2021-82-47-55
Lobodanov, M., Vegera, P., & Blikharskyy, Z. (2021). Determination of the bearing capacity of reinforced concrete beams with damage under load. SCIENCE & CONSTRUCTION, 26(4), 26-32 https://doi.org/10.33644/scienceandconstruction.v26i4.3
https://doi.org/10.33644/scienceandconstruction.v26i4.3
Blikharskyy, Z. Z., Vegera, P. І.,  Shnal, T.M. (2018). Іnfluence of defects of the working rebar on the bearing capacity of the reinforced concrete beams. Bulletin of the National University "Lviv Polytechnic":Theory and Practice of Construction, 888, 12-17. https://science.lpnu.ua/sctp/all-volumes-and-issues/volume-888-2018-1/in...
Lobodanov, M., Vegera, P., Blikharskyy, Z., & Karpushyn.A. (2022). Theoretical analysis and experimental investigation of the defects in the compressed zone of the reinforced concrete elements. Theory and Building Practice, 4(1), 94-102. https://doi.org/10.23939/jtbp2022.01.094
https://doi.org/10.23939/jtbp2022.01.094
Klymenko,Ye.V., Antoniuk, N.R., & Polianskyi, K.V. (2019). Modeling the work of damaged reinforced concrete beams in the SC "LIRA-SAPR". Bulletin of the Odessa State Academy of Construction and Architecture, 77, 58-65. http://dx.doi.org/10.31650/2415-377X-2019-77-58-65
https://doi.org/10.31650/2415-377X-2019-77-58-65
Klymenko Y., Kos Z., Grynyova I., and Polianskyi K. (2021). Investigation of Residual Bearing Capacity of Inclined Sections of Damaged Reinforced Concrete Beams.  Croatian Regional Development Journal, 1 (1), 14-26. https://doi.org/10.2478/crdj-2021-0002
https://doi.org/10.2478/crdj-2021-0002
Pavlikov A.M., Harkava O.V., Hasenko A.V., & Andriiets K.I. (2019). Comparative analysis of numerical simulation results of work of biaxially bended reinforced concrete beams with experimental data. Building construction: Bulletin of the Odessa State Academy of Civil Engineering and Architecture, 77, 84-92. https://doi.org/10.31650/2415-377X-2019-77-84-92
https://doi.org/10.31650/2415-377X-2019-77-84-92
Kos, Z., Klymenko, Y., Karpiuk, I., & Grynyova, I.(2022). Bearing Capacity near Support Areas of Continuous Reinforced Concrete Beams and High Grillages. Appl. Sci., 12, 685.  https://doi.org/10.3390/app12020685.
https://doi.org/10.3390/app12020685
Mykhalevskyi, N.A., Vegera, P.І., & Blikharskyy, Z.Y. (2023). Analysis of the effect of uneven damage of reinforced concrete beam using the FEMAP software package. Modern construction and architecture, 6, 54-61. http://visnyk-odaba.org.ua/2023-06/6-6.pdf
https://doi.org/10.31650/2786-6696-2023-6-54-61
Deineka, V., Vegera, P., & Blikharskyy, Z. (2024). Simulation influence of uneven damage of reinforced concrete beam in LIRA-FEM. Theory and Building Practice, 6(1), 130-140. https://doi.org/10.23939/jtbp2024.01.130
https://doi.org/10.23939/jtbp2024.01.130
Barabash, M. (2018). Some aspects of modelling nonlinear behaviour of reinforced concrete. Strength of Materials and Theory of Structures, 100, 164-171. http://nbuv.gov.ua/UJRN/omts_2018_100_15
Gorodetsky, D., & Romashkina, M. (2023). Nonlinearity in LIRA-CAD. Retrieved from  https://help.liraland.com/uk-ua/high-technology-innovations/nonlinearity...
Shakhmov, Z., & Shamil, A.(2022). Nonlinear calculation of beam reinforcement using the finite element method. Technobius, 2(1), 0011. https://doi.org/10.54355/tbus/2.1.2022.0011
https://doi.org/10.54355/tbus/2.1.2022.0011
Ministry of Development and Territories of Ukraine. (2020). Concrete and reinforced concrete structures. Basic provisions (DBN V.2.6-98:2009, with Amendment No. 1).
 https://e-construction.gov.ua/laws_detail/3200410998024438840?doc_type=2
Ministry of Regional Development of Ukraine. (2011). Buildings and structures. Concrete and reinforced concrete structures of heavy concrete. Design rules (DSTU B V.2.6-156:2010). https://dnaop.com/html/60736_2.html