ANALYSIS OF THE IMPACT OF CROSS-SECTION DAMAGE ON THE STRENGTH AND DEFORMABILITY OF BENT REINFORCED CONCRETE ELEMENTS

The article analyzes defects and damage in reinforced concrete structures, particularly physical, biological, and chemical, with an emphasis on the impact of prolonged operation and aggressive environmental conditions. Research shows that mechanical damage, such as spalling and potholes, significantly reduces the load-bearing capacity of structures and causes complex deformations. Relevant directions in scientific research have been identified, particularly regarding the behavior of damaged reinforced concrete beams under load, which require further development and improvement of methods for assessing residual load-bearing capacity. The article emphasizes the need for additional experimental studies and the use of modern software for more accurate methods of predicting and calculating reinforced concrete structures.

Surianinov, M., Neutov, S., & Yesvandzhyia, V. (2023). Bearing capacity of a beam damaged during combat actions strengthened with the use of fiber concrete. Spatial development, 5, 212-222. https://doi.org/10.32347/2786-7269.2023.5.212-222
https://doi.org/10.32347/2786-7269.2023.5.212-222
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
Mykhalevskyi, N. A., Vegera, P. І., & Blikharskyi, Z. Y. (2023). The influence of damage to reinforced concrete beams on strength and deformability: the review. Theory and Building Practice, 5(1), 112-119. https://doi.org/10.23939/jtbp2023.01.112  
https://doi.org/10.23939/jtbp2023.01.112
Klymenko, Ye. V., & Oreshkovych, М. (2013). On the Study of the Compressed Damaged Reinforced Concrete Elements of Circular Cross-Section. Theory and building practice, 755, 173-178. https://science.lpnu.ua/sctp/all-volumes-and-issues/volume-755-2013-1/do...
Hait, P., Arjun, S., & Satyabrata, Ch. (2018). Quantification of damage to RC structures: A comprehensive review. Disaster Advances, 11(12), 41-59. https://www.academia.edu/39813716/Quantification_of_damage_to_RC_Structu...
Krasnitskyi, P., Lobodanov, M., & Blikharskyy Z. (2024). Аnalysis 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
Klymenko, Ye. V., & Polianskyi, K. V. (2019). Experimental investigation of the stress-strain state of damaged reinforced concrete beams. Bulletin of the Odessa State Academy of Civil Engineering and Architecture, 76, 24-30. https://doi.org/10.31650/2415-377X-2019-76-24-30
https://doi.org/10.31650/2415-377X-2019-76-24-30
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
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
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
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
Pavlikov, A.M., Harkava, O. V., & Barylyak, B.A. (2019). Determination of reinforced concrete columns strength after operational damage. Bulletin of the Odessa State Academy of Civil Engineering and Architecture: Building Structures, 76, 70-77. https://reposit.nupp.edu.ua/handle/PoltNTU/7585
https://doi.org/10.31650/2415-377X-2019-76-70-77
Lobodanov, M. M., Vegera, P. І., & Blikharskyy, Z.Y. (2021). Investigation of the influence of damage of the compressed concrete zone in bending rectangular reinforced concrete elements with insufficient reinforcement. Bulletin of the Odessa State Academy of Civil Engineering and Architecture: Building Structures, 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. M., Vegera, P. І., & Blikharskyy, Z.Y. (2018). Analysis of influence of main types of defects  and damage on the bearing capasity of reinforced concrete elements. Bulletin of the National University "Lviv Polytechnic": Theory and Practice of Construction, 888, 93-100. https://science.lpnu.ua/uk/node/14929
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...
Shmyh, R. (2017). Mathematical simulation of the stressed-deformed condition of reinforced concrete beams in simultaneous influence of aggressive environment and loading. Econtechmod: An International Quarterly Journal, 6(3), 39-44. https://doi.org/10.31734/architecture2017.18.019
https://doi.org/10.31734/architecture2017.18.019
Bonić, Z., Savić, J., Topličić-Ćurčić, G., & Davidoć, N. (2015). Damage of Concrete and Reinforcement of Reinforced-Concrete Foundations Caused by Environmental Effects. Procedia Engineering, 117, 411-418. https://doi.org/10.1016/j.proeng.2015.08.187  
https://doi.org/10.1016/j.proeng.2015.08.187
Blikharskyy, Z., Selejdak, J., Blikharskyy, Y., & Khmil, R. (2019). Corrosion of reinforce bars in RC constructions. System Safety: Human-Technical Facility-Environment, 1(1), 277-283. https://doi.org/10.2478/czoto-2019-0036
https://doi.org/10.2478/czoto-2019-0036
Santos, J., & Henriques, A. (2021). Rotation capacity of corroded RC beams with special ductility tempcore rebars. Engineering Structures, 236(1), 112138. https://doi.org/10.1016/j.engstruct.2021.112138
https://doi.org/10.1016/j.engstruct.2021.112138
Royani, A., Prifiharni, S., Priyotomo, G., & Sundjono, S. (2021). Corrosion rate and corrosion behaviour analysis of carbon steel pipe at constant condensed fluid. Metallurgical and Materials Engineering, 27(4), 519-530. https://doi.org/10.30544/591
https://doi.org/10.30544/591
Xia, J., Wei-liang, J., & Li, L. (2011). Shear performance of reinforced concrete beams with corroded stirrups in chloride environment. Corrosion Science, 53(5), 1794-1805. https://doi.org/10.1016/j.corsci.2011.01.058
https://doi.org/10.1016/j.corsci.2011.01.058
Al-Saidy, A. H., Al-Harthy, A. S., Al-Jabri, K. S., Abdul-Halim, M., & Al-Shidi, N. M. (2010). Structural performance of corroded RC beams repaired with CFRP sheets. Composite Structures, 92, 1931-1938. https://doi.org/10.1016/j.compstruct.2010.01.001
https://doi.org/10.1016/j.compstruct.2010.01.001
Zhu, W., & François, R. (2013). Effect of corrosion pattern on the ductility of tensile reinforcement extracted from a 26-year-old corroded beam. Advances in Concrete Construction, 1(2), 121-136. https://doi.org/10.12989/acc2013.01.2.121
https://doi.org/10.12989/acc2013.01.2.121
Lu, Z.-H., Li, H., Li, W., Zhao, Y.-G., & Dong, W. (2018). An empirical model for the shear strength of corroded reinforced concrete beam. Construction and Building Materials, 188, 1234-1248. https://doi.org/10.1016/j.conbuildmat.2018.08.123
https://doi.org/10.1016/j.conbuildmat.2018.08.123