AbstractAbout AuthorsReferences
During the manufacturing, transportation, installation and operation of reinforced concrete bendable elements, various defects and damages may occur, such as normal cracks in the stretched zone and local horizontal cracks in the concrete of the compressed zone. Cracks are formed as a result of a violation of manufacturing technology or normal operating conditions of structures, as well as due to the combined action of loads and adverse external factors. The main issue arising as a result of numerous surveys and technical diagnostics of the structures of buildings and facilities in operation is the need to assess the actual stress-strain state of reinforced concrete bendable elements with defects and damages. The purpose of the presented study is to improve the methodology for calculating reinforced concrete beams with cracks. Experimental and theoretical studies have been carried out to study the effects of various types of cracks on the stress-strain state of the structure. To establish the effect of defects on the bearing capacity and deformations of reinforced concrete bendable elements, a physical experiment and numerical studies of beams with normal and horizontal cracks were carried out. At the same time, control samples of beams without defects and damages with similar geometric dimensions, rebar class and diameter, and concrete class were manufactured and tested. Experimental samples were tested before destruction as single-span beams loaded with two concentrated forces. As part of the numerical experiment, the simulation of reinforced concrete beams with various cracks and the study of their stress-strain state using the software package “SCAD Office” were carried out. The results of physical and numerical experiments are presented. The analysis of the influence of various cracks and their parameters on the bearing capacity of reinforced concrete beams, with varying values of concrete strength and cross-section reinforcement coefficient, is presented.
M.A. ORLOVA1, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
L.Yu. GNEDINA2, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
А.М. IBRAGIMOV2, Doctor of Sciences (This email address is being protected from spambots. You need JavaScript enabled to view it.)
L.Yu. GNEDINA2, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
А.М. IBRAGIMOV2, Doctor of Sciences (This email address is being protected from spambots. You need JavaScript enabled to view it.)
1 Ivanovo State Polytechnic University (21, Sheremetyevo Avenue, Ivanovo, 153000, Russia)
2 National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)
1. Aloyan R.M., Ibragimov A.M., Lopatin A.N., Gushchin A.V. Monitoring of the state of zero-cycle structures of a multi-storey residential building after a long break. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2015. No. 2, pp. 28–30. (In Russian).
2. Ibragimov A.M., Lopatin A.N., Gushchin A.V., Vinograi E.A. Technical diagnostics of the zero cycle of a 17-storey residential building with parking in Ivanovo. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2014. No. 1–2, pp. 48–51. (In Russian).
3. Ibragimov A.M., Semenov A.S. Dependence between physical wear and technical condition of elements of buildings of housing stock. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2014. No. 7, pp. 53. (In Russian).
4. Ibragimov A.M., Lopatin A.N.A.N., Gushchin A.V. Constructive solutions and technical diagnostics of the NARPIT building. Promyshlennoe i grazhdanskoe stroitel’stvo. 2008. No. 9, pp. 39–41. (In Russian).
5. Fedosov S.V., Ibragimov A.M., Gushchin A.V. The effect of heat and moisture treatment on the strength of reinforced concrete enclosing structures and products. Stroitel’nye Materialy [Construction Materials]. 2006. No. 9, pp. 7–8. (In Russian).
6. Orlova M.A. Tests of reinforced concrete beams with initial cracks. Part 1. Setting up and conducting an experiment. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2010. No. 8, pp. 39–42. (In Russian).
7. Orlova M.A. Testing of reinforced concrete beams with initial cracks. Part 2. The results of the experiment. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2010. No. 9, pp. 38–42. (In Russian).
8. Orlova M.A. Experimental studies of the strength of reinforced concrete beams with cracks. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2015. No. 12, pp. 33–37. (In Russian).
9. Tamrazyan A.G., Orlova M.A. Experimental studies of the stress-strain state of reinforced concrete bent elements with cracks. Modern problems of calculation of reinforced concrete structures, buildings and structures for emergency impacts: collection of reports of the International Scientific Conference. Moscow: NIU MGSU. 2016, pp. 507–514. (In Russian).
10. Tamrazyan A.G., Orlova M.A. Experimental studies of the stress-strain state of reinforced concrete bending elements with cracks. Vestnik TGASU. 2015. No. 6, pp. 98–105. (In Russian).
11. Tamrazyan A.G., Orlova M.A. o the residual bearing capacity of reinforced concrete beams with cracks. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2015. No. 6, pp. 32–34. (In Russian).
12. Orlova M.A. Reinforced concrete beams with initial normal cracks in the stretched zone. The information environment of the university. Materials of the XXIV International Scientific and Technical Conference. Ivanovo: IVGPU. 2017, pp. 359–362. (In Russian).
13. Tamrazyan A.G., Orlova M.A. On the question of the bearing capacity of reinforced concrete beams with initial defects. Modern methods of calculation of reinforced concrete and stone structures by limiting conditions: collection of reports of the International scientific and practical conference “Loleitov readings-150”. Moscow: MISI–MGSU. 2018, pp. 423–428. (In Russian).
14. Orlova M.A. Method of calculating the bearing capacity of reinforced concrete beams with initial cracks. Engineering and Social systems: Collection of scientific papers of the Institute of Civil Engineering of the IVSPU. Ivanovo. 2018. Iss. 3, pp. 27–31. (In Russian).
15. Orlova M.A. Calculation of reinforced concrete bendable elements with initial cracks using empirical coefficients. Engineering and Social systems: Collection of scientific papers of the Institute of Civil Engineering of the IVSPU. Ivanovo. 2018. Iss. 3, pp. 31–34. (In Russian).
16. Orlova M.A. Bearing capacity of reinforced concrete beams with normal and horizontal cracks. Engineering and Social Systems: collection of scientific and methodological works of the Institute of Architecture, Construction and Transport of the IVSPU. Ivanovo: IVGPU. 2021. Iss. 6, pp. 59–63. (In Russian).
17. Tamrazyan A.G., Orlova M.A. Finite element study of the stress-strain state of reinforced concrete beams with normal cracks. Nauchnoe obozrenie. 2016. No. 6, pp. 8–11. (In Russian).
18. Kukushkin I.S., Orlova M.A. Investigation of the stress-strain state of reinforced concrete beams with cracks in the VC “SCAD Office” v. 21. International Journal for Computational Civil and Structural Engineering (IJCCSE). Moscow: ASV. 2016. Vol. 12. No. 1, pp. 103–109.
19. Orlova M.A. Modeling and calculation of bent reinforced concrete structures with initial defects in the software package “SCAD Office”. Object-spatial design of unique buildings and structures: a collection of materials of the I scientific and practical forum “SMARTBUILD”, dedicated to the 100th anniversary of construction education in the Ivanovo region and the creation of the Faculty of Civil Engineering of the Ivanovo-Voznesensky Polytechnic Institute. Ivanovo: IVGPU. 2018, pp. 84–89. (In Russian).
20. Orlova M.A. Numerical studies of reinforced concrete bendable elements with initial normal cracks. Engineering and Social Systems: collection of scientific papers of the Institute of Architecture, Construction and Transport of the IVSPU. Ivanovo: IVGPU. 2019. Iss. 4, pp. 12–14. (In Russian).
2. Ibragimov A.M., Lopatin A.N., Gushchin A.V., Vinograi E.A. Technical diagnostics of the zero cycle of a 17-storey residential building with parking in Ivanovo. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2014. No. 1–2, pp. 48–51. (In Russian).
3. Ibragimov A.M., Semenov A.S. Dependence between physical wear and technical condition of elements of buildings of housing stock. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2014. No. 7, pp. 53. (In Russian).
4. Ibragimov A.M., Lopatin A.N.A.N., Gushchin A.V. Constructive solutions and technical diagnostics of the NARPIT building. Promyshlennoe i grazhdanskoe stroitel’stvo. 2008. No. 9, pp. 39–41. (In Russian).
5. Fedosov S.V., Ibragimov A.M., Gushchin A.V. The effect of heat and moisture treatment on the strength of reinforced concrete enclosing structures and products. Stroitel’nye Materialy [Construction Materials]. 2006. No. 9, pp. 7–8. (In Russian).
6. Orlova M.A. Tests of reinforced concrete beams with initial cracks. Part 1. Setting up and conducting an experiment. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2010. No. 8, pp. 39–42. (In Russian).
7. Orlova M.A. Testing of reinforced concrete beams with initial cracks. Part 2. The results of the experiment. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2010. No. 9, pp. 38–42. (In Russian).
8. Orlova M.A. Experimental studies of the strength of reinforced concrete beams with cracks. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2015. No. 12, pp. 33–37. (In Russian).
9. Tamrazyan A.G., Orlova M.A. Experimental studies of the stress-strain state of reinforced concrete bent elements with cracks. Modern problems of calculation of reinforced concrete structures, buildings and structures for emergency impacts: collection of reports of the International Scientific Conference. Moscow: NIU MGSU. 2016, pp. 507–514. (In Russian).
10. Tamrazyan A.G., Orlova M.A. Experimental studies of the stress-strain state of reinforced concrete bending elements with cracks. Vestnik TGASU. 2015. No. 6, pp. 98–105. (In Russian).
11. Tamrazyan A.G., Orlova M.A. o the residual bearing capacity of reinforced concrete beams with cracks. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2015. No. 6, pp. 32–34. (In Russian).
12. Orlova M.A. Reinforced concrete beams with initial normal cracks in the stretched zone. The information environment of the university. Materials of the XXIV International Scientific and Technical Conference. Ivanovo: IVGPU. 2017, pp. 359–362. (In Russian).
13. Tamrazyan A.G., Orlova M.A. On the question of the bearing capacity of reinforced concrete beams with initial defects. Modern methods of calculation of reinforced concrete and stone structures by limiting conditions: collection of reports of the International scientific and practical conference “Loleitov readings-150”. Moscow: MISI–MGSU. 2018, pp. 423–428. (In Russian).
14. Orlova M.A. Method of calculating the bearing capacity of reinforced concrete beams with initial cracks. Engineering and Social systems: Collection of scientific papers of the Institute of Civil Engineering of the IVSPU. Ivanovo. 2018. Iss. 3, pp. 27–31. (In Russian).
15. Orlova M.A. Calculation of reinforced concrete bendable elements with initial cracks using empirical coefficients. Engineering and Social systems: Collection of scientific papers of the Institute of Civil Engineering of the IVSPU. Ivanovo. 2018. Iss. 3, pp. 31–34. (In Russian).
16. Orlova M.A. Bearing capacity of reinforced concrete beams with normal and horizontal cracks. Engineering and Social Systems: collection of scientific and methodological works of the Institute of Architecture, Construction and Transport of the IVSPU. Ivanovo: IVGPU. 2021. Iss. 6, pp. 59–63. (In Russian).
17. Tamrazyan A.G., Orlova M.A. Finite element study of the stress-strain state of reinforced concrete beams with normal cracks. Nauchnoe obozrenie. 2016. No. 6, pp. 8–11. (In Russian).
18. Kukushkin I.S., Orlova M.A. Investigation of the stress-strain state of reinforced concrete beams with cracks in the VC “SCAD Office” v. 21. International Journal for Computational Civil and Structural Engineering (IJCCSE). Moscow: ASV. 2016. Vol. 12. No. 1, pp. 103–109.
19. Orlova M.A. Modeling and calculation of bent reinforced concrete structures with initial defects in the software package “SCAD Office”. Object-spatial design of unique buildings and structures: a collection of materials of the I scientific and practical forum “SMARTBUILD”, dedicated to the 100th anniversary of construction education in the Ivanovo region and the creation of the Faculty of Civil Engineering of the Ivanovo-Voznesensky Polytechnic Institute. Ivanovo: IVGPU. 2018, pp. 84–89. (In Russian).
20. Orlova M.A. Numerical studies of reinforced concrete bendable elements with initial normal cracks. Engineering and Social Systems: collection of scientific papers of the Institute of Architecture, Construction and Transport of the IVSPU. Ivanovo: IVGPU. 2019. Iss. 4, pp. 12–14. (In Russian).
For citation: Orlova M.A., Gnedina L.Yu., Ibragimov А.М. Assessment of the condition of reinforced concrete bendable elements with defects and damages.Part 1. Experimental studies. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2022. No. 1–2, pp. 28–33. (In Russian). DOI: https://doi.org/10.31659/0044-4472-2022-1-2-28-33