Influence of initial deflection of profiled deck on the strength of steel-reinforced concrete floor slab during operation

Introduction. Currently, composite structures are a rapidly developing and promising area of monolithic reinforced concrete construction. The increasing use of combined structures and some features of their resistance at the stages of manufacture and operation arouse the natural interest of researchers in establishing the real stress-strain state at all stages of the life cycle of the structure. The aim of the work was to study the effect of the initial deflection of the profiled sheeting at the concreting stage on the strength of composite slabs at the operation stage. The object of the study was single-span orthotropic composite floor slabs made on permanent formwork in the form of profiled sheeting grades H75, H144, H153 according to GOST 24045–2016 and TRP200 according to GOST R 52246, 0.7–0.9 mm thick. The subject of the study was the strength of the composite slab, taking into account the pre-operational state of the structure.

Materials and methods. The study used a calculation and analytical research method based on regulatory documents in force in the Russian Federation.

Results. The values of additional bending moments and shear forces in composite slabs at the operational stage caused by the primary deflection of the corrugated sheet at the concreting stage were determined. The dependences of the acting forces on the span dimensions and the useful load value for various grades of corrugated sheets were revealed. The analysis of the research results was implemented in graphical and tabular forms. The data obtained for the most common grades of corrugated sheets and slab spans at various load levels indicate the need to increase the working reinforcement of the slabs in relation to the initial reinforcement.

Conclusions. Based on the results of the study, a conclusion was made on the need to carry out clarifying strength calculations, taking into account the geometric nonlinearity of the structure, at the operational stage due to the overload of the corrugated sheet with concrete mix during concreting due to the development of initial deflections. With slab spans greater than 3.5 m and useful loads over 3 kPa, the deflection at the concreting stage due to the action of the increased weight of the concrete mix leads to the need to install additional longitudinal reinforcement in the ribs of the slab. The obtained data can be used in the design of composite concrete floor slabs and in assessing the technical condition of composite concrete slabs.

1. Babalich V.S., Androsov E.N. Steel-reinforced concrete structures and the prospect of their application in the construction practice of Russia. Advances in Modern Science. 2017; 4(4):205-208. EDN YROOWX. (rus.).

2. Nikulina O.V. Cymdjankina N.Ju. Analysis of structural solutions for steel-reinforced concrete floors. Orenburg horizons: past, present, future : collection of materials of the All-Russian scientific and practical conference dedicated to the 275th anniversary of the Orenburg province and the 85th anniversary of the Orenburg region. 2019; 157-161. EDN WBTOMY. (rus.).

3. Tusnin А.R., Myl’nikov I.V. Quick-assembly units in steel frames of multi-storey buildings. Vestnik MGSU [Monthly Journal on Construction and Architecture]. 2024; 19(6):942-959. DOI: 10.22227/1997-0935.2024.6.942-959. EDN KXXGCG. (rus.).

4. Budoshkina K.A., Kuznetsov V.S., Murlysheva Y.A., Ulyamaev A.S., Shaposhnikova Y.A. Analysis of the operation of combined beams in a wide range of loads. Engineering journal of Don. 2018; 2(49):169. EDN YATGDB. (rus.).

5. Lu L., Ding Y., Guo Ya., Hao H., Ding S. Flexural performance and design method of the prefabricated RAC composite slab. Structures. 2022; 38:572-584. DOI: 10.1016/j.istruc.2022.02.022

6. Yao G., Chen Y., Yang Y., Ma X., Men W. Investigation on buckling performance of prefabricated light steel frame materials under the action of random defects during construction. Materials. 2023; 16(16):5666. DOI: 10.3390/ma16165666

7. Tamrazyan A.G., Arutyunyan S.N. Investigation of initial stresses and deflections of profiled deck arising during the construction of composite floor slabs. The Safety of the construction Fund of Russia. Problems and solutions. 2017; 1:139-146. EDN ZXNSCX. (rus.).

8. Zamaliev F.S., Tamrazyan A.G. To calculation of steel-reinforced concrete ribbed plates for refurbished floors. Building and Reconstruction. 2021; 5(97):3-15. DOI: 10.33979/2073-7416-2021-97-5-3-15. EDN BDUMYX.(rus.).

9. Bedov A., Shaposhnikova Yu. Bearing capacity of steel-reinforced concrete floor elements before the operation period. Magazine of Civil Engineering. 2024; 1(125). DOI: 10.34910/MCE.125.1. EDN HBTNSM.

10. Shaposhnikova Yu.A. Analysis of the influence of various factors on the deflections of profiled flooring during slab concreting. Engineering journal of Don. 2024; 5(113):551-568. EDN CORURC. (rus.).

11. Shaposhnikova Yu.A. The influence of various factors on the deflections and strength of profiled sheeting at the stage of concreting a steel-reinforced concrete slab. Reinforced Concrete Structures. 2024; 7(3):44-53. DOI: 10.22227/2949-1622.2024.3.44-53. EDN DADHLD. (rus.).

12. Urgalkina D.A. Application of deformation model to calculation of reinforced concrete lines on steel profile sheet. World Science. 2019; 6(27):527-531. EDN KGJGTY. (rus.).

13. Zulpuev A.M., Abdullaev U.D., Iranova N.A., Kochkonbaev B.A., Kenzhebaeva B.P. Calculation of strength and movement of slabs steel profiled deckings under local loads. In the World of Science and Education. 2025; 1:150-159. DOI: 10.24412/3007-8946-2025-152-150-159. EDN SPRPNZ.

14. Kuznetsov V., Shaposhnikova Yu. Features of calculation and design of complex concrete monolithic slabs. MATEC Web of Conferences. 2018; 251:02027. DOI: 10.1051/matecconf/201825102027

15. Albarram A., Qureshi J., Abbas A. Effect of Rib Geometry in Steel–Concrete Composite Beams with Deep Profiled Sheeting. International Journal of Steel Structures. 2020; 20(3):931-953. DOI: 10.1007/s13296-020-00333-5

16. Chaparanganda E., Lazouski D. Design method for cast in-situ floor slab with external profiled steel deck as reinforcement. Architectural and construction complex: problems, prospects, innovations. 2024; 73-83. EDN HCQRUF. (rus.).

17. Vasdravellis G., Uy B., Tan E.L., Kirkland B. Behaviour and design of composite beams subjected to sagging bending and axial compression. Journal of Constructional Steel Research. 2015; 110:29-39. DOI: 10.1016/j.jcsr.2015.03.010

18. Almazov V.O., Harutyunyan S.N. Design of Composite Reinforced Concrete Slabs according to Eurocode 4 and Russian Recommendations. Vestnik MGSU [Proceedings of Moscow State University of Civil Engineering]. 2015; 8:51-65. EDN UGUISR. (rus.).

19. Ahmed I.M., Tsavdaridis K.D. The evolution of composite flooring systems: applications, testing, modelling and Eurocode design approaches. Journal of Constructional Steel Research. 2019; 155:286-300. DOI: 10.1016/j.jcsr.2019.01.007

20. Konrad M., Kuhlmann U. Headed studs used in trapezoidal steel sheeting according to Eurocode 4. Structural Engineering International. 2009; 19(4):420-426. DOI: 10.2749/101686609789847118

21. Dujmovic D., Androić B., Lukačević I. Hoesch Additive Floor. Composite Structures According to Eurocode 4. 2014; 797-824. DOI: 10.1002/9783433604908.ch22

22. Alsharari F., El-Zohairy A., Salim H., El-Sisi A.E. Numerical investigation of the monotonic behavior of strengthened Steel-Concrete composite girders. Engineering Structures. 2021; 246:113081. DOI: 10.1016/j.engstruct.2021.113081

23. Tamayo J.L.P., Franco M.I., Morsch I.B., Désir J.M., Wayar A.M.M. Some aspects of numerical modeling of steel-concrete composite beams with prestressed tendons. Latin American Journal of Solids and Structures. 2019; 16(7). DOI: 10.1590/1679-78255599

24. Trofimov D.S. Research of monolithic floor performance on metal beams with broken adhesion using numerical model. Young Scientist. 2022; 21(416):73-78. EDN SSRXIL. (rus.).

25. Bagaev Z.S., Borukaev B.M. Methodology for modeling a steel-reinforced concrete floor with profiled sheeting in the Lira CAD PC. Strategic development of the innovative potential of industries, complexes and organizations : collection of articles from the X International scientific and practical conference. 2022; 18-21. EDN EKDSAO. (rus.).

26. Gaiduk S.V., Chudinov Yu.N. Design models of steel-reinforced concrete floors with a monolithic plate on a steel profiled sheet. Regional aspects of the development of science and education in the field of architecture, construction, land management and cadastres at the beginning of the III millennium : proceedings of the International scientific and practical conference. 2020; 179-183. EDN XBYUSY. (rus.).

27. Gimranov L.R., Fattakhova A.I. Determination of the characteristics of the steel-reinforced concrete diaphragm model affecting the result of the numerical experiment. Industrial and Civil Engineering. 2022; 1:18-25. DOI: 10.33622/0869-7019.2022.01.18-25. EDN LEKTSZ.(rus.).

28. Reginato L.H., Tamayo J.L.P., Morsch I.B. Finite element study of effective width in steel-concrete composite beams under long-term service loads. Latin American Journal of Solids and Structures. 2018; 15(8). DOI: 10.1590/1679-78254599

29. Adamenko V., Dziubko D., Romanyshen O. Stress-strain state investigation of nodes of composite steel-reinforced concrete frame-monolithic buildings using information technology for structural analysis and building information modeling. Mechanics and Mathematical Methods. 2024; 6(1):107-123. DOI: 10.31650/2618-0650-2024-6-1-107-123

30. Tonkih G.P., Chesnokov D.A. Strength and ductility evaluation of l-shape shear connectors in composite floors. Reinforced Concrete Structures. 2024; 5(1):27-44. DOI: 10.22227/2949-1622.2024.1.27-44. EDN BUVBSZ. (rus.).

31. Tonkih G.P., Chesnokov D.A. Shear resistance of nailed connectors in composite beams with steel decking. Industrial and Civil Engineering. 2022; 7:17-23. DOI: 10.33622/0869-7019.2022.07.17-23. EDN AVBAPK. (rus.).

32. Kocherzhenko V.V., Sapozhnikov P.V., Kuz-necov V.V. Experimental planning for the perpendicular shear test of the embossment. Engineering Journal of Don. 2023; 11(107):409-425. EDN CMSRFZ. (rus.).

33. Sougata C., Umamaheswari N. Numerical investigation of steel-concrete composite beams using flexible shear connectors. AIMS Materials Science. 2022; 9(5):668-683. DOI: 10.3934/matersci.2022041

34. Hällmark R., Collin P., Hicks S.J. Post-installed shear connectors: Push-out tests of coiled spring pins vs. headed studs. Journal of Constructional Steel Research. 2019; 161:1-16. DOI: 10.1016/j.jcsr.2019.06.009

35. Farid B., Boutagouga D. Parametric study of I-shaped shear connectors with different orientations in push-out test. Frattura ed Integrità Strutturale. 2021; 15(57):24-39. DOI: 10.3221/IGF-ESIS.57.03

36. Tipka M., Macecek T., Vaskova J. Analysis of Position Effect of Vertical Load-Bearing Elements for Reinforcement of Steel Reinforced Concrete Floor Structures. Key Engineering Materials. 2024; 976:11-20. DOI: 10.4028/p-jmrgs4

37. Maceček T. Analysis of Position Effect of Vertical Load-bearing Elements for Reinforcement of Steel Reinforced Concrete Floor Structures : Bachelor Thesis. CTU in Prague, 2023.

38. Suwaed A.S.H., Karavasilis T.L. Demountable steel-concrete composite beam with full-interaction and low degree of shear connection. Journal of Constructional Steel Research. 2020; 171:106152. DOI: 10.1016/j.jcsr.2020.106152

39. Colajanni P., Mendola L.L., Monaco A. Review of push-out and shear response of hybrid steel-trussed concrete beams. Buildings. 2018; 8(10):134. DOI: 10.3390/buildings8100134

40. Pathirana S.W., Uy B., Mirza O., Zhu X. Bol-ted and welded connectors for the rehabilitation of composite beams. Journal of Constructional Steel Research. 2016; 125:61-73. DOI: 10.1016/j.jcsr.2016.06.003

41. Davidenko A.I., Davidenko M.A., Davidenko A.A., Davidenko E.V., Pushko N.I. To calculate the strength of steel concrete slabs with external reinforcement with profiled steel flooring and prestressed core reinforcement. Scientific Bulletin of the Luhansk State Agrarian University. 2023; 3-4(20-21):269-276. EDN BENCXQ. (rus.).

42. Davidenko A.I., Artemenko A.A., Borisov S.D. Assessment of fire resistance by the criterion of loss of bearing capacity of reinforced concrete floors with external reinforcement. Vestnik Lugansk Vladimir Dahl State University. 2024; 3(81):21-26. EDN ZLFGUW. (rus.).

43. Bubis A.A., Giziatullin I.R., Davidenko A.A., Petrosyan I.A., Nazmeyeva T.V., Davidenko A.I. et al. Features of the application of combined steel-reinforced concrete floors based on lightweight steel thin-walled structures in seismic-prone regions. Concrete and Reinforced Concrete. 2024; 6(625):5-19. DOI: 10.37538/0005-9889-2024-6(625)-5-19. EDN MYQGYP. (rus.).