Steel and Composite Structures

  • 제43권4호
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  • Pages.511-522
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  • 2022
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Determination of slip modulus of cold-formed steel composite members sheathed with plywood structural panels

  • Karki, Dheeraj (School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney (UTS)) ;
  • Far, Harry (School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney (UTS)) ;
  • Al-hunity, Suleiman (School of Civil and Environmental Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney (UTS))
  • 투고 : 2021.10.20
  • 심사 : 2022.02.26
  • 발행 : 2022.05.25
⟨ 이전 논문 다음 논문 ⟩

초록

An experimental investigation to study the behaviour of connections between cold-formed steel (CFS) joist and plywood structural panel is presented in this paper. Material testing on CFS and plywood was carried out to assess their mechanical properties and behaviour. Push-out tests were conducted to determine the slip modulus and failure modes of three different shear connection types. The employed shear connectors in the study were; size 14 (6mm diameter) self-drilling screw, M12 coach screw, and M12 nut and bolt. The effective bending stiffness of composite cold-formed steel and plywood T-beam assembly is calculated based on the slip modulus values computed from push-out tests. The effective bending stiffness was increased by 25.5%, 18% and 30.2% for self-drilling screw, coach screw, nut and bolt, respectively, over the stiffness of cold-formed steel joist alone. This finding suggests the potential to enhance the structural performance of composite cold-formed steel and timber flooring system by mobilisation of composite action present between timber sheathing and CFS joist.

키워드

과제정보

The authors would like to thank Peter Brown of the UTS tech lab for providing guidance throughout the testing.

참고문헌

  1. British Standard (1991), BS EN 26891:1991 Timber StructuresJoints Made with Mechanical Fasteners.
  2. Cen (2004), EN 1995-1-1:2004 Eurocode 5: Design of Timber Structures-Part 1-1: General-Common Rules and Rules for Buildings. European Committee for Standardization.
  3. Cen 2005. BS EN 12512 Timber structures-Test methods-Cyclic testing of joints made with mechanical fasteners. European Committee for Standardization.
  4. Couchman, G.H. (2016), Minimum Degree of Shear Connection Rules for UK Construction to Eurocode 4. Steel Construction Institute.
  5. Far, H. (2019), "Dynamic behaviour of unbraced steel frames resting on soft ground", Steel Construct., 12(2), 135-140. https://doi.org/10.1002/stco.201800003.
  6. Far, H. (2020), "Flexural behavior of cold-formed steel-timber composite flooring systems", J. Struct. Eng., 146, 06020003. https://doi.org/10.1061/(ASCE)ST.1943-541X.0002600.
  7. Hassanieh, A., Valipour, H.R. and Bradford, M.A. (2016), "Loadslip behaviour of steel-cross laminated timber (CLT) composite connections", J. Construct. Steel Res., 122, 110-121. https://doi.org/10.1016/j.jcsr.2016.03.008.
  8. Hassanieh, A., Valipour, H.R. and Bradford, M.A. (2017), "Composite connections between CLT slab and steel beam: Experiments and empirical models", J. Construct. Steel Res., 138, 823-836. https://doi.org/10.1016/j.jcsr.2017.09.002.
  9. Johnson, R.P. and Molenstra, N. (1991), "Partial shear connection in composite beams for buildings", Proceedings - Institution of Civil Engineers. Part 2. Research and theory, 91, 679-704. https://doi.org/10.1680/iicep.1991.17485
  10. Karki, D. and Far, H. (2021), "State of the art on composite coldformed steel flooring systems", Steel Construct., 14(2). 127. https://doi.org/10.1002/stco.202000026.
  11. Karki, D., Far, H. and Saleh, A. (2021), "Numerical studies into factors affecting structural behaviour of composite cold-formed steel and timber flooring systems", J. Build. Eng., 102692.
  12. Kyvelou, P., Gardner, L. and Nethercot, D.A. (2017), "Testing and analysis of composite cold-formed steel and wood-based flooring systems", J. Struct. Eng., 143(11), 04017146. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001885.
  13. Kyvelou, P., Gardner, L. and Nethercot, D.A. (2018), "Finite element modelling of composite cold-formed steel flooring systems", Eng. Struct., 158, 28-42. https://doi.org/10.1016/j.engstruct.2017.12.024.
  14. Lakkavalli, B.S. and Liu, Y. (2006), "Experimental study of composite cold-formed steel C-section floor joists", J. Construct. Steel Res., 62, 995-1006. https://doi.org/10.1016/j.jcsr.2006.02.003.
  15. Li, Y., Shen, H., Shan, W. and Han, T. (2012), "Flexural behavior of lightweight bamboo-steel composite slabs", Thin-Walled Struct., 53, 83-90. https://doi.org/10.1016/j.tws.2012.01.001.
  16. Loss, C. and Davison, B. (2017), "Innovative composite steeltimber floors with prefabricated modular components", Eng. Struct., 132, 695-713. https://doi.org/10.1016/j.engstruct.2016.11.062.
  17. Originpro-Graphing and Analysis Tool (2021), OriginPro, Version number 2021. OriginLab Corporation, Northampton, MA, USA.
  18. Parnell, R., Davies, B. W. and Xu, L. (2010), "Vibration performance of lightweight cold-formed steel floors", J. Struct. Eng., 136, 645-653. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000168.
  19. Saleh, A., Far, H. and Mok, L. (2018), "Effects of different support conditions on experimental bending strength of thin walled cold formed steel storage upright frames", J. Construct. Steel Res., 150, 1-6. https://doi.org/10.1016/j.jcsr.2018.07.031.
  20. Standard Australia (1996), AS1393:1996 Coach Screws-Metric Series with ISO Hexagon Heads. SAI Global.
  21. Standard Australia (2000), AS1110.1-2000 ISO Metric Hexagon Bolts and Screws, SAI Global.
  22. Standard Australia (2002), AS3566.1-2002: Self-Drilling Screws for Buidling and Construction Industries-Part 1. SAI Global.
  23. Standard Australia (2007), AS 1391-2007 Metallic Materials - Tensile Testing at Ambient Temperature. Standard Australia: SAI Global.
  24. Standard Australia (2012), AS/NZS 2269.1:2012 PlywoodStructural, Part 1: Determination of Structural Properties-Test Methods. Australia: SAI Global.
  25. Steinberg, E., Selle, R. and Faust, T. (2003), "Connectors for timber-lightweight concrete composite structures", J. Struct. Eng., 129, 1538-1545. https://doi.org/10.1061/(ASCE)0733-9445(2003)129:11(1538)
  26. Tabatabaiefar, H..R., Mansoury, B., Khadivi Zand, M.J. and Potter, D. (2017), "Mechanical properties of sandwich panels constructed from polystyrene/cement mixed cores and thin cement sheet facings", J. Sandwich Struct. Mater., 19(4), 456-481. https://doi.org/10.1177/1099636215621871
  27. Wang, L. and Young, B. (2014), "Design of cold-formed steel channels with stiffened webs subjected to bending", ThinWalled Structures, 85, 81-92. https://doi.org/10.1016/j.tws.2014.08.002.
  28. Xu, L. and Tangorra, F.M. (2007), "Experimental investigation of lightweight residential floors supported by cold-formed steel Cshape joists", J. Construct. Steel Res., 63, 422-435. https://doi.org/10.1016/j.jcsr.2006.05.010.
  29. Zhou, X., Shi, Y., Xu, L., Yao, X. and Wang, W. (2019), "A simplified method to evaluate the flexural capacity of lightweight cold-formed steel floor system with oriented strand board subfloor", Thin-Walled Struct., 134, 40-51. https://doi.org/10.1016/j.tws.2018.09.006.