Structural Engineering and Mechanics

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Numerical study on the moment capacity of zed-section purlins under uplift loading

  • Zhu, Jue (Faculty of Mechanical Engineering and Mechanics, Ningbo University) ;
  • Chen, Jian-Kang (Faculty of Mechanical Engineering and Mechanics, Ningbo University) ;
  • Ren, Chong (School of Civil Engineering, University of Birmingham)
  • Received : 2013.05.22
  • Accepted : 2013.08.16
  • Published : 2014.01.25
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Abstract

In this paper a nonlinear finite element analysis model is established for cold-formed steel zed-section purlins subjected to uplift loading. In the model, the lateral and rotational restraints provided by the sheeting to the purlin are simplified as a lateral rigid restraint imposed at the upper flange-web junction and a rotational spring restraint applied at the mid of the upper flange where the sheeting is fixed. The analyses are performed by considering both geometrical and material nonlinearities. The influences of the rotational spring stiffness and initial geometrical imperfections on the uplift loading capacity of the purlin are investigated numerically. It is found that the rotational spring stiffness has significant influence on the purlin performance. However, the influence of the initial geometric imperfections on the purlin performance is found only in purlins of medium or long length with no or low rotational spring stiffness.

Keywords

References

  1. EN 1993-1-3 (2006), Eurocode 3 - design of steel structures - Part 1-3: general rules - supplementary rules for cold-formed members and sheeting, BSI.
  2. Hancock, G.J., Celeban, M., Healy, C., Georgiou, P.N. and Ings, N.L. (1990), "Tests of purlins with screw fastened sheeting under wind uplift", Tenth International Speciality Conference on Cold-formed Steel Structures, St. Louis, Missouri, USA.
  3. Katnam, K.B., van Impe, R., Lagae, G. and De Strycker, M. (2007a), "A theoretical numerical study of the rotational restraint in cold-formed steel single skin purlin-sheeting systems", Comput. Struct., 85, 1185-1193. https://doi.org/10.1016/j.compstruc.2006.11.027
  4. Katnam, K.B., van Impe, R., Lagae, G. and De Strycker, M. (2007b), "Modelling of cold-formed steel sandwich purlin-sheeting systems to estimate the rotational restraint", Thin Walled Struct., 45, 584-590. https://doi.org/10.1016/j.tws.2007.04.010
  5. Li, L.Y. (2004), "Lateral-torsional buckling of cold-formed zed-purlins partial-laterally restrained by metal sheeting", Thin Walled Struct., 42(7), 995-1011. https://doi.org/10.1016/j.tws.2004.03.005
  6. Li, L.Y. and Chu, X.T. (2007), Cold-formed Steel Sections, Eds. Martin, L.H. and Purkiss, J.A., Structural Design of Steelwork, Elsevier, Oxford.
  7. Li, L.Y. (2010), "Calculation of moment capacity of cold-formed steel members", Int. J. of Struct. Eng., 2(2), 101-115.
  8. Li, L.Y., Ren, C. and Yang, J. (2012), "Theoretical analysis of partially restrained zed-purlin beams subjected to up-lift loads", J Constr. Steel Res., 70 , 273-279. https://doi.org/10.1016/j.jcsr.2011.08.014
  9. Lucas, R.M., Al-Bermani, G.A. and Kitiporchai, S. (1997), "Modelling of cold-formed purlin- sheeting systems - Part 1: full model", Thin Walled Struct., 27(3), 223-243. https://doi.org/10.1016/S0263-8231(96)00038-9
  10. Lucas, R.M., Al-Bermani, G.A. and Kitiporchai, S. (1997), "Modelling of cold-formed purlin- sheeting systems - Part 2: simplified model", Thin Walled Struct., 27(4), 263-286. https://doi.org/10.1016/S0263-8231(96)00039-0
  11. Pekoz, T. and Soroushian, P. (1982), Behaviour of C and Z-purlins under wind uplift, Sixth International Specialty Conference on Cold-formed Steel Structures, St. Louis, Missouri, USA.
  12. Ren, C., Li, L.Y. and Yang, J. (2012), "Bending analysis of partially restrained channel-section purlins subjected to up-lift loads", J. Constr. Steel Res., 72, 254-260. https://doi.org/10.1016/j.jcsr.2012.01.001
  13. Rhodes, J. and Lawson, R.M. (1992), Design of Structures Using Cold-formed Steel Sections, SCI Publication, 089, The Steel Construction Institute.
  14. Roger, C.A. and Schuster, R.M. (1997), "Flange/web distortional buckling of cold-formed steel sections in bending", Thin Walled Struct., 27(1), 13-29. https://doi.org/10.1016/0263-8231(96)00017-1
  15. Rousch, C.J. and Hancock, G.J. (1997), "Comparison of tests of bridged and unbridged purlins with a nonlinear analysis model", J. Constr. Steel Res., 41(2/3), 197-220. https://doi.org/10.1016/S0143-974X(97)00004-7
  16. Sokol, L. (1996), "Stability of cold formed purlins braced by steel sheeting", Thin Walled Struct., 25(4), 247-268. https://doi.org/10.1016/0263-8231(95)00056-9
  17. Svensson, S.E. (1985), "Lateral buckling of beams analysed as elastically supported columns subject to a varying axial force", J. Constr. Steel Res., 5, 179-193. https://doi.org/10.1016/0143-974X(85)90002-1
  18. Toma, T., and Wittemann, K. (1994), "Design of cold-formed purlins and rails restrained by sheeting", J. Constr. Steel Res., 31, 149-168. https://doi.org/10.1016/0143-974X(94)90008-6
  19. Vrany, T. (2006), "Effect of loading on the rotational restraint of cold -formed purlins", Thin-Walled Struct.,44 (12), 1287-1292. https://doi.org/10.1016/j.tws.2007.01.004
  20. Vieira, Jr L.C.M., Malite, M. and Schafer, B.W. (2010), "Simplified models for cross-section stress demands on C-section purlins in uplift", Thin Walled Struct., 48, 33-41. https://doi.org/10.1016/j.tws.2009.07.009
  21. Ye, Z.M., Kettle, R. and Li, L.Y. (2004), "Analysis of cold-formed zed-purlins partially restrained by steel sheeting", Comput. Struct., 82, 731-739. https://doi.org/10.1016/j.compstruc.2004.02.010
  22. Ye, Z.M., Kettle, R., Li, L.Y. and Schafer, B. (2002), "Buckling behaviour of cold-formed zed- purlins partially restrained by steel sheeting", Thin Walled Struct., 40, 853-864. https://doi.org/10.1016/S0263-8231(02)00029-0

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