DOI QR코드

DOI QR Code

Numerical parametric analysis on the ultimate bearing capacity of the purlin-sheet roofs connected by standing seam clips

  • Zhang, Yingying (State Key Laboratory for Geomechanics and Deep Underground Engineering, Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology) ;
  • Song, Xiaoguang (Shandong Academy of building research) ;
  • Zhang, Qilin (College of Civil Engineering, Tongji University)
  • Received : 2016.08.02
  • Accepted : 2017.03.15
  • Published : 2017.07.25

Abstract

This paper presents the parametric numerical analysis on the ultimate bearing capacity of the purlin-sheet roofs connected by standing seam clips. The effects of several factors on failure modes and ultimate bearing capacity of the purlins are studied, including setup of anti-sag bar, purlin type, sheet thickness and connection type et al. A simplified design formula is proposed for predicting the ultimate bearing capacity of purlins. Results show that setting the anti-sag bars can improve the ultimate bearing capacity and change the failure modes of C purlins significantly. The failure modes and ultimate bearing capacity of C purlins are significantly different from those of Z purlins, in the purlin-sheet roof connected by standing seam clips. Setting the anti-sag bars near the lower flange is more favorable for increasing the ultimate bearing capacity of purlins. The ultimate bearing capacity of C purlins increases slightly with sheet thickness increasing from 0.6 mm to 0.8 mm. The ultimate bearing capacity of the purlin-sheet roofs connected by standing seam clips is always higher than those by self-drilling screws. The predictions of the proposed design formulas are relatively in good agreement with those of EN 1993-1-3: 2006, compared with GB 50018-2002.

Keywords

Acknowledgement

Supported by : Central Universities

References

  1. AISI S100 (2007), North American specification for the design of cold-formed steel structural members, American Iron and Steel Institute, Washington DC.
  2. Ali, H.M. and Senseny, P.E. (2003), "Models for standing seam roofs", J. Wind Eng. Ind. Aerod., 91, 1689-1702. https://doi.org/10.1016/j.jweia.2003.09.014
  3. Cai, J.G, Jiang, C., Deng, X.W., Feng, J. and Xu, Y.X. (2015), "Static analysis of a radially retractable hybrid grid shell in the closed position", Steel Compos. Struct., 18(6), 1391-1404. https://doi.org/10.12989/scs.2015.18.6.1391
  4. Cai, J.G., Ma, R.J., Deng, X.W. and Feng, J. (2016), "Static behavior of deployable cable-strut structures", J. Constr. Steel Res., 119, 63-75. https://doi.org/10.1016/j.jcsr.2015.12.003
  5. Cai, J.G., Xu, Y.X., Feng, J. and Zhang, J. (2012), "In-plane elastic buckling of shallow parabolic arches under an external load and temperature changes", J. Struct. Eng., ASCE, 138(11), 1300-1309. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000570
  6. Cai, J.G., Zhou, Y., Xu, Y.X. and Feng, J. (2013), "Non-linear stability analysis of a hybrid barrel vault roof", Steel Compos, Struct, 14(6), 571-586. https://doi.org/10.12989/scs.2013.14.6.571
  7. El Damatty, A.A., Rahman, M. and Ragheb, O. (2003), "Component testing and finite element modeling of standing seam roofs", Thin Wall. Struct., 41, 1053-1072. https://doi.org/10.1016/S0263-8231(03)00048-X
  8. European Committee for Standardization. EN 1993-1-3 (2006), General rules-Supplementary rules for cold-formed members and sheeting, British Standards Institution, London.
  9. Farquhar, S., Kopp, G. and Surry, D. (2005), "Wind tunnel and uniform pressure tests of a standing seam metal roof model", J. Struct. Eng., ASCE, 131(4), 650-659. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:4(650)
  10. GB 50017 (2003), Code for Design of steel structure, China Planning Press, Beijing.
  11. GB 50018 (2002), Technical codes of cold-formed thin-wall steel structures, China Planning Press, Beijing.
  12. Habte, F., Mooneghi, M.A., Chowdhury, A.G. and Irwin, P. (2015), "Full-scale testing to evaluate the performance of standing seam metal roofs under simulated wind loading", Eng. Struct., 105, 231-248. https://doi.org/10.1016/j.engstruct.2015.10.006
  13. Johnston, N. and Hancock, G. (1994), "Calibration of the AISI Rfactor design approach for purlins using Australian test data", Eng. Struct., 16, 342-347. https://doi.org/10.1016/0141-0296(94)90027-2
  14. Kachichian, M. and Dunai, L. (2012), "Purlin-cladding interaction in standing seam roofs", Period Polytech. Civil Eng., 56(1), 13-23. https://doi.org/10.3311/pp.ci.2012-1.02
  15. Katnam, K.B., Impe, V.R, Lagae, G. and Strycker, M.D. (2007), "A theoretical numerical study of the rotational restraint in coldformed steel single skin purlin-sheeting systems", Comput. Struct., 85, 1185-1193 https://doi.org/10.1016/j.compstruc.2006.11.027
  16. Liu, Y.X., Tong, G.S., Du, H.L. and Zhang, L. (2004), "Test and finite element analysis on torsional restraint of corrugated steel sheet to purlin through clips", J. Build. Struct., 35, 116-124.
  17. Lucas, R.M., Al-Bermani, F.G.A. and Kitipornchai, S. (1997), "Modelling of cold-formed purlin-sheeting system-part 2: simplified model", Thin Wall. Struct., 27, 263-286. https://doi.org/10.1016/S0263-8231(96)00039-0
  18. Mahaarachchi, D. and Mahendran, M. (2009), "Wind uplift strength of trapezoidal steel cladding with closely spaced ribs", J. Wind Eng. Ind. Aerod., 97, 140-150. https://doi.org/10.1016/j.jweia.2009.03.002
  19. Morrison, M.J. and Kopp, G.A. (2012), "Analysis of wind-induced clip loads on standing seam metal roofs", J. Struct. Eng., ASCE, 136(3), 334-337.
  20. Prevatt, D.O., Schiff, S. D. and Sparks, P.R. (1995), "A technique to assess wind uplift performance of standing seam metal roofs", Proceedings of the 11th Conference on Roofing Technology, National Roofing Contractors Association, Gaithersburg, Maryland.
  21. Rousch, C.J. and Hancock, G.J. (1997), "Comparison of tests of bridged and unbridged purlins with a non-linear analysis model", J. Constr. Steel Res., 41, 197-220. https://doi.org/10.1016/S0143-974X(97)00004-7
  22. Schafer, B.W. and Pekoz, T. (1999), "Laterally braced cold-formed steel flexural members with edge stiffened flanges", J. Struct. Eng., ASCE, 125, 118-127. https://doi.org/10.1061/(ASCE)0733-9445(1999)125:2(118)
  23. Schroter, R.C (1985), "Air pressure testing of sheet metal roofing", Proceedings of the 1985 International Symposium on Roof Technology, Structures and Techniques, Chicago, Illinois.
  24. Serrette, R. and Pekoz, T. (1997), "Bending strength of standing seam roof panels", Thin Wall. Struct., 27, 55-64. https://doi.org/10.1016/0263-8231(96)00018-3
  25. Shoemaker, W.L. (2009), "Design and specification of standing seam roof panels and systems", Proceedings of Structures 2009 Congress. Austin, Texas: Structural Engineering Institute of the American Society of Civil Engineers, 726-735.
  26. Song, X.G. (2012), Ultimate bearing capacity of cold-formed purlin-sheet roof under wind suctions,Tongji University, Shanghai.
  27. Surry, D., Sinno, R., Nail, B., Ho, T., Farquhar, S. and Kopp, G. (2007), "Structurally effective static wind loads for roof panels", J. Struct. Eng., ASCE, 133(6), 871-885. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:6(871)
  28. Vrany, T. (2006), "Effect of loading on the rotational restraint of cold-formed purlins", Thin Wall. Struct., 44, 1287-1292. https://doi.org/10.1016/j.tws.2007.01.004
  29. Zhang, L. and Tong, G.S. (2016), "Lateral buckling of simply supported C-and Z-section purlins with top flange horizontally restrained", Thin Wall. Struct., 99, 155-167. https://doi.org/10.1016/j.tws.2015.11.019