Structural Engineering and Mechanics

  • 제64권5호
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  • Pages.621-640
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  • 2017
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Post buckling mechanics and strength of cold-formed steel columns exhibiting Local-Distortional interaction mode failure

  • Muthuraj, Hareesh (School of Civil and Chemical Engineering, VIT University) ;
  • Sekar, S.K. (School of Civil and Chemical Engineering, VIT University) ;
  • Mahendran, Mahen (School of Civil and Built Environment, QUT) ;
  • Deepak, O.P. (School of Civil and Chemical Engineering, VIT University)
  • 투고 : 2017.07.10
  • 심사 : 2017.10.03
  • 발행 : 2017.12.10
⟨ 이전 논문 다음 논문 ⟩

초록

This paper reports the numerical investigation conducted to study the influence of Local-Distortional (L-D) interaction mode buckling on post buckling strength erosion in fixed ended lipped channel cold formed steel columns. This investigation comprises of 81 column sections with various geometries and yield stresses that are carefully chosen to cover wide range of strength related parametric ratios like (i) distortional to local critical buckling stress ratio ($0.91{\leq}F_{CRD}/F_{CRL}{\leq}4.05$) (ii) non dimensional local slenderness ratio ($0.88{\leq}{\lambda}_L{\leq}3.54$) (iii) non-dimensional distortional slenderness ratio ($0.68{\leq}{\lambda}_D{\leq}3.23$) and (iv) yield to non-critical buckling stress ratio (0.45 to 10.4). The numerical investigation is carried out by conducting linear and non-linear shell finite element analysis (SFEA) using ABAQUS software. The non-linear SFEA includes both geometry and material non-linearity. The numerical results obtained are deeply analysed to understand the post buckling mechanics, failure modes and ultimate strength that are influenced by L-D interaction with respect to strength related parametric ratios. The ultimate strength data obtained from numerical analysis are compared with (i) the experimental tests data concerning L-D interaction mode buckling reported by other researchers (ii) column strength predicted by Direct Strength Method (DSM) column strength curves for local and distortional buckling specified in AISI S-100 (iii) strength predicted by available DSM based approaches that includes L-D interaction mode failure. The role of flange width to web depth ratio on post buckling strength erosion is reported. Then the paper concludes with merits and limitations of codified DSM and available DSM based approaches on accurate failure strength prediction.

키워드

과제정보

연구 과제 주관 기관 : VIT University

참고문헌

  1. ABAQUS (Computer software), ABAQUS Standard User's Manual, Version 6.12, Providence, RI, Dassault Systemes Simulia.
  2. AISI S100 (2007), North American Specification for the Design of Cold-formed Steel Structural Members, American Iron and Steel Institute (AISI), Washington, DC.
  3. Ajeesh, S.S. and Jayachandran, A. (2017), "A constrained spline finite strip method for mode decomposition of cold-formed steel sections using GBT principles", Thin Wall. Struct., 113, 83-93. https://doi.org/10.1016/j.tws.2017.01.004
  4. Anbarasu, M. (2016), "Local-distortional buckling interaction on cold-formed steel lipped channel beams", Thin Wall. Struct., 98, 351-359. https://doi.org/10.1016/j.tws.2015.10.003
  5. AS/AZ 4600 (2005), Australian/New Zealand Standard for Cold- formed Steel Structures, Second Edition, Sydney-Wellington.
  6. Bebiano, R., Silvestre, N. and Camotim, D. (2008), "GBTUL-A code for the buckling analysis of cold-formed steel members", Nineteenth International Specialty Conference on Cold-Formed Steel Structures, St. Louis, Missouri, U.S.A, October.
  7. Davies, J.M. and Leach, P. (1992), "Some applications of generalized beam theory", Eleventh International Specialty Conference on Cold-Formed Steel Structures, St. Louis, Missouri, U.S.A, October.
  8. Dinis, P.B., Young, B. and Camotim, D. (2014), "Local-distortional interaction in cold-formed steel rack-section columns", Thin Wall. Struct., 81, 185-194. https://doi.org/10.1016/j.tws.2013.09.010
  9. Gioncu, V. (1994), "General theory of coupled instabilities", Thin Wall. Struct., 19, 81-127. https://doi.org/10.1016/0263-8231(94)90024-8
  10. Hancock, G.J. (2003), "Cold formed steel structures", J. Constr. Steel Res., 59, 473-487. https://doi.org/10.1016/S0143-974X(02)00103-7
  11. He, Z., Zhou, X., Liu, Z. and Chen, M. (2014), "Post-buckling behaviour and DSM design of web-stiffened lipped channel columns with distortional and local mode interaction", Thin Wall. Struct., 84, 189-203. https://doi.org/10.1016/j.tws.2014.07.001
  12. Kumar, M.A. and Kalyanaraman, V. (2014), "Distortional buckling of CFS stiffened lipped channel compression members", J. Struct. Eng., 140(12), 04014099. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001027
  13. Kwon, Y.B. and Hancock, G.J. (1992), "Tests of cold-formed channels with local and distortional buckling", J. Struct. Eng., 117(7), 1786-1803.
  14. Kwon, Y.B., Kim, B.S. and Hancock, G.J. (2009), "Compression tests of high strength cold-formed steel channels with buckling interaction", J. Constr. Steel Res., 65, 278-289. https://doi.org/10.1016/j.jcsr.2008.07.005
  15. Kwon, Y.B., Kim, N.G. and Kim, B.S. (2005), "A study on direct strength method for compression members undergoing mixed mode buckling", International Proceedings Of Steel Structures ISSS'05, Seoul, Korea.
  16. Loughlan, J., Yidris, N. and Jones, K. (2012), "The failure of thin- walled lipped channel compression members due to coupled local-distortional interactions and material yielding", Thin Wall. Struct., 61, 14-21. https://doi.org/10.1016/j.tws.2012.03.025
  17. Martins, A.D., Camotim, D., Dinis, P.B. and Young, B. (2015), "Local-distortional interaction in cold-formed steel columns: mechanics, testing, numerical simulation and design", Struct., 4, 38-57. https://doi.org/10.1016/j.istruc.2015.10.005
  18. Martins, A.D., Dinis, P.B. and Camotim, D. (2016), "On the influence of local-distortional interaction in the behaviour and design of cold-formed steel web-stiffened lipped channel columns", Thin Wall. Struct., 101, 181-204. https://doi.org/10.1016/j.tws.2015.11.021
  19. Martins, A.D., Dinis, P.B., Camotim, D. and Providência, P. (2015), "On the relevance of local-distortional interaction effects in the behaviour and design of cold-formed steel columns", Comput. Struct., 160, 57-89. https://doi.org/10.1016/j.compstruc.2015.08.003
  20. Mulligan, G P. and Pekoz, T. (1987), "Local buckling interaction in cold-formed columns", J. Struct. Eng., 113(3), 604-620. https://doi.org/10.1061/(ASCE)0733-9445(1987)113:3(604)
  21. Narayanan, S. and Mahendran, M. (2003), "Ultimate capacity of innovative cold-formed steel columns", J. Constr. Steel Res., 59(4), 489-508. https://doi.org/10.1016/S0143-974X(02)00039-1
  22. Sadovský, Z., Kriváček, J., Ivančo, V. and Ďuricová, A. (2012), "Computational modelling of geometric imperfections and buckling strength of cold-formed steel", J. Constr. Steel Res., 78, 1-7. https://doi.org/10.1016/j.jcsr.2012.06.005
  23. Schafer, B.W. (2002), "Local, distortional and Euler buckling of thin-walled column", J. Struct. Eng., 128(3), 289-299. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:3(289)
  24. Schafer, B.W. (2006), "Review: The direct strength method of cold-formed steel member design", Stability And Ductility of Steel Structures, Lisbon, Portugal, September.
  25. Schafer, B.W. and Pekoz, T. (1998), "Computational modelling of cold-formed steel: characterizing geometric imperfections and residual stresses", J. Constr. Steel Res., 47, 193-210. https://doi.org/10.1016/S0143-974X(98)00007-8
  26. Schafer, B.W., Li, Z. and Moen, C.D. (2010), "Computational Modelling of cold-formed steel", Thin Wall. Struct., 48, 752-762. https://doi.org/10.1016/j.tws.2010.04.008
  27. Silvestre, N., Camotim, D. and Dinis, P.B. (2009), "Direct strength prediction of lipped channel columns experiencing local- plate/distortional interaction", Adv. Steel Constr., 5(1), 49-71.
  28. Silvestre, N., Camotim, D. and Dinis, P.B. (2012), "Post-buckling behaviour and direct strength design of lipped channel columns experiencing local/distortional interaction", J. Constr. Steel Res., 73, 12-30. https://doi.org/10.1016/j.jcsr.2012.01.005
  29. Yang, D. and Hancock, G.J. (2004), "Compression tests of high strength steel channel columns with interaction between local and distortional buckling", J. Struct. Eng., 130(12), 1954-1963. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:12(1954)
  30. Young, B. and Yan, J. (2002), "Channel columns undergoing local, distortional and overall buckling", J. Struct. Eng., 128(6), 728-736. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:6(728)
  31. Young, B., Silvestre, N. and Camotim, D. (2013), "Cold-formed steel lipped channel columns influenced by local-distortional interaction: strength and DSM design", J. Struct. Eng., 139(6), 1059-1074. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000694
  32. Zeinoddini, V.M. and Schafer, B.W. (2012), "Simulation of geometric imperfections in cold-formed steel members using spectral representation approach", Thin Wall. Struct., 60, 105-117. https://doi.org/10.1016/j.tws.2012.07.001

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