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Effect of angle stiffeners on the flexural strength and stiffness of cold-formed steel beams

  • Dar, M. Adil (Department of Civil Engineering, Indian Institute of Technology Delhi) ;
  • Subramanian, N. ;
  • Rather, Amer I. (Department of Civil Engineering, National Institute of Technology Srinagar) ;
  • Dar, A.R. (Department of Civil Engineering, National Institute of Technology Srinagar) ;
  • Lim, James B.P. (Department of Civil & Environmental Engineering, University of Auckland) ;
  • Anbarasu, M. (Department of Civil Engineering, Government College of Engineering Salem) ;
  • Roy, Krishanu (Department of Civil & Environmental Engineering, University of Auckland)
  • Received : 2019.01.13
  • Accepted : 2019.10.01
  • Published : 2019.10.25
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Abstract

Cold-formed steel (CFS) sections when used as primary load carrying members often require additional strengthening for retrofitting purposes. In some cases, it is also necessary to reduce deflections in order to satisfy serviceability requirements. The introduction of angle sections, screwed to the webs so as to act as external stiffeners, has the potential to both increase flexural strength as well as reduce deflections. This paper presents the results of ten four-point bending tests, on built-up CFS sections, both open and closed, with different stiffening arrangements. In the laboratory tests, the stiffening arrangements increased the moment capacity and stiffness of the CFS beams by up to 85% and 100% respectively. The increase in moment capacity was more evident for the open sections, while that reduction in deflection was largest for the closed sections.

Keywords

References

  1. Acharya, S.R., Sivakumaran, K.S. and Young, B. (2013), "Reinforcement schemes for cold-formed steel joists with a large web opening in shear zone-An experimental investigation", Thin-Wall. Struct., 72, 28-36. https://doi.org/10.1016/j.tws.2013.06.011
  2. AISI S-100-2016 (2016), North American specification for the design of cold-formed steel structural members, AISI Standard, Washington, DC, USA.
  3. Azmi, M., Yatim, M.Y.M., Esa, A. and Badaruzzaman, W.H.W. (2017), "Experimental studies on perforated plate girders with inclined stiffeners", Thin-Wall. Struct., 117, 247-256. https://doi.org/10.1016/j.tws.2017.04.021
  4. Biggs, K.A., Ramseyer, C., Ree, S. and Kang, T.H. (2015), "Experimental testing of cold-formed built-up members in pure compression", Steel Compos. Struct., Int. J., 18(6), 1331-1351. https://doi.org/10.12989/scs.2015.18.6.1331
  5. Dar, M.A., Yusuf, M., Dar, A.R. and Raju, J. (2015a), "Experimental study on innovative sections for cold formed steel beams", Steel Compos. Struct., Int. J., 19(6), 1599-1610. https://doi.org/10.12989/scs.2015.19.6.1599
  6. Dar, M.A., Subramanian, N., Dar, A.R. and Raju, J. (2015b), "Experimental investigations on the structural behaviour of a distressed bridge", Struct. Eng. Mech., Int. J., 56(4), 695-705. https://doi.org/10.12989/sem.2015.56.4.695
  7. Dar, M.A., Subramanian, N., Dar, A.R. and Raju, J. (2017), "Rehabilitation of a distressed steel roof truss - A study", Struct. Eng. Mech., Int. J., 62(5), 567-576. https://doi.org/10.12989/sem.2017.62.5.567
  8. Dar, M.A., Sahoo, D.R. and Jain, A.K. (2018a), "Battened built-up cold-formed steel columns: strength and deformation behaviour", Adv. Concrete Struct. Geotech. Eng., Bloomsbury, 185-189. (Ed. S.B. Singh, D. Bhunia and G. Muthukumar)
  9. Dar, M.A., Sahoo, D.R., Pulikkal, S. and Jain, A.K. (2018b), "Behaviour of laced built-up cold-formed steel columns: Experimental investigation and numerical validation", Thin-Wall. Struct., 132, 398-409. https://doi.org/10.1016/j.tws.2018.09.012
  10. Dar, M.A., Subramanian, N., Dar, A.R., Anbarasu, M. and Lim, J.B.P. (2018c), "Structural Performance of Cold-formed Steel Composite Beams", Steel Compos. Struct., Int. J., 27(5), 545-554. https://doi.org/10.12989/scs.2018.27.5.545
  11. Dar, M.A., Subramanian, N., Dar, A.R., Anbarasu, M., Lim, J.B.P. and Mir, A. (2019a), "Behaviour of partly stiffened cold-formed steel built-up beams : Experimental investigation and numerical validation", Adv. Struct. Eng., 2(1), 172-186. https://doi.org/10.1177/1369433218782767
  12. Dar, M.A., Sahoo, D.R. and Jain, A.K. (2019b), "Axial compression behavior of laced cold-formed steel built-up columns with unstiffened angle sections", J. Constr. Steel Res. 162. https://doi.org/10.1016/j.jcsr.2019.105727
  13. Fratamico, D.C., Torabiana, S., Zhao, X., Rasmussen, K.J.R. and Schafer, B.W. (2018), "Experimental study on the composite action in sheathed and bare built-up cold-formed steel columns", Thin-Wall. Struct., 127, 290-305. https://doi.org/10.1016/j.tws.2018.02.002
  14. Haidarali, M.R. and Nethercot, D.A. (2012), "Local and distortional buckling of cold-formed steel beams with both edge and intermediate stiffeners in their compression flanges", Thin-Wall. Struct., 54, 106-112. https://doi.org/10.1016/j.tws.2012.02.013
  15. Hancock, G.J. (2016), "Cold-formed steel structures: Research review 2013-2014", Adv. Struct. Eng., 19(3), 1-16. https://doi.org/10.1177/1369433216630145
  16. IS 1608-2005 (2005), Indian Standard- Metallic Materials - Tensile Testing at Ambient Temperature; Bureau of Indian Standards, New Delhi, India.
  17. IS 2062-2011 (2011), Indian Standard, Hot rolled medium and high tensile structural steel specification; Bureau of Indian Standards, New Delhi, India.
  18. IS 801-2010 (2010), Indian Standard- Code of Practice for Use of Cold Formed Light Gauge Steel Structural Members in General Building Construction; Bureau of Indian Standards, New Delhi, India.
  19. Islam, S.M.Z. and Young, B. (2013), "Strengthening of ferritic stainless steel tubular structural members using FRP subjected to Two-Flange-Loading", Thin-Wall. Struct., 62, 179-190. https://doi.org/10.1016/j.tws.2012.09.001
  20. Islam, S.M.Z. and Young, B. (2014), "FRP strengthening of lean duplex stainless steel hollow sections subjected to web crippling", Thin-Wall. Struct., 85, 183-200. https://doi.org/10.1016/j.tws.2014.08.010
  21. Keerthan, P. and Mahendran, M. (2013), "Experimental studies of the shear behaviour and strength of lipped channel beams with web openings", Thin-Wall. Struct., 73, 131-144. https://doi.org/10.1016/j.tws.2013.06.018
  22. Khate, K., Patton, M.L. and Marthong, C. (2018), Structural behaviour of stainless steel stub column under axial compression: a FE study", Int. J. Steel Struct., 18, 1-18. https://doi.org/10.1007/s13296-018-0083-1
  23. Kim, S., Yom, K. and Choi, S. (2015), "A study on the structural performance of new shape built-up square column under concentric axial load", Steel Compos. Struct., Int. J., 18(6), 1451-1464. https://doi.org/10.12989/scs.2015.18.6.1451
  24. Kumar, N. and Sahoo, D.R. (2016), "Optimization of lip length and aspect ratio of thin channel sections under minor axes bending", Thin-Wall. Struct., 100, 158-169. https://doi.org/10.1016/j.tws.2015.12.015
  25. Lawson, R.M., Lim, J., Hicks, S.J. and Simms, W.I. (2006), "Design of composite asymmetric cellular beams and beams with large web openings", J. Constr. Steel Res. 62(6), 614-629. https://doi.org/10.1016/j.jcsr.2005.09.012
  26. Mathison, C., Roy, K., Clifton, G.C., Ahmadi, A., Masood, R. and Lim, J.B.P. (2019a), "Novel pin jointed moment connection for cold-formed steel trusses", Steel Compos. Struct., Int. J., 31(5), 453-467. https://doi.org/10.12989/scs.2019.31.5.453
  27. Roy, K. Ting, T.C.H., Lau, H.H. and Lim, J.B.P. (2018), "Nonlinear behavior of axially loaded back-to-back built-up cold-formed steel un-lipped channel sections", Steel Compos. Struct., Int. J., 28(2), 233-250. https://doi.org/10.12989/scs.2018.28.2.233
  28. Roy, K., Lau, H.H. and Lim, J.B.P. (2019), "Finite element modelling of back-to-back built-up cold-formed stainless-steel lipped channels under axial compression", Steel Compos. Struct., Int. J., 33(1), 869-898. https://doi.org/10.12989/scs.2019.33.1.869
  29. Sakalysa, G. and Daniunas, A. (2017), "Numerical investigation on web crippling behaviour of cold-formed C-section beam with vertical stiffeners", Procedia Eng., 172, 1102-1109. https://doi.org/10.1016/j.proeng.2017.02.171
  30. SP 6-1-2003 (2003), Handbook for Structural Engineers -Part- 1 Structural Steel Sections; Bureau of Indian Standards, New Delhi, India.
  31. SP 6-5-1980 (1980), Handbook for Structural Engineers -Part- 5 Cold-formed, Light-gauge Steel Structures; Bureau of Indian Standards, New Delhi, India.
  32. Subramanian, N. (2016), Design of Steel Structures-Limit States Method, (2nd Edition), Oxford University Press, New Delhi, India.
  33. URL, http://www.bundesteel.com
  34. Uzzaman, A., Lim, J.B.P., Nash, D. and Young, B. (2017), "Effects of edge-stiffened circular holes on the web crippling strength of cold-formed steel channel sections under one-flange loading conditions", Eng. Struct., 139, 96-107. https://doi.org/10.1016/j.engstruct.2017.02.042
  35. Valsa Ipe, T., Sharada Bai, H., Manjula Vani, K. and Iqba, M.M.Z. (2013), "Flexural behavior of cold-formed steel concrete composite" Steel Compos. Struct., Int. J., 14(2), 105-120. https://doi.org/10.12989/scs.2013.14.2.105
  36. Wang, L. and Young, B. (2014), "Design of cold-formed steel channels with stiffened webs subjected to bending", Thin-Wall. Struct., 85, 81-92. https://doi.org/10.1016/j.tws.2014.08.002
  37. Wang, L. and Young, B. (2016), "Behavior of Cold-Formed Steel Built-Up Sections with Intermediate Stiffeners under Bending. I: Tests and Numerical Validation", J. Struct. Eng., 142, 1-9. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001428
  38. Wanniarachchi, K.S., Mahendran, M. and Keerthan, P. (2017), "Shear behaviour and design of Lipped Channel Beams with non-circular web openings", Thin-Wall. Struct., 119, 83-102. https://doi.org/10.1016/j.tws.2017.03.035
  39. Yam, M.C.H., Lam, A.C.C., Wei, F. and Chung, K.F. (2007), "The Local Web Buckling Strength of Stiffened Coped Steel IBeams", Steel Struct., 7, 129-138.
  40. Yam, M.C.H., Ma, M., Lam, A.C.C. and Chung, K.F. (2011), "Experimental study of the strength and behaviour of reinforced coped beams", J. Constr. Steel Res., 67(11), 1749-1759. https://doi.org/10.1016/j.jcsr.2011.04.015
  41. Yang, Y. and Lui, E.M. (2012), "Behavior and design of steel Ibeams with inclined stiffeners", Steel Compos. Struct., Int. J., 12(3), 183-205. https://doi.org/10.12989/scs.2012.12.3.183
  42. Young, B. (2005), "Local buckling and shift of effective centroid of cold-formed steel columns", Steel Compos. Struct., Int. J., 5(2-3), 235-246. https://doi.org/10.12989/scs.2005.5.2_3.235