Structural Engineering and Mechanics

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Elastic distortional buckling of overhanging beams

  • Bradford, M.A. (Department of Structural Engineering, School of Civil Engineering, The University of New South Wales)
  • Published : 1996.01.25
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Abstract

The paper considers the elastic distortional buckling of overhanging beams, which consist of an internal segment with a cantilevered segment continuous over an internal support. The beams were considered loaded by a concentrated load at the cantilever tip, and the beams were either partially restrained or laterally restrained over the internal support. An efficient line-type finite element developed previously by the author was modified to incorporate loading remote from the shear centre, as well as to allow for lateral buckling without distortion. Buckling loads were obtained for a range of geometry when the load was placed on the top flange, at the shear centre or on the bottom flange. Buckling mode shapes were also obtained, and conclusions drawn regarding the influence of distortion on the overall buckling load.

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References

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  3. Braford, M.A. (1992b), "Bucking of doubly-symmetric cantilevers with thin webs", Engineering Structures, 14, 327-334. https://doi.org/10.1016/0141-0296(92)90046-S
  4. Braford, M.A. and Trahair, N.S. (1981), "Distortional buckling of I-beams" Journal of the Structural Division, ASCE, 107(ST2), 355-370.
  5. Hancock, G.J. and Trahair, N.S. (1978), "Finitie element analysis of the lateral buckling of continuously restrained beam-columns", Civil Engineering Transactions, I.E. Aust, CE20(2), 120-127.
  6. Hancock, G.J., Bradford, M.A. and Trahair, N.S. (1980), "Web distortion and flexural-torsional buckling", Journal of the Structural Division, ASCE, 106(ST7), 1557-1571.
  7. Ronagh, H.R. and Bradford, M.A. (1996), "A rational model for the distortional buckling of tapered members", Computer Methods in Applied Mechanics and Engineering.
  8. Trahair, N.S. (1983), "Lateral buckling of overhanging beams", Proceedings of International Conference on Instability and Plastic Collapse of Steel Structures (L.J. Morris ed.), Granada, London, 503-518.
  9. Trahair, N.S. (1993), Flexural-torsional buckling of structures, Chapman and Hall, London.
  10. Trahair, N.S. and Bradford, M.A. (1991), The behaviour and design of steel structures, Revised 2nd edn. Chapman and Hall, London.

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  2. Distortional buckling of elastically restrained cantilevers vol.47, pp.1-2, 1998, https://doi.org/10.1016/S0143-974X(98)80003-5
  3. Distortional buckling of overhanging monorails vol.32, pp.4, 2010, https://doi.org/10.1016/j.engstruct.2009.12.025
  4. Stability problems analysed by finite element and boundary element techniques — A bibliography (1994–1996) vol.26, pp.4, 1997, https://doi.org/10.1016/S0168-874X(96)00089-3
  5. Study on Global Stability of Mono-Overhanging Steel Beam vol.186, pp.1662-8985, 2011, https://doi.org/10.4028/www.scientific.net/AMR.186.151