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Lateral torsional buckling of cellular steel beams

Joanna Nseir, Moussa Lo, Delphine Sonck UGent, Olivier Vassart and Nicolas Boissonnade (2012) Proceedings of the Annual Stability Conference Structural Stability Research Council.
abstract
Present paper deals with the behavior of so-called cellular members against lateral torsional buckling. These beams comprising regularly-spaced web openings are especially used for their high resistance-weight ratio, the possibility to integrate service pipes within their height, and aesthetics. Such profiles usually exhibit a complex behavior, since they can experience many modes of failure, including local instability ones, i.e. those involving an out-of-plane instability of the web post at high shear locations and/or distortion of the cross-section. For what regards global instability, the members are usually designed by means of rough design rules, which often lead to an unduly conservative girder, the beams sometimes showing over 200% resistance reserve. Present research aims at improving this situation, by means of new adequate design formulae. In this respect, both experimental and extensive numerical parametric studies have been undertaken. First, a series of 3 full-scale tests has been performed, the main goal of which being the validation of purposely-derived FE models. Since the numerical models showed a very good agreement with the tests, they have been further used to gather a large set of numerical reference results where many parameters were varied: the relative slenderness, steel grades, cross-section shapes, bending moment distributions, and relative sizes of the openings. Finally, a new set of dedicated design rules has been derived, that was proved to be accurate while leading to safe estimates of the resistance when compared to all reference results.
Please use this url to cite or link to this publication:
author
organization
year
type
conference
publication status
published
subject
in
Proceedings of the Annual Stability Conference Structural Stability Research Council
pages
15 pages
publisher
SSRC
place of publication
Grapevine, Texas, USA
conference name
Annual Stability Conference : Structural Stability Research Council (SSRC - 2012)
conference location
Grapevine, Texas, USA
conference start
2012-04-18
conference end
2012-04-21
ISBN
9781622760756
language
English
UGent publication?
yes
classification
C1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2130334
handle
http://hdl.handle.net/1854/LU-2130334
date created
2012-06-04 10:57:25
date last changed
2013-11-19 08:59:20
@inproceedings{2130334,
  abstract     = {Present paper deals with the behavior of so-called cellular members against lateral torsional buckling. These beams comprising regularly-spaced web openings are especially used for their high resistance-weight ratio, the possibility to integrate service pipes within their height, and aesthetics. Such profiles usually exhibit a complex behavior, since they can experience many modes of failure, including local instability ones, i.e. those involving an out-of-plane instability of the web post at high shear locations and/or distortion of the cross-section. For what regards global instability, the members are usually designed by means of rough design rules, which often lead to an unduly conservative girder, the beams sometimes showing over 200\% resistance reserve. Present research aims at improving this situation, by means of new adequate design formulae. In this respect, both experimental and extensive numerical parametric studies have been undertaken. First, a series of 3 full-scale tests has been performed, the main goal of which being the validation of purposely-derived FE models. Since the numerical models showed a very good agreement with the tests, they have been further used to gather a large set of numerical reference results where many parameters were varied: the relative slenderness, steel grades, cross-section shapes, bending moment distributions, and relative sizes of the openings. Finally, a new set of dedicated design rules has been derived, that was proved to be accurate while leading to safe estimates of the resistance when compared to all reference results.},
  author       = {Nseir, Joanna and Lo, Moussa and Sonck, Delphine and Vassart, Olivier and Boissonnade, Nicolas},
  booktitle    = {Proceedings of the Annual Stability Conference Structural Stability Research Council},
  isbn         = {9781622760756},
  language     = {eng},
  location     = {Grapevine, Texas, USA},
  pages        = {15},
  publisher    = {SSRC},
  title        = {Lateral torsional buckling of cellular steel beams},
  year         = {2012},
}

Chicago
Nseir, Joanna, Moussa Lo, Delphine Sonck, Olivier Vassart, and Nicolas Boissonnade. 2012. “Lateral Torsional Buckling of Cellular Steel Beams.” In Proceedings of the Annual Stability Conference Structural Stability Research Council. Grapevine, Texas, USA: SSRC.
APA
Nseir, J., Lo, M., Sonck, D., Vassart, O., & Boissonnade, N. (2012). Lateral torsional buckling of cellular steel beams. Proceedings of the Annual Stability Conference Structural Stability Research Council. Presented at the Annual Stability Conference : Structural Stability Research Council (SSRC - 2012), Grapevine, Texas, USA: SSRC.
Vancouver
1.
Nseir J, Lo M, Sonck D, Vassart O, Boissonnade N. Lateral torsional buckling of cellular steel beams. Proceedings of the Annual Stability Conference Structural Stability Research Council. Grapevine, Texas, USA: SSRC; 2012.
MLA
Nseir, Joanna, Moussa Lo, Delphine Sonck, et al. “Lateral Torsional Buckling of Cellular Steel Beams.” Proceedings of the Annual Stability Conference Structural Stability Research Council. Grapevine, Texas, USA: SSRC, 2012. Print.