Structural Engineering and Mechanics

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Lateral buckling of beams with top bracing

  • Park, Jong-Sup (Department of Civil Engineering, 238 Harbert Engineering Center, Auburn University) ;
  • Kang, Young-Jong (Department of Civil and Environmental Engineering, Korea University)
  • Received : 2003.04.25
  • Accepted : 2003.09.29
  • Published : 2003.11.25
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Abstract

This paper presents the lateral-torsional buckling (LTB) of beams or girders with continuous lateral support at top flange. Traditional moment gradient factors ($C_b$) given by AISC in LRFD Specification for Structural Steel Buildings and by AASHTO in LRFD Bridge Design Specifications were reviewed. Finite-element method buckling analyses of doubly symmetric I-shaped beams with continuous top bracing were conducted to develop new moment gradient factors. A uniformly distributed load was applied at midheight and either or both end moments were applied at the ends of beams. The proposed solutions are simple and accurate for use by engineers to determine the LTB resistance of beams.

Keywords

References

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Cited by

  1. Nonsway Model for Lateral Torsional Buckling of Wooden Beams under Wind Uplift vol.142, pp.12, 2016, https://doi.org/10.1061/(ASCE)EM.1943-7889.0001172