Lateral-torsional buckling of discretely-braced I-girder

H. E. Lee, C. T. Nguyen, J. H. Moon, H. S. Joo

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


This paper presents an analytical solution for lateral-torsional buckling strength and stiffness requirements of I-girders with discrete torsional bracings subjected to non-uniform bending. The critical moment and torsional stiffness requirement are derived by using an energy method for an arbitrary number of bracing points. An equivalent moment factor is introduced to evaluate buckling moments of fully braced I-girders. From the results, it is found that proposed solutions agree well with results of finite element analyses regardless of the number of bracing points, while results for the equivalent continuous brace stiffness concept are not suitable for multiple discrete torsionally-braced beams.

Original languageEnglish
Pages (from-to)264-271
Number of pages8
JournalProcedia Engineering
Publication statusPublished - 2011
Event12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12 - Hong Kong, Hong Kong
Duration: 2011 Jan 262011 Jan 28


  • Energy method
  • Lateral-torsional buckling
  • Stiffness requirement
  • Torsional bracing

ASJC Scopus subject areas

  • Engineering(all)


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