Moment modification factor of I-girder with trapezoidal-web-corrugations considering concentrated load height effects

Ngoc Duong Nguyen, Seung Ryong Han, Gyu Sei Lee, Young Jong Kang

Research output: Contribution to journalArticle

11 Citations (Scopus)


Moment modification factors of the I-girder with trapezoidal web corrugations subjected to concentrated load, applied at different heights on the cross section and various end restraint conditions, are investigated. The moment modification factors are obtained by finite element buckling analyses. The new FEM program is developed by using beam elements and new general formulas of cross-section properties as well as a new warping constant of the I-girder with trapezoidal web corrugations. The theoretical results of moment modification factors are compared with commercial finite element software (ABAQUS) using shell elements. A series of finite element analyses with different corrugation profiles and lengths is performed. Through comparative numerical studies, the theoretical results are successfully verified. The moment modification factors from the SSRC Guide are compared with present FEM results. The new values of the variable Cb, the moment modification factor, in the SSRC Guide are proposed as the variable Cb,c to improve the accuracy of lateral-torsional buckling strength.

Original languageEnglish
Pages (from-to)1773-1787
Number of pages15
JournalJournal of Constructional Steel Research
Issue number11
Publication statusPublished - 2011 Nov 1



  • End restraint conditions
  • I-girder
  • Load height effects
  • Moment modification factor
  • Trapezoidal web corrugations

ASJC Scopus subject areas

  • Building and Construction
  • Civil and Structural Engineering
  • Mechanics of Materials
  • Metals and Alloys

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