Moment modification factors of I-girder with trapezoidal web corrugations under moment gradient

Ngoc Duong Nguyen, Seung Ryong Han, Jung Hun Kim, Sung Nam Kim, Young Jong Kang

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18 Citations (Scopus)

Abstract

This paper investigates the moment modification factors of an I-girder with trapezoidal web corrugations under moment gradient and various end restraint conditions. The moment modification factors are obtained by using the finite element method with 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 successfully verified by comparing them with the results from the commercial finite element software using shell elements. A series of finite element analyses with different corrugation profiles and lengths are investigated. From the results, it is found that the present design of moment modification factor formulas cannot satisfactorily predict the buckling capacities of the I-girder with trapezoidal web corrugations under unequal end moments with various end restraint conditions. For the purpose of design, the closed-form expressions for the moment modification factors are proposed and successfully verified.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalThin-Walled Structures
Volume57
DOIs
Publication statusPublished - 2012 Aug 1

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Keywords

  • End restraint conditions
  • I-girder
  • Moment gradient
  • Moment modification factor
  • Trapezoidal web corrugations

ASJC Scopus subject areas

  • Mechanical Engineering
  • Building and Construction
  • Civil and Structural Engineering

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