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

    Research output: Contribution to journalArticlepeer-review

    25 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

    Bibliographical note

    Funding Information:
    This research was supported by a grant ( code 07- Technology Innovation-A01 ) from the Construction Technology Innovation Program funded by the Ministry of Construction & Transportation of the Korean government.

    Keywords

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

    ASJC Scopus subject areas

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

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