The effects of axial tension on the hogging-moment regions of composite beams

George Vasdravellis, Brian Uy, Ee Loon Tan, Brendan Kirkland

    Research output: Contribution to journalArticle

    25 Citations (Scopus)

    Abstract

    Structural parts commonly comprised of composite members such as bridge approaches, inclined parking
    ramps and stadium beams, can be subjected to a combination of high axial loads and bending moments. Steel–
    concrete composite construction is a popular solution for these types of structures due to the numerous
    advantages that they offer. Although, current design codes (e.g. Eurocode 4, American code AISC, Australian
    codes AS2327 and AS5100) provide rules for the design of composite columns subjected to flexure and axial
    load, however the design of composite beams, which are asymmetric in nature under the combined effects of
    tension and bending, is not yet fully addressed. This paper investigates the ultimate strength of composite
    beams under the combined effects of axial tension and negative (hogging) bending moment. An experimental
    programme carried out in the laboratory of the University of Western Sydney comprised of a total of six
    specimens representing composite beams and subjected to various levels of axial tension and bending
    moment. Ultimate failure modes were identified and the resulting interaction diagrams were compared to the
    results of sectional rigid plastic analysis. Following the tests, three-dimensional finite element models were
    employed using the ABAQUS finite element software to further investigate the nonlinear behaviour of the
    composite beams and extend the experimental observations by studying the effects of parameters such as the
    span length and the effect of partial shear connection. Finally, simple design rules and formulae are proposed
    for use in engineering practice.
    Original languageEnglish
    Pages (from-to)20-33
    Number of pages14
    JournalJournal of Constructional Steel Research
    Volume68
    Issue number1
    DOIs
    Publication statusPublished - 2012

    Keywords

    • Composite beams
    • Negative bending
    • Finite element analysis
    • axial tension

    ASJC Scopus subject areas

    • Civil and Structural Engineering

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