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    Structural response of concrete-filled elliptical steel hollow sections under eccentric compression

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    Publication date
    2012
    Author
    Sheehan, Therese
    Dai, Xianghe
    Chan, T.M.
    Lam, Dennis
    Keyword
    REF 2014; Steel tubular stub columns;
    Concrete-filled tubes;
    Elliptical hollow sections;
    Eccentric compression;
    Numerical modelling;
    Experimental analysis;
    Interaction curves;
    Peer-Reviewed
    yes
    
    Metadata
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    Abstract
    The purpose of this research is to examine the behaviour of elliptical concrete-filled steel tubular stub columns under a combination of axial force and bending moment. Most of the research carried out to date involving concrete-filled steel sections has focussed on circular and rectangular tubes, with each shape exhibiting distinct behaviour. The degree of concrete confinement provided by the hollow section wall has been studied under pure compression but remains ambiguous for combined compressive and bending loads, with no current design provision for this loading combination. To explore the structural behaviour, laboratory tests were carried out using eight stub columns of two different tube wall thicknesses and applying axial compression under various eccentricities. Moment-rotation relationships were produced for each specimen to establish the influence of cross-section dimension and axis of bending on overall response. Full 3D finite element models were developed, comparing the effect of different material constitutive models, until good agreement was found. Finally, analytical interaction curves were generated assuming plastic behaviour and compared with the experimental and finite element results. Ground work provided from these tests paves the way for the development of future design guidelines on the member level.
    URI
    http://hdl.handle.net/10454/5916
    Version
    published version paper
    Citation
    Sheehan, T., Dai, X., Chan, T. M. and Lam, D. (2012). Structural response of concrete-filled elliptical steel hollow sections under eccentric compression. Engineering Structures. Vol. 45, pp. 314-323.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.engstruct.2012.06.040
    Type
    Article
    Collections
    Engineering and Informatics Publications

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