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    Finite element analysis on the capacity of circular concrete-filled double-skin steel tubular (CFDST) stub columns

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    Publication date
    2014-08-01
    Author
    Pagoulatou, M.
    Sheehan, Therese
    Dai, Xianghe
    Lam, Dennis
    Keyword
    Composite columns; Concrete filled double-skin columns
    Rights
    © 2014 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    Yes
    
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    Abstract
    This paper presents the behaviour of circular concrete-filled double-skin steel tubular (CFDST) stub columns compressed under concentric axial loads. To predict the performance of such columns, a finite element analysis is conducted. Herein, for the accurate modelling of the double-skin specimens, the identification of suitable material properties for both the concrete infill and steel tubes is crucial. The applied methodology is validated through comparisons of the results obtained from the finite element analysis with those from past experiments. Aiming to examine the effect of various diameter-to-thickness (D/t) ratios, concrete cube strengths and steel yield strengths on the overall behaviour and ultimate resistance of the double-skin columns, a total of twenty-five models are created to conduct the parametric study. In addition, four circular concrete-filled steel tubes (CFST) are included to check the dissimilarities, in terms of their behaviour and weight, when compared with identical double-skin tubes. A new formula based on Eurocode 4 is proposed to evaluate the strength of the double-skin specimens. Based on the comparison between the results derived from the analysis, the proposed formulae for the concrete filled double-skin would appear to be satisfactory.
    URI
    http://hdl.handle.net/10454/9891
    Version
    Accepted manuscript
    Citation
    Pagoulatou M, Sheehan T, Dai X and Lam D (2014) Finite element analysis on the capacity of circular concrete-filled double-skin steel tubular (CFDST) stub columns. Engineering Structures. 72: 102–112.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.engstruct.2014.04.039
    Type
    Article
    Collections
    Engineering and Informatics Publications

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