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    Strength, stiffness and ductility of concrete-filled steel columns under axial compression

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    Publication date
    2017-03-15
    Author
    Lam, Dennis
    Wang, Z-B.
    Tao, Z.
    Han, L-H.
    Uy, B.
    Lam, Dennis
    Kang, W-H.
    Keyword
    Concrete-filled steel tubes; Axial compression; Finite element analysis; Compressive strength; Compressive stiffness; Ductility
    Rights
    (c) 2017 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 (http://creativecommons.org/licenses/by-nc-nd/4.0/)
    Peer-Reviewed
    Yes
    
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    Abstract
    Extensive experimental and theoretical studies have been conducted on the compressive strength of concrete-filled steel tubular (CFST) columns, but little attention has been paid to their compressive stiffness and deformation capacity. Despite this, strength prediction approaches in existing design codes still have various limitations. A finite element model, which was previously proposed by the authors and verified using a large amount of experimental data, is used in this paper to generate simulation data covering a wide range of parameters for circular and rectangular CFST stub columns under axial compression. Regression analysis is conducted to propose simplified models to predict the compressive strength, the compressive stiffness, and the compressive strain corresponding to the compressive strength (ductility) for the composite columns. Based on the new strength prediction model, the capacity reduction factors for the steel and concrete materials are recalibrated to achieve a target reliability index of 3.04 when considering resistance effect only.
    URI
    http://hdl.handle.net/10454/11141
    Version
    Accepted manuscript
    Citation
    Wang Z, Tao Z, Han L et al (2017) Strength, stiffness and ductility of concrete-filled steel columns under axial compression. Engineering Structures. 135: 209-221.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.engstruct.2016.12.049
    Type
    Article
    Collections
    Engineering and Informatics Publications

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