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    Mechanical properties and behaviour of concrete reinforced with spiral-shaped steel fibres under dynamic splitting tension

    246249_246249.pdf (1.164Mb)
    Access Status
    Open access
    Authors
    Hao, Y.
    Hao, Hong
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Hao, Y. and Hao, H. 2016. Mechanical properties and behaviour of concrete reinforced with spiral-shaped steel fibres under dynamic splitting tension. Magazine of Concrete Research. 68 (21): pp. 1110-1121.
    Source Title
    Magazine of Concrete Research
    DOI
    10.1680/jmacr.15.00372
    ISSN
    0024-9831
    School
    Department of Civil Engineering
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP130104332
    Remarks

    Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees

    URI
    http://hdl.handle.net/20.500.11937/15478
    Collection
    • Curtin Research Publications
    Abstract

    Concrete exhibits excellent resistance to compressive forces, but is brittle and weak in tension. Various types of fibres have been investigated by many researchers to improve the ductility and energy absorption capability of concrete materials and structures under static and blast and impact loadings. Spiral-shaped steel fibres were recently proposed as reinforcement in a concrete matrix and it was found that spiral fibre reinforcement can significantly improve the ductility, crack control ability and energy absorption capacity of concrete material under static and impact compressive loads. This paper presents an experimental study of the static and dynamic properties of steel fibre reinforced concrete (SFRC) materials under splitting tension. SFRC materials mixed with spiral-shaped steel fibres of different volume fractions were prepared and tested. A high-speed camera was used to capture the deformation, failure and crack opening process of the tested specimens. The contribution of spiral fibres to the mechanical properties and behaviour of concrete at high strain rate under splitting tension was investigated. Analyses of the test results revealed the effectiveness of spiral fibres in improving the performance of SFRC (e.g. crack control, energy absorption capability and more pronounced rate sensitivity under dynamic splitting loading). Moreover, crack opening and closing (pull-back by spiral fibres) processes were observed, demonstrating the excellent bonding and outstanding performance of spiral steel fibres in maintaining the integrity of the concrete material, thus resulting in significant improvements in impact resistance and energy dissipation.

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      Concrete is a brittle material with much lower strength in tension as compared to that in compression. Adding fibres into concrete mix has been intensively investigated to increase the ductility, the crack control and ...
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