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    Discussion on the suitability of dynamic constitutive models for prediction of geopolymer concrete structural responses under blast and impact loading

    Access Status
    Fulltext not available
    Authors
    Chen, Chong
    Zhang, Xihong
    Hao, Hong
    Cui, Jian
    Date
    2022
    Type
    Journal Article
    
    Metadata
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    Citation
    Chen, C. and Zhang, X. and Hao, H. and Cui, J. 2022. Discussion on the suitability of dynamic constitutive models for prediction of geopolymer concrete structural responses under blast and impact loading. International Journal of Impact Engineering. 160: ARTN 104064.
    Source Title
    International Journal of Impact Engineering
    DOI
    10.1016/j.ijimpeng.2021.104064
    ISSN
    0734-743X
    Faculty
    Faculty of Science and Engineering
    School
    School of Civil and Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/89089
    Collection
    • Curtin Research Publications
    Abstract

    Compared to ordinary Portland cement-based concrete (OPC), geopolymer concrete (GPC) is an environmental-friendly construction material because it is mixed by replacing Portland cement with industry wastes such as fly ash. Despite intensive researches in the last two decades, application of geopolymer concrete in construction is still rather limited. One of the reasons is the quasi-static and dynamic material properties of geopolymer concrete, which are different from those of ordinary Portland-cement concrete, are not well defined yet, and the available design guides for geopolymer concrete structures are very limited. The existing design guides and dynamic constitutive models for OPC cannot be directly employed in design analysis and numerical modelling of GPC structures subjected to blast and impact loads. This paper first summaries the available dynamic material testing data on GPC, compares them with the widely used dynamic constitutive models for OPC, and discusses the suitability of those models for modelling GPC structures. Then, based on the available GPC material testing data, new material constants for strength model, equation of state and dynamic increase factors are derived for GPC. Finally numerical modellings are carried out using these material models with modifications for GPC material to examine their accuracies in simulating the dynamic responses and damages of structural components made of GPC subjected to blast and impact loads.

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