A simplified approach for assessing the load-carrying capacity of reinforced concrete beams under concentrated load applied at high rates

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    Abstract

    The present article proposes a simplified method for evaluating the load-carrying capacity of reinforced concrete beams when subjected to concentrated impact loading at their mid-span. The method links the enhancement of load-carrying capacity with the shortening of the portion (termed herein effective
    length) of the beam which has been found both experimentally and numerically to resist the action of the applied load under increasing loading rates. The proposed method is validated through a comparative study of its predictions with published experimental data, as well as numerical results obtained by
    means of three dimensional dynamic nonlinear finite-element analyses. The proposed method is not intended to explain the rate effect; it merely uses the apparent link between ‘‘the effective length’’ and the imposed rate of loading as the means for the development of a simplified approach suitable for use in
    practical structural design.
    Original languageEnglish
    Pages (from-to)907–917
    Number of pages11
    JournalInternational Journal of Impact Engineering
    Volume37
    Issue number8
    DOIs
    Publication statusPublished - Aug 2010

    Keywords

    • RC beams
    • impact loading
    • loading rate
    • design

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