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    Predicting the response of locally resonant concrete structure under blast load

    91368.pdf (3.304Mb)
    Access Status
    Open access
    Authors
    Jin, H.
    Hao, Hong
    Hao, Yifei
    Chen, Wensu
    Date
    2020
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Jin, H. and Hao, H. and Hao, Y. and Chen, W. 2020. Predicting the response of locally resonant concrete structure under blast load. Construction and Building Materials. 252: ARTN 118920.
    Source Title
    Construction and Building Materials
    DOI
    10.1016/j.conbuildmat.2020.118920
    ISSN
    0950-0618
    Faculty
    Faculty of Science and Engineering
    School
    School of Civil and Mechanical Engineering
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/FL180100196
    URI
    http://hdl.handle.net/20.500.11937/91544
    Collection
    • Curtin Research Publications
    Abstract

    Ternary locally resonant metamaterial (LRM) is a manmade material consisting of rigorously designed heavy inclusions with coated soft layer. Such design enables the LRM to possess good wave-filtering characteristics that differ from the matrix materials. Researches of application of this new material for seismic isolation and sound insulation in civil engineering have been reported. In recent decades, there has been an increasing demand to protect civil engineering structures against the effects of blast loading. When blast wave acts on a concrete structure, complex stress waves are generated and propagate in the structure. The wave-filtering characteristics of LRM have brought inspiration to investigate its potential application to reduce the stress wave propagation and hence the damage to cementitious material and enhance the performance of structures under blast wave. By embedding heavy inclusions with soft coating layer into mortar matrix, the product can be named as ternary locally resonant concrete (ternary LRC). Previous studies of the performances of ternary LRC structures are mainly limited to finite element (FE) modeling of elastic wave propagation. The study of the performance of ternary LRC structure subjected to blast loading and the influence of blast loading-induced damage to LRC structure on stress wave propagation is very limited. This paper carries out analytical derivation and numerical modelling to study the mechanism and performance of ternary LRC structure under blast loading. The strain rate effect and material damage of the mortar matrix are considered in numerical simulation. The influence of different material inclusions (natural aggregates and lead), different elastic modulus and thickness of the soft coating on the response of ternary LRC structure are studied. The results show that the ternary LRC can effectively reduce the damage of ternary LRC structure subjected to blast loading.

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