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Compressive behaviour of partially FRP confined concrete: Experimental observations and assessment of the stress-strain models

Journal Article


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Abstract


  • This study provides new insight on the compressive behaviour of partially fibre reinforced polymer (FRP)

    confined concrete with either strain-hardening or strain-softening responses. Fully FRP confined concrete,

    partially FRP confined concrete with different strip gaps, and unconfined concrete were tested

    under axial compression. Four types of axial load-axial deformation behaviours were observed for specimens

    with different strip gaps. Even though a high volumetric ratio of FRP was applied, the confinement

    effectiveness was negligible when the strip gap exceeded the diameter of the specimens. Moreover, the

    axial stress-axial strain behaviours of wrapped and non-wrapped concrete were observed to be different,

    and significant strain localization was observed within the non-wrapped region. Based on the experimental

    observations and an extensive literature review, a confinement effectiveness coefficient was proposed

    for partially FRP confined concrete. A stress-strain model was then developed by considering the proposed

    confinement effectiveness coefficient. The developed stress-strain model provided better predictions

    than other existing stress-strain models.

Publication Date


  • 2018

Citation


  • Wang, W., Sheikh, M. Neaz., Al-Baali, A. Q. & Hadi, M. N. S. (2018). Compressive behaviour of partially FRP confined concrete: Experimental observations and assessment of the stress-strain models. Construction and Building Materials, 192 785-797.

Ro Full-text Url


  • https://ro.uow.edu.au/context/eispapers1/article/2994/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1990

Number Of Pages


  • 12

Start Page


  • 785

End Page


  • 797

Volume


  • 192

Place Of Publication


  • Netherlands

Abstract


  • This study provides new insight on the compressive behaviour of partially fibre reinforced polymer (FRP)

    confined concrete with either strain-hardening or strain-softening responses. Fully FRP confined concrete,

    partially FRP confined concrete with different strip gaps, and unconfined concrete were tested

    under axial compression. Four types of axial load-axial deformation behaviours were observed for specimens

    with different strip gaps. Even though a high volumetric ratio of FRP was applied, the confinement

    effectiveness was negligible when the strip gap exceeded the diameter of the specimens. Moreover, the

    axial stress-axial strain behaviours of wrapped and non-wrapped concrete were observed to be different,

    and significant strain localization was observed within the non-wrapped region. Based on the experimental

    observations and an extensive literature review, a confinement effectiveness coefficient was proposed

    for partially FRP confined concrete. A stress-strain model was then developed by considering the proposed

    confinement effectiveness coefficient. The developed stress-strain model provided better predictions

    than other existing stress-strain models.

Publication Date


  • 2018

Citation


  • Wang, W., Sheikh, M. Neaz., Al-Baali, A. Q. & Hadi, M. N. S. (2018). Compressive behaviour of partially FRP confined concrete: Experimental observations and assessment of the stress-strain models. Construction and Building Materials, 192 785-797.

Ro Full-text Url


  • https://ro.uow.edu.au/context/eispapers1/article/2994/type/native/viewcontent

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1990

Number Of Pages


  • 12

Start Page


  • 785

End Page


  • 797

Volume


  • 192

Place Of Publication


  • Netherlands