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    Flexural behaviour of hybrid steel-GFRP reinforced concrete continuous T-beams

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    Publication date
    2020-12-15
    Author
    Almahmood, Hanady A.A.
    Ashour, Ashraf F.
    Sheehan, Therese
    Keyword
    Fibre-reinforced polymer
    Hybrid reinforced system
    Continuous beams
    T-section
    Moment redistribution
    Rights
    © 2020 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
    Peer-Reviewed
    Yes
    
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    Abstract
    This paper presents test results of six full scale reinforced concrete continuous T beams. One beam was reinforced with glass fibre reinforced polymer (GFRP) bars while the other five beams were reinforced with a different combination of GFRP and steel bars. The ratio of GFRP to steel reinforcement at both mid-span and middle-support sections was the main parameter investigated. The results showed that adding steel reinforcement to GFRP reinforced concrete T-beams improves the flexural stiffness, ductility and serviceability in terms of crack width and deflection control. However, the moment redistribution at failure was limited because of the early yielding of steel reinforcement at a beam section that does not reach its moment capacity and could still carry more loads due to the presence of FRP reinforcement. The experimental results were compared with the ultimate moment prediction of ACI 440.2R-17, and with the existing theoretical equations for deflection prediction. It was found that the ACI 440.2R-17 reasonably estimated the moment capacity of both mid-span and middle support sections. Conversely, the available theoretical deflection models underestimated the deflection of hybrid reinforced concrete T-beams at all load stages.
    URI
    http://hdl.handle.net/10454/17994
    Version
    Accepted manuscript
    Citation
    Almahmood H, Ashour AF and Sheehan T (2020) Flexural behaviour of hybrid steel-GFRP reinforced concrete continuous T-beams. Composite Structures. 254: 112802.
    Link to publisher’s version
    https://doi.org/10.1016/j.compstruct.2020.112802
    Type
    Article
    Collections
    Engineering and Informatics Publications

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