Flexural behaviour of concrete slabs reinforced with GFRP bars and hollow composite reinforcing systems
Article
Article Title | Flexural behaviour of concrete slabs reinforced with GFRP bars and hollow composite reinforcing systems |
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ERA Journal ID | 3731 |
Article Category | Article |
Authors | Al-Rubaye, Mohammed (Author), Manalo, Allan (Author), Alajarmeh, Omar (Author), Ferdous, Wahid (Author), Lokuge, Weena (Author), Benmokrane, Brahim (Author) and Edoo, Azam (Author) |
Journal Title | Composite Structures |
Journal Citation | 236, pp. 1-12 |
Article Number | 111836 |
Number of Pages | 12 |
Year | 2020 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0263-8223 |
1879-1085 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compstruct.2019.111836 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0263822318341060 |
Abstract | Glass Fibre Reinforced Polymer (GFRP) bars are now attracting attention as an alternative reinforcement in concrete slabs because of their high resistance to corrosion that is a major problem for steel bars. Recentlyhollow concrete slab systems are being used to reduce the amount of concrete in the slab and to minimise the self-weight, but the internal holes makes them prone to shear failure and collapse. A hollow composite reinforcing system (CRS) with four flanges to improve the bond with concrete has recently been developed to stabilise the holes in concrete members. This study investigated the flexural behaviour of concrete slabs reinforced with GFRP bars and CRS. Four full-scale concrete slabs (solid slab reinforced with GFRP bars; hollow slab reinforced with GFRP bars; slab reinforced with GFRP bars and CRS; and slab reinforced with steel bars and CRS) were prepared and tested under four-point static bending to understand how this new construction system would perform. CRS is found to enhance the structural performance of hollow concrete slabs because it is more compatible with GFRP bars than steel bars due to their similar modulus of elasticity. A simplified Fibre Model Analysis (FMA) reliably predicted the capacity of hollow concrete slabs. |
Keywords | Flexural behaviour; Hollow core concrete slabs; Composite reinforcing system; GFRP bars; Modelling |
ANZSRC Field of Research 2020 | 400510. Structural engineering |
400505. Construction materials | |
Byline Affiliations | Centre for Future Materials |
University of Sherbrooke, Canada | |
Composite Reinforcing Solutions, Australia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q587y/flexural-behaviour-of-concrete-slabs-reinforced-with-gfrp-bars-and-hollow-composite-reinforcing-systems
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