Flexural behaviour of concrete slabs reinforced with GFRP bars and hollow composite reinforcing systems

Al-Rubaye, Mohammed and Manalo, Allan and Alajarmeh, Omar and Ferdous, Wahid ORCID: https://orcid.org/0000-0002-4473-4722 and Lokuge, Weena and Benmokrane, Brahim and Edoo, Azam (2020) Flexural behaviour of concrete slabs reinforced with GFRP bars and hollow composite reinforcing systems. Composite Structures, 236:111836. pp. 1-12.

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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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Date Deposited: 15 Jun 2020 03:41
Last Modified: 22 Jul 2020 03:33
Uncontrolled Keywords: Flexural behaviour; Hollow core concrete slabs; Composite reinforcing system; GFRP bars; Modelling
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
B Economic Development > 87 Construction > 8798 Environmentally Sustainable Construction > 879899 Environmentally Sustainable Construction not elsewhere classified
B Economic Development > 87 Construction > 8702 Construction Design > 870202 Commercial Construction Design
Identification Number or DOI: DOI:10.1016/j.compstruct.2019.111836
URI: http://eprints.usq.edu.au/id/eprint/37713

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