Experimental response and code modelling of continuous concrete slabs reinforced with BFRP bars

This paper presents test results and code predictions of four continuously and two simply supported concrete slabs reinforced with basalt fibre reinforced polymer (BFRP) bars. One continuously supported steel reinforced concrete slab was also tested for comparison purposes. All slabs tested were 500...

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Bibliographic Details
Published in:Composite structures 2014-01, Vol.107, p.664-674
Main Authors: Mahroug, M.E.M., Ashour, A.F., Lam, D.
Format: Article
Language:English
Subjects:
Bars
Basalt fibre reinforced polymer
Concrete
Continuous fibers
Cracks
Deflection
Flexural failure
Full-scale tests
Reinforced concrete
Reinforcing steels
Shear
Shear failure
Slabs
Structural steels
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Summary:This paper presents test results and code predictions of four continuously and two simply supported concrete slabs reinforced with basalt fibre reinforced polymer (BFRP) bars. One continuously supported steel reinforced concrete slab was also tested for comparison purposes. All slabs tested were 500mm in width and 150mm in depth. The simply supported slabs had a span of 2000mm, whereas the continuous slabs had two equal spans, each of 2000mm. Different combinations of under and over BFRP reinforcement at the top and bottom layers of slabs were investigated. The continuously supported BFRP reinforced concrete slabs exhibited larger deflections and wider cracks than the counterpart reinforced with steel. Furthermore, the over reinforced BFRP reinforced concrete slab at the top and bottom layers showed the highest load capacity and the least deflection of all BFRP slabs tested. All continuous BFRP reinforced concrete slabs failed owing to combined shear and flexure at the middle support region. ISIS-M03-07 and CSA S806-06 design guidelines reasonably predicted the deflection of the BFRP slabs tested. However, ACI 440-1R-06 underestimated the BFRP slab deflections and overestimated the moment capacities at mid-span and over support sections.
ISSN:0263-8223
1879-1085
DOI:10.1016/j.compstruct.2013.08.029