Composite T-Beams Using Reduced-Scale Rectangular FRP Tubes and Concrete Slabs
Publication: Journal of Composites for Construction
Volume 10, Issue 2
Abstract
A composite system consisting of rectangular glass fiber reinforced polymer (GFRP) tubes connected to concrete slabs, using GFRP dowels has been developed. Seven beam specimens have been tested, including hollow and concrete-filled GFRP tubes with and without concrete slabs. Beam–slab specimens had two different shear span-to-depth ratios and one specimen had carbon–fiber reinforced polymer (CFRP)-laminated tension flange for enhanced flexural performance. Additionally, three double-shear GFRP tube-slab assemblies have been tested to assess the shear behavior of GFRP dowels, in both hollow and concrete-filled tubes. Three compression stubs of concrete-filled tubes were also tested by loading them parallel to the cross-section plane, to study GFRP web buckling behavior. The study showed that GFRP dowels performed well in shear and that composite action is quite feasible. While hollow tubes can act compositely with concrete slabs, more slip between the tube and slab would occur, compared to a concrete-filled tube-slab system. Simplified models are proposed to predict critical web buckling load of fiber reinforced polymer (FRP) tubes. Based on the models, a critical shear span-to-depth ratio of 4 was determined, below which web buckling may occur before flexural failure.
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Acknowledgment
The writers wish to acknowledge financial support provided by the Natural Sciences and Engineering Research Council of Canada (NSERC), ISIS Canada, Bedford Plastics Inc., and ADS Composites Pultral for providing the materials.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 10 • Issue 2 • April 2006
Pages: 172 - 181
Copyright
© 2006 ASCE.
History
Received: Dec 7, 2004
Accepted: Jul 28, 2005
Published online: Apr 1, 2006
Published in print: Apr 2006
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