Composite Action of Concrete-Filled Rectangular GFRP Tubes
Publication: Journal of Composites for Construction
Volume 17, Issue 5
Abstract
This paper investigates the composite action and performance of rectangular concrete-filled glass fiber–reinforced polymer (GFRP) tubes in four-point bending. The study compares the performance of three different concrete-filled beam configurations with different levels of adhesive bonding of the concrete core to the GFRP tube. The three different configurations include (1) unbonded, (2) bonding of the flanges, and (3) bonding of the flanges and webs. The results show low composite action for the unbonded beam configuration up to full composite action for the completely bonded beam configuration. An analytical study is presented to provide insight into the failure mechanism for the fully bonded beam configuration and to predict ultimate capacity. For evaluation, the stiffness and strength of the fully bonded concrete-filled GFRP tube considered in this study is compared with a conventional steel reinforced concrete beam, concrete-filled steel tube, and concrete-filled GFRP tube with carbon FRP (CFRP) tension flange of the same dimensions.
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Acknowledgments
The authors would like to acknowledge Evapco Inc. for the donation of the GFRP tubes as well as Birdsall Sand and Gravel for providing the concrete used in this study. Special thanks to Forest Cooper for fabricating the testing and instrumentation hardware.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 17 • Issue 5 • October 2013
Pages: 722 - 731
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Sep 25, 2012
Accepted: Feb 12, 2013
Published online: Feb 14, 2013
Discussion open until: Jul 14, 2013
Published in print: Oct 1, 2013
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