Behavior of Concrete-Filled FRP Tubes under Cyclic Axial Compression
Publication: Journal of Composites for Construction
Volume 19, Issue 3
Abstract
Concrete-filled fiber-reinforced polymer (FRP) tubes (CFFTs) are an attractive form of hybrid compression members incorporating FRP. CFFTs have several advantages over traditional column forms, including their excellent corrosion resistance and ductility. Much research has been conducted on CFFTs over recent years, but no systematic experimental study has been concerned with the cyclic axial compressive behavior of CFFTs with a filament-wound FRP tube; such studies are needed for the development of a cyclic stress-strain model for the concrete in CFFTs. This paper therefore presents an experimental study on the behavior of circular CFFTs under cyclic axial compression. The experimental program included the strength of concrete as a key variable so that it also provides a much needed supplement to the very limited existing research on the cyclic compressive behavior of FRP-confined high-strength concrete (HSC). The test results are compared with a monotonic stress-strain model and a cyclic stress-strain model for FRP-confined concrete, both of which have been based on test databases that are limited to concrete confined with an FRP wrap and include only a small number of tests for HSC. The test results show that the cyclic axial stress-strain behavior of concrete in CFFTs is generally similar to that of concrete confined by an FRP wrap. The test results also show that the monotonic stress-strain model perform reasonably well for HSC in CFFTs, but revisions to the cyclic stress-strain model are needed before it can provide accurate predictions for HSC in cyclically loaded CFFTs.
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Acknowledgments
The work has been supported by the Natural Science Foundation of China (Project No. 51108096), the Hong Kong Research Grants Council (Project No. 528510), and the Australian Research Council through a Discovery Early Career Researcher Award (Project ID: DE140101349) for the second author.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 19 • Issue 3 • June 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Apr 16, 2014
Accepted: Jul 24, 2014
Published online: Sep 3, 2014
Discussion open until: Feb 3, 2015
Published in print: Jun 1, 2015
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