Cyclic Compressive Behavior of Concrete Confined with Large Rupture Strain FRP Composites
Publication: Journal of Composites for Construction
Volume 18, Issue 1
Abstract
Fiber-reinforced polymer (FRP) composites with a large rupture strain (LRS) (i.e., having an ultimate tensile strain larger than 5%) are promising jacketing materials for the seismic retrofit of reinforced concrete (RC) columns. These LRS FRPs are environmentally friendly as their reinforcing fibers can be made from recycled plastics [e.g., polyethylene terephthalate (PET) bottles]; as a result, they are also cheaper than conventional FRPs [i.e., carbon FRP (CFRP), glass GFRP (GFRP), and aramid FRP (AFRP)]. This paper presents the first-ever study on the behavior and modeling of LRS FRP-confined concrete under cyclic axial compression. Experimental results are first presented to examine both the envelope compressive stress-strain curve and the cumulative effect of loading cycles. A cyclic stress-strain model is then proposed and shown to provide close predictions of the test results. The proposed cyclic stress-strain model is formed by combining an existing monotonic stress-strain model for predicting the envelope curve with an existing cyclic stress-strain model for predicting the unloading and reloading paths. This cyclic stress-strain model can be employed in modeling the behavior of LRS FRP-jacketed RC columns subjected to seismic loading.
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Acknowledgments
The authors are grateful for the financial support received from the National Basic Research Program of China (the 973 Program) (Project No. 2012CB026200) and through a Ph.D. studentship of Hong Kong Polytechnic University, awarded to the first author.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 18 • Issue 1 • February 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Dec 29, 2012
Accepted: Apr 12, 2013
Published online: Apr 13, 2013
Published in print: Feb 1, 2014
Discussion open until: Mar 11, 2014
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