Cyclic Behavior of Hybrid Columns Made of Ultra High Performance Concrete and Fiber Reinforced Polymers
Publication: Journal of Composites for Construction
Volume 16, Issue 1
Abstract
The unique features of ultra-high-performance concrete (UHPC) in damage tolerance, energy absorption, and deformability were combined with the superior performance of concrete-filled fiber-reinforced polymer (FRP) tubes (CFFTs) to develop a novel hybrid system of FRP tube and UHPC, and the cyclic behavior of this system evaluated. Four specimens were tested. Two were steel-reinforced: one with conventional concrete (RC), and the other (RUHPC) with UHPC within twice the plastic hinge length and conventional concrete for the remainder of the column length. The other two had FRP tubes: one filled with conventional concrete (CFFT), and the other (UHPCFFT) filled with UHPC within twice the plastic hinge length and conventional concrete for the remainder of the column length. Each column was tested as a cantilever under a constant axial load and reverse cyclic lateral loads applied incrementally in displacement control. Each of the tubed specimens without any internal reinforcement achieved the same flexural strength and ductility as its steel-reinforced counterpart. Specimen UHPCFFT showed significantly higher flexural strength and initial stiffness, lower residual drift, and relatively similar energy dissipation as compared with Specimen RC. The proposed hybrid system can be optimized for strength and ductility as a viable alternative to the conventional RC column.
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Acknowledgments
This study was sponsored by the National Science Foundation’s for Earthquake Engineering Simulation Research (NEESR) program, as part of the multiuniversity Grant No. CMS-0420347 directed by Professor M. Saiid Saiidi at the University of Nevada, Reno. The experiments were carried out at the Titan America Structures and Construction Laboratory of the Florida International University. Findings and opinions expressed here, however, are those of the authors alone, and not necessarily the views of sponsoring agencies.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 16 • Issue 1 • February 2012
Pages: 91 - 99
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Sep 14, 2010
Accepted: Jun 13, 2011
Published in print: Feb 1, 2012
Published online: Apr 27, 2012
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