Flexural Behavior of CFRP Precast Prestressed Decked Bulb T-Beams
Publication: Journal of Composites for Construction
Volume 16, Issue 3
Abstract
This study introduces an innovative scheme of bridge superstructure for expedited construction, improved serviceability, and extended life span. The new bridge superstructure is assembled from precast prestressed decked bulb -beams reinforced and prestressed with corrosion-free fiber-reinforced polymer (FRP) materials. An experimental investigation accompanied by analytical and numerical simulations was developed to evaluate the performance of the newly developed beams. Through the experimental investigation, three single decked bulb -beams were constructed and tested to failure. The first beam, served as a control beam, and was prestressed and reinforced with conventional steel strands and reinforcing bars. The second and third beams were prestressed and reinforced with carbon-fiber composite cable (CFCC) strands and carbon-fiber-reinforced polymer (CFRP) tendons, respectively. The investigation revealed that the performance of beams reinforced with CFRP tendons or CFCC strands was comparable with the performance of the control beam at both service and ultimate limit states. All three beams exhibited high load-carrying capacity with large corresponding deflection and fair amount of absorbed energy before failure. The study showed that the corrosion-free FRP-reinforced decked bulb -beams can be safely deployed in construction to enhance the performance and extend the life span of bridge superstructures.
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Acknowledgments
This investigation was sponsored through a consortium of the Michigan Department of Transportation (Center of Excellence No. 0436/2), National Science Foundation (Award No. CMMI-0969676), U.S. Department of Transportation (Contract No. DTOS59-06-G-00030), Tokyo Rope Mfg. Co. Ltd., and Diversified Composites, Inc. The authors gratefully acknowledge their support.
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Information
Published In
Journal of Composites for Construction
Volume 16 • Issue 3 • June 2012
Pages: 225 - 234
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Jun 22, 2011
Accepted: Oct 31, 2011
Published online: Nov 3, 2011
Published in print: Jun 1, 2012
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