Flexural Performance of Carbon Fiber-Reinforced Polymer Prestressed Concrete Side-by-Side Box Beam Bridge
Publication: Journal of Composites for Construction
Volume 15, Issue 5
Abstract
The effect of varying transverse posttensioning levels and arrangements on the load response of a one-half scale 30° skewed seven box beam bridge model was investigated. The effective span of the bridge model was 9.45 m (31 ft) with a width of 3.35 m (11 ft) and depth of 355.6 mm (14 in.). The bridge model was prestressed and reinforced with carbon fiber composite cables (CFCCs). CFCCs were also used as shear reinforcement. The bridge model was provided with five transverse diaphragms equally spaced along the length of the bridge. The experimental investigation included load and strain distribution tests and a flexural ultimate load test. The load and strain distribution tests were conducted on the bridge model with and without full-depth longitudinal cracks at the shear-key locations. The investigation showed that the application of an adequate transverse posttensioning force was successful in restoring the load distribution of the bridge model with full-depth longitudinal deck cracks to that of the case without deck cracks. The ultimate load and the associated compression-controlled failure mode of the bridge model agreed well with that predicted according to ACI 440.4R-04 and numerical analysis. The behavior of the bonded pretensioned and reinforced CFCC strands was linear elastic and remained intact throughout the collapse of the bridge model. The unbonded transverse posttensioned CFCC strand also remained intact.
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Acknowledgments
The research presented in this paper was made possible by support from the Michigan Economic Development Corporation (MEDC) contract No. UNSPECIFIED06-1-P1-450 and the Center for Innovative Materials Research (CIMR) at Lawrence Technological University.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 5 • October 2011
Pages: 663 - 671
Copyright
© 2011 American Society of Civil Engineers.
History
Received: May 19, 2010
Accepted: Jan 14, 2011
Published online: Jan 17, 2011
Published in print: Oct 1, 2011
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