Shear Capacity of CFRP Posttensioned Grouted Transverse Joints under Concentrated Loads
Publication: Journal of Bridge Engineering
Volume 21, Issue 7
Abstract
The transverse joint between full-depth precast concrete panels in accelerated bridge construction (ABC) is a critical element for satisfactory performance of bridge decks. Live loads on bridge decks are caused by concentrated loads from truck tires. The shear capacity of new female-to-female grouted transverse joints constructed with precast concrete panels under concentrated loads was investigated and compared to experimental results. The experiments were carried out on transverse joints posttensioned with carbon-fiber-reinforced polymer (CFRP) rods and on non-posttensioned joints. A finite-element model was developed to determine stress transfer of concentrated loads at transverse joints. Two different design distribution widths were investigated based on (1) AASHTO recommendations and (2) finite-element analysis. Four methods were considered for calculating transverse joint capacity: shear friction, strut-and-tie model, principal tension stress, and a beam shear equation under axial compression. The shear friction method predicts the capacity with satisfactory accuracy for non-posttensioned joints and is conservative for posttensioned joints; the strut-and-tie model predicts the capacity of posttensioned joints with satisfactory accuracy.
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Acknowledgments
The authors acknowledge the financial support of the Utah Department of Transportation and in-kind contributions from Hanson Structural Precast and Sika Inc. The authors thank Mark Bryant of the University of Utah and Dr. Ruifen Liu of Michael Baker International for their assistance. The authors also acknowledge the assistance of Kevin Baczynski.
References
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Published In
Journal of Bridge Engineering
Volume 21 • Issue 7 • July 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Aug 6, 2015
Accepted: Dec 30, 2015
Published online: Feb 19, 2016
Published in print: Jul 1, 2016
Discussion open until: Jul 19, 2016
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