Girder–Deck Interface: Partial Debonding, Deck Replacement, and Composite Action
Publication: Journal of Bridge Engineering
Volume 24, Issue 1
Abstract
Results are reported from tests of three precast, prestressed concrete girders under fatigue-type cyclic and monotonic loading conducted after deck removal and replacement. Although deck demolition altered the top surface of the girders, the girder–deck interfaces exhibited shear strengths greater than their nominal strength (based on the 2012 AASHTO LRFD Specification) after 2 × 106 cycles of loading to 45 and 30% of their nominal strength for troweled and roughened interfaces, respectively. A partially debonded detail was used for two of the girders to protect the girder top flange, which was wide and thin, during deck demolition. The roofing felt used to debond the girder–deck interface over the flanges reduced the effort required for deck removal by 65%, compared with the typical detail, eliminated chipping hammer–induced damage to the girder flanges, and still resulted in sustained composite action under 2 × 106 cycles of loading. The width of the bonded interface had little effect on girder stiffness and no observed effect on the width of deck effective in bending.
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Acknowledgments
Financial support was provided by the Kansas DOT (Grant C2036). Coreslab Structures donated the precast concrete girders. Input from Shawn Schwensen and Colby Farlow of the Kansas DOT is gratefully acknowledged. The conclusions are those of the authors and do not necessarily represent the views of the sponsors.
References
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Information
Published In
Journal of Bridge Engineering
Volume 24 • Issue 1 • January 2019
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Feb 19, 2018
Accepted: May 31, 2018
Published online: Oct 17, 2018
Published in print: Jan 1, 2019
Discussion open until: Mar 17, 2019
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