Nontraditional Shear Failures in Bulb-T Prestressed Concrete Bridge Girders
Publication: Journal of Bridge Engineering
Volume 21, Issue 7
Abstract
An experimental study was conducted in which five identical, full-scale bulb-T bridge girders were constructed and tested to shear failure. Although the shear span was kept the same for all of the tests (a = 3d), the distance from the end of the specimen to the center of the support bearing (overhang length) was varied. Varying the overhang length controlled whether or not the critical section subject to shear fell within the transfer length, which affected whether the specimen failure was caused by a traditional shear mechanism (web crushing, flexure-shear, etc.) or a nontraditional shear mechanism (e.g., horizontal shear or shear failure induced by anchorage zone distress). The shear failure values were compared with each other to investigate whether nontraditional shear mechanisms result in a lower capacity than traditional mechanisms. These values were also compared with nominal design capacities related to each different failure mechanism.
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Acknowledgments
The authors would like to thank B. Stasney, A. Valentine, D. Fillip, D. Braley, and the rest of the support staff at the Ferguson Structural Engineering Laboratory for their assistance during testing of these specimens.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 21 • Issue 7 • July 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jul 28, 2015
Accepted: Nov 5, 2015
Published online: Feb 3, 2016
Published in print: Jul 1, 2016
Discussion open until: Jul 3, 2016
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