Repair of Full-Scale Timber Bridge Chord Members by Shear Spiking
Publication: Journal of Bridge Engineering
Volume 13, Issue 4
Abstract
The addition of vertically oriented shear spikes (fiberglass reinforced polymer rods) was shown to increase the effective stiffness of the stringers of a full-scale timber bridge chord specimen. Results found from the flexural load testing of a full-scale timber bridge chord laboratory specimen are presented. Reinforcement was provided with diameter shear spikes bonded to the wood by an epoxy resin. The bridge chord specimen was intentionally damaged to simulate degradation. Shear spikes were then installed from the top of the member into predrilled holes to provide horizontal shear resistance and to improve the flexural effective stiffness. Results from the testing showed that with the insertion of five sets of shear spikes the average flexural effective stiffness recovered in the four stringers of the chord was 91.6%.
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Acknowledgments
This study was conducted using funds provided by the U.S. Department of Transportation to the Mountain Plains Consortium (MPC), via the University Transportation Centers Programs. Colorado State University is a member of the MPC, and the work was done at its Structural Engineering Laboratory. Students Steve Babcock, Misty Butler, Charles Manu, Rob Suarez, Elliot De Jongh, and Karl Wolfswinkel assisted with the physical testing. The contents of this paper reflect the views of the writers, who are responsible for the facts and the accuracy of the information presented. The U.S. Government assumes no liabilities for the contents or use thereof.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 13 • Issue 4 • July 2008
Pages: 310 - 318
Copyright
© 2008 ASCE.
History
Received: Apr 12, 2006
Accepted: Nov 1, 2007
Published online: Jul 1, 2008
Published in print: Jul 2008
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