Abstract
This paper investigates the evaluation procedure of an AASHTO Type 3 precast-prestressed girder that was extensively damaged by truck impact and then repaired using externally bonded fiber-reinforced polymer (FRP) composites. Results of this study can be applied to bridges having similar vehicle impact incidents. Parameters whose effects were investigated on the evaluation procedure include (1) the effect of horizontal resistance of elastomeric bearing supports, (2) the presence of barrier wall and sidewalk, and (3) live load distribution factors obtained from finite-element analysis (FEA) compared with the simplified method prescribed by other codes. FEA showed that support horizontal resistance has negligible effects on live load distribution factors for shear, , while it has considerable effect on live load distribution factors for moment, . The live load distribution factors and calculated from the simplified method of analysis prescribed by other codes were observed to all be greater than those obtained from FEA, showing that the approach taken by other codes is conservative for the studied bridge. The and of external girders obtained by FEA were as much as 30 and 40% less than those of other codes. Inclusion of barrier wall and sidewalk in the analysis showed an additional 18% reduction for , with insignificant effect on . The live load capacity factor as the safety indicator in the bridge evaluation was calculated analytically by the load and resistance factor method and the mean load method and then correlated with experimental findings of proof load test on the repaired girder.
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Acknowledgments
The authors would like to sincerely acknowledge the support provided by Fonds Québécois de la Recherche sur la Nature et les Technologies (FQRNT) in the form of a postdoctoral bursary to the first author and Ryerson University Scholarly Research and Creative Activity (SRC) fund.
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Published In
Journal of Performance of Constructed Facilities
Volume 29 • Issue 6 • December 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 11, 2013
Accepted: Nov 14, 2013
Published online: Nov 16, 2013
Discussion open until: Feb 16, 2015
Published in print: Dec 1, 2015
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