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Implementation project: strengthening of a bridge near Hondo, Texas using post-installed shear connectors.
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2009-03-01
[PDF-3.67 MB]
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Alternative Title:Strengthening of a bridge near Hondo, Texas using post-installed shear connectors;Implementation project: bridge strengthening through the use of post-installed shear connectors;
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Abstract:This project was an implementation of research conducted under TxDOT Research Project 0-4124 on the use
of post-installed shear connectors to develop composite action in existing non-composite steel bridge girder
systems. In this implementation study, an existing non-composite bridge in the San Antonio District was
retrofitted with these three types of post-installed shear connectors to increase the load-carrying capacity of the
bridge girders. The bridge is located near the town of Hondo, Texas, and is referred to herein as the Hondo
Bridge. A detailed design for strengthening the Hondo Bridge was undertaken in this study. Potential design
and construction difficulties were identified and solutions to these difficulties were suggested. The bridge
consists of three identical simple spans and each span was retrofitted with a different type of post-installed
shear connector. A load rating was conducted for the Hondo Bride prior to retrofit, showing an HS10.6
inventory level rating and an HS17.6 operating level rating. With the addition of the post-installed shear
connectors, the load rating for the bridge increased to HS17.4 inventory level and HS29.1 operating level.
Thus, both the inventory level and operating level load ratings increased 65-percent as a result of the
installation of post-installed shear connectors. Field live load tests were conducted to verify the development
composite action in the bridge girders after installation of the post-installed shear connectors. Installation of
the shear connectors in the Hondo bridge proved more difficult than anticipated. Construction difficulties and
possible solutions are discussed in the report.
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