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Behavior of a Steel Girder Bolted Splice Connection (Report) Publication Number: FHWA-HRT-17-042.

This report compares two design methods for bolted field splice connections on steel bridges. Using computer models, researchers created a hypothetical three-span steel bridge. They designed the connections using both a traditional method and a new method that makes conservative assumptions resulting in a simpler, streamlined procedure.

The researchers found that the design methods resulted in no difference in the numbers of bolts required for the flange splices. However, the models showed a significant difference in the number of bolts required for the web splices, with the new method requiring only two columns of bolts at a much larger spacing. Overall, the new method required 104 fewer bolts than the traditional method, making the connection more economical. The new method proved successful because it did not result in overstressing the girder or bolts at the strength limit state.

Partly because of this work, in June 2016, the American Association of State Highway and Transportation Officials voted to adopt a new method for the design of bolted connections for steel bridges.

The document is available at /publications/research/infrastructure/structures /bridge/17042/index.cfm.

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Title Annotation:Communication Product Updates
Publication:Public Roads
Article Type:Brief article
Geographic Code:1USA
Date:Mar 22, 2018
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Next Article:Advanced Methodology to Assess Riprap Rock Stability at Bridge Piers and Abutments (Report) Publication Number: FHWA-HRT-17-054.

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