United States Department of Transportation
i
Experimental tests and numerical analyses of steel truss bridge gusset connections.
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2012-11-01
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[PDF-11.24 MB]
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures;NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance;
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Abstract:Gusset plates connect individual steel truss bridge members together at a node. In 10% of the 200,000 steel bridges in US in 2008, failure of a
single truss or connection could lead to collapse. Regular inspection and load rating are essential for the safe operation and maintenance of these
bridges.
The Minneapolis I-35 Bridge collapse was the first gusset failure where a design flaw was implicated. Load rating gusset plates is a significant
challenge given the number of connections and the complexity of accurately evaluating each one. The majority of research on gusset plate
strength is from small-scale connections. More refined techniques are needed to conduct high-fidelity capacity evaluations.
Finite element analysis (FEA) is widely used in structural engineering. Using FEA in gusset plate evaluation presents challenges due to the
connections’ large-scale, high degree of geometric variability and complex load paths.
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