Fatigue Evaluation of the Deck Truss of Bridge 9340
2001-03-01
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Fatigue Evaluation of the Deck Truss of Bridge 9340
Published Date
2001-03-01
Publisher
Type
Abstract
This research project resulted in a new, accurate way to assess fatigue cracking on Bridge 9340 on I-35, which crosses the Mississippi River near downtown Minneapolis. The research involved installation on both the main trusses and the floor truss to measure the live-load stress ranges. Researchers monitored the strain gages while trucks with known axle weights crossed the bridge under normal traffic. Researchers then developed two-and three-dimensional finite-element models of the bridge, and used the models to calculate the stress ranges throughout the deck truss. The bridge's deck truss has not experienced fatigue cracking, but it has many poor fatigue details on the main truss and floor truss system. The research helped determine that the fatigue cracking of the deck truss is not likely, which means that the bridge should not have any problems with fatigue cracking in the foreseeable future. As a result, Mn/DOT does not need to prematurely replace this bridge because of fatigue cracking, avoiding the high costs associated with such a large project. The research also has implications for other bridges. The project verified that the use of strain gages at key locations combined with detailed analysis help predict the bridge's behavior. In addition, the instrumentation plan can be used in other similar bridges.
Keywords
Description
Related to
Replaces
License
Collections
Series/Report Number
Funding information
Minnesota Department of Transportation
Isbn identifier
Doi identifier
Previously Published Citation
Suggested citation
Dexter, Robert; O'Connell, Heather; Bergson, Paul. (2001). Fatigue Evaluation of the Deck Truss of Bridge 9340. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/726.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.