An ear to the deck

A continuous-monitoring system is being test-deployed by the Minnesota Department of Transportation (MnDOT) in order to assess the structural health of one of its bridges, the Cedar Avenue Bridge, connecting Minneapolis and its south suburbs. The state has a large number of fracture-critical steel bridges, with the need to be monitored for fractured. With the new system, the bridge's acoustic emissions - stress waves caused by activity or events on the bridge - are detected by sensors and recorded. The goal is to implement a semiautonomous system that can detect acoustic emissions, as well as differentiate between background noise and potential fracture events, and then alert bridge engineers if something warrants further investigation. Details of the system's design are presented. Also mentioned is testing technology (smart bridge technology) and instrumentation that is being used on the new I-35W Saint Anthony Falls Bridge.


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  • Accession Number: 01535406
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 25 2014 11:35AM