LUC-2-1682 Anthony Wayne Bridge : main cable long term health monitoring.

PDFTech ReportFHWA/OH-2014/1427318Structural health monitoringBridge cablesSuspension bridgesCorrosionAcoustic measuring instrumentsField testsLiterature reviewsState of the artAging (Materials)OhioOhio. Dept. of Transportation. Office of Statewide Planning and ResearchLayton, KyleNims, DouglasUniversity of ToledoUnited States. Federal Highway AdministrationUS Transportation CollectionIn preparation for a large rehabilitation project on the Anthony Wayne Bridge (AWB), the Ohio Department ofTransportation has expressed interest in evaluating monitoring and protection strategies which may extend the lifeof the AWB. This study was proposed and performed in line with this goal. Corrosion of the main cable wasidentified as the driving mechanism for the aging of suspension bridges. Experiments were performed in order todetermine whether or not the existing acoustic monitoring system on the AWB could be used to readily identifyactive corrosion. Results from laboratory testing show that use of acoustic emission to detect corrosion is possibleand promising; however, field experiments indicate that additional tests are needed to determine the practicality ofidentifying corrosion in the field. The upcoming bridge closure will provide a great opportunity for researchers tomore closely examine this possibility. In addition, this report includes literature investigation into other state-of-theartcorrosion monitoring and protection strategies including an internal sensor array, the magnetic main flux methodfor wire inspection, and cable dehumidification