This paper discusses the completed, ongoing and planned actions to assess and preserve the main cables of the Anthony Wayne Bridge. The AWB is undergoing an extensive rehabilitation in two phases. First the approaches will be replaced and superstructure will be rehabilitated. The bridge will be closed for eighteen months during this phase. Upon completion of the superstructure rehabilitation, steps to preserve main suspension cables will be taken. Prior to taking action to preserve cables, however, it is necessary to evaluate the condition of the cables and determine ways to monitor the degradation in cables’ strength over time over the life of the bridge..
Invasive inspection based on NCHRP-534, acoustic emission reports and location of past inspection windows was carried out on total of four panels in November 2012. The laboratory tests on wire samples taken from inspection have been used to predict the strength and aging of the cables. The cables have been acoustically monitored for potential wire breaks continuously since July 2011. During superstructure rehabilitation, wire break monitoring will continue and field studies of invasive and noninvasive corrosion detection techniques will be performed. Based on this, the approach to long term maintenance of the cable will be selected.
1. Bloomstine, M. L. (2011). “Main Cable Corrosion Protection by Dehumidification–Experience, Optimization
and New Development.” Modern Techniques in Bridge Engineering: 39.
2. Burgess & Nipple, I. (2008). “Physical condition report of bridge no. LUC-2-1862.” Prepared for Ohio
Department of Transportation.
3. Cable Technologies North America (2013), “Non-Destructive Evaluation of Bridge Cables Using the Magnetic
Main Flux Method (MMFM)”, presentation at the University of Toledo, September.
4. Cuddy, M. (2000), “Cable Wrap Protection for Suspension Bridges”, Civil Engineering News, Volume: 12,
Issue Number: 7,. 68-71Deeble Sloane, M., Betti, R., Marconi, G., Hong, A., and Khazem, D. (2013).
“Experimental Analysis of a Nondestructive Corrosion Monitoring System for Main Cables of Suspension
Bridges,” J. Bridge Eng., 18(7), 653–662.
5. ElBatanouny, M.K., Mangual, J., Ziehl, P., and Matta, F. (2014), “Early Corrosion Detection in Prestressed
Concrete Girders Using Acoustic Emission,” Journal of Materials in Civil Engineering, V. 26, No. 3, March, pp.
6. Forth Estuary Transport Authority, 2010, “Main Cable Update Report” Presented at Meeting August 27th.
www.edinburgh.gov.uk/download/meetings/id/114/main_cable_-_update, accessed July 13, 2014.
7. Gostautas R. (2011). “Anthony Wayne Bridge: Acoustic Emission Report.” Prepared for ARCADIS/ ODOT by
8. Layton, K. (2013). “An Evaluation of Monitoring and Preservation Techniques for the Main Cables of the
Anthony Wayne Bridge.” MS Thesis, University of Toledo.
9. Mayrbaurl, R. M. and S. Camo. (2004) “Guidelines for Inspection and Strength Evaluation of Suspension
Bridge Parallel Wire Cables.” National Co-operative Highway Research Program Report, NCHRP 534.
10. Modjeski & Masters, (2013A)”The Anthony Wayne Bridge over the Maumee River: 2013 Cable Strength
Evaluation Report. “ Prepared for ODOT.
11. Modjeski & Masters, (2013B)”The Anthony Wayne Bridge over the Maumee River: 2013 Cable Preservation
Report. “ Prepared for ODOT.
12. Niroula, K. (2014) “Acoustic Monitoring of the Main Suspension Cables of the Anthony Wayne Bridge.” MS
Thesis, University of Toledo.
13. Sloane, M., Betti, R., Marconi, G., Hong, A. H., & Khazem, D. (2012). “Main Cable Corrosion Monitoring for
Suspension Bridges Using a Nondestructive Sensing System.” Structural Materials Technology Conference
(SMT): NDE/NDT for Highways and Bridges, The American Society for Nondestructive Testing, Inc. (ASNT),
Columbus, OH, 321-329.