Acoustic Monitoring of the Main Cables of the Anthony Wayne Suspension Bridge

The Anthony Wayne Suspension Bridge in Toledo, Ohio is scheduled to undergo a major rehabilitation. These cables have never been opened for a comprehensive wire break inspection since the bridge went into service over 80 years ago. Prior to the rehabilitation, the Ohio Department of Transportation requires the cables to be inspected in accordance with NCHRP – 534. Acoustic Emission (AE) monitoring of the main cables for wire breaks is taking place prior to this invasive inspection. The primary goals of the (AE) monitoring are to: 1) get an overview of the health of the entire cable volume by ascertaining the frequency and location of wire breaks, 2) help identify areas with active corrosion, 3) aid in locating the areas to be inspected invasively, 4) to minimize the locations of invasive inspection, 5) aid in identifying any needs for cable rehabilitation and to assess the utility of long term health monitoring of the cables. The monitoring system consists of AE sensors mounted at 100 foot intervals on each of the main cable. The data is transmitted over the internet and processed in a remote location. The monitoring system, data processing, data collected and the use to the data to achieve the goals are presented in this paper.

1. Mayrbaurl, R.M. and S. Camo. “Guidelines for Inspection and Strength Evaluation of Suspension Bridge Parallel Wire Cables,” National Co-operative Highway Research Program Report, NCHRP 534, 2004. 2. Gostautas, R. “Anthony Wayne Bridge Acoustic Emission Report,” prepared for Arcadis/ODOT District 2 by Mistras Group, Dec. 2011. 3. Waddell & Hardesty. “Bridge Over Maumee, Cables,” revised Nov. 27, 1931. 4. Burgess & Nipple. “Physical Condition Report Bridge No. LUC-2-1862 Bridge No. LUC-2-1862 Anthony Wayne Bridge Over the Maumee River,” prepared for the Ohio Department of Transportation District 2, 2008. 5. Mistras R0.45I-LP-SC-AST sensors htm, accessed May 27, 2012. 6. Mistras Sensor Highway II, aspx, accessed May 27, 2012 7. Cole, P. and J. Watson. “Acoustic Emission for Corrosion Detection,” - 3rd MENDT - Middle East Nondestructive Testing Conference & Exhibition - Bahrain, Manama, Nov 2005, mendt2005/pdf/01.pdf, accessed May 2012. 8. Yuyama, S., T. Kishi and Y. Hisamatsu. “Fundamental Aspects of AE Monitoring on Corrosion Fatigue Process in Austenitic Stainless Steel,” Journal of Materials for Energy Systems, 1984, pp. 212-221, http://www., accessed May 2012.
Usage Shares
Total Views
26 Page Views
Total Shares
0 Tweets
0 PDF Downloads
0 Facebook Shares
Total Usage