ACOUSTIC EMISSION METHODS FOR FLAW DETECTION IN STEEL IN HIGHWAY BRIDGES, PHASE I

A simple self-contained, battery operated AE monitor concept has been identified, fabricated in breadboard form, evaluated in the laboratory and the field, and demonstrated to be a practical concept for long term monitoring for AE from active flaws on an inservice highway bridge. The unit is capable of monitoring a specific area-flawed or suspect-continuously and unattended. The unit is applicable to monitoring both steel and prestressed concrete bridge members. Laboratory testing with prestressed concrete provided encouragement that detection with acoustic emission of stress corrosion cracking in steel tendons by monitoring on the surface of a concrete beam is feasible. This is partially supported by the detection of stress corrosion cracking in a bare reinforcing rod. Analysis indicated that a signal induced at a specific location on a reinforcing rod will propagate down the rod and then through the concrete to the sensor. Concrete attenuation tests were performed and tabulated. (FHWA)

  • Corporate Authors:

    Batelle Memorial Institute/Pacific Northwest Labs

    Battelle Boulevard, P.O. Box 999
    Richland, WA  United States  99352

    Federal Highway Administration

    Office of Research, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Hutton, P H
    • Skorpik, J R
  • Publication Date: 1975-3

Media Info

  • Pagination: 92 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00308772
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-78- 97 Final Rpt., FCP 35F1-062
  • Contract Numbers: DOT-FH-11-8281
  • Files: NTIS, TRIS, USDOT
  • Created Date: Apr 22 1980 12:00AM