This report consists of two parts. Part A, describes the optimization and application of acoustic emission monitoring to the in-process detection, location, and characterization of flaws in welded connections for highway bridges. The microprocessor-based acoustic emission monitoring system developed by GARD, INC. was fabricated and tested in the laboratory on various intentionally induced flaws, in welds which simulated typical highway bridge welded connections. These tests demonstrated the effectiveness of the method, allowed acoustic emission signal processing parameters to be optimized for typical bridge welds, and acoustic emission monitoring application guidelines to be developed. In addition, the Acoustic Emission Weld Monitor was given a brief evaluation in a bridge fabrication shop. Additionally, the tensile, fracture toughness, and fatigue properties were evaluated for the weldments fabricated using steels commonly employed in bridge construction: ASTM A36, A588, and A514. A variety of welding techniques were considered including submerged arc welding (SAW), shielded metal arc welding (SMAW), flux cored arc welding (FCAW), and gas considered for the submerged arc weldments. The results of these tests are presented in Part B. (Author)

  • Corporate Authors:

    Gard, Incorporated

    7449 North Natchez Avenue
    Niles, IL  United States  60648

    Federal Highway Administration

    Turner-Fairbank Highway Research Center, 6300 Georgetown Pike
    McLean, VA  United States  22101
  • Authors:
    • Prine, D W
  • Publication Date: 1984-10

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 304 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00392187
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-83-006 Final Rpt., FCP 35L1-032
  • Contract Numbers: DTFH61-80-C-00083
  • Files: TRIS, ATRI, USDOT
  • Created Date: Feb 28 1987 12:00AM