Toughness Requirements for Heat-Affected Zones of Welded Structural Steels for Highway Bridges

American Association of State Highway and Transportation Officials (AASHTO) M 270 (ASTM A709), Standard Specification for Structural Steel for Bridges, covers the chemical, mechanical, and toughness properties of structural steel intended for use in bridges. The AASHTO/AWS D1.5 Bridge Welding Code covers the welding processes and requirements for welded highway bridges, but it does not address the toughness requirements for heat-affected zones (HAZs) of welded structural steel. Also, toughness requirements for HAZs of welded structural steel are not covered in AASHTO Load and Resistance Factor Design (LRFD) Bridge Design Specifications. There is a need to identify the factors affecting the toughness for HAZs of welded structural steels used in highway bridges and determine what toughness requirements are necessary for incorporation in the AASHTO/AWS Bridge Welding Code and the AASHTO LRFD Bridge Design Specifications. This information will ensure that the HAZs will exhibit the toughness properties that are necessary for the intended performance and service life. The objective of this research is to develop proposed toughness requirements for the heat-affected zones (HAZs) of welded structural steels for highway bridges. The research shall deal with steels intended for use in bridges as identified in AASHTO M 270, Standard Specification for Structural Steel for Bridges.


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  • Status: Completed
  • Funding: $500000
  • Contract Numbers:

    Project 10-95

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

    444 North Capitol Street, NW, Suite 225
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Hanna, Amir

  • Performing Organizations:

    Lehigh University

    ATLSS Engineering Research Center
    IMBT Laboratory
    Bethlehem, PA  United States  18015-4729
  • Principal Investigators:

    Roy, Sougata

  • Start Date: 20140801
  • Expected Completion Date: 0
  • Actual Completion Date: 20170131
  • Source Data: RiP Project 37710

Subject/Index Terms

Filing Info

  • Accession Number: 01543618
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 10-95
  • Files: TRB, RiP
  • Created Date: Nov 19 2014 1:02AM