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

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 steels. Also, toughness requirements for HAZs of welded structural steels are not covered in AASHTO 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. Recent work completed under NCHRP Project 10-95 provided a review of some of the issues related to the toughness of HAZs of welded structural steels and proposed a preliminary research plan for identifying toughness requirements of welded structural steels used in highway bridges (see Special Note A). However, additional research is needed to further define and address the issues associated with toughness of HAZs, and to develop the proposed toughness requirements. 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.

• Record URL:
  http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=4115

Language

• English

Project

• Status: Completed
• Funding: $425000
• Contract Numbers:

  Project 10-95A

• Sponsor Organizations:

  National Cooperative Highway Research Program

  Transportation Research Board
  500 Fifth Street, NW
  Washington, DC  United States  20001

  American Association of State Highway and Transportation Officials (AASHTO)

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

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Project Managers:

  Hanna, Amir

• Performing Organizations:

  University of Kansas

  ,    
• Principal Investigators:

  Collins, William

• Start Date: 20160919
• Expected Completion Date: 20230131
• Actual Completion Date: 20230131

Subject/Index Terms

• TRT Terms: Heat affected zone (Metals); Highway bridges; Specifications; Structural steel; Toughness; Weld strength
• Identifier Terms: American Association of State Highway and Transportation Officials
• Subject Areas: Bridges and other structures; Construction; Highways; Materials;

Filing Info

• Accession Number: 01730776
• Record Type: Research project
• Source Agency: Transportation Research Board
• Contract Numbers: Project 10-95A
• Files: TRB, RIP
• Created Date: Feb 10 2020 7:34PM