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PMSS Project Details

 

Project ID:FHWA-PROJ-07-0013
Project Name: Fatigue Performance of Rib-to-Deck Welds for Steel Orthotropic Bridge Decks
Status: Active
Contact:
Last Name:Ocel
First Name:Justin
Telephone:202-493-3080
E-mail:justin.ocel@dot.gov
Office: Office of Infrastructure Research and Development
Team:Bridge and Foundation Engineering Team
Roadmap/Focus area(s): Infrastructure Research and Technology Strategic Plan and Roadmap
Project Description:The current American Association of State Highway and Transportation Officials and American Welding Society requirements for rib-to-deck weld require an 80 percent penetration groove weld with no melt or blow through. The need for a highly defined weld is to ensure a geometry with a good fatigue performance. However, in practice this weld is difficult to produce to tolerances commonly put on design plans. This project will determine the fatigue performance of this ideal weld, as well as those made using gas metal arc welding, submerged arc welding, and hybrid laser weld processes of various weld penetrations (fillet, 20 percent, 40 percent, 60 percent, and 80 percent). Finally, welds will also be fabricated with intentional fit-up gaps to ensure they do not adversely affect the fatigue performance.
Laboratories: Structures Laboratory
Start Date: July 1, 2007
End Date: August 1, 2014
Goals:The key project objective was to determine the proper fatigue category based on fit-up tolerances and weld penetration for orthotropic rib-to-deck welds.
Test Methodology: Full-scale experimental
Partners: Federal Highway Administration: Office of Infrastructure - Office of Bridge Technology; Role(s): Other stakeholder
Expected Benefits:The expected benefit is reduced fabrication costs of steel orthotropic decks in the United States.
Deliverables:Name: Final report.
Product Type(s): Techbrief
Description: The final report would include a description of the research methodology, the data collected, interpretations of the data, and recommendations.
Keywords: Orthotropic
Steel Bridges
Bridge Decks
Fatigue Tests
Fatigue Cracking
Infrastructure
Bridges
Welds
Subject Areas: Bridges and other structures
Research