Galvanizing Effect on the Fatigue Performance of Sign and Signal Socket Connection Details

In 2007 a failed Virginia cantilevered sign pole was forensically investigated at Turner-Fairbank Highway Research Center. The investigation yielded inconclusive results, but evidence of zinc on the fracture surface raised a suspicion that a crack may have been preexisting from fabrication. In discussions with industry there appeared to be a growing problem in the US with hot-cracking or liquid metal embrittlement of these details. This project was a first step to addressing the concern, that being to define the reduction in fatigue strength due to galvanizing of socket connection details.

Language

• English

Project

• Status: Active
• Funding: $125000.00
• Sponsor Organizations:

  Federal Highway Administration

  Turner-Fairbank Highway Research Center
  McLean, VA  United States  22101
• Project Managers:

  Ocel, Justin

• Performing Organizations:

  Federal Highway Administration

  Turner-Fairbank Highway Research Center
  McLean, VA  United States  22101
• Principal Investigators:

  Ocel, Justin

• Start Date: 20080701
• Expected Completion Date: 0
• Actual Completion Date: 20110101
• Source Data: RiP Project 26820

Subject/Index Terms

• TRT Terms: Ball and socket joints; Fatigue (Mechanics); Fatigue strength; Poles (Supports); Sign supports
• Uncontrolled Terms: Cantilevered traffic structures; Socket joint
• Geographic Terms: Virginia
• Subject Areas: Bridges and other structures; Construction; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 01461327
• Record Type: Research project
• Source Agency: Federal Highway Administration
• Files: RIP, USDOT
• Created Date: Jan 3 2013 1:43PM