Fatigue testing of galvanized and ungalvanized socket connections.

Details

• Creators:
  Ocel, Justin M.
• Corporate Creators:
  United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center
• Subject/TRT Terms:
  • Sign supports
  • Poles (Supports)
  • Welds
  • Fatigue tests
  • Specimens
  • Galvanizing
  • Structural connection
• Publication/ Report Number:
  FHWA-HRT-14-066
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development
• Abstract:
  The fatigue resistance of welded traffic signal support structure details is an ongoing research topic being ; addressed at multiple universities primarily through state funding mechanisms. Fatigue problems with these ; structures have plagued multiple states, and a handful of collapses are identified in the open literature. Some ; premature failures have been hypothesized to have been caused by cracking in the zinc metal bath during ; galvanizing. This led to a fatigue testing matrix of socket connection geometries in a galvanized and ; ungalvanized state. Specimens were attained from two different pole manufacturers and fabricated using their ; own techniques. This report describes how the specimens were tested along with the results showing the ; difference in fatigue life between galvanized and ungalvanized structures. Generally, the galvanized specimens ; showed a one-category reduction in fatigue life versus identical specimens that were not galvanized.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28048/dot_28048_DS1.pdf
• File Type:
  [PDF - 5.47 MB]
• Collection(s):
  Federal Highway Administration ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:acfc6c4ba0f1e0ee5ac0e4d372dcc2a17ff960e1be80ea528e7b4584aa04f62875bd48e4c7180d3c6a35dc940e4419d0b08b3d1f2fd40d7629e64789083c7760