EVERGREEN POINT BRIDGE MAINTENANCE PROBLEMS

The 1974-79 study of the maintenance problems of the drawspan mechanism of the Evergreen Point Bridge across Lake Washington is reported. The approach was to predict the life of elements by Miner's hyposthesis. For this the strains at critical points and the wind vector were measured over two sessions. These results were correlated with long term wind data to provide the number of cycles in a year at various stress levels. The fatigue capacity of anchor rods was determined by the Prot test on six specimens. The resulting S-N curve was compared to the field measurements to determine the expected life of the rods from the Miner criterion. The methods developed provide useable maintenance procedures for the prevention of fatigue failure of critical structural elements. (Author)

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 39 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00342382
  • Record Type: Publication
  • Report/Paper Numbers: WA-RD-44.1 Final Rpt.
  • Contract Numbers: Y-1640
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Dec 22 1981 12:00AM