THE LOAD SPECTRUM FOR THE FRASER RIVER BRIDGE AT NEW WESTMINSTER, BC

To assure the safety of steel bridges on the Canadian National mainlines carrying more than 10 million gross tons per year, a method of fatigue analysis and prediction has been developed. The 2,000-ft Fraser River Bridge near Vancouver, B.C., which had been built in 1904 was of special concern and was used for the initial study. This paper describes the load spectrum used to analyze the bridge with particular reference to the useful life of the hangers of the main 380-ft span. A firm maximum life could only be established with data on the loads to which the bridge has been and will be subjected. Historical data were scanned to produce the load spectrum for past traffic. Marketing projections were used for future estimates. The effects of unit trains and heavy cars have been studied. Experimental field measurements confirm the applicability of the traffic spectrum evaluation of stress cycles to the bridge members.

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 561-577
  • Serial:
    • Volume: 77

Subject/Index Terms

Filing Info

  • Accession Number: 00139942
  • Record Type: Publication
  • Report/Paper Numbers: Bulletin 658 Proceeding
  • Files: TRIS
  • Created Date: Oct 26 1976 12:00AM