BRIDGE FAILURE ON THE CHICAGO TRANSIT AUTHORITY'S DAN RYAN LINE

Discovery of a crack in one of the box-girder bents supporting a CTA elevated structure over a railroad resulted in discovery of similar failures in adjacent portions of the welded steel elevated line. Temporary repairs to restore the line to service, permanent repairs and factors involved in what was initially a fatigue crack in a weld propagated by reduced fracture toughness at low temperature and stresses generated by restraints within the welded assembly are all discussed.

  • Supplemental Notes:
    • Seventy-eighth Technical Conference, American Railway Engineering Association, March 26-28, 1979, Palmer House, Chicago.
  • Corporate Authors:

    American Railway Engineering Association

    59 East Van Buren Street
    Chicago, IL  United States  60605
  • Authors:
    • Koncza, L
  • Publication Date: 1979-6

Media Info

  • Features: Figures;
  • Pagination: p. 392-402
  • Serial:
    • AREA BULLETIN
    • Volume: 80
    • Issue Number: 673
    • Publisher: American Railway Engineering Association

Subject/Index Terms

Filing Info

  • Accession Number: 00300722
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Oct 17 1979 12:00AM