EVALUATION OF FATIGUE-SENSITIVE DETAILS USED IN MOLINE VIADUCT, ILLINOIS

A comprehensive study was undertaken to assess the performance of fatigue-sensitive details used in the Moline Viaduct. This 26-span, 872-m (2,860-ft) structure constructed in 1973 is located on Interstate 74 in Rock Island County, Illinois. The complex bridge superstructure includes variations in span length and width along with curved and superelevated geometries. The superstructure is fabricated from ASTM A36 steel and includes longitudinal plate girders supported by box-shaped cross-girders at the mainline piers. The cross-girder extends continuously through the web plates of the longitudinal girders. Full-penetration welds are used to complete the girder to cross-girder connection. This detail is considered potentially fracture sensitive by an FHWA notice dated April 24, 1978. This notice was issued following the brittle fracture of several steel support bents of the Chicago Transit Authority's Dan Ryan Transit Structure in January 1978. A brief discussion of these brittle fractures is presented to introduce the fatigue behavior characteristics of slotted member bridge details. Examination of the structure revealed a number of cracking problems at the girder to cross-girder connection. In addition, various fatigue-sensitive conditions were identified in the cross-girder interior. Field testing indicated that nominal stress ranges in the vicinity of fatigue-sensitive details were below the crack growth threshold and crack growth should not occur. However, preventive retrofit recommendations and a surveillance program were recommended to address cracking and nonconformance items.

Language

  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 291-303
  • Monograph Title: FOURTH INTERNATIONAL BRIDGE ENGINEERING CONFERENCE, SAN FRANCISCO, CALIFORNIA, AUGUST 28-30, 1995. CONFERENCE PROCEEDINGS, 2 VOLUMES
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00711734
  • Record Type: Publication
  • ISBN: 0309061091
  • Files: TRIS, TRB
  • Created Date: Sep 6 1995 12:00AM