PERFORMANCE OF SLIDING BRIDGE BEARINGS

An experimental program to evaluate the performance of sliding bridge bearings is described. Tests were conducted in a fixture specially constructed to simulate actual field conditions. Vertical load, up to 250 kips, was applied through a roller nest to the top flange of a 33-in.-deep girder directly over the test bearing. A closed-loop hydraulic testing system was used to apply the horizontal (friction) force. Data were accumulated and processed in real time using a microcomputer-based data acquisition system. Results are presented for three types of tetrafluoroethylene (TFE) elements on two steel surfaces with two backing types, and for new and used self-lubricating bronze expansion bearings. Comparison of results with published design recommendations shows that the recommendations are not conservative for certain TFE-type bearings but are adequate for self-lubricating bronze expansion bearings.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 12-20
  • Monograph Title: Bridges and foundations
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00399170
  • Record Type: Publication
  • ISBN: 0309037646
  • Files: TRIS, TRB
  • Created Date: Jan 31 1986 12:00AM