EFFECTIVENESS OF HINGE RESTRAINERS AS SEISMIC RETROFIT MEASURE

A summary of (a) the performance of hinge restrainers based on a field investigation of several bridges after the 1989 Loma Prieta earthquake and (b) important aspects of restrainer design for bridges with narrow seat widths is presented. The observed characteristics of restrainer behavior are described. The field investigations showed that the entire restrainer system (which consists of the restrainers, connection hardware, diaphragms, and the superstructure) and not merely the restrainers should be considered at the time of design. The weak link in the system for bridges with narrow seats needs to be the superstructure. The sensitivity studies revealed that small changes in the assumptions made in the design can affect the required number of restrainers. It was also found that the most critical case for restrainer design corresponds to the condition when the restrainer gap is zero, whereas the critical abutment forces during the earthquake may occur when the restrainer gap is maximum.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 71-78
  • 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: 00711712
  • Record Type: Publication
  • ISBN: 0309061091
  • Files: TRIS, TRB
  • Created Date: Sep 6 1995 12:00AM