EARTHQUAKE RETROFIT OF CALIFORNIA BRIDGE: ROUTE 242/680 SEPARATION

The California Department of Transportation is currently implementing a statewide earthquake retrofit program. The goals of the program are to improve structural ductility and to provide corrective measures to the factors that contributed to the major damage and collapse of bridges during the San Fernando and Loma Prieta earthquakes. A case study of a retrofit design project of a bridge located in the San Francisco Bay area, in proximity of the Concord fault, is described. The structure type, geometry, traffic volumes, and maximum credible earthquake led to many difficulties in the analysis and resulted in solutions that were complex and unique for a bridge structure. The bridge investigated consists of two very different structure types joined by a voided pier that serves as a central abutment for both. The focus is primarily on the south structure, where base isolation was used, in contrast to the more conventional retrofit techniques used for the north structure.

Language

  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 101-107
  • 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: 00711715
  • Record Type: Publication
  • ISBN: 0309061091
  • Files: TRIS, TRB
  • Created Date: Sep 6 1995 12:00AM