UCSD SUCCESSFULLY TESTS BRIDGE RETROFIT DESIGN

A revolutionary concept designed to provide additional strength to double-deck bridges during major earthquakes has been successfully tested by structural engineers at the University of California, San Diego (UCSD) for the California Department of Transportation. A retrofitted, half-scale bridge model was stressed or tested with forces greater than a magnitude 8.0 earthquake on the San Andreas fault, the maximum credible earthquake for San Francisco. The new design features a maximum 8-foot-deep, 4-ft-wide steel reinforced concrete 'edge beam' located on the outside of the structure. This edge beam, framed into circular columns each reinforced by a steel cage surrounding a concrete inner core, provides additional flexibility and strength. A prestressed cap beam, 9-ft deep by 8-ft wide, runs transversely between the columns. In addition, the joints between the columns and beams were redesigned.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0149337X
• Corporate Authors:

  Communication Channels, Incorporated

  6151 Powers Ferry Road, N.W.
  Atlanta, GA  United States  30339-2941
• Publication Date: 1992-1

Media Info

• Pagination: p. 38
• Serial:
  • American City & County
  • Volume: 107
  • Issue Number: 1
  • Publisher: Penton Media
  • ISSN: 0149-337X

Subject/Index Terms

• TRT Terms: Bridge decks; Bridge design; Bridges; Earthquake resistant design; Earthquake resistant structures; Retrofitting; Structural design
• Uncontrolled Terms: Double deck bridges
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00618904
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 29 1992 12:00AM