Skip Top Navigation

Research Reports

Bridge Seismic Retrofit Planning Program


This report documents a study that determined the effectiveness and cost of both previously used and proposed bridge superstructure seismic retrofit methods, including longitudinal joint restraining, transverse bearing restraining, bearing seat extension, replacement of vulnerable bearings with conventional bearings, and replacement with base isolation. In addition, a procedure was developed for systematically prioritizing the state's bridges for seismic retrofitting on the basis of their importance as lifelines and their vulnerability to collapse.



  • Date Published: December, 1991
  • Publication Number: WA-RD 217.1
  • Last Modified: September 26, 2007
  • Authors: Khossrow Babaei, Neil M. Hawkins.
  • Originator: Washington State Transportation Center (TRAC)
  • # of Pages: 94 p., 1,981 KB (PDF)
  • Subject: Bridge bearings, Bridge superstructures, Costs, Earthquake resistant design, Longitudinal joints, Measures of effectiveness, Retrofitting, Strategic planning.
  • Keywords: Bridge, earthquake, retrofitting, superstructure, prioritizing, cost.
  • Related Publications:

This abstract was last modified April 29, 2008