Research for AASHTO Standing Committee on Highways. Task 193. LRFD Guidelines for the Seismic Design of Highway Bridges, Version 2

"Recommended LRFD Guidelines for the Seismic Design of Highway Bridges" (the Guidelines) were produced as an outcome of NCHRP Project 12-49. These Guidelines were submitted to the AASHTO Bridge Subcommittee for final review and possible adoption in May 2002. The Guidelines were evaluated through trial designs from the states of New Jersey, New York, Washington, Alaska, California, Georgia, Arkansas, Oregon, South Carolina, Tennessee, Missouri, Illinois and Nevada. Subsequent to this evaluation, unresolved issues have kept the Guidelines from being adopted by the Subcommittee. Primary issues include the seismic hazard level, the increased seismic design effort required for bridges in some states, and complexity of the Guidelines for bridge engineers in the majority of states. Additionally, as NCHRP Project 12-49 was being completed, other new developments surfaced which should now be considered in any revision of the Guidelines. Some work has been done during the past year under Federal Highway Project 094 to develop a road map for this effort (Task F3-4) and to begin to achieve a consensus on outstanding technical issues (Task F3-5). Nevertheless, the actual work to produce the updated document is outside the scope of Project 094. Task 193 will build on the extensive technical studies completed under NCHRP Project 12-49 and reformat the guidelines that were produced under that project to have the "look and feel" of the current South Carolina Seismic Design Criteria in order to facilitate use by practicing engineers. Additionally, material from the Caltrans Seismic Design Criteria (SDC), ATC-32 and other state agencies will be integrated into the guidelines as appropriate. This project will provide user aids such as flowcharts, maps and charts. The road map and suggested approach developed under FHWA Highway Project 094 shall be used as a guide.


  • English


  • Status: Completed
  • Contract Numbers:

    Project 20-07, Task

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590

    American Association of State Highway & Transportation Officials

    444 North Capitol Street, NW, Suite 225
    Washington, DC    20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  USA  20001
  • Project Managers:

    Beal, David

  • Performing Organizations:

    Imbsen and Associates, Incorporated

    9912 Business Park Drive, Suite 130
    Sacramento, CA  USA  95827
  • Start Date: 20041222
  • Actual Completion Date: 20060701
  • Source Data: RiP Project 11701

Subject/Index Terms

Filing Info

  • Accession Number: 01460596
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 20-07, Task
  • Files: RiP, USDOT
  • Created Date: Jan 3 2013 1:33PM