AASHTO: Recommended LRFD Guidelines for the Seismic Design of Highway Bridges

[Ultra Zone]

Recommended LRFD Guidelines for the Seismic Design of Highway Bridges

American Association of State Highway and Transportation Officials (AASHTO) Highway Subcommittee on Bridge and Structures
Prepared by: Roy A. Imbsen TRC/Imbsen & Associates, Inc. May 2006

The seismic design specifications included in the current AASHTO LRFD Bridge Design Specifications, Third Edition (2004) with 2006 Interim Revisions and the AASHTO Standard Specifications for Highway Bridges, Division I-A, 17th Edition (2002) with Errata March 2005 are essentially the recommendations that were completed by the Applied Technology (ATC-6) in 1981 and adopted by AASHTO as a “Guide Specification” in 1983. In 1990 AASHTO adopted the Guide Specification (i.e., ATC-6/Division I-A) as part of the AASHTO Standard Specification for Highway Bridges. Some minor revisions were made for their inclusion into the AASHTO LRFD Bridge Design Specifications. There have been some significant changes that have occurred in seismic design since the adoption of ATC-6. Recognizing the availability of improvements as documented in NCHRP 12-49, Caltrans Seismic Design Criteria (SDC) 2004, SCDOT – Seismic Design Specifications for Highway Bridges, 2002 and related research projects, the T-3 AASHTO committee for seismic design has, with the financial support of NCHRP, initiated this project to update the Recommended LRFD Guidelines for the “Seismic Design of Highway Bridges” May 2006.

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[poolmand]

Recommended LRFD Guidelines for the Seismic Design of Highway Bridges + Task 6 Report for Updating

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