Draft LRFD Guidelines for Seismic Design of Bridges Now Available
A preliminary version of the new Recommended LRFD Guidelines for the Seismic Design of Highway Bridges (including Part I: Specifications, Part II: Commentary and Appendices, USGS CD-ROM entitled "Seismic Hazard Curves and Uniform Hazard Response Spectra for the United States," and instructions for using the CD-ROM with the Guidelines) are available for a limited time through MCEER. A final, published version of these documents, along with several detailed design examples demonstrating their application and use, are planned for publication in 2003.
The guidelines contain recommended specifications for the seismic design of highway bridges. They were developed on the basis of work conducted by a joint venture between MCEER and the Applied Technology Council (ATC), sponsored by the National Cooperative Highway Research Program (NCHRP) of the Transportation Research Board, under NCHRP Project 12-49, "Comprehensive Specifications for the Seismic Design of Bridges." The provisions are currently under review for possible adoption as an AASHTO Guide Specification. They are performance-based, and address state-of-the-art aspects of highway bridge seismic design, including the latest approaches for representation of seismic hazard, design and performance criteria, improved analysis methods, steel and concrete superstructure and substructure design and detailing, and foundation design.