RECOMMENDED LRFD GUIDELINES FOR THE SEISMIC DESIGN OF HIGHWAY BRIDGES

摘要

This paper provides an overview of the proposed seismic design provisions that have been developed to replace those currently in use throughout the United States. The proposed provisions include two-level design procedures, advanced analytical tools such as push-over, updated ground motion data, new site characterizations, simplified methods for lower seismicity regions, and more comprehensive liquefaction provisions. The proposed provisions have been tested in trial designs around the country. The focus of the paper is on the concepts incorporated into the proposed provisions and the issues that arise when attempting to establish appropriate and consistent seismic design criteria and procedures.