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Proceedings of the FHWA/NCEER Workshop on the National Representation of Seismic Ground Motion for New and Existing Highway Facilities

Edited by I.M. Friedland,M.S. Power and R.L.Mayes
NCEER-97-0010 | 9/22/1997

The objectives of this FHWA/NCEER Workshop on the National Representation of Seismic Ground Motion for New and Existing Highway Facilities were to: 1) explore a number of important issues involved in national representations of seismic hazard and ground motions for design of highway facilities; 2) recommend future directions for national seismic ground motion representation with respect to these issues, especially for use in nationally applicable guidelines and specifications such as the AASHTO seismic design provisions for bridges; and 3) identify areas where further development and/or research are needed to better define ground motion representation for future guidelines and specifications. The ground motion issues that have emerged in recent years as potentially important to highway facilities design and that were considered at the Workshop were: Issue A: Should new (1996) USGS maps provide a basis for the national seismic hazard portrayal of highway facilities? If so, how should they be implemented in terms of design values?; Issue B: Should energy or duration be used in a design procedure?; Issue C: How should site effects be characterized for design?; Issue D: Should vertical ground motions be specified for design?; Issue E: Should near-source ground motions be specified for design?; Issue F: Should spatial variations of ground motions be specified for design? For each issue, selected Workshop participants prepared papers and made presentations illuminating the issues and proposing a course of action in terms of design criteria and procedures and/or further development. This proceedings volume also contains summaries of group discussions which followed the presentations on each issue. This database offers a record for each of the volume's sixteen papers.