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Seismic Zonation for Highway Bridge Design


This report includes a state-of-the-art review of seismicity, attenuation characteristics, and seismic zonation in Washington and the Pacific Northwest. Based on this information, a map of velocity-related acceleration coefficients for Washington was developed. The map is in a format suitable for use in the AASHTO highway bridge design procedure. Also, it is based on more detailed seismic and geologic data than the present AASHTO map and was developed specifically for Washington rather than the entire United States. Therefore, the map is suggested as a potential replacement for the present AASHTO map for seismic bridge design in Washington.


  • Date Published: December, 1988
  • Publication Number: WA-RD 172.1
  • Last Modified: September 13, 2007
  • Authors: Jerry D. Higgins, Richard J. Fragaszy, Lawrence D. Beard.
  • Originator: Washington State Transportation Center (TRAC)
  • # of Pages: 168 p., 3,627 KB (PDF)
  • Subject: Bridge design, Bridges, Earthquake resistant design, Earthquakes, Highway bridges, Maps, Seismicity, State of the art studies, Structural design.
  • Keywords: Seismic zonation, Washington (State), Pacific Northwest.
  • Related Publications:

This abstract was last modified April 29, 2008