Tsunami Workshop

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Tsunami Workshop

• Oregon State University
• Structure Planning and Design

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California Seismic Safety Commission

• Tsunami Threat to California, December 2005

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• Present building codes and guidelines do not
  adequately address the impacts of tsunamis on
  structures. Currently available tsunami
  inundation maps are not appropriate for code or
  guideline applications.

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Tsunami Workshop

• Continue to work with federal agencies to develop
  guidelines for structures to resist both strong
  ground motion and tsunami wave impact.

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Tsunami Workshop

• Engineering standards can create buildings and
  port structures more resistant to damage.

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Tsunami Workshop

• US building codes generally have not addressed
  the subject of designing structures in tsunami
  zones.

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Tsunami Workshop

• Crescent City, California, has extensive history
  of damage from tsunamis.
• Prototype data available for 1964 and 1960
  tsunamis.
• Extensive water level records during 1960 tsunami.

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Tsunami Workshop

• Other data sources
• Two atomic detonations at Bikini atoll
• A. Above water
• B. Under water

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Tsunami Workshop

• Important effects
• A. Structures and debris
• B. Change in density of fluids
• C. Change in momentum
• D. Effects of water over cliffs and walls

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Tsunami Workshop

• Hydraulic models have unique capabilities to
  resolve tsunami problems