Seismic Re-Engineering of the VMT TOEM Committee RCAC Staff - PowerPoint PPT Presentation

Seismic Re-Engineering of the VMT TOEM Committee RCAC Staff Seismic Hazards Safety Commission Tom Kuckertz 1/27/2006 Board Meeting

Seismic Re-Engineering of VMT • Scope of Seismic Re-engineering Project • Seismic Hazards Safety Commission – SHSC Members Appointed Only Recently – HB-83 Extends Sunset Provisions for SHSC – PWSRCAC Has Interest in Addressing Seismic Hazards at VMT • Action Requested – Resolution for Passage of HB-83 1/27/2006 Board Meeting

Three Issues Are of Concern • Change from TAPS-specific seismic design criteria to criteria based on international standards (IBC-2003/ASCE 7 ) • Potential for catastrophic failure of rock of slopes above VMT • Potential for catastrophic tsunamis at VMT driven by underwater slumping of sediment. 1/27/2006 Board Meeting

Change in Standards Deal with Structural Integrity 1/27/2006 Board Meeting

Potential For Slope Failure? 1/27/2006 Board Meeting

Potential for Tsunami Damage to Berths? 1/27/2006 Board Meeting

Scope of Seismic Re-Engineering Project • Comparison of Standards — Structural Engineering – Verify • Slope Stability Above VMT — Geologic Engineering – Investigate • Underwater sediment slumping – Marine Geophysical Surveying – Investigate 1/27/2006 Board Meeting

Action Requested • Approve resolution supporting retention of the Alaska Seismic Hazards Safety Commission by passage of HB-83. 1/27/2006 Board Meeting

End of Presentation 1/27/2006 Board Meeting