Tsunami Effects of the February 27, 2010 Chile Earthquake Ian Robertson, Univ. of Hawaii Gary Chock, Martin & Chock Juan Morla, Martin & Chock March 20,

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Presentation transcript:

Tsunami Effects of the February 27, 2010 Chile Earthquake Ian Robertson, Univ. of Hawaii Gary Chock, Martin & Chock Juan Morla, Martin & Chock March 20, 2010 EERI Survey Debrief Ian Robertson, Univ. of Hawaii Gary Chock, Martin & Chock Juan Morla, Martin & Chock March 20, 2010 EERI Survey Debrief

Tsunami Focus  Team Members:  Ian Robertson, Ph.D., P.E., Professor, University of Hawaii  Gary Chock, P.E., Principal, Martin & Chock Inc.  Juan Morla, P.E., Structural Engineer, Martin & Chock Inc.  Objectives:  Survey coastal region around Concepcion/Talcahuano for tsunami damage  Attempt to distinguish between damage induced by earthquake ground-shaking and tsunami inundation  Determine whether earthquake damage lead to reduction in tsunami resistance  Particular attention on debris impact and scour effects.  Team Members:  Ian Robertson, Ph.D., P.E., Professor, University of Hawaii  Gary Chock, P.E., Principal, Martin & Chock Inc.  Juan Morla, P.E., Structural Engineer, Martin & Chock Inc.  Objectives:  Survey coastal region around Concepcion/Talcahuano for tsunami damage  Attempt to distinguish between damage induced by earthquake ground-shaking and tsunami inundation  Determine whether earthquake damage lead to reduction in tsunami resistance  Particular attention on debris impact and scour effects.

Tsunami Observations  Tsunami damage was highly directional  Timber framed residential structures were destroyed or severely damaged by the tsunami inundation  Reinforced concrete and constrained masonry buildings generally performed well  Significant scour around bridge and building foundations lead to a number of failures  Tsunami-induced fluidization of loose fill material appears to have contributed to wharf and pier failures in Talcahuano bay  Tsunami debris in the form of ships and shipping containers resulted in impact damage to port facilities  Tsunami damage was highly directional  Timber framed residential structures were destroyed or severely damaged by the tsunami inundation  Reinforced concrete and constrained masonry buildings generally performed well  Significant scour around bridge and building foundations lead to a number of failures  Tsunami-induced fluidization of loose fill material appears to have contributed to wharf and pier failures in Talcahuano bay  Tsunami debris in the form of ships and shipping containers resulted in impact damage to port facilities

Tsunami wave heights (NOAA) Feb , 8.8 Eq

Tsunami wave heights (NOAA) May , 9.5 Eq

Map of Survey Area

Housing Devastation Dichato

Housing Devastation Coliumo

Housing Devastation Clean up and Temporary Camps

Evacuation Signs

Building Success Story Dichato

Scour and Fluidization Fish pumping Station, Talcahuano

Scour and Fluidization Warehouse and pier, Talcahuano

Scour Damage

Debris Impact

Debris

Debris Impact