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The Field Act: Protecting California’s Schools from Seismic Hazards Timothy Dawson Engineering Geologist California Geological Survey, Menlo Park

The Field Act: Protecting California's Schools

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Page 1: The Field Act: Protecting California's Schools

The Field Act: Protecting California’s Schools

from Seismic Hazards

Timothy DawsonEngineering Geologist

California Geological Survey, Menlo Park

Page 2: The Field Act: Protecting California's Schools

Xinjian Primary SchoolKindergarten (left) and Hotel (right) survived with little damage

Du Bin for the New York Times

Page 3: The Field Act: Protecting California's Schools
Page 4: The Field Act: Protecting California's Schools

Newport – Inglewood fault zone

1933 Long Beach Earthquake

• Occurred March 10, 1933, 5:54 PM (timing is everything)

• M 6.4

• 120 fatalities• 120 schools in Long Beach area, 70 destroyed

• $50M (1933 dollars)

Page 5: The Field Act: Protecting California's Schools
Page 6: The Field Act: Protecting California's Schools

Long Beach Polytechnic High School, Long Beach

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Alexander Hamilton Junior High School, Long Beach

Page 8: The Field Act: Protecting California's Schools

Jefferson Junior High School : Worst of the worst?

Page 9: The Field Act: Protecting California's Schools

Compton School

Page 10: The Field Act: Protecting California's Schools

Compton School. Note rain of bricks at the entrance

Page 11: The Field Act: Protecting California's Schools

Stanford School, Long Beach: A reinforced concrete seismic survivor

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Franklin Junior High School, Long Beach

Page 13: The Field Act: Protecting California's Schools

AFTERMATH 1933 - Enactment of the Field Act. Enacted as an on April 10, 1933 one month after the earthquake.

1939 - Enactment of the Garrison Act. Enacted in order to protect public school children in structures built before 1933. However, school districts not required to make necessary inspections.

1967 to Present - Various amendments. Schools required to make necessary inspections and retrofitting or abandonment of unsafe structures.

Geologic investigations required in Alquist-Priolo Zones.

Many other modifications….

Page 14: The Field Act: Protecting California's Schools

Provisions of the Field Act

• Authorizes the State Architect to develop state-wide building code.

• Division of the State Architect (DSA) given authority to approve or reject plans for construction of new schools and alterations to existing buildings.

• California-licensed architect or structural engineer responsible for preparation of plans.

• DSA reviews plans and issues certificate of compliance once project is approved.

• Violation of the provision of the Act is a felony.

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CGS Role in the Field ActUnder contract to DSA to review geotechnical and geological aspects of school sites

Surface fault rupture LiquefactionLandslides

Seismic Design(Ground motion)

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http://www.conservation.ca.gov/cgs/News/Documents/1933_EQ_poster.pdf

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Weblinks to photo sources are in the notes window(Click “View” and “Notes page” in main Powerpoint Menu

Page 18: The Field Act: Protecting California's Schools

Juyuan Middle School