Location

San Diego, California

Session Start Date

3-26-2001

Session End Date

3-31-2001

Abstract

A review of the Upper and Lower San Fernando dams during the 1971 San Fernando earthquake is presented in light of current understanding of post-liquefaction behaviour. The concepts of liquefaction, limited liquefaction, cyclic mobility, partial drainage, water filming, and mixing are discussed in relation to these dams. Blowcount data is reviewed and the critical zones of hydraulic fill within each dam are found to have comparable values of N1/3-cs. Limit equilibrium and finite difference stress/ deformation analyses support a minimum post-earthquake strength for the dams of approximately 14 to 24 kPa (300 to 500 psf). The importance of partially-drained behaviour to post-liquefaction response is stressed.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fourth Conference

Publisher

University of Missouri--Rolla

Publication Date

3-26-2001

Document Version

Final Version

Rights

© 2001 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Mar 26th, 12:00 AM Mar 31st, 12:00 AM

Observations on the San Fernando Dams

San Diego, California

A review of the Upper and Lower San Fernando dams during the 1971 San Fernando earthquake is presented in light of current understanding of post-liquefaction behaviour. The concepts of liquefaction, limited liquefaction, cyclic mobility, partial drainage, water filming, and mixing are discussed in relation to these dams. Blowcount data is reviewed and the critical zones of hydraulic fill within each dam are found to have comparable values of N1/3-cs. Limit equilibrium and finite difference stress/ deformation analyses support a minimum post-earthquake strength for the dams of approximately 14 to 24 kPa (300 to 500 psf). The importance of partially-drained behaviour to post-liquefaction response is stressed.