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Probabilistic Evaluation of Liquifaction Potential for Downtown San Francisco

Author/Creator:
Kavazanjian Jr, E (Author)
Roth, RA (Author)
Schezuria, H (Author)
Date created:
May 1983
Type of resource:
Text
Genre:
Technical report
Format:
Book
Abstract:
This report describes the evaluation of the potential of saturated deposits of cohesionless soil in downtown San Francisco for initial liquefaction due to seismically induced pore pressures. The condition of initial liquefaction, or the zero effective stress state, was evaluated because it provides the best available index for damage due to seismically induced pore pressures. Liquefaction potential was evaluated in a probabilistic manner by comparing the conditional probability of liquefaction, or liquefaction susceptibility, to the expected intensity of seismic loading, or liquefaction opportunity. The probabilistic evaluation was made using a liquefaction hazard model developed by Chameau (1980). Results indicate that while no liquefaction is expected anywhere for an intensity with an annual probability of exceedance of 5% (a return period of twenty years), only the densest deposits will survive an event with an annual probability of exceedence of two percent (fifty year return period). For an event with an annual probability of occurrence of 1%, or a hundred year return period, initial liquefaction is expected to occur within all saturated, cohesionless soil deposits in the downtown San Francisco area. It must be emphasized that in dense soil deposits the consequences of initial liquefaction may be minimal because of their limited shear strain potential.
Preferred Citation:
Kavazanjian, Jr, E, Roth, RA and Schezuria, H. (1983). Probabilistic Evaluation of Liquifaction Potential for Downtown San Francisco. John A. Blume Earthquake Engineering Center Technical Report 60. Stanford Digital Repository. Available at: http://purl.stanford.edu/gj700gs7886
Collection:
John A. Blume Earthquake Engineering Center Technical Report Series
Related item:
John A. Blume Earthquake Engineering Center
Subject:
soil
ground motions
probabilistic seismic hazard analysis
Use and reproduction:
User agrees that, where applicable, content will not be used to identify or to otherwise infringe the privacy or confidentiality rights of individuals. Content distributed via the Stanford Digital Repository may be subject to additional license and use restrictions applied by the depositor.
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