Assessing Probability-based Methods for Liquefaction Potential Evaluation
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 128, Issue 7
Abstract
This paper presents an assessment of existing and new probabilistic methods for liquefaction potential evaluation. Emphasis is placed on comparison of probabilities of liquefaction calculated with two different approaches, logistic regression and Bayesian mapping. Logistic regression is a well-established statistical procedure, whereas Bayesian mapping is a relatively new application of the Bayes’ theorem to the evaluation of soil liquefaction. In the present study, simplified procedures for soil liquefaction evaluation, including the Seed–Idriss, Robertson–Wride, and Andrus–Stokoe methods, based on the standard penetration test, cone penetration test, and shear wave velocity measurement, respectively, are used as the basis for developing Bayesian mapping functions. The present study shows that the Bayesian mapping approach is preferred over the logistic regression approach for estimating the site-specific probability of liquefaction, although both methods yield comparable probabilities. The paper also compares the three simplified methods in the context of probability of liquefaction, and argues for the use of probability-based procedures for evaluating liquefaction potential.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 128 • Issue 7 • July 2002
Pages: 580 - 589
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Mar 23, 2001
Accepted: Nov 26, 2001
Published online: Jun 14, 2002
Published in print: Jul 2002
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