Location

San Diego, California

Session Start Date

3-26-2001

Session End Date

3-31-2001

Abstract

Since their introduction into Chinese building codes in the 1970’s, plasticity-based liquefaction criteria have provided a means for evaluating the liquefaction susceptibility of sands with clayey fines. These criteria are used to separate soils that may be considered non-liquefiable from those susceptible to liquefaction. The majority of the proposed criteria contain some minimum requirement regarding clay content and soil plasticity. The results of a parametric study into the effects of plastic fines content and plasticity on the liquefaction susceptibility of sandy soils were used to evaluate the accuracy of several of the more commonly used plasticity-based liquefaction criteria. Most of the proposed criteria were found to have conservative requirements in terms of soil plasticity. Soils meeting the plasticity criteria were found to have very different deformation characteristics under cyclic loading than those soils not meeting the criteria. However, all the criteria reviewed were also found to include other requirements which were not accurate predictors of liquefaction susceptibility. In light of these findings, recommendations are provided for a simplified plasticity-based liquefaction criteria.

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

Share

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

Plasticity Based Liquefaction Criteria

San Diego, California

Since their introduction into Chinese building codes in the 1970’s, plasticity-based liquefaction criteria have provided a means for evaluating the liquefaction susceptibility of sands with clayey fines. These criteria are used to separate soils that may be considered non-liquefiable from those susceptible to liquefaction. The majority of the proposed criteria contain some minimum requirement regarding clay content and soil plasticity. The results of a parametric study into the effects of plastic fines content and plasticity on the liquefaction susceptibility of sandy soils were used to evaluate the accuracy of several of the more commonly used plasticity-based liquefaction criteria. Most of the proposed criteria were found to have conservative requirements in terms of soil plasticity. Soils meeting the plasticity criteria were found to have very different deformation characteristics under cyclic loading than those soils not meeting the criteria. However, all the criteria reviewed were also found to include other requirements which were not accurate predictors of liquefaction susceptibility. In light of these findings, recommendations are provided for a simplified plasticity-based liquefaction criteria.