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http://dx.doi.org/10.7843/kgs.2006.22.1.25

Numerical Analysis of Dynamic Centrifuge Model Tests Using an Effective Stress Model  

Park Sung-Sik (Geoenvironment Group, Klohn Crippen Consultants Ltd.)
Kim Young-Su (Dept. of Civil Engrg., Kyungpook National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.22, no.1, 2006 , pp. 25-34 More about this Journal
Abstract
In this study an effective stress numerical procedure is used to assess the results of dynamic centrifuge tests under high effective stress. The centrifuge models consist of loose Nevada sand with an initial vertical effective stress of 380kPa at depth, and they are modeled as a one-dimentional soil column. Liquefaction occurred up to 37m or 22m at depth, and the onset of liquefaction triggering was opposite to the conventional liquefaction evaluation procedure. In other words, liquefaction occurs first at the top and propagates downward as shaking continues. The results observed in centrifuge tests are reasonably predicted by the effective stress model. It is noted that the degree of initial saturation and additional densification at depth arising from the application of the high acceleration field play a key role in capturing the results of dynamic centrifuge tests.
Keywords
Centrifuge test; Densification; Effective stress model; Liquefaction; Saturation;
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Times Cited By KSCI : 1  (Citation Analysis)
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