Dynamic centrifugal model test correlated with the effect by earthquake history on cone penetration resistance and soil liquefaction strength

Abstract

There were a lot of damages caused by the liquefaction in younger artificial ground due to the 2011 off the Pacific coast of Tohoku Earthquake. This is considering to be the result which was affected by “effects of asing” of liquefaction strength on the grounds of different sediments of reclaimed ages. It is considered various factors for specific action on sand aging effect, but in this study, we conducted the dynamic centrifugal model tests which focused on the earthquake history. It has been evaluated the effect on the liquefaction strength caused by earthquake from analysis and comparison of differences of excess pore water pressure between in case with earthquake history and in case without one. The results of the experiment were organized by its relationship among the liquefaction strength rate, relative density and corn penetration resistance, in addition to the ratio of earthquake history and liquefaction strength. The results remarkably showed a rise of liquefaction strength by the earthquake history, but not by the corn penetration resistance. The findings of this study indicate the importance of estimating the liquefaction strength added the effect of asing, because earthquake history has a great impact on the liquefaction strength.