NUMERICAL ANALYSIS OF SEISMIC BEHAVIOR OF EMBANKMENTS FOUNDED ON LIQUEFIABLE SOILS

摘要

The purpose of this study is to verify the ability of a numerical method to predict earthquake-induced deformation of soil embankments. The method is dynamic response FE analysis that incorporates a cyclic elasto-plastic constitu- tive model for sand, a cyclic elasto-viscoplastic model for clay, and Biot's two phase mixture theory. This method was applied to two sets of case records: 1) a series of dynamic centrifuge model tests of soil embankments resting on liquefi- able sandy soils, and 2) a set of river embankments that were damaged and undamaged during the 1993 Hokkaido Nansei-oki earthquake.