Abstract: Liquefaction is a phenomenon in which the strength
and stiffness of a soil is reduced by earthquake shaking or other rapid
cyclic loading. Liquefaction and related phenomena have been
responsible for huge amounts of damage in historical earthquakes
around the world.
Modeling of soil behavior is the main step in soil liquefaction
prediction process. Nowadays, several constitutive models for sand
have been presented. Nevertheless, only some of them can satisfy this
mechanism. One of the most useful models in this term is
UBCSAND model. In this research, the capability of this model is
considered by using PLAXIS software. The real data of superstition
hills earthquake 1987 in the Imperial Valley was used. The results of
the simulation have shown resembling trend of the UBC3D-PLM
model.