Study of the Cyclic Behavior of Saturated Sand Considering the Effect of Induced Anisotropy

The cyclic behavior of saturated sand is studied in this paper using Firouzkooh sand. In order to evaluate the effect of induced anisotropy total number of 30 cyclic triaxial tests were programmed such that in addition to the occurrence of different types of liquefaction, investigation of the anisotropy effect after consolidation and stress reversal could be studied. Induced anisotropy extent is analysed by its effect on the liquefaction potential using Cyclic Stress method. The results show that the sand exhibits much more softening behavior in extensional mode which shows the importance of this phenomenon in the liquefaction susceptibility assessment of saturated sands. Finally, the reversal coeffitient index (rc) is introduced in this paper which indicates that in addition to anisotropy, the deviator stress reversal affects the soil behavior.