The Effect of Initial Static Shear Stress on the Liquefaction Resistance of Babolsar Sand using Cyclic Simple Shear Tests

The effect of initial static shear stress on undrained cyclic behavior of sand, with special reference to liquefaction, is studied and reported in this paper. The study includes the results of a set of laboratory tests carried out on Babolsar sand samples with relative densities of 20%, 40% and 60% and two different initial normal stresses of 50 kPa and 150 kPa, using cyclic simple shear apparatus. All tests were performed under the constant volume condition. The results of the study show an increase in liquefaction resistance with increase in initial static shear stress for low confinements while the higher confinements result in a complex behavior which is explained in the paper.

کلیدواژه ها:

Initial static shear stress ، Liquefaction resistance ، Cyclic simple shear