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Effect of static shear on resistance to liquefaction Chern, Jin-Ching


The influence of initial static shear stress on undrained cyclic loading behavior of saturated Ottawa sand has been studied using the triaxial test. Improved sample preparation techniques and testing equipment were employed to obtain samples of uniform density and minimize the effect of sample disturbance. Detailed study of the effective stress paths enabled understanding of the fundamental process leading to liquefaction or strain development. It was found that the resistance to liquefaction or cyclic straining for sand with initial static shear stress can either be higher or lower than that for sand with no initial static shear stress, depending on the relative density and the level of initial static shear stress.

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