Abstract
In order to describe the behavior of cyclic loading of unsaturated soils under various boundary conditions, the governing equations for cyclic loading tests were developed, and the cyclic triaxial test and the hollow torsional shear test were performed for the specimens in different initial conditions and under various boundary conditions for pore water and air. From the tests, the cyclic behavior varied depending on the initial and boundary conditions. The developed numerical technique reproduced the cyclic behaviors obtained in the experiments well. Furthermore, the numerical study showed that the influence of the smaller value of the net stress caused decrease of the skeleton stress more easily, and that the liquefaction resistance obtained from the triaxial test and the hollow torsional shear test varied largely.
