Relationship between monotonic and cyclic behavior of saturated soft clay in undrained triaxial compression tests

Cyclic loading–induced deformation of soil is a common problem in engineering practice. In current practice, however, monotonic triaxial tests are more commonly used due to the availability apparatus and ease operation. Thus, it would be very useful practical if could evaluate behavior under cyclic loading. This study aims find an explicit relationship between saturated soft clay. Six nine compression were conducted on undisturbed clay undrained condition. The test results showed that shared same stress–strain surface three-dimensional p?–q–? space (p?, effective mean principal stress; q, deviatoric ? , axial strain). It was also found possible stress states at two specific numbers cycles, using corresponding tests. Based these findings, simple procedure proposed predict peak strain for different loadings based only one test, which further verified against additional data from previous literature.