Nonlinear Cyclic Characteristics of Soils

For this paper, research on nonlinear cyclic characteristics of soils was reviewed. A new model is presented consisting of a modified equation for an initial loading curve and a modified equation for constructing the hysteresis loop. The performance of the model was evaluated by simulating the frequently utilized relationships of shear modulus versus shear strain and damping ratio versus shear strain of various types of soils accumulated over the past decades. The outcomes indicated that the new model presented describes the measured relationships with excellent correlations. The new model can simulate not only the work-hardening, but also work-softening behaviors of soils.