ABSTRACT
This paper presents the significance of considering retentive situations of pore water. On the base of the consideration, suction effects for unsaturated soil behavior are integrated to two: the first is that an increase in suction increases effective stresses and the second is that increase in suction enhances yield stresses and affects the resistance to plastic deformations. Elastoplastic models with two suction effects are presented. The typical volume change behavior of unsaturated soils was interpreted by using a simple elastoplastic model among them. We also presented some simulation examples of experimental tests by using a generalized elastoplastic model. The results of simulations agreed well with those of experimental tests.
