Constitutive Model for Cyclic Behavior of Clays. II: Applications

Development and validation of the hierarchical single δ\N\u*\d0 model for cohesive soils are described in a companion paper, part I. The present paper, part II, first describes the details of the simulation and verification of various stages in the field behavior of piles, e.g., in situ stresses, driving, consolidation, tension tests, and the final cyclic loadings. Undisturbed samples were obtained for testing of cylindrical and cubical specimens, the latter involved design and fabrication of a square, 13×13×13 cm (5×5×5 in.) sampler. Field measurements were obtained in terms of stresses, strains, and pore-water pressures for various stages. The constitutive model (part I) is introduced in a general finite-element (FE) procedure that allows dynamic analysis of porous soil media. The FE procedure is used to back-predict the field behavior. It is found that the numerical procedure provides very good predictions of the measured responses. It is felt that the proposed unified (parts I and II) procedure can provide an excellent tool for a wind range of dynamic soil-structure interaction problems.

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