Constitutive description of interface behavior including cyclic loading and particle breakage within the framework of critical state soil mechanics

Abstract

SUMMARYThe cyclic behavior of soil-structure interface can be very important in dynamic problems. The cyclic behavior of soil-structure interface may be nonlinear, which includes hysteresis, hardening, degradation, and particle breakage. The breakage of granular soil particles during shearing of granular soil-structure interface is associated with cyclic degradation and can be critical to the dynamic behavior of soilstructure system. The critical state soil mechanics concept formerly used to simulate the nonlinear monotonic behavior of granular soil-structure interface was modified and extended to describe the cyclic behavior, especially soil-particle breakage and degradation during cyclic shearing. Soil-particle breakage was assumed to relate to the energy consumption during cyclic shearing and the critical state line of the soil-structure interface was assumed to translate with the consumption of shearing energy during cyclic shearing as the threshold value is attained. The model was formulated in the framework of generalized plasticity and is capable of describing the salient features of granular soil-structure interface under cyclic loading. Most of the model parameters have straightforward physical meanings and are calibrated using monotonic or cyclic interface test results. The proposed model was calibrated and validated against published test results. The dependency of interface behavior on stress path and cyclic degradation can be successfully described by the proposed model.

Numerical modelling of transient cyclic vertical loading of suction caissons in sand

“…The possibilities of improving the results are numerous and, among them, the implementation of a constitutive law describing the evolution of the friction angle of the soilcaisson interface should be interesting (Liu & Ling, 2008).…”

3D zero-thickness coupled interface finite element: Formulation and application

“…The Mohr-Coulomb criterion is adopted for that purpose. However interested reader should refer to [75,39,41] for a deeper insight into more 220 accurate constitutive laws.…”

“…of shear-induced dilatancy [35,40,41]. The second improvement is the definition of experimental relations characterising the fluid flow within the rock joints [42,43].…”

“…Dilatancy of the interface is also a crucial issue. This 135 was extensively studied in case of rock joints [57,58] and soil-structure interfaces [40,41].…”

Modeling of sand–structure interfaces under rotational shear

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