COMPUTATIONAL MODELING OF NONLINEAR SOIL-STRUCTUREINTERACTION ON PARALLEL COMPUTERS

摘要

In order to satisfactorily reproduce the Soil-Structure Interaction (SSI) effects under earthquake loading, itis often necessary to model a large domain of the soil surrounding the structure of interest. Highspatial/temporal resolution is another challenge in analyzing these models. A new parallel nonlinear finiteelement program, ParCYCLIC, is employed to study such high fidelity large-scale SSI models.ParCYCLIC incorporates a constitutive model that has been calibrated by physical tests to represent thesalient characteristics of sand liquefaction and associated accumulation of shear deformations. Thenumerical implementation is designed for distributed-memory parallel computer systems, and allows forperforming explicit as well as implicit time integration. In this paper, a single pile embedded in mildlyinclined, liquefiable soil deposit is analyzed under dynamic base shaking conditions. Aspects of modelresponse, including pore pressure generation/dissipation, soil lateral deformation during liquefaction, andpile displacement and bending moment, are presented and discussed.