Modeling for Finite-Element Soil-Structure Interaction Analysisby A. H. Hadjian, Bechtel Power Corp, Los Angeles, CA, USA,
S. T. Lin, Bechtel Power Corp, Los Angeles, CA, USA,
J. E. Luco, Bechtel Power Corp, Los Angeles, CA, USA,
Abstract: The modeling for finite-element soil-structure interaction analysis for embedded structures is evaluated in an attempt to resolve the issue related to the elevation at which design ground motion should be specified. Based on the premise that the design ground motion in large excavations should tend to become identical to that on the free-surface, a finite-element model is recommended in which the rigidity of the basemat must be incorporated and which has a contoured bottom that reflects the excavation at the surface. With this model the design ground motion should be specified at the free-surface.
Subject Headings: Finite element method | Ground motion | Terrain models | Soil structures | Mathematical models | Soil dynamics | Dynamic structural analysis | Structural models
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