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Characterization of random fields and their impact on the mechanics of geosystems at multiple scales
 

Summary: Characterization of random fields and their impact on the
mechanics of geosystems at multiple scales
Qiushi Chena
, Andrew Seifriedb
, Jos´e E. Andrade a
, and Jack W. Bakerb
a
Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA
b
Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, USA
Abstract
The behavior of particulate media, such as sands, is encoded at the granular-scale and hence meth-
ods for up-scaling such behavior across relevant scales of interest--from granular-scale (1mm) to
field-scale (>1m)--are needed to attain a more accurate prediction of soil behavior. Multi-scale
analysis is especially important under extreme conditions such as strain localization, penetration
or liquefaction, where the classical constitutive description may no longer apply. In this paper,
internally-consistent probabilistic models for undrained shear strength and Young's modulus are
developed at multiple scales, and incorporated into a simulation framework where refinement of
the material description to finer scales is pursued only as neccessary. This probabilistic simula-
tion approach is then coupled with the finite element method. Numerical examples are presented to

  

Source: Andrade, Jose - Department of Civil and Environmental Engineering, Northwestern University

 

Collections: Engineering