Affiliation:
1. Department of Geotechnics, Hydroengineering, Underground- and Water-Structures , Wroclaw University of Science and Technology , Wyb. Wyspianskiego 27 , Wroclaw , Poland
Abstract
Abstract
Effects of spatial fluctuations of soil parameters are considered in a new context – considering variability of soil parameters in conjunction with non-uniform stress fields, which can locally amplify (or suppress) subsoil inhomogeneities. In this way, several design situations for the Coulomb frictional material with random tan(φ(x)) reveal a reduction of variance, which is less significant than for the standard volume averaging. When looking for an ‘effective’ random variable [tan(φ)]a – that is, a random variable, which is equivalent to the random field tan(φ(
x
)) – the Vanmarcke averaging by simple volume integrals is insufficient; it systematically overestimates effects of variance reduction, thus causing potentially unsafe situations. The new proposed approach is coherent, formally defined and more realistic.
Subject
Computers in Earth Sciences,Mechanics of Materials,Geotechnical Engineering and Engineering Geology,Civil and Structural Engineering
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