Journal
COMPUTERS AND GEOTECHNICS
Volume 86, Issue -, Pages 95-107Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2017.01.006
Keywords
Anisotropy; Cross correlation; Random field; Slope stability; Reliability analysis; Geotechnical uncertainty
Categories
Funding
- Research Grants Council of the Hong Kong Special Administrative Region [16202716, C6012-15G, T22-603/15N]
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A geotechnical problem that involves several spatially correlated parameters can be best described using multivariate cross-correlated random fields. The joint distribution of these random variables cannot be uniquely defined using their marginal distributions and correlation coefficients alone. This paper presents a generic methodology for generating multivariate cross-correlated random fields. The joint distribution is rigorously established using a copula function that describes the dependence structure among the individual variables. The cross-correlated random fields are generated through Cholesky decomposition and conditional sampling based on the joint distribution. The random fields are verified regarding the anisotropic scales of fluctuation and copula parameters. (C) 2017 Elsevier Ltd. All rights reserved.
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