American Society of Civil Engineers

Random Field Characterization of NGES Data

by Gordon A. Fenton and Erik H. Vanmarcke

pp. 61-78
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Document type: Committee Report Paper
Part of: Probabilistic Site Characterization at the National Geotechnical Experimentation Sites
Abstract: In this study of the spatial variability of soil parameters, the variation with depth in sixty-seven cone penetrometer test (CPT) soundings from all five National Geotechnical Experimentation Sites (NGES) are statistically analyzed. The aim is to determine the best (global) correlation model to use for characterizing the spatial variability of tip resistance, qc. Analyses based on correlation functions, variograms, variance functions, wavelets, and periodograms of the CPT readings all indicate that qc exhibits fractal behavior in the vertical direction. Also, a tractable band-limited fractal model is offered to characterize and simulate typical CPT data.

ASCE Subject Headings:
Spatial analysis