In Situ Dynamic Characterization Of Soils By
Means Of Measurement Uncertainties And
Random Variability
Author(s)
G. Vessia & C. Cherubini
Abstract
In situ dynamic characterization of natural granular soils by means of VS values
is accomplished by direct and indirect investigation techniques. Integration
among those types of field test are encouraged by Eurocode 8 through
correlations amongst VS and NSPT but this does not suggest the best correlation
formulation among the ones presented over the last thirty years. Besides such
correlations can provide highly disperse values of VS. Thus a rational design of
investigation campaign and measurement interpretation and calculations appears
to play an important role in dynamic characterization of granular soils
accomplished by in situ tests. It should rely on selecting the best fitting
correlation formulations site by site according to soil types, their random
structures and the characteristics of investigation techniques measured dynamic
soil properties. An application of statistical approach to the issues previously
sketched is carried out in the Pomigliano d’Arco urban area where Down-Hole
and Standard Penetration tests were performed for dynamically characterizing
the foundation soils. Assessment of uncertainties in VS values should allow the
performance of hazard analyses and reliability-based design in seismic areas.
Keywords: Down-Hole tests, SPT, model uncertainty, NSPT-VS relations,
measurement errors.
1 Introduction
Dynamic characterization of granular soils at low strain level is the first step of
seismic response analyses or of soil basement dynamic classification whenever is
needed for building designing activity in urbanized areas. Various \“in field”
Keywords
Down-Hole tests, SPT, model uncertainty, NSPT-VS relations,
measurement errors.
Related Book
Other papers in this volume
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