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|Authors: ||Foti, S.*|
Di Giulio, G.*
|Title: ||Surface wave surveys for seismic site characterization of accelerometric stations in ITACA|
|Issue Date: ||2010|
|Keywords: ||seismic site characterization|
Surface wave surveys
|Abstract: ||This paper reports on site characterization for a set of accelerometric stations of the RAN
(Italian accelerometric network) with specific attention to the shear wave velocity profile. The latter is
indeed of primary importance for the usability of the accelerometric database. Surface wave analysis
has been chosen as the primary investigation method since it offers the possibility of reaching the
required accuracy with reasonable costs. A range of different techniques, both of the active-source and
passive-source types, has been adopted to cope with the objectives of the characterization in relation
to specific geological settings. Quality assessment of experimental data has been implemented to check
the consistency of the measurements also with respect to the fundamental hypotheses of the method.
Strategies to improve the reliability and robustness of the surface wave data inversion were exploited
in order to mitigate problems arising from solution non-uniqueness and influence of higher modes in
the propagation. Comparisons with independent borehole tests, available at some specific sites,
confirm the reliability of the results.
Although the research program covered only a subset of the network, the obtained results show the
importance of specific experimental investigations aimed at estimating the shear wave velocity profile.
Indeed the results lead to a re-classification of several sites with respect to the preliminary
classification based on local geology. Within this context, four selected case histories are reported in
the present paper.|
|Appears in Collections:||Manuscripts|
04.02.06. Seismic methods
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