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- Title
Assessing the Effectiveness of Soil Parameters for Ground Response Characterization and Soil Classification.
- Authors
Barani, Simone; De Ferrari, Roberto; Ferretti, Gabriele; Eva, Claudio
- Abstract
The average shear wave velocity over the top 30 m of a soil profile ( VS,30) represents an usual parameter for soil classification in a modern building code for seismic design. In this work the ground response of about 100 soil profiles in Tuscany and Molise (Italy) is studied through 1-D numerical simulations in order to evaluate the reliability of European and Italian soil classifications based on the VS,30 criterion. The amplification factor, Fa , defined here as the ratio of the pseudo-velocity response spectrum intensity (Housner 1952) at the surface, S Is , to the pseudo-velocity response spectrum intensity at the rock outcrop, S Ir , is related to some soil parameters, such as VS,30, the fundamental frequency of vibration of the soil column, F 0, and seismic impedance contrast, Iw . Analyzing the standard deviation of the residual obtained from regression analyses of Fa versus VS,30, F 0, and Iw shows that F 0 is the most helpful parameter for the prediction of Fa . Hence F 0 appears to be more appropriate than VS,30 and Iw for the characterization of the seismic response of a site and, therefore, should not be disregarded in building code soil classifications.
- Publication
Earthquake Spectra, 2008, Vol 24, Issue 3, p565
- ISSN
8755-2930
- Publication type
Article
- DOI
10.1193/1.2946440