Limitations of the Vs30 parameter for the prediction of strong motion
DOI:
https://doi.org/10.21703/0718-2813.2024.35.2794Keywords:
Probabilistic seismic hazard, Site effects, Vs30 limitationsAbstract
The Vs30 parameter, that is, the harmonic average of the S waves in the first 30 meters of the surface, has been extensively used to model the local conditions of a site. However, several studies have shown the deficiencies that this parameter has to effectively predict the strong movement. In the present study, non-ergodic seismic hazard estimates are compared with the same ones made considering Vs30 to show their limitations. It is observed that, in general, for hard soils, the estimates are similar, but for soft soils, great differences are observed. This is accentuated for soils with periods over 1 s, considering long response periods. These results reflect that the parameter Vs30 does not manage to capture in a good way the behavior of soils with long periods.
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