The microzonation of Nocera Umbra – Seismic characterization of shallow soils at Nocera Umbra, for seismic response analysis

 

Seismo-stratigraphic models of shear wave velocities have been obtained at representative geological sites of Nocera Umbra, that is: the historical centre for scaglia formations; the cemetery, for eluvial and alluvial soils; Bagni, for travertine deposit; Isola and Le Molina, for debris fan material, alluvial soils and silty and marly formation. The signals, recorded along seismic retraction spreadings, have been analysed by FTAN and Hedgehog methods. A very good agreement has been found with down-hole measurements in nearby drillings.

 

Seismo-stratigraphic models of shear wave velocities have been obtained at representative geological sites of Nocera Umbra, that is: the historical centre for scaglia formations; the cemetery, for eluvial and alluvial soils; Bagni, for travertine deposit; Isola and Le Molina, for debris fan material, alluvial soils and silty and marly formation. The signals, recorded along seismic retraction spreadings, have been analysed by FTAN and Hedgehog methods. A very good agreement has been found with down-hole measurements in nearby drillings.

Moreover, the October 5 and 14, 1997 earthquakes, recorded at two ENEL-SSN accelerometric stations, Nocera set on alluvial deposits investigated in this paper, and Biscontini on marly calcareous rock, have been studied. It turns out that the observed response spectra have a very good match with those computed with standard lD approach (SHAKE program), by using the lowest velocity profile among the Hedgehog solutions.


  Seismo-s …


AUTORI: Nunziata C., Chimera G., Natale M., Panza G.F.
RIG ANNO:2000 NUMERO:4
Numero di pagine: 31


Allegato: https://associazionegeotecnica.it/wp-content/uploads/2010/03/RIG_2001_4_31.pdf
Allegato:
Articolo completo: https://associazionegeotecnica.it/wp-content/uploads/2010/03/RIG_2001_4_31.pdf