Site Effect Evaluation In Sellano (Italy) By
1-D And 2-D Numerical Analyses
Author(s)
P. Capilleri, G. Lanzo, M. Maugeri & A. Pagliaroli
Abstract
The 1997–1998 Umbria-Marche seismic sequence induced severe damage to the
historical centre of Sellano (Perugia, Italy). During the long aftershock sequence
two temporary accelerometric stations, about 300m apart, provided several
ground motion records. These data allowed us to investigate the amplification of
surface motion which can essentially be ascribed to local seismic effects. A site
response study of the historical centre of the village was carried out by means of
1-D and 2-D numerical analyses to clarify the role played by the stratigraphic
and topographic effects. The applicability of 1-D and 2-D models was examined
by comparing the recorded and calculated acceleration response spectra. 1-D
response analyses seem to indicate a significant stratigraphic effect on the
ground response. Conversely, 2-D response analyses have shown only moderate
amplification effects due to surface topography, which somewhat improved the
predictions of site response spectra.
Keywords: 1997 Umbria-Marche earthquake, stratigraphic effects, topographic
effects, 1-D and 2-D numerical analyses.
1 Introduction
It is well recognised that local seismic effects can exert a significant influence on
the distribution of damages during earthquakes. Traditionally, these effects have
been studied by means of simple one-dimensional (1-D) models of seismic wave
propagation, which take into account only the influence of the stratigraphic
profile and soil/bedrock properties on the seismic response. Conversely, local
Keywords
1997 Umbria-Marche earthquake, stratigraphic effects, topographic
effects, 1-D and 2-D numerical analyses.
Related Book
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