Publication Date:
2020-11-30
Description:
Taking advantage of a large displacement-release experiment on a twostory
reinforced concrete building located in Bagnoli (Naples, Italy), we performed
free-field measurements using 3D seismometers, accelerometers, and a 100-m-long
vertical array. The ground motion was noticeable: near the building, the acceleration
exceeded 5% g. At each measurement point, it was possible to recognize two source
terms, due to the tested building and to the reaction structure. The two sources generated
different wave trains. High-frequency accelerations propagated as Rayleigh
waves, whereas 1–2 Hz waves carrying most of the displacement propagated only
as body waves. The experiment lends further support to the hypothesis that buildings
are able to modify substantially the free-field ground motion in their proximity: the
peak ground acceleration we observed is the 20% of the ground acceleration required
to produce a displacement on the building equal to the one imposed during the release
test. We recognize, however, the difficulty of a realistic modeling of wave propagation
in the topmost layer of a densely urbanized area.
Description:
Published
Description:
2457–2464
Description:
5T. Sismologia, geofisica e geologia per l'ingegneria sismica
Description:
JCR Journal
Description:
open
Keywords:
Seismic Source
;
04. Solid Earth::04.06. Seismology::04.06.04. Ground motion
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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