Publication Date:
2019-11-04
Description:
The seismic response of the geologic structure beneath the Colosseum is investigated using a two-dimensional
modeling for a vertically incident plane SH wave. Computations indicate that the southern part of the Colosseum
may be exposed to a seismic ground motion with significantly larger amplitudes, differential motion and
longer duration than the northern part. because the southern part of the Colosseum is underlain by a sedimentfilled
valley created by sedimentary filling of the former tributary of the River Tiber. A 2-D resonance may
develop in the valley. Unlike the previous theoretical studies on 2-D resonance in sediment-filled valleys, an
effect of heterogeneous valley surroundings on the resonance is partly investigated. A very small sensitivity of
the maximum spectral amplifications connected with the fundamental and first higher modes to the presence of
a horizontal surface layer (with an intermediate velocity) in the valley surroundings is observed in the studied
models.
Description:
JCR Journal
Description:
open
Keywords:
Roman Colosseum
;
seismic waves
;
seismic response
;
site effect
;
2-D resonance
;
finite-difference method
;
04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Format:
6807852 bytes
Format:
application/pdf
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