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Authors: Mozco, P.*
Rovelli, A.*
Labak, P.*
Malagnini, L.*
Title: Seismic response of the geologic structure underlying the Roman Colosseum and a 2-D resonance of a sediment valley
Issue Date: Nov-1995
Series/Report no.: 38/5_6
Keywords: Roman Colosseum
seismic waves
seismic response
site effect
2-D resonance
finite-difference method
Abstract: 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.
Appears in Collections:Manuscripts
04.06.99. General or miscellaneous
Annals of Geophysics
Papers Published / Papers in press

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