Analysis of ground motion along a topographic relief: The cerreto di spoleto case-history (Central Italy)

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Abstract

With the aim of evaluating the seismic hazard and vulnerability of villages with valuable historical monuments in Central Italy, since the late 80's ENEA operated an accelerometric network at the Cerreto di Spoleto village in the area of Central Apennines. The area is characterized by high level instrumental seismicity and seismic hazard. The accelerometric network, consisting of one station located at a rock site close to the hill base and of two accelerometers located inside a building at the relief top, recorded the Umbria-Marche aftershocks of 1997 as well as more recent earthquake sequences. In 2001 a temporary seismometric network was deployed at Cerreto di Spoleto village in order to better characterize the ground motion spatial variability along the ridge. The accelerometric network, consisting of one station located at a rock site close to the hill base and of two accelerometers located inside a building at the relief top, recorded the Umbria-Marche aftershocks of 1997 as well as more recent earthquake sequences. Analysis of the accelerometric records pointed out broadband seismic amplification above 1 Hz at the relief top. In 2001 a temporary seismometric network was deployed at Cerreto di Spoleto village in order to better characterize the ground motion spatial variability along the ridge. The seismic station were deployed at the ridge base and along the crest. To this aim we analyzed waveform in the frequency domain through the Horizontal-to-vertical spectral ratio method. Except for the trapped waves effect, the results showed no clear evidence of ground motion amplification for the stations located on the crest. This evidence suggests that the seismic amplification observed on the accelerometric records is not related to topographic amplification.
Original languageEnglish
Publication statusPublished - 2015
Externally publishedYes
Event5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015 - Hersonissos, Crete, Greece
Duration: 1 Jan 2015 → …

Conference

Conference5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015
CountryGreece
CityHersonissos, Crete
Period1/1/15 → …

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All Science Journal Classification (ASJC) codes

  • Computers in Earth Sciences
  • Computational Mathematics
  • Geotechnical Engineering and Engineering Geology

Cite this

Rinaldis, D., Hailemikael, S., Paciello, A., & Martini, G. (2015). Analysis of ground motion along a topographic relief: The cerreto di spoleto case-history (Central Italy). Paper presented at 5th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2015, Hersonissos, Crete, Greece.