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Earthquake Perception Data Highlight Natural Frequency Details of Italian Buildings
  • Patrizia Tosi,
  • Valerio De Rubeis,
  • Paola Sbarra
Patrizia Tosi
Istituto Nazionale di Geofisica e Vulcanologia

Corresponding Author:[email protected]

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Valerio De Rubeis
Istituto Nazionale di Geofisica e Vulcanologia
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Paola Sbarra
Istituto Nazionale di Geofisica e Vulcanologia
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Abstract

We analyzed more than 286,000 felt/not-felt data to study the effect of building height on earthquake perception. We investigated the boundary distance of perception as a function of magnitude, and we found that as the height of the building increased, observers located on higher floors perceived medium to high magnitude earthquakes progressively better than smaller ones. Comparison of the perception boundary trend with seismic response spectra allowed us to estimate the frequency of vibration perceived by observers located at each floor/building-height case. The results, in agreement with instrumental observation, show that the value of the fundamental period increases with building height for the top floor. In addition, we observed that the height of the building also influences the vibration frequencies of basement floors and that higher vibration modes become more evident for buildings with more than six stories.