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Bulletin of Earthquake Engineering

, Volume 9, Issue 1, pp 181–198 | Cite as

Microzonation study in the Paganica-San Gregorio area affected by the April 6, 2009 L’Aquila earthquake (central Italy) and implications for the reconstruction

  • M. Compagnoni
  • F. PergalaniEmail author
  • P. Boncio
Original Research Paper

Abstract

The earthquake of April 6th, 2009 in the L’Aquila area is one of the largest seismic events of the last years in Italy. The event, that caused significant damage in a large area of the Abruzzo region (cental Italy) and site amplification phenomena which were recorded even at large distances from the epicentre. After the emergency period, a detailed study of the surface effects was necessary for the post-earthquake reconstruction, but in a way it should be carried out rapidly enough to give instructions to urban planners, codes to public administrators and information to engineers. A team of surveyors were trained to collect field information such as geologic and geomorphologic features and geotechnical or geophysical information. The seismic inputs, for the numerical analyses, were provided, and the collected information were analyzed with the aid of dynamic codes to calculate the possible local site effects. The results are presented as acceleration response spectra, amplification coefficients (FA, FV and FH) and microzonation maps, aimed to urban planning and project design. In particular the more dangerous areas, affected by the higher amplification effects, were identified. Finally a comparison between the results obtained by the numerical analyses and the results derived from an experimental field analysis, measuring both earthquake weak motion and ambient noise, were performed. In this paper we present the results for one of the most severely damaged area (up to IX-X MCS), the Paganica–Tempera–Onna-San Gregorio area, located 6 to 10 km east of the April 6th main shock.

Keywords

Seismic microzonation Amplification factors Earthquake spectra Urban planning Project design 

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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.Politecnico di Milano—Dipartimento di Ingegneria StrutturaleMilanoItaly
  2. 2.Università “G. D’Annunzio” di Chieti-Pescara—Dipartimento di ScienzeChietiItaly

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