Abstract
A global dataset of more than 3,000 ground motion records from 536 sites from Greece, Italy, Turkey, USA and Japan is used to propose elastic acceleration response spectra and soil amplification factors for a new site classification system, which uses parameters such as the thickness of soil deposits, the average shear wave velocity to the seismic bedrock and the fundamental period of the site. The dataset is also used to derive soil amplification factors for the soil classes of Eurocode 8 (EC8). Uncertainties in the estimation of soil amplification factors are captured using a logic-tree approach, which allows the use of alternative models and methods in an effective way. The results indicate that estimated soil factors for EC8 class C are significantly higher than the ones proposed in the provisions. The performance of the proposed classification system is compared to that of EC8 classification system in terms of an inter-category error, which represents the average dispersion of data within all categories of a given classification scheme and the results indicate some improvement. Error terms for the new classification system are lower than the error terms for EC8 classification system at all periods.
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The work presented herein was performed in the framework of the EU collaborative project SHARE (FP7, Reference code 226967, http://www.share-eu.org/).
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Anastasiadis, A., Riga, E. (2014). Site Classification and Spectral Amplification for Seismic Code Provisions. In: Maugeri, M., Soccodato, C. (eds) Earthquake Geotechnical Engineering Design. Geotechnical, Geological and Earthquake Engineering, vol 28. Springer, Cham. https://doi.org/10.1007/978-3-319-03182-8_2
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