Evaluating the applicability of the microzonation simplified approach (national abacuses) in the plain of the Friuli Venezia Giulia Region (Italy)
| Autor: | Pazzi, V., Beltrame, C., Taverna, P., Peressi, G., Costa, G. |
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| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| DOI: | 10.57757/iugg23-3418 |
| Popis: | The seismic shaking of an area is strongly affected by the local geological. The so-called local site effects must be considered for the estimation of seismic effects on structures and urban planning. Thus, the Seismic Microzonation (SM), is the process aimed at identifying and mapping, usually at urban/municipality scale and in terms of ground shaking parameters and susceptibility to ground instabilities, the subsoil local response in a given area. The Guidelines for Seismic Microzoning (SM) have been in used in Italy since 2008. According to them a modular approach that identify three levels of details is proposed. The second level aims at quantify the seismic amplification (Amplification Factor, AF) of the different homogenous micro-zones in the seismic perspective (identified in the SM first level) and eventually re-shape these areas. To do that a simplified approach (tables of correspondences called seismic abacuses and available for the whole national territory) is proposed for areas that can be schematised thanks to a 1D subsoil model (e.g., alluvial plain). In this work the results of the comparison between the AF values retrieved from national abacuses applied in the Friuli Venezia Giulia (Italy) plain municipalities and those from numerical simulations are presented. In general, AFs from abacus are lower excepted for the area of Pordenone municipality or some isolated sites. Moreover, the response spectra derived applying the AF values (both from abacuses and numerical simulations) have been compared to those proposed by the Italian Building regulation. These last in most cases underestimate the soil effects. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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