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Authors: Pagliaroli, Alessandro* 
Pergalani, Floriana* 
Ciancimino, Andrea* 
Chiaradonna, Anna* 
Compagnoni, Massimo* 
de Silva, Filomena* 
Foti, S.* 
Giallini, Silvia* 
Lanzo, G.* 
Lombardi, F.* 
Luzi, Lucia* 
Macerola, Luca* 
Nocentini, Massimiliano* 
Pizzi, A.* 
Tallini, Marco* 
Teramo, C.* 
Title: Site response analyses for complex geological and morphological conditions: relevant case-histories from 3rd level seismic microzonation in Central Italy
Journal: Bulletin of Earthquake Engineering 
Series/Report no.: /18 (2020)
Publisher: Springer
Issue Date: 2020
DOI: 10.1007/s10518-019-00610-7
Keywords: Seismic microzonation
Ampli cation factors
Response spectra
Numerical analyses
Subject Classificationsite response
Abstract: The paper presents the results of 5 case studies on complex site e ects selected within the project for the level 3 seismic microzonation of several municipalities of Central Italy dam- aged by the 2016 seismic sequence. The case studies are characterized by di erent geo- logical and morphological con gurations: Monte San Martino is located along a hill slope, Montedinove and Arquata del Tronto villages are located at ridge top whereas Capitignano and Norcia lie in correspondence of sediment- lled valleys. Peculiarities of the sites are constituted by the presence of weathered/jointed rock mass, fault zone, shear wave veloc- ity inversion, complex surface and buried morphologies. These factors make the de ni- tion of the subsoil model and the evaluation of the local response particularly complex and di cult to ascertain. For each site, after the discussion of the subsoil model, the results of site response numerical analyses are presented in terms of ampli cation factors and acceleration response spectra in selected points. The physical phenomena governing the site response have also been investigated at each site by comparing 1D and 2D numerical analyses. Implications are deduced for seismic microzonation studies in similar geological and morphological conditions.
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