Topographic effects observed at Amatrice hill during the 2016-2017 Central Italy seismic sequence  

作　　者：Gerardo Grelle Laura Bonito Maresca Rosalba Silvia Iacurto Claudia Madiai Paola Revellino Giuseppe Sappa 

机构地区：[1]Department of Civil,Building and Environmental Engineering,Sapienza University of Rome,Italy [2]Department of Sciences and Technologies,University of Sannio,Italy [3]Department of Civil and Environmental Engineering,University of Florence,Italy

出　　处：《Earthquake Engineering and Engineering Vibration》2021年第1期63-78,共16页地震工程与工程振动（英文刊）

摘　　要：The estimate of seismic site effects by experimental approaches is based on different assumptions aimed at simplifying the complex actual site conditions and related uncertainties.However,the reliability of the results can increase if the experimental data is focused on quite strong seismic sequences and the on-site acquisition of a large number of signals is deemed strategic for the assessment of the expected phenomena.Based on these considerations,the ground motion at the Red Zone sector of Amatrice hill,violently struck by the 2016-2017 Central Italy seismic sequence,was analyzed via an observational approach.A large set of weak motions(moment magnitude Mw 2.5-3.9)was analyzed in this study by means of standard(SSR)and horizontal to vertical(HVSR)spectral ratio techniques.The results from the experimental analysis of the site effects by using weak motion and noise signals show a significant amplification at the top of Amatrice hill with a remarkable polarization of the motion and changes in spectral shapes according to the topographic setting of the relief.

关 键 词：topographic effects standard spectra ratio(SSR) horizontal and vertical spectral ratio(HVSR) directional effects 

分 类 号：P315[天文地球—地震学]