Semi-empirical estimation of the Zagreb ML 5.5 earthquake (2020) ground motion amplification by 1D equivalent linear site response analysis
نویسندگان
چکیده
The 22 March 2020 Zagreb ML 5.5 earthquake ground shaking resulted in damage to buildings and infrastructure. most affected were older cultural heritage (built before 1963) the old city centre with significant extent epicentral zone (southeastern foothills of Medvednica Mt.). This study presents site response analysis on realistic profiles from epicentre towards accelerometric stations QUHS QARH comparison strong motion data recorded during earthquake. Semi-empirical estimation amplification (i.e., peak acceleration at surface) showed that modelled values are comparable. Moreover, we present 2D model surface (PGAsurf ) variation for superimposed profile two stations. Ground scenario PGAsurf is larger by a factor 2 than bedrock value (approx. 0.35 g 0.20 12 km distant station). contribution better understanding effects significance local extent, something combined high economic consequences. Therefore, it important site-specific simulation seismic microzonation continues installation an array. very retrofitting resilience low, mid- high-rise particular care historical as well further urban planning.
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ژورنال
عنوان ژورنال: Geofizika
سال: 2022
ISSN: ['0352-3659', '1846-6346']
DOI: https://doi.org/10.15233/gfz.2021.38.9