Site dominant frequencies in Lima, Peru, by h/v spectral ratio of seismic records

نویسندگان

چکیده

Strong motion records are important for improving seismic design, damage assessment and analysis of earthquake effects. Despite the relevance having strong networks, their implementation in Peru has been performed very recent years. For instance, only five stations Lima recorded 2007 Mw 7.9 Pisco earthquake, whereas 55 2021 6.0 Mala earthquake. The current number instrumentations city provides an opportunity to improve soil characterization. This study aims determine dominant frequency (fd) located Metropolitan Lima. procedure we adopted, first considered collecting, arbitrary station, all available events from 2011-2021, including Then, pseudo spectral acceleration, using 5% damping, each component were computed, horizontal-to-vertical (H/V) ratios calculated. Finally, average H/V ratio was used adequately characterize values fd . In total, evaluated 51 throughout city. Values lower than 1 Hz observed coastal areas which underlying consist clayey/sandy deposits regions with impedance contrast deeper part substructure. These increment towards center coinciding surficial gravel deposits.

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ژورنال

عنوان ژورنال: Tecnia

سال: 2022

ISSN: ['2309-0413', '0375-7765']

DOI: https://doi.org/10.21754/tecnia.v32i2.1421