Local site response analyses based on field measurements compared to vs30 site-condition and geologic and topographic constraints

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Publication Title
Local site response analyses based on field measurements compared to vs30 site-condition and geologic and topographic constraints

Abstract
Earthquake forces can quickly cause vibrations that damage structures, leading to cracks and possible collapse. Buildings designed in accordance with EC8 (Eurocode 8) take into account soil properties based on ground motion amplification data. The use of average shear-wave velocity for the uppermost 30 m soil layers provides the core for soil type classification to determine the appropriate design acceleration response spectrum. On one hand, determining vs30 requires detailed investigations, however, lately intensive research has attempted to correlate vs30 data with slope and geology. On the other hand, previous results have demonstrated that the amplification of acceleration might differ even for the same soil category determined based on vs30. In this paper vs30 is determined from field measurements, also taking into consideration the correlation between slope values and the measured Vs30 profile. In addition to this result, 1-dimensional response analysis is also performed using STRATA software, obtaining the site-specific acceleration spectrum. The study highlights the importance of seismic site characterization and the usefulness of determining the local site effect.
Authors
Orsolya Kegyes-Brassai; G. Kovacs; Tamas Toth; B. Labar; Akos Wolf

Published In

18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)

Theme

B - Geohazards

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