Empirical evaluation of the control period TC for intermediate-depth earthquakes: application for Romania

Florin Pavel () and Saman Yaghmaei-Sabegh
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Florin Pavel: Technical University of Civil Engineering Bucharest
Saman Yaghmaei-Sabegh: University of Tabriz

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2023, vol. 118, issue 3, No 31, 2609-2628

Abstract: Abstract This study focuses on the empirical assessment of the control period TC for intermediate-depth earthquakes. A ground motion database of about 700 recordings from 25 intermediate-depth seismic events occurring in the Vrancea seismic zone in Romania as well as in other sources in the world is used in the study. A simple empirical model is proposed for the evaluation of the control period TC. The largest part of the variability of the proposed empirical model can be attributed to the intra-event component. The analysis of the residuals has shown no significant bias due to the different tectonic regimes of the earthquakes in the database. A comparison between the seismic hazard results in terms of TC computed using the proposed empirical model and from spectral accelerations according to the procedure from the proposed Eurocode 8 draft is performed for several case study sites in Romania. The probabilistic seismic hazard assessment shows that the control periods TC computed in this study are much larger than the ones obtained using the approach from the proposed Eurocode 8 draft revision and larger, as well, than the TC values proposed in the current version of the Romanian seismic design code P100-1/2013. The study also shows that for Romania, a solution for the seismic hazard zonation is to perform the analysis of Sα according to the provisions from the proposed Eurocode 8 draft and to evaluate the control period TC using an empirical model.

Keywords: Regression analysis; Analysis of residuals; Seismic hazard; Soil conditions; Design seismic action; Seismic zonation (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s11069-023-06110-x

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