Abstract
In this section, a ground motion model is derived specifically for the Bucharest area using a dataset consisting of both recorded and simulated ground motions from Vrancea intermediate-depth earthquakes. The proposed ground motion model is able to capture the significant long-period spectral ordinates generated by the large magnitude Vrancea intermediate-depth earthquakes occurring at short source-to-site distances. In addition, the spectral accelerations derived from the proposed model have frequency contents similar to the recorded ground motions. The probabilistic seismic hazard assessment performed using the previously mentioned ground motion model shows a plateau of constant spectral accelerations up to around 2.0 s, while the corresponding spectral displacements can reach up to 100 cm for periods of 4.0 s. The analyses also reveal that only the larger magnitude earthquakes occurring at short source-to-site distances can generate spectral ordinates exceeding the ones proposed by the current Romanian seismic design code and this situation is valid mainly for long-period structures.
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References
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Pavel, F., Popa, V., Vacareanu, R. (2018). Seismic Hazard Assessment for Bucharest. In: Impact of Long-Period Ground Motions on Structural Design: A Case Study for Bucharest, Romania. SpringerBriefs in Geotechnical and Earthquake Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-73402-6_4
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DOI: https://doi.org/10.1007/978-3-319-73402-6_4
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