Abstract
In this chapter, the soil conditions in the Bucharest area are evaluated using several approaches based on both observed and simulated ground motion recordings. The analysis of the recorded ground motions shows the fact that significant long-period spectral ordinates are encountered for large magnitude Vrancea intermediate-depth seismic events. A soil class C according to EN 1998-1/2004 can be assigned for Bucharest based on the shear-wave velocities of the existing boreholes in this area. However, the much deeper Quaternary sediments from the Bucharest area can generate significant long-period spectral ordinates largely exceeding the ones for a typical soil class C site. The nonlinear ground response analysis performed for INCERC site in the eastern part of Bucharest revealed ground motions with a frequency content similar to the one of the ground motion recorded during the Vrancea 1977 earthquake. Besides the peak in amplitude corresponding to a spectral period of around 1.5 s, some additional analyses have shown that another peak at around 5 s can be inferred from the available data.
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Pavel, F., Popa, V., Vacareanu, R. (2018). Evaluation of Soil Conditions in 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_2
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DOI: https://doi.org/10.1007/978-3-319-73402-6_2
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