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Analytical and Experimental Investigation of the Frequency Content of Ground Motions Recorded in Bucharest During Strong Vrancea Earthquakes

  • Iolanda-Gabriela Craifaleanu
  • Elena-Andreea Calarasu
Conference paper

Abstract

With a population of over 2 million inhabitants, Bucharest is considered as one of the world’s 10 most vulnerable cities to earthquakes. Several destructive earthquakes, occurring from the Vrancea seismogenic source, have hit the city in the past. According to previous studies, the particular local near surface geology of the city seems to play an important role in the site amplification phenomena recorded during strong earthquakes. In the paper, the frequency content of ground motions recorded in Bucharest during the strong Vrancea earthquakes of the last four decades is assessed analytically, based on parameters used in literature, and results are mapped and interpreted in correlation with the information obtained by in situ measurements. Conclusions are drawn, with reference to the combined effects of seismic source and of local site conditions in the analyzed area.

Keywords

Frequency content Site effects Predominant period Vrancea earthquakes 

Notes

Acknowledgements

This work was partly supported by the Ministry of National Education under Contract No. 72/2012, “BrIdging the Gap between Seismology and Earthquake Engineering: from the Seismicity of Romania towards a refined implementation of Seismic Action in EN1998-1 in earthquake resistant design of buildings”, in which URBAN-INCERC participates as a partner. The second author would like to acknowledge the support of the staff at the National Centre for Seismic Risk Reduction, the Technical University of Civil Engineering Bucharest and URBAN-INCERC, during the research and training she performed within several seismic risk reduction projects, as well as of other organizations in the field, as the National Institute for Earth Physics, ISPIF and GEOTEC.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Iolanda-Gabriela Craifaleanu
    • 1
    • 2
  • Elena-Andreea Calarasu
    • 2
  1. 1.Department of Reinforced Concrete StructuresTechnical University of Civil Engineering BucharestBucharestRomania
  2. 2.INCERC Bucharest BranchNational Institute for Research and Development in Construction, Urban Planning and Sustainable Spatial Development “URBAN-INCERC”BucharestRomania

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