Earthquakes and Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Conditional mean spectrum for Bucharest

  • Vacareanu, Radu (Department of Reinforced Concrete Structures, Technical University of Civil Engineering Bucharest) ;
  • Iancovici, Mihail (Department of Structural Mechanics, Technical University of Civil Engineering Bucharest) ;
  • Pavel, Florin (Department of Reinforced Concrete Structures, Technical University of Civil Engineering Bucharest)
  • Received : 2013.12.27
  • Accepted : 2014.03.12
  • Published : 2014.08.29
⟨ Previous Next ⟩

Abstract

The Conditional Mean Spectrum represents a powerful link between the seismic hazard information and the selection of strong ground motion records at a particular site. The scope of the paper is to apply for the city of Bucharest for the first time the method to obtain the Conditional Mean Spectrum (CMS) presented by Baker (2011) and to select, on the basis of the CMS, a suite of strong ground motions for performing elastic and inelastic dynamic analyses of buildings and structures with fundamental periods of vibration in the vicinity of 1.0 s. The major seismic hazard for Bucharest and for most of Southern and Eastern Romania is dominated by the Vrancea subcrustal seismic source. The ground motion prediction equation developed for subduction-type earthquakes and soil conditions by Youngs et al. (1997) is used for the computation of the Uniform Hazard Spectrum (UHS) and the CMS. The disaggregation of seismic hazard is then performed in order to determine the mean causal values of magnitude and source-to-site distance for a particular spectral ordinate (for a spectral period T = 1.0 s in this study). The spectral period of 1.0 s is considered to be representative for the new stock of residential and office reinforced concrete (RC) buildings in Bucharest. The differences between the Uniform Hazard Spectrum (UHS) and the Conditional Mean Spectrum (CMS) are discussed taking into account the scarcity of ground motions recorded in the region of Bucharest and the frequency content characteristics of the recorded data. Moreover, a record selection based on the criteria proposed by Baker and Cornell (2006) and Baker (2011) is performed using a dataset consisting of strong ground motions recorded during seven Vrancea seismic events.

Keywords

References

  1. Atkinson, G. and Boore, D. (2003), "Empirical ground-motion relations for subduction-zone earthquakes and their application to Cascadia and other regions", Bull. Seismol. Soc. Am., 93(4), 1703-1729. https://doi.org/10.1785/0120020156
  2. Baker, J. and Cornell, C.A. (2005), "A vector-valued ground motion intensity measure consisting of spectral acceleration and epsilon", Earthq. Eng. Struct. Dyn., 34(10), 1193-1217. https://doi.org/10.1002/eqe.474
  3. Baker, J. and Cornell, C.A. (2006), "Spectral shape, epsilon and record selection", Earthq. Eng. Struct. Dyn., 35(9), 1077-1095. https://doi.org/10.1002/eqe.571
  4. Baker, J. (2011), "Conditional mean spectrum: tool for ground motion selection", J. Struct. Eng., 137(3), 322-331. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000215
  5. Bazzurro, P. and Cornell, C.A. (1999), "Disaggregation of seismic hazard", Bull. Seismol. Soc. Am., 89(2), 501-520.
  6. Burks, L. and Baker, J. (2012), "Occurrence of negative epsilon in seismic hazard analysis deaggregation, and its impact on target spectra computation", Earthq. Eng. Struct. Dyn., 41(8), 1241-1256. https://doi.org/10.1002/eqe.1183
  7. Delavaud, E., Cotton, F., Akkar, S., Scherbaum, F., Danciu, L., Beauval, C., Drouet, S., Douglas, J., Basili, R., Sandikkaya, A., Segou, M., Faccioli, E. and Theodoulidis, N. (2012), "Toward a ground-motion logic tree for probabilistic seismic hazard aSSEssment in Europe", J. Seismol., 16(3), 451-473. https://doi.org/10.1007/s10950-012-9281-z
  8. Ebrahimian, H., Azarbakht, A., Tabandeh, A. and Golafshani, A. (2012), "The exact and approximate conditional spectra in the multi-seismic-sources regions", Soil Dyn. Earthq. Eng., 39, 61-77. https://doi.org/10.1016/j.soildyn.2012.03.004
  9. Iervolino, I., Chioccarelli, E. and Convertito, V. (2011), "Engineering design earthquakes from mul timodal hazard disaggregation", Soil Dyn. Earthq. Eng., 31(9), 1212-1231. https://doi.org/10.1016/j.soildyn.2011.05.001
  10. Ismail-Zadeh, A.T., Matenco, L., Radulian, M., Cloetingh, S. and Panza, G.F. (2012), "Geodynamics and intermediate-depth seismicity in Vrancea (the south-eastern Carpathians): current state-of-the art", Tectonophysics, 530-531, 50-79. https://doi.org/10.1016/j.tecto.2012.01.016
  11. Katsanos, E., Sextos, A. and Manolis, G. (2010), "Selection of earthquake ground motion records: a state-ofthe- art review from a structural engineering perspective", Soil Dyn. Earthq. Eng., 30(4), 157-169. https://doi.org/10.1016/j.soildyn.2009.10.005
  12. Kramer, S. (1996), Geotechnical Earthquake Engineering, Prentice Hall, Upper Saddle River, NJ, USA.
  13. Lin, P.S. and Lee, C.T. (2008), "Ground-motion attenuation relationships for subduction-zone earthquakes in Northeastern Taiwan", Bull. Seismol. Soc. Am., 98(1), 220-240. https://doi.org/10.1785/0120060002
  14. Lungu, D., Demetriu, S., Radu, C. and Coman, O. (1994), "Uniform hazard response spectra for Vrancea earthquakes in Romania", (J. Duma Ed.), Proceedings of the 10th European Conference on Earthquake Engineering, Balkema, Rotterdam, Netherlands, 365-370.
  15. Lungu, D., Vacareanu, R., Aldea, A. and Arion, C. (2000), Advanced Structural Analysis, Conspress, Bucharest, Romania.
  16. Marmureanu, G., Cioflan, C.O. and Marmureanu, A. (2010), Research Regarding the Local Seismic Hazard (microzonation) of the Bucharest Metropolitan Area, Tehnopress, Iasi, Romania. [In Romanian]
  17. McGuire, R. (1999), "Probabilistic seismic hazard analysis and design earthquakes: closing the loop", Bull. Seismol. Soc. Am., 85(5), 1275-1284.
  18. McGuire, R. (2004), Seismic Hazard and Risk Analysis, Earthquake Engineering Research Institute MNO-10.
  19. Milsom, J. (2005), "The Vrancea seismic zone and its analogue in the Banda arc, Eastern Indonesia", Tectonophysics, 410(1-4), 325-336. https://doi.org/10.1016/j.tecto.2005.06.011
  20. Mocanu, V. (2010), "Mantle flow in the Carpathian bend zone? Integration of GPS and geophysical investigations", Tectonic Crossroads: Evolving Orogens of Eurasia-Africa-Arabia", Geological Society of America International Meeting, Ankara, Turkey.
  21. Musson, R. (1999), "Probabilistic seismic hazard maps for the North Balkan region", Annals of Geophys., 42(6), 1109-1124.
  22. P100-1/2006 (2006), Code for Seismic Design - Part I - Design Prescriptions for Buildings, Ministry of Transports, Constructions and Tourism, Bucharest, Romania.
  23. P100-1/2013 (2013), Code for Seismic Design - Part I - Design Prescriptions for Buildings, Ministry of Regional Development and Public Administration, Bucahrest, Romania.
  24. Radulian, M., Mandrescu, N., Popescu, E., Utale, A. and Panza, G. (2000), "Characterization of Romanian seismic zones", Pure Appl. Geophys., 157, 57-77. https://doi.org/10.1007/PL00001100
  25. Romplus seismic catalogue: http://www.infp.ro/catalog-seismic
  26. Scherbaum, F., Cotton, F. and Smit, F. (2004), "On the use of response spectral-reference data for the selection and ranking of ground-motion models for seismic-hazard analysis in regions of moderate seismicity: the case of rock motion", Bull. Seismol. Soc. Am., 94(6), 2164-2185. https://doi.org/10.1785/0120030147
  27. Sokolov, V., Bonjer, K.P., Wenzel, F., Grecu, B. and Radulian, M. (2008), "Ground-motion prediction equations for the intermediate depth Vrancea (Romania) earthquakes", Bull. Earthq. Eng., 6(3), 367-388. https://doi.org/10.1007/s10518-008-9065-6
  28. Sokolov, V., Wenzel, F. and Mohindra, R. (2009), "Probabilistic seismic hazard a SSEssment for Romania and sensitivity analysis: A case of joint consideration of intermediate-depth (Vrancea) and shallow crustal seismicity", Soil Dyn. Earthq.Eng., 29(2), 364-381. https://doi.org/10.1016/j.soildyn.2008.04.004
  29. Sperner, B., Lorenz, F., Bonjer, K.P., Hettel, S., Muller, B. and Wenzel, F. (2001), "Slab break-off -abrupt cut or gradual detachment? New insights from the Vrancea region (SE Carpathians, Romania)", Terra Nova, 13, 172-179. https://doi.org/10.1046/j.1365-3121.2001.00335.x
  30. Stamatovska, S. and Petrovski, D. (1996), "Empirical attenuation acceleration laws for Vrancea intermediate earthquakes", Proceedings of the 11th World Conference on Earthquake Engineering, Acapulco, Mexico, Paper No. 146.
  31. Vacareanu, R., Lungu, D., Marmureanu, G., Cioflan, C., Aldea, A., Arion, C., Neagu, C., Demetriu, S. and Pavel, F. (2013a), "Statistics of seismicity for Vrancea subcrustal source", Proceedings of the International Conference on Earthquake Engineering SE-50 EEE, Skopje, Macedonia, Paper No. 138.
  32. Vacareanu, R., Pavel, F. and Aldea, A. (2013b), "On the selection of GMPEs for Vrancea subcrustal seismic source", Bull. Earthq. Eng., 11(6), 1867-1884. https://doi.org/10.1007/s10518-013-9515-7
  33. Wu, C.F. (1986), "Jackknife, bootstrap, and other resampling methods in regression analysis", Ann. Math. Statist., 14(4), 1261-1295. https://doi.org/10.1214/aos/1176350142
  34. Youngs, R.R., Chiou, S.J., Silva, W.J. and Humphrey, J.R. (1997), "Strong ground motion attenuation relationships for subduction zone earthquakes", Seism. Res. Lett., 68(1), 58-73. https://doi.org/10.1785/gssrl.68.1.58
  35. Zhao, J.X., Zhang, J., Asano, A., Ohno, Y., Oouchi, T., Takahashi, T., Ogawa, H., Irikura, K., Thio, H.K., Somerville, P.G., Fukushima, Y. and Fukushima, Y. (2006), "Attenuation relations of strong ground motion in Japan using site classification based on predominant period", Bull. Seismol. Soc. Am., 96(3), 898-913. https://doi.org/10.1785/0120050122

Cited by

  1. Modification of ground motions using wavelet transform and VPS algorithm vol.12, pp.4, 2017, https://doi.org/10.12989/eas.2017.12.4.389