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Site-Dependent Ground-motion Data Recorded by German Taskforce in Turkey
Abstract Within the western segment of the Northanatolian fault zone two strong damaging earthquakes occurred on August 17 (Ms 7.8) and November 12, 1999 (Ms 7.4). Immediately after both earthquakes seismic stations were temporarily installed within the disaster-struck area. The recording stations provided a unique and comprehensive data base of near-field aftershocks, establishing the basis for elaborating subsoil-dependent attenuation laws for peak ground acceleration as well as spectral accelerations.In addition to the aftershock records of the strong motion stations of German TaskForce for Earthquakes 145 triaxial acceleration records of main- and aftershocks (rock 6, stiff 36, soft 103) from the 1999 Turkey earthquakes provided by the Kandilli Observatory and Earthquake Research Institute (KOERI) and the General Directorate of Disaster Affairs (AFET) could be implied. Attenuation functions were elaborated for different data sets considering the impact of data composition, lower magnitude bound, source depth and subsoil conditions. Predicted peak ground accelerations (PGA) and horizontal spectral accelerations are remarkably lower than those from attenuation functions mainly derived from European strong motion records.The different data sets lead to similar spectra. For shorter and longer periods data set of German TaskForce (being dominated by near-field records of lower magnitude) is slightly underestimating the results. Nevertheless, the results can be applied for a realistic and site-dependent prediction of design spectra and probabilistic seismic hazard assessment.
Site-Dependent Ground-motion Data Recorded by German Taskforce in Turkey
Abstract Within the western segment of the Northanatolian fault zone two strong damaging earthquakes occurred on August 17 (Ms 7.8) and November 12, 1999 (Ms 7.4). Immediately after both earthquakes seismic stations were temporarily installed within the disaster-struck area. The recording stations provided a unique and comprehensive data base of near-field aftershocks, establishing the basis for elaborating subsoil-dependent attenuation laws for peak ground acceleration as well as spectral accelerations.In addition to the aftershock records of the strong motion stations of German TaskForce for Earthquakes 145 triaxial acceleration records of main- and aftershocks (rock 6, stiff 36, soft 103) from the 1999 Turkey earthquakes provided by the Kandilli Observatory and Earthquake Research Institute (KOERI) and the General Directorate of Disaster Affairs (AFET) could be implied. Attenuation functions were elaborated for different data sets considering the impact of data composition, lower magnitude bound, source depth and subsoil conditions. Predicted peak ground accelerations (PGA) and horizontal spectral accelerations are remarkably lower than those from attenuation functions mainly derived from European strong motion records.The different data sets lead to similar spectra. For shorter and longer periods data set of German TaskForce (being dominated by near-field records of lower magnitude) is slightly underestimating the results. Nevertheless, the results can be applied for a realistic and site-dependent prediction of design spectra and probabilistic seismic hazard assessment.
Site-Dependent Ground-motion Data Recorded by German Taskforce in Turkey
Schwarz, Jochen (author) / Ende, Clemens (author) / Lang, Dominik H. (author)
2005-01-01
17 pages
Article/Chapter (Book)
Electronic Resource
English
Strong motion data , peak ground acceleration , spectral acceleration , aftershock data , attenuation functions , experimental site classification Engineering , Building Construction , Geotechnical Engineering & Applied Earth Sciences , Geophysics/Geodesy , Statistics for Engineering, Physics, Computer Science, Chemistry and Earth Sciences , Structural Mechanics , Civil Engineering
Site-Dependent Ground-motion Data Recorded by German Taskforce in Turkey
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