COMPARISONS OF ALTERNATIVE SEISMIC INTENSITY PARAMETERS FOR SELECTED SETS OF REAL AND SIMULATED GROUND MOTION RECORDS

Karım Zadeh Naghshıneh S., Kadas K., Askan Gündoğan A., Yakut A.

36th General Assembly of the European Seismological Commission (ESC 2018), Valletta, Malta, 2 - 07 Eylül 2018, ss.650

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Valletta
  • Basıldığı Ülke: Malta
  • Sayfa Sayıları: ss.650
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

In areas where inadequate number of regional real ground motion records are available, seismic vulnerability of structural systems can be assessed alternatively using simulated records generated for potential scenario events at the region of interest. However, the main question of interest herein is the accuracy of these simulated records. Thus, this study aims to obtain and compare alternative seismic ground motion intensity measures for the selected sets of real and simulated ground motion records. For this purpose, simulated records corresponding to two alternative study areas; Erzincan and Duzce which are located in the Eastern and Western parts of Turkey, are utilized. For ground motion simulations at the selected study areas, the stochastic finite-fault technique is used. On the other hand, real records are chosen from the available global databases corresponding to previous earthquakes with the intention of obtaining a ground motion dataset regionally compatible for each study area. In the selection process, parameters such as the fault mechanism, earthquake magnitude, soil condition, source to site distance are taken into account. After formation of the real and simulated record sets for the selected regions, Peak Ground Acceleration (PGA), Peak Ground Velocity (PGV), Housner Intensity (HI), Cumulative Absolute Velocity (CAV), Velocity Spectrum Intensity (VSI), Arias Intensity (Ia), a modified version of Acceleration Spectrum Intensity (ASI*), and Significant Duration (td) are calculated for each record as selected ground motion intensity measures. To assess the degree of compatibility between the intensity parameters of the real and simulated records, statistical tests are performed and comparisons are graphically displayed as well. Results reveal that in most cases there is consistency among the ground motion intensities calculated for the selected real and simulated record datasets.