A study of residuals for strong ground motions in Adapazari basin,NW Turkey,by ground motion prediction equations (GMPEs) |
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| Authors: | Ergin Uluta? Özkan Coruk Ahmet Karaka? |
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| Institution: | (1) Department of Civil Engineering, Istanbul Technical University, Pembegul sok. Pelin apt. No: 20 D:5 Suadiye, Istanbul, 34740, Turkey;(2) Department of Civil Engineering, K.U. Leuven, Kasteelpark Arenberg 40, 3001 Leuven, Belgium |
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| Abstract: | The city of Adapazarı — located in the Marmara Region of northwest Turkey — is situated on a deep sedimentary basin and was
the city most heavily damaged by the strong ground motion of the 17 August 1999 Kocaeli earthquake (moment magnitude Mw = 7.4). This study determines site amplifications of the attenuation relationships for shallow earthquakes in the Adapazarı
basin by using the previous ground motion prediction equations (GMPEs) and the traditional spectral ratio method. The site
amplifications are determined empirically by averaging the residuals between the observed and predicted peak ground acceleration
(PGA) and spectral acceleration (SA) values for various periods. Residuals are significantly correlated with the known characteristics
of geological units. A new attenuation model has also been developed for 5% damped spectral acceleration to determine the
dependence of strong ground motions on frequency. |
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