Referans Bilgileri

An empirical attenuation relationship for Northwestern Turkey ground motion using a random effects approach

Cem Özbey, Ali Sari, Lance Manuel, Mustafa Erdik, Yasin Fahjan

Soil Dynamics and Earthquake Engineering

Cilt: 24, Sayı: 2, 115-125, 2004/02

Using a random effects model that takes into consideration the correlation of data recorded by a single seismic event, a database consisting of 195 recordings from 17 recent events is employed to develop empirical attenuation relationships for the geometric mean of horizontal peak ground acceleration and 5-percent damped spectral acceleration (Sa). The recordings employed are obtained from strong motion stations operating in Northwestern Turkey and resulted from events that include the Kocaeli (Mw=7.4) and the Düzce (Mw=7.1) earthquakes and their aftershocks as well as other events. By studying differences in standard errors, the random effects model is compared with a fixed effects model that does not account for distinctions between intra- and inter-event variability. Effects of local site conditions are included in the empirical relationships developed. The dependence on frequency of the various model parameters is also studied. Frequency-dependent attenuation coefficients for the proposed random effects models developed are summarized in tables to facilitate their use.

Anahtar Kelimeler: Attenuation; Northwestern Turkey; Random effects; Ground motion

Elsevier Ltd.

DOI: 10.1016/j.soildyn.2003.10.005

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