Abstract
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.
Original language | English |
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Pages (from-to) | 115-125 |
Number of pages | 11 |
Journal | Soil Dynamics and Earthquake Engineering |
Volume | 24 |
Issue number | 2 |
DOIs | |
Publication status | Published - Feb 2004 |
Externally published | Yes |
Keywords
- Attenuation
- Ground motion
- Northwestern Turkey
- Random effects