Comparison of Real and Simulated Records Through Selected Seismic Intensity Measures

Recent studies have shown that simulated ground motions could be utilized to determine the seismic vulnerability of structures where there are limited number of real ground motion records compatible with seismological characteristics of the area of interest. Among various simulation techniques, stochastic finite-fault methodology is believed to practically simulate realistic broadband records including the frequencies which affect the built environment. This study aims to compare the main characteristics of stochastically `simulated' records in terms of major intensity measures along with corresponding `real' records which are consistent with the probable hazard and seismotectonics of the areas studied. The intensity measures considered include Peak Ground Acceleration (PGA), Peak Ground Velocity (PGV), a modified version of Acceleration Spectrum Intensity for consideration of period range of 0.1-2.5s (ASI), Housner Intensity (HI), Velocity Spectrum Intensity (VSI), Cumulative Absolute Velocity (CAV), Arias Intensity (Ia), Significant Duration (td). `Simulated' records generated for two different regions in Turkey (Erzincan and Duzce) along the North Anatolian Fault Zone (NAFZ) are used for comparisons against the corresponding `real' records. Comparisons of seismic intensity measures based on real and simulated data are made both visually and statistically