ANALYSIS OF INFLUENCE OF FACTORS ON ATTENUATION RELATION OF NEAR SOURCE GROUND MOTION PEAK ACCELERATION

The attenuation model for magnitude and distance saturations of near source peak ground acceleration is discussed by regression analysis of data of strong ground motion records in the paper. The result shows that the effect of magnitude and distance saturations to be characterized by R0(M) depends not only on magnitude but also on the behaviors of the source and its spectra. The influence of factors on attenuation relation of near source ground motion peak acceleration are also discussed in accordance with the attenuation regression models, condition of strong motion record site, mechanism of earthquake, and so on.