Evaluation of a Fast Proxy of Vs30 (Vs30m)

The most frequent parameter used to quantify seismic site response in ground motion models is time-averaged shear wave velocity in the top 30 m of a site (Vs30), used by many engineering design codes and most recently by published empirical-scaling equations to estimate the amplitudes of strong ground motion. The current study explores the potential comparison of the results from the predictive equations and formula recommends by the international building code. In order to avoid forward modeling and inverse modeling, 53 synthetic and real data models with distinct types of Vs profile were used, to determine the theoretical dispersion curves. In the prediction equation, V R 36 and V R 40 were employed to estimate Vs30. Furthermore, the use of V R 40, based on the 53 different models, shows a good agreement with Vs30. The correlation is significantly influenced by the thickness of the first layer. The findings calculated by the correlation are not in the acceptable zone for layer thicknesses of 10 < H < 20 m and thin layers at shallow depths with lower shear wave velocity.