Abstract
It is difficult to evaluate site amplification factor analytically because site amplification factor is affected by several factors such as three dimensional deep subsurface profile. Therefore, site amplification factors have been evaluated by spectral inversion using strong motion records and those at sites without strong motion observation records have not been evaluated precisely.
In this study, evaluation method of site amplification factors at dense strong motion observation area was discussed. Site amplification factors for the low frequency range were evaluated by using both three dimensional finite difference analysis results and empirical site amplification factors. On the other hand, site amplification factors for the high frequency range were evaluated by the mean amplification factors considering geomorphologic condition. Applicability of the proposed method was discussed.
