地盤モデルに基づく2地点間の伝達関数と地震観測記録を用いた任意地点における地震動の推定

概要

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In order to apply Empirical Green's Function Method for strong motion prediction at arbitrary points where strong motion records are not available, we propose a new method to estimate ground motion at a site using observed record at nearby site and theoretically evaluated transfer functions between two sites. The transfer function is calculated from hybrid method composed of synthetic wave motions based on 3D-Finite Difference Method and 1D receiver effects that include radiation, propagation and site amplification effects of the P, SV and SH wave fields. The estimated transfer function by hybrid method between arbitrary two points shows good correspondence with that of observed ground motions at same points. The proposed method is verified at a site where strong motion records are available, where the observed records are well simulated compared to the conventional estimation methods such as 3D-F.D.M.
2006-11-30