特性曲線法を用いた2000年鳥取県西部地震の地盤震動シミュレーション

概要

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In completing into seismic design for high-rise buildings constructed on soft soil layer, it is necessary to consider soil non-linearity. It must be discussed how to predict bedrock motions based on surface motions and whether surface motions can reappear by nonlinear response analyses subjected to predicted bedrock motions. This study investigates applicability of characteristic method to base motion analyses and direct integration method to nonlinear response analyses. The simulation analyses are carried out using the strong ground motions recorded at the KiK-net stations near the seismic fault of the 2000 Tottori-ken Seibu earthquake (M_J7.3). Observed motions reveals that the soil non-linearity plays an important role in site amplification between the two vertical array points during the main shock. The base motions and surface motions calculated by proposed methods show good correlation to observed ground motions.
2002-08-30