| 講演要旨(和文) | | (その１）で構築した三重県伊賀上野地域の3次元地盤構造モデルを用いて，1次元波動理論により鉛直S波入射に対する卓越周波数と地震動増幅率の空間分布特性を検討する．さらに，既往の地盤モデルとの比較により，今回作成したモデルの有する特徴（特に台地・段丘と沖積低地との増幅率の差異）を確認する．最後に，南海トラフ沿いの地震に対する露頭岩盤での計算波形を入力波とする地震応答解析を行い，最大速度，計測震度の空間分布特性について考察し，本研究で構築した地盤モデルの有用性を示す． |
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| | 講演要旨(英文) | | Using the 3D subsurface structural model constructed in Part 1, we conducted the seismic response analysis and evaluated the spatial distribution characteristics of the 1st predominant frequency, averaged seismic amplification for some frequency ranges, the average shear-wave velocity in the upper 30 m (AVS30), and the maximum of peak ground velocity. Comparing the spatial distribution of the AVS30 in the present model and that derived from previously published model, we discussed that two different models resolve the different locations for large seismic amplifications. We concluded that the present model, which is based on the microtremor measurement and surface wave exploration for the targeted area, is useful for more detailed prediction of seismic hazards. |
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