| 講演要旨(和文) | | 防災科研では，関東地域を対象として，周期・増幅特性を考慮した浅部・深部統合地盤構造モデルの作成を行ってきている(Senna et al.,2013)．この地盤モデルをさらに高度化，詳細化するために，断層などの局所的な地盤の変化に対応させる手法を検討しており，深谷断層帯・綾瀬川断層帯近傍をテストサイトとし，詳細な探査，解析を実施している(先名ほか,2015)．本研究では，先名ほか（2015)に引き続き，微動探査結果を用いて断層の走向方向の地盤のＳ波速度構造と震動特性の変化を求め，さらに断層近傍で実測した地震動の解析結果との比較を行った． |
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| | 講演要旨(英文) | | We have created a subsurface structure model from seismic bedrock to ground surface in the Kanto region, which takes into account the period and amplification characteristics (Senna et al., 2013). In order to obtain a more sophisticated and detailed ground model, we have investigated a method, in which the ground model correspond to local change in the ground like a fault. And we have conducted a detailed survey and analysis for the Fukaya fault zone and the Ayasegawa fault zone neighborhood as a test site (Senna et al., 2015). In this study, based on the past research (Senna et al., 2015), we evaluated the changes in S-wave velocity structure and ground motion characteristics of the ground in the direction of fault strike by using records of microtremor survey. In addition, we compared analysis results for records of microtremor observation with that one for earthquake ground motion observed near the fault. |
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