| 講演要旨(和文) | | トルコ西部のエスキシェヒル県中心部は，エスキシェヒル盆地に南部に位置し，周辺にある活断層による地震の可能性も指摘されており，地震防災は同地域にとって無視できない問題である．この研究では，エスキシェヒル盆地の強震観測点において微動探査および表面波探査を実施し．浅部および深部地盤のＳ波速度構造を明らかにした．さらに，同地域の建物の屋上もしくは最上階と地表面での微動の同時観測を実施し、建物の振動特性を明らかにした。 |
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| | 講演要旨(英文) | | We have conducted microtremor explorations and surface-wave explorations for shallow soil S-wave velocity distributions at strong motion stations in Eskisehir basin, western Turkey. Microtremor explorations for deep S-wave profiles have also been conducted at some of the stations using large temporary arrays. The phase velocities in a wide frequency range at each station were estimated by integrating individual results. Furthermore we made microtremor observations in buildings with 3 to 14 stories in the area to investigate their vibrational characteristics. Predominant periods and damping factors were estimated from spectral ratios between top of a building and ground-surface. Shallow microtremor explorations have been conducted at the sites of the building surveys, too. |
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