分割地盤モデルによる速度構造と減衰特性の同定 －福井県のKiK-net観測地点を対象として－
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概要
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By using a moderately divided soil model compared to the former thin layered one, velocity and damping structures of KiK-net observation sites in Fukui Prefecture were reexamined by optimizing the observed seismic transfer function using the genetic algorithm. From the results soil velocity models having damping property were proposed. Theoretical H/V spectra of the fundamental mode of Rayleigh wave of the proposed velocity model matched better the microremor observation result. The obtained empirical relationships of the damping coefficients were almost the same as the former one, but as to rock a slight change was made. Namely, if the S wave velocity of rock was less than 1000m/s, the internal damping coefficients were about 33, and if more than 1000m/s, they were about 24.
- 2010-06-30
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