EVALUATION OF THICKNESS AND SURFACE LAYER S-WAVE VELOCITY OF THE TWO LAYERED SUBSURFACE MODEL BY DISPERSION CURVE AND H/V SPECTRUM

  • KOIE Moeko
    Former Dept. of Architecture, Waseda Univ. / Kobori Research Complex Inc.
  • MAEDA Toshiro
    Dept. of Architecture, Waseda Univ.

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Other Title
  • 分散曲線とH/Vスペクトルによる2層地盤モデルの表層S波速度と表層厚の導出手法
  • ブンサン キョクセン ト H/Vスペクトル ニ ヨル 2ソウ ジバン モデル ノ ヒョウソウ Sハ ソクド ト ヒョウソウコウ ノ ドウシュツ シュホウ

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<p>Subsurface structure model is constructed by simulating dispersion curves usually by GA with reference data such as PS logging. When the reference data is not available or micro-tremor array radius is inadequate for the wavelength of interest, method to infer a simpler subsurface model such as a two-layered model is desirable. We propose the method to deduce surface layer thickness and shear wave velocity of the model by resorting to quarter wavelength theory and the concept of wavelength-thickness ratio. The method itself and the wavelength-thickness ratio is tested by PS logging data at K-NET and KiK-net observation sites.</p>

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