短周期微動に含まれる表面波の性質と地盤構造の関係

書誌事項

タイトル別名
  • CHARCTERISTICS OF SURFACE WAVES IN SHORT-PERIOD MICROTREMORS AND THEIR RELATOIN TO SHEAR-WAVE STRUCTURES
  • タン シュウキ ビドウ ニ フクマレル ヒョウメンハ ノ セイシツ ト ジバン
  • Characteristics of surface waves in short-period microtremors and their relation to shear-wave structures

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Microtremor mesurements are conducted at two sites using arrays of three-component sensors. The frequency-wavenumber spectrum analysis of measured motions leads to the following conclusions: (1) Horizontal motions reflect combined characteristics of Rayleigh- and Love-waves, while vertical motions those of Rayleigh waves; (2) Rayleigh- and Love-wave characteristics can be extracted from radial and transverse horizontal motions if they are propagated from the same azimuth; and(3)Both vertical and horizontal motions tend to be inversely dispersive when the response spectra of higher-modes are equivalent to or greater than that of the fundamental-mode.

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