PERFORMANCE VALUES APPLICABLE TO VERTICAL VIBRATIONS OCCURRING FROM VARIOUS EXCITATION SOURCES

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  • MATSUSHITA Hitoshi
    Research & Development Institute, Takenaka Corporation
  • NAGANUMA Shunsuke
    Graduate School, Tokyo Institute of Technology
  • INOUE Ryota
    Research & Development Institute, Takenaka Corporation, Dr.Eng.
  • YOKOYAMA Yutaka
    Prof., Dept. of Architecture and Building Eng., Graduate School of Science and Eng., Tokyo Institute of Technology

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  • 種々の加振源による鉛直振動に適用できる性能値
  • シュジュ ノ カシンゲン ニ ヨル エンチョク シンドウ ニ テキヨウ デキル セイノウチ

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 Floor vibration is an important factor in living conditions. Characteristics of these vibrations are varied by properties of excitation sources. Moreover, building occupants feel and evaluate various vibrations comprehensively. However, research on a comprehensive evaluation method for various vibrations has not been performed considerably. In this research, three categories were selected for environmental vibrations commonly occurring on a floor: “continuous vibrations, ” “walking vibrations, ” and “traffic vibrations.” 22 various vibration waveforms were selected from the categories, and we developed sensory evaluation tests for the vibration waveforms. Then, we searched for performance values that are relative to a human’s vibratory senses, and established a new value: “VLT(25ms, 60dB)=VLmax(25ms)+20log10(T1/4).” “VLmax(25ms)” is the maximum value of vibration levels (time const.=25ms) and “T” is the duration of vibration level over 60dB.

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