長周期地震動階級の継続時間スペクトル  [in Japanese] Duration Spectra for Long-period Ground Motion Intensity Scale  [in Japanese]

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Abstract

水平2成分の絶対速度応答のベクトル合成波形に基づいて、長周期地震動階級に対して、2つの定義 ("Bracketed"および "Uniform") に基づく継続時間<i>D</i><sub>B</sub>および<i>D</i><sub>U</sub>を評価し、その結果を継続時間スペクトルで表現する方法を示した。<i>D</i><sub>U</sub>評価のための包絡波形の算出方法として、固有周期の半周期の時間幅でピークホールドする方法を採用した。評価事例を通じて<i>D</i><sub>B</sub>と<i>D</i><sub>U</sub>の特徴や、振幅レベルおよび周期特性との関係について考察した。

A method has been proposed for evaluating bracketed and uniform durations of long-period ground motion intensity scale based on Euclidean norm of two horizontal components of absolute velocity response. The results are represented as duration spectra. An envelope required for evaluation of uniform duration is derived by applying peak-hold method using time window with half width of natural period. Numerical examples are shown. The relationships between bracketed/uniform durations, amplitude level and predominant period are discussed.

Journal

  • Journal of Japan Association for Earthquake Engineering

    Journal of Japan Association for Earthquake Engineering 15(6), 6_142-6_147, 2015

    JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING

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