地震動波形の位相差分および位相差分分布に関する基本的性質

概要

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Recently several studies have been carried out to reveal the important role of the phase difference distribution to determine the earthquake ground motion time history. Possible application methods of the phase difference concept for the generation of simulated earthquake motions have also been proposed. This paper investigates the relationship between the phase difference distribution and the envelope shape of time history in detail, by considering the effects of the definition region of the phase difference and the Fourier amplitude of corresponding components. The phase difference characteristics of earthquake motion time histories with zero values added at the end in various lengths and those of eighty two motions recorded at rock sites are also investigated. The correspondense between the standard deviation of phase differnces and the envelope shape of time history is improved by a proposed definition of phase differences and the introduction of weighting by the Fourier amplitude.
社団法人日本建築学会の論文
1988-04-30