Response of Elasto-Plastic Structure Excited by Artificial Earthquake Ground Motion with Given Non-Stationary Time-Frequency Characteristic
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概要
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A design basis ground motion is usually defined to be compatible with a given response spectrum which is a useful measure of linear dynamic response of a structure. It has been known that the variance of maximum displacement responses to artificial ground motions in elasto-plasric region is quite large, although every artificial ground motion fits the same design response spectrum. Recently, a new synthesis method was proposed by Masuda, et al. that can generate artificial earthquake ground motions compatible with given time-frequency characteristic as well as a given response spectrum. In this paper, a group of artificial earthquake ground motions are generated, and elasto-plastic response analyses are carried out to examine variance of structural responses in elasto-plastic region. It is revealed that the variance of the structural responses to the earthquake ground motions generated by Masudas method is less than that to the seismic ground motions by the conventional design method. And it is suggested that the given time-frequency characteristic has an effect on the variance of maximum responses.
著者
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MASUDA Arata
Department of Mechanical and System Engineering, Kyoto Institute of Technology
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Sone Akira
Department Of Mechanical And System Engineering Faculty Of Engineering And Design Kyoto Institute Of
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IBA Daisuke
Department of Mechanical and System Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology
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ICHIHASHI Ichiro
Division of Design Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology
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