掲載雑誌（和）：
日本地震工学シンポジウム講演集
Vol：
5巻
年：
1978年
頁：
257-264頁
著者（和）：
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タイトル（和）：
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抄録（和）：
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キーワード（和）：
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掲載雑誌（英）：
PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM
著者（英）：
Yoshimasa KOBAYASHI, Toshiro FUJIWARA
タイトル（英）：
GROUND MOTIONS OF LONGER PERIODS IN STRONG EARTHQUAKES
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抄録（英）：
Seismograms in the Niigata earthquake 1964, the Tokachioki earthquake 1968 and its largest aftershock registered by JMA-type strong-motion seismographs are analysed. Procedures for data processing are described. Response spectra of the seismograms are computed for periods from 2 to 50 seconds, and the results are compared with those of SMAC records at almost the same sites in the common period range, yielding a satisfactory agreement. The frequency of relative-velocity spectra are almost flat in the period range computed, which fact implies ■-square law in that range. Levels of the spectra at several sites suggest a strong effect of site conditions, and as a result a formula of the level as a function of the earthquake magnitude, distance, etc. could not be determined.
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委員会論文集