掲載雑誌（和）：
日本地震工学シンポジウム講演集
Vol：
4巻
年：
1975年
頁：
1051-1058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）：
Masaru HOSHIYA, Toshiaki CHIBA
タイトル（英）：
PHYSICAL SPECTRUM OF EARTHQUAKE ACCELERATION
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抄録（英）：
With the fact that earthquake ground surface motions are nonstationary in the amplitude and frequency contents, this study discussed a method, (1) to measure the nonstationary characteristics by a physically meaningful nonstationary spectrum, and (2) to generate an artificial earthquake acceleration with the same nonstationary characteristics representing an original earthquake record. In order to throw light on the nonstationary characteristics of earthquake data, this paper uses a physical spectrum defined by S(■,■；W) = E ■W(t-u)x(u)e ■ ; ■ < ■ < ■ where is a time window function which satisfies ■(t) dt = 1 A Niigata acceleration record of N-S component is actually analyzed and based on the estimated spectrum of a Niigata record, a stochastic simulation of a nonstationary random process is theoretically developed. The following conclusions are made ; (1) Physical spectral concept can be of great use for analysis of nonstationary earthquake data. (2) Theory of simulation of a nonstationary earthquakth prescribed amplitude and frequency nonstationarities is established.
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キーワード（英）：
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委員会論文集