PROPOSAL OF VECTOR FREQUENCY RESPONSE FUNCTION OF GROUND BASED ON VECTOR SPECTRUM AND ITS APPLICATION

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  • ベクトルスペクトルによる地震動の増幅特性評価とその適用
  • ベクトル スペクトル ニヨル ジシンドウ ノ ゾウフク トクセイ ヒョウカ ト

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Abstract

A new method for calculating spectrum with respect to horizontal earthquake motion as vector is intruduced. The spectrum is named herein as “Vector spectrum”. Furthermore, a new method for calculating the frequency response function based on the vector spectrum is proposed. These methods were applied to the observed earthquake motion and were compared with the results calculated by the usual method. As a result of these, it is found that vector spectrum is useful to evaluate the frequency characteristics of horizontal earthquake motion quantitatively and that the proposed frequency response function is also useful as the index to represent the amplification characteristics of earthquqke motion because it has the high equivalency and stability in comparison with the usual method.

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