地震動の加速度記録より因果性を考慮して得られる変位のDrift成分に関する研究

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タイトル別名
  • A STUDY ON DRIFT COMPONENT OF DISPLACEMENT OBTAINED FROM STRONG MOTION ACCELEROGRAMS CONSIDERING CAUSALITY OF SEISMIC WAVES
  • ジシンドウ ノ カソクド キロク ヨリ インガセイ オ コウリョシテ エラレル

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抄録

This paper presents an idea of the processing of strong motion accelerograms considering causality of seismic waves. It is presented that, by the technique of FFT shown in Fig. 1, and by considering causality condition shown in Fig. 2, permanent displacements with some errors (in this paper, we call such displacements as drifts) can be obtaind even from accelerograms. The flowchart to calculate the drifts is indicated in Fig. 3. Examples of the drifts are shown in Figs. 7 and 8. For Imperial Valley earthquake, 1979, the calculated drift components can well explain the permanent displacements deduced from the fault motion.

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