English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

著者らは地震波形の収集が困難な自治体観測点を対象に最大地動加速度と計測震度の地盤増幅度からサイト特性を推定する手法を提案しているこの手法はサイト特性の周期0.11秒における任意区間の平均増幅度は精度良く推定できたが周期12秒では推定精度が良くなかった本研究では周期12秒のサイト特性の推定精度を向上させるために地震動の周期12秒成分の相対的な強さと相関がある最大加速度比をサイト特性推定の際に考慮した推定にあたりM7前後の地震観測記録から計算した最大加速度比とサイト特性の周期12秒の増幅度の相関を調べたところ両者に良好な相関が見られた地盤増幅度と最大加速度比をパラメータとする式によってサイト特性を求めたところ周期12秒におけるサイト特性の観測値と推定値の相関係数が向上したまたほとんどの周期帯で相関係数が0.9を超えていた  This paper deals with estimation of a site effect of local government observation sites. We have already proposed the method to evaluate site effect by using PGA and JMA seismic intensity obtained at local government observation site because it is difficult to obtain waveform records there. This method can be accurately evaluate an averaged amplification factor of site effect in arbitrary range of period from 0.1 to 1second, but not accurately evaluate it between 1 and 2 second. In this study, peak acceleration ratio related to relative amplitude of earthquake spectrum in this period range was considered in evaluation in order to improve the accuracy of evaluation of the site effect in this period range. The correlation between peak acceleration ratios calculated from records observed in earthquakes of about magnitude 7 and the site effect in this period range was estimated. Since both have a good correlation, site effects were evaluated by formula in terms of amplification factors and peak acceleration ratio. As a result, correlation between observed site effect and evaluated one in this period range was improved, and its correlation coefficient were more than 0.9 in almost all period range

A STUDY ON ESTIMATION OF SITE EFFECT OF LOCAL GOVERNMENT OBSERVATION SITES USING AMPLIFICATION FACTORS AND PEAK ACCELERATION RATIO