地震引致之壩體振動特性研究

Study on Properties of Earth Dam Vibration Induced by Earthquake

10.29679/VJ.201207.0018

沈國瑞；詹榮鑑；陳柏舟

土石壩 ； 頻譜分析 ； 回歸分析 ； earth dam ； spectral analysis ； regression analysis

萬能學報

34期（2012 / 07 / 01）

243 - 254

繁體中文

台灣地震多，為了確保桃園縣石門水庫之安全，石門大壩壩體中設置有地震記錄器等監測設施，本研究針對2005～2009的地震紀錄進行頻譜分析，探討土石壩壩頂對霸基的振動放大效應，同時針對水庫水位與地震規模對垂直及水平加速度之影響，進行初步比較分析，藉以了解各參數的影響程度。研究顯示水庫水位對土石壩壩頂震動加速度放大倍率影響並不明顯，地震規模對土石壩壩頂震動加速度放大倍率影響則較為明顯，不論垂直或水平加速度放大效應均呈現規模越小，震動加速度放大倍率越大的現象，本文亦將回歸分析成果於文中呈現。

This study is intended for spectrum analysis of the seismic record, discussion on earthquake magnitude and water level of reservoir on influence of amplification ratio of earth dam. Analysis results show that the relationship between the water level of reservoir and amplification ratio of earth dam is not clear. But the earthquake magnitude is obviously related to amplification ratio of earth dam. The bigger the magnitude of earthquake is, the less vibration amplification of earth dam crest is. The regression analysis results are also addressed in this paper.

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