石門土石壩強震資料之分析研究

Study on Earthquake Strong Motion of Shihmen Earth Dam

10.29679/VJ.201107.0015

沈國瑞

土石壩 ； 微地動 ； 頻譜分析 ； Earth dam ； Ambient vibration ； Spectral analysis

萬能學報

33期（2011 / 07 / 01）

211 - 224

繁體中文

石門水庫具有灌溉、發電、公共給水、防洪及觀光等五大效益，石門壩體安全性對北部地區農業生產、工業發展、人民生計影響重大。為了維持水庫在承受蓄水、洩洪、颱風、暴雨與地震下的正常運作，石門土石壩體中設置許多監測設施，其中為了監測地震時壩體結構的受震情況，壩體共設有五具強震儀，自民國94年設備更新後，經數次地震量測所得資料並無做進一步分析研究比較，本文擬(1)蒐集整理近年來大壩受震反應資料，分析強震頻譜共振頻率、頻譜比等重要特性，(2)比較壩頂和壩底強震儀測站受震反應，(3)壩體兩岸之振動週期比較。

Shihmen Reservoir was built for irrigation, generating electric power, water supply, preventing flood and tourism. Security of Shihmen Earth Dam is important for agricultural production, industrial development, the people's livelihood. In order to maintain water storage reservoir in bear, dissipation, typhoons, rainstorm under the normal operation of the earthquake, Shihmen Earth Dam install a number of monitoring facilities. To monitor earthquake damage, there are five seismometers installed on earth dam structure. In this paper, the author hopes to achieve the following works:1. To gather and collate recent seismic response data for the dam.2. Analyze the frequency spectrum and spectrum ratio for seismic records.2. Compare earthquake response between crest and the reference station in maintain gallery of Shihmen dam.3. Discuss predominate frequency of dam both side and study dam vibration amplitude related to the base material.Research results can provide management unit a reference of the vibration monitoring.

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