請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/16344
標題: P波顯著週期在地震邊坡災害早期預警之研究-以九份二山為例
Study on P-wave Predominant Period for Earthquake Early Warning of Hazardous Slope - Case Study of Chiufenershan
作者: 吳俊賢
Wu, Chun-Hsien
關鍵字: slope disaster
邊坡災害
P wave warning
predominant period
P波預警
顯著週期
出版社: 土木工程學系所
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摘要: Due to the rapid urban development in recent years, there are more and more constructions on the hill slopes surrounding the cities. When those buildings encountered earthquakes or typhoons, it is frequently causing landslide disasters in this area. This study focuses on the earthquake early warning of hazardous slopes. The P-wave early warning theory was applied, that is based on the correlation of P-wave predominant period and magnitude of earthquake. Since the more hazardous S-wave arrives later then P-wave, we can issue a warning for a potential slope disaster. Base on the P-wave predominant period concept proposed by Allen(2003), this study aimed to find relation of predominant period and magnitude for the Chiufenershan landslide. The seismic records from 4 seismic monitoring station of Central Weather Bureau near the Chiufenershan (Guosing primary school station, Beishan primary school station, Yuchi station, and National Chi Nan University station) in the past 10 years were obtained and applied for the correlation analysis. A MATALB program was developed to carry out numerical computing. Then the relations of the earthquake magnitude and predominant period in every station were obtained and studied. In addition to above correlation analysis, the effects of the monitoring location (topographic and geology), the epicenter (relative distance and orientation) and the magnitude were also studied and discussed. The results show that the correlations of predominant period and magnitude in different stations, with different topographic, epicenter position and earthquake magnitude, are not the same. However, this study obtained the regression relations which could be applied to the earthquake early warning of Chiufenershan landslide area.
近年來由於社會經濟的快速發展,因此有部分的開發已逐漸轉移到離都市較接近的山坡地上,但是許多正在開發中的邊坡並非的都具有穩定力學平衡機制,因此如果遭遇地震等其他天然災害侵襲時,很容易造成大量的土石滑動而使得居住在附近的人們造成生命財產的損失。而本文擬探討邊坡之地震預警問題,在地表發生初始震動時所產生之P波,找出不同地震事件下P波的顯著週期與其地震規模的迴歸關係,在破壞性的地震波尚未到達前推估其地震規模或強度,對地震可能產生邊坡災害的地區提出警告。 本文採用Allen(2003),所提出之地震P波顯著週期概念,以顯著週期與地震預警的關係來進行預警,本研究以九份二山為探討區域,藉由中央氣象局提供在九份二山附近4個測站(國姓國小測站、北山國小測站、魚池測站、暨南大學測站)近10年內附近的強地動資料,利用MATLAB程式的計算處理,找出各個測站間地震規模與顯著週期的關係。 此外本研究也利用各個測站的強地動資料找出顯著週期與地震規模的迴歸關係,探討測站設置的地點受地形、地質等因素之影響,除比對各個測站在相同地震事件之顯著週期,並進一步探討顯著週期對地震規模受震央距離及其相對方位之影響,從研究中發現,不同地點的測站會因為受地形、震央距離以及方位等因素之影響,使得量測之P波的顯著週期會有所不同。而在文章最後,本研究將提出建議之迴歸關係式,供九份二山在未來地震預警之用。
URI: http://hdl.handle.net/11455/16344
其他識別: U0005-3007201013423100
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-3007201013423100
顯示於類別:土木工程學系所

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