| 研究生: |
詹子賢 Jan, Tz-Shian |
|---|---|
| 論文名稱: |
應用井下陣列資料探討不同地盤反應分析程序之差異性 Comparisons of Ground Response Analysis Procedures with Downhole Array Data |
| 指導教授: |
張文忠
Chang, Wen-Jong |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2014 |
| 畢業學年度: | 102 |
| 語文別: | 中文 |
| 論文頁數: | 122 |
| 中文關鍵詞: | 井下陣列 、地盤反應分析 、等值線性分析 、非線性分析 、SHAKE91 、Cyclic1D 、DEEPSOIL 、FLAC2D |
| 外文關鍵詞: | downhole array, site response analysis, equivalent linear analysis, nonlinear analysis, SHAKE91, Cyclic1D, DEEPSOIL, FLAC2D |
| 相關次數: | 點閱:98 下載:3 |
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本研究以不同地盤反應分析程序對單一場址進行一維的地盤反應分析,比較不同震幅下其土層加速度與孔隙水壓力歷時,並以井下陣列土層加速度與孔隙水壓力歷時資料比較,分析時以井下陣列底部記錄之地盤加速度為模型輸入底部邊界,利用小地震資料校正場址的土層模型,而後以校正完的土層模型應用於大震幅地震資料分析與比對,並加入孔隙水壓資料進行模擬比較以探討不同地盤反應分析程序對模擬地盤反應的差異性。主要比較非線性與等值線性分析法及總應力與有效應力法在地盤反應的結果,使用四種不同的分析程序SHAKE91、Cyclic1D、FLAC2D、DEEPOSIL進行場址土層的地盤反應分析,分別在時間域與頻率域中進行討論,並使用Cyclic1D、DEEPSOIL、FLAC2D模擬現地孔隙水壓的受震行為,最後探討不同分析程序間的差異性。研究結果顯示:(1)SHAKE91僅適合分析小震幅地震,對大震幅地震的模擬較差,而大震幅地震模擬中,FLAC2D的模擬結果較接近現地反應,(2)以耦合有效應力分析為架構的Cyclic1D,模擬的水壓反應較接近現地孔隙水的受震行為,(3)在模擬土層震動反應方面,非線性分析優於等值線性分析,且耦合分析優於非耦合分析。
The goals of this research are to compare four site response analysis procedures with downhole array data in Taiwan. The procedures include equivalent linear analysis (SHAKE) and fully nonlinear analyses (Cyclic1D, DEEPSOIL, FLAC2D) that can be further divided into a fully coupled effective stress analysis and uncoupled effective stress analysis. In the aspect of site response simulation, the bottom of the downhole array data is selected as the input motion. Small earthquake analyses are performed to verify the ground model. A large earthquake event with significant excess pore pressure generation is used to compare the performance of the four procedures. Comparisons indicate that: (1) SHAKE91 is only applicable to small earthquakes and FLAC2D are the best of the four procedures in terms of predicting ground accelerations and pore pressure generation; (2) Cyclic1D is the best in predicting the generation of excess pore pressure; (3) nonlinear analyses are better in predicting larger earthquake responses than an equivalent linear analysis and fully coupled effective analyses perform better than uncoupled effective analyses.
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