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研究生:劉星彣
研究生(外文):Hsing-Wen Liu
論文名稱:以井下陣列分析垂直向地盤運動
論文名稱(外文):Analysis of Vertical Ground Motion by Downhole Measurements
指導教授:蔡祁欽蔡祁欽引用關係
指導教授(外文):Chi-Chin Tsai
口試委員:陳正興邱俊翔
口試委員(外文):Cheng-Hsing ChenJiunn-Shyang Chiou
口試日期:2016-06-17
學位類別:碩士
校院名稱:國立中興大學
系所名稱:土木工程學系所
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2016
畢業學年度:104
語文別:中文
論文頁數:103
中文關鍵詞:垂直向運動地盤反應分析井下陣列
外文關鍵詞:vertical motionsite response analysisdownhole array
相關次數:
  • 被引用被引用:1
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最近研究指出垂直向地表運動對工程結構物之震動反應影響顯著,尤其是核電廠及大壩等結構物,然而過去大多數之地表運動預測或地盤反應分析只著重於探討水平向運動之行為,對於垂直向地表運動特徵及其與水平向運動關聯之認知亦相當有限。於工程實務上,對垂直向運動之反應譜直接假設為水平向運動之2/3倍,但在實際上兩者之關聯並非完全如此,會受場址效應影響而改變。
為了解場址效應對陣波於垂直向傳遞之影響,本研究透過蒐集五個不同區域、不同土層條件、不同地下水位及不同強度地震之井下陣列資料,觀察並分析井下陣列數據以探討垂直向波傳行為之特徵,並透過實際量測之傳遞函數判別土壤的非線性行為。本研究進行場址效應對垂直向運動影響之識別結果發現地震事件的強度對垂直向運動的影響並不大,且垂直向運動行為與地下水位之高低有關。另外本研究亦根據識別垂直向之場址效應,發展垂直向運動之地盤反應分析程序,以所提出之分析方法與井下陣列所得之實際測量值,以及過去在地震工程上所常用之分析方法比較,以驗證此研究方法之可行性。


Recent studies suggest that the effect of the vertical ground-motion component can be significant for the seismic response of engineering structures, especially for nuclear power plants and dam. However, most ground motion predictions or site response analyses have concentrated on horizontal ground motion. Knowledge with regard to the characteristics of vertical ground motion and, particularly, with regard to relating vertical and horizontal ground motions is rather limited. In the engineering practice, it’s usually assume that the acceleration spectrum of vertical motion is 2/3 of horizontal motion but such ratio is not always correct. To improve the seismic design of engineering structures, 3-component records of 5 downhole arrays, including different geological conditions, ground water tables, and intensity of motions, were analyzed to evaluate the differences of wave propagation in the vertical and horizontal direction. By means of transfer function of downhole measurements, it is found that the amplification of vertical motion is less significant than that of horizontal motion, the amplification behavior of vertical motion is more sensitive to the location of ground water table, and the amplification behavior of vertical motion is less dependent on the intensity of motion. Based on the observed behavior, a benchmark site response analysis method for vertical motion was developed and verified by the downhole array measurements.

致謝 i
摘要 iii
Abstract iv
圖目錄 vii
表目錄 x
1. 第一章 緒論 1
2. 第二章 文獻回顧 3
2.1 場址效應 3
2.2 地震中之垂直向地盤震動 4
2.3影響垂直向運動之因素 5
2.3.1 地表紀錄之觀察 5
2.3.2 井下陣列之觀察 5
2.3.3 不同因子對垂直運動造成之影響 6
2.4 地盤反應分析 6
2.4.1 頻率域線性地盤反應分析 7
2.4.2 頻率域等值線性地盤反應分析 9
2.4.3 垂直向運動於地盤反應分析 10
3. 第三章 研究主題與方法 16
3.1 概述 16
3.2 井下陣列 16
3.2.1 台灣羅東 Lotung Large Scale Seismic Test 17
3.2.2 美國加州 La Cienega Geotech Array 17
3.2.3 美國加州 Corona - I15/Hwy 91 Geotech Array 18
3.2.4 美國加州 Wildlife Liquefaction Array 18
3.2.5 美國加州 Turkey Flat試驗場 18
3.3場址效應對垂直向運動影響之識別方法 19
3.4土壤受垂直向運動之非線性行為 20
3.5垂直向地盤反應分析之參數 21
3.5.1 頻率域線性分析參數 21
3.5.2 頻率域等值線性分析參數 23
4. 第四章 分析結果與比較 38
4.1垂直向與水平向運動之非線性差異 38
4.2垂直向運動地盤反應分析之動態參數 39
4.2.1土層波速 39
4.2.2 土壤阻尼 41
4.3 垂直向運動地盤反應分析之非線性曲線 42
4.3.1 束制模數曲線 42
4.3.2 阻尼曲線 43
4.4 小地震之線性分析驗證 43
4.5 大地震之等值線性分析驗證 44
4.6 垂直向運動於各陣列之大地震分析方法比較 45
5. 第五章結論與建議 98
5.1 結論 98
5.2 建議 100
6. 參考文獻 101

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