| 研究生: |
王韋樵 Wang, Wei-Chiao |
|---|---|
| 論文名稱: |
南部科學園區填充槽溝減振效能之分析 |
| 指導教授: |
倪勝火
Ni, Sheng-Huoo |
| 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: | 2005 |
| 畢業學年度: | 93 |
| 語文別: | 中文 |
| 論文頁數: | 161 |
| 中文關鍵詞: | 彈性減振牆 、減振效能 、阻尼係數 、槽溝 、衰減 |
| 相關次數: | 點閱:100 下載:2 |
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本文之研究分為現地衰減試驗及槽溝減振試驗,現地衰減試驗主要在探討在穩態振動下振波衰減之情形,並求得材料阻尼係數α及幾何阻尼係數n。而在槽溝減振試驗分面,則是探討彈性減振牆之減振效能,試驗中所使用之參數包含基礎振動頻率及槽溝之幾何尺寸,試驗結果分別以振幅降低比、RMS dB振幅分析法及平均振幅降低比 來分析彈性牆對振波之阻隔效果。
現地衰減試驗分析結果顯示,能量越大則阻尼係數亦越大,而在應變量較大時,阻尼係數不一定會隨著頻率增加而增大,與一般低振幅剪力波速下之分析結果有所不同,若與文獻建議值比較,本文之分析結果亦在其範圍內。
現地減振試驗之分析結果則顯示,當起振器出力平行車行方向時,彈性減振牆欲達有效阻隔效果,槽溝之深度參數D需為1.5倍之雷利波波長。若同時考慮深度參數D及寬度參數W,則面積參數A(W×D)需為0.15以上,才可達有效阻波效果。將此分析結果與黃富雄(2004)含水膜包填充槽溝之試驗結果比較可得知此二槽溝減振情形大致相同。
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