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題 名 | 矩形條狀填充槽溝對表面波振動之阻隔效應=Screening Effect of Surface Waves by Rectangulaer Strip In-Filled Trenches |
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作 者 | 倪勝火; 洪昌祺; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 10:3 1998.09[民87.09] |
頁 次 | 頁457-465 |
分類號 | 441.12 |
關鍵詞 | 振動; 表面波; 阻隔; 槽溝; Vibration; Surface wave; Isolation; Trench; |
語 文 | 中文(Chinese) |
中文摘要 | 本文係應用頻率域邊界元素法,在平面應變情況下, 以常數元素分析填充槽溝 對條形基礎承受垂直方向簡諧振動的阻隔控制效果。文中以無因次方式改變填充槽溝的幾何 尺寸、土壤介質的柏松比、振動基礎之沉埋深度以及填充材料與土壤介質間之剪力波速比等 參數,以作為影響震波阻隔效果之研究,並以平均振幅降低比來表示填充溝槽對震波之阻隔 控制效果。分析結果顯示,填充槽溝的幾何尺寸和填充材料與週邊土壤之剪力波速比對震波 阻隔控制效果影響很大,而其餘各參數之影響則相對不大。 |
英文摘要 | The screening effect of surface waves by in-filled trenches is numerically studied. The reduction in vibration amplitude by the trench is solved using the boundary element method (BEM) in frequency domain together with constant elements under the condition of plane strain subjected to vertical harmonic vibration. Dimensionless parametric studies are performed to assess the screening effects of the trench in terms of the geometry, in-filled material, foundation embedment and shear wave velocity ratio of in-filled material to the surrounding soil. Results show that the screening effectiveness of the in-filled trench depends highly on the trench geometry and the velocity ratio of the in-filled material to the surrounding soil. The embedment ratio of the foundation and other factors are relatively unimportant. |
本系統中英文摘要資訊取自各篇刊載內容。