頁籤選單縮合
題 名 | 渠道底床動力反應之研究=Dynamic Responses of a Channel Bed |
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作 者 | 謝平城; 謝文博; | 書刊名 | 水土保持學報 |
卷 期 | 36:1 2004.03[民93.03] |
頁 次 | 頁85-95 |
分類號 | 441.12 |
關鍵詞 | 多層土層; 孔隙彈性介質理論; 滲流力; Multiple soil layers; Poroelastic theory; Seepage force; |
語 文 | 中文(Chinese) |
中文摘要 | 以往研究渠底之土層於週期波作用下之動力反應大多侷限於半無限域或有限域之單一土層,但於自然情況下土壤分佈應為多層土層;本文即嘗試以解析方式來探討多層土層分佈之動力反應。本文之水體部分係採用勢流理論,土體部分則以Biot孔隙彈性介質理論分析。結果發現當土層厚度小於四分之一波長時,其動力反應與單一土層所得之結果有明顯的差異,而滲流力分析則可發現土壤發生不穩定之位置通常為水波之波谷附近,而波峰處則產生壓密現象。 |
英文摘要 | In the past dynamic responses of a channel bed induced by linear water waves are almost limited to a soil layer of infinite thickness, but the soil distribution should be multi-layered in the nature. This study tried to clarify analytically the dynamic responses of multiple soil layers. The water is governed by potential model, and the soil is analyzed by Biot's theory of poroelasticity. The results show that when the thickness of the soil layer is less than one-fourth wavelength, the dynamic responses are different from the case of a single soil layer. Analysis of seepage force shows that the channel bed will be unstable only near the troughs of water waves, and will be consolidated only near the peak of water waves. |
本系統中英文摘要資訊取自各篇刊載內容。