查詢結果分析
相關文獻
- 應用有限元素法之暫態流模式探討堰塞壩潰壩時間
- Modified Finite Element Solutions for Planar Entry Flow of an Oldroyd-B Fluid
- Torsional Vibration Analysis of a Damped Shaft System
- 汽機葉片之機械力學分析研究
- 通勤者在平面道路與捷運路網上之運具與路線選擇
- p-Version Space-Time Least-Squares Finite-Element Method for Shallow-Water Equations
- T-型模具之有限元素法PID溫度控制分析
- 股脛關節之有限元素接觸應力分析
- 全觸式鞋內墊與足部之生物力學評估
- 機車安全帽之動態有限元素分析
頁籤選單縮合
題 名 | 應用有限元素法之暫態流模式探討堰塞壩潰壩時間=Finite-Element and Transient Flow Modeling of the Landslide Dam Failure Time |
---|---|
作 者 | 陳宥序; 游繁結; 張光宗; 馮正一; | 書刊名 | 水土保持學報 |
卷 期 | 44:3 2012.09[民101.09] |
頁 次 | 頁283-294 |
分類號 | 440.137 |
關鍵詞 | 堰塞壩; 防滲牆; 有限元素法; 暫態流; Landslide dam; Seepage prevention structure; Finite element method; Transient flow; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以建立減災工法之數值分析流程為主要目的,使用有限元素分析軟體PLAXIS 2D 建立壩體與減災工法之分析流程,並對條件參數控制狀態下進行模擬,對減災工法提升壩體安 全性進行分析與評估。此研究參考於惠蓀林場之人造壩建立數值模型,模擬之模式採用暫態流 (transient flow)之方式,能觀察出滲流隨時間的變化。土壤應力模式依據Bishop 公式,此公式 考慮未飽和區的負孔隙水壓,較一般常用的Terzaghi 應力模式更適合用在未飽和土壤的情況。 壩體、河床之滲透係數採用PLAXIS 程式內依據USDA 與Van Genuchten 所建議的參考值。本 計畫對堰塞壩、河床之滲透係數做參數影響分析,顯示堰塞壩與河床之滲透係數皆會對堰塞壩 之穩定性產生影響,滲透係數越高,壩體之穩定性越低。在減災方面採用防滲牆之工法,模擬 在不同位置、深度的防滲流功效,得到防滲牆的貫入深度需貫入至河床以下、貫入位置應盡量 靠近壩頂上游端之結論。 |
英文摘要 | The purpose of this project is to find suitable engineering measures for disaster prevention. The software of PLAXIS 2D of the finite element method is adopted to evaluate the performance of the engineering measures and to do the parametric study. The numerical model simulates the artificial dam at Huisun using the transient flowanalysis. The seepage takes negative pore pressure into account with Bishop`s equations, which are superior to Terzaghi`s equations for the unsaturated soil conditions. The parameters of the dam and the riverbed are chosen according to USDA and Van Genuchten. The results show that the permeability of the dam and riverbed influence the stability of the dam. The higher the permeability, the lower stability the dam. The seepage prevention structures are used to improve the dam stability. The simulated results show that the seepage prevention should penetrate into the riverbed and be positioned as close to the upstream side of the dam as possible. |
本系統中英文摘要資訊取自各篇刊載內容。