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研究生:蔡浻祥
研究生(外文):Weng-Shiang Tsai
論文名稱:加勁邊坡動態行為模擬之分析
指導教授:陳景文陳景文引用關係
指導教授(外文):Jing-Wen Chen
學位類別:碩士
校院名稱:國立成功大學
系所名稱:土木工程學系碩博士班
學門:工程學門
學類:土木工程學類
論文種類:學術論文
畢業學年度:93
語文別:中文
論文頁數:105
中文關鍵詞:加勁模擬
外文關鍵詞:FLACsimulationreinforce
相關次數:
  • 被引用被引用:5
  • 點閱點閱:268
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  • 下載下載:30
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摘 要
  本研究以二維有限差分法程式FLAC(Fast Lagrangian Analysis of Continua),建立數值模型,使用Duncan(1980)提出的雙曲線土壤模數模型來修正在不同圍壓下的土壤模數,並利用Rankine靜止土壓力修正砂箱與土壤間側向摩擦力的影響。

  研究首先以華盛頓大學Perez(1999)所做的振動台試驗進行動態行為之模擬,並且對於振動台砂箱所造成的摩擦力進行合理的振動力折減,模擬的結果與試驗量測到的坡面變位、坡體位移等,進行比對,以確定此模型在模擬動態行為可達一定的合理程度,並分析各種加勁材的參數,探討對加勁邊坡坡面變形,土體內部變位與應力狀況等之影響,藉以更進一步了解加勁邊坡動態行為。

  結果發現,加勁材埋設長度、加勁材強度與加勁材之間的間距對於加勁邊坡的動態行為有顯著的影響,埋設長度越長、加勁材強度越強或加勁材之間的間距減小,可有效的提高加勁邊坡的強度,降低坡面與土體的位移量。
目 錄
摘 要 I
誌 謝 II
目 錄 IV
表 目 錄 VIII
圖 目 錄 IX
符號說明表 XIII
第一章 緒論 1
1.1 前言 1
1.2 研究動機與目的 1
1.3 研究方法與流程 2
1.4 論文內容 2
第二章 文獻回顧 4
2.1 擋土結構物介紹 4
2.2 加勁邊坡原理 6
2.3 加勁邊坡穩定分析 9
2.3.1 極限平衡分析法 9
2.3.2 工作應力分析法 11
2.4 加勁土壤分析模型 12
2.4.1 分離元素模型 12
2.4.2 複合元素模型 14
2.4.3 數值分析法介紹 14
2.5 加勁邊坡動態分析 17
2.5.1 擬靜態土壓力原理 17
2.5.2 地震加速度係數之選定 18
2.6 模型試驗 20
第三章 加勁邊坡模擬之發展 24
3.1 FLAC程式介紹 24
3.2 FLAC內建材料模式 29
3.2.1 彈性材料模式 29
3.2.2 橫向等向性材料模式 29
3.2.3 莫爾庫倫材料模式 29
3.2.4 空洞模式 30
3.3 FLAC界面元素 30
3.4 FLAC內建結構元素 31
3.5 發展數值模型 32
3.5.1 模型建立 32
3.5.2 土壤模型 33
3.5.3 加勁材料模型 35
3.5.4 面版 37
3.5.5 平衡準則 37
3.5.7 加勁邊坡建造 38
3.6 動態分析 38
3.6.1 輸入振動 39
3.6.2 邊界設定 39
3.6.3 阻尼系統 45
3.7 數值分析修正 47
第四章 數值模擬 51
4.1 振動台試驗介紹 51
4.1.1 振動台試驗設備介紹 51
4.1.2試驗過程 52
4.1.3邊界效應 53
4.1.4 振動台試驗結果 56
4.2 數值分析過程 59
4.2.1 模型建立 59
4.2.2 輸入振動 60
4.2.3 阻尼系統 60
4.3 模擬結果討論 65
4.3.1坡面變位 65
4.3.2土體變位 76
4.3.3土體應力分佈 80
4.3.4降伏加速度 82
第五章 結論與建議 87
5.1 結論 87
5.2 建議 88
參考文獻 89
附錄A 土體變位圖 94
附錄B 土體應力圖 100
參考文獻
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