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研究生: 徐慧齡
Hsu, Hui-Ling
論文名稱: 探討移動荷載下影響鋪面穩態位移之參數
Parametric Study of Steady-State Deflection of Pavement Slabs under Moving Loads
指導教授: 郭振銘
Kuo, Chen-Ming
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: 2008
畢業學年度: 96
語文別: 中文
論文頁數: 44
中文關鍵詞: 穩態移動荷載無限大版相對勁度半徑
外文關鍵詞: moving load, radius of relative stiffness, infinite plate, distance lag
相關次數: 點閱:90下載:3
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  • 針對車輛移動引起鋪面結構變形的動力問題,本研究引用之解析閉合解,係由假設路基為Kelvin基礎,移動集中荷載以等速運動於無限大版上之控制方程式求解而得。在考慮阻尼為0時,可相當於將版塊置於Winkler基礎上之穩態解析解。
    本研究為克服雙重傅立葉轉換所牽涉之不定積分難題,以二維梯形法對位移方程式作數值積分,求解版塊位移,並探討數值方法的收斂性與精準度。並進一步分析路基參數對版塊位移之影響。同時探討不同速度比之移動載重與不同阻尼比之彈性支承版組合下對鋪面版位移之影響。結果顯示,當不考慮路基阻尼時,版塊最大位移出現在載重中心點正下方;而當考慮路基阻尼時,移動荷載將造成位移的延遲效應。同時獲得鋪面結構參數與鋪面版穩態位移之無因次關係圖。

    To investigate the dynamic response to moving vehicles, a rigid infinite plate on Kelvin foundation subjected to moving load is used to model the pavement. A special case as Winkler foundation when damping ratio equals to zero is considered in this study ,too. Governing equation is derived by using integral transform method. Double Fourier transform and Laplace transform are used to make the governing equation easily to solve.
    To calculate the value of deflection equation, an numerical integral method with two dimensional trapezoid rule is used to solve the indefinite integral problem in this study. The convergence and precision of the numerical method are also discussed. The effect of the coefficients of pavement and foundation to the response of the plate is analysed. The effect of moving load under different velocity ratio and foundation with different damping ratio to pavement plate response is concerned, too. As the result, maximum deflection of plate will occur under the center of the applied load when damping is not considered. If damping is included into considering, the effect of distance lag will be excited by the velocity of moving load. Finally, a figure of pavement coefficients versus the response of the plate with dimensionless analysis is established.

    摘要....................................................Ⅰ Abstract................................................Ⅱ 致謝...................................................III 目錄....................................................Ⅳ 表目錄..................................................Ⅵ 圖目錄.................................................VII 第一章 緒論............................................1 1-1 前言.................................................1 1-2 研究動機與目的 .......................................1 1-3 文獻回顧.............................................2 1-4 研究範圍與方法 .......................................3 1-5論文架構及流程圖......................................3 第二章 穩態模型之解析解................................5 2-1 控制方程式...........................................5 2-2 模型方程式之求解.....................................7 2-3 模型之穩態撓度.....................................10 2-4 模型臨界參數之定義.................................12 第三章 穩態模型之數值解...............................13 3-1 數值求解方法........................................13 3-2 常用靜態模型簡介....................................21 3-3 模型求解之驗證 ......................................26 第四章 參數分析與穩態響應 .............................30 4-1 版塊參數反應分析....................................30 4-2 路基參數反應分析....................................35 4-3 速度比對版塊反應分析................................37 4-4 阻尼速度比對版塊反應分析............................37 4-5 相對勁度半徑對版塊反應分析..........................38 4-6 位移延遲效應........................................39 第五章 結論與建議.....................................41 5-1 結論 ...............................................41 5-2 建議 ...............................................41 參考文獻................................................42

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