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研究生:石俊雄
研究生(外文):Shih, Chun-Hsiung
論文名稱:撓度指標法之視窗化資料庫回算軟體建立
論文名稱(外文):Establishment of Windows Program for Data-Base Backcalculation with Defletion Indices
指導教授:張德文張德文引用關係
指導教授(外文):Chang, Der-Wen
學位類別:碩士
校院名稱:淡江大學
系所名稱:土木工程學系
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:1998
畢業學年度:86
語文別:中文
論文頁數:162
中文關鍵詞:動態回算撓度指標衝擊試驗資料庫視窗軟體
外文關鍵詞:dynamic backcalculationdefletion indeximpulsive testdata-basewindows program
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  • 被引用被引用:8
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  以動態應力分析為基礎發展回算程式,經理論及初步之試驗數據驗證,其功能均較傳統靜態回算程式為佳,然在分析衝擊式試驗的撓度時,由於分析振頻量的增加,時間將隨迭代數量增加而導致其應用性受到限制。而新型撓度指標評估的建立,雖有效地增進撓度指標法之功能,提昇對鋪面各層之評估細節,但其仍屬定性的估法。為使不同分析方法結合以提昇檢測的精確性,本研究擬將撓度指標評估方式與回算分析相結合,並以介面軟體VISUAL BASIC語言開發視窗型應用軟體,供鋪面結構體分析參考。
  本研究參考中山高速公路鋪面結構所建立之模數值組合及撓度值資料庫,以撓度指標法之顯著撓度指標以及回算迭代法之修正撓度值為基準搜尋撓度資料庫,以求取最能代表現場舖面結構特性的撓度盤及基對應模數值,並以撓度之比例為修正因子同步地修正其對應模數值。以資料庫搜尋所得結果與迭代性回算程式之計算結果比較,其模數值均方根誤差均控制於10%以下。本研究所建立程式於鋪面結構強弱之初步判斷應有相當成效。
  The dynamic backcalculation of the deflections of the pavements has been verified to give better estimations than the static ones. A shortcoming of such analysis is the amount of time neede for the frequencies involved in calculation. Which puts a limit for its application in practice. The deflection indices, on the other hand, provide efficiency in evaluating the structural capacity of the pavement, yet the result is qualitative. In order to combine various evaluation procedures and to establish a windows program for such analysis, Visual-Basic computer language is used in this study.
  The standard pavement structure of the Chung-Shian Highway in Taiwan is considered in this study to construct the database of the layer moduli and corresponding deflection basins. The database is analyzed by the significant deflection indices and the modified deflections from previous studies. Once the optimized search result is in hand, a simultaneous correction based on the deflection ratio for the layer moduli is conducted. A maximum 10% RMS error of the layer inoduli is found by comparing the results from database and iterative backcalculation. It is also found that this procedure ror only can provide satisfactory result in evaluating the pavement structure but also can reduce the excessive time required in the iterative backcalcilation. The newly developed windows program is suitable to the engineering application.
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