長跨徑懸臂工法橋梁，由於具有結構上跨徑長之特性，可分階段施工、且施工上之自動化效率，較不受地形障礙影響等之優點，使得此工法在國內橋梁建造之應用，日漸廣泛。
但長跨徑懸臂工法橋梁於建造階段，卻因為混凝土結構隨節塊延伸而使混凝土之彈性模數、乾縮、潛變量、預力鋼腱之鬆弛量及所受之荷重等條件隨時間逐漸變化，而使橋梁變位量之預測更加困難，也使因應此變位量而預留之預拱值的準確性更難掌握。
本文以ABI橋樑結構分析程式為工具，就東西向快速道路高雄-潮州線E812標B204及B208等二單元，搭配在國外較受廣泛使用之ACI、CEB-FIP、及B3等三混凝土變形預測模式，計算於施工之實際變位量與以三預測模式計算出之預測值作比較，歸納出在此實際案例中，較符實際情形之預測模式，以作為日後長跨徑懸臂工法橋樑施工者於變位量控制之參考。
經歸納研究後得到，ACI、CEF-FIP及B3等三模式於本研究中均有相當接近之預測值，但CEB-FIP模式隨懸臂伸長量之增加，與另二模式比較，具有較小之差異值，就本研究而言，則更具適應性。

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