摘要 本研究先介紹脊背橋之外型及構造,再概述其相關設計規範及分析流程,最後再以一實際案例加以說明,並將所得之結果進行討論。本研究主要利用TANGO及SAP2000進行靜力及動力分析,討論脊背橋受不同組合載重影響下,其內力及位移等變化量,再加以檢核是否符合規範要求,以確保橋梁之安全性。
Abstract This study based on introducing the feature and the structure of Extra-dosed bridges demonstrated with the design specification requirements and selection analysis, and then illustrated with a real case.The main purposes of the work aimed at the static and dynamic analyses by the package TANGO and SAP2000, then discussed the internal forces and deformations of the Extra-dosed bridges under different load combinations. And finally the data were used to comply with the specification requirements to ensure the security of the bridges.