- 摘 要
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（1 東南大學土木工程學院 南京 210096； 2 南京工業(yè)大學加固與鑒定中心 210009）
【提要】 應(yīng)用體內(nèi)外同索預(yù)應(yīng)力結(jié)構(gòu)解決了在加固與改造工程中抽柱擴跨問題。該結(jié)構(gòu)體系考慮了抽柱擴跨加固與改造時對鄰近跨的影響，將部分體內(nèi)預(yù)應(yīng)力筋延伸至體外加固原有梁，解決預(yù)應(yīng)力筋在端頭錨固集中問題的同時也減少了植筋的數(shù)量，用交叉布束的方式代替平行布束，避免使用復(fù)雜的轉(zhuǎn)向塊裝置。通過實例說明了該加固法的計算步驟和方法。
【關(guān)鍵詞】 體內(nèi)外同索 抽柱擴跨 加固
Strengthen Design for Cutting Column and Extending Span by Using the Prestressed Structure with Same Tendon Located Internally and Externally/Yuan Aimin1,Li Yanhe2,Wu Yuan1(1 Civil Engineering College,Southeast University，Nanjing 210096，China; 2 Center of Strengthen and Appraiser,Nanjing University of Technology，Nanjing 210009，China)
Abstract:The novel prestressed structure with the same tendon whose one part of it is ext
ernal and the other part of it is internal,is used to cut column and extend span in the strengthen and retrofitted engineering.The effect on vicinity span caused by cutting column and extending span is considered.The present method is not only resolved the a
nchorage problem of prestressing tendon at the end of beam but also cut down the quantity of adhesively bonded bar,and it is pointed out that the arrangement of prestressing tendon with cross instead of parallel can avoid using complicated turnaround device.It demonstrates the design process of caculation method by an engineering,and discusses the existing problem and further research subjects.
Keywords:internal;external tendon;cutting column;extending span;retrofitted
