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     徐金聲  薛立紅
    （中國(guó)建筑科學(xué)研究院 北京 100013）

[提要]  分析了無(wú)粘結(jié)預(yù)應(yīng)力筋端頭錨固區(qū)的受力特征，指出對(duì)端頭錨固區(qū)的局部承壓強(qiáng)度應(yīng)作施工張拉和承載能力極限狀態(tài)兩個(gè)階段的計(jì)算，提出了端部構(gòu)造處理建議，還給出了工程實(shí)例。
[關(guān)鍵詞]  無(wú)粘結(jié)預(yù)應(yīng)力混凝土 端部構(gòu)造 局部承壓強(qiáng)度

The characteristic of forces acting in the end block anchorage of unbonded prestressed tendons is analysed. Author suggested that the calculation of end block of bearing strength should be taken with
two steps: prestressing stage and ultimite limit states. In addition, the constructional details of end block and engineering examples are presented.
Keywords:  unbonded prestressed concrete; constructional details of end block; bearing strength.