徐金声  薛立红
    （中国建筑科学研究院 北京 100013）

[提要]  分析了无粘结预应力筋端头锚固区的受力特征，指出对端头锚固区的局部承压强度应作施工张拉和承载能力极限状态两个阶段的计算，提出了端部构造处理建议，还给出了工程实例。
[关键词]  无粘结预应力混凝土 端部构造 局部承压强度

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.