无粘结预应力混凝土端部构造及局部承压强度的计算

The Construction and Calculation of Bearing Strength in End Block of Unbonded Prestressed Concrete

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.

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.