后张施工工艺的若干施工与设计问题

Several construction and design problems in post-tensioning processes

介绍了后张法预应力的施工工艺、张拉预应力值的建立与预应力摩阻损失的计算方法 ,以及在现阶段的若干施工与设计上常见的问题 ,以多束钢绞线预应力筋为例分析了预应力张拉施工的摩擦损失问题 ,指出了分批次张拉工艺在一定情况下 。

The post_tensioning construction processes, the foundation of the prestressing value and the calculation method of prestressing frictional loss are described. And some problems in current constructing and designing processes are discussed too. The problem of prestressing frictional loss based on an example of tensioning groups of strands in batches is analyzed. Finally, it is pointed out that the tensioning process in batches has a practicable prospect to solve the problem of incompetency of tensioning equipments in some cases.