斜拉桥索塔锚固区环形预应力束孔道摩阻试验研究

通过某公路立交桥索塔锚固区节段足尺模型试验，实测索塔锚固区内环形预应力钢束的摩阻系数、应力损失率和伸长量等数据，与设计数据进行校核、修正，并确定实际的环形预应力束张拉的摩阻系数以及初始张拉控制应力值．使环形预应力束张拉伸长值控制在合理范围。

Experiment Research on the Friction Resistance of the Ring Prestressed Steel Bundle in the Anchorage Zone of Cable-stayed Bridge Tower

Through full-scale model test of stay cable anchorage zones in pylons of a highway interchanges,many data are tested such as the coefficient of frictional resistance,bias coefficient,stress loss and extension.These data are compared with design data and then are modified. The coefficient of frictional resistance and the actual initial stress for tension control of the ring prestressed steel bundle is confirmed. At the same time,the extension of the ring prestressed steel bundle is controlled at the reasonab...