斜拉桥索塔锚固区环向预应力束伸长量研究

该文针对宁波甬江特大斜拉桥主塔锚固区环向预应力束张拉时实际生产量与理论生产量之间的误差大于6%这一现象,系统地分析了影响环向预应力束伸长量的各种因素,指出了环向预应力束伸长量的构成特点。对主塔施工中实测伸长量比理论伸长量偏大这一现象给出了合理的解释。

Study on Extension of Ring Prestressed Steel Bundle in Cable Pylon Anchorage Area of Cable-stayed Bridge

Aiming at the deviation larger than 6%between the measured extension and the calculated extension when the ring prestressed steel bundle is stretched in the main pylon anchorage area of the Ningbo Yongjiang Cable-stayed Bridge,the article systematically analyzes various factors affecting the extension of the ring prestressed steel bundle,points out the composition characteristics of the ring prestressed steel bundle extension,and gives the reasonable explanation for this phenomena that the measured extension is greater than the calculated extension in the construction of the main pylon.