大跨独塔公轨两用混合梁斜拉桥实用调索方法

针对目前斜拉桥调索计算较难掌握的问题,提出了一种混合梁斜拉桥实用调索方法.以国内最宽的公轨两用混合梁斜拉桥佛山南海东平水道大桥为例,理想成桥状态索力采用经验试算法,施工阶段索力采用两阶段调索方法,悬臂拼装阶段索力满足梁重和施工荷载等要求,合龙后索力采用基于MATLAB语言编制的影响矩阵法调索程序进行调索.结果表明,最终...

Practical cable adjustment method for cable-stayed bridge with single pylon and large-span road-cum-railway hybrid girder

In order to solve the difficult problem of mastering the calculation for cable adjustment of cable-stayed bridge, a practical cable adjustment method for hybrid girder cable-stayed bridge was proposed. Through taking the Foshan Nanhai Dongping River Bridge, which is a road-cum-railway hybrid girder cable-stayed bridge with the largest width in China, as an example, the cable force at the ideally completed bridge state was calculated with an empirical trial method, and the cable force at the construction stage was calculated with the a two-stage method. At the cantilever assembling stage, the cable force met the requirements of girder gravity and construction loads. When the girder was closed, the adjustment of cable force was performed with the program based on the influential matrix method compiled with the MATLAB language. The results show that the errors between the final and ideal cable force of the completed bridge are within 1.9%. The as-proposed practical cable adjustment method has simple calculation principle, fast cable adjustment speed and high cable adjustment accuracy, and is easy to master.