乌江大桥病害成因分析及加固设计

Analysis of Disease Causes of Wujiang Bridge and Reinforcement Design

针对斜拉-悬吊协作体系桥出现的加劲梁平面线形畸变、主梁箱室内顶板开裂渗水等病害,进行加固技术研究。在多年实践积累的大跨径柔性悬吊结构体系桥梁加固经验的基础上,提出在保持桥梁恒载不变的情况下,尽量增大结构刚度,从而提高桥梁整体结构的动力特性。

Aimed at the diseases emerging on cable-stayed-suspension collaborative bridge such as linear dis- tortion on stiffening girder and seepage of the roof of main girder, the research of reinforcement technology was conducted. Based on years of experience in reinforcement of large-span bridge with flexible suspension struc- ture, a reinforcement plan was proposed suggesting to increase the structural stiffness while maintaining the dead load of bridge, so as to improve the dynamic characteristics of overall structure of the bridge.