空心板梁桥增强横向联系加固方法研究

Study on Reinforcement Method of Horizontal Connection for the Hollow Plate Girder Bridge

空心板梁桥受力明确、设计方法成熟、施工快捷,在中、小跨径桥梁中所占比例较大。运营期间,空心板梁桥往往出现横向联系削弱、单板受力过大典型病害。横向联系减弱,个别空心板荷载效应会显著提高,进而产生或加剧结构性病害,甚至威胁结构安全。为此,针对较为突出的横向联系削弱、单板受力过大病害,归纳总结了粘贴钢板、张拉横向预应力、板端增设支撑和改变结构形式等有效加固方法。介绍了各加固方法的工作原理,对比分析各方法的适用情况,阐述了决定加固效果的施工注意事项。提出的方法均可以不阻碍交通正常运行,安全可靠,经济效益显著,对桥梁养护工作具有借鉴意义。

The hollow plate girder bridgeaccounts for a large proportion of medium and small span bridge because it hasclear structure,simple designing method and can be built quickly.During the operation period,the hollow plate girderbridge often has the typical disease of the weakening of the horizontal connection which causes the overbearing of the single plate.The horizontal connection between the hollow plates has a great influence on the structural mechanical performance.It will cause structural diseases and even threaten structural security.To this end,the effective reinforcement methods such as pasting steel plate,tensiling horizontal pretension,adding support at the end of the plate and changing the structure form are summarized in this paper.This paper also introduces the working principle of each reinforcement method and analyzes the application of each method and the attentions which determining the reinforcement effect.These methods have reference significance for bridge maintenance work because they can be used without traffic congestion and have significant economic benefits.