刚架拱桥横系梁加固技术研究  

Research of Strengthening Techniques for Cross Tie Beams of a Rigid-Frame Arch Bridge

作　　者：黄德耕 罗吉智 谭洪河[2] 谢肖礼[2] 

机构地区：[1]广西壮族自治区交通规划勘察设计研究院,广西南宁530011 [2]广西大学土木建筑工程学院,广西南宁530004

出　　处：《桥梁建设》2012年第6期45-49,共5页Bridge Construction

基　　金：广西交通厅科技项目计划(2010-109-06)~~

摘　　要：钦州市钦江二桥主桥为3×63m钢筋混凝土刚架拱桥,针对该桥横系梁的病害及病因,采用附加型钢梁加固法对刚架拱桥横系梁进行加固,具体做法是,旧的横系梁不用拆除,新附加的型钢梁端部通过高强螺栓与拱肋对穿连接。对该桥加固前、后动力性能和稳定承载能力进行对比分析,结合加固后桥梁成桥试验结果,得到以下结论:所采用的计算模型和实际情况相吻合;附加型钢梁加固法能够提高桥梁的横向刚度、改善桥梁的动力性能、提高桥梁的稳定承载力,可推广应用于刚架拱桥横系梁加固。The main bridge of the Second Qinjiang River Bridge in Qinzhou City is 3 ×63m span reinforced concrete rigid-frame arch bridge. In the light of the deterioration and causes of the deterioration of the tie beams of the bridge, the tie beams were strengthened by the strengthening method of adding of the sectional steel beams. The specific ways of the strengthening were that the existing tie beams were not removed, the new sectional steel beams were added and were con- nected with the arch ribs by bolts at the ends of the beams. The dynamic properties and stability carrying capacity of the bridge before and after strengthening were compared and analyzed. In ac- cordance with the testing of the strengthened bridge, the following conclusions are drawn, i. e., the model calculation of the bridge is agreeable with the actual conditions. The strengthening of the bridge by the method as mentioned can increase the transverse rigidity of the bridge, improve the dynamic properties and stability carrying capacity and can be popularized to the strengthening of the cross tie beams of other rigid-frame arch bridges.

关 键 词：刚架拱桥 横系梁 加固技术 动力性能 稳定承载力 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]