大跨径钢桁梁悬索桥加劲梁吊装施工节段连接方式研究  

Segment Connection Mode for Stiffening Girder Hoisting Construction of Long‑Span Steel Truss Girder Suspension Bridge

作　　者：邵广淼 潘权 颜东煌 许红胜 SHAO Guangmiao;PAN Quan;YAN Donghuang;XU Hongsheng(School of Civil Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《中外公路》2024年第6期191-198,共8页Journal of China & Foreign Highway

基　　金：国家自然科学基金资助项目(编号:51878073);湖南省自然科学基金资助项目(编号:2022JJ30612)。

摘　　要：针对在大跨径钢桁梁悬索桥加劲梁施工过程中,加劲梁节段间的不同连接方式会直接影响施工过程中结构的内力、线形和成桥状态等问题。该文以某桥加劲梁施工为研究背景,建立全桥全过程有限元模型,对比分析逐段铰接法、分段刚接法的优缺点,提出采用两两分段刚接方案。在此基础上,根据加劲梁吊装过程中钢桁梁段线形和下弦杆开口量变化规律,提出“小段刚接+大段刚接”同步作业的构思,制定加劲梁节段间体系转换工序方案并实施。实桥测试结果验证了该文分析方法正确可行,在保证结构受力安全、成桥状态合理的前提下,可缩短施工工期、降低建设成本。In the process of stiffening girder construction of a long-span steel truss girder suspension bridge,different connection modes of stiffening girder segments will directly affect the internal force,alignment,and bridge state of the structure during construction.By taking the construction of the stiffening girder of a bridge as the research background,the finite element model of the whole process of the bridge was established.The advantages and disadvantages of the segmented hinge method and the segmented rigid connection method were compared,and the two-two segmented rigid connection scheme was proposed.On this basis,according to the changing law of steel truss section alignment and lower chord opening in the process of stiffening girder hoisting,the idea of synchronous operation of“rigid connection for small segments+rigid connection for large segments”was put forward.In addition,the system conversion process scheme between stiffening girders was developed and implemented.The test results of the real bridge verified the correctness and feasibility of the analysis method in this paper.On the premise of ensuring the safety of the structure and the reasonable state of the bridge,it could save the construction period and reduce the construction cost.

关 键 词：悬索桥 主梁架设 加劲梁连接方式 临时连接“ 小段刚接+大段刚接”同步作业 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]