钢-混凝土连续组合梁桥施工全过程监测及数值分析  

Monitoring and Numerical Analysis for Construction Phase of a Steel-concrete Composite Continuous Box Girder Bridge

作　　者：王景全[1] 丁峰 戴嘉平 刘其伟[3] 

机构地区：[1]东南大学教育部混凝土及预应力混凝土重点实验室,江苏南京210096 [2]润扬长江公路大桥建设指挥部,江苏镇江212028 [3]东南大学交通学院,江苏南京210096

出　　处：《公路交通科技》2006年第12期91-94,共4页Journal of Highway and Transportation Research and Development

基　　金：江苏省交通科学研究资助项目(03y031)

摘　　要：介绍1座钢-混凝土连续组合箱梁桥的设计特色及施工过程,采用先一次建立全桥有限元模型,然后利用Ansys中的生死单元技术,建立了该桥模拟施工全过程的数值分析模型。不同施工阶段的分析表明,设计采用的预应力方法可以使内支座处混凝土桥面板保持压应力状态,有效防止负弯矩区混凝土的开裂。将计算结果与不考虑体系转换情况下组合梁桥计算结果进行了比较,并对该桥成桥状态的性能作了评价。最后,指出了组合连续梁在应用中应解决的关键问题。Structure design features and constnlction procedure of a steel-concrete comiposite continuous girder bridge are introduced.A finite element model of the whole bridge was established flint followed by use of live death element under Ansys, which can simulate the structural system transforming during the construction.The result of numerical analysis illuminates that the stress of concrete bridge panel near interior supports is always compress stress during the construction.The prestressing of the bridge can avoid the cracks in concrete in the area with negative moment. By comparing the result with that of the same bridge without structural system transforming, it is demonstrated that this construction teetmique can successfully control the stress and deflection of the bridge.At last, the behavior of the bridge was evaluated and the key problems should be solved in the application of the steel-concrete composite continuous bridge were pointed out.

关 键 词：钢-混凝土组合连续梁 体系转换 监测 数值分析 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]