42m铁路上承式钢桁梁横振超标整治方案研究

Study on lateral stiffness strengthening for 42m deck steel truss girder bridge

结合济南铁路局42m上承式钢桁梁加固的工程实例,采用大型有限元分析软件ANSYS和自编软件BDAP,建立空间计算模型进行车桥耦合振动分析,并对各个加固方案进行比较分析和优化,提出在不增加或改变主桁的配置情况下,加强联结系是有效可行方案。

The engineering design case about reinforce for 42 m deck steel truss girder bridge on Ji＇nan railway bureau investigated in this paper. By the geat FEM analysis software ANSYS and BDAP（ Bridge Dynamic Analysis Program） ,both the vehicle and the bridge was analyzed with a coupled finite element model to calculate the response of them. It puts forward that strengthen base on bracing system without changing main truss is effective and practical method.