郑州黄河公铁两用桥主桥第2联悬拼施工分析  

Analysis of Cantilever Assembling and Erection of the 2nd Unit Continuous Steel Truss Girder of Main Bridge of Zhengzhou Huanghe River Rail-cum-Road Bridge

作　　者：陈淮[1] 李杰[1] 宋洪喜[2] 李谊修[1] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]中铁大桥局集团第一工程有限公司,河南郑州450053

出　　处：《桥梁建设》2011年第6期12-15,共4页Bridge Construction

摘　　要：为了评定郑州黄河公铁两用桥主桥第2联连续钢桁梁悬拼施工方案的可行性,采用有限元软件MIDAS Civil建立该桥空间有限元计算模型。根据施工方案将钢桁梁悬臂拼装架设施工过程划分为9个施工阶段,分别对各施工阶段进行施工过程仿真分析,得到各个施工阶段对应的桥梁变形及杆件的应力。计算结果表明,郑州黄河公铁两用桥主桥第2联采用悬拼施工时,钢桁梁的变形值较小、各杆件的应力小于材料屈服强度,满足桥梁施工规范要求,结构处于安全的受力状态,该施工方案可行。To evaluate the feasibility of the construction scheme for cantilever assembling and erection of the 2nd unit continuous steel truss girder of the main bridge of Zhengzhou Huanghe River Rail-cure-Road Bridge, the software MIDAS Civil was used to build the spatial finite element calculation model for the bridge. In accordance with the construction scheme, the whole process of the cantilever assembling and erection of the truss girder was divided into 9 construction stages, the construction process simulation analysis of each construction stage was respec- tively made and the corresponding girder deformation and member stress of each construction stage were obtained. The results of the calculation indicate that in the process of the assembling and erection, the values of the deformation of the girder are little and the stress of various members is less than the yield strength of material. The deformation and stress can satisfy the relevant construction codes for the bridge, the structure is in the state of safe force conditions and the construction scheme is feasible.

关 键 词：公路铁路两用桥 连续梁 桁梁 悬臂拼装架桥 施工 有限元法 变形 应力 

分 类 号：U448.211[建筑科学—桥梁与隧道工程] U445.466[交通运输工程—道路与铁道工程]