摘要
结合南淝河大桥钢箱梁节段桥位施工,大桥钢箱梁为全焊接结构,箱梁断面宽度较大,采用钢材厚度较薄。另外,桥位箱梁的环缝焊接为野外作业环境,给环形焊接收缩、变形和质量控制带来难度。钢箱梁是南淝河大桥上部的承重钢结构,环缝焊接的质量决定桥梁的安全性。为了保证桥梁的整体安全,控制焊接变形,对钢箱梁焊接和焊接变形控制进行深入分析,制定符合实际焊接要求的工艺流程,采取减少焊接变形程度和收缩量的焊接措施。在钢箱梁环缝焊接的过程中,通过控制人员、机器、材料和环境节间的关系,保证箱梁环缝焊接质量。依据钢箱梁有限元模型,对环缝焊接变形进行预测。同时,对焊接顺序优化结果进行仿真分析,综合、全面评价优化结果,使箱梁焊接顺序更合理。
The steel box girder of the bridge is fully welded, and the section width of the box girder is larger and the steel thickness is thinner. In addition, the circular seam welding of the bridge box girder is a field work environment, which makes it difficult to weld shrinkage, deformation and quality control. The steel box girder is the load-bearing steel structure on the upper part of the south feihe bridge, and the quality of circular seam welding determines the safety of the bridge. In order to ensure the overall safety of the bridge, the control of welding deformation, in-depth analysis was carried out on the steel box girder welding and welding deformation control, formulated to meet the requirements of the actual welding process, to reduce the shrinkage of welding and welding deformation of the measures. In the process of welding of steel box girder, the quality of girder joint is guaranteed by controlling the relation between the personnel, machine, material and environment. On the basis of finite element model of steel box girder, forecast girth welding deformation, the research on the girth welding deformation, the influence of welding sequence and by using the MATLAB software under different welding sequence analysis and evaluation on the flatness of the steel box girder roof.
作者
吉海军
霍晓琴
Ji Haijun, Huo Xiaoqin(Xi＇An Vocational and Technical College, Xi＇an Shanxi, 710077)
出处
《粉煤灰综合利用》
CAS
2018年第5期133-136,共4页
Fly Ash Comprehensive Utilization
基金
西安职业技术学院教改项目<"行动导向"教学法在<建筑施工技术>课程教学中的应用研究与实践>
项目编号:2017JY11
关键词
建筑钢箱
梁节段
接口环缝焊
变形预测
construction steel box
Beam segment
Interface seam welding
Deformation prediction
