移动模架造桥机结构安全性研究

发布时间：2018-01-13 11:07

本文关键词：移动模架造桥机结构安全性研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：移动模架系统也称造桥机，是一种自带模板，利用承台或墩柱作为支承，对桥梁进行现场浇筑的施工机械。移动模架系统结构复杂、形式多样，特别是随着施工跨度和宽度的增大，其结构强度、刚度及稳定性的设计和控制较为复杂。现浇混凝土箱梁线形影响因素比较多，其中移动模架系统主梁产生的挠度对线形的影响最为显著。因此移动模架系统的有限元仿真计算，对保证施工的安全性和现浇混凝土箱梁的线形都具有很好的使用价值。本文以某公司生产的MSS50移动模架系统为研究对象，，利用大型有限元分析软件ANSYS，结合实际工况建立其有限元模型，对施工过程中移动模架系统的浇筑和过孔工况进行有限元仿真。利用ANSYS软件对移动模架系统浇筑工况下的主梁、牛腿结构进行强度、刚度、稳定性分析，计算出各浇筑工况下主梁产生的挠度。另外对移动模架系统过孔时的抗倾覆稳定性进行计算，分析过孔工况下主梁、鼻梁、牛腿结构的强度、刚度以及稳定性。通过有限元的分析计算，来验算移动模架系统施工中的结构安全性，同时为控制现浇混凝土箱梁的线形提供数据。
[Abstract]:Mobile mould frame system, also called bridge maker, is a kind of construction machinery with its own formwork, which uses the cap or pier column as the support to build the bridge on the spot. The mobile mould frame system has complex structure and various forms. Especially, with the increase of construction span and width, the design and control of structural strength, stiffness and stability are more complicated. There are many factors affecting the alignment of cast-in-place concrete box girder. The deflection produced by the main beam of the moving die frame system has the most significant effect on the alignment, so the finite element simulation calculation of the mobile die frame system is carried out. It has good use value to ensure the safety of construction and the line shape of cast-in-place concrete box girder. In this paper, the MSS50 mobile mold frame system produced by a company is taken as the research object, and the finite element model is established by using the large-scale finite element analysis software ANSYSand combining with the actual working conditions. The finite element simulation is carried out on the construction process of the moving die frame system. The strength and stiffness of the main beam and the corbel structure under the construction condition are carried out by using ANSYS software. Stability analysis, calculation of the deflection of the main beam under various pouring conditions. In addition, the anti-overturning stability of the moving die frame system is calculated, and the strength of the main beam, nose beam and corbel structure under the over-hole condition is analyzed. Stiffness and stability. By finite element analysis and calculation, the structural safety in the construction of moving mould frame system is checked and the data are provided for the control of the line shape of cast-in-place concrete box girder.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.3

【参考文献】