超长轻薄巨型钢管桁架梁施工关键技术研究

发布时间：2018-06-05 23:08

本文选题：钢结构 + 整体提升　；参考：《北京工业大学》2013年硕士论文

【摘要】：随着我国经济和社会的发展，钢结构被越来越多的结构设计师应用于民用建筑领域。特别是2008年奥运会后，国家加大了对高速铁路、机场等基础设施的投资，催生了一大批高铁、地铁和公交立体交叉的现代化大跨度钢结构铁路站房。本文以厦门北站钢结构屋盖施工为工程背景，提出了超长轻薄巨型管桁架梁的整体提升方案，对提升过程中关键构件的应力、变形和稳定性进行了理论分析，对提升过程进行了数值模拟和施工监控，主要工作和成果如下：（1）提出了超长轻薄巨型管桁架梁的场外小拼、场内整拼、利用液压千斤顶整体提升的施工方案，并阐述了巨型钢桁架提升方案的关键环节；（2）对超长轻薄巨型管桁架梁提升过程中关键构件的应力、变形和稳定性进行了理论分析，验算了桁架两端劲性柱在正常提升和非正常提升情况下的应力和变形情况，导向架在起提、提升过程中以及就位三种工况下的侧向稳定性，桁架自身构件在正常提升过程中的受力和变形情况，以及牛腿在正常提升和一侧偏心两种工况下的构件稳定性、应力及变形情况；（3）采用有限元软件对整个屋盖施工过程进行了数值模拟分析，并根据分析结果制定了提升过程监测方案，，进而对提升施工全过程进行监测。监测结果表明，施工全过程构件的应力和变形与理论计算值基本吻合，结构处于低应力状态，施工过程未影响结构的安全性，但构件的实际受力状态与不考虑施工过程影响的设计受力状态有所不同。本文研究工作和成果为国内类似结构的设计和施工，提供了基础数据和经验，具有较大的参考价值。
[Abstract]:With the development of economy and society in our country, steel structure has been applied to the field of civil architecture by more and more structural designers. Especially after the 2008 Olympic Games, the state has increased the investment in high-speed railway, airport and other infrastructure, which has given birth to a large number of high-speed rail, subway and bus interchange of modern large-span steel railway stations. Taking the steel roof construction of Xiamen North Railway Station as the engineering background, this paper puts forward the integral lifting scheme of super long, light and thin giant tubular truss beam. The stress, deformation and stability of the key members in the process of lifting are analyzed theoretically. Numerical simulation and construction monitoring are carried out on the lifting process. The main work and results are as follows: The paper puts forward the construction scheme of extra-long, light and thin mega tube truss beam outside the field, uniting in the field, using hydraulic Jack to lift the whole, and expounds the key link of the lifting scheme of giant steel truss. In this paper, the stress, deformation and stability of the key members in the lifting process of super long, light and thin giant tubular truss beams are theoretically analyzed, and the stress and deformation of the stiffened columns at both ends of the truss under normal and abnormal lifting conditions are checked and calculated. The lateral stability of the guide frame during lifting, lifting and in place, the stress and deformation of the truss members during normal lifting, and the stability of the corbel under the normal lifting and eccentric conditions. Stress and deformation; 3) the finite element software is used to simulate and analyze the whole roof construction process, and according to the analysis results, the monitoring scheme of the hoisting process is worked out, and then the whole process of hoisting construction is monitored. The monitoring results show that the stress and deformation of the components in the whole construction process are basically consistent with the calculated values, the structure is in a low stress state, and the construction process does not affect the safety of the structure. But the actual stress state of the component is different from the design stress state which does not consider the influence of the construction process. The work and results of this paper provide basic data and experience for the design and construction of similar structures in China, which is of great reference value.
【学位授予单位】：北京工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU758.11

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