高原冻雨山区悬索桥主缆和钢箱梁线形及内力研究

发布时间：2018-04-24 03:13

本文选题：悬索桥 + 冻雨　；参考：《长安大学》2015年硕士论文

【摘要】：钢箱梁悬索桥不仅桥型美观、很大的跨越能力、结构形式简单,而且结构的受力及其经济性能良好,所以是当今社会大跨径桥梁结构主要形式之一。随着社会的进步,科技的快速发展,在跨江和跨大峡谷中,大跨径桥梁越来越多,需要更好的施工技术来完成。所以对高原冻雨山区大跨径悬索桥主缆和钢箱梁线形及内力研究具有相当重要的应用价值。本文以刚刚建成的一座钢箱梁悬索桥为依托工程,对理论计算和主缆及钢箱梁状态进行研究。首先:介绍了悬索桥的国内外发展史,研究高原冻雨山区悬索桥结构变形和受力特点的意义。针对特殊气候环境下悬索桥研究的主要内容。谈论悬索桥主缆线形的理论计算方法。以普立特大桥为依托工程,采用有限元方法,建立有限元计算模型,计算施工过程中,悬索桥所需的理论参数,对现场大桥的施工提供参考性的建议。其次:分析悬索桥五大组成构件,在制造及施工过程中,可能存在的误差及其来源,对误差进行定量分析。以悬索桥主缆空缆线形及其索力、成桥主缆线形及其索力和成桥钢箱梁线形及其内力为控制目标,对可能存在的误差参数进行敏感性分析,研究控制目标的变化规律及其幅值,对进一步施工控制突破侧重点,使施工质量达到设计状态。最后:针对高原冻雨山区的环境下,研究桥梁结构成桥状态的变化规律。采集桥位处实际的温度和结构的日照温差,分析其变化规律,采用有限元程序建立悬索桥结构模型,并且模拟现场的实测整体温度变化,用温度梯度模拟桥梁的结构日照温差,进而研究悬索桥成桥主缆和钢箱梁的线形及其内力变化规律。冰冻荷载采用低温环境和冻雨的静力荷载进行组合,进行悬索桥状态的研究。为今后业内人士对高原冻雨山区同类型桥梁的设计及施工提供参考性的建议。
[Abstract]:Steel box girder suspension bridge is not only a beautiful bridge with great span ability, simple structure form, but also a good force and economic performance of the structure, so it is one of the main forms of long span bridge structure in the society today. With the progress of society and the rapid development of science and technology, there are more and more long-span bridges across rivers and canyons. Therefore, the research on the main cable and steel box girder of the long span suspension bridge in the highland frozen rain mountain area has important application value. Based on the newly built steel box girder suspension bridge, the theoretical calculation and the state of the main cable and the steel box girder are studied in this paper. Firstly, the development history of suspension bridge at home and abroad is introduced, and the significance of structural deformation and stress characteristics of suspension bridge in highland frozen rain mountain area is studied. The main contents of the research on suspension bridge under special climate environment are discussed. This paper discusses the theoretical calculation method of the main cable shape of the suspension bridge. Based on the project of Puli Bridge, the finite element calculation model is established by using finite element method, and the theoretical parameters of suspension bridge are calculated in the course of construction, which provides some suggestions for the construction of local bridge. Secondly, the possible errors and their sources in the manufacture and construction of the five components of the suspension bridge are analyzed, and the errors are quantitatively analyzed. Taking the main cable of suspension bridge and its cable force, the main cable form of the bridge and its cable force and the steel box girder of the bridge and its internal force as the control objectives, the sensitivity of the possible error parameters is analyzed, and the variation law and amplitude of the control target are studied. For further construction control break through the focus, so that the construction quality to design state. Finally, the changing law of bridge structure is studied under the environment of plateau frozen rain mountain area. The actual temperature at the bridge location and the sunshine temperature difference of the structure are collected and analyzed. The structural model of the suspension bridge is established by using finite element program, and the global temperature change of the field is simulated. The temperature gradient is used to simulate the temperature difference of the structure of the bridge. Then the linear shape and internal force of the main cable and steel box girder of suspension bridge are studied. The frozen load is combined with the static load of freezing rain to study the state of suspension bridge. It provides reference suggestions for the design and construction of the same type bridges in highland frozen rain mountain areas in the future.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.25

【参考文献】