不同结构体系下的高低塔斜拉桥地震响应分析研究

发布时间：2018-05-15 05:35

本文选题：高低塔斜拉桥 + 反应谱　；参考：《西南交通大学》2015年硕士论文

【摘要】：随着我国改革开放的进一步深化,我国的经济建设也得到了长足的发展,基础设施的建设也正如火如荼地开展。建立起四通八达的现代交通网络,不仅对我国的经济建设具有明显的促进作用,更是在促进不同民族、不同地域间的文化交流、巩固国防等方面发挥着重要作用。桥梁,正是交通工程中的咽喉。桥梁作为附着在地球表层的构筑物,会因为地震而遭到巨大的破坏。我国是一个地震频发的国家,地震给我国带来的经济损失不容小觑。斜拉桥作为一种跨越能力强的构筑物,在地震过程中发挥其优越抗震性能的时候,不仅是确保不发生巨大经济损失的需要,更是在地震抢险过程中保证生命线畅通的需要。本文在查阅相关文献资料的基础上,以四川泸州的黄舣大桥作为工程背景,对高低塔斜拉桥的地震响应进行了一下几个方面的研究：1、先对弹性静力法、反应谱法、动态时程分析法、功率谱法等抗震分析理论方法进行了一个大概阐述分析,总结一下这些方法的特点；2、利用桥梁软件MIDAS/Civil对黄舣大桥进行有限元模拟,分析了此类桥型的动力特性；3、通过不同的地震输入方式及空间组合,采用反应谱法对黄舣大桥进行地震反应分析；4、采用动态时程分析法分别对漂浮体系、半漂浮体系和钢构体系下的大桥模型进行地震响应分析并对比其中的差异,探讨不同地震激励方式对结构地震响应的影响,得到一些有益的结论；5、对比分析不同参数设置下的粘滞阻尼对桥梁抗震性能的影响；6、综合反应谱和动态时程分析计算结果,对不同结构体系下的高低塔斜拉桥的地震响应特点进行总结。
[Abstract]:With the further deepening of China's reform and opening up, China's economic construction has also been greatly developed, infrastructure construction is also in full swing. The establishment of modern traffic network in all directions plays an important role not only in promoting the economic construction of our country, but also in promoting the cultural exchange among different nationalities and regions, consolidating national defense, and so on. Bridge is the throat of traffic engineering. Bridges, as structures attached to the surface of the earth, are severely damaged by earthquakes. China is a country with frequent earthquakes, and the economic losses caused by earthquakes should not be underestimated. As a kind of structure with strong span ability, cable-stayed bridge is not only the need to ensure that there is no huge economic loss, but also the need to ensure the smooth flow of lifeline in the course of earthquake rescue. On the basis of consulting relevant documents and taking Huangyue Bridge in Luzhou, Sichuan Province as the engineering background, this paper studies the seismic response of high and low tower cable-stayed bridges in several aspects: 1. First, the elastic static method and the response spectrum method are studied. The dynamic time history analysis method, power spectrum method and other seismic analysis theory methods are discussed in this paper. The characteristics of these methods are summarized. The bridge software MIDAS/Civil is used to simulate the Huangyue Bridge by finite element method. The dynamic characteristics of this kind of bridge are analyzed in this paper. Through different seismic input modes and spatial combinations, the seismic response analysis of Huangyue Bridge is carried out by using response spectrum method, and the floating system is analyzed by dynamic time history analysis method, respectively. The seismic response of the bridge model under semi-floating system and steel structure system is analyzed and compared, and the influence of different seismic excitation modes on the seismic response of the structure is discussed. Some useful conclusions are obtained. The effects of viscous damping under different parameters on the seismic performance of the bridge are compared and analyzed. The comprehensive response spectrum and dynamic time-history analysis results are analyzed. The seismic response characteristics of high and low tower cable-stayed bridges with different structures are summarized.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U442.55;U448.27

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