钢管混凝土拱桥静动力分析

发布时间：2018-05-25 03:34

本文选题：钢管混凝土拱桥 + 静力特性　；参考：《广州大学》2016年硕士论文

【摘要】：钢管混凝土拱桥是一种新兴的桥型,其具有造型美观、承载力高、跨越能力强等优点,在我国得到广泛发展与应用。由于钢管混凝土拱桥在我国建设范围广,并伴随着其跨度的超越及轻质高强的趋势,对拱桥的静力特性与动力特性的研究也成为一个重点课题。本文详细介绍了拱桥分析方法及动力学基本原理,以珠三角某一跨径为96m双线铁路简支系杆拱桥为工程背景,运用通用有限元软件Midas建立模型,并对该钢管混凝土拱桥进行静力与动力特性分析,主要体现在以下几个方面:1.钢管混凝土拱桥静力性能分析:在主力组合与主力+附加力组合作用下对该桥进行稳定性分析,给出温度、风载等附加力对结构内力及位移的影响规律;分析在主力组合作用下,更换吊杆对结构内力及变形的影响,给出其变化规律。2.钢管混凝土自振特性分析:分析了拱桥在不同位置横撑破坏时结构自振频率的变化,总结出横撑对结构自振特性的影响规律。3.反应谱分析:根据铁路工程抗震设计规范拟合桥址所用地震反应谱,分析不同方向地震输入及组合对结构内力及变形的影响,并探讨横撑对抗震性能的影响。4.时程分析:采用现有的抗震理论对结构进行时程分析,输入调整后的EL centro波Taft波和人工波,考虑三个方向输入,对比在P1、P2概率水准下的内力与位移响应。本文所得出的结论及相关研究成果可为同类桥梁的结构设计及抗震性能分析提供参考。
[Abstract]:Concrete-filled steel tubular arch bridge is a new type of bridge, which has the advantages of beautiful shape, high bearing capacity and strong span ability, and has been widely developed and applied in our country. Due to the wide construction scope of concrete-filled steel tubular arch bridge in our country and the trend of its span surpassing and light weight and high strength, the research on static and dynamic characteristics of arch bridge has become an important subject. In this paper, the analysis method and the basic dynamic principle of arch bridge are introduced in detail. Based on the engineering background of a single tied arch bridge with a span of 96m in the Pearl River Delta, the model is established by using the general finite element software Midas. The static and dynamic characteristics of the concrete filled steel tubular arch bridge are analyzed, which are mainly reflected in the following aspects: 1. 1. Static performance analysis of concrete-filled steel tubular arch bridge: the stability of the bridge is analyzed under the action of the main force combination and the main additional force, and the influence of additional forces such as temperature and wind load on the internal force and displacement of the structure is given. This paper analyzes the influence of replacing suspenders on the internal force and deformation of the structure under the action of the main force combination, and gives the law of change. 2. Analysis of natural vibration characteristics of concrete-filled steel tube: the change of natural vibration frequency of arch bridge under different position transverse brace failure is analyzed, and the influence law of transverse brace on structure natural vibration characteristic is summarized. Response spectrum analysis: according to the seismic response spectrum used in the seismic design code of railway engineering to fit the bridge site, the influence of earthquake input and combination of different directions on the internal force and deformation of the structure is analyzed, and the influence of transverse brace on seismic performance is discussed. Time history analysis: the existing seismic theory is used to analyze the time history of the structure. The adjusted El centro wave Taft wave and artificial wave are inputted and three directions input are considered to compare the internal force and displacement response under the P1P 2 probability level. The conclusions of this paper and related research results can be used as reference for structural design and seismic performance analysis of similar bridges.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U441;U448.22

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