本文選題：鋼管混凝土拱橋 + 靜力特性　； 參考：《廣州大學(xué)》2016年碩士論文

【摘要】：鋼管混凝土拱橋是一種新興的橋型,其具有造型美觀、承載力高、跨越能力強(qiáng)等優(yōu)點(diǎn),在我國(guó)得到廣泛發(fā)展與應(yīng)用。由于鋼管混凝土拱橋在我國(guó)建設(shè)范圍廣,并伴隨著其跨度的超越及輕質(zhì)高強(qiáng)的趨勢(shì),對(duì)拱橋的靜力特性與動(dòng)力特性的研究也成為一個(gè)重點(diǎn)課題。本文詳細(xì)介紹了拱橋分析方法及動(dòng)力學(xué)基本原理,以珠三角某一跨徑為96m雙線鐵路簡(jiǎn)支系桿拱橋?yàn)楣こ瘫尘?運(yùn)用通用有限元軟件Midas建立模型,并對(duì)該鋼管混凝土拱橋進(jìn)行靜力與動(dòng)力特性分析,主要體現(xiàn)在以下幾個(gè)方面:1.鋼管混凝土拱橋靜力性能分析:在主力組合與主力+附加力組合作用下對(duì)該橋進(jìn)行穩(wěn)定性分析,給出溫度、風(fēng)載等附加力對(duì)結(jié)構(gòu)內(nèi)力及位移的影響規(guī)律;分析在主力組合作用下,更換吊桿對(duì)結(jié)構(gòu)內(nèi)力及變形的影響,給出其變化規(guī)律。2.鋼管混凝土自振特性分析:分析了拱橋在不同位置橫撐破壞時(shí)結(jié)構(gòu)自振頻率的變化,總結(jié)出橫撐對(duì)結(jié)構(gòu)自振特性的影響規(guī)律。3.反應(yīng)譜分析:根據(jù)鐵路工程抗震設(shè)計(jì)規(guī)范擬合橋址所用地震反應(yīng)譜,分析不同方向地震輸入及組合對(duì)結(jié)構(gòu)內(nèi)力及變形的影響,并探討橫撐對(duì)抗震性能的影響。4.時(shí)程分析:采用現(xiàn)有的抗震理論對(duì)結(jié)構(gòu)進(jìn)行時(shí)程分析,輸入調(diào)整后的EL centro波Taft波和人工波,考慮三個(gè)方向輸入,對(duì)比在P1、P2概率水準(zhǔn)下的內(nèi)力與位移響應(yīng)。本文所得出的結(jié)論及相關(guān)研究成果可為同類橋梁的結(jié)構(gòu)設(shè)計(jì)及抗震性能分析提供參考。
[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.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U441;U448.22

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本文編號(hào)：1931916