【摘要】：拱橋是一種以拱圈作為承重結(jié)構(gòu)的承載橋型，由于結(jié)構(gòu)荷載下，拱腳上水平方向推力和拱圈內(nèi)力的產(chǎn)生，令結(jié)構(gòu)跨中彎矩大大降低，而且相比于梁橋有著更為合理均勻的應(yīng)力分布，也為材料發(fā)揮強(qiáng)度提供了便利。近年來，城市橋梁景觀要求日益提高，多跨連拱橋韻律感強(qiáng)烈，造型優(yōu)美具有較強(qiáng)的景觀性，為了減輕拱上填料自重以及路線需要，鋼筋混凝土連拱橋也經(jīng)常做成帶腹拱斜置坡拱橋。由于帶腹拱斜置坡連拱橋的受力特點(diǎn)與平置連拱橋的受力有較大區(qū)別，這就給施工控制和結(jié)構(gòu)受力分析帶來了一定的難度，目前對(duì)鋼筋混凝土帶腹拱斜置坡連拱橋的研究成果較少，因此對(duì)這種新橋型進(jìn)行深入的分析研究是十分必要的。 論文從國(guó)外、國(guó)內(nèi)鋼筋混凝土拱橋的發(fā)展歷史入手，剖析歸納了鋼筋混凝土拱橋的發(fā)展歷程和施工方法，以某一座拱腳不等高設(shè)計(jì)的鋼筋混凝土三連拱拱橋?yàn)橐劳泄こ�，�?duì)其進(jìn)行成橋和施工階段仿真分析，同時(shí)，通過MIDAS/CIVIL2012分析了拱腳高差對(duì)結(jié)構(gòu)受力性能的影響。本文主要內(nèi)容及結(jié)論如下： 1、介紹了拱橋計(jì)算的彈性理論和撓度理論，并簡(jiǎn)要介紹了連拱簡(jiǎn)化計(jì)算方法，同時(shí)概述了有限元模型建立情況，對(duì)鋼筋混凝土帶腹拱斜置板式連拱橋成橋后的關(guān)鍵截面關(guān)鍵點(diǎn)的水平和豎向位移、內(nèi)部關(guān)鍵位置應(yīng)力及支座反力等進(jìn)行了分析。 2、采用橋梁有限元軟件Midas對(duì)依托工程進(jìn)行成橋和施工階段仿真分析，研究發(fā)現(xiàn)依托工程結(jié)構(gòu)受力合理，但是主拱圈拱腳位置部分出現(xiàn)較大拉應(yīng)力，建議嚴(yán)格按照施工方案施工并加強(qiáng)監(jiān)控、及時(shí)反饋。 3、進(jìn)行現(xiàn)場(chǎng)施工監(jiān)控，，對(duì)關(guān)鍵截面的應(yīng)力和撓度進(jìn)行測(cè)量并與有限元數(shù)據(jù)進(jìn)行對(duì)比，研究發(fā)現(xiàn)采用有限元對(duì)鋼筋混凝土帶腹拱斜置坡連拱橋進(jìn)行成橋分析和施工階段分析與實(shí)測(cè)情況基本一致，數(shù)據(jù)可靠。 4、采用有限元軟件，選取三組拱腳高差參數(shù)對(duì)依托工程分別進(jìn)行內(nèi)力、位移和拱座反力對(duì)比分析，研究發(fā)現(xiàn)拱腳高差對(duì)拱肋前后2個(gè)半拱內(nèi)力的影響幾乎成反對(duì)稱變化，主腹拱連接處應(yīng)特別關(guān)注，拱腳高差越大對(duì)右拱座處結(jié)構(gòu)位移越不利，拱座水平支反力受拱腳高差影響較小。
[Abstract]:Arch bridge is a kind of bearing bridge type with arch ring as load-bearing structure. Due to the horizontal thrust on arch foot and the internal force of arch ring under structural load, the moment in the middle of span of the structure is greatly reduced. Compared with the beam bridge, the stress distribution is more reasonable and uniform, and it also provides convenience for the material to exert its strength. In recent years, the demand of urban bridge landscape is increasing, the rhythm feeling of multi-span multi-arch bridge is strong, the shape of multi-span arch bridge has strong landscape quality, in order to reduce the weight of the packing on the arch and the need of the route, Reinforced concrete arch bridge is also often made with belly arch inclined slope arch bridge. Because the stress characteristics of inclined slope multi-arch bridge with belly arch are different from that of flat arch bridge, it brings some difficulties to construction control and structural stress analysis. At present, the research results of reinforced concrete inclined slope arch bridge with web arch are few, so it is very necessary to deeply analyze and study the new type of bridge. Starting with the development history of reinforced concrete arch bridge abroad and in China, this paper analyzes and sums up the development course and construction method of reinforced concrete arch bridge, which is based on a reinforced concrete three-arch bridge with different design height of arch foot. At the same time, the influence of the arch foot height difference on the mechanical performance of the structure is analyzed by MIDAS/CIVIL2012. The main contents and conclusions of this paper are as follows: 1. The elastic theory and deflection theory of arch bridge calculation are introduced, and the simplified calculation method of multi-arch is briefly introduced, and the establishment of finite element model is summarized. The horizontal and vertical displacement of the key points of the key cross-section, the stress at the key position and the reaction force of the support of the reinforced concrete inclined slab multi-arch bridge with web arch after the completion of the bridge are analyzed in this paper. 2, the bridge finite element software Midas is used to simulate and analyze the bridge and construction stage of the supporting project. It is found that the supporting engineering structure is under reasonable stress, but the main arch ring arch foot is partially subjected to large tensile stress. Suggestion strictly according to the construction plan construction and strengthen the monitoring, timely feedback. The stress and deflection of the key section are measured and compared with the finite element data. It is found that the finite element analysis of reinforced concrete inclined slope arch bridge with web arch is in good agreement with the measured results and the data are reliable. 4. By using finite element software, three groups of parameters of height difference of arch foot are selected to carry out comparative analysis of internal force, displacement and reaction force of arch seat respectively. It is found that the influence of height difference of arch foot on internal force of two half arches before and after arch rib is almost antisymmetric. The greater the height difference of arch foot is, the more disadvantageous is the displacement of the right arch seat, and the reaction force of horizontal support of arch seat is less affected by the arch foot height difference.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U441;U448.22

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 黃澤權(quán);梅蓋偉;楊興;;拱橋有支架施工加載程序優(yōu)化設(shè)計(jì)[J];重慶交通大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年01期

2 陳寶健,許有勝,陳寶春;日本鋼筋混凝土拱橋調(diào)查與分析[J];中外公路;2005年04期

3 陳寶春;葉琳;;我國(guó)混凝土拱橋現(xiàn)狀調(diào)查與發(fā)展方向分析[J];中外公路;2008年02期

4 韋建剛;陳寶春;;國(guó)外大跨度混凝土拱橋的應(yīng)用與研究進(jìn)展[J];世界橋梁;2009年02期

5 張昌林;;坡拱橋的計(jì)算問題[J];公路;1988年03期

6 趙付安;;大跨鋼筋混凝土拱橋主拱圈有支架施工技術(shù)[J];山西建筑;2008年14期

7 徐立功;;剛架拱橋塔架纜索吊裝法[J];科學(xué)之友(B版);2008年07期

8 張健峰;鐘啟賓;;橋梁水平轉(zhuǎn)體法施工的成就及發(fā)展[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);1992年06期

9 王成;;鋼管混凝土柔性系桿拱橋轉(zhuǎn)體法施工技術(shù)[J];鐵道標(biāo)準(zhǔn)設(shè)計(jì);2006年04期

10 林同炎;拱是結(jié)構(gòu)也是建筑[J];土木工程學(xué)報(bào);1997年03期

本文編號(hào)：2333750