【摘要】：在現(xiàn)代科技的迅速發(fā)展的帶動(dòng)下,橋梁技術(shù)也有了突飛猛進(jìn)的變化,各種各樣的橋型不斷的涌現(xiàn)。作為近幾十年來(lái)的技術(shù)發(fā)展所產(chǎn)生的橋型,矮塔斜拉橋由于其結(jié)構(gòu)上的特性,得到了快速的推廣。為了確保結(jié)構(gòu)在施工過(guò)程中的不會(huì)出現(xiàn)安全事故,并且結(jié)構(gòu)的變形與位移處于可以控制的狀態(tài),對(duì)大跨徑橋梁施工控制是非常有必要的。為了保證結(jié)構(gòu)最終的線性與設(shè)計(jì)狀態(tài)能夠較好的吻合,對(duì)結(jié)構(gòu)進(jìn)行準(zhǔn)確的施工控制是非常重要的。本文以瑞麗江大橋?yàn)檠芯繉?duì)象,對(duì)矮塔斜拉橋施工控制的關(guān)鍵技術(shù)進(jìn)行了有針對(duì)性的研究。主要內(nèi)容如下:①介紹了矮塔斜拉橋的特點(diǎn),國(guó)內(nèi)外矮塔斜拉橋發(fā)展的現(xiàn)狀以及未來(lái)的發(fā)展趨勢(shì),以及橋梁施工控制技術(shù)的發(fā)展?fàn)顩r。②介紹了施工控制的內(nèi)容與基本原理以及方法,并提出了可能會(huì)影響到施工控制效果的因素。③運(yùn)用結(jié)構(gòu)分析軟件Midas Civil 2012對(duì)結(jié)構(gòu)建立了有限元分析模型,并分析了結(jié)構(gòu)的具體施工過(guò)程中的受力以及變形,計(jì)算出橋梁的關(guān)鍵截面如懸臂根部、二分之一懸臂位置以及成橋狀態(tài)主梁上下緣應(yīng)力值以及成橋后的豎向位移值,根據(jù)分析所得到的理論計(jì)算值,給出了各施工節(jié)段所需要設(shè)置的預(yù)拱度的值。④結(jié)合瑞麗江特大橋,分析了結(jié)構(gòu)對(duì)梁段自重的變化、斜拉索初張索力值變化以及預(yù)應(yīng)力鋼絞線的張拉控制力值這幾個(gè)參數(shù)發(fā)生變化后結(jié)構(gòu)響應(yīng)。⑤根據(jù)有限元模型的理論計(jì)算,對(duì)結(jié)構(gòu)進(jìn)行了相應(yīng)的施工控制,在現(xiàn)場(chǎng)對(duì)需要控制的值進(jìn)行了實(shí)測(cè),并將實(shí)測(cè)的結(jié)果按照一定的方式進(jìn)行了處理,將處理后的值與理論計(jì)算值進(jìn)行了比較,根據(jù)比對(duì)結(jié)果,得出了對(duì)結(jié)構(gòu)的控制的效果的結(jié)論。并使用了二分法進(jìn)行參數(shù)識(shí)別,驗(yàn)證了其具有一定的可行性。
[Abstract]:Driven by the rapid development of modern science and technology, bridge technology has also undergone rapid changes, various bridge types continue to emerge. As a bridge type produced by the development of technology in recent decades, the low tower cable-stayed bridge has been rapidly popularized because of its structural characteristics. In order to ensure that the safety accident will not occur in the construction process and the deformation and displacement of the structure are in a controllable state, it is very necessary for the construction control of the long-span bridge. In order to ensure that the final linear and design state of the structure can be well consistent, it is very important to carry out accurate construction control of the structure. Taking the Ruilijiang Bridge as the research object, the key technology of construction control of the cable-stayed bridge with low tower is studied in this paper. The main contents are as follows: 1 the characteristics of the cable-stayed bridge with low tower, the present situation of the development of the cable-stayed bridge at home and abroad and the development trend of the cable-stayed bridge in the future are introduced. And the development of bridge construction control technology. 2. The contents, basic principles and methods of construction control are introduced. The factors that may affect the construction control effect are put forward. 3 the finite element analysis model of the structure is established by using the structure analysis software Midas Civil 2012, and the stress and deformation of the structure during the construction process are analyzed. The key sections of the bridge, such as the cantilever root, the 1/2 cantilever position and the stress value of the upper and lower edge of the main beam in the state of the bridge, as well as the vertical displacement value after the completion of the bridge are calculated, and the calculated values are calculated according to the theoretical results obtained from the analysis. The values of pre-arches required for each construction section are given. 4 combined with the Ruilijiang Bridge, the variation of the structure to the dead weight of the beam section is analyzed. After the change of the initial tension force of the cable and the tension control force of the prestressed steel strand, the structural response is obtained. 5 according to the theoretical calculation of the finite element model, the corresponding construction control of the structure is carried out. The values needed to be controlled are measured in the field, and the measured results are treated in a certain way. The treated values are compared with the theoretical calculated values. According to the comparison results, the effect of the structure control is obtained. The method of dichotomy is used to identify the parameters, and the feasibility of the method is verified.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.4;U448.27

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本文編號(hào)：2296850