【摘要】：隨著我國(guó)社會(huì)經(jīng)濟(jì)的快速發(fā)展,橋梁建設(shè)的規(guī)模變得越來越大,大跨度以及結(jié)構(gòu)復(fù)雜的橋梁正在被越來越多地規(guī)劃和建造著,其中大跨度外傾非對(duì)稱式系桿拱橋,結(jié)構(gòu)新穎、外形優(yōu)美,已被廣泛地應(yīng)用于城市景觀橋梁中。大型復(fù)雜橋梁的整個(gè)施工過程中結(jié)構(gòu)體系轉(zhuǎn)換較多,為了實(shí)現(xiàn)橋梁成橋狀態(tài)下結(jié)構(gòu)的線形狀態(tài)和應(yīng)力狀態(tài)逼近理想的成橋狀態(tài),需要對(duì)整個(gè)橋梁建設(shè)過程制定科學(xué)合理的施工監(jiān)控體系。大跨度外傾非對(duì)稱式系桿拱橋,結(jié)構(gòu)復(fù)雜,施工步驟繁多,其合理的內(nèi)力狀態(tài)與理想的線形狀態(tài)不但與設(shè)計(jì)有關(guān),而且還要依靠科學(xué)合理的施工方法來實(shí)現(xiàn)。對(duì)于采用支架法施工的大跨度外傾非對(duì)稱式系桿拱橋,鋼箱拱肋與鋼梁的拼裝、支架的拆除順序以及吊桿、系桿的張拉順序是一個(gè)非常復(fù)雜的過程,為了保證最終成橋下結(jié)構(gòu)構(gòu)件的線形狀態(tài)和應(yīng)力狀態(tài)滿足設(shè)計(jì)要求,對(duì)橋梁的整個(gè)施工過程進(jìn)行監(jiān)控是非常必要的。本文以成都市跨府河橋?yàn)楣こ瘫尘?對(duì)施工過程中橋梁結(jié)構(gòu)的變形和應(yīng)力進(jìn)行仿真計(jì)算分析,并且對(duì)該橋制定了合理的施工監(jiān)控方案。采用橋梁專業(yè)軟件Midas/Civil建立全橋有限元模型,根據(jù)實(shí)際施工過程進(jìn)行仿真模擬計(jì)算分析；采用Ansys有限元分析軟件建立鋼-混結(jié)合段局部模型,對(duì)鋼-混結(jié)合段進(jìn)行應(yīng)力分析。通過施工過程中現(xiàn)場(chǎng)實(shí)際數(shù)據(jù)與理論計(jì)算的數(shù)據(jù)進(jìn)行對(duì)比分析,并運(yùn)用綜合控制方法進(jìn)行施工監(jiān)控,對(duì)設(shè)計(jì)初期參數(shù)進(jìn)行反復(fù)的修正和調(diào)整,以更準(zhǔn)確地模擬橋梁結(jié)構(gòu)的真實(shí)情況,并且把理論計(jì)算數(shù)值運(yùn)用到下一階段的施工控制中,最終保證橋梁結(jié)構(gòu)構(gòu)件的線形狀態(tài)和應(yīng)力狀態(tài)滿足設(shè)計(jì)要求。
[Abstract]:With the rapid development of social economy in our country, the scale of bridge construction is becoming larger and larger. Bridges with large span and complicated structure are being planned and built more and more. Beautiful appearance, has been widely used in urban landscape bridges. In order to realize the linear state and stress state of the bridge under the condition of bridge completion, there are many structural system changes in the whole construction process of the large and complex bridge. It is necessary to establish a scientific and reasonable construction monitoring system for the whole bridge construction process. The structure of large span extraverted asymmetric tied arch bridge is complicated and the construction steps are various. Its reasonable internal force state and ideal linear state are not only related to the design but also depend on scientific and reasonable construction methods. It is a very complicated process for the long span externally tilted asymmetric tied arch bridge, the assembling of steel box arch rib and steel beam, the removal order of support and the tension sequence of suspender and tie bar. In order to ensure that the linear state and stress state of the structural components under the bridge finally meet the design requirements, it is necessary to monitor the whole construction process of the bridge. In this paper, the deformation and stress of the bridge structure in the construction process are simulated and analyzed, and a reasonable construction monitoring scheme is made for the bridge under the background of the bridge across the Fuhe River in Chengdu. The finite element model of the whole bridge is established by using the bridge professional software Midas/Civil, and the simulation calculation and analysis are carried out according to the actual construction process. The local model of steel-concrete joint section is established by using the Ansys finite element analysis software, and the stress analysis of the steel-concrete joint section is carried out. Through the comparison and analysis between the actual data of the site and the data calculated in theory during the construction process, the construction monitoring is carried out by using the comprehensive control method, and the parameters of the initial design are revised and adjusted repeatedly. In order to simulate the real situation of the bridge structure more accurately and apply the theoretical calculation value to the construction control in the next stage, the linear state and the stress state of the bridge structure members can meet the design requirements.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445

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本文編號(hào)：2393504