【摘要】：自上世紀九十年代以來，在我國，鋼管混凝土拱橋取得了迅猛地發展。伴隨著鋼管混凝土拱橋跨徑的增大以及數量的增多，我國鋼管混凝土拱橋在施工技術上已達到一定的水平，然而相對于相對滯后的理論研究，國內目前尚沒有鋼管混凝土拱橋統一完善的施工技術規范，以至于鋼管混凝土拱橋施工往往是無章可循，尤其是對于管內混凝土施工的模擬仿真計算方面缺乏深入的研究。因此研究該階段結構仿真模擬不僅是鋼管混凝土拱橋理論發展的需要，更是工程界的迫切要求。 對于橋梁轉體施工，它是一種無需支架的施工方法，在通過山谷、大河以及跨越既有線等方面，具有相當優越的能力。對于早期轉體施工技術，主要用于在山區建設跨越山谷或河流的橋梁，并且多是拱橋。 本文依托河北省交通運輸廳科技項目《超寬大跨鋼管混凝土提籃拱施工監控關鍵技術研究》，以河北省張石高速滹沱河特大橋為依托工程，主要研究內容為： (1)詳細闡述了鋼管提籃拱橋轉體施工控制的工作原理、施工工藝的特點、轉體施工的關鍵技術以及適用范圍。 (2)根據實際施工情況建立施工過程模擬的空間有限元模型，進行鋼管混凝土拱橋轉體施工過程仿真分析，分析轉體施工過程中結構的受力性能，，預測施工過程中的應力和變形的發展情況，并為實際工程施工控制提供理論依據和指導。 (3)為了保證滹沱河特大橋最終的成橋線形以及受力狀態能夠滿足設計要求，由此對其建立了實時監控系統。通過鋼管混凝土拱橋的轉體施工過程的模擬分析計算，將仿真模型計算結果與現場實際監測數據進行比較分析，仿真模型計算的理論值與實際監測結果吻合較好，這反映了本文所采用的有限元分析方法，能夠較好的反映了轉體施工實際。轉體施工控制仿真分析對濾沱河大橋施工監控能起到較好的指導作用。
[Abstract]:Since 1990's, concrete filled steel tubular arch bridges have developed rapidly in China. With the increase of span and quantity of CFST arch bridge, the construction technology of CFST arch bridge in China has reached a certain level, but the theoretical research is relatively lagging behind. At present, there is no unified construction technical code for concrete-filled steel tube arch bridge, so that the construction of concrete filled steel tube arch bridge is often without rules to follow, especially for the concrete in pipe construction simulation and simulation of the lack of in-depth research. Therefore, it is not only the need of theoretical development of CFST arch bridge, but also the urgent requirement of engineering field to study the simulation of structure in this stage. For bridge construction, it is a kind of construction method without support, and it has the superior ability to pass through valleys, rivers and cross existing lines. For the early turning construction technology, it is mainly used to build bridges across valleys or rivers in mountainous areas, and most of them are arch bridges. This paper relies on the scientific and technological project of Hebei Provincial Communications and Transportation Department, "Research on the key technology of construction monitoring of super large span concrete filled steel tube hoist arch", and takes Zhangshi High Speed Hutuo River Bridge in Hebei Province as the backing project. The main research contents are as follows: (1) the working principle, the characteristics of the construction technology, the key technology and the applicable scope of the rotary construction of the steel pipe hoist arch bridge are expounded in detail. (2) according to the actual construction conditions, the spatial finite element model of the construction process simulation is established, and the simulation analysis of the construction process of the concrete-filled steel tubular arch bridge is carried out, and the mechanical performance of the structure during the rotating construction process is analyzed. The development of stress and deformation in construction process is predicted, and the theoretical basis and guidance for practical engineering construction control are provided. (3) in order to ensure that the final shape and force state of Hutuo River Bridge can meet the design requirements, a real-time monitoring system is established for the Hutuo River Bridge. Through the simulation analysis and calculation of the rotating construction process of the concrete-filled steel tube arch bridge, the results of the simulation model calculation are compared with the actual monitoring data. The theoretical value of the simulation model calculation is in good agreement with the actual monitoring result. This reflects the finite element analysis method adopted in this paper, and can better reflect the practice of rotary construction. Simulation analysis of rotary construction control can play a good guiding role in construction monitoring of Zhuantuo River Bridge.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.4

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