發(fā)布時(shí)間：2018-11-26 10:42

【摘要】：自上世紀(jì)九十年代以來(lái)，在我國(guó)，鋼管混凝土拱橋取得了迅猛地發(fā)展。伴隨著鋼管混凝土拱橋跨徑的增大以及數(shù)量的增多，我國(guó)鋼管混凝土拱橋在施工技術(shù)上已達(dá)到一定的水平，然而相對(duì)于相對(duì)滯后的理論研究，國(guó)內(nèi)目前尚沒有鋼管混凝土拱橋統(tǒng)一完善的施工技術(shù)規(guī)范，以至于鋼管混凝土拱橋施工往往是無(wú)章可循，尤其是對(duì)于管內(nèi)混凝土施工的模擬仿真計(jì)算方面缺乏深入的研究。因此研究該階段結(jié)構(gòu)仿真模擬不僅是鋼管混凝土拱橋理論發(fā)展的需要，更是工程界的迫切要求。 對(duì)于橋梁轉(zhuǎn)體施工，它是一種無(wú)需支架的施工方法，在通過(guò)山谷、大河以及跨越既有線等方面，具有相當(dāng)優(yōu)越的能力。對(duì)于早期轉(zhuǎn)體施工技術(shù)，主要用于在山區(qū)建設(shè)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(yùn)輸廳科技項(xiàng)目《超寬大跨鋼管混凝土提籃拱施工監(jiān)控關(guān)鍵技術(shù)研究》，以河北省張石高速滹沱河特大橋?yàn)橐劳泄こ�，主要研究�(jī)?nèi)容為： (1)詳細(xì)闡述了鋼管提籃拱橋轉(zhuǎn)體施工控制的工作原理、施工工藝的特點(diǎn)、轉(zhuǎn)體施工的關(guān)鍵技術(shù)以及適用范圍。 (2)根據(jù)實(shí)際施工情況建立施工過(guò)程模擬的空間有限元模型，進(jìn)行鋼管混凝土拱橋轉(zhuǎn)體施工過(guò)程仿真分析，分析轉(zhuǎn)體施工過(guò)程中結(jié)構(gòu)的受力性能，，預(yù)測(cè)施工過(guò)程中的應(yīng)力和變形的發(fā)展情況，并為實(shí)際工程施工控制提供理論依據(jù)和指導(dǎo)。 (3)為了保證滹沱河特大橋最終的成橋線形以及受力狀態(tài)能夠滿足設(shè)計(jì)要求，由此對(duì)其建立了實(shí)時(shí)監(jiān)控系統(tǒng)。通過(guò)鋼管混凝土拱橋的轉(zhuǎn)體施工過(guò)程的模擬分析計(jì)算，將仿真模型計(jì)算結(jié)果與現(xiàn)場(chǎng)實(shí)際監(jiān)測(cè)數(shù)據(jù)進(jìn)行比較分析，仿真模型計(jì)算的理論值與實(shí)際監(jiān)測(cè)結(jié)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(zhuǎn)體施工實(shí)際。轉(zhuǎn)體施工控制仿真分析對(duì)濾沱河大橋施工監(jiān)控能起到較好的指導(dǎo)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(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U445.4

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