【摘要】：近年來，，斜拉橋在我國迅速發(fā)展，由于獨塔斜拉橋在美學(xué)上的優(yōu)勢，目前采用這種形式的橋梁越來越多，既有采用完全混凝土或鋼梁的，也有主鋼邊混的混合梁。本文以南淝河大橋為工程背景，對獨塔斜拉橋進行靜力計算分析，同時對其穩(wěn)定特性進行研究。該橋為塔梁墩固結(jié)體系，是合肥市目前單跨跨度最大、主塔柱最高、寬度最寬的跨河橋。 文中回顧了斜拉橋和獨塔斜拉橋的起源及其在國內(nèi)外的發(fā)展概況，并扼要說明了獨塔斜拉橋的結(jié)構(gòu)特點和適用范圍。利用有限元軟件Midas/Civil2012建立全橋計算模型，對其施工階段和運營階段的受力情況及變形特征進行計算分析。根據(jù)荷載工況建立Midas模型模擬其屈曲模態(tài)，對該橋的穩(wěn)定特性進行分析。應(yīng)用ANSYS建立空間計算模型，分析在施工狀態(tài)下第三對斜拉索張拉時混凝土橋塔的空間受力特性。分析研究的成果將為南淝河大橋施工控制提供參考，也可為同類型橋梁的設(shè)計提供參考。
[Abstract]:In recent years, cable-stayed bridges have developed rapidly in China. Due to the aesthetic advantages of single-tower cable-stayed bridges, more and more bridges are used in this form. Taking Nanfeihe River Bridge as the engineering background, the static calculation and analysis of the single tower cable-stayed bridge are carried out in this paper, and the stability characteristics of the bridge are also studied. The bridge is a consolidation system of tower and beam piers. It is the largest single span bridge with the highest main tower column and the widest width in Hefei at present. In this paper, the origin of cable-stayed bridges and single-tower cable-stayed bridges and their development at home and abroad are reviewed, and the structural characteristics and applicable scope of single-pylon cable-stayed bridges are briefly described. The finite element software Midas/Civil2012 is used to establish the calculation model of the whole bridge, and the stress and deformation characteristics of the bridge during the construction and operation stages are calculated and analyzed. Midas model is established to simulate the buckling mode of the bridge according to the load condition, and the stability characteristics of the bridge are analyzed. The spatial calculation model is established by using ANSYS to analyze the spatial stress characteristics of the concrete bridge tower under the third cable tension under the construction condition. The results of analysis and research will provide a reference for the construction control of Nanfeihe River Bridge and the design of the same type of bridge.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U448.27

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