【摘要】：在現代科技的迅速發(fā)展的帶動下,橋梁技術也有了突飛猛進的變化,各種各樣的橋型不斷的涌現。作為近幾十年來的技術發(fā)展所產生的橋型,矮塔斜拉橋由于其結構上的特性,得到了快速的推廣。為了確保結構在施工過程中的不會出現安全事故,并且結構的變形與位移處于可以控制的狀態(tài),對大跨徑橋梁施工控制是非常有必要的。為了保證結構最終的線性與設計狀態(tài)能夠較好的吻合,對結構進行準確的施工控制是非常重要的。本文以瑞麗江大橋為研究對象,對矮塔斜拉橋施工控制的關鍵技術進行了有針對性的研究。主要內容如下:①介紹了矮塔斜拉橋的特點,國內外矮塔斜拉橋發(fā)展的現狀以及未來的發(fā)展趨勢,以及橋梁施工控制技術的發(fā)展狀況。②介紹了施工控制的內容與基本原理以及方法,并提出了可能會影響到施工控制效果的因素。③運用結構分析軟件Midas Civil 2012對結構建立了有限元分析模型,并分析了結構的具體施工過程中的受力以及變形,計算出橋梁的關鍵截面如懸臂根部、二分之一懸臂位置以及成橋狀態(tài)主梁上下緣應力值以及成橋后的豎向位移值,根據分析所得到的理論計算值,給出了各施工節(jié)段所需要設置的預拱度的值。④結合瑞麗江特大橋,分析了結構對梁段自重的變化、斜拉索初張索力值變化以及預應力鋼絞線的張拉控制力值這幾個參數發(fā)生變化后結構響應。⑤根據有限元模型的理論計算,對結構進行了相應的施工控制,在現場對需要控制的值進行了實測,并將實測的結果按照一定的方式進行了處理,將處理后的值與理論計算值進行了比較,根據比對結果,得出了對結構的控制的效果的結論。并使用了二分法進行參數識別,驗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.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U445.4;U448.27

【參考文獻】

相關期刊論文 前3條

1 鐘繼衛(wèi);斜拉橋合龍后索力最優(yōu)調整的實現[J];世界橋梁;2002年04期

2 陳寶春;彭桂瀚;;部分斜拉橋發(fā)展綜述[J];華東公路;2004年03期

3 孫秀紅;;斜拉橋應力與索力測試[J];黑龍江交通科技;2011年02期

相關博士學位論文 前1條

1 陳從春;矮塔斜拉橋設計理論核心問題研究[D];同濟大學;2006年

，

本文編號：2296851