本文關鍵詞：矮塔斜拉橋施工過程非線性效應分析　出處：《中南林業(yè)科技大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： 矮塔斜拉橋 施工過程 徐變效應 幾何非線性 施工監(jiān)測

【摘要】：矮塔斜拉橋作為近些年來在國內(nèi)應用較多的一種新型斜拉橋,隨著跨度的增大,施工持續(xù)時間延長,在施工過程中出現(xiàn)的問題越來越多,形式也變得越來越復雜；其中最為明顯的是關于如何控制施工精度的問題。本文從提高施工技術精度的觀點出發(fā),分析了采用懸臂施工技術的矮塔斜拉橋在施工過程中非線性效應,對影響矮塔斜拉橋施工技術精度的相關因素進行了探討。 本文主要進行了以下幾方面的工作： (1)簡要介紹了矮塔斜拉橋的發(fā)展背景,論述了矮塔斜拉橋主要構件及力學性能研究現(xiàn)狀、對當前矮塔斜拉橋施工技術的研究現(xiàn)狀做了簡要總結； (2)對矮塔斜拉橋懸臂施工技術的一些關鍵問題進行了闡述,詳細推導了求解斜拉索初張力的計算公式、在懸臂施工過程中考慮幾何非線性效應與混凝土材料徐變效應的方法,以及如何就提高施工技術的精度建立施工控制系統(tǒng)； (3)采用專用橋梁分析軟件MIDAS/CIVIL,分別分析了徐變效應與幾何非線性效應對采用懸臂施工技術的矮塔斜拉橋的影響,對比了施工過程中的撓度與應力變化； (4)通過實橋施工過程監(jiān)測數(shù)據(jù)與有限元分析結果的比較,驗證了理論分析方法的合理性以及非線性效應對施工精度的影響程度。
[Abstract]:As a new type of cable-stayed bridge which is widely used in China in recent years, with the increase of span, the construction duration is prolonged, and more and more problems appear in the construction process. Forms are also becoming more and more complex; The most obvious problem is how to control the construction accuracy. From the point of view of improving the precision of construction technology, this paper analyzes the nonlinear effect of the low tower cable-stayed bridge with cantilever construction technology in the construction process. The related factors affecting the construction accuracy of low tower cable-stayed bridge are discussed. The main work of this paper is as follows: 1) the development background of the cable-stayed bridge with low tower is briefly introduced, the research status of main components and mechanical properties of the cable-stayed bridge with low tower is discussed, and the research status of construction technology of cable-stayed bridge with low tower is summarized briefly. This paper expounds some key problems of cantilever construction technology of cable-stayed bridge with low tower, and deduces the calculation formula of initial tension of cable-stayed bridge in detail. The method of considering geometric nonlinear effect and creep effect of concrete material during cantilever construction, and how to establish construction control system to improve the precision of construction technology; 3) the effects of creep effect and geometric nonlinear effect on the cable-stayed bridge with cantilever construction technology are analyzed by Midas / CIVILI, which is a special bridge analysis software. The deflection and stress changes during construction are compared. 4) the rationality of the theoretical analysis method and the influence of nonlinear effect on the construction accuracy are verified by comparing the monitoring data of the construction process of the real bridge with the results of the finite element analysis.
【學位授予單位】：中南林業(yè)科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445;U448.27

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本文編號：1403419