【摘要】：PC板式加勁梁懸索橋因其可以利用山區(qū)的石料資源,大大節(jié)省了工程造價,這是近年來它在貴州二級公路上時有出現(xiàn)的一個重要原因�；诖�,本文以在建中的貴州烏江大橋為研究背景,對其施工控制若干問題進行了研究,并將成果應用于實踐,確保了該工程的順利進行。本文主要的研究內(nèi)容和成果如下：1) 參考解析法進行懸索橋線形計算的流程,編制了主纜系統(tǒng)施工監(jiān)控FORTRAN計算程序,利用其對烏江大橋進行的主纜線形計算,并將相關計算結(jié)果與懸索橋施工過程結(jié)構(gòu)分析系統(tǒng)SBCC的計算結(jié)果相比較,驗證了程序的正確性。2) 針對PC板式加勁梁懸索橋錨跨的特殊性,分析了成橋狀態(tài)錨跨索股索力的兩種分布模式,并在施工控制計算上進行了研究,根據(jù)索股無應力長度不變的原則,建立了成纜狀態(tài)下的錨跨索股張力計算程序,將得到的計算結(jié)果與實測結(jié)果進行了對比分析,提出了此類橋型錨跨索股的控制方法。3) 闡述了懸索橋在成橋狀態(tài)下受到豎向荷載、橫向荷載作用下的基本計算理論。全面系統(tǒng)地總結(jié)了懸索橋的三種主纜線形計算理論,論證了運用拋物線理論進行PC板式加勁梁懸索橋的前期線形計算的可行性。41 在彈性懸鏈線理論的基礎上,得到了基準索股的內(nèi)力及幾何線形之間的關系,并利用牛頓-拉斐遜算法對此方程組進行求解,實現(xiàn)了考慮索鞍位置情況下的索股調(diào)整量精確計算,以此進行基準索股的調(diào)整保障了空纜線形的準確性。5) 最后運用大型有限元分析軟件MIDAS對烏江大橋的加勁梁吊裝施工過程進行了仿真分析,研究了此階段中主纜線形和索塔塔頂位置的變化規(guī)律。
[Abstract]:PC-plate stiffened girder suspension bridge can use stone resources in mountainous areas, which greatly saves the project cost, which is an important reason for its emergence in Guizhou second class highway in recent years. Based on this, this paper takes the Wujiang Bridge under construction as the research background, studies some problems of its construction control, and applies the results to practice to ensure the smooth progress of the project. The main research contents and results of this paper are as follows: 1) referring to the analytical method for the calculation of the suspension bridge alignment, the FORTRAN calculation program for the construction monitoring of the main cable system is compiled, and the main cable shape calculation of the Wujiang Bridge is carried out by using the program. By comparing the calculation results with the results of SBCC system, the correctness of the program is verified. 2) aiming at the particularity of anchor span of PC-plate stiffened girder suspension bridge. In this paper, two distribution modes of cable force of anchor strands in the state of bridge are analyzed, and the calculation of construction control is studied. According to the principle of unchanging stress length of cable strands, a program for calculating the tension of cable strands in the state of cable forming is established. The calculated results are compared with the measured results, and the control method of this kind of bridge anchor strands is proposed. (.3) the basic calculation theory of suspension bridge under vertical load and lateral load is expounded. In this paper, three kinds of main cable shape calculation theories of suspension bridge are summarized, and the feasibility of using parabola theory to calculate the initial line shape of PC-plate stiffened beam suspension bridge is demonstrated. 41 on the basis of elastic catenary theory, The relationship between the internal force and geometric lines of the reference cable strands is obtained, and the Newton-Raphson algorithm is used to solve the equations, and the exact calculation of the cable strands adjustment is realized under the consideration of the saddle position of the cables. The adjustment of the standard cable strands ensures the accuracy of the aerial cable shape. Finally, the simulation analysis of the construction process of the stiffened beam of Wujiang Bridge is carried out by using the large-scale finite element analysis software MIDAS. The variation of the main cable line and the top position of the tower is studied.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.4;U448.25

【共引文獻】

相關期刊論文 前2條

1 田仲初;崔后吉;彭文平;周旭;;板式加勁梁懸索橋錨跨索股分析[J];湖南交通科技;2014年02期

2 楊勝;樊小偉;;窄懸索橋加勁梁選型[J];城市道橋與防洪;2014年06期

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本文編號：2163848