【摘要】：目前,為了解決城市交通問題,城市軌道交通作為一種新型的城市交通形式不斷被采用,它的代表是城市地鐵、城市輕軌、和城市快速鐵路。軌道交通在我國的起步比較晚,隨著軌道交通的發(fā)展,斜拉橋逐漸被應用到軌道交通中,2006年,我國第一座軌道交通斜拉橋在長春建成標志著我國軌道交通斜拉橋的開始;2014年通車的蔡家嘉陵江軌道橋是我國第一跨徑的軌道專用斜拉橋;日前正在建設的有重慶軌道環(huán)線高家花園嘉陵江軌道專用斜拉橋�，F(xiàn)階段人們對軌道交通斜拉橋的研究比較少,為了滿足列車的平穩(wěn)運行,軌道交通對橋梁的線形要求比較高,而斜拉橋是柔性體系,隨著跨徑的增大,橋梁的撓度也會增加,斜拉橋的索力是可以調(diào)節(jié)的,通過對索力的調(diào)整,可以控制斜拉橋的線形,因此,斜拉橋的索力優(yōu)化是中外學者一直研究的問題。本文以重慶市高家花園軌道斜拉橋為工程背景來研究斜拉橋的索力優(yōu)化問題。本文的主要工作包括:①首先本文收集了已建成和正在建設的斜拉橋資料,介紹了目前國內(nèi)外斜拉橋的發(fā)展現(xiàn)狀,根據(jù)斜拉橋的結構體系和特點,用結構分析基本理論闡述斜拉橋的靜力分析、動力分析、穩(wěn)定性分析和非線性分析及結構計算問題;②其次介紹了斜拉橋的合理成橋狀態(tài)確定的原則,索力優(yōu)化的基本概念,確定合理成橋狀態(tài)常用的方法(力平衡的方法、能量觀點方法、綜合優(yōu)化方法),分析并對比了各種方法的優(yōu)缺點和適用性;③目前人們對斜拉橋的索力優(yōu)化問題還沒有很好的解決方法,主要依靠經(jīng)驗的方法進行反復試算,最終找出一組合理的索力,這種方法過程復雜,計算量大,而且效率很低,而本文是在總結前人經(jīng)驗的基礎上,以控制線形為目標進行索力優(yōu)化,考慮到不同位置,主梁線形對索力變化的響應不同,提出不同控制點的權重不同,通過加權的方法進行人工干預,不同的加權系數(shù)得到的優(yōu)化結果不同,所以研究的內(nèi)容主要是確定出一組合理的權重系數(shù),來達到快速調(diào)索的目的。針對本文的依托工程通過,本人通過三種方法確定出三種不同的權重系數(shù),分別進行試算,通過對比確定出一組合理的權重系數(shù)。
[Abstract]:At present, in order to solve the problem of urban transportation, urban rail transit, as a new form of urban transportation, is used continuously. Its representatives are urban subway, urban light rail, and urban rapid railway. With the development of rail transit, the cable-stayed bridge is gradually applied to the rail transit. In 2006, the construction of the first cable-stayed bridge in Changchun marked the beginning of the cable-stayed bridge in China. Cai Jia Jialing River track Bridge, which was opened in 2014, is the first track special cable-stayed bridge in China. In order to satisfy the smooth operation of the train, the railway traffic requires the bridge to be more linear, and the cable-stayed bridge is a flexible system. With the increase of span, the deflection of the bridge will also increase. The cable force of cable-stayed bridge can be adjusted and the linear shape of cable-stayed bridge can be controlled by adjusting the cable force. Therefore, the optimization of cable force of cable-stayed bridge is always studied by Chinese and foreign scholars. Based on the engineering background of the Gaojiayuan track cable-stayed bridge in Chongqing, the cable force optimization problem of the cable-stayed bridge is studied in this paper. The main work of this paper is as follows: 1. Firstly, this paper collects the data of the cable-stayed bridge that has been built and is under construction, and introduces the development status of the cable-stayed bridge at home and abroad, according to the structure system and characteristics of the cable-stayed bridge. The static analysis, dynamic analysis, stability analysis, nonlinear analysis and structural calculation of cable-stayed bridge are discussed by using the basic theory of structural analysis. Secondly, it introduces the principle of determining the reasonable state of the cable-stayed bridge, the basic concept of cable force optimization, and the commonly used methods (force balance method, energy viewpoint method, comprehensive optimization method). The advantages and disadvantages and applicability of various methods are analyzed and compared. At present, there is no good solution to the cable force optimization problem of cable-stayed bridge. It mainly depends on the method of experience to try and calculate repeatedly, and finally to find out a group of rational cable forces. This method is complicated, has a large amount of calculation, and is very inefficient. On the basis of summing up the previous experience, this paper optimizes the cable force by taking the control line as the target. Considering the different position, the main beam line shape has different response to the cable force change, and the weight of the different control points is different. Through the artificial intervention of weighted method, the optimization results of different weighting coefficients are different, so the main content of the study is to determine a set of reasonable weight coefficients to achieve the purpose of fast adjustment. In view of the adoption of this project, I determined three different weight coefficients by three methods, and calculated them respectively, and determined a set of reasonable weight coefficients by comparison.
【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】：U448.27

【參考文獻】

相關期刊論文 前2條

1 肖能立;;斜拉橋索力優(yōu)化問題研究[J];建筑技術開發(fā);2008年02期

2 梁鵬,肖汝誠,張雪松;斜拉橋索力優(yōu)化實用方法[J];同濟大學學報(自然科學版);2003年11期

相關碩士學位論文 前1條

1 楊正華;斜拉橋結構體系及力學性能研究[D];西安建筑科技大學;2006年

，

本文編號：2415412