轨道斜拉桥合理索力优化方法研究
发布时间：2019-01-26 11:02
【摘要】：目前,为了解决城市交通问题,城市轨道交通作为一种新型的城市交通形式不断被采用,它的代表是城市地铁、城市轻轨、和城市快速铁路。轨道交通在我国的起步比较晚,随着轨道交通的发展,斜拉桥逐渐被应用到轨道交通中,2006年,我国第一座轨道交通斜拉桥在长春建成标志着我国轨道交通斜拉桥的开始;2014年通车的蔡家嘉陵江轨道桥是我国第一跨径的轨道专用斜拉桥;日前正在建设的有重庆轨道环线高家花园嘉陵江轨道专用斜拉桥。现阶段人们对轨道交通斜拉桥的研究比较少,为了满足列车的平稳运行,轨道交通对桥梁的线形要求比较高,而斜拉桥是柔性体系,随着跨径的增大,桥梁的挠度也会增加,斜拉桥的索力是可以调节的,通过对索力的调整,可以控制斜拉桥的线形,因此,斜拉桥的索力优化是中外学者一直研究的问题。本文以重庆市高家花园轨道斜拉桥为工程背景来研究斜拉桥的索力优化问题。本文的主要工作包括:①首先本文收集了已建成和正在建设的斜拉桥资料,介绍了目前国内外斜拉桥的发展现状,根据斜拉桥的结构体系和特点,用结构分析基本理论阐述斜拉桥的静力分析、动力分析、稳定性分析和非线性分析及结构计算问题;②其次介绍了斜拉桥的合理成桥状态确定的原则,索力优化的基本概念,确定合理成桥状态常用的方法(力平衡的方法、能量观点方法、综合优化方法),分析并对比了各种方法的优缺点和适用性;③目前人们对斜拉桥的索力优化问题还没有很好的解决方法,主要依靠经验的方法进行反复试算,最终找出一组合理的索力,这种方法过程复杂,计算量大,而且效率很低,而本文是在总结前人经验的基础上,以控制线形为目标进行索力优化,考虑到不同位置,主梁线形对索力变化的响应不同,提出不同控制点的权重不同,通过加权的方法进行人工干预,不同的加权系数得到的优化结果不同,所以研究的内容主要是确定出一组合理的权重系数,来达到快速调索的目的。针对本文的依托工程通过,本人通过三种方法确定出三种不同的权重系数,分别进行试算,通过对比确定出一组合理的权重系数。
[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.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.27
本文编号：2415412
[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.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.27
【参考文献】
相关期刊论文 前2条
1 肖能立;;斜拉桥索力优化问题研究[J];建筑技术开发;2008年02期
2 梁鹏,肖汝诚,张雪松;斜拉桥索力优化实用方法[J];同济大学学报(自然科学版);2003年11期
相关硕士学位论文 前1条
1 杨正华;斜拉桥结构体系及力学性能研究[D];西安建筑科技大学;2006年
，本文编号：2415412
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