独塔悬索桥结构参数影响分析研究

发布时间：2018-05-26 04:48

本文选题：悬索桥 + 索塔变形　；参考：《重庆交通大学》2014年硕士论文

【摘要】：悬索桥作为大跨径、特大跨径的常用桥型，被广大桥梁设计者经常使用。对于重庆地区，由于具有良好的地质构造条件，尤其适宜于修建地锚式悬索桥。本文基于对寸滩长江大桥地锚式独塔悬索桥投标方案的分析和理解，对独塔悬索桥的承载力做了一定的计算分析。首先，本文介绍了悬索桥的发展历史和发展现状，对比自锚式悬索桥的优缺点，，由于施工复杂，受力不够明确，因此提出了在重庆地区席间更加具有优势的地锚式独塔悬索桥。其次，介绍了悬索桥的静力分析理论，包括弹性理论、挠度理论以及有限位移理论与非线性理论等经典的分析理论。然后，说明了重庆寸滩长江大桥的一些基本情况，大致为重庆寸滩长江大桥的项目建设背景、工程地理位置、主要技术标准、工程建设的必要性和工程建设目标、对招标项目所在地区建设条件的认识、对项目的总体设计、桥梁方案的设计，最后以重庆市寸滩长江大桥原独塔悬索桥投标方案为依托，建立有限元模型，重点分析独塔悬索桥在静载作用下的承载力和变形情况，探究建设独塔悬索桥的合理性。接着，改变地锚式悬索桥的各项参数，其对索塔弯矩、主缆轴力、主缆变形、吊杆变形、加劲梁变形会产生影响。本章研究改变悬索桥参数后对全桥承载力影响，以索塔塔底截面弯矩、边缆轴力、主缆跨中截面竖向变形为研究对象，分别改变悬索桥垂跨比、高跨比、主塔塔高的情况下，分析比较其对悬索桥承载力影响。最后，对寸滩长江大桥原地锚式独塔悬索桥方案进行修正，采用新的参数进行验算分析，得出具有更加合理形态的独塔悬索桥。
[Abstract]:Suspension bridge, as a common bridge type with long span and long span, is often used by bridge designers. For Chongqing area, because of the good geological structure condition, it is especially suitable for the construction of ground anchor suspension bridge. Based on the analysis and understanding of the bidding scheme of the ground-anchored single-tower suspension bridge of the Putan Yangtze River Bridge, the bearing capacity of the single-tower suspension bridge is calculated and analyzed. Firstly, this paper introduces the development history and present situation of suspension bridge, compares the advantages and disadvantages of self-anchored suspension bridge, because the construction is complex, the force is not clear enough, so the ground-anchored single-tower suspension bridge with more advantages in Chongqing area is put forward. Secondly, the static analysis theory of suspension bridge is introduced, including elastic theory, deflection theory, finite displacement theory and nonlinear theory. Then, it explains some basic conditions of the Chongqing Cutan Yangtze River Bridge, which is roughly the background of the project construction, the location of the project, the main technical standards, the necessity of the project construction and the project construction objectives. Based on the understanding of the construction conditions in the area where the bidding project is located, the overall design of the project and the design of the bridge scheme, the finite element model is established on the basis of the bidding scheme of the original single-tower suspension bridge of the Putan Yangtze River Bridge in Chongqing. The bearing capacity and deformation of single tower suspension bridge under static load are analyzed, and the rationality of building single tower suspension bridge is explored. Then, the parameters of the ground anchor suspension bridge are changed, which will affect the bending moment of cable tower, the axial force of the main cable, the deformation of the suspension rod and the deformation of the stiffened beam. In this chapter, the effect of changing the parameters of suspension bridge on the bearing capacity of the whole bridge is studied. Taking the bending moment of the bottom section of the tower, the axial force of the side cable and the vertical deformation of the middle section of the main cable span as the research objects, the vertical span ratio, the height span ratio and the tower height of the suspension bridge are changed respectively. The influence of the bridge on the bearing capacity of suspension bridge is analyzed and compared. Finally, the scheme of standing anchor single tower suspension bridge of Putan Yangtze River Bridge is revised, and the new parameters are used to check and analyze, and a more reasonable form of single tower suspension bridge is obtained.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.25

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