自锚式悬索—斜拉协作体系桥梁更换拉索施工监控研究
发布时间：2018-08-03 18:31
【摘要】：大跨径桥梁多以缆索作为承重结构，桥型主要有：悬索桥和斜拉桥。由于悬索桥和斜拉桥都有各自明显的优缺点，于是桥梁工程师探索性结合以上两种桥型结构的优点设计出一种新的桥型：自锚式悬索-斜拉协作体系结构桥梁。相应地，该新桥型也不可避免的存在在斜拉桥中需要更换拉索的问题。该桥型为一种全新的桥型，结构体系繁琐，内力变化复杂，影响因素众多。而换索工程本身就是一复杂的过程，往往涉及到设计、施工和监控等各种因素，任何一个环节若出现失误，都将导致换索工程失败。 本论文以贵州贵遵公路乌江大桥维修加固工程为背景，针对自锚式悬索—斜拉协作体系桥梁的更换拉索施工监控进行了研究，通过有限元分析对比，分析了索力重新分布后对桥梁构件等的影响。主要研究内容如下： 1）通过对自锚式悬索—斜拉协作体系桥梁斜拉索更换施工数值进行监控和分析，并指出了当前换索理论与方法存在的问题。 2）以斜拉索更换基本理论为指导，采用Midas/Ansys通用有限元计算程序，针对乌江大桥建立了有限元模型，并模拟实际换索工况，，对乌江大桥更换斜拉索工况进行了结构分析。 3）结合乌江大桥换索工程实际，借助有限元分析程序，通过将有限元分析结果与实际工程测量结果对比分析的方法，研究了斜拉桥断索后索力重新分布情况以及对主梁和塔等构件的影响，分析了桥梁在换索过程中的结构整体受力情况、变形情况及安全状况。
[Abstract]:Long-span bridges take cables as load-bearing structures. The main types of bridges are suspension bridges and cable-stayed bridges. Because the suspension bridge and the cable-stayed bridge have their own obvious advantages and disadvantages, the bridge engineers have designed a new bridge type: self-anchored suspension cable-stayed system bridge combining the advantages of the above two kinds of bridge structure. Accordingly, this new bridge type also inevitably exists in the cable-stayed bridge need to replace the cable problem. The bridge is a new type of bridge. The structure system is complicated, the internal force change is complex, and there are many influencing factors. The cable exchange project itself is a complex process, often involving design, construction and monitoring and other factors, any link if there is a fault, will lead to the failure of the cable exchange project. Based on the maintenance and reinforcement project of Wujiang Bridge on Guizun Highway in Guizhou Province, this paper studies the monitoring and control of replacement cable construction of self-anchored suspension cable-stayed cooperative system bridge, and compares it with finite element analysis. The influence of cable force redistribution on bridge components is analyzed. The main research contents are as follows: 1) through monitoring and analyzing the construction value of cable replacement of self-anchored suspension cable-stayed cooperative system bridge, The problems in the theory and method of cable replacement are pointed out. 2) under the guidance of the basic theory of cable replacement, the finite element model of Wujiang Bridge is established by using Midas/Ansys general finite element calculation program, and the actual cable changing condition is simulated. This paper analyzes the structure of Wujiang Bridge under the condition of replacing stayed cables. 3) combining with the actual project of Wujiang Bridge, with the aid of finite element analysis program, the results of finite element analysis are compared with the results of actual engineering measurement. The redistribution of cable force after cable break of cable-stayed bridge and its influence on the main beam and tower are studied, and the stress, deformation and safety of the bridge in the process of cable exchange are analyzed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4
本文编号：2162612
[Abstract]:Long-span bridges take cables as load-bearing structures. The main types of bridges are suspension bridges and cable-stayed bridges. Because the suspension bridge and the cable-stayed bridge have their own obvious advantages and disadvantages, the bridge engineers have designed a new bridge type: self-anchored suspension cable-stayed system bridge combining the advantages of the above two kinds of bridge structure. Accordingly, this new bridge type also inevitably exists in the cable-stayed bridge need to replace the cable problem. The bridge is a new type of bridge. The structure system is complicated, the internal force change is complex, and there are many influencing factors. The cable exchange project itself is a complex process, often involving design, construction and monitoring and other factors, any link if there is a fault, will lead to the failure of the cable exchange project. Based on the maintenance and reinforcement project of Wujiang Bridge on Guizun Highway in Guizhou Province, this paper studies the monitoring and control of replacement cable construction of self-anchored suspension cable-stayed cooperative system bridge, and compares it with finite element analysis. The influence of cable force redistribution on bridge components is analyzed. The main research contents are as follows: 1) through monitoring and analyzing the construction value of cable replacement of self-anchored suspension cable-stayed cooperative system bridge, The problems in the theory and method of cable replacement are pointed out. 2) under the guidance of the basic theory of cable replacement, the finite element model of Wujiang Bridge is established by using Midas/Ansys general finite element calculation program, and the actual cable changing condition is simulated. This paper analyzes the structure of Wujiang Bridge under the condition of replacing stayed cables. 3) combining with the actual project of Wujiang Bridge, with the aid of finite element analysis program, the results of finite element analysis are compared with the results of actual engineering measurement. The redistribution of cable force after cable break of cable-stayed bridge and its influence on the main beam and tower are studied, and the stress, deformation and safety of the bridge in the process of cable exchange are analyzed.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4
【参考文献】
相关期刊论文 前10条
1 张哲,张洪金,邱文亮;混凝土自锚式悬索桥模型试验研究[J];大连理工大学学报;2005年04期
2 张哲;王会利;黄才良;陈军;杜高明;;自锚式斜拉—悬索协作体系桥梁设计与分析[J];公路;2006年07期
3 闫维明;张志;陈彦江;杨小森;;大跨度斜拉桥施工过程中的索力控制方法[J];土木建筑与环境工程;2010年05期
4 肖汝诚,项海帆;斜拉桥索力优化及其工程应用[J];计算力学学报;1998年01期
5 王伯惠;斜拉—悬索协作体系桥[J];辽宁省交通高等专科学校学报;2000年03期
6 周上君;;斜拉桥非线性静力分析[J];桥梁建设;1982年04期
7 李富文,沈锐利;悬索桥的非线性静力分析[J];桥梁建设;1989年01期
8 许俊,史家钧;济南黄河公路大桥主桥换索过程的索力监测[J];同济大学学报(自然科学版);1998年04期
9 戴利民;协作体系斜拉桥的结构分析[J];同济大学学报(自然科学版);2000年01期
10 钟万勰,刘元芳,纪峥;斜拉桥施工中的张拉控制和索力调整[J];土木工程学报;1992年03期
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