某变截面桥梁复合牵索三角挂篮悬臂施工及仿真计算
发布时间：2018-09-19 14:54
【摘要】：武汉某跨铁路斜拉桥跨径260m，桥面为从标准宽度39.0m渐变至49.899m，最大悬浇节段重达903.1t，设计承载能力1000t设计，这样超宽桥面、长节段、重量大的桥型设计给施工提出了严峻的考验，在目前已建成及在建的桥梁中，类似的桥梁比较稀少。由于无论是后支点挂篮还是牵索挂篮均难以独自完成超宽桥面、千吨位、双索面斜拉桥主梁悬浇施工的技术难题。因此进行超宽变截面桥面悬臂施工及仿真计算研究，具有重要的理论价值和工程应用意义。主要工作与结论如下： 1、本文提出将牵索挂篮和后支点三角挂篮综合使用的复合牵索三角挂篮结构体系，构思新颖，利用后支点挂篮的横向稳定性和牵索挂篮的轻盈性，综合了后支点挂篮和牵索挂篮施工工艺特点，充分发挥二者优势，以尝试新的悬浇施工技术。 2、复合牵索三角挂篮可实现变宽度桥梁施工。通过增设一片或若干片桁架，调整两片桁架之间的联结系，即调整横梁的跨度，可实现变宽度桥梁施工。 3、根据设计的施工图纸，运用大型有限元分析软件Midas/civil2012建立三维空间有限元分析模型，，利用未知荷载系数功能求得斜拉桥合理成桥状态斜拉索索力。采用正装法对施工工程进行计算分析，求得施工阶段斜拉索索力，确定合理的施工状态。 4、本文选择最大悬臂浇筑施工阶段进行分析、验算，通过斜拉桥的索力、挠度、主梁弯矩、主塔纵向偏位计算结果分析，悬臂浇筑施工过程中是满足规范要求。求得的施工阶段索力与合理成桥索力相差较小，斜拉桥仿真建模计算是准确的，能满足工程应用要求，为同类型桥梁的设计、施工提供借鉴作用。
[Abstract]:The span of a cable-stayed bridge over Wuhan railway is 260 m, the deck is gradually changed from 39.0m to 49.899m in standard width, the maximum suspended section weight is 903.1t, and the design bearing capacity is 1000t. The design of super-wide deck, long section and large weight bridge provides a severe test for the construction. Among the bridges that have been built and are under construction, similar bridges are rare. It is difficult for both the rear fulcrum hanging basket and the pulling cable hanging basket to complete the construction of super wide bridge deck, thousand tons, double cable plane cable-stayed bridge girder suspension casting alone. Therefore, it has important theoretical value and engineering application significance to study the cantilever construction and simulation calculation of super wide and variable cross-section bridge deck. The main work and conclusions are as follows: 1. This paper puts forward a new structure system of the composite triangulation hanging basket, which is used in the combination of the pulling cable hanging basket and the rear fulcrum triangle hanging basket. Based on the lateral stability of the rear fulcrum and the lightness of the cable hanging basket, this paper synthesizes the construction technology characteristics of the rear fulcrum hanging basket and the pulling cable hanging basket, and gives full play to the advantages of the two methods. In order to try the new construction technology of suspension casting. 2, the construction of bridge with variable width can be realized by the triangle hanging basket of compound pull cable. By adding one or more pieces of trusses and adjusting the coupling between the two trusses, that is, adjusting the span of the crossbeam, the construction of the bridge with variable width can be realized. The three-dimensional spatial finite element analysis model is established by using the large-scale finite element analysis software Midas/civil2012, and the rational cable-stayed cable force in the state of cable-stayed bridge is obtained by using the function of unknown load coefficient. In this paper, the cable force of the cable-stayed bridge in the construction stage is calculated and analyzed by means of the formal installation method, and the reasonable construction state is determined. 4. In this paper, the maximum cantilever construction stage is selected for analysis, checking calculation, and through the cable force of the cable-stayed bridge, the cable force of the cable-stayed bridge is obtained. Deflection, bending moment of main beam, longitudinal deflection of main tower analysis, cantilever construction process is to meet the requirements of the code. The difference between the cable force obtained in construction stage and the reasonable cable force is relatively small. The simulation modeling and calculation of cable-stayed bridge is accurate, which can meet the requirements of engineering application and provide reference for the design and construction of the same type of bridge.
【学位授予单位】：武汉科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4
本文编号：2250456
[Abstract]:The span of a cable-stayed bridge over Wuhan railway is 260 m, the deck is gradually changed from 39.0m to 49.899m in standard width, the maximum suspended section weight is 903.1t, and the design bearing capacity is 1000t. The design of super-wide deck, long section and large weight bridge provides a severe test for the construction. Among the bridges that have been built and are under construction, similar bridges are rare. It is difficult for both the rear fulcrum hanging basket and the pulling cable hanging basket to complete the construction of super wide bridge deck, thousand tons, double cable plane cable-stayed bridge girder suspension casting alone. Therefore, it has important theoretical value and engineering application significance to study the cantilever construction and simulation calculation of super wide and variable cross-section bridge deck. The main work and conclusions are as follows: 1. This paper puts forward a new structure system of the composite triangulation hanging basket, which is used in the combination of the pulling cable hanging basket and the rear fulcrum triangle hanging basket. Based on the lateral stability of the rear fulcrum and the lightness of the cable hanging basket, this paper synthesizes the construction technology characteristics of the rear fulcrum hanging basket and the pulling cable hanging basket, and gives full play to the advantages of the two methods. In order to try the new construction technology of suspension casting. 2, the construction of bridge with variable width can be realized by the triangle hanging basket of compound pull cable. By adding one or more pieces of trusses and adjusting the coupling between the two trusses, that is, adjusting the span of the crossbeam, the construction of the bridge with variable width can be realized. The three-dimensional spatial finite element analysis model is established by using the large-scale finite element analysis software Midas/civil2012, and the rational cable-stayed cable force in the state of cable-stayed bridge is obtained by using the function of unknown load coefficient. In this paper, the cable force of the cable-stayed bridge in the construction stage is calculated and analyzed by means of the formal installation method, and the reasonable construction state is determined. 4. In this paper, the maximum cantilever construction stage is selected for analysis, checking calculation, and through the cable force of the cable-stayed bridge, the cable force of the cable-stayed bridge is obtained. Deflection, bending moment of main beam, longitudinal deflection of main tower analysis, cantilever construction process is to meet the requirements of the code. The difference between the cable force obtained in construction stage and the reasonable cable force is relatively small. The simulation modeling and calculation of cable-stayed bridge is accurate, which can meet the requirements of engineering application and provide reference for the design and construction of the same type of bridge.
【学位授予单位】：武汉科技大学
【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 卫星,强士中;利用ANSYS实现斜拉桥非线性分析[J];四川建筑科学研究;2003年04期
2 M．Virlogeux,杨祖东;诺曼底大桥的设计与施工[J];城市道桥与防洪;1995年03期
3 游庆仲;何平;董学武;张喜刚;吴寿昌;;苏通大桥——主跨1088米的斜拉桥[J];中国工程科学;2009年03期
4 金增洪;法国诺曼底大桥简介[J];国外公路;1996年04期
5 罗岩枫;蒙立和;;百色东合大桥索力分析及施工控制技术[J];公路;2013年05期
6 陈丽英;;利用Midas软件进行连续梁施工三角挂篮主桁设计[J];国防交通工程与技术;2013年03期
7 唐红;刘成钢;;变截面连续箱梁支架法现浇施工技术应用[J];工程建设与设计;2013年10期
8 夏龙;;高尧Ⅰ号大桥连续刚构三种挂篮主桁的设计分析[J];北方交通;2011年06期
9 颜全胜,韩大建;番禺大桥斜拉桥的施工控制(英文)[J];华南理工大学学报(自然科学版);2001年10期
10 吴运宏;岳青;江ng;王戒躁;;混凝土斜拉桥前支点挂篮施工控制[J];现代交通技术;2012年05期
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