PC斜拉桥塔梁同步施工研究
发布时间：2018-10-04 22:11
【摘要】：斜拉桥是由塔、梁、索三种基本部件构成的一种组合结构桥梁体系，属高次超静定的柔性结构。随着社会发展，人们对斜拉桥施工要求越来越高，在保证桥梁施工安全、质量的前提下，施工进度也成了备受关注的问题。塔梁同步施工相比传统的先塔后梁施工而言，在施工进度上表现出了明显的优越性。本文以重庆忠县长江大桥为依托，对PC斜拉桥塔梁同步施工进行研究。 首先，对斜拉桥的施工阶段受力特点和施工计算理论进行了讨论分析，为后续数值模拟提供理论基础。其次，采用韩国MIDAS公司编制的有限元软件MIDAS/CIVIL2011建立了重庆忠县长江大桥的空间有限元模型，对塔梁同步与先塔后梁两种施工方案的施工过程进行了仿真计算，并从成桥索力、主梁预拱度、塔梁应力等方面进行了斜拉桥塔梁同步施工的可行性分析。然后，在前述的基础上，对索塔在塔梁同步施工期间不同荷载工况下的稳定性做了分析，即对塔梁同步施工的可行性做了补充。最后，从影响塔梁同步施工的控制因素、控制措施、应用范围等方面对塔梁同步施工方法进行了探讨，以保证塔梁施工的顺利实施。 本文的研究成果为PC斜拉桥的同步施工提供技术支撑。同时，对同类桥梁提高施工进度和施工技术水平具有积极的意义。
[Abstract]:The cable-stayed bridge is a kind of composite structure bridge system composed of three basic components: tower, beam and cable. It belongs to the flexible structure of high order statically indeterminate structure. With the development of society, the construction requirements of cable-stayed bridges are becoming more and more high. On the premise of ensuring the safety and quality of the bridge construction, the construction schedule has become a problem of great concern. Compared with the traditional construction of tower and beam, the construction schedule of tower and beam shows obvious superiority. Based on the Yangtze River Bridge in Zhongxian, Chongqing, this paper studies the synchronous construction of tower beam of PC cable-stayed bridge. Firstly, the stress characteristics and construction calculation theory of cable-stayed bridge in construction stage are discussed and analyzed, which provides a theoretical basis for subsequent numerical simulation. Secondly, the spatial finite element model of Chongqing Zhongxian Yangtze River Bridge is established by using the finite element software MIDAS/CIVIL2011 compiled by MIDAS Company of South Korea. The construction process of the tower beam and the first tower and the rear beam are simulated and calculated, and the cable force of the bridge is obtained. The feasibility of synchronous construction of tower beam of cable-stayed bridge is analyzed in the aspects of pre-arch degree and stress of tower beam. Then, on the basis of the foregoing, the stability of the cable tower under different load conditions during the synchronous construction of the tower and beam is analyzed, that is, the feasibility of the synchronous construction of the tower and beam is supplemented. Finally, the control factors, control measures and application scope of the tower beam synchronous construction are discussed in order to ensure the smooth implementation of the tower beam construction. The research results of this paper provide technical support for synchronous construction of PC cable-stayed bridge. At the same time, it has positive significance for the similar bridges to improve the construction progress and construction technology level.
【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】：U448.27
本文编号：2252067
[Abstract]:The cable-stayed bridge is a kind of composite structure bridge system composed of three basic components: tower, beam and cable. It belongs to the flexible structure of high order statically indeterminate structure. With the development of society, the construction requirements of cable-stayed bridges are becoming more and more high. On the premise of ensuring the safety and quality of the bridge construction, the construction schedule has become a problem of great concern. Compared with the traditional construction of tower and beam, the construction schedule of tower and beam shows obvious superiority. Based on the Yangtze River Bridge in Zhongxian, Chongqing, this paper studies the synchronous construction of tower beam of PC cable-stayed bridge. Firstly, the stress characteristics and construction calculation theory of cable-stayed bridge in construction stage are discussed and analyzed, which provides a theoretical basis for subsequent numerical simulation. Secondly, the spatial finite element model of Chongqing Zhongxian Yangtze River Bridge is established by using the finite element software MIDAS/CIVIL2011 compiled by MIDAS Company of South Korea. The construction process of the tower beam and the first tower and the rear beam are simulated and calculated, and the cable force of the bridge is obtained. The feasibility of synchronous construction of tower beam of cable-stayed bridge is analyzed in the aspects of pre-arch degree and stress of tower beam. Then, on the basis of the foregoing, the stability of the cable tower under different load conditions during the synchronous construction of the tower and beam is analyzed, that is, the feasibility of the synchronous construction of the tower and beam is supplemented. Finally, the control factors, control measures and application scope of the tower beam synchronous construction are discussed in order to ensure the smooth implementation of the tower beam construction. The research results of this paper provide technical support for synchronous construction of PC cable-stayed bridge. At the same time, it has positive significance for the similar bridges to improve the construction progress and construction technology level.
【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】：U448.27
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