瑞丽江大桥矮塔斜拉桥的施工控制关键技术研究
发布时间：2018-10-26 20:24
【摘要】：在现代科技的迅速发展的带动下,桥梁技术也有了突飞猛进的变化,各种各样的桥型不断的涌现。作为近几十年来的技术发展所产生的桥型,矮塔斜拉桥由于其结构上的特性,得到了快速的推广。为了确保结构在施工过程中的不会出现安全事故,并且结构的变形与位移处于可以控制的状态,对大跨径桥梁施工控制是非常有必要的。为了保证结构最终的线性与设计状态能够较好的吻合,对结构进行准确的施工控制是非常重要的。本文以瑞丽江大桥为研究对象,对矮塔斜拉桥施工控制的关键技术进行了有针对性的研究。主要内容如下:①介绍了矮塔斜拉桥的特点,国内外矮塔斜拉桥发展的现状以及未来的发展趋势,以及桥梁施工控制技术的发展状况。②介绍了施工控制的内容与基本原理以及方法,并提出了可能会影响到施工控制效果的因素。③运用结构分析软件Midas Civil 2012对结构建立了有限元分析模型,并分析了结构的具体施工过程中的受力以及变形,计算出桥梁的关键截面如悬臂根部、二分之一悬臂位置以及成桥状态主梁上下缘应力值以及成桥后的竖向位移值,根据分析所得到的理论计算值,给出了各施工节段所需要设置的预拱度的值。④结合瑞丽江特大桥,分析了结构对梁段自重的变化、斜拉索初张索力值变化以及预应力钢绞线的张拉控制力值这几个参数发生变化后结构响应。⑤根据有限元模型的理论计算,对结构进行了相应的施工控制,在现场对需要控制的值进行了实测,并将实测的结果按照一定的方式进行了处理,将处理后的值与理论计算值进行了比较,根据比对结果,得出了对结构的控制的效果的结论。并使用了二分法进行参数识别,验证了其具有一定的可行性。
[Abstract]:Driven by the rapid development of modern science and technology, bridge technology has also undergone rapid changes, various bridge types continue to emerge. As a bridge type produced by the development of technology in recent decades, the low tower cable-stayed bridge has been rapidly popularized because of its structural characteristics. In order to ensure that the safety accident will not occur in the construction process and the deformation and displacement of the structure are in a controllable state, it is very necessary for the construction control of the long-span bridge. In order to ensure that the final linear and design state of the structure can be well consistent, it is very important to carry out accurate construction control of the structure. Taking the Ruilijiang Bridge as the research object, the key technology of construction control of the cable-stayed bridge with low tower is studied in this paper. The main contents are as follows: 1 the characteristics of the cable-stayed bridge with low tower, the present situation of the development of the cable-stayed bridge at home and abroad and the development trend of the cable-stayed bridge in the future are introduced. And the development of bridge construction control technology. 2. The contents, basic principles and methods of construction control are introduced. The factors that may affect the construction control effect are put forward. 3 the finite element analysis model of the structure is established by using the structure analysis software Midas Civil 2012, and the stress and deformation of the structure during the construction process are analyzed. The key sections of the bridge, such as the cantilever root, the 1/2 cantilever position and the stress value of the upper and lower edge of the main beam in the state of the bridge, as well as the vertical displacement value after the completion of the bridge are calculated, and the calculated values are calculated according to the theoretical results obtained from the analysis. The values of pre-arches required for each construction section are given. 4 combined with the Ruilijiang Bridge, the variation of the structure to the dead weight of the beam section is analyzed. After the change of the initial tension force of the cable and the tension control force of the prestressed steel strand, the structural response is obtained. 5 according to the theoretical calculation of the finite element model, the corresponding construction control of the structure is carried out. The values needed to be controlled are measured in the field, and the measured results are treated in a certain way. The treated values are compared with the theoretical calculated values. According to the comparison results, the effect of the structure control is obtained. The method of dichotomy is used to identify the parameters, and the feasibility of the method is verified.
【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】：U445.4;U448.27
本文编号：2296850
[Abstract]:Driven by the rapid development of modern science and technology, bridge technology has also undergone rapid changes, various bridge types continue to emerge. As a bridge type produced by the development of technology in recent decades, the low tower cable-stayed bridge has been rapidly popularized because of its structural characteristics. In order to ensure that the safety accident will not occur in the construction process and the deformation and displacement of the structure are in a controllable state, it is very necessary for the construction control of the long-span bridge. In order to ensure that the final linear and design state of the structure can be well consistent, it is very important to carry out accurate construction control of the structure. Taking the Ruilijiang Bridge as the research object, the key technology of construction control of the cable-stayed bridge with low tower is studied in this paper. The main contents are as follows: 1 the characteristics of the cable-stayed bridge with low tower, the present situation of the development of the cable-stayed bridge at home and abroad and the development trend of the cable-stayed bridge in the future are introduced. And the development of bridge construction control technology. 2. The contents, basic principles and methods of construction control are introduced. The factors that may affect the construction control effect are put forward. 3 the finite element analysis model of the structure is established by using the structure analysis software Midas Civil 2012, and the stress and deformation of the structure during the construction process are analyzed. The key sections of the bridge, such as the cantilever root, the 1/2 cantilever position and the stress value of the upper and lower edge of the main beam in the state of the bridge, as well as the vertical displacement value after the completion of the bridge are calculated, and the calculated values are calculated according to the theoretical results obtained from the analysis. The values of pre-arches required for each construction section are given. 4 combined with the Ruilijiang Bridge, the variation of the structure to the dead weight of the beam section is analyzed. After the change of the initial tension force of the cable and the tension control force of the prestressed steel strand, the structural response is obtained. 5 according to the theoretical calculation of the finite element model, the corresponding construction control of the structure is carried out. The values needed to be controlled are measured in the field, and the measured results are treated in a certain way. The treated values are compared with the theoretical calculated values. According to the comparison results, the effect of the structure control is obtained. The method of dichotomy is used to identify the parameters, and the feasibility of the method is verified.
【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】：U445.4;U448.27
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