PC板式加劲梁悬索桥施工控制研究
发布时间：2018-08-04 11:30
【摘要】：PC板式加劲梁悬索桥因其可以利用山区的石料资源,大大节省了工程造价,这是近年来它在贵州二级公路上时有出现的一个重要原因。基于此,本文以在建中的贵州乌江大桥为研究背景,对其施工控制若干问题进行了研究,并将成果应用于实践,确保了该工程的顺利进行。本文主要的研究内容和成果如下：1) 参考解析法进行悬索桥线形计算的流程,编制了主缆系统施工监控FORTRAN计算程序,利用其对乌江大桥进行的主缆线形计算,并将相关计算结果与悬索桥施工过程结构分析系统SBCC的计算结果相比较,验证了程序的正确性。2) 针对PC板式加劲梁悬索桥锚跨的特殊性,分析了成桥状态锚跨索股索力的两种分布模式,并在施工控制计算上进行了研究,根据索股无应力长度不变的原则,建立了成缆状态下的锚跨索股张力计算程序,将得到的计算结果与实测结果进行了对比分析,提出了此类桥型锚跨索股的控制方法。3) 阐述了悬索桥在成桥状态下受到竖向荷载、横向荷载作用下的基本计算理论。全面系统地总结了悬索桥的三种主缆线形计算理论,论证了运用抛物线理论进行PC板式加劲梁悬索桥的前期线形计算的可行性。41 在弹性悬链线理论的基础上,得到了基准索股的内力及几何线形之间的关系,并利用牛顿-拉斐逊算法对此方程组进行求解,实现了考虑索鞍位置情况下的索股调整量精确计算,以此进行基准索股的调整保障了空缆线形的准确性。5) 最后运用大型有限元分析软件MIDAS对乌江大桥的加劲梁吊装施工过程进行了仿真分析,研究了此阶段中主缆线形和索塔塔顶位置的变化规律。
[Abstract]:PC-plate stiffened girder suspension bridge can use stone resources in mountainous areas, which greatly saves the project cost, which is an important reason for its emergence in Guizhou second class highway in recent years. Based on this, this paper takes the Wujiang Bridge under construction as the research background, studies some problems of its construction control, and applies the results to practice to ensure the smooth progress of the project. The main research contents and results of this paper are as follows: 1) referring to the analytical method for the calculation of the suspension bridge alignment, the FORTRAN calculation program for the construction monitoring of the main cable system is compiled, and the main cable shape calculation of the Wujiang Bridge is carried out by using the program. By comparing the calculation results with the results of SBCC system, the correctness of the program is verified. 2) aiming at the particularity of anchor span of PC-plate stiffened girder suspension bridge. In this paper, two distribution modes of cable force of anchor strands in the state of bridge are analyzed, and the calculation of construction control is studied. According to the principle of unchanging stress length of cable strands, a program for calculating the tension of cable strands in the state of cable forming is established. The calculated results are compared with the measured results, and the control method of this kind of bridge anchor strands is proposed. (.3) the basic calculation theory of suspension bridge under vertical load and lateral load is expounded. In this paper, three kinds of main cable shape calculation theories of suspension bridge are summarized, and the feasibility of using parabola theory to calculate the initial line shape of PC-plate stiffened beam suspension bridge is demonstrated. 41 on the basis of elastic catenary theory, The relationship between the internal force and geometric lines of the reference cable strands is obtained, and the Newton-Raphson algorithm is used to solve the equations, and the exact calculation of the cable strands adjustment is realized under the consideration of the saddle position of the cables. The adjustment of the standard cable strands ensures the accuracy of the aerial cable shape. Finally, the simulation analysis of the construction process of the stiffened beam of Wujiang Bridge is carried out by using the large-scale finite element analysis software MIDAS. The variation of the main cable line and the top position of the tower is studied.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4;U448.25
本文编号：2163848
[Abstract]:PC-plate stiffened girder suspension bridge can use stone resources in mountainous areas, which greatly saves the project cost, which is an important reason for its emergence in Guizhou second class highway in recent years. Based on this, this paper takes the Wujiang Bridge under construction as the research background, studies some problems of its construction control, and applies the results to practice to ensure the smooth progress of the project. The main research contents and results of this paper are as follows: 1) referring to the analytical method for the calculation of the suspension bridge alignment, the FORTRAN calculation program for the construction monitoring of the main cable system is compiled, and the main cable shape calculation of the Wujiang Bridge is carried out by using the program. By comparing the calculation results with the results of SBCC system, the correctness of the program is verified. 2) aiming at the particularity of anchor span of PC-plate stiffened girder suspension bridge. In this paper, two distribution modes of cable force of anchor strands in the state of bridge are analyzed, and the calculation of construction control is studied. According to the principle of unchanging stress length of cable strands, a program for calculating the tension of cable strands in the state of cable forming is established. The calculated results are compared with the measured results, and the control method of this kind of bridge anchor strands is proposed. (.3) the basic calculation theory of suspension bridge under vertical load and lateral load is expounded. In this paper, three kinds of main cable shape calculation theories of suspension bridge are summarized, and the feasibility of using parabola theory to calculate the initial line shape of PC-plate stiffened beam suspension bridge is demonstrated. 41 on the basis of elastic catenary theory, The relationship between the internal force and geometric lines of the reference cable strands is obtained, and the Newton-Raphson algorithm is used to solve the equations, and the exact calculation of the cable strands adjustment is realized under the consideration of the saddle position of the cables. The adjustment of the standard cable strands ensures the accuracy of the aerial cable shape. Finally, the simulation analysis of the construction process of the stiffened beam of Wujiang Bridge is carried out by using the large-scale finite element analysis software MIDAS. The variation of the main cable line and the top position of the tower is studied.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4;U448.25
【共引文献】
相关期刊论文 前2条
1 田仲初;崔后吉;彭文平;周旭;;板式加劲梁悬索桥锚跨索股分析[J];湖南交通科技;2014年02期
2 杨胜;樊小伟;;窄悬索桥加劲梁选型[J];城市道桥与防洪;2014年06期
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