独塔斜拉桥的合理成桥索力研究
发布时间：2019-06-03 19:48
【摘要】：独塔斜拉桥的内力和主桥的线形可以通过拉索的索力来调节，所以可以通过优化成桥索力来优化斜拉桥的成桥受力状态。当斜拉桥的受力体系确定后，可以找到一组索力，即合理成桥索力，使斜拉桥达到合理的成桥受力状态。在独折塔斜拉桥中，折塔主要影响斜拉桥的整体结构受力，因此，合理成桥索力必须保证折塔斜拉桥的受力状态。 本文研究了两个问题：第一什么是合理成桥状态；第二怎样调整索力来得到这个成桥状态。 文章首先总结了确定斜拉桥合理成桥索力的方法，分析了影响矩阵法和最小弯曲能量法等原理，将这几种方法做了比较，并分析了各自的优缺点。将实测值和设计值进行了对比，对施工过程起一定的指导作用。 在斜拉桥的计算和设计中，确定成桥目标状态是一项至关重要的工作。本文对长兴吕山大桥进行了计算，，利用Midas Civil软件建立了全桥模型，采用影响矩阵法对全桥进行了分析。首先计算出未知荷载系数，然后利用索控制功能进行调索，通过多次索力的调整，最终得到了全桥的最优索力，即合理成桥索力。 获得斜拉桥的合理成桥状态至关重要，这将是今后桥梁领域研究的一个主要问题。相信可以得到一种更加有效地方法，使得斜拉桥结构和受力更加的合理。
[Abstract]:The internal force of the single-tower cable-stayed bridge and the alignment of the main bridge can be adjusted by the cable force of the cable, so the cable force of the cable-stayed bridge can be optimized to optimize the stress state of the cable-stayed bridge. When the stress system of cable-stayed bridge is determined, a set of cable forces can be found, that is, reasonable cable force, so that the cable-stayed bridge can reach a reasonable stress state. In the single broken tower cable-stayed bridge, the broken tower mainly affects the overall structural force of the cable-stayed bridge, so the reasonable cable force must ensure the stress state of the broken tower cable-stayed bridge. In this paper, two problems are studied: first, what is a reasonable bridge state; and second, how to adjust the cable force to get the bridge state. In this paper, the methods of determining the reasonable cable force of cable-stayed bridge are summarized, the principles of influence matrix method and minimum bending energy method are analyzed, these methods are compared, and their advantages and disadvantages are analyzed. The measured value is compared with the design value, which plays a certain guiding role in the construction process. It is very important to determine the target state of cable-stayed bridge in the calculation and design of cable-stayed bridge. In this paper, the Changxing Lushan Bridge is calculated, the whole bridge model is established by using Midas Civil software, and the influence matrix method is used to analyze the whole bridge. Firstly, the unknown load coefficient is calculated, and then the cable control function is used to adjust the cable. Through the adjustment of the cable force many times, the optimal cable force of the whole bridge, that is, the reasonable cable force, is obtained. It is very important to obtain the reasonable completion state of cable-stayed bridge, which will be a main problem in the field of bridge research in the future. It is believed that a more effective method can be obtained to make the structure and force of cable-stayed bridge more reasonable.
【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】：U448.27
本文编号：2492178
[Abstract]:The internal force of the single-tower cable-stayed bridge and the alignment of the main bridge can be adjusted by the cable force of the cable, so the cable force of the cable-stayed bridge can be optimized to optimize the stress state of the cable-stayed bridge. When the stress system of cable-stayed bridge is determined, a set of cable forces can be found, that is, reasonable cable force, so that the cable-stayed bridge can reach a reasonable stress state. In the single broken tower cable-stayed bridge, the broken tower mainly affects the overall structural force of the cable-stayed bridge, so the reasonable cable force must ensure the stress state of the broken tower cable-stayed bridge. In this paper, two problems are studied: first, what is a reasonable bridge state; and second, how to adjust the cable force to get the bridge state. In this paper, the methods of determining the reasonable cable force of cable-stayed bridge are summarized, the principles of influence matrix method and minimum bending energy method are analyzed, these methods are compared, and their advantages and disadvantages are analyzed. The measured value is compared with the design value, which plays a certain guiding role in the construction process. It is very important to determine the target state of cable-stayed bridge in the calculation and design of cable-stayed bridge. In this paper, the Changxing Lushan Bridge is calculated, the whole bridge model is established by using Midas Civil software, and the influence matrix method is used to analyze the whole bridge. Firstly, the unknown load coefficient is calculated, and then the cable control function is used to adjust the cable. Through the adjustment of the cable force many times, the optimal cable force of the whole bridge, that is, the reasonable cable force, is obtained. It is very important to obtain the reasonable completion state of cable-stayed bridge, which will be a main problem in the field of bridge research in the future. It is believed that a more effective method can be obtained to make the structure and force of cable-stayed bridge more reasonable.
【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】：U448.27
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