支架现浇预应力混凝土斜拉桥索力确定

发布时间：2018-06-26 22:06

本文选题：支架现浇斜拉桥 + 合理成桥索力　；参考：《合肥工业大学》2015年硕士论文

【摘要】：斜拉桥的内力分布好坏是衡量设计与施工优劣的重要标准,索力是影响斜拉桥受力性能的核心因素,具有“牵一索而动全桥”的特点,因此,斜拉桥索力合理确定与优化是斜拉桥设计和施工中的关键问题,本文将在已有研究成果的基础上,以环巢湖旅游大道上的支架现浇的杭埠河大桥为工程背景,采用影响矩阵的方法,确定杭埠河斜拉桥合理成桥索力与施工索力,论文研究具有重要的理论意义和工程实用价值。本文主要研究工作包括：1.采用有限元的方法,建立了杭埠河斜拉桥成桥和支架现浇施工阶段有限元模型,进行了静力和动力分析,对杭埠河斜拉桥成桥和施工阶段的静动力特性有了一个深刻了解。2.介绍了斜拉桥成桥索力确定的影响矩阵法和基于影响矩阵的综合法,采用这两种方法对比分析来确定杭埠河斜拉桥合理成桥索力,即分别以刚性支承连续梁状态、弯曲能量最小为目标,以满足某些控制截面内力和位移为约束条件,并综合考虑桥梁恒载、预应力等影响因素。结合有限元模型并利用本文方法可以很好地确定杭埠河大桥合理成桥索力。3.论述了确定斜拉桥合理施工索力的有效方法,基于影响矩阵的正装迭代法,根据杭埠河大桥支架现浇特点,本文采用基于影响矩阵的脱架系数法来确定施工索力,即利用脱架系数、有支架影响矩阵、无支架影响矩阵来修正系统影响矩阵,从而可大大提高计算效率。结合有限元模型和数值计算分析,利用该方法确定了杭埠河大桥合理施工索力。
[Abstract]:The internal force distribution of the cable-stayed bridge is an important criterion to measure the advantages and disadvantages of the design and construction. The cable force is the core factor affecting the mechanical performance of the cable-stayed bridge, which has the characteristics of "pulling one cable to the whole bridge". Therefore, the rational determination and optimization of cable force of the cable-stayed bridge is the key problem in the design and construction of the cable-stayed bridge. This paper will be based on the foundation of the existing research results. On the basis of the engineering background of the hang Bu River Bridge on the tourist Avenue in Chaohu, this paper adopts the method of influence matrix to determine the reasonable cable force and construction cable force of the hang Bu River cable-stayed bridge. The paper has important theoretical significance and practical value of engineering. The main research work of this paper is as follows: 1. the method of finite element method is used to establish Hangzhou. The static and dynamic analysis of the finite element model in the stage of cast-in-place construction of the port river cable-stayed bridge is carried out. The static and dynamic characteristics of the bridge and construction stage of the hang Bu River cable-stayed bridge have a profound understanding of the influence matrix method and the comprehensive method based on the influence matrix for the determination of the cable force of the cable-stayed bridge by.2., and the comparison between the two methods is adopted. The analysis is made to determine the reasonable bridge cable force of the hang Bu River cable-stayed bridge, that is, with the rigid support of the continuous beam state and the minimum bending energy as the objective, to satisfy the internal force and displacement of some control sections as the constraint conditions, and to consider the influence factors of the bridge constant load and the prestress, combined with the finite element model and using this method, it can well determine Hangzhou. The reasonable bridge cable force.3. of the port river bridge is an effective method to determine the reasonable construction cable force of the cable-stayed bridge. Based on the positive iteration method of the influence matrix, according to the feature of the support of the hang port bridge, this paper uses the deframe coefficient method based on the influence matrix to determine the construction cable force, that is to use the deframe coefficient, the support matrix and the no support effect. The matrix is used to modify the influence matrix of the system so that the calculation efficiency can be greatly improved. With the finite element model and the numerical analysis, the reasonable construction cable force of the hang Bu River Bridge is determined by this method.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.57

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