大跨度钢桁斜拉桥施工控制关键技术研究
发布时间：2019-01-03 21:46
【摘要】：近些年来随着板桁梁桥和斜拉桥的发展，一种新型的桥梁形式—板桁斜拉桥应运而生。它继承了板桁梁桥与斜拉桥的共同优点，有着较好的适用性能，尤其在大跨度桥梁方面，有着较高的竞争价值，这也是国内外大跨度板桁梁斜拉桥得以快速发展的重要原因。为保证这种大跨度桥梁建设的安全性，施工监控是必不可少的一个重要环节。本文以在建铜陵公铁两用长江大桥为工程背景，针对该施工监控中的索力控制等关键技术进行了研究，主要内容如下： （1）有限元模型的建立。依托铜陵公铁两用长江大桥的工程背景，在广泛吸收前人研究成果的基础上，进一步探讨了在大跨度板桁斜拉桥模型建立过程中的关键问题，包括桥面系的模拟、索塔的模拟、索的模拟、边界条件的模拟等。 (2)有限元模型数据对比分析。用Midas2011和TDV2008有限元软件建立了该桥的有限元模型，并与设计单位3Dbridge模型进行了数据对比分析，结果表明TDV和3Dbridge在该桥的有限元计算方面较Midas准确； （3）钢绞线索索力均匀性控制技术。基于等值张拉法原理，，得出铜陵桥钢绞线索索力均匀性控制方案，实现了钢绞线索均匀性的控制目标，证明了智能张拉系统的实用性和可靠性； （4）钢绞线索索力大小控制技术。在对比分析了铜陵桥所采用的各种索力测试方法优缺点的基础上，通过实测数据和精确的计算分析，得出振动频率法在该桥索力测试中占有较大优势的结论。
[Abstract]:In recent years, with the development of slab-truss bridge and cable-stayed bridge, a new type of bridge, plate-truss cable-stayed bridge, emerges as the times require. It inherits the common advantages of slab-truss bridge and cable-stayed bridge, and has good applicability, especially in long-span bridges, which has a high competitive value, which is also an important reason for the rapid development of long-span cable-stayed bridges with slab truss beams at home and abroad. In order to ensure the safety of the long-span bridge construction, construction monitoring is an essential important link. In this paper, based on the construction of Tongling Bridge of the Yangtze River, the key technologies such as cable force control in the construction monitoring are studied. The main contents are as follows: (1) the establishment of finite element model. Based on the engineering background of Tongling Bridge, based on the extensive absorption of the previous research results, the key problems in the process of establishing the model of large-span plate-truss cable-stayed bridge are further discussed, including the simulation of bridge deck system and the simulation of cable tower. Simulation of cables, boundary conditions, etc. (2) comparison and analysis of finite element model data. The finite element model of the bridge is established by using Midas2011 and TDV2008 finite element software, and compared with the 3Dbridge model of the design unit. The results show that TDV and 3Dbridge are more accurate than Midas in the finite element calculation of the bridge. (3) the control technology of cable force uniformity. Based on the principle of equivalent tension method, the control scheme of cable force uniformity of steel strands in Tongling Bridge is obtained. The control goal of cable uniformity is realized, and the practicability and reliability of intelligent tension system are proved. (4) Cable force control technology of steel strand. On the basis of comparing and analyzing the merits and demerits of various cable force testing methods used in Tongling Bridge, it is concluded that the vibration frequency method has a great advantage in the cable force test of the bridge through the measured data and accurate calculation and analysis.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27;U445
本文编号：2399908
[Abstract]:In recent years, with the development of slab-truss bridge and cable-stayed bridge, a new type of bridge, plate-truss cable-stayed bridge, emerges as the times require. It inherits the common advantages of slab-truss bridge and cable-stayed bridge, and has good applicability, especially in long-span bridges, which has a high competitive value, which is also an important reason for the rapid development of long-span cable-stayed bridges with slab truss beams at home and abroad. In order to ensure the safety of the long-span bridge construction, construction monitoring is an essential important link. In this paper, based on the construction of Tongling Bridge of the Yangtze River, the key technologies such as cable force control in the construction monitoring are studied. The main contents are as follows: (1) the establishment of finite element model. Based on the engineering background of Tongling Bridge, based on the extensive absorption of the previous research results, the key problems in the process of establishing the model of large-span plate-truss cable-stayed bridge are further discussed, including the simulation of bridge deck system and the simulation of cable tower. Simulation of cables, boundary conditions, etc. (2) comparison and analysis of finite element model data. The finite element model of the bridge is established by using Midas2011 and TDV2008 finite element software, and compared with the 3Dbridge model of the design unit. The results show that TDV and 3Dbridge are more accurate than Midas in the finite element calculation of the bridge. (3) the control technology of cable force uniformity. Based on the principle of equivalent tension method, the control scheme of cable force uniformity of steel strands in Tongling Bridge is obtained. The control goal of cable uniformity is realized, and the practicability and reliability of intelligent tension system are proved. (4) Cable force control technology of steel strand. On the basis of comparing and analyzing the merits and demerits of various cable force testing methods used in Tongling Bridge, it is concluded that the vibration frequency method has a great advantage in the cable force test of the bridge through the measured data and accurate calculation and analysis.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27;U445
【参考文献】
相关期刊论文 前3条
1 林元培;卡尔曼滤波法在斜拉桥施工中的应用[J];土木工程学报;1983年03期
2 任伟新;陈刚;;由基频计算拉索拉力的实用公式[J];土木工程学报;2005年11期
3 宋一凡,贺拴海;斜拉索动力计算长度研究[J];中国公路学报;2001年03期
本文编号：2399908
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