考虑施工误差的系杆拱桥吊杆索力分析研究

发布时间：2018-05-01 22:51

本文选题：系杆拱桥 + 刚性支承连续梁　；参考：《中南大学》2014年硕士论文

【摘要】：系杆拱桥具有跨越能力强、整体自重小、经济美观等特点,在工程中得到广泛应用。系杆拱桥由拱肋、主梁和吊杆三部分组成。吊杆作为连接主梁和拱肋的传力构件,其张拉力的变化直接影响结构内力分配,因此确定合理的吊杆索力至关重要。本文以南昌市九龙大道立交桥为工程背景,研究确定九龙大道立交桥合理成桥索力,以及考虑施工误差情况下合理施工状态的吊杆张拉力分布,主要工作和研究成果如下： 1.回顾系杆拱桥的发展历史和研究现状,介绍了其结构和受力特点,阐述了系杆拱桥合理成桥状态和合理施工状态的概念。 2.分析用刚性支承连续梁状态作为系杆拱桥合理成桥状态的可行性,提出了以主梁关心截面的位移作为索力调整的目标函数,结合影响矩阵法确定系杆拱桥合理成桥索力的方法。 3.利用正装分析法对施工各个阶段进行仿真计算分析,为了使仿真计算模型更好的模拟实际施工,考虑一定的施工误差,提出了以各阶段吊杆索力为性能控制目标,结合影响矩阵法确定系杆拱桥合理施工索力的方法。 4.提出的确定合理成桥索力方法和合理施工索力方法简单、方便,同时考虑了施工误差,使理论计算更接近施工现场实际情况。该方法用于南昌九龙大道立交桥吊杆索力调整的现场施工,结果表明本文的索力调整方法切实可行,对系杆拱桥的吊杆张拉施工具有指导意义。
[Abstract]:Tied arch bridge is widely used in engineering because of its strong span ability, small overall weight, economic beauty and so on. Tied arch bridge is composed of arch rib, main beam and suspender. As the force transfer member connecting the main beam and arch rib, the change of the tension directly affects the distribution of the internal force of the structure, so it is very important to determine the rational cable force of the suspender. Taking the Jiulong Avenue overpass of Nanchang City as the engineering background, this paper studies and determines the rational cable force of the Jiulong Avenue overpass and the distribution of the tension distribution of the suspender under the reasonable construction condition considering the construction error. The main work and research results are as follows: 1. This paper reviews the development history and research status of tied arch bridge, introduces its structure and stress characteristics, and expounds the concept of reasonable bridge state and reasonable construction state of tied arch bridge. 2. This paper analyzes the feasibility of using the state of rigid supported continuous beam as the reasonable bridge state of tied arch bridge, and puts forward a method to determine the rational cable force of tied arch bridge by using the displacement of the main beam concerned section as the objective function of cable force adjustment and the method of influence matrix. 3. In order to make the simulation model better simulate the actual construction and consider the certain construction error, the performance control goal of the cable force of the suspenders in each stage is put forward. The method of determining the rational construction cable force of tied arch bridge with influence matrix method. 4. The proposed method is simple and convenient to determine the rational cable force of the bridge and the reasonable construction cable force. At the same time, the construction error is taken into account so that the theoretical calculation is closer to the actual situation of the construction site. The method is applied to the field construction of cable force adjustment of suspension rod of Jiulong Avenue flyover in Nanchang. The results show that the method of cable force adjustment in this paper is feasible and has guiding significance for the construction of suspender tension of tied arch bridge.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.225

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