【作者】 余支福；

【导师】 李传习； 夏桂云；

【作者基本信息】 长沙理工大学 ， 桥梁与隧道工程， 2008， 硕士

【摘要】 自锚式悬索桥以其造型美观、经济、适应性强等优点,越来越受到工程界的青睐,在国内外,已有多座自锚式悬索桥建成或处在建造中。主缆锚固区是自锚式悬索桥的关键部位,主缆的集中力将通过这一部位传递到主梁上使锚固区的受力状态十分复杂。因此,自锚式悬索桥主缆锚固区节段受力性能分析一直受到桥梁界的瞩目,主缆锚固区也是自锚式悬索桥设计和施工的难点和关键。本文以广州市猎德大桥为背景,对主缆锚固区节段进行详尽的理论分析和可靠的1:4大比例模型试验研究。主要工作和成果如下:(1)介绍了自锚式悬索桥的发展历史和国内外的应用现状,总结了自锚式悬索桥的构造特点和受力特征,并分类总结了国内外典型自锚式悬索桥的锚固构造。(2)介绍了国内锚固结构的试验,并对试验研究的成果进行了探讨,总结了试验的经验和规律,指出了试验研究存在的问题和发展趋势。(3)利用ANSYS软件对主缆锚固区节段实桥和试验模型进行详尽的空间有限元分析,考察锚固区的应力分布和变形状况。(4)进行了主缆锚固区节段的模型试验,明确该节段的实际受力和变形情况,并将试验结果和理论分析结果进行了比较,从而验证理论分析的准确性,检验设计的安全性和可靠性,同时也为大桥的施工提供了直接指导。更多还原

【Abstract】 Self-anchored suspension bridges are increasingly appreciated by engineers for their aesthetic look, low cost and high adaptability. Many self-anchored suspension bridges have been completed or are in construction in the world. The anchorage zone of main cable is a key part for self-anchored suspension bridges, where the concentrated force of main cable will be transferred to the girder that make the strength state very complicated in this area. Therefore, analysis of strength performance at anchorage zone segment of self-anchored suspension bridge main cable has been attracted attention in bridge engineering all the time and anchorage zone of main cable is also the difficult and important part in designing and constructing of self-anchored suspension bridges. Based on Lie De Bridge at GuangZhou, clear numerical analysis and reliable large scale(1:4) model test for anchorage zone of main cable on girde were carried out in this paper. The main works and results in this paper is described as follows:(1) This paper introduces phylogeny and application actuality inland and abroad, summarizes the construction and forcing charactertistic. Also, the typical anchorage structures inland and abroad are summarized.(2) This paper introduces model tests of anchorage structures inland, discusses the harvest of experimental research, summarizes the experience and rule of model tests, and indicates the existed problems and developing trend of experimental research.(3) This paper utilizes ANSYS to analyze the anchorage zone segment of main cable in the actual bridge and experimental model, and investigate stress distribution and deformation at the area.(4) Model test of the anchorage zone segment of main cable was done to clear the strength performance and deformation at the segment. Through comparison of the experiment results and the finite element analysis result of the model, the correctness of theoretical analysisi is verified and it is validates that this anchorage system is safe and reliable. At the same time the results can direct the construction of the bridge.更多还原