【作者】 刘应贵；

【导师】 李乔； 黄道全；

【作者基本信息】 西南交通大学 ， 建筑与土木工程， 2003， 硕士

【摘要】 科学技术的快速发展和交通需求的增长，为桥梁结构向高等级、大跨径发展提供了要求和可能，斜拉桥作为大跨径桥梁的主要形式之一，近年来得到了日益广泛的应用。本文以四川省宜宾市跨越金沙江的中坝桥为背景。在收集了国内有关斜拉桥索塔锚固区预应力体系应用情况资料的基础上，对小半径大吨位环向预应力体系在工程实践中的应用进行了理论分析和足尺寸模型试验研究。论文首先介绍了国内现阶段对该问题的一些研究成果，然后从理论上分析了小半径大吨位环向预应力体系在计算预应力损失方面的特点和造成张拉伸长量偏大且实测的数据离散性较大的原因，并采用国际权威的有限元分析软件——ANSYS从理论上进行分析和索塔锚固区最不利节段的足尺寸模型试验进行校验。 本论文从理论分析和试验两方面对小半径大吨位环向预应力体系在斜拉桥索塔锚固区的工作性能进行了阐述，进而加深了认识，得出了一些普遍的结论，这些可以作为今后制订相关规范等的参考，同时对解决设计和施工中的具体问题具有现实意义。更多还原

【Abstract】 With the development of technology and the increasing requirement of traffic, bridge class will be higher and bridge span is longer. Cable-stayed bridge is a main style of long span bridge, and is widely applied in practice more and more. Zhong-Ba Brdige across Jin-Sha-River in Sichuan YiBin is taken as an engineering example in this thesis. On basis of collecting information about the application of prestressing system to anchorage zone of pylon for cable-stayed bridge, theoretical analysis and full-scale mode test are carried out to research the application of circular prestressing system which radius is small and prestressing force is strong. Firstly, the domestic researches, which have been reported, are introduced. Then the characteristic of the system in estimation of prestressing losses is analyzed by theoretical method, and the reasons that the elimination of tendon is large and test results are not consistent are pointed. Using FEM software ANSYS, anchorage zone of pylon are analyzed. The analysis result is compared with that of full-scale model test.In this thesis, theoretical analysis and full-scale mode test are carried out to research the application of circular prestressing system. Some general conclusions obtained can be regarded as the reference of related codes. The research is useful in the structural design and construction practices.更多还原