独塔斜拉桥牵索挂篮有限元分析

发布时间：2018-07-01 20:02

本文选题：独塔斜拉桥 + 悬臂施工法　；参考：《合肥工业大学》2014年硕士论文

【摘要】：随着桥梁研究理论的发展和工程实际的需要,我国大跨径桥梁的设计和施工技术已经步入到一个崭新的阶段，目前我国已经建造了包括悬索桥、斜拉桥在内的大量大跨径桥梁。作为大跨度桥梁悬臂施工中的关键设备,挂篮也在进行着不断的发展和创新；当今新型挂篮的要求比传统挂篮要高，要求其更加移动灵活轻型化、装拆方便、稳定性好、安全性能高、变形小等。本文首先回顾了国内外斜拉桥及其施工方法的发展和现状，重点阐述了新型挂篮——牵索挂篮的原理和特点。然后，以涡河三桥——水滴型钢混组合塔独塔斜拉桥作为工程背景，采用MIDAS/CIVIL有限元程序建立了涡河三桥全桥有限元模型，探析了挂篮自重大小对悬浇桥梁施工阶段受力特性的影响，详细对比分析了在不同挂篮自重比（挂篮重量与标准梁段重量比）下的悬浇桥梁结构在不同施工阶段的截面应力和结构位移的变化情况，并分析计算得出该工程中所使用牵索挂篮自重取值的合理范围；随后，建立了该工程背景中的牵索挂篮有限元模型，并对该挂篮的主体结构构件进行了计算分析；最后，，以挂篮自重对桥梁主梁的影响以及挂篮主体构件的计算结果为原则，对本工程的牵索挂篮的主体结构构件进行了轻型化设计，以便更加合理地确定涡河三桥施工挂篮的最终尺寸，为该桥的顺利施工提供参考意见。研究结果表明，本文分析结果将对涡河三桥的现场施工监测和控制工作有一定的帮助，同时也可为同类型桥梁的设计和施工提供了相关参考。
[Abstract]:With the development of bridge research theory and the need of engineering practice, the design and construction technology of long-span bridges in China has entered a new stage. At present, a large number of long-span bridges, including suspension bridges and cable-stayed bridges, have been built in China. As the key equipment in the cantilever construction of long-span bridges, the hanging basket is developing and innovating constantly, and the requirement of the new type of hanging basket is higher than that of the traditional hanging basket, which requires it to move more flexibly and light, to install and disassemble conveniently, and to have good stability. High safety performance, small deformation and so on. This paper first reviews the development and present situation of cable-stayed bridge and its construction methods at home and abroad, and expounds the principle and characteristics of a new type of cable-stayed bridge. Then, the finite element model of the whole bridge is established by using Midas / CIVIL finite element program, which is based on the engineering background of the third bridge of the Huohe River, which is composed of a steel concrete composite tower and a single tower cable-stayed bridge. In this paper, the influence of the weight of hanging basket on the mechanical characteristics of cantilever bridge in construction stage is analyzed. The variation of cross-section stress and structural displacement of cantilever bridge structure under different weight ratio of hanging basket weight to standard beam segment in different construction stage is compared and analyzed in detail. Then, the finite element model of the suspension basket in the background of the project is established, and the main structural components of the hanging basket are calculated and analyzed. Based on the influence of the weight of the basket on the main girder of the bridge and the calculation result of the main member of the hanging basket, the light design of the main structure of the cable hanging basket in this project is carried out. In order to more reasonably determine the final size of the construction basket for the construction of the third Bridge, and provide reference for the successful construction of the bridge. The results of the study show that the results of this paper will be helpful to the monitoring and control of the construction of the third Bridge, and can also provide some reference for the design and construction of the same type of bridges.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.27

【参考文献】