文档介绍：湖南大学
硕士学位论文
高墩大跨连续刚构桥的设计与研究
姓名:黄列夫
申请学位级别:硕士
专业:建筑与土木工程
指导教师:邵旭东;周立本
20070305
高墩大跨连续刚构桥的设计与研究
摘要
大跨高墩连续刚构桥因其在经济上的竞争力和施工上的方便性,在国内应用非常广
泛。但这种高墩结构在平衡悬臂施工阶段和成桥状态的稳定问题非常突出。本文以贵州
省的茂井特大桥为依托工程,围绕大跨高墩连续刚构桥的一个关键问题—稳定来展开研
究,主要完成了以下工作:
(1)对茂井大桥主要的设计特点进行了介绍,并对面内的主要问题进行了概括,介
绍了大桥的地质水文条件,并对不同桥墩刚度与上部结构的受力性能进行了大量的计算
分析,最终选取了合适的桥墩截面型式,并进行了结构的面内分析。
(2)介绍了国内外高墩稳定研究现状,论述了第一类稳定问题和第二类稳定问题的
实质性差别并总结了其求解方法。
(3)分析了高墩的薄壁板局部稳定问题;
(4)利用通用有限元程序Ansys,考虑几何和材料双重非线性的影响,以桥墩结构
在单边日照作用下的变形作为初始缺陷,,分
析结构在最大悬臂阶段和成桥最不利受力阶段下的第二类稳定。为了模拟桥墩结构的材
料非线性性能,bin40双线性弹簧单元模拟墩底塑性铰。分析得到了结构的荷载
位移曲线,其失稳机理为由二阶效应引起的失稳。
(5)最后对桥墩结构的非线性效应分别采用规范公式和通用程序进行了对比分析,
结果表明按照规范公式进行计算,其结果偏于安全。

关键词:薄壁高墩;刚构桥;稳定性;非线性;稳定承载力

IV
工程硕士学位论文
Abstract
The continuous rigid frame bridge with high piers monly built in China,because of
its advantages on economy and construction. However, the problem of stability, in cantilever
construction stage and in service stage, is very remarkable for the bridges with high piers.
Based on the MaoJing Bridge in GuiZhou province, this thesis focuses on the stability of the
continuous rigid bridge with high Piers during the construction of cantilever and the service
stage. The main research work is summarized as follows:
(1)First, the design characteristic of MaoJing bridge is introduced, some important
problem is discussed, the geological and hydrological condition are also introduced. A lot of
calculations are conducted in order pare the mechanical performance of superstructure
with different rigidity of pier. The last section type of pier are deduced.
(2)First, the existing research work on the stability of high piers had been introduced.
Then, the solution methods of the first type stability and the second type stability were
summarized in this thesis and the main difference between them was discussed.
(3)The local stability of plate is analyzed.
(4)Taking MaoJing Bridge for example, based on the fini