宽箱梁桥静动力响应分析模型与影响参数分析(任务书,开题报告,外文翻译,论文11000字)
摘要
随着国内建筑行业的进步，交通行业的飞速发展，城市中出现了大量的立交桥梁。城市桥梁因为地形，城市规划的影响，还要兼顾美观和通行量的要求，箱型截面形式的桥梁上部结构越来越受广大桥梁技术工程人员及投资者所青睐，而且大多数都是宽箱梁桥，宽箱梁桥在交通区域里大量出现。箱型截面的优点是稳定性比较好，抗扭的刚度大,在偏载的作用下，可以非常良好的受力。这种桥梁因为腹板间距较大，所以一般箱壁薄，横向的翼缘比较宽。在设计结构的过程中，薄壁结构因为受力情况比较复杂，截面不仅有剪力，还存在着翘曲、扭转和畸变等作用。因为多室宽箱梁的特殊情况，已经无法用现有的单箱单室箱梁理论对其进行有效的计算。所以需要找到一种适合单箱多室的箱梁的有效计算方法。在了解了单箱多室宽箱梁桥受力的特点，通过现在已有的结构分析方法。运用梁格法作为基础，借助有限元分析软件，对桥梁在静动力作用下的受力情况反应等做出一些归纳总结和分析。
本文针对宽箱梁桥的发展现状以及施工方面进行了比较具体的阐述，并以此作为基础，确定了本文的主要研究内容，介绍了梁格模型的理论方面的内容。
以150 m的三跨连续梁为例，利用Midas civil建立0º、10º、20º、30º、40º的不同角度的梁格模型比较进行动力特性分析.
以及在汽车荷载作用下进行内力分析，结合梁格理论，得出宽箱梁桥在静动力作用下的一些反应，并对影响参数做出一些研究。
关键词：宽箱梁桥、梁格法、MIDAS/CIVIL、静动力参数分析。
Abstract
With the advancement of the domestic construction industry and the rapid development of the transportation industry, a large number of interchange bridges have emerged in the city.Due to the influence of topography and urban planning, urban bridges must also take into account the requirements of aesthetics and traffic volume. The upper structure of bridges in the form of box sections is increasingly favored by bridge technology engineers and investors, and most of them are wide boxes. Beam bridges and wide box girder bridges appear in large numbers in the traffic area.The advantage of the box section is that the stability is better, the torsion stiffness is large, and under the action of the eccentric load, the force can be very good.Because of the large spacing of the webs, such bridges generally have a thin wall and a wide lateral flange.In the process of designing the structure, the thin-walled structure is complicated due to the force, and the cross-section not only has shearing force, but also has the functions of warping, torsion and distortion.Because of the special case of multi-chamber wide box girder, it has been impossible to effectively calculate it with the existing single-box single-chamber box girder theory.Therefore, it is necessary to find an effective calculation method for a box girder suitable for a single box and multiple chambers.Understand the characteristics of the single-box multi-chamber wide box girder bridge, through the existing structural analysis methods.Using the beam grid method as the basis, with the help of the finite element analysis software, some inductive summarization and analysis of the response of the bridge under the action of static and dynamic forces are made.
In this paper, the development status and construction aspects of the wide box girder bridge are described in detail. Based on this, the main research contents of this paper are determined, and the theoretical aspects of the beam lattice model are introduced.
(1) Taking a three-span continuous beam of 150m as an example, the dynamic characteristics of the different angles of 0°, 10°, 20°, 30°and 40° were established by Midas civil.
(2) And the internal force analysis under the action of vehicle load, combined with the beam theory, some reactions of the wide box girder bridge under static and dynamic forces are obtained, and some research on the influence parameters is made.
Key words: wide box girder bridge, beam grid method, midas/civil, static and dynamic parameters analysis.
目录
第一章绪论 1
1.1发展历程 1
1.2研究现状 2
1.3箱梁桥的力学特点 3
1.3.1箱梁桥的结构特点 3
1.3.2箱梁桥的受力特点 3
1.4梁格法 4
1.5本文的研究内容 5
第二章模型建立方法 6
2.1建模之前所做的准备工作 6
2.1.1桥梁简介 6
2.2梁格模型 7
2.2.1梁格模型模型简介 7
第三章静力特性分析 8
3.1参考规范和工程概况 8
3.2宽箱梁桥梁格模型静力特性 9
3.3宽箱梁桥梁格模型静力特性对比 20
第四章动力特性分析 21
4.1宽箱梁桥梁格模型动力特性 21
4.2宽箱梁桥模型动力模态分析 21
4.2.1 0°宽箱梁桥梁格模型 21
4.2.2 10°宽箱梁桥梁格模型 23
4.2.3 20°宽箱梁桥梁格模型 25
4.2.4 30°宽箱梁桥梁格模型 26
4.2.5 40°宽箱梁桥梁格模型 28
4.2.6 宽箱梁格模型特征值汇总表 29
4.3 不同模型的比较 31
4.3.1梁格模型数据比较 32
第五章结论与展望 33
5.1结论 33
5.1.2静力响应结论总结 33
5.1.1动力响应结论总结 33
5.2需要改进之处和进一步研究的建议 34
5.2.1 需要改进的地方 34
5.2.2进一步研究的建议 34
参考文献 35
致谢 37
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