预制拼装混凝土桥面板设计

预制拼装混凝土桥面板设计(开题报告,论文14800字)
摘要
如今大量现役的混凝土桥梁或多或少出现了受损情况，普通的修复方式只是简单地除去受损的混凝土层，重新浇筑上新鲜的混凝土，这种方式除了费用比较高之外，对交通造成的影响也比较大。因此，预制拼装混凝土桥面板技术应运而生，该技术首先在上个世纪50年代的美国被使用，现在该技术最多被运用在钢—混凝土组合梁桥上。而预制桥面板与下部的钢梁的连接主要是通过剪力钉焊接得以实现，其中最常见的是后浇孔连接。这种连接方式是在预制桥面板上预留一个孔，然后将剪力钉或剪力钉群焊接在钢梁上，再将剪力钉或剪力钉群放置于孔内，最后浇注上混凝土封孔。本文采用有限元分析软件ANSYS建立预制拼装混凝土桥面板的一部分实体模型，采用后浇孔连接方式与梁相连，并模拟汽车在桥面上紧急制动对预制桥面板的影响，添加适当的约束条件后求解计算，读取相应的位移云图和内力图。之后改变荷载条件，得到相应的图与数据，多组数据相结合进行分析，查看汽车紧急制动所产生的荷载大小以及作用点对预制桥面板变形以及内力的影响，为预制桥面板设计和其在实际工程中的应用提供理论依据。
关键词：预制拼装混凝土桥面板；钢—混凝土组合梁桥；剪力钉；紧急制动 [资料来源：http://Doc163.com]

Abstract
Today, a large number of active concrete bridges are more or less damaged, the ordinary way of repair is simply to remove the damaged concrete layer, re-pouring fresh concrete. In addition to this cost is relatively high, the impact on traffic is also relatively large. Therefore, precast concrete deck panel technology came into being. The technology was first used in the United States in the 50s of last century, and now the technology is most widely used in steel-concrete composite beam bridges. The connection between the precast deck panel and the lower steel beam is mainly achieved by welding with shear studs, the most common of which is the post-pouring connection. The connection is provided with a hole in the precast deck panel, then the shear studs are welded to the steel beam, then the shear studs are placed in the hole, and finally a concrete seal is poured. This paper used finite element analysis software ANSYS to establish the precast concrete deck panel which is a part of the entity model. The deck panel was connected with the beam by the post-pouring connection, and simulated the impact of vehicles’ emergency brake on the precast deck panel. After the appropriate constraint conditions were added, the corresponding displacement nephogram and internal force diagram were read out. And then changed the load conditions, got the corresponding graph and data, and multiple sets of data was combined to analyze the impact to the precast deck panel deformation and internal forces by the size and the point of the emergency brake load, which provides a theoretical basis for the design of precast deck panel and its application in practical engineering.

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Key Words：precast concrete deck panel；steel-concrete composite beam bridges；shear studs；emergency brake
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目录
第一章绪论    1
1.1课题研究的背景    1
1.2课题研究的意义及目的    1
1.3预制拼装混凝土桥面板国内外研究现状    2
1.3.1国外研究现状    2
1.3.2国内研究现状    4
1.4课题研究内容    4
1.5预期目标    5
第二章钢－混凝土组合梁桥的剪力连接    6
第三章预制拼装混凝土桥面板模型建立    8
3.1 ANSYS简介    8
3.2有限元方法原理及求解过程    8

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3.3模型建立    9
3.3.1模型尺寸的拟定    9
3.3.2定义单元类型和材料属性    10
3.3.3几何模型的建立    11
3.3.4网格划分    11
3.3.5施加约束与荷载及求解    12
图3.4 整体有限元模型图    13
第四章求解结果分析    14
4.1ANSYS后处理    14
4.2静态分析    14
4.3结果处理分析    14
4.3.1位移云图分析    14
4.3.2内力图分析    17
第五章结论与展望    21
5.1结论    21
5.2未来研究方向及展望    21
参考文献    23
附录A：ANSYS模型前处理及加载部分命令流    25
附录B：其他三组荷载条件命令流    34
致谢    37 [资料来源：https://www.doc163.com]