斜拉桥索梁锚固结构受力行为理论研究.docx

西南交通大学硕士学位论文 第1页
摘 要
斜拉桥索梁锚固结构区域受力集中、构造复杂,是控制设计的关键部位, 掌握索梁锚固结构的应力分布情况是十分重要的。。有限元分析的结果可以用于指导试验,同时有限元分析可以变化参数进行参数研究,以弥补试验的不足。建设中的广东湛江海湾大桥索粱锚固采用锚拉板结构。本文利用大型通用软件ANSYS对湛江海湾大桥锚拉板式索梁锚固结构的空间受力行为进行了理论上的分析。本文所作工作如下:
、应力分布、应力集中现象,以及改善应力分布、减小应力集中现象的一些措施,得到一些有益的结论,供桥梁设计者参考;
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(锚拉板与锚筒连接的焊缝根部的圆弧半径)对塑性区的分靠及初始屈服荷载的影响;
6。研究了锚拉板厚度的改变对塑性区的范围及初始屈服荷载的影响:
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通过本论文的工作,为今后类似索梁锚固结构的设计提供理论上的依据。
【关键词】 斜拉桥锚固区锚拉板结构有限元模型试验
ABSTRACT
The cable—girder anchorage zones of cable—stayed bridges,which bear giant cable forces and plicated structure,are keys to structure is important to know the stress distribution of anchorage zones only is the
model test a useful method to deal丽th this also the finite element
method is important to do with it before the model finite element method is able to improve the model test and make up the deficiency of Bay Bridge applies the Cable—girder anchorage with tensile anchor applied the general finite element program—ANSYS to analyze the Cable-girder anchorage with tensile anchor plate of Zhanjiang Bay content of the paper is as
follows:
mechanic behavior,stress distribution and stress concentration of anchorage zone are studied measures to reform stress distribution and to reduce stress concentration are useful conclusion is obtained.
and it is beneficial to the design ofbridges.
the cable tension,the stress distribution of Cable-girder anchorage with tensile anchor plate iS gained:
mechanic behavior of Cable—girder anchorage with tensile anchor plate is
gained;
the change of thicknCSS of deck the cable tension distribution iS investigated;
change of the distribution of plastic zone and the yield load which arc
affected