广佛环线钢桁—槽型梁组合结构桥设计研究

发布时间：2018-03-15 17:38

本文选题：钢桁-槽型梁组合结构桥　切入点：混凝土　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：结合广佛城际项目佛山西站至广州南站段,在镇北村立交路口处立交净空受线路标高控制,另该段线路走行在城镇化程度较高的地区,设计中需考虑城市景观、降低噪音的要求。经多方案比选,采用一孔计算跨径为50m的钢桁-槽型梁组合结构桥。针对该结构的构造、受力特点开展了一系列的计算、研究工作。本文首先系统地通过工程类比、计算分析等方法拟定钢桁-槽型梁组合结构主要构件和结构尺寸。其次,针对不同的目标,进行了平面杆系有限元分析、空间梁—板单元有限元分析和三维实体单元有限元分析。并进行了车桥耦合动力仿真分析,表明该结构有良好的动力特性。再次,按照刚性节点承受全部的弯矩剪力,轴力由混凝土弦杆承受的原则进行设计。并以此为基础对节点构造方案进行了认真研究,提出了分离式耳板式节点为推荐方案并进行缩尺节点模型试验,验证了节点构造的可行性。最后,通过对广佛城际实桥施工工艺的研究,制定了组合桁梁相关的工艺要求和质量控制措施。
[Abstract]:In connection with the section between Foshan West Railway Station and Guangzhou South Railway Station, the clearance at the intersection of Zhenbei Village Interchange is controlled by the line elevation. In addition, this section of the line runs in areas with a higher degree of urbanization, so the urban landscape should be taken into account in the design. Requirements for noise reduction. Through comparison and selection of multiple schemes, a single hole is used to calculate the steel truss-groove beam composite structure bridge with span of 50 m. A series of calculations are carried out according to the structural characteristics of the structure, In this paper, the main components and structural dimensions of steel truss-groove beam composite structure are systematically worked out by means of engineering analogy, calculation and analysis. Secondly, the finite element analysis of plane bar system is carried out for different targets. Space beam-plate element finite element analysis and three-dimensional solid element finite element analysis. The vehicle-bridge coupling dynamic simulation analysis shows that the structure has good dynamic characteristics. Thirdly, according to the rigid joints bear all the moment shear force, The axial force is designed by the principle of bearing the concrete chord. Based on this, the construction scheme of the joint is studied carefully, and the separate ear-plate joint is proposed as the recommended scheme and the model test of the scale joint is carried out. The feasibility of the joint construction is verified. Finally, through the study of the construction technology of the real bridge between Guangfo city, the related technical requirements and quality control measures of the composite truss beam are established.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U442.5

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