The Analysis Of Steel Truss Girder Flexible Combination Of Arch Bridge And Research On Gusset Plate

Xiamen-Shenzhen Railway Department of Rongjiang Bridge,the main span of which is (110+220+220+110m), the steel truss girder with flexible arch combination system; The bridge span is the top one among the same type of bridge in the world. The bridge node structure is in the form of the integral node:the gusset plate assembled at the factory prior to welding, and then go down to the gusset plate between the "plug" and the main truss rod. The form of such node structure, which is strengthful and saving. The same time, some nodes of this bridge are special and their stress distribution is more complex due to the structural characteristics of the arch-girders and stringers-stiffening rib, For the structure of the bridge and the special background of the high-speed railway lane load, and in conjunction with the needs of the sub-project of the Ministry of Railways science and technology research and development programs, the thesis is about the following work:1. Described the characteristics of the steel truss-arch bridge, introduced the development of the domestic steel truss arch bridge, and summarizes the research development for the gusset plate.2. Based on linear elastic and small deformation theory, using general-purpose finite element software, established the model of Rongjiang King Bridges by finite element analysis software and carried out the construction phase and the operational phase numerical simulation analysis, the use of analysis and calculation of the subspace iteration method the bridge before the eighth order vibration characteristics of the data provided and Design Institute agreement to verify the reliability of the safety of the design and calculation model of this article.3. Real bridge node using thin cell finite element model and a linear static analysis, based on the principle of equivalence, the Task Force1:3model test results and the theoretical analysis results compared, check this article reliability. 4. To investigate the overall the secondary stress effect of the gusset plate, the overall structure of the nodes by the hinge mode and the overall rigid connection mode between the two different modes gusset plate mechanical effects were compared, obtained some of the secondary stress distribution law.5. For the the rigid boom with the main arch overall gusset plate connection outside mount node, consider the board posted outside the gusset plate-plate and board-bolt contact with the non-linear characteristics of the node nonlinear contact analysis,multi-row bolt group contact force development process and the force transmission law to carry out a preliminary exploration.112Figures,14Tables,53References...