預應力連續(xù)剛構—鋼管混凝土拱組合體系結構行為分析
[Abstract]:Bridge is a kind of building built by people in order to cross mountain stream, bad geology or meet other traffic needs in production and life. Prestressed continuous rigid-frame-concrete-filled steel tube arch bridge is an important type of bridge. It combines the characteristics of arch bridge and rigid frame bridge. It has the advantages of large span ability, good durability, convenient construction (no system transformation) and beautiful appearance. It is more adaptable (suitable for building high and flexible piers in valleys and rivers) and does not need large supports and many other advantages, showing good development momentum in bridges. In this paper, the prestressed continuous rigid-frame-concrete-filled steel tube arch bridge is taken as the research object, and the structural behavior of the composite system of beam and arch of the bridge is analyzed. The main contents of this paper are as follows: (1) the development of arch bridges in China, the types and characteristics of arch composite bridges are summarized. The advantages, problems and engineering background of special-shaped arch and rigid frame composite beam bridge. (2) finite element modeling of prestressed continuous rigid-frame-steel tubular arch bridge, relevant standards and codes for modeling reference, and relevant technical specifications for use. Relevant materials used. In this paper, midas Civil finite element software is used to simulate the three-dimensional modeling and analysis of bridge. (3) static structure analysis of prestressed continuous rigid-frame-concrete filled steel tube arch bridge is carried out, and the bearing capacity of prestressed continuous rigid frame-steel tube arch bridge is analyzed. In normal use, transient stress analysis and stress analysis of steel box girder arch ring of bridge, static analysis of bridge end beam is also made. (4) Prestressed continuous rigid frame-concrete filled steel tube arch bridge is analyzed by eigenvalue analysis. The subspace iteration method and Ritz vector method are used to compare and analyze the eigenvalues of bridges with or without concrete filled steel tube arch. (5) the response spectrum analysis of prestressed continuous rigid frame-concrete filled steel tube arch bridge after arch removal is analyzed. In this paper, the model of concrete-filled steel tube arch in special-shaped arch and rigid frame composite beam bridge is established, and the structural behavior is analyzed, which provides a reference for the research of similar bridges in the future.
【學位授予單位】:西華大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:U441
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