Hollow tube flange composite beam provided with internal and external stiffening ribs

Abstract

The invention relates to a hollow tube flange composite beam provided with internal and external stiffening ribs. A web is provided between an upper flange and a lower flange, an I-shaped beam is thus formed, the external stiffening ribs are arranged on the web perpendicularly, a top plate is arranged on the top of the upper flange, the upper flange is arranged as a hollow tube or both the upper flange and the lower flange are arranged as hollow tubes, the internal stiffening ribs are arranged in the hollow tubes or the hollow tubes are filled with a foaming steel material, the internal stiffening ribs and the external stiffening ribs are positioned on the same cross section, and the upper flange and the top plate are connected by shear connectors. The local buckling problem of the upper flange can be effectively controlled by the internal and external stiffening ribs, the construction process is simplified, security and stability at the stages of structure construction and use are guaranteed, the advantages of materials of the steel-concrete composite structure are given full play, the construction period is short, the dead-weight of the structure is small, the building height is small, the material properties of steel and concrete can be fully embodied, and the hollow tube flange composite beam provided with the internal and external stiffening ribs has better application prospects when compared with traditional I-shaped composite beams.

Description

Technical field [0001] The invention belongs to the technical field of steel-concrete composite structure bridges, and particularly relates to an internal-external stiffened hollow pipe flange composite beam. Background technique [0002] Steel-concrete composite structure bridges are generally connected by the upper flange and lower flange through the web to form an I-beam structure. In order to enhance the strength and stability of the structure, the web is welded with stiffeners and the upper flange, lower flange The flange structure is appropriately improved, and the upper flange steel plate of the I-beam is replaced with the inner concrete pipe flange. However, the inventor found that the inner concrete pipe flange has the following problems in the construction during the further research and development process: It is not easy to compact; the connection structure of the flange of the filled concrete pipe is complicated and the construction is difficult; new structures and n...

AI Technical Summary

Problems solved by technology

[0002] Steel-concrete composite structure bridges are generally formed by connecting the upper and lower flanges through the web to form an I-shaped beam structure. In order to enhance the strength and stability of the structure, stiffeners are welded on the web and the upper and lower flanges are connected The structure of the flange is appropriately improved, and the steel plate on the upper flange of the I-beam is replaced by the inner-filled concrete pipe flange. However, the inventor found the following problems in the construction of the inner-filled concrete pipe flange during further research and development: the inner-filled concrete pouring It is not easy to be compacted; the connection structure of the inner concrete pipe flange is complex and difficult to construct; new structures and new processes need to be proposed to ensure the mechanical performance at the connection position

[0003] At present, there are relatively few reports on this in the literature at home and abroad, and there are no effective technical measures for improvement.

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