Novel horizontal and longitudinal connecting system for three-split type steel box girder

Abstract

The invention discloses a novel horizontal and longitudinal connecting system for a three-split type steel box girder, which comprises a middle steel box girder and side steel box girders respectively arranged on two sides of the middle steel box girder. The middle steel box girder and the side steel box girders are connected into a whole through a horizontal and longitudinal connecting system assembly,the horizontal and longitudinal connecting system assembly is in a continuous bending shape, and the bending part of the horizontal and longitudinal connecting system assembly is fixed with the middle steel box girder/the side steel box girders. According to the novel three-split type steel box girder horizontal and longitudinal connecting system structure, the longitudinal and horizontal force transmission efficiency can be remarkably improved, the size of a horizontal and longitudinal connecting system is reduced, the construction difficulty and precision of a pushing construction method and a cantilever assembly construction method are improved, the influence of vortex vibration of the three-split type steel box girder under the low wind speed can be reduced, the overlook aesthetic feeling of the structure is improved, and the transverse horizontal rigidity of the structure is increased. The system is reasonable in structure, novel in concept, good in comprehensive economy, high in practicability and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of steel box girder structures, and in particular relates to a novel horizontal longitudinal connection system for a three-part steel box girder. Background technique [0002] The split steel box girder is another important bridge section innovation after the closed box girder. It is generally called the "second generation steel box girder". Its main purpose is to improve aerodynamic performance and improve flutter performance. [0003] When the three-piece steel box girder is applied to a cable-stayed bridge, the longitudinal horizontal force (mainly the cable force) between the steel box girders needs to be transmitted through the horizontal longitudinal connection system to ensure the even distribution of the three-piece box girder cable force. The traditional "one"-shaped horizontal longitudinal connection system transmits the longitudinal horizontal force between steel box girders through the shear defo...

AI Technical Summary

Problems solved by technology

The traditional "one"-shaped horizontal longitudinal connection system transmits the longitudinal horizontal force between steel box girders through the shear deformation of the horizontal longitudinal connection system. The transmission efficiency is low, and the horizontal longitudinal connection system needs to be made into a large-sized box section to have Sufficient longitudinal shear stiffness

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