Double-outrigger type cable beam anchoring structure of bridge steel box girder

Abstract

The invention discloses a double-outrigger type cable beam anchoring structure of a bridge steel box girder, comprising a steel box girder which is mainly formed by a top plate, a side plate, a side longitudinal web, a bottom plate and a transverse diaphragm plate. The double-outrigger type cable beam anchoring structure of the bridge steel box girder is characterized by also comprising an anchor box which is used for transferring the force of a stay cable to the steel box girder; a cable sleeve of the anchor box penetrates through the top plate; the body of the anchor box is located in the steel box girder; and two sides of the body of the anchor box are fixedly connected with the side plate and the side longitudinal web respectively. Through the double-outrigger type cable beam anchoring structure of the bridge steel box girder, the stress safety, the force transfer reliability and the fatigue resistance of the cable beam anchoring structure of the steel box girder are improved and the problem that the existing cable anchoring structures in common use have concentrated stress and overlarge local stress and fatigue stress is well overcome.

Description

technical field [0001] The invention relates to the technical field of bridge structures, in particular to a bridge steel box girder double pick type cable girder anchorage structure. technical background [0002] The connection structure of the cable-stayed steel box girder cable-stayed bridge and the steel girder (i.e., the cable-beam anchorage structure), as a structure that directly bears and transmits the force of the cable-stayed cables, is the most critical and complex stress-bearing structure of the steel box girder. one of the regions. [0003] According to the structural form, the cable beam anchorage structure of the steel box girder is generally divided into three types: lug plate type, anchor tie plate and anchor box. The lug-plate anchoring structure is a lug C protruding upward from the side longitudinal web of the main beam, and the cable D is anchored on the lug, and the pin-hinge connection is adopted, and the cable force is directly transmitted from the l...

AI Technical Summary

Problems solved by technology

[0006] The lug plate anchoring structure transmits the cable force directly to the side longitudinal web through the lug plate, and the side longitudinal web and lug plate bear a large force, especially the pin hole of the lug plate produces huge local stress and Fatigue stress amplitude, its static strength and fatigue strength are not easy to meet the design requirements

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