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Composite material shear key for steel-concrete combined structure

A combined structure and composite material technology, applied to bridge materials, bridge parts, bridges, etc., can solve the problems of discontinuous stress on studs, uneven stress on studs, and inability to fully utilize the shear resistance of studs. Achieve the effect of preventing peeling and enhancing shear strength

Active Publication Date: 2015-03-04
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no direct connection between the studs. When shearing, the stress on each stud is uneven, and the force on the studs is discontinuous, so the shear resistance of all studs cannot be fully utilized.

Method used

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  • Composite material shear key for steel-concrete combined structure
  • Composite material shear key for steel-concrete combined structure
  • Composite material shear key for steel-concrete combined structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as figure 1 , 4 , 5, 6, and 13 show that the present invention is a composite material shear key for a steel-concrete composite structure. The steel plate 1 is an orthotropic steel plate, the fiber grid 2 is a single-layer or multi-layer carbon fiber grid, the grid rib is 10 mm, the side length of the mesh is 90 mm, and the thickness is 5 mm. The steel block 3 is arranged along the edge in the fiber grid 2, and the steel block 3 is cemented or mechanically connected to the steel plate 1 in the form of no flange. The size of the steel block and the mesh is consistent, and the concrete is steel fiber concrete.

Embodiment 2

[0035] Such as figure 2 , 7 As shown in -10, the present invention is a composite material shear key for a steel-concrete composite structure, which is composed of a steel plate 1, a fiber grid 2, a steel block 3 and concrete 4. The steel plate 1 is an orthotropic steel plate, the fiber grid 2 is a single-layer carbon fiber grid, and the fiber grid 2 adopts a grid rib of 10mm, a mesh side length of 90mm, and a thickness of 5mm. The steel block 3 is arranged in a plum blossom shape in the fiber grid 3, the steel block 3 is cemented on the steel plate 1, the diameter of the nut is 100mm, and the concrete 4 is made of reactive powder concrete. The steel block 3 is 5 steel blocks with square flanges on both sides, 6 steel blocks with wedge-shaped flanges on both sides, 5 steel blocks with square flanges on four sides or 6 steel blocks with wedge-shaped flanges on four sides.

Embodiment 3

[0037] Such as image 3 , 11 , Shown in 12, 14-18, the present invention is a composite material shear key for a steel-concrete composite structure, the component is made up of a steel plate 1, a fiber grid 2, a steel block 3 and concrete 4. The steel plate 1 is an orthotropic steel plate, the fiber grid 2 is a single-layer carbon fiber grid, and the grids are cemented with connecting rods, and the fiber grid rib 2 adopts grid ribs of 15mm, mesh side length of 135mm, and thickness of 6mm. The steel blocks 3 are evenly arranged in the fiber grid 2, the steel blocks 3 are mechanically connected to the steel plate 1, the studs are welded on the steel plate 1, the steel blocks 3 are set on the pegs through the reserved holes, and a diameter larger than The nut with the reserved hole is fixed. The steel block 3 is 5 steel blocks with square flanges on both sides, 6 steel blocks with wedge-shaped flanges on both sides, 5 steel blocks with square flanges on four sides or 6 steel bl...

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Abstract

The invention discloses a composite material shear key for a steel-concrete combined structure. The composite material shear key comprises a steel plate, a fiber grating, steel blocks and concrete, wherein the fiber grating is glued on the steel plate; the steel blocks are arranged in grids of the fiber grating and are connected to the surface of the steel plate; the steel blocks are arranged in the fiber grating along the edge, or are in plum blossom-shaped arrangement or are uniformly arranged; the concrete is poured on the fiber grating; the steel blocks are steel blocks with flanges or steel blocks without flanges; the steel blocks are in glued connection or mechanical connection; the mechanical connection is that bolts are welded on the steel plates; the steel blocks sleeve the bolts through preserved holes and are fixed by screw caps of which the diameters are greater than the diameters of the preserved holes. According to the composite material shear key for the steel-concrete combined structure, peeling between the grating and the steel blocks and shearing damage are effectively prevented, and the shear strength of the steel-concrete combined structure is greatly enhanced; the composite material shear key is suitable for building of various steel bridgedeck structures.

Description

technical field [0001] The invention relates to the technical field of composite structures, in particular to a composite material continuous shear key capable of improving the shear resistance of the structure, and is especially suitable for composite bridge deck structures in bridge structures. Background technique [0002] In the traditional steel-concrete composite structure, studs are often used as shear connection keys to strengthen the combination of steel and concrete so that they can bear the force together. However, there is no direct connection between the studs. When shearing, the force on each stud is uneven, and the force on the studs is discontinuous, so the shear resistance of all the studs cannot be fully utilized. Contents of the invention [0003] The object of the present invention is to solve the problems existing in the prior art, and provide a composite material shear key for steel-concrete composite structures with high strength, good toughness and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/12
CPCE01D19/125E01D2101/30E01D2101/264E01D2101/266E01D2101/262
Inventor 方海徐欣刘伟庆祝露
Owner NANJING UNIV OF TECH
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