Novel composite beam of tooth-shaped perforated steel plate connecting piece with transverse steel plate

Abstract

The invention discloses a novel composite beam of a tooth-shaped perforated steel plate connecting piece with a transverse steel plate. The novel composite beam comprises a steel beam, the tooth-shaped perforated steel plate with the transverse steel plate, a concrete plate, penetrating steel bars, distribution steel bars and concrete tenons. The tooth-shaped perforated steel plate with the transverse steel plate is welded on the I-shaped steel beam to penetrate through the steel bar, so that the perforated steel plate connecting piece is formed, the concrete wing plate is connected with the steel beam, meanwhile, the transverse steel plate above the tooth-shaped perforated steel plate can resist pressure from the upper portion, and the force transmission path is changed through the arrangement mode. And the load can be transferred more reasonably. The combined beam is simple in structure, a combined beam structure form of a novel connecting piece is provided, the connecting mode is convenient and simple, the mechanical advantages of steel and concrete are fully utilized, meanwhile, reliable and effective transmission of shearing force between the steel and the concrete is guaranteed, and the upper transverse steel plate can better share loads; compared with a traditional welding stud, the perforated plate connecting piece has higher shear bearing capacity and has good mechanical performance to resist longitudinal shear force and transverse lifting force.

Description

Technical Field

[0001] The invention relates to a novel steel-concrete composite beam with a toothed perforated plate connector with a transverse steel plate. Background Art

[0002] Steel-concrete composite beam is a new type of structure developed based on steel structure and concrete structure. It makes full use of the advantages of the two materials, better avoids the problems of concrete cracking and steel beam instability, makes it have greater rigidity, and can also reduce the weight of the structure. The two are connected into a whole through shear connectors. It has the advantages of reasonable force, saving steel, energy saving and environmental protection. It has significant advantages in the field of small and medium span bridges.

[0003] At present, the commonly used composite structure bridges mainly connect concrete and steel into a whole through bolts, perforated plates or steel sections, so that the two materials can work together. However, various shear connectors have obvious disadvantages. For example, a sufficient number of bolts are required to meet the bearing capacity requirements, which will increase the welding workload of the construction. When perforated plate connectors are used, the tensile resistance of the composite beam is average. When ordinary concrete is used, its bearing capacity increases with the increase of concrete strength and plate thickness, which will cause the concrete wing plate in the composite beam to become bulky.

[0004] Therefore, in view of these problems, the present invention proposes a novel composite beam with a toothed perforated plate connector having a transverse steel plate. Summary of the invention

[0005] In view of the problem of composite beam properties caused by using different shear connectors, the present invention proposes a new composite beam with a toothed perforated plate connector with a transverse steel plate, which can reduce the construction difficulty and make the mechanical properties of the composite beam have sufficient reliability.

[0006] The present invention is achieved through the following technical solutions:

[0007] A novel composite beam with a bent toothed perforated steel plate connector comprises a concrete slab, a steel beam, a toothed perforated steel plate with a transverse steel plate, a concrete tenon, a through steel bar, a transverse steel bar and a longitudinal steel bar. The perforated plate connector is formed by welding the bent toothed perforated steel plate above the upper flange of the steel beam and through steel bars in the toothed perforated steel plate. The transverse steel bars and the longitudinal steel bars form a steel bar skeleton arranged in the concrete slab.

[0008] As a preferred solution, the concrete slab is specifically of RPC120 strength grade in the "Reactive Powder Concrete" (GB / T 31387-2015) specification.

[0009] As a preferred solution, the transverse steel plate for transmitting shear force and pressure is vertically welded to the toothed perforated steel plate to resist the pulling force between the steel and concrete and better transmit the pressure.

[0010] As a preferred solution, the bending angle and shape of the toothed shear-resistant perforated steel plate are variable.

[0011] As a preferred solution, the composite beam concrete slab and the serrated perforated steel plate with transverse steel plate will form a complete composite beam system together with through-steel bars, transverse steel bars and longitudinal steel bars, wherein the transverse steel bars and longitudinal steel bars are staggered and tied to form a steel cage, and the through-steel bars pass through the serrated perforated steel plate and are arranged in the concrete slab, together forming the final steel bar system.

[0012] As a preferred solution, the composite beam, while ensuring the mechanical properties of the composite beam, uses a more reasonable force transmission folded toothed shear connector to ensure the synergy between steel and concrete. The concrete used in the concrete wing plate is ultra-high performance concrete, which ensures that the mechanical properties are improved without excessively increasing its thickness; the use of toothed steel plates with transverse steel plates also fully utilizes the chemical adhesion between steel and concrete to ensure the reliable and effective transmission of shear forces between the two materials.

[0013] The implementation of the present invention has the following beneficial effects:

[0014] 1. High bearing capacity, high shear stiffness and good mechanical properties.

[0015] 2. The transverse steel plate changes the mechanical path and better shares the load.

[0016] 3. Under the premise of ensuring the strength, stiffness and stability of the composite beam, the reliable and effective transmission of shear force between steel and concrete is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an overall three-dimensional model diagram of the new composite beam of the present invention.

[0018] Figure 2 This is a standard view of the new composite beam of the present invention.

[0019] Figure 3 It is a cross-sectional view of the novel composite beam of the present invention.

[0020] Figure 4 It is a schematic diagram of the through steel bar 5 and the concrete tenon 6 of the new composite beam of the present invention. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings.

[0022] like Figure 1-3 As shown, a new type of composite beam with a toothed perforated plate connector with a transverse steel plate includes a concrete slab 1 and a steel beam, wherein the steel beam is welded by a web 2 and a flange 3, wherein the web 2 is provided with a toothed perforated steel plate 4 with a transverse steel plate, a through steel bar 5, a concrete tenon 6, a transverse steel bar 7 and a longitudinal steel bar 8, the toothed perforated steel plate 4 with a transverse steel plate is welded to the steel beam, and a perforated plate connector is formed by passing through the through steel bar 5 in the toothed perforated steel plate 4 with the transverse steel plate, and the transverse steel bar 7 and the longitudinal steel bar 8 form a steel bar skeleton arranged in the concrete slab 1.

[0023] The concrete slab 1 is specifically of RPC120 strength grade in the specification of Reactive Powder Concrete (GB / T 31387-2015).

[0024] The diameter of the concrete tenon 6 is consistent with the aperture diameter of the toothed perforated steel plate 4 with the transverse steel plate.

[0025] The diameter of the through steel bar 5 is slightly smaller than the diameter of the concrete tenon 6 .

[0026] Among them, the bending angle and shape of the toothed shear-resistant perforated steel plate with transverse steel plate are variable.

[0027] It should be noted that the present invention is a new type of composite beam with a toothed perforated plate connector with a transverse steel plate. When it is used in bridge projects, the internal structural parameters used in different projects are different. The size of the steel beam 1, the bending angle and shape of the toothed perforated steel plate 4 with the transverse steel plate, the hole size, the diameter of the through steel bar 3, etc. can be determined according to the specific project.

[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A novel composite beam with a toothed perforated steel plate connector with a transverse steel plate, comprising a concrete slab 1 and a steel beam, wherein the steel beam is welded by a web 2 and upper and lower steel flanges 3, wherein the upper flange is welded with a perforated steel plate 4 with a transverse steel plate, a through steel bar 5, a concrete tenon 6, a transverse steel bar 7 and a longitudinal steel bar 8, and the toothed perforated steel plate 4 with a transverse steel plate is welded to the upper flange of the steel beam, and a perforated plate connector is formed by passing through the steel bar 5 in the perforated steel plate 4, and the transverse steel bar 7 and the longitudinal steel bar 8 form a steel bar skeleton arranged in the concrete slab 1.

2. A novel composite beam with a toothed perforated steel plate connector with a transverse steel plate according to claim 1, characterized in that: The toothed perforated steel plate 4 with transverse steel plates is located above the upper flange 3 of the steel beam, and the perforated steel plate 4 passes through the through-steel bars 5 through the holes to form a perforated plate connector.

3. The novel composite beam with toothed perforated steel plate connectors with transverse steel plates according to claim 1, characterized in that: The transverse steel plates are arranged on the toothed steel plates, which can better transmit shear force and pressure through the change of force transmission path and resist the vertical slip between the steel beam and concrete.

4. The novel composite beam with toothed perforated steel plate connectors with transverse steel plates according to claim 1, characterized in that: The concrete slab 1 is specifically of RPC120 strength grade in the specification of Reactive Powder Concrete (GB / T 31387-2015).

5. The novel composite beam with toothed perforated steel plate connectors with transverse steel plates according to claim 1, characterized in that: The bending angle and shape of the toothed shear-resistant perforated steel plate with transverse steel plates are variable.

6. The novel composite beam with toothed perforated steel plate connectors with transverse steel plates according to claim 1, characterized in that: The diameter of the through-steel 5 is slightly smaller than the diameter of the concrete tenon 6 .

7. The novel composite beam with toothed perforated steel plate connectors with transverse steel plates according to claim 1, characterized in that: The interior of the composite beam concrete slab 1 and the toothed perforated steel plate 4 with transverse steel plate will form a complete composite beam system together with the through steel bars 5, the transverse steel bars 7 and the longitudinal steel bars 8, wherein the transverse steel bars 7 and the longitudinal steel bars 8 are staggered and tied to form a steel cage, and the through steel bars 5 pass through the perforated steel plate 4 and are arranged in the concrete slab 1, together forming the final steel bar system.

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