Novel composite beam with transverse steel plate high-strength bolt connecting pieces and tooth-shaped perforated steel plate connecting pieces

Abstract

The invention discloses a novel composite beam with a transverse steel plate high-strength bolt connecting piece and a tooth-shaped perforated steel plate connecting piece. The novel composite beam comprises a steel beam, a bent tooth-shaped perforated steel plate, a concrete plate, a penetrating reinforcing steel bar, a distributing reinforcing steel bar, a high-strength bolt and a concrete tenon. The bent tooth-shaped perforated steel plates are cut on the T-shaped steel to penetrate through the steel bars, so that the perforated steel plate connecting pieces are formed to connect the concrete and the steel beams, meanwhile, the bent steel beams can resist pressure above, and vertical displacement can be limited more reasonably through the high-strength bolt connecting pieces. The structure is simple, a combined beam structure form of a novel connecting piece is provided, construction is convenient and fast, reliable and effective transmission of shearing force between steel and concrete is guaranteed while the mechanical advantages of the steel and the concrete are fully utilized, the perforated plate connecting piece has higher shear bearing capacity compared with a welding stud, and the connecting piece is suitable for being used for a large-scale production line. The high-strength bolt connecting piece has good mechanical performance to resist longitudinal shearing force and transverse lifting force, has good shearing resistance and can limit vertical displacement.

Description

Technical Field

[0001] The invention relates to a novel composite beam with a transverse steel plate high-strength bolt connector and a toothed open hole steel plate connector. 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. In addition, the traditional composite beam steel beams are arranged with upper flanges, which will make the neutral axis of the cross section very close to the upper flange of the steel beam. The stress here is small, the material properties cannot be fully utilized, and the steel is wasted.

[0004] Therefore, in order to solve these problems, the present invention proposes a novel composite beam with a transverse steel plate high-strength bolt connector and a toothed open hole steel plate connector. 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 transverse steel plate high-strength bolt connectors and toothed open hole steel plate connectors, 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 new type of composite beam with a transverse steel plate high-strength bolt connector and a toothed perforated steel plate connector, comprising a concrete slab, a steel beam, through-steel bars, high-strength bolts, concrete tenons, a toothed perforated steel plate with a transverse steel plate, transverse steel bars and longitudinal steel bars. The toothed perforated steel plate with a transverse steel plate is welded to the web of the steel beam, and a perforated plate connector is formed by through-steel bars in the toothed perforated steel plate. The transverse steel plate is connected to the concrete slab as a whole by high-strength bolts, and the transverse steel bars and 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 anti-perforation steel plate are variable.

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

[0012] As a preferred solution, the composite beam saves a part of steel materials by combining the force characteristics of general composite beams while ensuring the mechanical properties of the composite beams, and at the same time, utilizes the toothed shear connector with transverse steel plates with more reasonable force transmission to ensure the synergistic effect between steel and concrete. Since the upper flange of the steel beam in the composite beam is generally under pressure, this part of the steel material can be replaced by concrete; the use of the toothed perforated steel plate with transverse steel plates also fully utilizes the chemical adhesion between steel and concrete to ensure the reliable and effective transmission of the shear force of the two material parts.

[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 connection of high-strength bolts can effectively limit the vertical slippage of the composite beam as a whole;

[0016] 3. The construction welding workload is low, and only a small amount of templates are required during the construction process.

[0017] 4. 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

[0018] Figure 1 This is an overall three-dimensional model diagram of the new composite beam of the present invention.

[0019] Figure 2 This is a standard view of the new composite beam of the present invention.

[0020] Figure 3 It is a cross-sectional view of the novel composite beam of the present invention.

[0021] Figure 4It is a schematic diagram of the through-steel bars 5 and the concrete tenons 6 of the novel composite beam of the present invention. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figure 1-3 As shown, a new type of composite beam with a transverse steel plate high-strength bolt connector and a toothed perforated steel plate connector comprises 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, a longitudinal steel bar 8 and a high-strength bolt 9, and a perforated plate connector is formed by welding the toothed perforated steel plate 4 with a transverse steel plate to the steel beam, and the through steel bar 5 is passed through the toothed perforated steel plate 4, and the transverse steel plate thereon is connected to the steel beam and the concrete slab 1 by high-strength bolts 9, and the transverse steel bar 7 and the longitudinal steel bar 8 form a steel bar skeleton arranged in the concrete slab 1.

[0024] The concrete slab 1 is specifically of RPC120 strength grade in the specification of Reactive Powder Concrete (GB / T 31387-2015).

[0025] The diameter of the concrete tenon 6 is consistent with the aperture diameter of the toothed perforated steel plate 4 .

[0026] The diameter of the through steel bar 5 is slightly smaller than the diameter of the concrete tenon 6 .

[0027] Among them, the bending angle and shape of the toothed shear-resistant perforated steel plate with transverse steel plate are variable.

[0028] It should be noted that the present invention is a new type of composite beam with a transverse steel plate high-strength bolt connector and a toothed perforated steel plate connector. When 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, the length and diameter of the high-strength bolt screw, etc. can be determined according to the specific project.

[0029] 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 new type of composite beam with a transverse steel plate high-strength bolt connector and a toothed perforated steel plate connector, comprising 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 perforated steel plate 4 with a transverse steel plate, a through steel bar 5, a concrete tenon 6, a transverse steel bar 7, a longitudinal steel bar 8 and a high-strength bolt 9, by welding the toothed perforated steel plate 4 with a transverse steel plate on the steel beam, and forming a perforated plate connector by through steel bars 5 in the perforated steel plate 4, the transverse steel plate on the perforated steel plate 4 is connected to the steel beam and the concrete slab 1 by high-strength bolts 9, and the transverse steel bars 7 and the longitudinal steel bars 8 form a steel bar skeleton arranged in the concrete slab 1.

2. A novel composite beam with transverse steel plate high-strength bolt connectors and toothed perforated steel plate connectors according to claim 1, characterized in that: The toothed perforated steel plate 4 with transverse steel plates is located on the web 2 of the steel beam, and the holes in the perforated steel plate 4 pass through the through steel bars 5 to form a perforated plate connector, on which the transverse steel plate is connected with high-strength bolts 9.

3. The novel composite beam with transverse steel plate high-strength bolt connectors and toothed perforated steel plate connectors according to claim 1, characterized in that: The transverse steel plates that transmit shear force and pressure are vertically connected to the toothed steel plates to resist the tensile force between steel and concrete and better transmit pressure.

4. The novel composite beam with transverse steel plate high-strength bolt connectors and toothed perforated steel plate connectors 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 transverse steel plate high-strength bolt connectors and toothed perforated steel plate connectors 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 transverse steel plate high-strength bolt connectors and toothed perforated steel plate connectors 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 transverse steel plate high-strength bolt connectors and toothed perforated steel plate connectors 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, transverse steel bars 7, longitudinal steel bars 8 and high-strength bolts 9, 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, forming the final steel bar system.

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