A kind of FRP steel plate concrete composite beam structure

Abstract

The utility model discloses a kind of FRP steel plate concrete composite beam body structure, it is related to composite beam body technical field, including steel plate, FRP cloth and concrete layer, the FRP cloth is located between steel plate and concrete layer, first transition layer is equipped between the FRP cloth and steel plate, second transition layer is equipped between the FRP cloth and concrete layer.The utility model is set by shear pin, cross type boss on steel plate, and shear block, cross type slot are set on FRP cloth, make the bonding between steel plate, FRP cloth and concrete layer more closely, simultaneously by first transition layer and second transition layer, further improve the bonding performance between FRP cloth and steel plate, concrete layer, and practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of composite beam technology, specifically an FRP steel plate concrete composite beam structure. Background Technology

[0002] FRP (fiber-reinforced polymer) materials are composite materials composed of fiber materials and matrix materials. Commonly used fiber materials include carbon fiber and glass fiber, while matrix materials include epoxy resin, vinyl ester resin, and unsaturated polyester resin.

[0003] With the increasing demands for structural performance in modern architecture, bridges, and other engineering fields, FRP (fiber reinforced plastic) steel plate concrete composite beam structures have emerged. This structural form integrates the advantages of FRP materials, steel plates, and concrete, aiming to fully utilize the mechanical properties of each material to meet the requirements of engineering projects in terms of structural strength, stiffness, durability, and corrosion resistance. In recent years, it has been increasingly widely used in many fields such as civil engineering.

[0004] Currently, the bonding between FRP and steel plates mainly relies on adhesives, while the bonding between FRP and concrete depends primarily on mechanical interlocking and chemical adsorption. Due to the different material properties of these three materials, their bonding performance is prone to degradation under the influence of loads, environmental changes, and other factors.

[0005] Based on this, an FRP steel plate concrete composite beam structure is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0006] The purpose of this utility model is to provide an FRP steel plate concrete composite beam structure to solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: An FRP steel plate concrete composite beam structure includes a steel plate, an FRP fabric and a concrete layer, wherein the FRP fabric is disposed between the steel plate and the concrete layer, a first transition layer is provided between the FRP fabric and the steel plate, and a second transition layer is provided between the FRP fabric and the concrete layer.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative: the steel plate is a profiled steel plate, the profiled steel plate has shear studs in the groove, and the profiled steel plate has cross-shaped protrusions on both sides of the protrusion.

[0009] In one alternative: the FRP fabric has a cross-shaped groove, the cross-shaped groove corresponds to a cross-shaped protrusion, and the FRP fabric has a shear block at the position corresponding to the protrusion of the profiled steel sheet.

[0010] In one alternative: the shear block is provided with a groove, and two anti-pull-out blocks are symmetrically provided on both sides of the shear block.

[0011] In one alternative: the first transition layer is a modified epoxy resin transition layer with a thickness of 1-5 mm.

[0012] In one alternative: the second transition layer is made of cement mortar incorporating a silane coupling agent, with a thickness of 3-8 mm.

[0013] In one alternative: the adhesive used between the first transition layer and the steel plate, and between the second transition layer and the concrete layer, is an epoxy resin adhesive.

[0014] In one alternative: the adhesive between the first transition layer, the second transition layer and the FRP fabric is an epoxy resin modified adhesive.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention uses shear studs and cross-shaped protrusions on the steel plate and shear blocks and cross-shaped slots on the FRP cloth to make the bond between the steel plate, FRP cloth and concrete layer tighter. At the same time, the first transition layer and the second transition layer further improve the bonding performance between the FRP cloth and the steel plate and concrete layer. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the steel plate structure in this utility model.

[0018] Figure 3 This is a schematic diagram of the FRP fabric in this utility model.

[0019] Figure reference numerals: 100, steel plate; 101, profiled steel sheet; 102, shear stud; 103, cross-shaped protrusion; 200, FRP fabric; 201, cross-shaped slot; 203, shear block; 204, groove; 205, pull-out block; 300, concrete layer; 400, first transition layer; 500, second transition layer. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] In one embodiment, such as Figure 1 As shown, an FRP steel plate-concrete composite beam structure includes a steel plate 100, an FRP fabric 200, and a concrete layer 300. The FRP fabric 200 is disposed between the steel plate 100 and the concrete layer 300. A first transition layer 400 is provided between the FRP fabric 200 and the steel plate 100, and a second transition layer 500 is provided between the FRP fabric 200 and the concrete layer 300. The first transition layer 400 and the second transition layer 500 can improve the bonding performance between the FRP fabric and the steel plate 100 and the concrete layer 300.

[0022] In one embodiment, such as Figure 2 As shown, the steel plate 100 is a profiled steel plate 101. Shear studs 102 are provided in the groove of the profiled steel plate 101. The shear studs 102 improve the connection between the profiled steel plate 101 and the concrete layer 300. Cross-shaped protrusions 103 are provided on both sides of the protrusion of the profiled steel plate 101. The cross-shaped protrusions 103 are used to engage with the cross-shaped slots 201 on the FRP cloth 200.

[0023] In one embodiment, such as Figure 3 As shown, the FRP fabric 200 has a cross-shaped slot 201, which corresponds to the cross-shaped protrusion 103, so that the FRP fabric 200 and the profiled steel sheet 101 are tightly engaged, preventing relative slippage between the FRP fabric 200 and the profiled steel sheet 101. Shear blocks 203 are provided at positions corresponding to the protrusions of the FRP fabric 200 and the profiled steel sheet 101. The shear blocks 203 have grooves 204, and two anti-pull-out blocks 205 are symmetrically provided on both sides of the shear blocks 203. The shear blocks 203 can enhance the connection between the FRP fabric 200 and the concrete layer 300.

[0024] In one embodiment, the first transition layer 400 is a modified epoxy resin transition layer with a thickness of 1-5 mm. The epoxy resin transition layer can fully fuse with the resin on the surface of the FRP cloth 200 and can also be tightly bonded to the surface of the steel plate.

[0025] In one embodiment, the second transition layer 500 is made of cement mortar with silane coupling agent and has a thickness of 3-8 mm. The silane coupling agent can chemically bond with cement hydration products and the surface of FRP cloth 200 to form a "molecular bridge", which enhances the adhesion between FRP cloth 200 and concrete layer 300, and at the same time improves the impermeability and durability of the interface.

[0026] In one embodiment, the adhesive between the first transition layer 400 and the steel plate 100, and between the second transition layer 500 and the concrete layer 300, is an epoxy resin adhesive. Epoxy resin adhesives have good bonding performance, high strength, and good chemical corrosion resistance. They can form a strong chemical bond with the surface of the steel plate 100 and can also penetrate into the micropores on the surface of the concrete layer 300.

[0027] In one embodiment, the adhesive between the first transition layer 400, the second transition layer 500 and the FRP cloth 200 is an epoxy resin modified adhesive. The epoxy resin modified adhesive is well compatible with the resin components in the FRP, forming a strong adhesive force to ensure a tight bond between the transition layer and the FRP cloth 200.

[0028] The above embodiments disclose an FRP steel plate concrete composite beam structure. Through the shear studs 102 and cross-shaped protrusions 103 provided on the steel plate 100 and the shear blocks 203 and cross-shaped slots 201 provided on the FRP cloth 200, the bonding between the steel plate 100, the FRP cloth 200 and the concrete layer 300 is made tighter. At the same time, the bonding performance between the FRP cloth 200 and the steel plate 100 and the concrete layer 300 is further improved through the first transition layer 400 and the second transition layer 500.

[0029] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A composite beam structure made of FRP steel plate and concrete, characterized in that, It includes a steel plate (100), an FRP fabric (200), and a concrete layer (300). The FRP fabric (200) is disposed between the steel plate (100) and the concrete layer (300). A first transition layer (400) is provided between the FRP fabric (200) and the steel plate (100), and a second transition layer (500) is provided between the FRP fabric (200) and the concrete layer (300). The steel plate (100) is a profiled steel plate (101), and shear studs (102) are provided in the groove of the profiled steel plate (101). Cross-shaped protrusions (103) are provided on both sides of the protrusion of the profiled steel plate (101). The FRP fabric (200) is provided with a cross-shaped groove (201), the cross-shaped groove (201) corresponds to the cross-shaped protrusion (103), and the FRP fabric (200) is provided with a shear block (203) at the position corresponding to the protrusion of the profiled steel sheet (101).

2. The FRP steel plate concrete composite beam structure according to claim 1, characterized in that, The shear block (203) is provided with a groove (204), and two anti-pull blocks (205) are symmetrically provided on both sides of the shear block (203).

3. The FRP steel plate concrete composite beam structure according to claim 1, characterized in that, The first transition layer (400) is a modified epoxy resin transition layer with a thickness of 1-5 mm.

4. The FRP steel plate concrete composite beam structure according to claim 1, characterized in that, The second transition layer (500) is made of cement mortar mixed with silane coupling agent, with a thickness of 3-8 mm.

5. The FRP steel plate concrete composite beam structure according to claim 1, characterized in that, The adhesive used between the first transition layer (400) and the steel plate (100), and between the second transition layer (500) and the concrete layer (300) is an epoxy resin adhesive.

6. The FRP steel plate concrete composite beam structure according to claim 1, characterized in that, The adhesive between the first transition layer (400), the second transition layer (500) and the FRP cloth (200) is an epoxy resin modified adhesive.

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