Lightweight composite material structure panel

Abstract

The utility model discloses a lightweight composite material structure panel which comprises an upper panel, a bottom plate, web plates and connecting plates, the upper panel and the bottom plate are arranged in parallel in an overlapped mode, the two sides of the upper panel and the two sides of the bottom plate are sealed through the web plates, the space between the upper panel and the bottom plate is divided into a plurality of cavities through the connecting plates, and the connecting plates, the upper panel and the bottom plate form an I shape. The web is parallel to the connecting plate; a pultrusion profile FRP is integrally formed, a layer of steel plate is laid on the upper portion of the upper panel, the upper panel is bonded through epoxy resin, supports are arranged at the positions, located at the two ends, in the cavity, the panel is light in weight and simple and reliable in structure, a passing road surface is divided into minimum replaceable units, and the service life of the passing road surface is prolonged. An emergency passage pavement can be quickly paved in a short time, the dead weight of the bridge deck and the use amount of materials can be greatly reduced, the purpose of reducing the cost is achieved, and the combined bridge deck has the advantages of being light in weight, high in field installation quality, high in construction speed, capable of reducing the manufacturing cost and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge emergency repair, and specifically relates to a lightweight composite material structure panel. Background Art

[0002] China's bridge engineering has developed rapidly by following the general law of technological development and taking the path of "integration-development-innovation". However, materials are the foundation of bridge engineering, so the development of super-large bridges is based on the development of material technology. So far, China has achieved the ability to produce concrete, steel, cables, composite materials and smart materials domestically. However, the pavement of bridges is basically segmented units, and the smallest unit is also very large in size and weight. Once damaged, emergency repair and replacement will cost a lot of manpower and material resources, and the economic cost is high. Utility Model Content

[0003] In view of the above problems, the main purpose of the utility model is to design a lightweight composite material structural panel, divide the road surface into the smallest replacement unit, and pave an emergency road surface in a short time, thereby solving the problems of difficulty and high economic cost in repairing damaged bridge pavement.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A lightweight composite material structural panel, comprising an upper panel and a bottom panel, wherein the upper panel and the bottom panel are arranged in parallel and overlapped, the upper panel and the bottom panel are sealed on both sides by a web plate, and the upper panel and the bottom panel are divided into a plurality of chambers by a connecting plate, and the web plate and the connecting plate are arranged in parallel;

[0006] Supports are arranged at positions at both ends of the chamber.

[0007] As a further description of the present invention, the connecting plate, the upper panel and the bottom plate form an I-shape.

[0008] As a further description of the utility model, a layer of steel plate is laid on the upper part of the upper panel, the thickness of the steel plate is 3±0.2 mm, and the upper panel is bonded by epoxy resin.

[0009] As a further description of the utility model, the support is configured as a cylindrical steel cylinder, and the outside of the steel cylinder includes four outwardly diverging reinforcing steel plates, wherein two corresponding groups of reinforcing steel plates are supported between the connecting plates, and another two corresponding groups of reinforcing steel plates are parallel to the connecting plates.

[0010] As a further description of the present invention, through holes for bolt fixing are provided on the upper panel, the bottom plate and the steel plate at positions corresponding to the steel cylinders.

[0011] As a further description of the present invention, the upper panel, the bottom panel, the web, and the connecting plate are formed by integrally forming the pultruded profile in a lattice form.

[0012] As a further description of the present invention, the upper panel, the bottom plate, the web and the connecting plate are made of fiber-reinforced composite materials.

[0013] Compared with the prior art, the technical effects of the utility model are:

[0014] The utility model provides a lightweight composite material structure panel, including an upper panel, a bottom plate, a web plate, and a connecting plate. The upper panel is parallel to and overlaps with the bottom plate, and both sides of the upper panel and the bottom plate are sealed by the web plate. The upper panel and the bottom plate are divided into a plurality of chambers by the connecting plate, and the connecting plate, the upper panel, and the bottom plate form an I-shape; the web plate and the connecting plate are arranged in parallel; a layer of steel plate is laid flat on the upper part of the upper panel, and the upper panel is bonded by epoxy resin, and supports are arranged at positions at both ends of the chamber. The panel is light in weight and has a simple and reliable structure. It not only realizes the division of the road surface into the smallest replaceable unit, and quickly lays an emergency road surface in a short time, but also can greatly reduce the dead weight of the bridge panel and the amount of materials used, so as to achieve the purpose of reducing costs, so that the combined bridge panel has the advantages of light weight, high on-site installation quality, fast construction speed, and reduced cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the planar structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of a panel of the present utility model;

[0017] Figure 3 This is a view showing the connection plate, upper panel and bottom plate of the utility model;

[0018] Figure 4 This is a schematic diagram of the support matching structure of the utility model;

[0019] Figure 5 This is a finite element model diagram of a single panel of the utility model;

[0020] Figure 6 It is a load loading position view of the utility model;

[0021] Figure 7 It is a plan view of the pavement system of the present utility model.

[0022] In the figure, 1. upper panel, 2. bottom plate, 3. web plate, 4. connecting plate, 5. chamber, 6. steel plate, 7. support, 71. steel cylinder, 72. reinforcing steel plate. DETAILED DESCRIPTION

[0023] The utility model is described in detail below with reference to the accompanying drawings:

[0024] In the utility model, a lightweight composite material structural panel is provided. Figure 1-7 As shown, it includes an upper panel 1, a bottom plate 2, a web 3, and a connecting plate 4. The upper panel 1 is parallel to and overlaps the bottom plate 2. The upper panel 1 and the bottom plate 2 are sealed on both sides by the web 3. The upper panel 1 and the bottom plate 2 are divided into a plurality of chambers 5 by the connecting plate 4, and the connecting plate 4 forms an I-shaped with the upper panel 1 and the bottom plate 2. The web 3 is parallel to the connecting plate 4. Specifically, the thickness of the upper panel 1 is 5±0.2mm, the thickness of the web 3 is 60±0.2mm, and the thickness of the bottom plate 2 is 5±0.2mm. In addition, a layer of steel plate 6 is laid flat on the upper part of the upper panel 1, and the thickness of the steel plate 6 is 3±0.2mm, and the top of the upper panel 1 is bonded by epoxy resin.

[0025] like Figure 4 As shown, supports 7 are arranged at the two ends of the chamber 5. In this embodiment, the supports 7 are not arranged in two adjacent chambers 5 at the same time. In the specific use process, one support 7 can be arranged in each chamber 5 according to the needs.

[0026] In this embodiment, the support 7 is configured as a cylindrical steel cylinder 71, and the outside of the steel cylinder 71 includes four outwardly diverging reinforcing steel plates 72, wherein two corresponding groups of reinforcing steel plates 72 are supported between the connecting plates 4, and the other two corresponding groups of reinforcing steel plates 72 are parallel to the connecting plates 4 to ensure the structural continuity of the connecting plates 4. Specifically, the inner diameter of the steel cylinder 71 is 60±0.2 mm, and the thickness is 5±0.2 mm.

[0027] It should be noted that the upper panel 1, the bottom panel 2 and the steel plate 6 are provided with through holes for bolt fixing at positions corresponding to the steel cylinder 71. Bolts pass through the through holes to fix the panel of this embodiment.

[0028] In this embodiment, in the specific manufacturing process, the upper panel 1, the bottom panel 2, the web 3, and the connecting plate 4 are formed by integrally forming the pultruded profile, and are in the form of a lattice. The upper panel 1, the bottom panel 2, the web 3, and the connecting plate 4 are made of fiber-reinforced composite materials. The thickness is 70±0.2mm, and the total thickness is 73±0.2mm. The net weight of a single panel is 103.54kg, and the unit weight is 51.77kg / ㎡.

[0029] Specifically, the fiber reinforced polymer (FRP) in the above-mentioned panels has ultra-high specific strength, ultra-durability and excellent designability, which makes it suitable for streamlined and modular production, and it is easy and quick to assemble and install. Since fiber reinforced polymer (FRP) has high specific strength and its reinforcement has little effect on the appearance of the structure, it has gradually received attention and research in the field of structural reinforcement. It can better meet the needs of modern bridge engineering for light weight, high strength and durability. At present, FRP has been widely used in bridge engineering at home and abroad, and has become one of the hot research directions as the main load-bearing member of the bridge. Lattice web reinforcement fiber has attracted the attention of engineering researchers because of its light weight, high strength, corrosion resistance and good fatigue performance.

[0030] In this embodiment, the calculation model of the above panel is described as follows:

[0031] ABAQUS was used to establish a node finite element model consistent with the size of the test specimen. A relatively fine mesh size of 10 mm was selected for the bridge deck components, and the unit type was a three-dimensional linear reduced integration unit (C3D8R). After the special-shaped section was reasonably cut, the structured mesh was used and the neutral axis algorithm was used. The mesh size of the loading support was 60±0.2 mm to improve the calculation efficiency. The unit shape was all hexahedral structured meshing. The support was divided by swept mesh technology, and the unit type was C3D8I, which was the same as the mesh size of the web connected to it. In order to simplify the model and improve the calculation efficiency, the welding connection was simplified, and the "TIE" command was used to connect the two sides with equal strength, ignoring the influence of welding residual stress and residual deformation factors. Epoxy resin was used to bond the steel plate to the pultruded FRP; the steel plate was welded to the reinforcing steel plate and the steel cylinder in the form of TIE bonding; the bolts were in contact with the steel cylinder and the support: the tangential friction coefficient was 0.3, and the normal was hard contact; the upper panel and the support were also in contact. In finite element analysis, stress concentration is very likely to occur at the loading position and the support position, which leads to the failure of the entire calculation process. Specifically, it is manifested as deformed displacement and singular stress in certain areas of the displacement cloud diagram. In order to overcome the problem of stress concentration, the support reinforcement and loading connection plate are used to fully diffuse the force flow, which is more conducive to convergence calculation and eliminate singular values.

[0032] This example analyzes the cohesive bonding surface, and the content is as follows:

[0033] Since the steel plate and FRP pultruded profile are bonded with epoxy resin, cohesive is used for simulation in ABAQUS. Compared with the friction unit that simply defines the relationship between the interfaces of the two materials as a linear relationship, the cohesive unit in ABAQUS can better reflect the macroscopic mechanical response of damage and peeling of the bonding interface under shear load. Based on the bilinear constitutive model of ABAQUS finite element cohesive-behavior (0 thickness cohesive contact model) to simulate the interlayer action of the colloid, as shown in the following figure: Figure 7 As shown in the figure, the material is in the elastic stage before the peak value, and the stiffness degradation of the colloid will occur after reaching the peak value. The maximum nominal stress criterion is used as the judgment criterion for tensile shear damage (as long as the nominal stress in one direction is greater than or equal to 1, the cross section begins to be damaged), and the BK criterion is used in the damage evolution stage.

[0034] The technical solution of the utility model is disclosed through the above content. Compared with the prior art, the new lightweight composite material structural panel proposed in the utility model can divide the road surface into the smallest replaceable units, quickly lay an emergency road surface in a short time, and can also greatly reduce the dead weight of the bridge panel and the amount of materials used, so as to achieve the purpose of reducing costs, so that the composite bridge panel has the advantages of light weight, high quality of on-site installation, fast construction speed and reduced cost.

[0035] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A lightweight composite material structural panel, characterized in that: It comprises an upper panel and a bottom panel, the upper panel and the bottom panel are arranged parallel and overlapped, the upper panel and the bottom panel are sealed on both sides by a web plate, and the upper panel and the bottom panel are divided into a plurality of chambers by a connecting plate, and the web plate and the connecting plate are arranged parallel; Supports are arranged at positions at both ends of the chamber.

2. A lightweight composite material structural panel according to claim 1, characterized in that: The connecting plate, the upper panel and the bottom plate form an I-shape.

3. The lightweight composite material structural panel according to claim 1, characterized in that: A layer of steel plate is laid on the upper part of the upper panel, the thickness of the steel plate is 3±0.2 mm, and the upper panel is bonded by epoxy resin.

4. A lightweight composite material structural panel according to claim 3, characterized in that: The support is configured as a cylindrical steel cylinder, and the exterior of the steel cylinder includes four outwardly diverging reinforcing steel plates, wherein two corresponding groups of reinforcing steel plates are supported between the connecting plates, and another two corresponding groups of reinforcing steel plates are parallel to the connecting plates.

5. A lightweight composite material structural panel according to claim 4, characterized in that: The upper panel, the bottom plate and the steel plate are provided with through holes for bolt fixing at positions corresponding to the steel cylinders.

6. A lightweight composite material structural panel according to any one of claims 1 to 5, characterized in that: The upper panel, the bottom panel, the web and the connecting plate are formed by integrally forming the pultruded profile in a lattice form.

7. A lightweight composite material structural panel according to claim 6, characterized in that: The upper panel, the bottom plate, the web plate and the connecting plate are made of fiber-reinforced composite material.

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