A light and thin fabricated steel-pmma-fiber concrete composite slab

Abstract

The utility model relates to the field of assembly type steel - fiber reinforced concrete composite board discloses a light and thin assembly type steel - acrylic plate - fiber reinforced concrete composite board, it includes: the bottom plate, middle layer and fiber reinforced concrete panel are connected as a whole through the bolt nail from bottom to top, the bottom plate is steel bottom plate, the middle layer includes the acrylic plate that is equipped with the hole, the fiber reinforced concrete panel is formed by steel bar and fiber reinforced concrete pouring, the bolt nail one end passes through the hole of acrylic plate and is connected with the bottom plate, the bolt nail other end is anchored in the fiber reinforced concrete panel, the bolt nail equal interval is arranged transversely, longitudinally, the bolt nail is equipped with the screw thread along its length direction, is equipped with the screw hole that matches with the bolt nail on the bottom plate. The scheme is through increasing acrylic plate as middle layer and dispersing most strain energy, reduces permanent deformation caused by stress concentration, reduces the thickness of bridge deck slab surface, reduces the overall weight of bridge deck slab, keeps higher stiffness and carrying capacity simultaneously, facilitates quick construction installation.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated steel-acrylic sheet-fiber concrete composite panels, specifically to a lightweight prefabricated steel-acrylic sheet-fiber concrete composite panel. Background Technology

[0002] Bridge deck is a key component in bridge engineering. Also known as the roadway deck, it is a load-bearing structure that directly bears the wheel pressure of vehicles. In terms of construction, it is usually integrally connected with the beam ribs and transverse diaphragms of the main beam. This not only transfers vehicle loads to the main beam but also forms part of the main beam's cross section, ensuring the overall function of the main beam.

[0003] Bridge decks undergo significant bending deformation when subjected to vertical loads, which may lead to cracks or excessive deformation that renders them unsuitable for bearing loads. To ensure sufficient load-bearing capacity and stiffness, traditional designs typically increase the thickness of the decks or add stiffening ribs to enhance stiffness and load-bearing capacity. However, increasing the thickness of the decks directly increases their self-weight, which in turn increases the load on the vertical load-bearing components. Utility Model Content

[0004] The present invention aims to provide a lightweight and thin prefabricated steel-acrylic sheet-fiber concrete composite panel to solve the problems of current bridge decks that increase the thickness of the concrete layer and add stiffeners to ensure the load-bearing capacity of the panel, which leads to the heavy self-weight of the panel and the waste of vertical space due to the stiffeners.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a lightweight prefabricated steel-acrylic sheet-fiber concrete composite panel, comprising: a base plate, an intermediate layer, and a fiber concrete panel connected as a whole from bottom to top by studs; the base plate is a steel base plate; the intermediate layer includes an acrylic sheet with holes; the fiber concrete panel is cast from steel bars and fiber concrete; one end of each stud passes through the hole in the acrylic sheet and is connected to the base plate; the other end of each stud is anchored in the fiber concrete panel; the studs are evenly spaced in the horizontal and vertical directions; each stud has threads along its length; and the base plate has threaded holes that match the studs.

[0006] The principle of this scheme is as follows: First, in the prefabrication plant, the positions of the studs are located and holes are drilled for the steel base plate and the intermediate acrylic plate, and the studs are installed. Side molds are made using PVC boards or steel plates, the reinforcing bars are tied, and fiber concrete is poured into the molds to complete the fabrication of the composite panels. Then, at the installation site, the reinforcing bars between adjacent panels are lapped, and fiber concrete is poured into the gaps between the panels. Rivets are then laid at the bottom of the gaps to connect the steel beams, thereby fixing the panels to the steel beams of the building or bridge project.

[0007] Advantages of this solution: Compared to traditional bridge decks, adding a steel base plate significantly improves stiffness and load-bearing capacity, thereby reducing bending deformation of the bridge deck under vertical loads, delaying crack formation, and greatly enhancing safety and durability; the steel base plate can serve as a bottom formwork during prefabrication, resulting in high efficiency, effectively saving labor and building material consumption; adding an acrylic intermediate layer can dissipate most of the strain energy, reducing permanent deformation caused by stress concentration and minimizing panel warping; optimizing the structural form of the bridge deck only requires appropriately increasing the thickness of the bottom steel plate and improving the strength grade of the surface fiber concrete, which, compared to traditional panel designs that significantly increase panel thickness or add stiffening ribs to improve stiffness and load-bearing capacity, reduces the overall structural weight and avoids wasting vertical space; this steel-acrylic-fiber concrete composite panel facilitates the rapid construction and installation of bridge decks for bridge engineering projects.

[0008] Preferably, the stud is connected to a first nut at the bottom end of the steel base plate, and the first nut is welded and fixed to the steel base plate. Welding and fixing the first nut to the steel base plate facilitates the quick installation of the stud.

[0009] Preferably, the head of the stud is located within the fiber-reinforced concrete panel, positioned between the top and bottom reinforcing bars. This ensures a tight bond between the stud and the fiber-reinforced concrete and the reinforcing bars, enhancing the stud's pull-out resistance, preventing it from being pulled out of the concrete, and improving the overall structural stability. When the fiber-reinforced concrete panel is under stress, some stress can be transferred to the reinforcing bars, avoiding stress concentration and improving the load-bearing capacity and durability of the fiber-reinforced concrete panel. Furthermore, the stud head being encased in the fiber-reinforced concrete prevents corrosion from external factors, extending the structure's service life.

[0010] Preferably, a second nut is connected to the stud, the second nut being located above the acrylic sheet, and the second nut is used to fix the acrylic sheet to the base plate. By setting the second nut, the acrylic sheet and the base plate are tightly fitted together, avoiding local stress concentration, making the stress distribution of the structure more reasonable, and improving its overall load-bearing capacity and durability.

[0011] Preferably, the assembly also includes a washer supported on the acrylic sheet, the diameter of which is larger than the aperture of the hole in the acrylic sheet. This effectively prevents the second nut from loosening during use, ensuring the stability of the structural connection; the washer also reduces direct frictional damage between the second nut and the acrylic sheet, extending the service life of the first nut.

[0012] Preferably, the reinforcing bars at both ends of the fiber-reinforced concrete panel are exposed. The exposed reinforcing bars facilitate the connection between adjacent bridge panels and improve the strength of the connection between adjacent bridge panels.

[0013] Preferably, the structure also includes a concrete support base for supporting the bottom reinforcing bars in the fiber-reinforced concrete panel. Using the concrete support base to support the reinforcing bars prevents direct contact between the reinforcing bars and the acrylic sheet, allowing the reinforcing bars to be encased in fiber-reinforced concrete and enhancing the overall structural crack resistance.

[0014] Preferably, the top of the concrete support is provided with a placement groove for placing reinforcing bars, which makes it easier to install the reinforcing bars. Attached Figure Description

[0015] Figure 1 This is a frontal view of Embodiment 1 of the present utility model.

[0016] Figure 2 This is a cross-sectional schematic diagram of Embodiment 1 of this utility model.

[0017] Figure 3 This is a cross-sectional schematic diagram of Embodiment 2 of this utility model. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method:

[0019] The reference numerals in the accompanying drawings include: base plate 1, acrylic plate 2, transverse steel bar 3, longitudinal steel bar 4, stud 5, first nut 6, and second nut 7.

[0020] Example 1:

[0021] A lightweight, thin prefabricated steel-acrylic sheet / fiber reinforced concrete composite panel, as shown in the attached... Figure 1 and attached Figure 2 As shown, the structure includes, from bottom to top, a base plate 1, an intermediate layer, and a fiber-reinforced concrete panel. In this design, the base plate 1 is a steel base plate. Adding a steel base plate significantly improves stiffness and load-bearing capacity, thereby reducing the bending deformation of the bridge deck under vertical loads, delaying crack formation, and greatly enhancing safety and durability. Furthermore, the steel base plate can serve as a bottom formwork during prefabrication, resulting in high efficiency, effectively saving labor, and conserving building materials. The steel base plate is made of carbon steel and low-alloy steel, and its shape is planar, with its width and length designed according to the specific dimensions of the bridge deck.

[0022] The intermediate layer includes acrylic sheet 2. Adding this intermediate layer dissipates most of the strain energy, reducing permanent deformation caused by stress concentration and minimizing panel warping. It optimizes the bridge deck's structural form; by simply increasing the thickness of the bottom steel plate and improving the strength grade of the surface fiber-reinforced concrete, compared to traditional plate designs that significantly increase plate thickness or add stiffening ribs to enhance stiffness and load-bearing capacity, the overall structural weight is reduced, avoiding wasted vertical space. The length and width of acrylic sheet 2 are slightly smaller than the corresponding length and width of the bottom plate 1, allowing it to be encased in fiber-reinforced concrete, preventing corrosion from exposed acrylic sheet 2 and extending the structure's service life.

[0023] Fiber-reinforced concrete panels are made of reinforcing steel and fiber-reinforced concrete. The reinforcing steel includes transverse reinforcing bars 3 and longitudinal reinforcing bars 4, which are staggered vertically and form a grid. The number of reinforcing bars at the bottom of the fiber-reinforced concrete panel is greater than the number at the top. Both the longitudinal reinforcing bars 4 and the transverse reinforcing bars 3 are U-shaped. The staggered arrangement of the U-shaped reinforcing bars effectively prevents shrinkage cracks from forming on the panel surface, limits crack propagation, and enhances the bending and crack resistance.

[0024] One end of the stud 5 is used to connect the base plate 1 and the intermediate layer, while the other end of the stud 5 is located in the fiber concrete panel. The base plate 1, the intermediate layer, and the fiber concrete panel are integrally formed using the stud 5. This steel-acrylic sheet 2-fiber concrete composite panel facilitates the rapid construction and installation of bridge decks in bridge engineering projects.

[0025] The steel reinforcement bars at both ends of the fiber-reinforced concrete panel are exposed. The exposed reinforcement bars facilitate the connection between adjacent bridge panels and improve the strength of the connection between adjacent bridge panels.

[0026] It also includes concrete support bases, which are wider at the bottom and narrower at the top. These supports are used to support the bottom reinforcing bars in the fiber-reinforced concrete panel. Using concrete supports to support the reinforcing bars prevents them from directly contacting the acrylic sheet, allowing the reinforcing bars to be encased in fiber-reinforced concrete and enhancing the overall structural crack resistance. The top of the concrete support base has an arc-shaped groove with a radius larger than that of the reinforcing bar, ensuring stable placement and support of the reinforcing bars and facilitating their installation. In this design, the concrete support base is specifically U-shaped and made of fiber-reinforced concrete.

[0027] The studs 5 are arranged at equal intervals both laterally and longitudinally, with the longitudinal and transverse spacing being the same. This equal spacing ensures that each stud 5 experiences more uniform stress, reduces localized stress concentration, and improves the overall load-bearing capacity of the structure.

[0028] The stud 5 has threads along its length, and the base plate 1 has threaded holes that match the stud 5. A first nut 6 is connected to the bottom end of the stud 5 on the base plate 1. Using a threaded connection between the stud 5 and the base plate 1 eliminates residual stress in the steel plate caused by welding, thereby reducing its impact on the component's stiffness, fatigue strength, low-temperature brittleness, stability, and corrosion resistance. The first nut 5 is welded and fixed to the steel base plate, facilitating the rapid installation of the stud 5.

[0029] The head of stud 5 is located within the fiber-reinforced concrete panel, positioned between the top and bottom reinforcing bars. In this design, the head of stud 5 is positioned close to the top reinforcing bar of the fiber-reinforced concrete panel. This ensures a tight bond between stud 5 and the fiber-reinforced concrete and reinforcing bars, enhancing the stud 5's pull-out resistance and preventing it from being pulled out of the concrete, thus improving the overall structural stability. When the fiber-reinforced concrete panel is under stress, some stress can be transferred to the reinforcing bars, avoiding stress concentration and improving the load-bearing capacity and durability of the fiber-reinforced concrete panel. Furthermore, the head of stud 5 is encased in fiber-reinforced concrete, preventing corrosion from external factors and extending the service life of the structure.

[0030] Specific implementation process:

[0031] First, at the prefabrication plant, the positions of the studs 5 are determined and holes are drilled on the steel base plate and the intermediate acrylic plate 2, and the studs 5 are installed. Side molds are made using PVC or steel plates, and the reinforcing bars are tied. Fiber-reinforced concrete (C60 self-compacting concrete) is poured into the molds to complete the fabrication of the composite panels. After the composite panels are cured to the specified strength, they are transported to the installation site. The composite panels are first tied with ropes and then hoisted onto trucks using a 10t crane. At the installation site, the reinforcing bars between adjacent fiber-reinforced concrete panels are lapped, with the top of the studs 5 lower than or flush with the top reinforcing bars of the fiber-reinforced concrete panels. Fiber-reinforced concrete is then poured into the gaps between the panels, and rivets are laid at the bottom of the gaps to connect the steel beams, thereby fixing the panels to the steel beams of the building or bridge project.

[0032] This solution utilizes a steel-acrylic sheet-fiber reinforced concrete composite panel to facilitate the rapid completion of bridge deck construction. The addition of a steel base plate significantly enhances stiffness and load-bearing capacity, thereby reducing bending deformation of the bridge deck under vertical loads, delaying crack formation, and greatly improving safety and durability. Furthermore, the addition of an acrylic sheet-2 intermediate layer dissipates most strain energy, reducing permanent deformation caused by stress concentration and minimizing panel warping. Optimizing the bridge deck's structural form requires only a slight increase in the thickness of the bottom steel plate and a higher strength grade of the surface fiber reinforced concrete. Compared to traditional panel designs that significantly increase panel thickness or add stiffening ribs to improve stiffness and load-bearing capacity, this approach reduces the overall structural weight and avoids wasting vertical space.

[0033] Example 2:

[0034] The difference between this embodiment and Embodiment 1 is that, Figure 3 As shown, a second nut 7 is connected to the stud 5. The second nut 7 is located above the acrylic plate 2 and is used to fix the acrylic plate 2 to the base plate 1. By setting the second nut 7, the acrylic plate 2 and the base plate 1 are tightly fitted together, avoiding local stress concentration, making the stress distribution of the structure more reasonable, and improving its overall load-bearing capacity and durability.

[0035] It also includes a gasket, which is located between the second nut 7 and the acrylic plate 2. The diameter of the gasket is larger than the aperture on the acrylic plate 2. This effectively prevents the second nut 7 from loosening during use, ensuring the stability of the structural connection. The gasket also reduces direct frictional damage between the second nut 7 and the acrylic plate 2, extending the service life of the first nut 6.

[0036] The above descriptions are merely embodiments of this utility model, and common technical solutions and / or characteristics known in the scheme are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A lightweight, thin prefabricated steel-acrylic sheet-fiber concrete composite panel, characterized in that, include: The structure consists of a base plate, an intermediate layer, and a fiber-reinforced concrete panel connected as a whole from bottom to top by studs. The base plate is a steel base plate. The intermediate layer includes an acrylic sheet with holes. The fiber-reinforced concrete panel is made of steel bars and fiber-reinforced concrete. One end of each stud passes through a hole in the acrylic sheet and is connected to the base plate. The other end of each stud is anchored in the fiber-reinforced concrete panel. The studs are evenly spaced in both the horizontal and vertical directions. Each stud has threads along its length. The base plate has threaded holes that match the studs.

2. The lightweight prefabricated steel-acrylic sheet-fiber concrete composite panel according to claim 1, characterized in that: The stud is located at the bottom end of the steel base plate and is connected to a first nut, which is welded and fixed to the steel base plate.

3. The lightweight prefabricated steel-acrylic sheet-fiber concrete composite panel according to claim 1, characterized in that: The head of the stud is located in the fiber-reinforced concrete panel, and the head of the stud is positioned between the top and bottom reinforcing bars in the fiber-reinforced concrete panel.

4. The lightweight prefabricated steel-acrylic sheet-fiber concrete composite panel according to claim 2, characterized in that: A second nut is connected to the stud, and the second nut is located above the acrylic plate. The second nut is used to fix the acrylic plate to the base plate.

5. A lightweight prefabricated steel-acrylic sheet-fiber concrete composite panel according to claim 4, characterized in that: It also includes a pad supported on an acrylic sheet, the diameter of which is larger than the aperture of the acrylic sheet.

6. The lightweight prefabricated steel-acrylic sheet-fiber concrete composite panel according to claim 1, characterized in that: The reinforcing bars at both ends of the fiber-reinforced concrete panel are exposed.

7. The lightweight prefabricated steel-acrylic sheet-fiber concrete composite panel according to claim 1, characterized in that: It also includes a concrete support base for supporting the bottom reinforcing bars in the fiber-reinforced concrete panel.

8. A lightweight prefabricated steel-acrylic sheet-fiber concrete composite panel according to claim 7, characterized in that: The concrete support base is provided with a mounting groove on top, which is used to place reinforcing bars.

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