laminated board

Abstract

The utility model provides a kind of laminated slab, belong to prefabricated building building material field, including prefabricated bottom plate, steel frame and laminated cast-in-place layer;The steel frame includes abdominal main body and upper chord main body, the bottom of abdominal main body is fixed in the prefabricated bottom plate, and the top of abdominal main body is fixed in the upper chord main body;The upper chord main body is extended along the slab span direction of the laminated slab and is formed, and the inside of the upper chord main body has the cavity matched with the extension direction, at least the side wall surface of the upper chord main body along the extension direction is closed structure, and the cavity is formed with the concrete core by pouring, and the concrete core is continuously cast or discontinuously cast;The laminated cast-in-place layer is laminated and formed on the prefabricated bottom plate, and at least covers the steel frame.Being formed by the combination of concrete core and upper chord main body steel frame, improve economy without reducing strength.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building materials, and in particular to a composite board. Background Technology

[0002] Composite slabs, also known as precast concrete composite slabs, are a core product of the development of industrialized and prefabricated buildings. Structurally, they consist of a precast layer and a composite layer. The precast layer refers to precast components that are manufactured in a factory and then transported to the construction site for laying. After the precast components are laid, the composite layer is poured in place to form a floor slab or floor slab.

[0003] Existing precast composite slab components suffer from insufficient rigidity during transportation and installation, making the structure prone to damage. Therefore, existing technologies generally result in truss composite slabs and concrete-ribbed composite slabs. However, as slab spans increase, the rigidity of truss composite slabs becomes insufficient to support such large spans, while concrete-ribbed composite slabs are costly to precast. Therefore, this utility model was developed to address these issues. Utility Model Content

[0004] In view of the above, the primary problem to be solved by this utility model is to provide a more economical composite plate without affecting the structural stiffness.

[0005] Therefore, this utility model provides a composite slab, including a precast base slab, a steel frame, and a composite cast-in-place layer; the steel frame includes a main body and an upper chord, the bottom of the main body is embedded and fixed to the precast base slab, and the top of the main body is fixed to the upper chord; the upper chord extends along the span direction of the composite slab, and the interior of the upper chord has a cavity matching the extension direction, at least the sidewall of the upper chord along the extension direction is a closed structure, and a concrete core is poured into the cavity, the concrete core being continuously or intermittently poured; the composite cast-in-place layer is stacked on the precast base slab and at least covers the steel frame.

[0006] Preferably, the upper chord body is an upper chord tube, which is a square tube, a flat tube, a round tube, or a polygonal tube.

[0007] Preferably, the abdominal body is a abdominal rod, which is a steel bar or a steel pipe.

[0008] Preferably, the web members are single-row web members, double-row web members, or triangular web members.

[0009] Preferably, the abdominal body has a cavity inside, and the cavity of the abdominal body is filled with a concrete core.

[0010] Preferably, the abdominal body is made of structural steel.

[0011] Preferably, the web member is wavy.

[0012] Preferably, the span direction is the length direction or width direction of the precast base plate.

[0013] Preferably, the upper chord body is a variable stiffness upper chord body, the concrete core is intermittently cast, and at least the cavity of the upper chord body is a solid section in the middle of the plate and a hollow section on the side of the plate.

[0014] Preferably, the precast base plate is a high-performance concrete slab, a prestressed slab, or a UHPC slab.

[0015] The above technical solutions can be expressed individually or in combination to achieve the following beneficial effects: This scheme uses a concrete core combined with the upper chord and the main body of the abdomen to form a steel frame. While maintaining high rigidity, it can save a lot of materials and support the rigidity requirements of large-span composite precast components in the form of steel-concrete composite.

[0016] When laying the precast base plate of the composite slab, the bending moment is large in the middle and small on both sides. Therefore, the steel frame is designed as a variable stiffness steel frame with "solid section + hollow section" to meet the stiffness requirements while further saving materials.

[0017] The upper chord and the main body of the abdomen have diverse structural forms, and the building materials are easy to process and shape, which greatly reduces the need for equipment and improves efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the composite plate described in this utility model.

[0019] Figure 2 yes Figure 1 Cross-sectional view at point AA.

[0020] Figure 3 yes Figure 1 Cross-sectional view at point BB.

[0021] Figure 4 This is a structural diagram of a steel frame.

[0022] Figure 5 This is a schematic diagram of another steel frame structure.

[0023] Figure 6 This is another structural diagram of a steel frame.

[0024] Figure 7 This is a diagram of a variable stiffness steel frame.

[0025] The components are: 1. Precast base plate; 2. Steel frame; 21. Main body of the abdomen; 22. Main body of the upper chord; 23. Concrete core. Detailed Implementation

[0026] The following description is provided to enable those skilled in the art to implement and use the present invention and to incorporate it into specific application contexts. Various modifications and uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Therefore, the present invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0027] In the following detailed description, numerous specific details are set forth to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that practice of the present invention is not necessarily limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without detailed representation to avoid obscuring the present invention.

[0028] Readers should note all documents and references submitted concurrently with this specification and open to public inspection, the contents of which are incorporated herein by reference. Unless otherwise expressly stated, all features disclosed in this specification (including any appended claims, abstracts, and drawings) may be replaced by alternative features for the same, equivalent, or similar purposes. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features.

[0029] Note that, where used, the markings left, right, front, back, top, bottom, front, back, clockwise, and counterclockwise are merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or orientation between different parts of an object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Note that, in practice, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments. The combination of the content following "further," "preferably," "even further," or "more preferably" with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment can form yet another embodiment.

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0033] Please refer to Figures 1-7 This embodiment describes a composite slab, comprising a precast base slab 1, a steel frame 2, and a composite cast-in-place layer; the steel frame 2 includes a main body 21 and an upper chord 22, the bottom of the main body 21 is embedded and fixed to the precast base slab 1, and the top of the main body 21 is fixed to the upper chord 22; the upper chord 22 extends along the span direction of the composite slab, and the interior of the upper chord 22 has a cavity matching the extension direction, at least the sidewalls of the upper chord 22 along the extension direction are closed structures, and a concrete core 23 is poured into the cavity, which is continuously or intermittently poured; the composite cast-in-place layer is stacked and formed on the precast base slab 1, and at least covers the steel frame 2.

[0034] In this preferred embodiment, multiple steel frames 2 are arranged side-by-side on the precast base plate 1. The direction of their arrangement can be either the length or width of the plate. The spacing between the frames is not limited here, but is determined by actual implementation. In practice, the designer or manufacturer can design and implement the structure based on parameters such as span, without imposing any restrictions here.

[0035] Furthermore, the steel frame 2 includes a main body 21 and an upper chord body 22. The upper chord body 22 serves as a structural rib and is connected to the precast base plate 1 through the main body 21, thereby forming a bending reinforcement for the precast base plate 1.

[0036] Specifically, the upper chord body 22 is an upper chord tube, which can be a square tube, a flat tube, a round tube, a polygonal tube, etc. The length direction of the upper chord tube is the extension direction of the cavity, that is, the internal pipe of the upper chord tube is the cavity of the upper chord body 22. At least the side wall of the upper chord tube along the extension direction is a closed structure. The cavity is filled with a concrete core 23, which is continuously or intermittently poured.

[0037] In this embodiment, the upper chord tube is filled with a continuous concrete core 23. The concrete core 23 is concrete, and steel bars, wires, or strands can also be installed inside it along the length of the upper chord tube as structural reinforcement.

[0038] In another preferred embodiment of this invention, the upper chord body 22 is a variable stiffness upper chord body 22, and the concrete core 23 is intermittently cast. At least the cavity of the upper chord body 22 is a solid section in the middle of the slab and a hollow section on the side of the slab. Preferably, when laying the composite slab, the bending moment is large in the middle and small on both sides. Therefore, the precast base slab 1 is divided into three sections along the span direction: one middle section and two side sections. Furthermore, at least the cavity of the upper chord body 22 is a solid section in the middle section of the slab and a hollow section on the side sections of the slab, thereby meeting the variable stiffness requirement of the composite slab.

[0039] In a preferred embodiment of this invention, the abdominal body 21 is a web member, which is a reinforcing bar or a steel pipe. Preferably, it is a steel pipe. Furthermore, the abdominal body 21 has an internal cavity, and a concrete core 23 is poured into the cavity. Alternatively, the abdominal body 21 can be a structural steel section. The structural steel section can be a channel steel, angle steel, etc.

[0040] As a preferred embodiment of this example, the web members are single-row web members, double-row web members, or triangular web members.

[0041] Whether it is a single-row, double-row, or triangular web member, the web members are wavy. Furthermore, the crests of the wavy web members are connected to the upper chord body 22, and the troughs are fixed to the structural reinforcement of the precast base plate 1.

[0042] In a preferred embodiment of this invention, the precast base slab 1 is a high-performance concrete slab, a prestressed slab, or a UHPC slab. The cast-in-place composite layer is cast-in-place concrete.

[0043] Those skilled in the art can make various modifications to this utility model based on the above description. Therefore, without departing from the spirit of the claims, certain details in the embodiments should not be construed as limiting the utility model, and the scope of protection of this utility model shall be defined by the appended claims.

Claims

1. A composite slab, comprising a precast base slab, a steel frame, and a composite cast-in-place layer; characterized in that, The steel frame includes a main body and an upper chord. The bottom of the main body is embedded and fixed to the precast base plate, and the top of the main body is fixed to the upper chord. The upper chord extends along the span direction of the composite slab. The interior of the upper chord has a cavity matching the extension direction. At least the sidewalls of the upper chord along the extension direction are closed structures. A concrete core is poured into the cavity. The concrete core is poured continuously or intermittently. The composite cast-in-place layer is stacked and formed on the precast base plate and at least covers the steel frame.

2. The composite plate according to claim 1, characterized in that, The upper chord body is an upper chord tube, which can be a square tube, a flat tube, a round tube, or a polygonal tube.

3. The composite plate according to claim 1, characterized in that, The main body of the abdomen is a abdominal rod, which is a steel bar or steel pipe.

4. The composite plate according to claim 3, characterized in that, The web members can be single-row web members, double-row web members, or triangular web members.

5. The composite plate according to claim 3, characterized in that, The abdominal body has a cavity inside, and the cavity of the abdominal body is filled with a concrete core.

6. The composite plate according to claim 3, characterized in that, The main abdominal section is made of structural steel.

7. The composite plate according to claim 3, characterized in that, The web members are wavy.

8. The composite plate according to claim 1, characterized in that, The span direction of the slab is either the length direction or the width direction of the precast base slab.

9. The composite plate according to claim 1, characterized in that, The upper chord body is a variable stiffness upper chord body, and the concrete core is intermittently cast. At least the cavity of the upper chord body is a solid section in the middle of the plate and a hollow section on the side of the plate.

10. The composite plate according to claim 1, characterized in that, The precast base plate is a high-performance concrete slab, a prestressed slab, or a UHPC slab.

Images