Fully-fabricated steel-concrete combined open-web sandwich plate structure

Abstract

The invention relates to the technical field of sandwich plates, in particular to a full-assembly type steel-concrete combined hollow sandwich plate structure. According to the technical scheme, four layers of assembly frames are included, the second layer of assembly frame is located at the 1 / 4 open-web sandwich plate total height away from the top of the open-web sandwich plate, the third layer of assembly frame is located at the 1 / 4 open-web sandwich plate total height away from the bottom of the open-web sandwich plate, each of the four layers of assembly frames comprises a plurality of prefabricated units, and each prefabricated unit comprises a plurality of sets of reinforcing ribs; the connecting ribs are arranged among the four layers of assembling frames, connecting pieces are arranged at the connecting positions of the reinforcing ribs and the connecting positions of the reinforcing ribs and the connecting ribs, and first bolts are arranged on the connecting pieces in a penetrating mode; the second bolts are arranged at the top of the upper assembly frame, and the upper surface of the upper assembly frame is covered with a concrete thin plate. The construction process can be simplified, the construction period can be shortened, the cost can be reduced, and the concrete open-web sandwich plate structure can be promoted to be widely popularized and applied.

Description

Technical Field

[0001] This invention relates to the field of sandwich panel technology, and more particularly to a fully prefabricated steel-concrete composite hollow sandwich panel structure. Background Technology

[0002] Concrete hollow sandwich slab structures, with their core advantage of adapting to the needs of large-span and large-space buildings, have been widely adopted in many fields such as large commercial complexes, industrial plants, cultural venues, and multi-story and high-rise buildings. Currently, the construction of concrete hollow sandwich slab structures is mainly carried out by on-site casting. However, this construction method has significant drawbacks due to its cumbersome and complex procedures, requiring multiple sequential steps. Although a sequential construction mode can be adopted in actual construction, and some processes can be carried out simultaneously within a single sequential section, compared to ribbed floor slab structures, concrete hollow sandwich slab structures require two concrete pours per floor. This repetitive and cumbersome construction process directly leads to a significant extension of the construction period, while the erection of full-span scaffolding, multiple formwork installations and removals, and two concrete pours and curing operations all increase construction costs.

[0003] The existing three-layer T-shaped steel hollow beam structure places the middle layer's T-section at the center of the total height. While this represents an improvement over traditional concrete structures, its cross-sectional material distribution is insufficient for large-span (20-40m) applications. It fails to fully utilize the mechanical advantages of materials being far from the neutral axis, resulting in limitations in structural stiffness, lateral displacement resistance, and load-bearing efficiency. Furthermore, this three-layer structure has room for improvement in terms of prefabricated connection precision and overall synergistic load-bearing performance, and its self-weight control is limited, making it difficult to simultaneously meet the multiple demands of large-span buildings for lightweight, high-strength, and economical structural design. Therefore, this application proposes a fully prefabricated steel-concrete composite hollow sandwich panel structure. Summary of the Invention

[0004] The purpose of this invention is to address the problem that traditional concrete hollow sandwich panel structures have cumbersome on-site construction procedures, requiring two layers of concrete pouring, resulting in long construction periods and high costs, which limits their widespread application. The invention proposes a fully prefabricated steel-concrete composite hollow sandwich panel structure.

[0005] The technical solution of this invention: A fully prefabricated steel-concrete composite hollow sandwich panel structure, comprising four layers of assembly frames. The second layer of assembly frames is located at 1 / 4 of the total height of the hollow sandwich panel from the top, and the third layer of assembly frames is located at 1 / 4 of the total height of the hollow sandwich panel from the bottom. Each of the four assembly frames comprises multiple prefabricated units, each prefabricated unit comprising multiple sets of reinforcing ribs. Connecting ribs are disposed between the four layers of assembly frames, and connectors are provided at the connections between the reinforcing ribs and between the reinforcing ribs and the connecting ribs. First bolts are passed through the connectors. Multiple sets of second bolts are disposed at the top of the upper assembly frame, the upper surface of which is covered with a thin concrete slab, which is penetrated by the second bolts. Positioning components are disposed on the second bolts, and the positioning components are used to fix the second bolts.

[0006] Optionally, the reinforcing rib is a quadrangular prism, and the four sides of the reinforcing rib are respectively provided with a first sliding groove.

[0007] Optionally, the connecting rib is a quadrangular prism, and a second sliding groove is provided on each of the four sides of the connecting rib.

[0008] Optionally, the connector is L-shaped, and connecting holes are respectively opened on the connector at positions corresponding to the reinforcing rib and the connecting rib. The first bolt passes through the connecting hole, and the head of the first bolt is slidably connected to the first groove or the second groove. A nut is threaded onto the first bolt.

[0009] Optionally, a washer is fitted onto the first bolt, the washer being located between the connector and the nut.

[0010] Optionally, the positioning component includes a movable piece threaded to the second bolt, with limit strips fixedly connected to both sides of the movable piece, and the two sets of limit strips slidably connected to both sides of the first groove.

[0011] Optionally, the bottom of the movable piece is fixedly connected to an inner ring, the outer ring of the inner ring is rotatably connected to an outer ring, the bottom of the outer ring is fixedly connected to a positioning plate, and the positioning plate is slidably connected in the first groove.

[0012] Compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0013] This invention uses modular prefabricated units to form an assembly frame, combined with a sliding bolt connection structure for reinforcing ribs and connecting ribs, which allows for flexible adjustment of the connection position and greatly simplifies on-site construction procedures. Unlike traditional cast-in-place structures, it eliminates the need for multiple concrete pouring and curing, full-span scaffolding erection, and multiple formwork disassembly and assembly, significantly shortening the construction period and reducing construction costs such as scaffolding, formwork, and labor, thus solving the construction bottleneck in the promotion and application of traditional structures.

[0014] Furthermore, by using reinforcing ribs as core load-bearing components and connecting ribs to achieve collaborative force sharing among multi-layer assembled frames, and with the stable connection of torsion-shear type high-strength bolts and L-shaped connectors, the overall rigidity and load-bearing capacity of the structure are improved; the multi-layer design can adapt to the needs of buildings with different spans, and the combination of various prefabricated units can adapt to different building floor plans, further expanding the application scenarios of the structure.

[0015] In summary, this invention simplifies construction procedures, shortens construction period, and reduces costs, thus facilitating the wider application of hollow concrete sandwich panel structures. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a fully prefabricated steel-concrete composite hollow sandwich panel structure.

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a disassembled structural diagram of the positioning component;

[0019] Figure 4 A schematic diagram of the cross-sectional structure of the reinforcing ribs.

[0020] Figure label:

[0021] 1. Reinforcing rib; 11. First sliding groove;

[0022] 2. Connecting rib; 21. Second sliding groove;

[0023] 3. Connecting parts; 31. Connecting holes;

[0024] 4. First bolt; 41. Nut; 42. Washer;

[0025] 5. Second bolt; 6. Positioning assembly; 61. Moving piece; 62. Limiting strip; 63. Inner ring; 64. Outer ring; 65. Positioning plate. Detailed Implementation

[0026] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0027] Example

[0028] like Figure 1 and Figure 2 As shown, this invention proposes a fully prefabricated steel-concrete composite hollow sandwich panel structure, comprising four layers of prefabricated frames. Each of the four prefabricated frames includes multiple prefabricated units, and each prefabricated unit includes multiple sets of reinforcing ribs 1. The reinforcing ribs 1 are quadrangular prisms and serve as the core load-bearing components of the prefabricated frames. The increased number of reinforcing ribs significantly improves the overall load-bearing capacity and deformation resistance of the four-layer prefabricated frames, adapting to the stress requirements of large spans of 20-40m. The four sides of the reinforcing ribs 1 are each provided with a first sliding groove 11 to provide sliding and installation space for the heads of the first bolts 4, facilitating the adjustment of bolt positions during assembly, adapting to the connection requirements of different prefabricated units, and improving assembly flexibility.

[0029] It is worth mentioning that the prefabricated unit forms an L-shaped structure when using two sets of reinforcing ribs, a U-shaped structure when using three sets of reinforcing ribs, and a square-shaped structure when using four sets of reinforcing ribs. The prefabricated units of various shapes can be flexibly combined to adapt to the layout requirements of different building plans. They are especially easy to splice into a grid frame with a rectangular plane. Multiple prefabricated frames are assembled to form an assembly frame, realizing the modular construction of the assembly frame and improving on-site assembly efficiency.

[0030] Furthermore, the aforementioned sandwich panel structure also includes connecting ribs 2 disposed between the four assembly frames. The connecting ribs 2 are quadrangular prisms, and their core function is to achieve a stable connection between the upper and lower four assembly frames, enabling them to form a cohesive whole and improving the vertical load-bearing capacity and deformation resistance of the entire sandwich panel structure. Second sliding grooves 21 are respectively provided on the four sides of the connecting ribs 2. The second sliding grooves 21 are structurally compatible with the first sliding grooves 11 and are also used to facilitate the installation and sliding of the first bolts 4, ensuring the positional adjustability of the connecting ribs 2 when connected to the reinforcing ribs 1.

[0031] Connectors 3 are provided at the joints between reinforcing ribs 1 and between reinforcing ribs 1 and connecting ribs 2. A first bolt 4 passes through each connector 3. Connectors 3 are L-shaped, adapting to the right-angle connection requirements between reinforcing ribs 1 and between reinforcing ribs 1 and connecting ribs 2, enabling a vertical and stable connection between the two components. Connecting holes 31 are provided on the connector 3 at corresponding positions to the reinforcing ribs 1 and connecting ribs 2, providing a passage for the first bolt 4 to pass through, ensuring precise connection between the connector 3 and the corresponding component. The first bolt 4 passes through the connecting hole 31, and its head slides in either the first groove 11 or the second groove 21. Through the cooperation of the bolt and the groove, the connection position can be fine-tuned during assembly, ensuring connection accuracy.

[0032] A nut 41 is threaded onto the first bolt 4. The nut 41 cooperates with the first bolt 4 to secure the connector 3 to the reinforcing rib 1 and connecting rib 2, ensuring the stability of the connection and preventing loosening during use. A washer 42 is fitted onto the first bolt 4, located between the connector 3 and the nut 41. The washer 42 increases the contact area between the nut 41 and the connector 3, dispersing the pressure applied by the nut 41 and preventing damage to the connector 3 due to excessive local pressure. It also improves the anti-loosening performance of the threaded connection. It should be noted that in this embodiment, the first bolt 4 is a torsion-shear type high-strength bolt. It has high strength, can meet the stress requirements of large-span structures, is easy to install, and its quality is easy to guarantee. It can achieve single-sided tightening, requires no special skills from operators, and can further improve on-site assembly efficiency.

[0033] For further details, please refer to Figure 3 and Figure 4 The aforementioned sandwich panel structure also includes multiple sets of second bolts 5. These second bolts 5 are located at the top of the upper assembly frame and function as shear studs, enhancing the shear resistance between the upper assembly frame and the thin concrete slab, and preventing relative slippage between the thin concrete slab and the assembly frame. The upper surface of the upper assembly frame is covered with a thin concrete slab, which serves as the top load-bearing and protective component of the sandwich panel structure. It can bear the upper load and transfer it to the assembly frame, while also providing a flat top surface for the building. The thin concrete slab is penetrated by the second bolts 5, and a two-way steel mesh is installed within the thin concrete slab. This two-way steel mesh enhances the tensile and crack resistance of the thin concrete slab, preventing cracks from forming under stress or temperature changes.

[0034] Finally, the aforementioned sandwich panel structure includes a positioning component 6 mounted on the second bolt 5. The positioning component 6 is used to fix the second bolt 5, ensuring its stable position during use and guaranteeing its shear stud performance. The positioning component 6 includes a movable piece 61 threadedly connected to the second bolt 5. When the second bolt 5 rotates, it moves along its own length. The movable piece 61 drives the positioning plate 65 to adjust its position, providing power transmission for locking the positioning component 6. Limiting strips 62 are fixedly connected to both sides of the movable piece 61. The two sets of limiting strips 62 are slidably connected to both sides of the first slide groove 11. The core function of the limiting strips 62 is to prevent the movable piece 61 from rotating synchronously when the second bolt 5 rotates, ensuring that the second bolt 5 can smoothly achieve its axial movement when rotating.

[0035] The bottom of the movable piece 61 is fixedly connected to an inner ring 63, and the outer ring 64 is rotatably connected to the outer ring of the inner ring 63. The cooperation between the inner ring 63 and the outer ring 64 allows the movable piece 61 to move synchronously with the positioning plate 65 when it moves. The distance between the movable piece 61 and the positioning plate 65 is adjustable to ensure that the rotation of the movable piece 61 is not transmitted to the positioning plate 65, thus ensuring the smooth movement of the positioning plate 65. The bottom of the outer ring 64 is fixedly connected to the positioning plate 65, which is slidably connected in the first slide groove 11. The positioning plate 65 and the movable piece 61 cooperate to form a clamping structure. When the second bolt 5 rotates, one end contacts the positioning plate 65. As the second bolt 5 moves, the positioning plate 65 and the movable piece 61 move away from each other, thereby locking the entire positioning assembly 6 in the first slide groove 11. This fixes the position of the second bolt 5 and ensures a stable connection between the second bolt 5 and the concrete slab and the assembly frame.

[0036] In this embodiment, the prefabricated units are first assembled. Based on the building plan requirements, two sets of reinforcing ribs 1 form an L-shaped structure, three sets form a U-shaped structure, and four sets form a square structure. These reinforcing ribs 1 are connected and fixed using connectors 3 and first bolts 4, forming a four-layer rectangular grid frame assembly, suitable for the layout requirements of large-span buildings. Then, connecting ribs 2 are connected between the assembly frames using connectors 3 and first bolts 4, achieving overall fixation of the four-layer assembly frames and forming a complete grid frame body. Next, second bolts 5 are installed on the reinforcing ribs 1 of the upper assembly frame and fixed using positioning components 6. Finally, a pre-reserved concrete slab with openings matching the second bolts 5 is placed over the upper surface of the upper assembly frame, allowing the second bolts 5 to penetrate the concrete slab, completing the assembly of the entire structure. During assembly, when tightening the first bolts 4, the principle of tightening the bolts diagonally in sequence is followed to ensure uniform stress on the connection nodes and improve the quality of structural assembly.

[0037] In the four-layer assembly frame, the arrangement of each layer of reinforcing ribs 1 has been optimized: the first layer of reinforcing ribs 1 is located at the top of the hollow sandwich panel; the second layer of reinforcing ribs 1 is located at 1 / 4 of the total height of the hollow sandwich panel from the top; the third layer of reinforcing ribs 1 is located at 1 / 4 of the total height of the hollow sandwich panel from the bottom; and the fourth layer of reinforcing ribs 1 is located at the bottom of the hollow sandwich panel. This arrangement is based on the structural stress characteristics, keeping the material away from the neutral axis, which increases the moment of inertia of the section, enhances the structure's resistance to bending moments, and thus allows it to withstand greater loads.

[0038] The above specific embodiments are merely optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A fully prefabricated steel-concrete composite hollow sandwich panel structure, characterized in that, include: The four-layer assembly frame, the second layer of the assembly frame is located at 1 / 4 of the total height of the hollow sandwich panel from the top, the third layer of the assembly frame is located at 1 / 4 of the total height of the hollow sandwich panel from the bottom, and the four-layer assembly frame includes multiple prefabricated units, each of which includes multiple sets of reinforcing ribs (1). The connecting rib (2) is provided between the four-layer assembly frame. The connecting rib (1) and the connecting rib (2) are provided with connecting parts (3). The connecting parts (3) are provided with first bolts (4). Multiple sets of second bolts (5) are provided on the top of the upper assembly frame. The upper surface of the upper assembly frame is covered with a thin concrete plate, which is penetrated by the second bolts (5). The positioning component (6) is disposed on the second bolt (5) and is used to fix the second bolt (5).

2. The fully prefabricated steel-concrete composite hollow sandwich panel structure according to claim 1, characterized in that, The reinforcing rib (1) is a quadrangular prism, and the four sides of the reinforcing rib (1) are respectively provided with a first sliding groove (11).

3. The fully prefabricated steel-concrete composite hollow sandwich panel structure according to claim 2, characterized in that, The connecting rib (2) is a quadrangular prism, and the four sides of the connecting rib (2) are respectively provided with a second sliding groove (21).

4. The fully prefabricated steel-concrete composite hollow sandwich panel structure according to claim 3, characterized in that, The connector (3) is L-shaped. The connector (3) has connecting holes (31) at positions corresponding to the reinforcing rib (1) and the connecting rib (2). The first bolt (4) passes through the connecting hole (31). The head of the first bolt (4) is slidably connected to the first groove (11) or the second groove (21). The first bolt (4) is threaded with a nut (41).

5. A fully prefabricated steel-concrete composite hollow sandwich panel structure according to claim 4, characterized in that, A washer (42) is fitted on the first bolt (4), and the washer (42) is located between the connector (3) and the nut (41).

6. The fully prefabricated steel-concrete composite hollow sandwich panel structure according to claim 1, characterized in that, The positioning component (6) includes a movable piece (61) threaded onto the second bolt (5), and limit strips (62) are fixedly connected to both sides of the movable piece (61), and the two sets of limit strips (62) are slidably connected to both sides of the first groove (11).

7. A fully prefabricated steel-concrete composite hollow sandwich panel structure according to claim 6, characterized in that, The bottom of the movable piece (61) is fixedly connected to an inner ring (63), and the outer ring (64) is rotatably connected to the outer ring (63). The bottom of the outer ring (64) is fixedly connected to a positioning plate (65), and the positioning plate (65) is slidably connected in the first groove (11).

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