Beam slab structure convenient for replacing concrete panel

Abstract

The utility model belongs to the field of structural engineering, and particularly relates to a beam plate structure convenient for replacing a concrete panel, which comprises a panel main body, reinforcing steel bars, positioning embedded parts, shear keys, bolts and beam grids, the reinforcing steel bars are embedded in the panel main body; the positioning embedded parts are arranged in notches formed in the panel main body at intervals in the circumferential direction, and are welded and fixed with the reinforcing steel bars; embedding parts matched with the positioning embedded parts are arranged at the two ends of the shear key, and the adjacent panel main bodies are connected by embedding the embedding parts at the two ends into the positioning embedded parts; through bolt holes are respectively formed in the embedding parts at the two ends of the shear key; and the bolts are arranged in the bolt holes of the shear keys and are used for connecting the panel main body and the beam lattice. Compared with the prior art, the utility model solves the problem in the prior art that the panel which is easy to damage is difficult to replace due to the fact that an assembled structure adopts permanent connection. According to the scheme, the tenon-and-mortise connection structure is adopted, all the concrete panels can be tightly connected with the beam, and replacement can be conveniently carried out.

Description

Technical Field

[0001] This utility model belongs to the field of structural engineering, and specifically relates to a beam-slab structure that facilitates the replacement of concrete panels. Background Technology

[0002] In recent years, as my country's structural construction industry has continued to move towards high-quality development, industrialized construction models have been continuously promoted and broken through, and prefabricated structures, as a structural form with industrialized construction characteristics, have been increasingly widely used.

[0003] Despite over thirty years of application experience with prefabricated structures in my country, many details still warrant improvement to fully unleash their potential. The industrial characteristics that have been emphasized in prefabricated structures are actually only briefly reflected during the construction process, and during operation, they offer no advantage over other structural forms in terms of replacing damaged components.

[0004] For example, CN115977290A discloses a fully precast floor slab connection node, including a fully precast floor slab and steel beams. The fully precast floor slab includes a floor slab body, with shear keyways spaced apart on the end face of the floor slab body. The shear keyways are recessed into the floor slab body and open on the outside. Exposed reinforcing bars are spaced apart on the end face of the shear keyways, with a closed U-shaped structure. Bolt holes are opened along the thickness direction of the floor slab body, penetrating the inner cavity of the shear keyway. Sleeves are pre-embedded on the inner wall of the shear keyway opposite to the bolt holes. When connecting the floor slabs, the reinforcing bars at the ends of the two fully precast floor slabs are staggered. A shear steel plate is inserted into each shear keyway, with holes in the shear steel plate. The shear steel plate is fixed in the shear keyway with bolts. Longitudinal reinforcement bars are placed inside the reinforcing bars and tied to the reinforcing bars. Concrete is poured at the joint of the two fully precast floor slabs. This scheme improves the overall load-bearing capacity and tensile and shear resistance of the floor slab by pre-setting shear keyways and reinforcing bars at the connection nodes of the fully precast floor slab and using shear steel plates and longitudinal steel bars to form small hidden beams. However, this technical solution still requires a permanent connection similar to a post-cast wet joint for final fixation, which makes it difficult to replace damaged components even though it can improve structural strength.

[0005] In prefabricated structures, panels are the components that directly bear the load. If they can be quickly and easily replaced, the design scheme will have a significant advantage, given their susceptibility to damage. Utility Model Content

[0006] The purpose of this invention is to provide a beam-slab structure that facilitates the replacement of concrete panels, thereby addressing at least one of the aforementioned problems. This solves the problem in existing prefabricated structures where permanent connections make it difficult to replace easily damaged panels. This solution employs a mortise and tenon joint structure, which tightly connects each concrete panel to the beam grid and allows for convenient replacement.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A beam-slab structure that facilitates the replacement of concrete panels includes a panel body, reinforcing bars, positioning embedded parts, shear keys, bolts, and beam grids;

[0009] The steel bars are embedded inside the panel body;

[0010] The positioning embedded parts are set in the slots opened at intervals along the circumference of the panel body, and the positioning embedded parts are welded and fixed to the reinforcing bars.

[0011] The anti-shear key has two ends respectively set as fitting parts that match the positioning embedded parts. The anti-shear key is fitted into the positioning embedded parts through the fitting parts at both ends to connect the adjacent panel body; the anti-shear key has through bolt holes at the fitting parts at both ends respectively.

[0012] The bolts are installed in the bolt holes of the shear key and are used to connect the panel body and the beam grid;

[0013] The concrete panel consists of the main panel body, reinforcing bars, positioning embedded parts, and shear keys.

[0014] Preferably, the thickness of the panel body is 240~400mm, the length of the panel body is 4000~12000mm, and the width of the panel body is 1000~4000mm.

[0015] The main body of the panel is made of concrete with a strength grade of C40 or higher.

[0016] Preferably, the reinforcing bars include transverse reinforcing bars arranged along the length of the panel body and longitudinal reinforcing bars arranged along the width of the panel body.

[0017] The transverse reinforcing bars and the longitudinal reinforcing bars are welded and fixed at their intersections to form an integral frame.

[0018] Preferably, the transverse reinforcing bars and the longitudinal reinforcing bars are each configured as a two-layer structure.

[0019] Preferably, the vertical distance from the outermost end of the reinforcing bar to the surface of the panel body is greater than or equal to 30 mm.

[0020] Preferably, the slots spaced apart around the circumference of the panel body are U-shaped or horseshoe-shaped structures with tapered ends; the positioning embedded parts are made of stainless steel, and the shape of the positioning embedded parts is set to correspond to the shape of the slots on the panel body.

[0021] Preferably, the anti-shear key is an 8-shaped structure with both ends wider than the middle. The anti-shear key is fitted with the positioning embedded part through the fitting parts formed at both ends, so that the adjacent panel bodies form a tenon and mortise connection structure.

[0022] The shear key is made of stainless steel.

[0023] Preferably, the shear key has an axisymmetric structure.

[0024] Preferably, the concrete panels are stacked on the surface of the beam grid;

[0025] The surface of the beam grid has bolt holes corresponding to the bolt installation positions;

[0026] The concrete panel is fixedly connected to the beam grid by bolts sequentially connecting the bolt holes on the shear keys and the bolt holes on the beam grid.

[0027] Preferably, the beam grid includes steel plate beams and steel box beams;

[0028] The bolt holes are located on the upper flange of the beam grid.

[0029] The working principle of this utility model is as follows:

[0030] This scheme is based on the concept of modular construction and uses shear key construction to achieve mortise and tenon structure connection. The concrete panels are thus connected to form a reliable whole, and the concrete panels are further connected to the beam grid with bolts.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] Traditional prefabricated structures only briefly demonstrate industrialization during construction, while damaged panels are inconvenient to replace during operation / use. This solution avoids permanent structures like post-cast wet joints, employing a fully modular connection structure that allows for quick replacement of damaged panels without damaging other parts, improving the long-term performance and ease of replacement of the prefabricated structure. Furthermore, compared to existing structures that use bolts to connect concrete panels and beams, this solution avoids applying bolt preload directly to the concrete panel and prevents loosening due to long-term creep, significantly improving its reliability. Attached Figure Description

[0033] Figure 1This is a schematic diagram of the planar structure of the concrete panel;

[0034] Figure 2 This is a schematic diagram of the planar structure of the reinforcing steel bars in a concrete panel.

[0035] Figure 3 This is a schematic diagram of the planar structure of the beam-slab structure;

[0036] Figure 4 A three-dimensional structural diagram of a beam-slab structure;

[0037] Figure 5 This is a schematic cross-sectional view of the beam-slab structure at the shear key section.

[0038] Figure 6-9 This is a schematic diagram of the structural installation of a beam-slab structure, in which... Figure 6 Beam grid structure Figure 7 The positioning of the concrete panel on the beam grid. Figure 8 Assembly of shear keys in concrete panels Figure 9 The assembly of bolts in beam and slab structures;

[0039] In the diagram: 1-panel body; 2-reinforcing steel; 3-positioning embedded parts; 4-shear key; 5-bolt; 6-beam grid. Detailed Implementation

[0040] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The purpose and effects of the present invention will become clearer. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0041] In the description of the embodiments of this utility model, if the description of the orientation, such as "up", "down", "left", "right", "front", "back", etc., is based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] Example

[0043] A beam-slab structure that facilitates the replacement of concrete panels, such as Figure 1-9 As shown, it includes panel body 1, steel bars 2, positioning embedded parts 3, shear keys 4, bolts 5, and beam grid 6;

[0044] The steel bars 2 are embedded inside the panel body 1;

[0045] The positioning embedded part 3 is set in the slots opened at intervals along the circumference of the panel body 1, and the positioning embedded part 3 is welded and fixed to the reinforcing bar 2.

[0046] The anti-shear key 4 has two ends respectively set as fitting parts that match the positioning embedded part 3. The anti-shear key 4 is fitted into the positioning embedded part 3 through the fitting parts at both ends to connect the adjacent panel body 1. The anti-shear key 4 has through bolt holes at the fitting parts at both ends respectively.

[0047] The bolts 5 are installed in the bolt holes of the shear key 4 and are used to connect the panel body 1 and the beam grid 6;

[0048] The concrete panel consists of panel body 1, reinforcing steel 2, positioning embedded parts 3, and shear keys 4.

[0049] In this beam-slab structure, the concrete panel is stacked on the surface of the beam grid 6;

[0050] The surface of the beam grid 6 is provided with bolt holes corresponding to the positions where the bolts 5 are installed;

[0051] The concrete panel is fixedly connected to the beam grid 6 by bolts 5 sequentially connecting to the bolt holes on the shear key 4 and the bolt holes on the beam grid 6.

[0052] More specifically, in this embodiment:

[0053] like Figure 1 and Figure 2 As shown, a beam-slab structure with a quickly replaceable concrete panel is disclosed. This structure includes a concrete panel and a beam grid 6. Specifically, the concrete panel comprises five components: a panel body 1, reinforcing bars 2 embedded within the panel body 1, positioning anchors 3 connected to the edge of the panel body 1, butterfly-shaped shear keys 4, and high-strength bolts 5 for steel-concrete connection. The internal reinforcing bars 2 are arranged in both longitudinal and transverse directions, each with a double layer, forming a frame within the panel body 1 and limiting crack propagation. Grooves are cut along the perimeter of the concrete panel at standard intervals. The positioning anchors 3 are placed within these grooves, further working in conjunction with the butterfly-shaped shear keys 4 and the high-strength bolts 5 to achieve fixed connections between concrete panels and between the concrete panel and the beam grid 6, thus simultaneously connecting with surrounding concrete panels and the beam grid 6.

[0054] Furthermore, the main body 1 of the concrete panel is a flat rectangular prism. Its thickness can be selected from 240mm to 400mm according to actual design requirements, its length can be selected from 4000mm to 12000mm according to actual requirements, and its width can be selected from 1000mm to 4000mm according to actual requirements. The concrete grade should be selected from concrete materials with a strength grade of C40 or above.

[0055] Furthermore, the internal reinforcing bars 2 consist of four layers in the thickness direction of the concrete panel, with two layers arranged along the length direction and two layers arranged along the width direction, in an alternating manner. The longitudinal and transverse reinforcing bars are connected by spot welding at their intersections to form an integral frame. The distance between the outermost edge of the outermost reinforcing bar 2 and the outer surface of the concrete panel (the thickness of the protective layer) should not be less than 30 mm.

[0056] Furthermore, the positioning embedded part 3 is made of stainless steel and matches the groove shape of the panel body 1, adopting a near-circular groove shape, such as a U-shaped structure or a horseshoe-shaped structure with a tapered opening; the positioning embedded part 3 is arranged along the edge of the panel body 1 at a certain standard interval. The positioning embedded part 3 is connected to the steel bar 2 inside the panel body 1 by welding, so that it can become part of the whole concrete panel during the prefabrication stage.

[0057] Furthermore, such as Figure 3 and Figure 4 As shown, the butterfly-shaped shear key 4 is made of stainless steel, with a cross-section that is narrow in the middle and wide at both ends, resembling an 8. Each end has two axially symmetrical and continuous bolt holes. The butterfly-shaped shear key 4 is used to tightly embed into the groove shape of the positioning embedded part 3 of two adjacent concrete panels, connecting them into an effective whole in a "puzzle" manner. This effectively limits misalignment and tension through the mechanical interlocking structure of the mortise and tenon joint, after which the concrete panels are installed onto the beam grid 6.

[0058] Furthermore, such as Figure 5 As shown, high-strength bolts 5 are inserted into the bolt holes of the butterfly shear key 4 and the corresponding bolt holes of the beam grid 6 located below the concrete panel, serving to connect the adjacent concrete panel to the beam grid 6 below and form an effective whole. The high-strength bolts 5 are also pre-tightened, and the concrete panel and beam grid 6 will share the load collaboratively during subsequent operation to resist sliding misalignment between the butterfly key and the beam grid 6.

[0059] Furthermore, the beam grid 6 is a steel plate beam or a steel box beam, and the upper flange plate has bolt holes at the corresponding positions of the bolt holes of the butterfly-shaped shear key 4, which are used to pass high-strength bolts 5 through the butterfly-shaped shear key 4 in sequence and connect them with the concrete panel to form an effective prefabricated composite structure.

[0060] The construction of this quick-replaceable concrete panel and beam-slab structure is achieved through the following steps, such as... Figure 6-9 As shown:

[0061] Step 1: Install precast beam grid 6:

[0062] The prefabrication of beam grid 6 was completed in the steel plant, and then transported to the site for hoisting and positioning.

[0063] Step 2: Positioning and placing the concrete panel:

[0064] After the prefabrication of the concrete panels is completed (using existing technology), they are stored for more than six months to eliminate most of the shrinkage effect, reduce the stress level of later cracking, and reduce the later load creep effect. Each concrete panel is then hoisted onto the already installed beam grid 6, and adhesive is applied to the mating surfaces of each concrete panel.

[0065] Step 3: Embed the butterfly-shaped shear key 4 into the positioning embedded part 3:

[0066] The stainless steel butterfly-shaped anti-shear key 4 is installed and embedded into the positioning embedded part 3 on the edge of the pre-positioned concrete panel. The embedding is made tight enough by hammering or other means. At this time, the precast concrete panels are connected into a reliable whole.

[0067] Step 4: Insert and tighten the high-strength bolt 5:

[0068] The high-strength bolts 5 are inserted into the bolt holes of the butterfly-shaped shear key 4 and simultaneously through the bolt holes of the upper flange plate of the lower beam grid 6. The high-strength bolts 5 are then tensioned on the lower surface of the upper flange plate of the beam grid 6 to form an effective preload. At this point, the concrete panel and the beam grid 6 combine to form an effective prefabricated composite structure. The concrete panel and the beam grid 6 will work together to bear the load during subsequent operation.

[0069] To address the issue of traditional prefabricated structures requiring damaging cuts to the original panels and incurring lengthy construction periods when replacing panels, this solution proposes a beam-slab structure based on modular construction principles, enabling rapid replacement of concrete panels. The design of this beam-grid 6 structure avoids permanent connections such as post-cast wet joints, instead employing butterfly-shaped shear keys 4, similar to mortise and tenon joints, to tightly connect each concrete panel to the beam-grid 6. The stainless steel butterfly-shaped shear keys 4 are embedded in grooves on the periphery of adjacent concrete panels, providing shear and pull-out restraints in a jigsaw-like manner, thus connecting the concrete panels into a reliable whole. Furthermore, high-strength bolts 5 are inserted into the bolt holes of the butterfly-shaped shear keys 4 and pass through the bolt holes of the upper flange plate of the beam-grid 6, ensuring a reliable and effective prefabricated composite structure connecting the concrete panels to the beam-grid 6.

[0070] This solution provides a beam-slab structure with rapidly replaceable concrete panels, which solves the problem in existing technologies that cannot quickly replace concrete panels damaged during operation, and provides an effective and novel solution for improving the durability of concrete panels.

[0071] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A beam-slab structure that facilitates the replacement of concrete panels, characterized in that, Includes panel body (1), steel bars (2), positioning embedded parts (3), shear keys (4), bolts (5) and beam grid (6); The steel bars (2) are embedded inside the panel body (1); The positioning embedded part (3) is set in the slots opened circumferentially in the panel body (1), and the positioning embedded part (3) is welded and fixed to the reinforcing bar (2); The anti-shear key (4) has two ends respectively set as fitting parts that match the positioning embedded part (3). The anti-shear key (4) is fitted into the positioning embedded part (3) through the fitting parts at both ends to connect the adjacent panel body (1). The anti-shear key (4) has through bolt holes at the fitting parts at both ends respectively. The bolts (5) are set in the bolt holes of the shear key (4) for connecting the panel body (1) and the beam grid (6). The concrete panel consists of the panel body (1), reinforcing bars (2), positioning embedded parts (3), and shear keys (4).

2. The beam-slab structure for easy replacement of concrete panels according to claim 1, characterized in that, The thickness of the panel body (1) is 240~400mm, the length of the panel body (1) is 4000~12000mm, and the width of the panel body (1) is 1000~4000mm. The panel body (1) is made of concrete with a strength grade of C40 or higher.

3. A beam-slab structure for easy replacement of concrete panels according to claim 1, characterized in that, The steel bars (2) include transverse steel bars arranged along the length of the panel body (1) and longitudinal steel bars arranged along the width of the panel body (1). The transverse steel bars and the longitudinal steel bars are welded and fixed at the intersection to form an integral frame (2).

4. A beam-slab structure for easy replacement of concrete panels according to claim 3, characterized in that, The transverse reinforcing bars and the longitudinal reinforcing bars are each configured as a two-layer structure.

5. A beam-slab structure for easy replacement of concrete panels according to claim 1, characterized in that, The vertical distance from the outermost end of the steel bar (2) to the surface of the panel body (1) is not less than 30mm.

6. A beam-slab structure for easy replacement of concrete panels according to claim 1, characterized in that, The grooves opened circumferentially on the panel body (1) are U-shaped or horseshoe-shaped structures with tapered openings; the positioning embedded part (3) is made of stainless steel and the shape of the positioning embedded part (3) is set to correspond to the shape of the groove on the panel body (1).

7. A beam-slab structure for easy replacement of concrete panels according to claim 1, characterized in that, The shear key (4) is an 8-shaped structure with both ends wider than the middle. The shear key (4) is fitted with the positioning embedded part (3) through the fitting parts formed at both ends, so that the adjacent panel bodies (1) form a mortise and tenon connection structure. The shear key (4) is made of stainless steel.

8. A beam-slab structure for easy replacement of concrete panels according to claim 1, characterized in that, The shear key (4) is an axisymmetric structure.

9. A beam-slab structure for easy replacement of concrete panels according to claim 1, characterized in that, The concrete panels are stacked on the surface of the beam grid (6); The surface of the beam grid (6) is provided with bolt holes corresponding to the positions where the bolts (5) are installed; The concrete panel is fixedly connected to the beam grid (6) by bolts (5) sequentially connecting the bolt holes on the shear key (4) and the bolt holes on the beam grid (6).

10. A beam-slab structure for easy replacement of concrete panels according to claim 9, characterized in that, The beam grid (6) mentioned above includes steel plate beams and steel box beams; The bolt holes are located on the upper flange of the beam grid (6).

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