An interlayer sliding connection node of a prefabricated component and an installation method thereof

Abstract

The present application provides an interlayer sliding connection node of a prefabricated component and an installation method thereof, which belongs to the field of construction engineering technology. The invention comprises a gasket, which is arranged between a PEC shear wall and the fully prefabricated floor slabs on both sides thereof, so as to realize the sliding connection between the adjacent fully prefabricated floor slabs and the PEC shear wall. The floor slab can produce the expected sliding under the action of an earthquake, and consume part of the earthquake energy. The overall structure is simple and reliable, and the embedded parts can be quickly connected on site, which simplifies the construction process and improves the work efficiency.

Description

Technical Field

[0001] The present application relates to an interlayer sliding connection node of a prefabricated component and an installation method thereof, and belongs to the technical field of construction engineering. Background Art

[0002] As the construction industry develops towards industrialization and informatization, prefabricated steel structure buildings have received widespread attention due to their short construction period, low environmental pollution and high construction quality. Among them, fully prefabricated floor slabs, as one of the important components of prefabricated steel structure buildings, play a key role in improving building efficiency and ensuring structural performance. However, the effective connection between the fully prefabricated floor slabs and the main beams or secondary beams has always been a key factor affecting the overall structural stability and bearing capacity.

[0003] Traditionally, the connection between floor slabs and beams and columns is mostly made by cast-in-place concrete. Although this method can provide a good rigid connection, it has disadvantages such as long construction time and large amount of wet work on site. In recent years, with the development of prefabricated component technology, people have begun to explore more efficient and convenient connection methods. It is a common method to achieve rapid assembly of prefabricated floor slabs and steel beams by using embedded parts (such as bolts, steel plates), welding or other forms of mechanical connection, such as Figure 1 As shown, the steel beam 1a and the bottom plate 2a are connected by a shear connector 4a, and the bottom plate 2a and the laminated layer 3a are connected by a transverse reinforcement 5a; Figure 2 As shown in the figure, a steel column (or precast concrete column) 3b is fixed between the cross beam 1b and the longitudinal beam 2b, and the cross beam 1b, the longitudinal beam 2b and the bottom plate 4b are reinforced with reinforcing ribs 5b, which is also the recommended method of the Technical Specification for Partially Enclosed Steel-Concrete Composite Structures TCECS 719-2020. This type of new connection technology not only simplifies the construction process, but also improves work efficiency and reduces the impact on the environment and labor requirements. Summary of the invention

[0004] In view of this, the present application first provides an inter-layer sliding connection node of prefabricated components, which provides a displacement space to resist vibration for a building containing such a connection node through a sliding connection between adjacent fully prefabricated floor slabs on the same floor, thereby improving the stability of the building.

[0005] Specifically, the present application is implemented through the following scheme: An interlayer sliding connection node of a prefabricated component, the sliding connection node comprises a gasket, and the gasket is arranged between a PEC shear wall and fully prefabricated floor slabs on both sides thereof to achieve a sliding connection between adjacent fully prefabricated floor slabs and the PEC shear wall.

[0006] Further, as a preference: The PEC shear wall is provided with a stiffening plate, which protrudes laterally to the outside of the shear wall to form a shelf surface, and the fully prefabricated floor slab is overlapped on the shelf surface, and the gasket is located between the shelf surface and the fully prefabricated floor slab. More preferably, the stiffening plate, the gasket and the fully prefabricated floor slab are fixed with bolts. The above-mentioned structural setting of the gasket can alleviate the shock effect and avoid the damage of the fully prefabricated floor slab structure caused by the rigid connection. One end of the fully prefabricated floor slab overlapped with the shelf surface is thinned, and after the overlap is completed, concrete is poured at the overlap position to form a flange.

[0007] The adjacent fully prefabricated floor slabs are two fully prefabricated floor slabs at the same height, or one of them may be a settlement floor slab. In this case, the settlement floor slab and the adjacent floor slabs are at different heights, and the settlement floor slab and the adjacent floor slab are fixedly connected by anchors.

[0008] More preferably, Concrete is poured between the fully prefabricated floor slab and the PEC shear wall to form a flange. Preferably, mortar is poured between the PEC shear wall and the flange for sealing.

[0009] The fully prefabricated floor slab is overlapped on the steel beam, and a gasket is also arranged between the steel beam and the fully prefabricated floor slab. The gasket is a polytetrafluoroethylene (PTFE) gasket with a low friction coefficient, which is easy to slide.

[0010] The applicant also provides a method for installing the interlayer sliding connection node of the above-mentioned prefabricated component, the steps are as follows: Step 1: According to the building requirements, manufacture several fully prefabricated floor slabs and reserve installation holes or embed connection parts.

[0011] Step 2: Install the gasket on the fully prefabricated floor slab and adjust it to a suitable position; Step 3: hoist the fully prefabricated floor slab and place the fully prefabricated floor slab and gasket on the placing table of the PEC shear wall; Step 4: Install the connectors into the reserved installation holes, and cast in-situ concrete at the junction of the fully prefabricated floor slabs, PEC shear walls, and connectors to make flanges.

[0012] In the above scheme, the joint between the PEC shear wall and the fully prefabricated floor slab can be roughened, and the cast-in-place concrete can be used to ensure the firmness of the flange forming.

[0013] The present invention introduces gaskets between prefabricated components. Through the connection between the gaskets and the prefabricated components, the floor slab can produce expected sliding under the action of an earthquake, consuming part of the earthquake energy. With the on-site quick connection of embedded parts, the construction process is simplified and work efficiency is improved. The overall structure is simple and reliable, and it is easy to promote and apply to various prefabricated steel structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a conventional connection node structure between prefabricated floor slabs and steel beams; Figure 2 It is another conventional connection node structure between precast floor slabs and steel beams; Figure 3 This is a schematic diagram of the structure of the interlayer sliding connection node of the present application; Figure 4 A schematic diagram of a three-dimensional structure of an interlayer sliding connection node of the present application; Figure 5 for Figure 3 Sectional view in the middle MM direction; Figure 6 This is another three-dimensional structural schematic diagram of the interlayer sliding connection node of the present application; Figure 7 for Figure 3 Cross-section along the NN direction.

[0016] Numbers in the figure: 1. Gasket; 2. PEC shear wall; 21. Flange 1; 22. Mortar layer; 23. Reinforcement ribs; 24. Stiffener 1; 3. Fully precast floor slab; 31. Floor slab 1; 32. Floor slab 2; 33. Floor slab 3; 34. Stiffener 2; 35. Anchor; 36. Flange 2; 37. Thinning area; 4. Steel beam; 5. Bolt. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the technical solutions in the embodiments of this application will be further described in detail below in conjunction with the drawings in the embodiments of this application. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit the technical solutions of this application. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0018] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and should not be construed as limitations on the present technical solution.

[0019] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0020] The present application provides an interlayer sliding connection node of a prefabricated component. The embodiments of the present application are described below in conjunction with the accompanying drawings.

[0021] See also Figure 3 , Figure 3 The plan view of the sliding connection node of this embodiment is shown. The sliding connection node includes a gasket 1, which is connected between the PEC shear wall 2 and the fully prefabricated floor slabs on both sides thereof, namely, floor slab 1 31 and floor slab 2 32, to achieve inter-layer sliding connection between adjacent fully prefabricated floor slabs 3.

[0022] Among them, combined Figure 4 , Figure 5 : A PEC shear wall 2 is constructed on the steel beam 4. The PEC shear wall 2 is provided with longitudinal reinforcing ribs 23 and transverse reinforcing plates 24. The reinforcing ribs 23 are located inside the PEC shear wall 2. The reinforcing plates 24 penetrate the PEC shear wall 2 and protrude on both sides of the PEC shear wall 2 to form a shelf surface.

[0023] Floor slab 1 31 and floor slab 2 32 are located on both sides of the PEC shear wall 2. One end of floor slab 1 31 and floor slab 2 32 facing the PEC shear wall 2 is thinned to form a thinning area 37. A gasket 1 is installed on the bottom side of the fully prefabricated floor slab corresponding to the thinning area 37, and the end corresponding to the thinning area 37 is overlapped on the above-mentioned shelf surface.

[0024] The bolt 5 passes through the thinned area 37 , the gasket 1 and the stiffening plate 24 to complete the connection between the PEC shear wall 2 and the fully prefabricated floor slab 3 .

[0025] During the process of prefabricated construction and hoisting, it is difficult to achieve absolute precision for the prefabricated floor slabs. The setting of the gasket 1 with a low friction coefficient (such as PTFE gasket) can allow a certain amount of sliding during the overlapping process to compensate for the small range of deviations that may occur during installation. This not only improves the construction efficiency, but also increases the fault tolerance rate. At the same time, the above connection between the gasket 1 and the fully prefabricated floor slab 3 and the PEC shear wall 2 gives the connection node a certain degree of freedom within a certain range, allowing limited relative movement between the fully prefabricated floor slab 3 and the PEC shear wall 2. When shock occurs due to earthquakes and other reasons, the above degree of freedom and a certain degree of allowed sliding can absorb and disperse the shock energy, reduce the damage to the overall structure, and enhance the earthquake resistance of the building.

[0026] remove Figure 4 , Figure 5 In addition to the case where adjacent fully prefabricated floor slabs 3 are at the same height, there are also cases in which Figure 6 , Figure 7 In the case shown, the fully prefabricated floor also includes floor 3 33, which is a settlement floor, whose edge is at the same level as the adjacent floor 1 31, but the whole is at a lower position relative to floor 1 31. At this time, floor 1 31 and floor 3 33 are fixedly connected by anchors 35, and the fixed connection point is between the PEC shear wall 2 and the steel beam 4.

[0027] Construction method: Step 1: According to the building requirements, several fully prefabricated floor slabs 3 are manufactured, and installation holes or pre-embedded connectors are reserved at designated locations.

[0028] Step 2: Install the gasket 1 on the bottom surface of the fully prefabricated floor slab 3 and adjust it to a suitable position.

[0029] Step three, the steel beam 4 with the PEC shear wall 2 can also be called a PEC steel beam. At the overlap position (such as above the stiffening plate 24), the PEC shear wall 2 is pre-roughened, and then mortar is poured to form a mortar layer 22. At the construction site, the fully prefabricated floor slab 3 is hoisted to the vicinity of the above-mentioned roughened position of the PEC shear wall 2, the fully prefabricated floor slab 3 and the gasket 1 are placed on the stiffening plate 24, and the bolts 5 are installed.

[0030] The steel beam 4 without the PEC shear wall 2 can also be called a full steel beam. When the full prefabricated floor slab 3 is overlapped, the flange 2 36 at the overlapped edge can be directly placed on the corresponding steel beam 4 (see Figure 3 , Figure 4 Gaskets 1 may also be installed between the steel beams 4 and the fully prefabricated floor slabs 3 in the manner described above to enhance the sliding properties between the connection nodes.

[0031] Step 4: insert the connectors into the reserved installation holes to fix the fully prefabricated floor 3. Finally, cast concrete at the intersection of the fully prefabricated floor 3, the PEC shear wall 2 and the steel beam 4, the roughening position, the connectors, and the thinning area 37 to make a flange 21.

[0032] The above sliding connection node is mainly composed of a fully prefabricated floor 3, a gasket 1, a stiffening plate 34, etc. The gasket 1 is located on the side where the fully prefabricated floor 3 is connected to the steel structure (PEC shear wall 2, steel beam 4, etc. mentioned above), and its material is selected to have a material with a low friction coefficient, such as polytetrafluoroethylene, to facilitate sliding. The upper and lower floors (such as floor 1 31 and floor 3 33) are connected by fixing bolts or anchors 35, and the main body of the PEC shear wall 2 is roughened, and then the fully prefabricated floor 3 is partially cast in situ to enhance the adhesion and waterproof performance between the fully prefabricated floor 3 and the PEC shear wall 2. The gasket 1 realizes its stability and resilience within the predetermined sliding range.

[0033] The above-mentioned embodiments only express several feasible implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention, and the embodiments are not used to limit the scope of protection in the claims of the present invention. For ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and all equivalent implementations or changes that do not depart from the present invention should be included in the technology of the present invention.

Claims

1. An interlayer sliding connection node of a prefabricated component, characterized in that: It comprises a gasket, which is arranged between the PEC shear wall and the fully prefabricated floor slabs on both sides thereof, so as to realize the sliding connection between the adjacent fully prefabricated floor slabs and the PEC shear wall.

2. The interlayer sliding connection node of a prefabricated component according to claim 1, characterized in that: A stiffening plate is arranged inside the PEC shear wall, and the stiffening plate protrudes laterally outward from the shear wall to form a shelf surface, the fully prefabricated floor slab is overlapped on the shelf surface, and the gasket is located between the shelf surface and the fully prefabricated floor slab.

3. The interlayer sliding connection node of a prefabricated component according to claim 2, characterized in that: The stiffening plates, gaskets and the fully prefabricated floor slabs are fixed with bolts.

4. The interlayer sliding connection node of a prefabricated component according to claim 2, characterized in that: One end of the fully prefabricated floor slab overlapped with the shelf table is thinned, and after the overlap is completed, concrete is poured at the overlap position to form a flange.

5. The interlayer sliding connection node of a prefabricated component according to claim 4, characterized in that: Mortar is poured between the PEC shear wall and the flange for sealing.

6. The interlayer sliding connection node of a prefabricated component according to claim 1, characterized in that: The fully prefabricated floor slab includes a settlement floor slab, which is at a different height from an adjacent floor slab, and the settlement floor slab is fixedly connected to the adjacent floor slab by anchoring pieces.

7. The interlayer sliding connection node of a prefabricated component according to claim 1, characterized in that: The fully prefabricated floor slab is overlapped on the steel beam, and a gasket is also arranged between the steel beam and the fully prefabricated floor slab.

8. An interlayer sliding connection node of a prefabricated component according to any one of claims 1 to 7, characterized in that: The gasket is a polytetrafluoroethylene gasket.

9. A method for installing an interlayer sliding connection node of a prefabricated component, characterized in that: Here are the steps: Step 1: manufacture several fully prefabricated floor slabs according to building requirements; Step 2: Install the gasket on the fully prefabricated floor slab; Step 3: hoist the fully prefabricated floor slab and overlap the fully prefabricated floor slab and gaskets on the PEC shear wall; Step 4: Install connectors between the fully precast floor slab and the PEC shear wall, and cast-in-place concrete is used to make flanges at the junction of the fully precast floor slab, the PEC shear wall and the connectors.

10. The method for installing an interlayer sliding connection node of a prefabricated component according to claim 9, characterized in that: The joints between the PEC shear wall and the fully prefabricated floor slab are roughened and matched with cast-in-place concrete to ensure the firmness of the flange forming.

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