CN114876262A - Laminated Shear Walls and Buildings - Google Patents

Abstract

The invention discloses a superposed shear wall and a building, wherein the superposed shear wall comprises an A-side concrete plate, a B-side concrete plate and a connecting part; the connecting part comprises a hidden supporting plate and a fastening piece, and the fastening piece comprises a screw and a nut; the screw penetrates through the thickness direction of the hidden support plate and extends out of the upper surface and the lower surface of the hidden support plate; at least one pair of nuts are respectively arranged on the screw rods positioned on the upper surface and the lower surface of the hidden support plate; the A-side concrete plate is fixed between and fixed by a pair of nuts located on the upper surface of the hidden support plate, and the B-side concrete plate is fixed between and fixed by a pair of nuts located on the lower surface of the hidden support plate. The added hidden support steel plate and the upper and lower wall connecting steel plates can be embedded into the shear wall to form a combined structure after pouring, so that concrete, reinforcing steel bars and steel plates can work in a trinity mode, the seismic performance of the shear wall is better, and the integrity between the upper and lower layers of shear walls is improved.

Description

Laminated Shear Walls and Buildings

technical field

The invention relates to the technical field of shear walls, in particular to a composite shear wall with steel plate support.

Background technique

Prefabricated buildings have many advantages such as fast construction speed, energy saving, environmental protection, labor saving, etc., and are one of the important directions for the country's vigorous promotion and future building development. Shear wall is a kind of structural wall, which mainly plays the role of wind resistance and earthquake resistance.

Laminated shear wall is a prefabricated component commonly used in the construction of prefabricated buildings. At present, the laminated concrete shear wall popularized in my country is mainly composed of steel bars and concrete. Its structural performance mainly includes weak vertical connection points and seismic defense lines. Single and other shortcomings.

In terms of construction, the distance between the concrete slabs of the traditional superimposed shear wall is relatively large, which leads to excessively thick concrete filling in the hollow cavity and the denser connecting rods between the slabs, which makes the on-site pouring more difficult.

In view of this, in-depth research is carried out on the problems existing in the above-mentioned existing laminated shear walls, and an effective reinforcement scheme with steel plates is provided for the traditional shear walls, so this invention is born.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the existing technology, the technical problem to be solved by the present invention is to provide a new type of superimposed shear wall with steel plate support and a building constructed by using the superimposed shear wall, which solves the problem of the existing superimposed shear wall. In the technology, the vertical connection points are weak, the seismic defense line is single, the concrete filling in the high-rise hollow cavity is too thick, the connecting rods are too dense, and the on-site pouring process is very cumbersome.

In order to solve the above-mentioned technical problems, the present invention is realized through the following technical solutions:

A superimposed shear wall, comprising a concrete slab on side A and a concrete slab on side B, is characterized in that: it further comprises a connecting part, and the concrete slab on side A and the concrete slab on side B are connected by the connecting part, Concrete is poured between the A-face concrete slab and the B-face concrete slab connected by the connecting member; the connecting member includes a concealed support plate and a fastener, and the fastener includes a screw rod and a nut; the screw rod penetrates the dark support The thickness direction of the plate extends from the upper surface and the lower surface of the dark support plate; at least a pair of said nuts are respectively provided on the screws located on the upper surface and the lower surface of the dark support plate; the A-face concrete plate is fixed on the dark support plate A pair of nuts on the upper surface of the support plate is fixed between and through the pair of nuts, and the B-face concrete plate is fixed between and through a pair of nuts on the lower surface of the dark support plate.

Pre-embedded sleeves are arranged in the connection holes between the A-side concrete slab and the B-side concrete slab and the screw rod.

The pre-embedded sleeve is welded with the steel mesh in the A-side concrete slab and the B-side concrete slab. The reinforced mesh is a reinforced mesh structure formed by the orthogonal arrangement of reinforcement bars or by welding.

A groove for embedding a nut in the fastener is provided outside the connection hole of the A-side concrete plate and the B-side concrete plate with the screw rod.

The dark support plate is an X-shaped steel plate with a middle intersection and four end nodes; the four end nodes are located at the four corners of the A-face concrete slab or the B-face concrete slab; at the middle intersection and each end node; Each end node is provided with at least one of the fasteners.

The screw is welded with the dark support plate or fixed with a nut.

The X-shaped steel plate is a perforated steel plate.

The connecting component also includes upper and lower wall connecting plates, the upper and lower wall connecting plates have two connecting parts, and the two dark support plates are connected into a whole through fasteners located on the dark support plates.

The upper and lower wall connecting plates are made of steel with holes; the connecting portion is provided with mounting holes matched with the screws of the fasteners.

The surface of the dark support steel plate and the upper and lower wall connecting steel plates is punched along the length direction. By punching the steel plate, steel can be saved, the integrity of the steel plate and the concrete can be easily realized, and the bonding force between the steel-concrete composite structure can be enhanced.

The dark supporting steel plates are reinforced and connected to form an "X" shape by using the screw and nuts, and the intersecting steel plates are arranged symmetrically in the center in the direction of the main view of the structure.

The upper and lower wall connecting steel plates are arranged in the center between the two concrete slabs of the upper and lower shear walls in the main view direction of the structure.

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

1. The steel, steel bars and concrete in the new type of superimposed shear wall can work in a trinity, so that the superimposed shear wall under this technical scheme can make full use of the excellent seismic performance of steel, and the additional hidden support steel plate inside makes the The strength, bearing capacity and integrity of the shear wall are significantly improved, which can effectively reduce the thickness of the shear wall, reduce the density of connecting steel bars between precast concrete slabs, and reduce the difficulty of pouring concrete at the construction site.

2. The vertical connection of the existing superimposed shear wall technology is to connect the upper and lower walls into a whole through the pre-embedded steel bars in the lower wall and the cast-in-place concrete of the wall cavity, and the upper and lower prefabricated wall shells are connected together. It is only connected by a thinner grouting, and the experimental study shows that this place is a weak link under the action of horizontal load. Aiming at the shortcomings of this technology, this scheme provides a steel plate connector between the upper and lower shear walls, which is reinforced with the concrete slab by screws and nuts. After pouring, the connector forms a whole with the upper and lower shear walls. It plays the role of a hidden support, enhances the connection strength of the upper and lower superimposed shear walls, and improves the overall lateral bearing capacity of the shear walls.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used to explain and illustrate the specific embodiments of the present invention together with the specific embodiments of the present invention, and do not constitute a limitation to the present invention.

Fig. 1 is the front structure schematic diagram of the superimposed shear wall of the present invention;

Fig. 2 is the side view sectional structure schematic diagram of the laminated shear wall according to the present invention;

Fig. 3 is the side view structural detail schematic diagram of the screw connection of the laminated shear wall according to the present invention;

FIG. 4 is a schematic diagram of the structure of the concealed supporting steel plate of the superimposed shear wall according to the present invention;

5 is a schematic diagram of the structure of the concealed support steel plate in which the superimposed shear wall adopts an X-shaped welding arrangement according to the present invention;

FIG. 6 is a schematic structural diagram of the upper and lower walls connecting steel plates of the superimposed shear wall according to the present invention;

7 is a schematic structural detail diagram of the connection between the screw and the steel plate of a new type of laminated shear wall with steel plate support according to the present invention;

FIG. 8 is a schematic structural diagram of the splicing of the screw rod of the superimposed shear wall and the A-surface concrete slab according to the present invention;

9 is a schematic structural diagram of the splicing of the X-shaped dark support steel plate, the upper and lower wall connecting steel plates and the A-surface concrete plate of the superimposed shear wall according to the present invention;

Fig. 10 is the overall structural schematic diagram after the assembly of the shear wall according to the present invention is completed;

Fig. 11 is a schematic diagram showing the details of the splicing structure of the superimposed shear wall according to the present invention;

Figure 12 is a schematic front view of the overall connection of the double-layer upper and lower shear walls of the superimposed shear wall according to the present invention;

13 is a schematic structural diagram of the reinforcing mesh sheet and the pre-embedded sleeve of the superimposed shear wall according to the present invention;

In the picture: 1. Concrete slab on A side; 2. Concrete slab on B side; 3. Reinforcement mesh; 4. Pre-embedded sleeve; 5. Dark support plate; 6. Upper and lower wall connecting plate; Nut; 9. Steel plate screw hole; 10. Steel plate punching.

Detailed ways

For a clearer understanding of the technical features, purposes and effects of the present invention, the technical solutions in the examples of the present invention will be clearly and completely described below with reference to the accompanying drawings in the implementation of the present invention.

As shown in the figure, the present invention provides a superimposed shear wall with steel plate hidden support, including A-face concrete slab 1, B-face concrete slab 2 and connecting parts, where the A-face concrete slab and B-face concrete slab connected by the connecting parts Concrete is poured between the face concrete slabs, and the A face concrete slab 1 , the B face concrete slab 2 and the connecting members are formed into a whole shear wall under stress by the post-cast concrete.

The structure of the connecting parts is shown in FIG. 9 , including dark support plates 5 , upper and lower wall connecting plates 6 and fasteners, wherein the fasteners include screws 7 and nuts 8 . The threaded rod 7 protrudes from both sides of the dark support plate 5 and has a pair of nuts 8 on each side, see FIG. 7 .

There are two ways to fix the screw 7 and the dark support plate 5: one is welding, which cannot be disassembled. The other is to fasten with nuts to achieve disassembly, see Figure 7 for this method.

The shape of the dark support plate 5 is designed as an X shape according to the square shape of the A-side concrete plate 1 and the B-side concrete plate 2, with a middle intersection and four end nodes; the four end nodes are located on the A-side concrete plate or B-side concrete plate. Four corners of the concrete slab; at least one fastener consisting of a screw rod 7 and a nut 8 is arranged at the middle intersection and each end node.

In the embodiment shown in Figure 9, two fasteners are provided at the mid-intersection and at each end node.

In one embodiment, the dark support plate 5 and the upper and lower wall connecting plates 6 are made of perforated steel plates.

The upper and lower wall connecting plates 6 are connected to the dark support plate 5 as a whole through the fasteners on the dark support plate 5 .

Reinforcement mesh sheets and pre-embedded sleeves are provided inside the concrete slabs 1 of the A side and the concrete slabs of the B side, and the pre-embedded sleeves are welded with the rebar mesh sheets. Insert the screw 7 of the fastener into the pre-embedded sleeve.

The construction of the superimposed shear wall of the present invention includes three parts: the production process A of the prefabricated part of the superimposed shear wall, the operation process B of the single-layer superimposed shear wall assembly process, and the assembly process C of the upper and lower two-layer superimposed shear walls. part.

Follow the steps below to manufacture the new prefabricated composite shear wall with steel plate support:

Step A1, processing the reinforced mesh of the A-side concrete slab: according to the requirements of the design drawing, tie or weld the reinforcement on the A-sided sheet mold to make the A-sided concrete slab of the reinforced mesh;

Step A2, arranging and welding the pre-embedded sleeves: according to the requirements of the design drawing, the pre-embedded sleeves are arranged one-to-one with all the bolt holes of the steel plate, and are welded and fixed on the reinforced mesh to make the pre-embedded sleeves in the A-side concrete slab. The overall structure is shown in Figure 13.

Step A3, pouring the A-side concrete slab: pour concrete into the mould with the pre-embedded integral structure arranged in step A2, pour it to the design elevation of the A-side concrete slab, fully vibrate the poured A-side concrete slab and move it to the concrete The curing area shall be maintained until the maintenance requirements are met, and the mold shall be demolded after the curing to make the prefabricated A-face concrete slab;

Step A4, making the prefabricated B-side concrete slab: Since the B-side concrete slab and the A-side concrete slab have exactly the same size and structure, the same steps as A1-A3 are taken to make the prefabricated B-side concrete slab;

Step A5, punching the dark support steel plate: as shown in Figure 4, according to the requirements of the design drawing, open screw holes on the dark support steel plate at the positions corresponding to the embedded sleeves one-to-one, and punch according to the rules along the length of the steel plate as a whole. hole.

Step A6, making an X-shaped dark support steel plate: as shown in Figure 5, the punched steel plate prepared in step A5 is assembled and welded to form an X-shaped prefabricated dark support steel plate;

Step A7, making the prefabricated upper and lower wall connecting steel plates: as shown in Figure 6, according to the requirements of the design drawing, open screw holes on the upper and lower wall connecting steel plates at the positions corresponding to the pre-embedded sleeves, and the whole is along the length direction of the steel plate. Punch holes according to the rules to make prefabricated upper and lower wall connecting steel plates.

Follow the steps below to assemble the new single-layer laminated shear wall with steel plate support:

Step B1, use the screw to reinforce the concrete slab on the A surface: use a crane to place the prefabricated concrete slab on the surface A made in step A3 vertically, and then pass one side of the screw through the hole where the prefabricated slab is embedded in the sleeve. And use two nuts to reinforce the connection with the A-side concrete slab, the connection method is shown in Figure 8;

Step B2, assemble and reinforce the prefabricated X-shaped dark support steel plate and the prefabricated upper and lower wall connecting steel plates: according to the requirements of the design drawing, pass the other side of the assembled structural screw in step B1 through the screw holes on the prefabricated steel plates made in steps A6 and A7 , the prefabricated steel plate is arranged in the center of the screw, and the nut is used for reinforcement connection. The reinforcement method of the prefabricated steel plate and the screw is shown in Figure 7, and the overall connection method is shown in Figure 9;

Step B3, assemble and reinforce the B-side concrete slab: use a crane to place the prefabricated B-side concrete slab made in step A4 vertically, pass the screw rod in the assembled structure of step B2 through the pre-embedded hole of the prefabricated B-side concrete slab, and use The nuts are reinforced and connected, and the connection method is shown in Figure 3, and a single-layer laminated shear wall with steel plate hidden support is assembled.

Follow the steps below to carry out the assembly process of the lower layer of the new laminated shear wall with steel plate hidden support:

Step C1, pouring concrete into the cavity of the superimposed shear wall: according to the requirements of the design drawing, place the superimposed shear wall assembled in step B3 at the required position and connect it with the ground for reinforcement, and pour concrete in the cavity inside it to The elevation where the concrete slab is located, after the sufficient vibration is completed, the shear wall with the pre-embedded connection steel plate at the top is obtained;

Step C2, assemble the upper and lower wall members: adopt the same operation process as step B2, in the obtained assembly member, pass one side of the screw rod through the screw hole of the connecting steel plate of the upper and lower walls on the shear wall obtained in step C1, and use the same steps as in the step C1. B3 The same operation process is used to assemble the B-side concrete slab of the upper shear wall to obtain a double-layer overall structure as shown in Figure 12.

To sum up, in this superimposed shear wall structure with steel plate hidden support, the A-side concrete slab, the B-side concrete slab and the steel plate are all prefabricated structures, and a steel plate is added between the A-side concrete slab and the B-side concrete slab. Concealed support, after on-site pouring, the steel plate can be embedded in the interior of the shear wall to form a composite structure composed of steel plates, steel bars and concrete, which can give full play to the good bearing capacity and seismic performance of the steel structure. The bearing capacity, structural integrity and seismic performance of the traditional superimposed shear wall are significantly improved, which can effectively reduce the pouring thickness of the concrete slab, save materials, and make the on-site pouring process easier.

In the present invention, the upper and lower shear walls are connected by screw and nut reinforced punched steel plates, and the upper and lower layers are poured into a whole by concrete at the junction. The shear resistance of the weak link will be greatly improved, and the connecting steel plate will also play a role of a hidden support inside the joint of the upper and lower shear walls, further improving the integrity and seismic performance of the superimposed shear wall.

The present invention also provides a building structure in which the laminated shear wall in the embodiment of the present invention is used.

Supplementary description: The above is only a preferred example of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing examples, for those skilled in the art, it is still possible to modify the technical solutions of the foregoing examples, Or equivalently replace some of its technical features. Any modifications, equivalent replacements, improvements, additions, details changes, etc. made within the principles of the present invention are included within the protection scope of the present invention.

Claims (10)

1. The utility model provides a superimposed shear wall, includes A face concrete slab and B face concrete slab, its characterized in that: the concrete slab comprises an A-side concrete slab and a B-side concrete slab, and is characterized by further comprising a connecting part, wherein the A-side concrete slab and the B-side concrete slab are connected through the connecting part, and concrete is poured between the A-side concrete slab and the B-side concrete slab which are connected through the connecting part; the connecting part comprises a hidden supporting plate and a fastening piece, and the fastening piece comprises a screw and a nut; the screw penetrates through the thickness direction of the hidden support plate and extends out of the upper surface and the lower surface of the hidden support plate; at least one pair of nuts are respectively arranged on the screw rods positioned on the upper surface and the lower surface of the hidden support plate; the concrete slab with the A surface is fixed between a pair of nuts positioned on the upper surface of the hidden supporting plate and is fixed through the pair of nuts, and the concrete slab with the B surface is fixed between a pair of nuts positioned on the lower surface of the hidden supporting plate and is fixed through the pair of nuts.

2. The laminated shear wall of claim 1, wherein: and pre-embedded sleeves are arranged in connecting holes between the A-side concrete plate and the B-side concrete plate and the screw rods.

3. The laminated shear wall of claim 2, wherein: and the embedded sleeve is welded with the reinforcing mesh in the A-side concrete plate and the B-side concrete plate.

4. The laminated shear wall of claim 3, wherein: and grooves for embedding the nuts in the fasteners are arranged outside the connecting holes between the A-side concrete plate and the B-side concrete plate and the screw rods.

5. The laminated shear wall of claim 1, wherein: the dark supporting plate is an X-shaped steel plate and is provided with a middle intersection point and four end nodes; the four end nodes are positioned at four corners of the A-side concrete plate or the B-side concrete plate; at least one of the fasteners is disposed at the intermediate intersection point and each of the end nodes.

6. The laminated shear wall of claim 5, wherein: the screw rod is welded with the hidden support plate or fixed by a nut.

7. The laminated shear wall of claim 5, wherein: the X-shaped steel plate is a steel plate with holes.

8. A laminated shear wall of any one of claims 1 to 7, wherein: the connecting component also comprises an upper wall connecting plate and a lower wall connecting plate, wherein the upper wall connecting plate and the lower wall connecting plate are provided with two connecting parts, and the two hidden supporting plates are connected into a whole through a fastening piece positioned on the hidden supporting plates.

9. The superposed shear wall of claim 7, wherein: the upper and lower wall connecting plates are made of perforated steel; the connecting part is provided with a mounting hole matched with the screw of the fastener.

10. A building comprising a laminated shear wall according to any one of claims 1 to 9.

Images