CN103669649A - Built-in concealed brace self-insulation laminated plate type shear wall - Google Patents

Abstract

The invention discloses a self-insulation laminated slab shear wall with built-in concealed support, which comprises a prefabricated concrete layer, an insulation board, a cast-in-situ concrete layer, transverse reinforcement bars, vertical reinforcement bars, lattice reinforcement bars, stirrup bars, and U-shaped insert bars , foundation beam and diagonal reinforcement (hidden support) are composed of ten parts. Among them, the lattice reinforcement is welded on one side of the vertical reinforcement, and then pressed into another layer of prefabricated concrete, which mainly connects the prefabricated layer, so that the laminated layer and the cast-in-place layer can work together; The beam and the wall are jointly stressed; the insulation board is placed between the laminated layer and the cast-in-place layer to improve the insulation performance of the wall. Diagonal bars (concealed braces) are welded to the steel skeleton composed of horizontal steel bars and vertical steel bars, which can not only enhance the shear performance of the wall under earthquake action, but also make the foundation beam and the wall bear the force synergistically.

Description

Built-in hidden support self-insulation laminated plate shear wall

technical field

The invention relates to a building structure component, in particular to a shear wall in a building with a laminated plate structure, and belongs to the technical field of building structures.

Background technique

At present, most reinforced concrete structures are cast-in-place structures, which have the advantages of good seismic performance, good plasticity, and good integrity. At the same time, it also has some disadvantages, such as high on-site construction intensity, long construction period, low degree of industrial production, large formwork consumption, and obvious seasonal effects, etc. The other corresponding to this is the prefabricated reinforced concrete structure. Some building components can be produced industrially. The manufacturing is less affected by seasonality, the construction period is short, and the use of formwork is less. However, the biggest disadvantage is that the overall performance is poor, which is not conducive to earthquake resistance. In previous earthquakes, it was found that the damage of prefabricated components was relatively serious. Therefore, in earthquake-resistant areas, the use of prefabricated components is restricted. In addition, the prefabricated reinforced concrete structure is not impermeable, so it cannot be used in special structures.

In addition, Chinese Patent No. "200920299378.0" discloses a "one"-shaped laminated slab shear wall. There are anti-seismic columns in between: forming a shear wall spliced with wall panels without openings. This kind of seismic wall is an improvement to the traditional shear wall, but this patent cannot solve the three common earthquake damages of reinforced concrete shear walls: ① oblique cracks appear on the wall surface; ② horizontal construction joints on the bottom floor occur horizontally 3) The coupling beams in the coupled shear walls are sheared prematurely.

Contents of the invention

The present invention proposes a self-insulation laminated slab shear wall with concealed support, fully utilizes the advantages of both the cast-in-place reinforced concrete structure and the prefabricated reinforced concrete structure, and overcomes the long construction period of the cast-in-place concrete structure, large amount of formwork, and It has disadvantages such as high labor intensity, and at the same time, it can solve the problem of poor seismic performance of prefabricated structures.

The technical scheme adopted in the present invention is: a self-insulation laminated slab shear wall with built-in concealed support, including prefabricated concrete layer, insulation board, cast-in-place concrete layer, transverse steel bars, vertical steel bars, lattice steel bars, stirrups, U-shaped bars, foundation beams and diagonal bars (hidden braces);

The prefabricated concrete layer, insulation board, and cast-in-place concrete layer are connected together to form a wall, the cast-in-place concrete layer is arranged between two precast concrete layers, and the insulation board is placed between the precast concrete layer and the cast-in-place concrete layer , improve the thermal insulation performance of the wall, the horizontal steel bar, vertical steel bar and lattice steel bar are arranged in the wall, the lattice steel bar and the vertical steel bar are welded, and the lattice steel bar is mainly used to connect the prefabricated layer, so that the laminated layer and the existing Layers work together;

Transverse steel bars and stirrups are arranged in the foundation beam;

The wall is arranged on the foundation beam, and the U-shaped inserting bar is located at the bottom of the foundation beam and extends into the wall, so that the foundation beam and the wall are jointly stressed; the diagonal bars are welded on the horizontal reinforcement and the vertical reinforcement The steel skeleton formed can not only enhance the shear performance of the wall under the earthquake, but also make the foundation beam and the wall bear the force synergistically.

Preferably, the transverse reinforcement, vertical reinforcement, lattice reinforcement, stirrup, U-shaped insert, and oblique reinforcement are processed from ordinary hot-rolled reinforcement.

Preferably, the insulation board 2 is a recycled polystyrene foam (REPS) concrete insulation board, or it can be a commonly used engineering insulation board, such as an EPS insulation board.

As a preference, the prefabricated concrete layer 1 may be 40-60mm thick fine concrete.

The cast-in-place concrete layer 3 and foundation beam 9 may be common commercial concrete.

Beneficial effects: 1. The invention has made innovations in the structural system, which belongs to the self-insulation of the wall, which is beneficial to improve the thermal insulation performance of the wall, and the thermal insulation material recycled polystyrene foam (REPS) concrete insulation board turns waste into treasure, which is in line with the green construction and environmental requirements. The foamed concrete insulation board can ensure the fire safety and service life of the building while realizing more than 65% energy saving of the building. The replacement of organic insulation materials (such as EPS boards) by foam concrete insulation boards has become the general trend in building energy conservation, and the market is gradually expanding. Foam concrete is mainly made of cement, which is a safe non-combustible material. The fire resistance class is greater than 2h, which can reach the A-class fire protection standard, and can fully meet the fire protection requirements of any building. The design life of the building is generally 50-100 years. The durability of foam concrete is more than 50 years, which can last the same life as the building.

2. The present invention proposes a built-in self-insulation laminated slab shear wall with hidden support, fully utilizes the advantages of both the cast-in-place reinforced concrete structure and the prefabricated reinforced concrete structure, and overcomes the long construction period of the cast-in-place concrete structure, large amount of formwork, and labor At the same time, it can solve the problem of poor seismic performance of prefabricated structures. And compared with Chinese Patent No. "200920299378.0", this composite slab shear wall with darkened support can effectively improve the bearing capacity and ductility of the shear wall, limit the development of oblique cracks in the shear wall, and delay the plasticity of the bottom of the shear wall. With the emergence of hinges, the overall resistance of the structure lasts, the stiffness and bearing capacity decay slowly, the performance of the structure is stable in the later stage, and the overall anti-expansion capacity is enhanced.

Description of drawings

Fig. 1 is the structure schematic diagram of self-insulation laminated slab type shear wall with built-in concealed support of the present invention;

Fig. 2 is a-a sectional view among Fig. 1;

Fig. 3 is b-b sectional view among Fig. 1;

Fig. 4 is a schematic diagram of the lattice steel bar of the present invention.

Detailed ways

Below in conjunction with specific embodiment and accompanying drawing, the present invention will be further described:

As shown in Figure 1-4, a self-insulation laminated slab shear wall with hidden support includes prefabricated concrete layer 1, insulation board 2, cast-in-place concrete layer 3, horizontal reinforcement 4, vertical reinforcement 5, lattice structure Steel bar 6, stirrup bar 7, U-shaped insert bar 8, foundation beam 9 and diagonal bar (hidden support) 10;

The precast concrete layer 1, insulation board 2, and cast-in-place concrete layer 3 are connected together to form a wall, the cast-in-place concrete layer 3 is arranged between two precast concrete layers 1, and the insulation board 2 is placed in the precast concrete layer 1 and between the cast-in-place concrete layer 3 to improve the thermal insulation performance of the wall, the horizontal steel bar 4, the vertical steel bar 5 and the lattice steel bar 6 are arranged in the wall, and the lattice steel bar 6 is welded to the vertical steel bar 5, and the lattice structure Steel bar 6 is mainly used to connect the prefabricated layers, so that the laminated layer and the cast-in-place layer can work together;

The foundation beam 9 is provided with a transverse steel bar 4 and a stirrup 7;

The wall is arranged on the foundation beam 9, the U-shaped rib 8 is located at the bottom of the foundation beam 9, and extends into the wall, so that the foundation beam 9 and the wall are jointly stressed; the oblique reinforcement 10 is welded in the transverse direction The reinforcement skeleton composed of the reinforcement bars 4 and the vertical reinforcement bars 5 can not only enhance the shear performance of the wall under earthquake action, but also enable the foundation beam 9 and the wall to jointly bear force.

The transverse reinforcement bars 4, vertical reinforcement bars 5, lattice reinforcement bars 6, stirrup bars 7, U-shaped insert bars 8, and oblique bars 10 are processed from ordinary hot-rolled steel bars. The insulation board 2 is a concrete insulation board made of recycled polystyrene foam (REPS), or it can be a commonly used insulation board in engineering, such as an EPS insulation board. The prefabricated concrete layer 1 can be 40-60mm thick fine concrete.

The concrete construction method of shear wall of the present invention is as follows:

(1) Weld the three-dimensional steel skeleton composed of horizontal steel bars 4, vertical steel bars 5, lattice steel bars 6, and diagonal bars (hidden braces) 10;

(2) Prefabricated concrete layer 1, press into the steel skeleton before the concrete hardens, maintain for 7 days, turn it over with a machine, prefabricate the concrete layer on the other side, and press in before the concrete hardens; form a cavity wall

(3) Bind the reinforcement cage of the foundation beam 9, set up the formwork of the foundation beam 9, put the cavity wall formed in step (2) on it, and support it with supports on both sides;

(4) Put the recycled polystyrene foam (REPS) concrete insulation board in the position shown in Figure 3, and pour concrete;

(5) Carry out concrete curing, and remove the formwork when the concrete strength meets the requirements.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (4)

1. A built-in concealed support self-insulation laminated slab shear wall is characterized in that: it includes a prefabricated concrete layer, insulation board, cast-in-place concrete layer, transverse reinforcement, vertical reinforcement, lattice reinforcement, stirrups, U-shaped Inserted bars, foundation beams and inclined bars; The prefabricated concrete layer, insulation board, and cast-in-place concrete layer are connected together to form a wall, the cast-in-place concrete layer is arranged between two precast concrete layers, and the insulation board is placed between the precast concrete layer and the cast-in-place concrete layer , the horizontal reinforcement, the vertical reinforcement and the lattice reinforcement are arranged in the wall, and the lattice reinforcement is welded to the vertical reinforcement; Transverse steel bars and stirrups are arranged in the foundation beam; The wall is arranged on the foundation beam, the U-shaped inserting bar is located at the bottom of the foundation beam and extends into the wall, and the oblique bar is welded on the reinforcement skeleton composed of the transverse reinforcement and the vertical reinforcement. 2. The built-in concealed support self-insulation laminated slab shear wall according to claim 1, characterized in that: said transverse reinforcement, vertical reinforcement, lattice reinforcement, stirrup, U-shaped inserting reinforcement, and oblique reinforcement are Processed from hot-rolled steel bars. 3. The built-in concealed support self-insulation laminated slab shear wall according to claim 1, characterized in that: said insulation board is concrete insulation board or EPS insulation board made of recycled polystyrene foam. 4. The built-in concealed support self-insulation laminated slab shear wall according to claim 1, characterized in that: the prefabricated concrete layer 1 is fine concrete with a thickness of 40-60mm.

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