CN217079256U - Prefabricated assembled ultra-high performance concrete prefabricated thin plate superposed shear wall - Google Patents

Abstract

The application discloses a prefabricated assembled type ultrahigh-performance concrete prefabricated thin plate superposed shear wall which comprises an upper prefabricated wall body part, a lower prefabricated wall body part and a cast-in-place concrete part; the prefabricated wall body part comprises distributed steel bars, embedded column longitudinal bars, stirrups, a lattice steel bar bracket, a steel bar framework formed by steel plate embedded supports and two prefabricated wall pieces; the prefabricated wall sheet is made of ultra-high performance concrete, and rectangular notches are reserved at four corners of the prefabricated wall sheet; the ultrahigh-performance concrete prefabricated thin plate superposed shear wall is provided with cast-in-place hidden columns; the cast-in-place concrete part is formed by pouring high-damping concrete at the bottom and pouring self-compacting concrete at the upper part; the upper wall body and the lower wall body are connected into a whole by the gap steel bars and the embedded lap steel bars in an indirect lap joint mode. Compare with the prefabricated superimposed shear wall of current reinforced concrete, the utility model discloses a bearing capacity increases substantially, and shear force wall cross sectional dimension reduces, the earthquake action alleviates, has obvious multichannel antidetonation defence line.

Description

Prefabricated ultra-high performance concrete prefabricated sheet composite shear wall

technical field

The utility model belongs to the field of prefabricated building structures, relates to prefabricated building structures, mainly relates to an industrially produced prefabricated superimposed shear wall structure system, in particular to a prefabricated super high-performance concrete prefabricated sheet superimposed shear wall structure system.

Background technique

The prefabricated laminated shear wall structural system consists of several prefabricated rectangular laminated concrete wall panels (prefabricated concrete panels connected by lattice steel bars and components composed of in-situ poured concrete in the cavity), and the upper and lower wall panels are connected by various structural structures or devices. The prefabricated laminated concrete shear wall structure system not only has the advantages of high production efficiency, short construction period, green environmental protection and high production accuracy of the prefabricated shear wall structure, but also has the good integrity of the cast-in-place shear wall. Appearing in non-seismic regions such as Europe, it is mainly used for heat preservation and vertical load bearing. In recent years, it has been introduced into domestic research and application in the field of earthquake resistance.

When the traditional reinforced concrete composite shear wall structure is applied to high-rise and super-high-rise buildings, the cross-sectional size of the components is too large, and the excessively thick shear wall directly leads to the increase of the structure's dead weight, the increase of the seismic action, and the consumption of materials and use of space; The laminated shear wall is a semi-prefabricated structure. The prefabricated wall panels are manufactured from the factory and then transported to the construction site. The lifting conditions have certain restrictions on the size of the prefabricated wall panels. The prefabricated wall panels have to be divided into small sizes, resulting in increased transportation. At the same time, it faces the problem of more vertical joints between wall panels, which will affect the overall seismic performance of the laminated shear wall. In order to reduce the section size of the shear wall, the relevant regulations indicate that high-strength and high-performance concrete should be used. In view of the disadvantage of high-strength concrete being brittle, relevant measures to improve ductility are proposed, such as setting end columns, increasing reinforcement ratio, built-in section steel, steel plate, etc., but For super high-rise structures constructed according to the above measures, the shear wall section size is still relatively large.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the utility model proposes a prefabricated prefabricated super high performance concrete prefabricated thin plate superimposed shear wall structure; the superimposed shear wall is composed of a prefabricated thin plate shell with a cavity in the middle, which is assembled on site It is composed of cast-in-place concrete; the prefabricated sheet shell of this superimposed shear wall is made of ultra-high-performance concrete, which can effectively reduce the cross-sectional size of the shear wall, reduce its own weight, and improve the lateral bearing capacity of the shear wall; The combined shear wall is equipped with cast-in-place hidden columns and built-in steel plate hidden supports, so that the shear wall has multiple anti-seismic defense lines; the prefabricated laminated wall panels of this kind of shear wall form a constraining shell through lattice steel bars, and the intermediate cavity is reinforced with cast-in-place concrete. The integrity of the shear wall and the reliable vertical connection of the upper and lower prefabricated walls make the composite shear wall form a whole and further improve the seismic performance.

The utility model realizes through the following technical solutions:

A prefabricated super-high-performance concrete prefabricated thin-slab superimposed shear wall, comprising setting an ultra-high-performance concrete prefabricated thin-slab shell, cast-in-place high-damping concrete, and cast-in-place self-compacting concrete;

The high-performance concrete prefabricated sheet shell is composed of two ultra-high-performance concrete prefabricated wall pieces, the wall pieces are connected by lattice steel bars to form a whole, and the four corners of the wall pieces are left with rectangular gaps;

The lattice reinforcement support is composed of vertical reinforcement bars and oblique reinforcement bars, which are connected by welding and are in the shape of a quadrangular pyramid;

The ultra-high-performance concrete prefabricated thin-plate superimposed shear wall has a built-in steel plate dark support, and the steel plate dark support is formed by welding two steel plates with a rectangular section in an X-shape, and the surface of the steel plate is welded with shear-resistant steel bars;

The vertical connection between the ultra-high performance concrete prefabricated thin-plate superimposed shear wall and the lower wall pieces is connected by indirect lap joints and pre-embedded lap joint reinforcement bars distributed at the gap, and the pre-embedded lap joint reinforcement bars are connected by the lower layer wall body. The top surface extends into the cavity of the upper wall.

The prefabricated ultra-high performance concrete composite wall is filled with high damping concrete in the lower end gap and the bottom sizing layer area.

The prefabricated super high-performance concrete superimposed wall is filled with self-compacting concrete above the filled high-damping concrete and in the middle cavity of the superimposed wall.

Compared with the existing reinforced concrete prefabricated composite shear wall, the prefabricated wall panels of the prefabricated composite plate shear wall of the present invention are made of ultra-high-performance concrete materials, and its ultra-high mechanical properties have an impact on the seismic performance of the composite shear wall. It is very advantageous, the precast layer acts as a constraint on the concrete of the middle layer, and the improvement of both will greatly improve the bearing capacity of the shear wall, which is conducive to reducing the cross-sectional size of the components, and the cast-in-place concealed column and the built-in steel plate concealed support have multiple channels. The anti-seismic defense line can make the structure reach the ideal failure mode under the action of large earthquake.

Description of drawings

Figure 1 is a schematic diagram of the front elevation of the prefabricated prefabricated ultra-high performance concrete prefabricated thin-plate superimposed shear wall of the present invention.

Fig. 2 is a schematic cross-sectional view of a prefabricated prefabricated ultra-high performance concrete prefabricated thin-plate superimposed shear wall of the present invention.

Figure 3 is a schematic diagram of the pre-embedded lap joint steel bar in the lower wall of the present invention.

FIG. 4 is a schematic diagram of the completion of the hoisting of the upper wall of the present invention.

FIG. 5 is a schematic diagram of the completion of pouring of the upper wall of the present invention.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments:

A prefabricated prefabricated super high performance concrete prefabricated sheet laminated shear wall, comprising distribution steel bars 1, concealed column longitudinal bars and stirrups 2, lattice reinforcement supports 3, super high performance concrete prefabricated sheet shells 4, steel plate dark supports 5 , Lap steel 6, high damping concrete 7, self-compacting concrete 8.

Step 1: Prefabricate the ultra-high performance concrete prefabricated sheet shell 4 in the factory, first make the steel skeleton, tie the distribution steel 1, the longitudinal reinforcement of the hidden column and the stirrup 2, and then place the steel plate support 5 to form the steel reinforcement with the lattice steel support 3 For the skeleton, ultra-high-performance concrete wall pieces are respectively poured on the front and back sides of the steel skeleton to form an ultra-high-performance concrete prefabricated sheet shell 4 with a cavity.

The second step: transport the ultra-high-performance concrete prefabricated sheet shell 4 to the construction site and hoist it in place, insert the pre-buried lap reinforcement 6 at the top of the lower shear wall into the cavity of the upper wall, and the prefabricated between the upper and lower walls. Leave a 50mm sizing layer for positioning and fixing.

Step 3: Support the formwork on the sides of the ultra-high performance concrete prefabricated sheet shell 4, the corner gap and the reserved sizing layer at the bottom, and pour the high damping concrete until the height reaches the height of the corner gap.

Step 4: Finally, pour self-compacting concrete 7 on top of the poured high damping concrete and into the cavity in the middle of the wall. After the curing of the concrete is completed, the production of the prefabricated ultra-high performance concrete prefabricated thin-plate laminated shear wall is completed.

Claims (7)

1. A prefabricated assembled ultra-high performance concrete prefabricated thin plate superposed shear wall comprises an upper ultra-high performance concrete prefabricated thin plate shell, a lower ultra-high performance concrete prefabricated thin plate shell and cast-in-place concrete; the ultra-high performance concrete prefabricated thin plate shell is characterized by comprising a prefabricated wall sheet, corner rectangular notches, a lattice steel bar bracket, distributed steel bars, embedded column longitudinal bars, embedded steel plate supports and lapped steel bars; the distributed steel bars, the hidden column longitudinal bars and the stirrups are bound to form a steel bar cage, and the steel bar cage is stressed together with the built-in steel plate hidden supports and the concrete; the corner rectangular gap is provided with distributed steel bars; a mortar layer is reserved between the upper and lower ultra-high performance concrete prefabricated thin plate shells; erecting a mould at the gap and the grout layer, and pouring high-damping concrete; and pouring self-compacting concrete in the residual upper cavity.

2. The precast assembled ultra-high performance concrete precast slab superposed shear wall as claimed in claim 1, wherein the ultra-high performance concrete precast slab shell is composed of two precast wall pieces, which are integrally connected by lattice steel bars; the prefabricated wall sheet is made of ultra-high performance concrete; and a cavity is reserved between the two prefabricated wall sheets.

3. The precast assembled ultra-high performance concrete precast slab superposed shear wall of claim 1, wherein the distribution steel bars, the embedded column longitudinal bars, the stirrups and the steel plate embedded supports are arranged in the shell of the ultra-high performance concrete precast slab.

4. The prefabricated ultrahigh-performance concrete precast thin plate superposed shear wall as claimed in claim 1, wherein rectangular notches are left at four corners of the shell of the ultrahigh-performance concrete precast thin plate, and upper and lower layers of vertically distributed steel bars at the rectangular notches are indirectly lapped.

5. The prefabricated ultrahigh-performance concrete precast thin slab superposed shear wall as claimed in claim 1, wherein the upper and lower shear walls are connected by overlapping steel bars, and the overlapping steel bars pre-embedded in the top surface of the lower wall are inserted into the cavity of the upper wall.

6. The precast assembled ultra-high performance concrete precast thin slab superposed shear wall as claimed in claim 1, wherein the high damping concrete is poured at the rectangular gap and the grout blanket between the upper and lower floors.

7. The prefabricated ultrahigh-performance concrete prefabricated thin plate superposed shear wall as claimed in claim 1, wherein the ultrahigh-performance concrete prefabricated thin plate shell is prefabricated in a factory, each component is lifted to a construction site and then supported by a formwork, and self-compacting concrete is poured on the poured high-damping concrete and in the cavity between the prefabricated wall pieces to form the prefabricated ultrahigh-performance concrete prefabricated thin plate superposed shear wall integral body.

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