Prefabricated reinforced concrete shear wall and construction method

Abstract

The present invention discloses a prefabricated reinforced concrete shear wall and a construction method, comprising a concrete wall, an edge member is provided on one side of the concrete wall, a horizontal protruding longitudinal reinforcement is provided on the other side of the concrete wall, and vertical protruding longitudinal reinforcement is provided on both sides of the concrete wall; and steel beam connectors are provided at both ends of the edge member. The construction method is: hoisting the prefabricated reinforced concrete shear wall of the same layer to a designated position; tying stirrups and longitudinal reinforcements in the horizontal connection area to obtain a lower layer shear wall frame; hoisting two prefabricated reinforced concrete shear walls of the upper layer; the fourth step, setting hidden beam steel bars and hidden beam longitudinal reinforcements in the vertical connection area; connecting and fixing the upper and lower adjacent steel beam connectors; and setting longitudinal reinforcement connectors between the hidden column longitudinal reinforcements, inserting stirrups in the stirrup holes; setting up a concrete pouring template, pouring and molding concrete, and obtaining the wall of this layer. The present invention has low cost, convenient connection and good fireproof performance.

Description

Technical Field

[0001] The invention relates to a shear wall, in particular to a prefabricated reinforced concrete shear wall and a construction method. Background Art

[0002] Shear walls are also called earthquake-resistant walls or structural walls; they are walls in houses or structures that mainly bear horizontal and vertical loads caused by wind loads or earthquakes. Existing traditional shear walls are mainly reinforced concrete structures, which are generally made by cast-in-place concrete. They require tying steel skeletons and pouring concrete on site, which not only slows down the construction speed, but also makes it difficult to ensure the pouring quality. Secondly, the deadweight of concrete beams is relatively heavy, which affects the cost of vertical components and foundations, and the seismic performance of the structure is not high. Under the same span and load conditions, the beam height of concrete beams is relatively high, which reduces the net height of the building and affects the use of the building. In addition, the opening structure of concrete beams is complex. With the development of green buildings and building industrialization, prefabricated buildings have gradually entered the market, and prefabricated shear walls have begun to gradually replace traditional cast-in-place concrete shear walls. The existing prefabricated shear wall structure system is mainly a steel plate composite shear wall, which is easy to connect, fast to construct, and has guaranteed construction quality; however, the steel plate composite shear wall has poor fire resistance and requires additional fire protection, which is costly. Fireproof materials also occupy the usable area of ​​the building, resulting in low efficiency in the use of the building. Fireproof materials are easily destroyed in the later decoration project, affecting the fire safety of the structure; at the same time, the amount of steel used is high and the cost is high. Therefore, the existing technology has the problem of not being able to take into account low cost, convenient connection and good fire resistance at the same time. Summary of the invention

[0003] The object of the present invention is to provide a prefabricated reinforced concrete shear wall and a construction method thereof, which has the advantages of low construction cost, convenient connection and good fireproof performance.

[0004] The technical solution of the present invention is a prefabricated reinforced concrete shear wall, comprising a concrete wall body, wherein the upper and lower ends of the concrete wall body are provided with vertical protruding longitudinal reinforcements, the side of the concrete wall body is provided with edge components, and the upper and lower ends of the edge components are provided with steel beam connectors.

[0005] In the aforementioned prefabricated reinforced concrete shear wall, an edge member is provided on one side of the concrete wall, and horizontal protruding longitudinal reinforcement is provided on the other side of the concrete wall.

[0006] In the aforementioned prefabricated reinforced concrete shear wall, edge components are provided on both sides of the concrete wall.

[0007] In the aforementioned prefabricated reinforced concrete shear wall, the edge member is a straight-line, L-shaped, T-shaped or end column structure.

[0008] In the aforementioned prefabricated reinforced concrete shear wall, horizontal longitudinal bars corresponding to the horizontal protruding longitudinal bars and vertical longitudinal bars corresponding to the vertical protruding longitudinal bars are arranged in the concrete wall body, and tension bars are also arranged on the vertical longitudinal bars.

[0009] In the aforementioned prefabricated reinforced concrete shear wall, the edge component includes a concrete hidden column, a hidden column steel bar skeleton is arranged in the concrete hidden column, and horizontal longitudinal bars are anchored into the concrete hidden column; the hidden column steel bar skeleton includes interconnected hidden column longitudinal bars, hidden column stirrups and hidden column tension bars; the upper and lower ends of the hidden column longitudinal bars respectively pass through the upper and lower surfaces of the concrete hidden column.

[0010] In the aforementioned prefabricated reinforced concrete shear wall, the steel beam connector includes a flange plate, on which a group of vertically arranged webs are provided; longitudinal reinforcement holes are provided on the surface of the flange plate; and stirrup through holes and concrete pouring holes are provided on the web.

[0011] In the aforementioned prefabricated reinforced concrete shear wall, the flange plate is also provided with studs or shear keys.

[0012] A construction method for prefabricated reinforced concrete shear walls, before pouring concrete of the lower floor slab, the prefabricated reinforced concrete shear walls required for the wall of the current layer are hoisted in place, and the connection between the lower floor slab and the wall of the current layer is completed through a hidden beam between the lower floor slab and the wall of the current layer;

[0013] The construction and pouring of the prefabricated reinforced concrete shear wall of this layer includes the following specific steps:

[0014] The first step is to form a horizontal connection area between the two prefabricated reinforced concrete shear walls of this layer, tie the stirrups and longitudinal reinforcement in the horizontal connection area, and set support members on the corresponding prefabricated reinforced concrete shear walls;

[0015] The second step is to hoist the two prefabricated reinforced concrete shear walls of the upper layer to the corresponding positions above the prefabricated reinforced concrete shear walls of the current layer, so that a vertical connection area is formed between the prefabricated reinforced concrete shear walls of the upper layer and the prefabricated reinforced concrete shear walls of the current layer, and an edge member connection area is provided between the upper and lower adjacent steel beam connectors;

[0016] Step 3: Connect the upper and lower adjacent steel beam connectors; and use steel bar connectors to connect the upper and lower adjacent concealed column longitudinal bars in the edge member connection area, and insert stirrups in the stirrup holes;

[0017] Step 4: Set the hidden beam stirrups and hidden beam longitudinal reinforcement in the vertical connection area;

[0018] Step 5: Connect the steel beam connector to the steel beam by full bolt connection, bolt welding connection or full welding connection;

[0019] Step 6: Set up the formwork for pouring concrete in the horizontal connection area, vertical connection area and edge component connection area;

[0020] Step 7: Lay the composite slab or floor deck on the steel beam, tie the floor slab reinforcement, pour the concrete of the floor slab and the back pouring area of ​​the shear wall, and obtain the wall of this layer after curing and forming;

[0021] Repeat the first to seventh steps until the concrete construction of the roof slab is completed;

[0022] The precast reinforced concrete shear wall adopts the aforementioned precast reinforced concrete shear wall.

[0023] Compared with the prior art, the present invention is composed of a concrete wall, an edge member and a steel beam connector, and combines an assembled reinforced concrete shear wall and a steel beam to replace the traditional shear wall structure. It has a high assembly rate and prefabrication rate, and meets the requirements of building industrialization and green buildings. At the same time, it has both good fire resistance and low cost, and also has the advantage of convenient connection. Specifically, the present invention is convenient for assembly construction by arranging steel beam connectors at the ends of edge members, and the connection is convenient and fast to ensure the construction quality. At the same time, a large amount of steel is not required in the shear wall, so that the construction cost can be effectively reduced. Moreover, since the web of the steel beam is convenient to open, it is convenient for pipelines to pass through the beam, so that the use effect of the building is good. In summary, the present invention can have low cost, convenient connection and good fire resistance at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is an interior view of the interior and edge members of the concrete wall;

[0026] Figure 3 It is a structural view of the steel beam connection;

[0027] Figure 4 It is a process flow chart of the construction method of the present invention

[0028] Figure 5 It is the steel bar connection flow chart of the vertical connection area;

[0029] Figure 6 It is the reinforcement connection flow chart of the horizontal connection area;

[0030] Figure 7 It is the assembly view between the upper and lower adjacent steel beam connectors;

[0031] Figure 8 It is a structural view of the edge member of the L-shaped structure;

[0032] Fig. 9 It is a structural view of the edge member of the T-shaped structure.

[0033] The marks in the attached drawings are: 1-concrete wall, 2-edge member, 3-horizontal protruding longitudinal reinforcement, 4-vertical protruding longitudinal reinforcement, 5-steel beam connector, 6-horizontal longitudinal reinforcement, 7-vertical longitudinal reinforcement, 8-tension reinforcement, 201-concrete hidden column, 202-hidden column longitudinal reinforcement, 203-hidden column stirrups, 204-hidden column tension reinforcement, 501-flange plate, 502-web plate, 503-longitudinal reinforcement hole, 504-stirrup through-hole, 505-concrete pouring hole. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0035] Embodiment. A prefabricated reinforced concrete shear wall, comprising: Figures 1 to 9 As shown, it includes a concrete wall 1, with vertical protruding longitudinal reinforcement 4 at the upper and lower ends of the concrete wall 1, an edge member 2 at the side of the concrete wall 1, and steel beam connectors 5 at the upper and lower ends of the edge member 2.

[0036] An edge member 2 is provided on one side of the concrete wall 1 , and a horizontal protruding longitudinal reinforcement 3 is provided on the other side of the concrete wall 1 .

[0037] Edge components 2 are provided on both sides of the concrete wall 1 .

[0038] The edge member 2 is a straight-line, L-shaped or T-shaped structure.

[0039] The concrete wall 1 is provided with horizontal longitudinal bars 6 corresponding to the horizontal protruding longitudinal bars 3 and vertical longitudinal bars 7 corresponding to the vertical protruding longitudinal bars 4 . The vertical longitudinal bars 7 are also provided with tension bars 8 .

[0040] The edge member 2 includes a concrete hidden column 201, in which a hidden column steel bar skeleton is arranged, and horizontal longitudinal bars 6 are anchored into the concrete hidden column 201; the hidden column steel bar skeleton includes mutually connected hidden column longitudinal bars 202, hidden column stirrups 203 and hidden column tension bars 204; the upper and lower ends of the hidden column longitudinal bars 202 respectively pass through the upper and lower surfaces of the concrete hidden column 201.

[0041] The steel beam connector 5 comprises a flange plate 501 on which a group of vertically arranged webs 502 are provided; longitudinal reinforcement holes 503 are provided on the surface of the flange plate 501; and stirrup through holes 504 and concrete pouring holes 505 are provided on the web 502.

[0042] The flange plate 501 is also provided with studs or shear keys.

[0043] The prefabricated reinforced concrete shear wall also needs to have holes or post-casting areas for the floor slab reinforcement to pass through.

[0044] A construction method for prefabricated reinforced concrete shear walls, before pouring concrete of the lower floor slab, the prefabricated reinforced concrete shear walls required for the wall of the current layer are hoisted in place, and the connection between the lower layer and the current layer shear walls is completed through a hidden beam between the lower floor slab and the current layer wall;

[0045] The construction and pouring of the prefabricated reinforced concrete shear wall of this layer includes the following specific steps:

[0046] The first step is to form a horizontal connection area between the two prefabricated reinforced concrete shear walls of this layer, tie the stirrups and longitudinal reinforcement in the horizontal connection area, and set support members on the corresponding prefabricated reinforced concrete shear walls to obtain the concrete shear wall of this layer;

[0047] The second step is to hoist the two prefabricated reinforced concrete shear walls of the upper layer to the corresponding positions above the prefabricated reinforced concrete shear walls of the current layer, so that a vertical connection area is formed between the prefabricated reinforced concrete shear walls of the upper layer and the prefabricated reinforced concrete shear walls of the current layer, and an edge member connection area is provided between the upper and lower adjacent steel beam connectors;

[0048] Step 3: Connect the upper and lower adjacent steel beam connectors; and use steel bar connectors to connect the upper and lower adjacent concealed column longitudinal bars in the edge member connection area, and insert stirrups in the stirrup holes;

[0049] Step 4: Set the hidden beam stirrups and hidden beam longitudinal reinforcement in the vertical connection area;

[0050] Step 5: Connect the steel beam connector to the steel beam by full bolt connection, bolt welding connection or full welding connection;

[0051] Step 6: Set up the formwork for pouring concrete in the horizontal connection area, vertical connection area and edge component connection area;

[0052] Step 7: Lay the composite slab or floor deck on the steel beam, tie the floor slab reinforcement, pour the concrete of the floor slab and the back pouring area of ​​the shear wall, and obtain the wall of this layer after curing and forming;

[0053] Repeat the first to seventh steps until the concrete construction of the roof slab is completed;

[0054] The precast reinforced concrete shear wall adopts the aforementioned precast reinforced concrete shear wall.

[0055] The connection sequence of the hidden beam steel bars and the hidden beam longitudinal bars in the vertical connection area is as follows: 1. The lower layer of longitudinal bars are in place, forming an inverted U shape; 2. The upper layer of longitudinal bars are in place, forming a U shape; 3. Add the stirrups of the hidden beam; 4. Use the concrete pouring holes opened on the web of the steel beam connector to insert the hidden beam longitudinal bars

[0056] The order of connecting the steel bars in the horizontal connection area is as follows: 1. The horizontal longitudinal bars on one side are in place, forming a U shape; 2. The horizontal longitudinal bars on the other side are in place, forming a U shape in the opposite direction; 3. Add stirrups; 4. Insert the longitudinal bars in the horizontal connection area from the top to complete the steel bar connection

[0057] The connection sequence of the upper and lower steel beams in the edge member area is as follows: 1. The lower steel beam connector is in place; 2. The upper steel beam connector is in place, and the upper and lower steel beam connectors are connected by bolts or welding. After reaching the required strength, they bear the self-weight and temporary load of the upper shear wall together with the support in the middle of the wall; 3. The longitudinal steel bars in the edge member area are connected, and steel bar connectors are generally used for equal strength connection. Overlap, welding or mechanical connection can also be used; 4. Stirrups in the edge member connection area are arranged through the stirrup holes of the steel beam connector.

[0058] When pouring the core area of ​​the node, directly using steel plate components that do not require formwork removal can enhance the connection effect of the steel bars and reduce the requirements for strong connections such as steel bars.

[0059] In order to enhance the bonding performance between the flange plate and the column concrete and improve the shear bearing capacity, shear keys or studs may be provided on the upper and lower sides of the flange plate.

Claims

1. A prefabricated reinforced concrete shear wall, characterized in that: The invention comprises a concrete wall (1), wherein the upper and lower ends of the concrete wall (1) are provided with vertically protruding longitudinal reinforcements (4), the side of the concrete wall (1) is provided with an edge member (2), and the upper and lower ends of the edge member (2) are provided with steel beam connectors (5); the edge member (2) is provided on one side of the concrete wall (1), and the horizontally protruding longitudinal reinforcements (3) are provided on the other side of the concrete wall (1); the steel beam connector (5) comprises a flange plate (501), and a group of vertically arranged web plates (502) are provided on the flange plate (501); longitudinal reinforcement holes (503) are provided on the surface of the flange plate (501); and stirrup through holes (504) and concrete pouring holes (505) are provided on the web plate (502).

2. The prefabricated reinforced concrete shear wall according to claim 1, characterized in that: Edge components (2) are provided on both sides of the concrete wall (1).

3. The prefabricated reinforced concrete shear wall according to claim 1, characterized in that: The edge member (2) is a straight-line, L-shaped, T-shaped or end column structure.

4. The prefabricated reinforced concrete shear wall according to claim 1, characterized in that: The concrete wall (1) is provided with horizontal longitudinal bars (6) corresponding to the horizontal protruding longitudinal bars (3) and vertical longitudinal bars (7) corresponding to the vertical protruding longitudinal bars (4), and tension bars (8) are also provided on the vertical longitudinal bars (7).

5. The prefabricated reinforced concrete shear wall according to claim 4, characterized in that: The edge member (2) comprises a concrete hidden column (201), a hidden column steel bar skeleton is provided in the concrete hidden column (201), and horizontal longitudinal bars (6) are anchored into the concrete hidden column (201); the hidden column steel bar skeleton comprises mutually connected hidden column longitudinal bars (202), hidden column stirrups (203), and hidden column tension bars (204); upper and lower ends of the hidden column longitudinal bars (202) respectively pass through the upper and lower surfaces of the concrete hidden column (201).

6. The prefabricated reinforced concrete shear wall according to claim 1, characterized in that: The flange plate (501) is also provided with bolts or shear keys.

7. A construction method using the prefabricated reinforced concrete shear wall according to claim 5, characterized in that: Before pouring concrete for the lower floor slab, the prefabricated reinforced concrete shear wall required for the wall of this floor is hoisted in place, and the connection between the lower floor slab and the wall of this floor is completed through the hidden beam between the lower floor slab and the wall of this floor; The construction and pouring of the wall of this layer includes the following specific steps: The first step is to form a horizontal connection area between the two prefabricated reinforced concrete shear walls of this layer, tie the stirrups and longitudinal reinforcement in the horizontal connection area, and set support members on the corresponding prefabricated reinforced concrete shear walls; The second step is to hoist the two prefabricated reinforced concrete shear walls of the upper layer to the corresponding positions above the prefabricated reinforced concrete shear walls of the current layer, so that a vertical connection area is formed between the prefabricated reinforced concrete shear walls of the upper layer and the prefabricated reinforced concrete shear walls of the current layer, and an edge member connection area is provided between the upper and lower adjacent steel beam connectors; Step 3: Connect the upper and lower adjacent steel beam connectors; and use steel bar connectors to connect the upper and lower adjacent concealed column longitudinal bars in the edge member connection area, and insert stirrups in the stirrup holes; Step 4: Set the hidden beam stirrups and hidden beam longitudinal reinforcement in the vertical connection area; Step 5: Connect the steel beam connector to the steel beam by full bolt connection, bolt welding connection or full welding connection; Step 6: Set up the formwork for pouring concrete in the horizontal connection area, vertical connection area and edge component connection area; Step 7: Lay the composite slab or floor deck on the steel beam, tie the floor slab reinforcement, pour the concrete of the floor slab and the back pouring area of ​​the shear wall, and obtain the wall of this layer after curing and forming; Repeat steps 1 to 7 until the concrete construction of the roof slab is completed.

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