CN116695905A - A modular assembled steel plate outsourcing concrete composite shear wall and its construction method - Google Patents

Abstract

The invention belongs to the technical field of composite shear walls, and relates to a modular assembled steel plate outsourcing concrete composite shear wall and a construction method, wherein the modular assembled steel plate outsourcing concrete composite shear wall structurally comprises an embedded steel plate, one side or one opposite side of the embedded steel plate is provided with a concrete composite member, the concrete composite member comprises a stiffening frame which is fixedly connected with the embedded steel plate, the embedded steel plate is divided into a core area positioned in the stiffening frame and a connecting area positioned outside the stiffening frame, and the connecting area is provided with a connecting structure; the pegs are arranged on the core area of the embedded steel plate at intervals, and one ends of the pegs are fixedly connected with the embedded steel plate; the reinforcing mesh is positioned in the stiffening frame, and the end part of the reinforcing bar positioned at the outermost side of the reinforcing mesh is fixedly connected with the stiffening frame; the concrete slab is positioned in the stiffening frame, the reinforcing mesh and the bolts extend into the concrete slab, and the concrete slab is fixedly connected with the embedded steel plate and is in close contact with the stiffening frame. The shear wall has excellent earthquake resistance, modular prefabrication ensures the quality of components, and reduces the construction difficulty.

Description

A modular assembled steel plate outsourcing concrete composite shear wall and its construction method

technical field

The invention belongs to the technical field of combined shear walls, and in particular relates to a modular assembly type steel plate-wrapped concrete combined shear wall and a construction method.

Background technique

In the high-rise or super high-rise structural system, the shear wall structure is a commonly used form. Under the earthquake, the shear wall not only bears most of the seismic shear force, but also bears part of the vertical load, and is the key component of the seismic design of the structural system. The steel frame inner-fill shear wall structure is different from the traditional shear wall structure. Under earthquake action or wind load, the inner-fill shear wall bears most of the horizontal shear force, while the vertical load is borne by the side frame, which effectively reduces the vertical load. Influence on the overall stability of the shear wall; when the lateral displacement of the structure is large, the infill shear wall first enters the plasticity and dissipates energy, while the steel frame basically maintains elasticity, becoming the second line of defense for the structure against lateral force. Steel plate shear walls, reinforced concrete shear walls and composite shear walls are often used for internal filling shear walls. Among them, the steel plate outsourcing concrete composite shear walls better combine the advantages of steel plate and reinforced concrete shear walls, and are more efficient. Anti-lateral force member. Compared with the reinforced concrete shear wall, when the bearing capacity is the same, the steel plate outer concrete slab composite shear wall has a smaller self-weight and higher ductility; compared with the steel plate shear wall, the steel plate outer concrete slab composite shear wall embedded steel plate Mechanics play more fully.

In the composite shear wall with steel plate and concrete, the main function of the outer concrete slab is to restrain the buckling of the embedded steel plate, so that the embedded steel plate can maintain plane shear, so as to give full play to the shear resistance and energy dissipation capacity of the embedded steel plate. The outsourcing concrete slab can also provide a certain shear stiffness. Even if the performance of the concrete slab deteriorates under strong earthquakes, the embedded steel plate can continue to resist lateral loads. In addition, the concrete slab also plays the role of sound insulation and fire prevention.

However, the traditional composite shear wall with steel plate outsourcing concrete needs to pour concrete on site, which is difficult to construct and the quality of concrete pouring cannot be guaranteed. On the one hand, concrete is prone to larger initial defects, which will affect the normal use of buildings.

Contents of the invention

In view of this, the present invention provides a modular assembled steel plate outsourcing concrete composite shear wall and its construction method, which reduces the difficulty of construction, ensures the quality of concrete pouring, improves the mechanical properties of concrete and the shear bearing capacity of wall panels, It avoids the initial defects on the concrete affecting the normal use of the building. The present invention is a modular prefabricated wall body, modules and frames, and modules are connected by connectors, and are easy to install and easy to replace.

Technical scheme of the present invention is:

A modular prefabricated steel plate-covered concrete composite shear wall, including an embedded steel plate, one side or an opposite side of the embedded steel plate is provided with a concrete composite member, and the concrete composite member includes:

The stiffening frame is fixedly connected with the embedded steel plate, the part located on the embedded steel plate and inside the stiffened frame is the core area of the embedded steel plate, and the part located on the embedded steel plate and outside the stiffened frame Part of it is a connection area embedded with steel plates, and the connection area is provided with a connection structure;

A plurality of pegs are arranged at intervals on the core area of the embedded steel plate, and one end of the peg is fixedly connected to the embedded steel plate;

A steel mesh, located in the stiffening frame, the end of the outermost steel bar on the steel mesh is fixedly connected to the stiffening frame;

The concrete slab is located in the stiffening frame and is in contact with the stiffening frame, the steel mesh and studs both extend into the concrete slab, and the concrete slab is fixedly connected to the embedded steel plate.

Preferably, the stiffening frame includes four ribs, and the four ribs are fixedly connected end to end in order to form a frame structure.

Preferably, the reinforcing mesh includes a plurality of criss-crossing reinforcing bars, and the reinforcing bars are bound and fixed with steel wires.

Preferably, the connecting structure includes a plurality of holes for installing bolts.

Preferably, it further includes four triangular cover plates arranged in the stiffening frame, the four triangular cover plates are respectively located at the four corners of the stiffening frame, and the triangular cover plates are respectively fixedly connected to the stiffening frame and the embedded steel plate.

Preferably, the triangular cover plate is an isosceles right triangle structure.

Preferably, a connecting cover plate is also included, and the connecting cover plate is fixed to the connecting area of the embedded steel plate.

The above-mentioned construction method of a modular assembled steel plate outsourcing concrete composite shear wall comprises the following steps:

Cut the embedded steel plate according to the shape and size of the processing drawing, and open holes in the corresponding position of the connection area of the embedded steel plate as the connection structure;

The four corners of the core area of the embedded steel plate are welded with triangular cover plates, four ribs in the vertical direction are welded around the core area of the embedded steel plate, and the ends of the four ribs are connected to form a stiffening frame. The core area forms a concrete mold;

Multiple studs are welded to the core area of the embedded steel plate;

The reinforcement mesh is laid in the core area of the embedded steel plate, and the end of the outermost reinforcement on the reinforcement mesh is connected to the rib plate;

After pouring concrete in the core area of the embedded steel plate, it can be cured according to the standard.

Preferably, the ends of the outermost steel bars on the steel bar mesh are connected to the ribs by spot welding.

Preferably, the concrete strength grade is not less than C25.

Compared with the prior art, the invention provides a modular assembly type steel plate outsourcing concrete composite shear wall and its construction method, its beneficial effects are:

(1) In the embedded steel plate of the present invention, the ribs are welded around the core area of the embedded steel plate, which increases the rigidity of the four sides of the steel plate, optimizes the stress state of the concrete, and improves the shear bearing capacity of the wall panel; in addition, the ribs and the inner The embedded steel plate forms a mold that can directly pour concrete, which is more convenient and quick;

(2) The difficulty of construction of the present invention is reduced, the quality of concrete pouring is guaranteed, the mechanical properties of concrete and the shear bearing capacity of wall panels are improved, and the initial defects on the concrete are avoided to affect the normal use of the building. Prefabricated walls, modules and frames or modules are connected by bolts, easy to install, if only the modules are damaged after the earthquake, it is easy to replace, strong practicability, and worth promoting.

Description of drawings

Fig. 1 is the three-dimensional figure of the modularized shear wall of single-sided covering concrete wall panel of the present invention;

Fig. 2 is the three-dimensional figure of the modular shear wall of double-sided covering concrete wall panel of the present invention;

Fig. 3 is the belt frame plan view of three sides connection modularized shear wall of the present invention;

Fig. 4 is the modular detailed diagram of the three-side connected modular shear wall without concrete of the present invention;

Fig. 5 is the band frame plan view of four sides connection modular shear wall of the present invention;

Fig. 6 is the modular detailed diagram of the four-side connected modular shear wall without concrete of the present invention;

Fig. 7 is a side view of the joint between the modular shear wall module and the frame of the present invention.

Reference signs:

1. Embedded steel plate; 2. Studs; 3. High-strength bolts; 4. Connecting cover plate; 5. Frame connecting plate; 6. Triangular cover plate; 7. Rib plate; 8. Upper edge frame beam; Frame beam; 10, left edge frame column; 11, right edge frame column; 12, concrete slab; 13, steel mesh.

Detailed ways

The present invention provides a modular assembly type steel plate outsourcing concrete composite shear wall and its construction method. The present invention will be described below with reference to the structural schematic diagrams of Fig. 1 to Fig. 7 .

Example 1

As shown in Figure 1, the present invention provides a modular assembly steel plate outsourcing concrete composite shear wall, the structure of the main body includes an embedded steel plate 1 and a concrete composite member located on one side of the embedded steel plate 1, the concrete composite member includes steel bars Mesh 13, concrete slab 12, stiffening frame and studs 2.

Wherein, the stiffening frame includes four ribs 7, and the four ribs 7 are fixedly connected head to tail to form a frame structure. The reinforcement mesh 13 includes a plurality of criss-cross reinforcement bars, and the reinforcement bars are bound and fixed with steel wires.

Among them, the stiffening frame is set on one side of the embedded steel plate 1 and fixedly connected with the embedded steel plate 1, and the part located on the embedded steel plate 1 and inside the stiffening frame is defined as the core area where the embedded steel plate 1 mainly bears. The part above and outside the stiffening frame is defined as the connection area where the embedded steel plate 1 mainly plays a connection role.

A plurality of pegs 2 are arranged at intervals on the core area mainly loaded by the embedded steel plate 1 , and one end of the pegs 2 is fixedly connected to the embedded steel plate 1 .

One side of the embedded steel plate 1 is also provided with a reinforcement mesh 13, the reinforcement mesh 13 is located in the stiffening frame, and the end of the outermost reinforcement on the reinforcement mesh 13 is fixedly connected with the stiffening frame.

A concrete slab 12 is arranged inside the stiffening frame, the edge of the concrete slab 12 is in close contact with the stiffening frame, the steel mesh 13 and the studs 2 both extend into the concrete slab 12 , and the concrete slab 12 is fixedly connected to the embedded steel plate 1 .

The connection area of the embedded steel plate 1 can be designed according to actual construction needs, and a connection structure is provided on the connection area, and the connection structure includes a plurality of holes for installing bolts.

During the process of resisting the lateral load, the concrete slab 12 can restrain the buckling of the embedded steel plate 1, so that the embedded steel plate 1 maintains plane shearing, so as to give full play to the shear resistance and energy dissipation capacity of the embedded steel plate 1. The stiffening frame composed of four ribs 7 can on the one hand play the role of a mold in the prefabrication process to facilitate pouring of the concrete slab 12; force.

Example 2

As a further improvement scheme based on Example 1, in order to improve the stress concentration at the corner of the embedded steel plate 1 and improve the integrity of the stiffening frame, four triangular cover plates 6 and four triangular cover plates 6 are also arranged in the stiffening frame. They are respectively located at the four corners of the stiffening frame, and the triangular cover plates 6 are fixedly connected with the stiffening frame and the embedded steel plate 1 respectively.

Specifically, the triangular cover plate 6 is an isosceles right triangle structure.

Example 3

As a further improvement scheme based on Example 2, in order to strengthen the strength of the connection area and improve the reliability of the connection, as shown in Figure 4, a connection cover 4 is provided in the connection area of the embedded steel plate 1, and the connection cover 4 and The connection area of the embedded steel plate 1 can be fixed by welding. Due to the addition of the connecting cover plate 4, the thickness of the connecting area increases and the strength is strengthened.

Example 4

As a further improvement scheme based on Example 3, in order to improve the out-of-plane constraint of the embedded steel plate and avoid the out-of-plane eccentricity when the combined shear wall is stressed, as shown in Figure 2, a relative Concrete composite members with the same structure are installed on the sides to improve the bearing capacity and energy dissipation capacity of the wall panels, and at the same time make the stress points of the composite shear walls basically coincide with the centroid.

As shown in Fig. 3, Fig. 4, Fig. 5 and Fig. 6, it is the actual construction drawing of utilizing the modular assembly type steel plate outsourcing concrete composite shear wall construction of the present invention, and the frame is composed of an upper edge frame beam 8 and a lower edge frame beam 9 1. The left edge frame column 10 and the right edge frame column 11 are composed of a frame connecting plate 5 on the frame edge, and a connecting hole matching the preset hole in the connecting area of the embedded steel plate 1 is arranged on the frame connecting plate 5, and the middle modularized The wall is connected with the preset holes in the connection area of the embedded steel plate 1 and the connection holes on the frame connection plate 5 through high-strength bolts 3, as shown in FIG. 7 .

Specifically, Fig. 3 is a steel frame filled with three sides connected modular assembled steel plate outsourcing concrete composite shear wall, which is composed of two modular units. The monolithic module unit is shown in Figure 4, and its embedded steel plate 1 includes three connection areas, the upper and lower horizontal edge connection areas are respectively connected with the frame connection plates 5 of the upper edge frame beam 8 and the lower edge frame beam 9 of the steel frame with high strength Bolt fixed connection; the vertical side connection area and the vertical side connection area of another modular unit are fixedly connected with high-strength bolts, as shown in Figure 3.

Specifically, Figure 5 shows a steel frame filled with four sides connected modular assembled steel plate outsourcing concrete composite shear wall, which is composed of two modular units. The monolithic module unit is shown in Figure 6, and its embedded steel plate 1 includes four connection areas, the upper and lower horizontal side connection areas are respectively connected with the frame connection plates 5 of the upper edge frame beam 8 and the lower edge frame beam 9 of the steel frame with high strength Bolt fixed connection; the two vertical side connection areas are fixedly connected with the vertical side connection area of another module unit and the frame connection plate 5 of the left edge frame column 10 or the right edge frame column 11 with high-strength bolts, as shown in Figure 5.

The construction method of the above-mentioned modularized assembled steel plate outsourcing concrete composite shear wall is as follows:

Cut the embedded steel plate 1 according to the shape and size of the processing drawing, and open holes at the positions corresponding to the connection area of the embedded steel plate 1;

The four corners of the core area of the embedded steel plate 1 are welded with the triangular cover plate 6, and the vertical ribs 7 are welded around the core area of the embedded steel plate 1 to form a concrete mold with the core area of the embedded steel plate 1;

welding a plurality of studs 2 to the core area of the embedded steel plate 1;

Lay the reinforcement mesh 13 in the core area of the embedded steel plate 1 after binding, and the end of the outermost reinforcement on the reinforcement mesh 13 is connected with the rib plate 7 by spot welding;

Concrete is poured in the core area of the embedded steel plate 1, the concrete strength grade should not be less than C25, and the standard maintenance is completed in the factory.

The invention provides a modular assembly type steel plate outsourcing concrete composite shear wall and its construction method, the construction difficulty is reduced, the quality of concrete pouring is guaranteed, the mechanical properties of the concrete and the shear bearing capacity of the wall panels are improved, The initial defects on the building affect the normal use of the building. The present invention is a modular prefabricated wall body, modules and frames, and modules are connected by connectors, and are easy to install and easy to replace. The length and width of the modular units conform to the building modulus. They are produced and maintained in the factory, and can be flexibly arranged and combined in the structure to form a complete lateral force resistance system. The prefabrication of the modular units ensures the quality of the components and reduces the difficulty of hoisting. The installation is convenient and Energy saving and environmental protection. The effective connection between the modules enables each module to effectively exert the shear strength and energy dissipation capacity of the embedded steel plate; the ribs are welded around, which improves the out-of-plane rigidity of the four sides of the embedded steel plate, and can also be used as a mold for concrete, which can be restrained when stressed The concrete slab makes it bidirectionally compressed, further improving the bearing capacity of the shear wall, and is a lateral force-resistant member with superior seismic performance.

The above disclosures are only preferred specific embodiments of the present invention, however, the embodiments of the present invention are not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a modularization assembled steel sheet outsourcing concrete composite shear wall, includes embedded steel sheet (1), its characterized in that, one side or a relative side of embedded steel sheet (1) are provided with the concrete composite member, the concrete composite member includes:

the stiffening frame is fixedly connected with the embedded steel plate (1), the part which is positioned on the embedded steel plate (1) and positioned in the stiffening frame is a core area borne by the embedded steel plate (1), the part which is positioned on the embedded steel plate (1) and positioned outside the stiffening frame is a connecting area of the embedded steel plate (1), and the connecting area is provided with a connecting structure;

the pegs (2) are arranged on the core area of the embedded steel plate (1) at intervals, and one end of each peg (2) is fixedly connected with the embedded steel plate (1);

the reinforcing steel bar net (13) is positioned in the stiffening frame, and the end part of the reinforcing steel bar positioned at the outermost side on the reinforcing steel bar net (13) is fixedly connected with the stiffening frame;

the concrete slab (12) is positioned in the stiffening frame and is in contact with the stiffening frame, the reinforcing mesh (13) and the bolts (2) are all extended into the concrete slab (12), and the concrete slab (12) is fixedly connected with the embedded steel plate (1).

2. The modular steel plate-encased concrete composite shear wall of claim 1, wherein the stiffening frame comprises four rib plates (7), and the four rib plates (7) are fixedly connected end to end in sequence to form a frame structure.

3. A modular steel plate encased concrete composite shear wall according to claim 2, wherein the steel mesh (13) comprises a plurality of crisscrossed steel bars, the steel bars being secured by wire ties.

4. A modular steel plate encased concrete composite shear wall as claimed in claim 3, wherein the connection structure comprises a plurality of holes for mounting bolts.

5. The modular steel plate-encased concrete composite shear wall according to claim 4, further comprising four triangular cover plates (6) arranged in the stiffening frame, wherein the four triangular cover plates (6) are respectively positioned at four corners of the stiffening frame, and the triangular cover plates (6) are respectively fixedly connected with the stiffening frame and the embedded steel plate (1).

6. A modular steel plate encased concrete composite shear wall according to claim 5, wherein the delta cover (6) is of isosceles right triangle construction.

7. The modular steel plate-encased concrete composite shear wall of claim 6, further comprising a connecting cover plate (4), wherein the connecting cover plate (4) is fixed to the connecting area of the embedded steel plate (1).

8. The construction method of the modular assembled steel plate-encased concrete composite shear wall according to claim 7, comprising the following steps:

(1) Cutting the embedded steel plate (1) according to the shape and the size of the processing drawing, and forming holes at positions corresponding to the connecting areas of the embedded steel plate (1) to serve as connecting structures;

(2) Triangular cover plates (6) are welded at four corners of a core area of the embedded steel plate (1), four rib plates (7) in the vertical direction are welded around the core area of the embedded steel plate (1), and the four rib plates (7) are connected end to form a stiffening frame, and the stiffening frame and the core area of the embedded steel plate (1) form a concrete mould;

(3) Welding a plurality of pegs (2) in the core area of the embedded steel plate (1);

(4) Paving a reinforcing mesh (13) in a core area of the embedded steel plate (1), and connecting the end part of the reinforcing steel bar positioned at the outermost side on the reinforcing mesh (13) with the rib plate (7);

(5) And (3) pouring concrete in the core area of the embedded steel plate (1) and then carrying out standard maintenance.

9. The construction method of the modular assembled steel plate-encased concrete composite shear wall according to claim 8, wherein the end part of the steel bar positioned on the outermost side of the steel bar mesh (13) is in spot welding connection with the rib plate (7).

10. The method of constructing a modular steel plate encased concrete composite shear wall of claim 8, wherein the concrete strength grade is not less than C25.