Shear wall structure based on 3D printing and construction method thereof

Abstract

The invention discloses a shear wall structure based on 3D printing and a construction method thereof, belongs to the technical field of building structures, and can solve the problem that the structural performance of an existing 3D printing shear wall is difficult to meet various application requirements. The shear wall structure comprises an outer wall shell, a plurality of first protrusions are arranged on the inner wall of the outer wall shell, and a first containing area is formed between the adjacent first protrusions and the inner wall; the core wall plate is arranged in the outer wall shell, a second bulge is arranged on the side wall of the core wall plate in a position opposite to the first bulge, and a second accommodating area is formed between the adjacent second bulge and the side wall; the outer wall shell and the core wall plate are formed through 3D printing; the steel reinforcement framework is arranged between the outer wall shell and the core wall plate; the damping material is arranged in the first accommodating area and the second accommodating area; a vacant area between the outer wall shell and the core wall plate is filled with the concrete material. The method is used for constructing the shear wall structure.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of shear wall structure based on 3D printing and its construction method, belong to building structure technical field. BACKGROUND

[0002] At present, 3D printing technology has gradually been applied to the field of construction, and the shear wall structure based on 3D printing has the advantages of no need to build template, flexible and variable configuration, saving building materials, etc., which greatly improves the building efficiency and the level of building industrialization compared with traditional shear wall structure. However, the existing 3D printing shear wall structure generally has the following defects:

[0003] (1) Insufficient seismic performance. The existing 3D printing shear wall is mostly formed by stacking a single material, without setting up anti-seismic components, and without reserving space for arranging anti-seismic components in the wall, which leads to insufficient seismic performance of the shear wall, especially the stress concentration parts such as connecting joints are prone to brittle failure, which cannot meet the seismic performance requirements of shear wall in high-intensity earthquake areas.

[0004] (2) The lateral force resisting structure cannot be adapted to the 3D printing process. Traditional shear wall structure usually improves the shear and bending resistance by setting up lateral force resisting structures such as concealed columns and edge components (such as end columns and corner columns). These lateral force resisting structures are usually built by pre-embedding steel bars and then pouring as a whole. However, 3D printing adopts a "layer-by-layer stacking" construction method, and pre-embedding steel bars will cause problems such as obstruction of the printing nozzle path, uneven material accumulation, and interruption of printing, which seriously affect the construction quality and continuity.

[0005] (3) Limited structural stability and printing height. The surface between layers of 3D printing shear wall is smooth, and the interlayer contact area is limited. As the height of the wall increases, the wall is insufficient in resisting interlayer shear force and is prone to overturning or delamination under the action of gravity and lateral disturbance, especially at places with sharp curvature changes. At present, the printing height of the wall is generally difficult to exceed 5 meters, which cannot meet the structural requirements of high-rise or multi-story buildings.

[0006] The existing 3D printing shear wall cannot meet various application requirements due to the above-mentioned defects, and its adaptability is limited. SUMMARY

[0007] The present application provides a shear wall structure based on 3D printing and its construction method, which can solve the problem that the structural performance of the existing 3D printing shear wall cannot meet various application requirements.

[0008] In one aspect, the present application provides a shear wall structure based on 3D printing, which comprises:

[0009] an outer wall shell having a plurality of first protrusions on its inner wall, and a first accommodation area being formed between adjacent first protrusions and the inner wall;

[0010] a core wall plate arranged in the outer wall shell, and having second protrusions on the side wall at positions opposite to the first protrusions, and forming second accommodation areas between adjacent second protrusions and the side wall; the outer wall shell and the core wall plate are formed by 3D printing;

[0011] a steel framework arranged between the outer wall shell and the core wall plate;

[0012] damping and shock-absorbing materials arranged in the first accommodation areas and the second accommodation areas;

[0013] concrete materials filled in the empty areas between the outer wall shell and the core wall plate.

[0014] Optionally, the first protrusions and the second protrusions have the same shape, and the first protrusions and the second protrusions are T-shaped.

[0015] Optionally, the outer wall shell comprises an arc-shaped wall shell and an L-shaped wall shell;

[0016] the L-shaped wall shell is located on the side of the center of the arc-shaped wall shell, and one end of the L-shaped wall shell is in communication with one end of the arc-shaped wall shell, and the other end of the L-shaped wall shell extends towards the arc-shaped wall shell; and a plurality of first protrusions are arranged on the inner walls of the L-shaped wall shell and the arc-shaped wall shell.

[0017] Optionally, the steel framework comprises:

[0018] a steel mesh arranged between the first protrusions and the second protrusions;

[0019] a plurality of columnar steel cages respectively arranged at two ends of the outer wall shell and at each bending position of the outer wall shell, and connected with the steel mesh.

[0020] Optionally, the damping and shock-absorbing materials are rubber pads or metal cores.

[0021] Optionally, the concrete materials are fiber-reinforced self-compacting concrete.

[0022] In another aspect, the present application provides a construction method of any one of the above-mentioned 3D-printed shear wall structures, and the construction method comprises:

[0023] S1, using a 3D printing device to print an outer wall shell and a core wall plate, and curing the printed outer wall shell and core wall plate for a first preset time;

[0024] S2, manufacturing a steel mesh and a plurality of columnar steel cages, welding the plurality of columnar steel cages with the steel mesh to form a steel framework, and then placing the steel framework between the outer wall shell and the core wall plate;

[0025] S3, inserting damping and shock-absorbing materials into the first accommodating area and the second accommodating area, and fixing the damping and shock-absorbing materials with the outer wall shell or the core wall plate;

[0026] S4, pouring concrete materials into the empty area between the outer wall shell and the core wall plate according to preset conditions, and curing the concrete materials for a second preset time after pouring is completed.

[0027] Optionally, the preset conditions include that the fluidity of the concrete materials is 650mm-750mm, and the pouring speed is less than or equal to 2m / h.

[0028] Optionally, the first preset time is 3d-7d.

[0029] Optionally, the second preset time is 14d-28d.

[0030] The beneficial effects that can be produced by the present application include:

[0031] The present application sets a plurality of first protrusions and a plurality of second protrusions on the outer wall shell and the core wall plate to form the first accommodating area and the second accommodating area, facilitates the arrangement of damping and shock-absorbing materials, and improves the anti-seismic performance of the 3D-printed shear wall, so that the 3D-printed shear wall meets the anti-seismic performance requirements of shear walls in high-intensity earthquake areas. At the same time, the plurality of first protrusions and the plurality of second protrusions increase the interlayer contact area of the wall, improve the resistance of the wall to interlayer shear force, and thus increase the allowable printing height of the wall, so that the 3D-printed shear wall structure can meet the structural requirements of high-rise or multi-story buildings. On this basis, the steel reinforcement cage is arranged between the 3D-printed outer wall shell and the core wall plate, which can avoid interference between the printing nozzle and the steel reinforcement cage, ensure the construction quality and continuity. At the same time, based on the columnar steel reinforcement cage in the steel reinforcement cage, a concealed column and other lateral force resisting structures can be poured to form, thereby improving the shear and bending resistance of the 3D-printed shear wall. In addition, the present application adopts an arrangement form combining arc-shaped walls and linear walls, has a mixed boundary of curves and lines, has not only mechanical functions to enhance the self-stability of the wall, but also functions of space division and enclosure. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The structure schematic diagram of the shear wall structure based on 3D printing provided by the embodiment of the present application is shown;

[0033] Figure 2 The top view of the shear wall structure based on 3D printing provided by the embodiment of the present application is shown; Figure 1

[0034] Figure 3 The structure schematic diagram of the outer wall shell and the core wall plate provided by the embodiment of the present application is shown;

[0035] Figure 4 ​A structural schematic diagram of a steel reinforcement frame provided by an embodiment of the present application is shown in the figure.

[0036] Figure 5 A structural schematic diagram of a steel reinforcement frame at an arc-shaped wall shell provided by an embodiment of the present application is shown in the figure.

[0037] Figure 6 A structural schematic diagram of a steel reinforcement frame at an L-shaped wall shell provided by an embodiment of the present application is shown in the figure.

[0038] Figure 7 A splicing schematic diagram of multiple shear walls provided by an embodiment of the present application is shown in the figure.

[0039] Reference signs:

[0040] 1, outer wall shell; 11, first protrusion; 2, core wall plate; 21, second protrusion; 3, steel reinforcement frame; 31, steel mesh; 32, columnar steel cage. DETAILED DESCRIPTION

[0041] The present application will be described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0042] An embodiment of the present application provides a shear wall structure based on 3D printing, as shown in the figures, Figure 1 and Figure 2 The shear wall structure comprises:

[0043] An outer wall shell 1 has a plurality of first protrusions 11 on its inner wall, and a first accommodation area is formed between adjacent first protrusions 11 and the inner wall;

[0044] A core wall plate 2 is arranged in the outer wall shell 1, and has second protrusions 21 on its side wall at positions opposite to the first protrusions 11, and a second accommodation area is formed between adjacent second protrusions 21 and the side wall; the outer wall shell 1 and the core wall plate 2 are formed by 3D printing;

[0045] A steel reinforcement frame 3 is arranged between the outer wall shell 1 and the core wall plate 2;

[0046] Damping and shock-absorbing materials are arranged in the first and second accommodation areas;

[0047] Concrete materials are filled in the empty areas between the outer wall shell 1 and the core wall plate 2.

[0048] The first protrusions 11 and the second protrusions 21 have the same shape, and the first protrusions 11 and the second protrusions 21 can be T-shaped, triangular or trapezoidal, and the smaller end of the geometric size is connected to the outer wall shell 1 or the core wall plate 2.

[0049] This embodiment establishes a first receiving area and a second receiving area by setting multiple first protrusions 11 and multiple second protrusions 21 on the outer wall shell 1 and the core wall panel 2. This facilitates the placement of damping and shock-absorbing materials, thereby improving the seismic performance of the 3D-printed shear wall and ensuring that the 3D-printed shear wall meets the seismic performance requirements for shear walls in high-intensity earthquake zones. Simultaneously, the multiple first protrusions 11 and multiple second protrusions 21 increase the interlayer contact area of ​​the wall, enhancing its resistance to interlayer shear forces and thus increasing the allowable printing height of the wall. This allows the 3D-printed shear wall structure to meet the structural requirements of high-rise or multi-story buildings.

[0050] In this embodiment, as Figure 3 As shown, the outer wall shell 1 includes an arc-shaped wall shell and an L-shaped wall shell. The L-shaped wall shell is located on the central side of the arc-shaped wall shell, with one end connected to one end of the arc-shaped wall shell and the other end extending towards the arc-shaped wall shell. A plurality of first protrusions 11 are provided on the inner walls of the L-shaped wall shell and the arc-shaped wall shell.

[0051] This embodiment combines curved and straight walls to form a "G"-shaped shear wall, giving the shear wall both curved and straight boundaries. This not only improves the mechanical function of the shear wall and enhances its self-stability, but also enables the shear wall to have both spatial division and enclosure functions.

[0052] In practical applications, the outer wall shell 1 may also include only an arc-shaped wall shell or only an L-shaped wall shell, thereby constructing an arc-shaped shear wall or an L-shaped shear wall.

[0053] In this embodiment, as Figure 4 to Figure 6 As shown, the steel reinforcement cage 3 includes:

[0054] The reinforcing mesh 31 is disposed between the first protrusion 11 and the second protrusion 21. The reinforcing mesh 31 is formed by the cross connection of several longitudinally distributed main reinforcing bars and several transversely distributed horizontal reinforcing bars.

[0055] Multiple columnar reinforcing cages 32 are located inside the outer wall shell 1, respectively positioned at both ends and at each bend of the outer wall shell 1, and connected to the reinforcing mesh 31. In this embodiment, the multiple columnar reinforcing cages 32 are respectively positioned at the ends of the arc-shaped wall shell and the L-shaped wall shell, as well as at the junction of the arc-shaped wall shell and the L-shaped wall shell. The columnar reinforcing cages 32 are formed by the cross-connection of several longitudinally distributed main reinforcing bars and several transversely distributed stirrups. The columnar reinforcing cages 32 are used to form hidden columns after subsequent concrete pouring, which can improve the shear and bending resistance of the 3D-printed shear wall.

[0056] All reinforcing bars are connected by straight threaded sleeves and welding to ensure structural continuity; the reinforcing mesh 31 and multiple columnar reinforcing cages 32 are firmly welded together to form an integral reinforcing skeleton 3, which can effectively improve the load-bearing capacity and ductility reserve of the wall structure.

[0057] In this embodiment, the damping material is a rubber pad or a metal core, and the concrete material is fiber-reinforced self-compacting concrete (FR-SCC) or ordinary concrete.

[0058] Another embodiment of the present invention provides a construction method for any of the above-described 3D-printed shear wall structures, the construction method comprising:

[0059] S1. Use 3D printing equipment to print the outer wall shell 1 and core wall panel 2, and cure the printed outer wall shell 1 and core wall panel 2 for a first preset time to allow the outer wall shell 1 and core wall panel 2 to finally set. The first preset time is 3d to 7d. At this time, the structural strength of the outer wall shell 1 and core wall panel 2 can withstand the self-weight and lateral pressure of the steel reinforcement skeleton 3 and the subsequent pouring process.

[0060] S2. Fabricate steel mesh 31 and multiple columnar steel cages 32, and weld the steel mesh 31 to the multiple columnar steel cages 32 to form a steel skeleton 3. Then, place the steel skeleton 3 between the outer wall shell 1 and the core wall panel 2 by means of hoisting or other methods.

[0061] S3. Damping and vibration damping materials are installed in the first and second accommodating areas. The damping and vibration damping materials in the first accommodating area are fixedly connected to the outer wall shell 1, and the damping and vibration damping materials in the second accommodating area are fixedly connected to the core wall panel 2.

[0062] S4. Pour FR-SCC into the empty area between the outer wall shell 1 and the core wall panel 2 according to the preset conditions, ensuring dense filling to prevent the damping and shock absorption material from floating or shifting, and without the need for vibration. After pouring, cure for the second preset time. The preset conditions include a concrete flowability of 650mm~750mm and a pouring speed of less than or equal to 2m / h; the second preset time is 14d~28d.

[0063] Before step S1, this embodiment can also model the outer wall shell 1 and the core wall panel 2 based on Building Information Modeling (BIM) and accurately determine the placement of the steel reinforcement skeleton 3 and the damping and shock absorption materials.

[0064] Verification has shown that the method described in this embodiment has the following significant technical effects:

[0065] (1) Improved seismic performance: The damping and shock absorption materials built into the shear wall can dissipate the input energy of the structure under dynamic loads such as earthquakes, which significantly enhances the structural ductility of the wall and makes the hysteresis curve fuller. The equivalent damping ratio is increased by about 35%. Compared with traditional shear walls, the plastic hinge zone appears later and the failure mode is more controllable.

[0066] (2) Improved overall stability: The first protrusion 11 and the second protrusion 21 not only bear the functions of shear and bending moment transmission, but also have the function of deformation buffering, enhancing the continuity of the structure, and are particularly suitable for the transition area of ​​complex load paths.

[0067] (3) Improved construction efficiency: The outer wall shell 1 and core wall panel 2 are printed using 3D printing technology, and the steel reinforcement skeleton 3 is prefabricated, which significantly reduces on-site manual operation and shortens the overall construction cycle by about 20%. It also reduces the template installation and dismantling links in traditional construction and reduces construction errors.

[0068] (4) Improved structural integration: By combining curved and straight walls to form a "G"-shaped shear shell, the shear wall combines mechanical, spatial division, and enclosure functions, enhancing its combination and expansion capabilities. This makes the shear wall suitable for complex structural requirements such as curved enclosure structures, atrium structures, and special boundary transition areas. Figure 7 As shown, by arranging and splicing multiple "G"-shaped shear walls and L-shaped shear walls in an alternating manner, a circular space can be formed. The L-shaped shear walls not only enhance the overall stability of the wall structure, but also divide the circular space into more subdivided spaces to meet different spatial needs.

[0069] (5) Improved environmental friendliness and economy: Reduced use of disposable formwork reduces concrete waste. No vibration is required when pouring FR-SCC, reducing noise and dust pollution, and reducing overall material and construction costs by about 8%.

[0070] In summary, this invention, by setting multiple first protrusions 11 and multiple second protrusions 21 on the outer wall shell 1 and the core wall panel 2, forms a first accommodating area and a second accommodating area, facilitating the placement of damping and shock-absorbing materials to improve the seismic performance of the 3D-printed shear wall. This allows the 3D-printed shear wall to meet the seismic performance requirements of shear walls in high-intensity earthquake zones. Simultaneously, by setting multiple first protrusions 11 and multiple second protrusions 21, the interlayer contact area of ​​the wall is increased, improving the wall's resistance to interlayer shear forces and thus increasing the allowable printing height of the wall. This enables the 3D-printed shear wall structure to meet the structural requirements of high-rise or multi-story buildings. Furthermore, by placing a steel reinforcement cage 3 between the 3D-printed outer wall shell 1 and the core wall panel 2, interference between the printing nozzle and the steel reinforcement cage 3 can be avoided, ensuring construction quality and continuity. Additionally, based on the columnar steel reinforcement cage 32 in the steel reinforcement cage 3, lateral force resisting structures such as hidden columns can be cast, thereby improving the shear and bending resistance of the 3D-printed shear wall. In addition, the present invention adopts an arrangement that combines curved and straight walls, which has a mixed boundary of curves and straight lines. It not only has mechanical function and can enhance the self-stability of the wall, but also has the function of spatial division and enclosure.

[0071] The above description is merely a few embodiments of this application and is not intended to limit this application in any way. Although this application discloses preferred embodiments as described above, it is not intended to limit this application. Any changes or modifications made by those skilled in the art without departing from the scope of the technical solution of this application using the disclosed technical content are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A shear wall structure based on 3D printing, characterized in that, The shear wall structure includes: The outer wall shell has multiple first protrusions on its inner wall, and a first receiving area is formed between adjacent first protrusions and the inner wall. A core wall panel is disposed inside the outer wall shell, and a second protrusion is provided on its side wall at a position opposite to the first protrusion, and a second receiving area is formed between adjacent second protrusions and the side wall; the outer wall shell and the core wall panel are formed by 3D printing; A steel reinforcement frame is provided between the outer wall shell and the core wall panel; Damping and vibration reduction material is disposed in the first accommodating area and the second accommodating area; Concrete material is used to fill the void between the outer wall shell and the core wall panel.

2. The 3D-printed shear wall structure according to claim 1, characterized in that, The first protrusion and the second protrusion have the same shape, and the first protrusion and the second protrusion are T-shaped.

3. The 3D-printed shear wall structure according to claim 1, characterized in that, The outer wall shell includes an arc-shaped wall shell and an L-shaped wall shell; The L-shaped wall shell is located on the center side of the arc-shaped wall shell, with one end connected to one end of the arc-shaped wall shell and the other end extending towards the arc-shaped wall shell; a plurality of first protrusions are provided on the inner walls of the L-shaped wall shell and the arc-shaped wall shell.

4. The 3D-printed shear wall structure according to claim 3, characterized in that, The steel reinforcement cage includes: A steel mesh is disposed between the first protrusion and the second protrusion; Multiple columnar steel cages are respectively installed at both ends of the outer wall shell and at each bend of the outer wall shell, and are connected to the steel mesh.

5. The 3D-printed shear wall structure according to claim 1, characterized in that, The damping and shock absorption material is a rubber pad layer or a metal core.

6. The 3D-printed shear wall structure according to claim 1, characterized in that, The concrete material is fiber-reinforced self-compacting concrete.

7. A construction method for a shear wall structure based on 3D printing as described in any one of claims 1 to 6, characterized in that, The construction method includes: S1. Use 3D printing equipment to print the outer wall shell and core wall panel, and cure the printed outer wall shell and core wall panel for the first preset time. S2. Fabricate steel mesh and multiple columnar steel cages, and weld the multiple columnar steel cages to the steel mesh to form a steel skeleton. Then place the steel skeleton between the outer wall shell and the core wall panel. S3. Damping and vibration damping materials are installed in the first and second accommodating areas, and the damping and vibration damping materials are fixedly connected to the outer wall shell or core wall panel. S4. Pour concrete material into the empty area between the outer wall shell and the core wall panel according to the preset conditions, and cure for the second preset time after pouring.

8. The construction method according to claim 7, characterized in that, The preset conditions include a concrete material flowability of 650mm~750mm and a pouring speed of less than or equal to 2m / h.

9. The construction method according to claim 7, characterized in that, The first preset time is 3 days to 7 days.

10. The construction method according to claim 7, characterized in that, The second preset time is 14 days to 28 days.

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