A formwork-free assembled energy dissipation and shock absorption shear wall corner structure and connection method

Abstract

The present invention provides a formwork-free assembled energy-dissipating and shock-absorbing shear wall corner structure and connection method. The corner structure includes a vertical shear wall embedded formwork, with a set of horizontal shear wall embedded formwork symmetrically connected on both sides of the web of the vertical shear wall embedded formwork. Shear wall exterior panels are provided on the outside of all shear wall embedded formworks. The exterior sides of the vertical shear wall exterior panels and the exterior sides of the horizontal shear wall exterior panels are connected as a whole via angle steel. An energy-absorbing support member is provided between the two wings of the same angle steel. The interior sides of the vertical shear wall exterior panels and the interior sides of the horizontal shear wall exterior panels are connected as a whole via plug-in connectors. The exterior wall panels of the two horizontal shear walls are connected as a whole via the ends of the vertical shear wall embedded formwork. This invention solves the problem of connecting three prefabricated assembled shear walls without formwork, shortens the construction period, and improves the shear wall's bearing capacity, stability, and seismic performance.

Description

Technical Field

[0001] The present invention relates to the field of prefabricated walls, and in particular to a formwork-free prefabricated energy dissipation and shock-absorbing shear wall corner structure and a connection method. Background Art

[0002] With the rise of industrialization, prefabricated structures have seen significant development. Prefabricated structures involve prefabricating wall panels in factories, transporting them to the site for assembly, and pouring concrete joints. Compared to traditional cast-in-place structures, prefabricated structures can effectively shorten construction cycles and reduce on-site environmental pollution, offering advantages such as being environmentally friendly and low-carbon.

[0003] At present, the connection method of prefabricated shear walls is to cast the nodes on site, which requires complex processes such as pre-formwork, grouting sleeve connection, on-site casting, and maintenance. It is inefficient, increases environmental pollution, consumes manpower, and the cast-in-place node method of prefabricated shear walls has poor horizontal seismic resistance. Summary of the Invention

[0004] In response to the above problems, the present invention provides a formwork-free assembled energy dissipation and shock-absorbing shear wall corner structure and connection method, and solves the problem of connecting three prefabricated assembled shear walls without formwork, shortens the construction period, and improves the bearing capacity, stability and seismic performance of the shear wall.

[0005] The present invention adopts the following technical solutions:

[0006] A formwork-free assembled energy-dissipating and shock-absorbing shear wall corner structure comprises a vertical shear wall embedded formwork, wherein a group of horizontal shear wall embedded formwork is symmetrically connected on both sides of the web of the vertical shear wall embedded formwork; shear wall exterior wall panels are provided on the outside of all shear wall embedded formworks, the exterior sides of the vertical shear wall exterior wall panels and the exterior sides of the horizontal shear wall exterior wall panels are connected as a whole via angle steel, and an energy-absorbing support member is provided between the two wing plates of the same angle steel; the interior sides of the vertical shear wall exterior wall panels and the interior sides of the horizontal shear wall exterior wall panels are connected as a whole via plug-in connectors, and the exterior wall panels of the two horizontal shear walls are connected as a whole via the ends of the vertical shear wall embedded formworks.

[0007] Preferably, all shear wall embedded formworks include a front flange, a web and a rear flange connected in sequence, wherein the front flange, the web and the rear flange form an I-shaped structure, and the rear flange is a special-shaped structure made by bending a steel plate.

[0008] Preferably, longitudinal stiffening ribs are symmetrically provided on both sides of the web along the height direction of the shear wall, and at least one transverse stiffening rib is provided on both sides of the web between the longitudinal stiffening ribs and the rear flange.

[0009] Preferably, the horizontal shear wall embedded formwork is connected to the web of the vertical shear wall embedded formwork through the front flange, and the vertical shear wall embedded formwork is connected to the outer wall panel of the horizontal shear wall through the front flange.

[0010] Preferably, both side edges of the rear flange are symmetrically provided with concave and convex bending portions with respect to the web.

[0011] Preferably, the plug-in connector includes a vertical shear wall connector and a horizontal shear wall connector; the front end upper surface of the vertical shear wall connector is provided with an upper protrusion, and the side of the upper protrusion is provided with a retractable first elastic buckle; the front end of the horizontal shear wall connector is provided with a through hole that cooperates with the upper protrusion.

[0012] Preferably, the front end and side surfaces of the vertical shear wall connector are provided with side protrusions, the lower surface of the horizontal shear wall connector is provided with grooves that cooperate with the side protrusions, and both side walls of the groove are provided with retractable second elastic buckles.

[0013] Preferably, the surfaces of the vertical shear wall connectors and the surfaces of the horizontal shear wall connectors are both provided with serrated protrusions.

[0014] Preferably, the energy-absorbing support member includes a buffer tube, a spring is provided in the buffer tube, both ends of the spring are connected to a sliding rod, and the other end of the sliding rod protrudes from the buffer tube and is rotatably connected to the angle steel wing plate on the corresponding side.

[0015] The present invention also discloses a connection method of the above structure, which is as follows:

[0016] S1: Use shear wall embedded formwork, shear wall exterior wall panels and shear wall connectors to form a frame, pour concrete into the frame, and prefabricate horizontal shear wall units and vertical shear wall units;

[0017] S2: Use the hoisting assembly to assemble the adjacent shear wall units by plugging connectors;

[0018] S3: Bolt the front flanges of the two horizontal shear wall embedded formwork to the web of the vertical shear wall embedded formwork, and bolt the front flanges of the vertical shear wall embedded formwork to the exterior wall panels of the horizontal shear walls on both sides.

[0019] S4: Use bolts to fix the angle steel at the connection between the vertical shear wall outer wall panel and the horizontal shear wall outer wall panel;

[0020] S5: Install the energy dissipation support member on the angle steel;

[0021] S6: Pour concrete into the cavity formed by the three shear wall elements.

[0022] Preferably, in step S1, after the shear wall unit is prefabricated, the front flange of the embedded formwork, a portion of the web and a portion of the plug-in connector all protrude beyond the side plane of the wall cast in concrete.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention can be prefabricated in the factory in advance to realize intelligent production, thereby significantly improving production efficiency while ensuring the stability and consistency of product quality.

[0025] 2. The present invention embeds the formwork in the shear wall, giving full play to the high bearing capacity and stability of the embedded formwork, so that the shear wall exhibits better seismic performance when facing external loads.

[0026] 3. When the shear wall is connected on site, the present invention does not require supporting the embedded formwork or removing the embedded formwork, thereby reducing manual intervention, effectively shortening the project cycle, improving construction efficiency, and reducing costs.

[0027] 4. The present invention mainly adopts pre-fixation of connectors and bolt connection, which has the characteristics of high precision and prevention of component deviation, convenient operation, reduced labor requirements, and at the same time ensures reliable connection and stability of the building structure.

[0028] 5. The present invention uses energy-absorbing support components between adjacent shear walls, which can effectively resist earthquake loads, reduce the seismic displacement of shear walls, significantly enhance the bearing capacity and stability of shear walls, and provide a solid guarantee for the safety of building structures.

[0029] 6. The present invention pours concrete between the embedded formwork and the exterior wall panel, which is not easy to leak, making the entire structure an integral whole, thereby enhancing the overall strength and stability.

[0030] 7. The present invention pours concrete after bolt connection, which enhances the connection ability of the bolts and prevents them from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 It is a top view of the overall structure of the present invention;

[0033] Figure 2 It is a three-dimensional diagram of the overall structure of the present invention;

[0034] Figure 3 It is an exploded view of the overall structure of the present invention;

[0035] Figure 4 This is the prefabrication rendering of the horizontal shear wall unit;

[0036] Figure 5 This is a rendering of the prefabrication of vertical shear wall units;

[0037] Figure 6 This is a schematic diagram of the shear wall embedded formwork structure;

[0038] Figure 7 This is a structural diagram of the three shear wall embedded formwork connected;

[0039] Figure 8 It is the installation structure diagram of the energy-absorbing support component;

[0040] Figure 9 It is a schematic diagram of the internal structure of the energy-absorbing support component;

[0041] Figure 10 1. It is a schematic diagram of the plug connector structure;

[0042] Figure 11 is a cross-sectional view of a plug connector;

[0043] Figure 12 It is a structural diagram of the bottom groove of the horizontal shear wall connector.

[0044] In the figure, 1. vertical shear wall exterior wall panel, 2. first horizontal shear wall exterior wall panel, 3. second horizontal shear wall exterior wall panel, 4. vertical shear wall embedded formwork, 5. first horizontal shear wall embedded formwork, 6. second horizontal shear wall embedded formwork, 7. angle steel, 8. vertical shear wall connector, 9. horizontal shear wall connector, 10. energy-absorbing support member, 11. support seat, 12. steel plate, 4.1. front flange, 4.2. web, 4.3. transverse stiffening rib, 4.4. longitudinal stiffening rib, 4.5. rear flange, 8.1. upper protrusion, 8.2. first elastic buckle, 8.3. side protrusion, 9.1. through hole, 9.2. groove, 9.3. second elastic buckle, 10.1. sliding rod, 10.2. spring, 10.3. buffer cylinder. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] In the description of the present invention, it should be understood that the terms "inside", "outside", "left" and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] The present invention discloses Figure 1-12 The illustrated embodiment shows a formwork-free assembled energy-dissipating and shock-absorbing shear wall corner structure, which consists of a first horizontal shear wall exterior wall panel 2, a second horizontal shear wall exterior wall panel 3, a vertical shear wall exterior wall panel 1, a first horizontal shear wall embedded formwork 5, a second horizontal shear wall embedded formwork 6, a vertical shear wall embedded formwork 4, a vertical shear wall connector 8, a horizontal shear wall connector 9, an energy-absorbing support member 10 and an angle steel 7 to form a frame, which is then poured with concrete to prefabricate three groups of shear wall units, and then assembled into a shear wall corner frame through steel plates 12 and hexagonal bolts, and finally concrete is poured in the frame to form it.

[0048] The connecting edges of the horizontal and vertical shear wall panels 1 are pre-threaded. For example, the edges where the first horizontal shear wall panel 2 and the second horizontal shear wall panel 3 meet are each provided with a row of threaded holes for connecting to the steel plate 12. The edges where the two horizontal shear wall panels meet the vertical shear wall panel 1 are provided with two rows of threaded holes for connecting to the angle steel 7. The edges where the vertical shear wall panel 1 meets the horizontal shear wall panel are also provided with two rows of threaded holes for connecting to the other wing of the angle steel 7.

[0049] At least two sets of plug-in connectors are arranged from top to bottom on the inner side of the joint between the vertical shear wall panel 1 and the two horizontal shear wall panels. These connectors include a vertical shear wall connector 8 arranged between the two vertical shear wall panels and a horizontal shear wall connector 9 arranged between the two horizontal shear wall panels. The outer surfaces of both connectors are serrated, ensuring they can be fully connected to the concrete after pouring. Both the front end of the vertical shear wall connector 8 and the rear end of the horizontal shear wall connector 9 are provided with a raised portion.

[0050] like Figure 10 、 Figure 11 and Figure 12 As shown, a cylindrical upper convex block 8.1 is provided on the front upper surface of the vertical shear wall connector 8, and a through hole 9.1 is provided on the front end of the horizontal shear wall connector 9 to cooperate with the upper convex block 8.1. Figure 10 and Figure 11As shown, a retractable first elastic buckle 8.2 is provided on the outer side surface of the upper protrusion 8.1, and the first elastic buckle 8.2 includes a compression spring connected to the center of the upper protrusion 8.1 and a clamping block located at the outer end of the compression spring. The compression spring is multiple pieces, and the multiple compression springs are evenly arranged in a circular shape along the center of the upper protrusion. Each compression spring is connected to a corresponding clamping block, and multiple side holes are processed on the side of the upper protrusion 8.1. The end of the clamping block away from the spring passes through the side hole of the upper protrusion 8.1 outward and then protrudes from the outer surface of the upper protrusion 8.1. During insertion of the upper protrusion 8.1 into the through-hole 9.1, the block is squeezed by the sidewall of the through-hole, causing the block to press against the compression spring inside the upper protrusion 8.1, causing the block to retract into the interior of the upper protrusion 8.1. After the upper protrusion 8.1 passes through the through-hole 9.1, the restoring force of the compression spring causes the block to protrude from the outside of the upper protrusion 8.1 and become lodged above the through-hole 9.1, thereby achieving the interconnection between the vertical shear wall connector 8 and the horizontal shear wall connector 9 and preventing them from slipping. To facilitate the retraction of the block during insertion and prevent it from retracting after insertion is complete, the block is designed with an inclined upper surface and a flat lower surface.

[0051] The lower surface of the horizontal shear wall connector 9 is provided with a groove 9.2. The sidewalls of the groove are symmetrically provided with a retractable second elastic clip 9.3. This second elastic clip 9.3 includes a compression spring connected to the inner wall of the groove 9.2 and a block mounted on the end of the compression spring. The rear end side of the vertical shear wall connector 8 is provided with a cubic side projection 8.3 for insertion into the groove 9.2 during insertion. During insertion, the side projection squeezes the block of the second elastic clip. When the side projection 8.3 is fully inserted into the groove, the block of the second elastic clip 9.3 is reset by the restoring force of the compression spring, confining the side projection 8.3 within the groove and preventing it from slipping out. To facilitate the retraction of the block during insertion and prevent it from retracting after insertion, the block is designed with an inclined lower surface and a flat upper surface.

[0052] The first horizontal shear wall embedded formwork 5 and the second horizontal shear wall embedded formwork 6 are as follows Figure 6 As shown, the structure of the vertical shear wall embedded template 4 is as follows Figure 5 As shown, each comprises an I-shaped frame formed by welding a front flange 4.1, a web 4.2, and a rear flange 4.5. Longitudinal stiffening ribs 4.4 are welded to the left and right sides of the web 4.2. Multiple parallel transverse stiffening ribs 4.3 are welded to the web portion of each longitudinal stiffening rib 4.4 near the front flange 4.1. The left and right ends of the rear flange 4.5 are reinforced with concave and convex portions formed by transversely bent steel plates to increase the strength of the rear flange.

[0053] To facilitate the flat connection of the front flanges, screw holes are pre-installed on the left and right front flanges of the web. To enhance vertical load-bearing capacity, longitudinal stiffeners 4.4 are installed on the web. Transverse stiffeners 4.3 are provided to enhance stability. To strengthen the connection between the concrete and the formwork, the rear flanges are designed with a concave and convex surface and pre-installed within the shear wall.

[0054] The width of the front and rear flanges should be no wider than the width of the precast wall unit. The vertical stiffeners should be slightly narrower than the front and rear flanges, and the transverse stiffeners should be the same width as the vertical stiffeners. Place half of the formwork into the shear wall, paying attention to the placement of the wall screw holes and flanges.

[0055] Furthermore, the screw holes on the front flange of the embedded template for the horizontal shear wall are aligned with the screw holes on the web of the embedded template for the vertical shear wall, and the two shear wall panels are fixed with angle steel 7. The flanges of the angle steel 7 are pre-set with screw holes, which are aligned with the screw holes of the vertical and horizontal shear wall panels.

[0056] Furthermore, the front flange of the horizontal shear wall embedded formwork is aligned with the screw holes of the vertical shear wall embedded formwork web, and the two shear wall exterior panels are fixed with angle steels.

[0057] Furthermore, the embedded formwork of the three shear walls was connected with bolts, and the steel plates and energy-absorbing support components were installed.

[0058] Between the two wings of the angle steel 7, multiple energy dissipation support members 10 are arranged parallel to each other from top to bottom, such as Figure 8 and Figure 9 As shown, the energy dissipation support member 10 comprises a sliding rod 10.1, a spring 10.2, and a buffer tube 10.3. To connect, first secure the support base 11 to the angle steel 7, then remove the support base bolts and install the energy dissipation support member. The installation structure of a set of energy dissipation support members is as follows: Each wing of the angle steel 7 is mounted with a support base 11. Each support base 11 is rotatably connected to a sliding rod 10.1. The other end of the sliding rod extends into the buffer tube 10.3 and connects to the spring 10.2 inside the buffer tube.

[0059] All the preset screw holes mentioned above must meet the following specifications:

[0060] 1. Load-bearing requirements: To prevent shearing of the steel plate ends, the bolt end spacing should be no less than 2d0, where d0 is the bolt hole diameter. For tension members, the bolt spacing and line spacing of each row of bolts should not be too small. Otherwise, stress concentration around the bolts will significantly affect each other, and the cross-section of the steel plate will be excessively weakened, thereby reducing its load-bearing capacity. For compression members, the bolt spacing along the direction of the applied force should not be too large, otherwise convexity will easily occur between the connected plates.

[0061] 2. Structural requirements: If the bolt spacing and line spacing are too large, the contact surface of the components will not be tight enough, and moisture can easily penetrate the gaps and cause rust.

[0062] 3. Construction requirements: Ensure there is a certain amount of space to facilitate turning the bolt wrench.

[0063] The present invention also discloses a formwork-free assembled energy dissipation and shock absorption shear wall corner structure and a connection method, comprising the following steps:

[0064] S1: Prefabricate shear wall units in the factory and pre-set screw holes;

[0065] S2: Check the hoisting equipment and first lift the prefabricated horizontal shear wall unit and vertical shear wall unit to the corresponding position;

[0066] S3: Lower the first horizontal shear wall unit vertically, and pre-connect and fix the vertical shear wall unit and the first horizontal shear wall unit through the plug-in connector. Specifically, pass the through hole 9.1 through the upper protrusion 8.1, and place the side protrusion 8.3 into the groove 9.2 until the first elastic clip 8.2 and the second elastic clip 9.3 rebound, and then the preliminary connection is made.

[0067] S4: Use the hexagonal nuts of the connecting angle steel to pass through the screw holes of the supporting member, the screw holes of the angle steel and the screw holes of the horizontal shear wall to fix the support of the energy dissipation supporting member and the two shear walls;

[0068] S5: Fix the second horizontal shear wall unit and the vertical shear wall unit in the same way;

[0069] S6: Further, hexagonal bolts are inserted through the screw holes of the first horizontal shear wall embedded formwork 5, the web screw holes of the vertical shear wall embedded formwork 4, and the screw holes of the second horizontal shear wall embedded formwork to connect the three shear wall embedded formworks into a whole.

[0070] S7: Further, use a connecting steel plate hexagonal nut to pass through the screw hole of the steel plate 12 and the front flange screw hole of the vertical shear wall embedded template 4, and use a connecting steel plate hexagonal nut to pass through the screw hole on the outside of the steel plate and the screw holes of the two horizontal shear wall outer wall panels to form a whole;

[0071] S8: Further, the energy dissipation support member is installed using the nut for assembling the support member;

[0072] S9: Furthermore, in order to improve the bonding strength between the formwork and the concrete, a layer of interface agent is applied on the formwork, and concrete is poured in the space between the three shear walls and the embedded formwork to improve the integrity of the component, increase the connection performance of the bolts and the bearing capacity of the structure.

[0073] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A formwork-free assembled energy dissipation and shock absorption shear wall corner structure, characterized in that: The invention comprises a vertical shear wall embedded template (4), wherein a set of horizontal shear wall embedded templates are symmetrically connected to both sides of the web of the vertical shear wall embedded template; shear wall outer wall panels are arranged on the outside of all the shear wall embedded templates; the outer side of the vertical shear wall outer wall panel (1) and the outer side of the horizontal shear wall outer wall panel are connected as a whole through angle steel (7); an energy dissipation support member (10) is arranged between the two wing plates of the same angle steel; the inner side of the vertical shear wall outer wall panel (1) and the inner side of the horizontal shear wall outer wall panel are connected as a whole through a plug-in connector; the outer wall panels of the two horizontal shear walls are connected as a whole through the end of the vertical shear wall embedded template (4); All shear wall embedded templates include a front flange (4.1), a web (4.2), and a rear flange (4.5) connected in sequence, wherein the front flange (4.1), the web (4.2), and the rear flange (4.5) form an "I"-shaped structure, and the rear flange (4.5) is a special-shaped structure made by bending a steel plate; both sides of the rear flange (4.5) are symmetrically provided with concave and convex bending portions with respect to the web (4.2); The horizontal shear wall embedded formwork is connected to the web (4.2) of the vertical shear wall embedded formwork via the front flange (4.1), and the vertical shear wall embedded formwork is connected to the outer wall panel of the horizontal shear wall via the front flange (4.1); The plug-in connector comprises a vertical shear wall connector (8) and a horizontal shear wall connector (9); an upper protrusion (8.1) is provided on the upper surface of the front end of the vertical shear wall connector (8), and a retractable first elastic buckle (8.2) is provided on the side of the upper protrusion (8.1); and a through hole (9.1) is provided at the front end of the horizontal shear wall connector (9) to cooperate with the upper protrusion (8.1); The front end and side surfaces of the vertical shear wall connector (8) are provided with side protrusions (8.3), the lower surface of the horizontal shear wall connector (9) is provided with grooves (9.2) that cooperate with the side protrusions (8.3), and both side walls of the groove (9.2) are provided with retractable second elastic buckles (9.3).

2. The formwork-free assembled energy dissipation and shock absorption shear wall corner structure according to claim 1 is characterized in that: Longitudinal stiffening ribs (4.4) are symmetrically arranged on both sides of the web (4.2) along the height direction of the shear wall, and at least one transverse stiffening rib (4.3) is arranged on both sides of the web (4.2) between the longitudinal stiffening rib (4.4) and the rear flange (4.5).

3. The formwork-free assembled energy dissipation and shock absorption shear wall corner structure according to claim 1, characterized in that: The surface of the vertical shear wall connector (8) and the surface of the horizontal shear wall connector (9) are both provided with sawtooth-shaped protrusions.

4. The formwork-free assembled energy dissipation and shock absorption shear wall corner structure according to claim 1, characterized in that: The energy-absorbing support component comprises a buffer cylinder (10.3), a spring (10.2) is arranged in the buffer cylinder, both ends of the spring are connected to a sliding rod (10.1), and the other end of the sliding rod protrudes from the buffer cylinder and is rotatably connected to the angle steel wing plate on the corresponding side.

5. A method for connecting shear wall corners in a formwork-free assembled energy dissipation and shock absorption shear wall corner structure according to any one of claims 1 to 4, characterized in that: The details are as follows: S1: Use shear wall embedded formwork, shear wall exterior wall panels and shear wall connectors to form a frame, pour concrete into the frame, and prefabricate horizontal shear wall units and vertical shear wall units; S2: Use the hoisting assembly to assemble the adjacent shear wall units by plugging connectors; S3: Bolt the front flanges of the two horizontal shear wall embedded formwork to the web of the vertical shear wall embedded formwork, and bolt the front flanges of the vertical shear wall embedded formwork to the exterior wall panels of the horizontal shear walls on both sides. S4: Use bolts to fix the angle steel at the connection between the vertical shear wall outer wall panel and the horizontal shear wall outer wall panel; S5: Install the energy dissipation support member on the angle steel; S6: Pour concrete into the cavity formed by the three shear wall elements.

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