CN221298304U

CN221298304U - Take prefabricated assembled shear force wall hybrid connection node of damping shock attenuation

Info

Publication number: CN221298304U
Application number: CN202323344937.4U
Authority: CN
Inventors: 褚云朋; 易港鑫; 黄晗; 江天勇; 范仕强; 蒲冠宇; 肖雅馨; 李勤; 王鑫
Original assignee: Southwest University of Science and Technology
Current assignee: Southwest University of Science and Technology
Priority date: 2023-12-08
Filing date: 2023-12-08
Publication date: 2024-07-09
Anticipated expiration: 2033-12-08

Abstract

The utility model provides a prefabricated shear wall mixed connection node with damping, belongs to the technical field of civil building structures, and solves the problems of insufficient mechanical property, poor wall connection reliability, lack of damping energy efficiency, low structural safety redundancy and the like of the connection node in the prior art. The anti-seismic steel structure comprises I-shaped steel embedded in an upper shear wall and a lower shear wall, wherein L-shaped connecting plates and damping devices are sequentially arranged on two sides of an overhanging web plate of the I-shaped steel, and meanwhile, connecting steel plates are arranged on the outermost side of the wall to form a first anti-seismic line. The assembled shear wall connection node with damping energy efficiency can ensure reliable connection of the upper shear wall and the lower shear wall through the optimal design of each component, the wall internal stress is effectively transmitted, the limited plastic damage area is transferred to the connecting steel plate and the inclined damping device outside the shear wall from the original beam-wall-floor slab, the energy consumption capability of the node can be enhanced, the premature shear pressure damage of the connecting bolts is delayed, and the anti-seismic safety redundancy of the assembled shear wall is effectively improved.

Description

Take prefabricated assembled shear force wall hybrid connection node of damping shock attenuation

Technical Field

The utility model relates to a prefabricated shear wall mixed connection node with damping.

Background

The assembled structure is a building structure which is installed on site, is beneficial to building industrialization and realizes sustainable development of building industry. The shear wall is used as an important lateral force resisting member in a building structure, and the mechanical property of a connecting node plays a vital role in the whole frame structure system. Meanwhile, the shear wall is used as a first anti-seismic defense line, the splicing area is usually a structure plastic weak area, and the reinforcing nodes are connected with the main body frame, so that the shear wall has strong energy consumption and deformation capacity, can resist horizontal shear force under the strong earthquake action, and is a key problem of node design. Compared with the traditional cast-in-situ shear wall structure system, the assembled shear wall connection node has the advantages of good construction quality, high construction speed, energy conservation, environmental protection and the like.

At present, common splicing modes of the assembled shear wall connection nodes are divided into wet connection and dry connection. The former needs to carry out secondary concreting and wait for solidification on site, and the contribution to shortening the construction period is extremely limited, and secondary concreting space is narrow and small simultaneously is difficult to fully vibrate, even influences the concreting quality. The latter is the most widely used assembled concrete structure connection technique, mainly includes sleeve grout connection, ring rib buckling connection and mechanical connection, also exerts the assembled structure advantage easiest, but the concatenation form of dry connection is also comparatively single in the present market, rarely possesses damping mechanism, is difficult to realize the multiple power consumption mechanism of structure, effective control installation accuracy to and component and main structure superstrong are connected. The assembled shear wall connection node is used as a key part of a structure, the connection performance of the assembled shear wall connection node directly influences the earthquake-resistant performance of the structure, the connection part can be used for reinforcing wall connection by using spring damping, energy can be dissipated in an earthquake, so that the structural response is reduced, and the effective transmission of stress between walls is ensured.

Chinese patent 200810047266.6 discloses a horizontal joint connection device and a method for an upper prefabricated shear wall and a lower prefabricated shear wall, wherein the device comprises an upper channel steel and a lower channel steel which are arranged on hidden columns at two ends of the upper prefabricated shear wall and the lower prefabricated shear wall; the web of the channel steel stretches out the hidden post and equally separates the bolt hole, and the web of channel steel is all parallel to prefabricated shear wall width direction, and the edge of a wing of channel steel is all parallel to prefabricated shear wall thickness direction, and the notch opposite direction of upper and lower portion channel steel simultaneously, when upper and lower prefabricated shear wall concatenation, the position of upper and lower portion channel steel is the alignment from beginning to end, and the web laminating of upper and lower portion channel steel is in the same place, and after the bolt hole of upper and lower portion channel steel was aligned, fixes through high strength bolt. The connecting method adopts the channel steel butt joint connection, has the advantages of simplifying the assembly process of the traditional assembled shear wall, shortening the construction period, improving the efficiency, saving the materials and the like, but has the defects of wet operation in site construction, and has limited application range.

Chinese patent 200810047266.6 discloses a vertical connection node of an integrally assembled shear wall, which comprises an upper layer shear wall and a lower layer shear wall, wherein a downward protruding platform is arranged in the middle of the bottom surface of the upper layer shear wall, front and rear half grouting sleeves are embedded in the platform, and steel gaskets are arranged at four angles. Two rows of steel bars extend out of the middle of the lower shear wall and are connected with two rows of half grouting sleeves in the protruding platform of the upper shear wall through grouting, so that a positioning-shearing resistant structure is formed; rectangular post-pouring sections are reserved on two sides of a convex platform of the upper shear wall, key grooves are formed in the upper shear walls on two sides of the convex platform, reinforcing steel bars extend upwards from positions, corresponding to the key grooves, of the lower shear wall, and penetrate through the rectangular post-pouring sections and extend upwards into the key grooves. The connecting method adopts the arrangement of the convex platform and the concave platform on the bottom surface of the shear wall for connection, reduces the use amount of the half grouting sleeve of the precast shear wall, reduces the production cost of components and improves the construction precision, but the node has no multiple energy consumption mechanism, has weak links and stress defects, and has difficult control of the failure mode, so the method has a limited application range.

In summary, the common joint connection mode of prefabricated shear walls mainly has the following defects: (1) The assembly rate is low, secondary pouring is still needed after the wall is connected, and the construction period is long; (2) The node structure is complex, so that the construction process is difficult, the operation efficiency is low, and the quality of the connecting node is difficult to ensure; (3) The single splicing mode has the defects of insufficient mechanical property and the like of the nodes, so that the wall connection reliability is poor, a plurality of anti-seismic defense lines are not provided, and the structural safety redundancy is low.

Disclosure of utility model

To the not enough of current assembled shear force wall connection node mechanical properties, this patent provides a prefabricated assembled shear force wall hybrid connection node of damping in area, aims at solving among the prior art that the connection node is loaded down with trivial details and the quality can't guarantee and causes the problem that the connection area is easy too early to destroy.

In order to achieve the above purpose, the technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a take prefabricated assembled shear force wall hybrid connection node of damping for upper and lower relative shear force wall connection that sets up, including taking welding sleeve's upper and lower I shaped steel, vertical symmetry sets up in upper and lower prefabricated shear force wall is inside, and the web that both stretches out the wall body is equidistant to be offered first through-hole in central line position, and upper and lower I shaped steel stretches out the broadside edge of wall body and laminates each other, and equidistant second through-hole and the third through-hole of offering in edge of a wing central line position. In addition, the L-shaped connecting plates with the same opening positions are symmetrically arranged on the left side and the right side of the web plate of the upper I-shaped steel and the lower I-shaped steel, wherein the flanges of the 4L-shaped connecting plates with ribs are aligned with the bottoms and the tops of the upper shear wall and the lower shear wall respectively in a front-back left-right manner. The connecting steel plate with holes is fixed with I-shaped steel embedded in the upper shear wall and the lower shear wall through the lengthening high-strength bolts, and the connecting steel plate is flush with the outer surfaces of the upper shear wall and the lower shear wall. Meanwhile, damping devices with telescopic deformation energy dissipation functions are vertically arranged in cavities at the front side and the rear side formed by the upper I-shaped steel overhanging webs and the lower I-shaped steel overhanging webs.

Further, the upper and lower I-shaped steel narrow flange and part of web plates are respectively embedded into the upper and lower shear walls, three rows of sleeve holes are formed in the embedded web plates in a staggered mode, the sleeves are vertically fixed on the web plates through welding, and the length of each sleeve is the thickness of the shear wall. The upper I-shaped steel broadside flanges and the lower I-shaped steel broadside flanges are equidistantly provided with second through holes, and the upper I-shaped steel broadside flanges and the lower I-shaped steel broadside flanges are connected and fastened through friction type high-strength bolts.

Furthermore, the ribbed flanges of the L-shaped connecting plates are aligned with the bottoms of the upper shear wall and the lower shear wall in a front-back and left-right manner and are symmetrically arranged on two sides of the overhanging web plate of the I-shaped steel, first through holes are formed in the center line of the web plate at equal intervals, and fourth through holes and lug plate connecting bolts are arranged on the ribbed flanges and used for assembling the damping device in the subsequent steps. Thus, the two L-shaped connecting plates of the upper shear wall are connected into a whole through the high-strength bolts and the upper I-shaped steel overhanging webs, and the two L-shaped connecting plates of the lower shear wall are connected into a whole through the high-strength bolts and the lower I-shaped steel overhanging webs.

Further, a damping device is arranged in the connecting node area of the upper shear wall and the lower shear wall, the number of the damping device is 8, the damping device is symmetrically arranged at the cavity of the overhanging web plate of the upper I-shaped steel and the lower I-shaped steel, the upper end of the damping device is fixed with a lug plate connecting bolt on a ribbed flange of the upper L-shaped connecting plate, the lower end of the damping device is fixed with a lug plate connecting bolt on the ribbed flange of the lower L-shaped connecting plate, and a third through hole is reserved on the overhanging broadside flange of the upper I-shaped steel and the lower I-shaped steel for installation of the damping device.

Further, the damping device is composed of 2 anti-seismic rods with lug plates at the ends and threads at the tails, 1 telescopic cylinder, 2 connecting blocks and 1 SMA spiral spring. The concrete assembly process is that the inside of the telescopic cylinder is provided with 2 connecting blocks which are respectively connected with two ends of the SMA spiral spring, and the bottom of the telescopic cylinder is provided with an opening with the same diameter as the anti-seismic rod. The two anti-seismic rods are respectively fixed with an upper connecting block and a lower connecting block with threaded holes at the bottoms through threaded connection. Thus, a damping device which can rotate transversely and stretch vertically is formed.

Furthermore, the outermost connecting steel plates and the upper and lower prefabricated shear walls are spliced into a whole through the lengthened high-strength bolts, and the connecting steel plates are flush with the outer surfaces of the upper and lower shear walls.

The assembled shear wall connection node has the following beneficial effects:

(1) The local reinforced connection node of the assembled shear wall with the damping and shock absorbing effects can enable a limited plastic damage area to be firstly transferred to a connecting steel plate and an inclined shock absorbing device outside the shear wall from the original beam-wall-floor slab connection node through the optimal design of each structural parameter, so that the phenomenon that the assembled shear wall is damaged and exits from working too early at the node is avoided, and the shock-resistant safety redundancy of the assembled shear wall is effectively improved.

(2) The outermost steel plates are connected with the upper and lower shear walls to form a first anti-seismic defense line of the connecting node, so that the effective transmission of the stress of the upper and lower shear walls can be ensured, and the plastic hinge area of the shear walls can be locally reinforced.

(3) L-shaped connecting plates are arranged on two sides of the web plates at the overhanging ends of the upper and lower I-shaped steel, so that the moment of inertia of the vertical section of the connecting node is increased, the lateral force resistance rigidity of the connecting node connecting area is improved, and the purpose of improving the mechanical property of the connecting node is achieved.

(4) By arranging the oblique cushioning devices on two sides of the upper L-shaped connecting plate and the lower L-shaped connecting plate, a certain movable cushioning space can be provided after the upper shear wall and the lower shear wall are greatly deformed, the energy consumption capacity and the ductility of the components are improved, and further shearing damage of the inner bolts is delayed. Meanwhile, the shock absorption device can strengthen the connection effect of the upper shear wall and the lower shear wall, and the stability and the integrity of the components are improved.

(5) The stress path of the connecting node of the utility model is specifically as follows: the novel node has the advantages of clear force transmission path and high reliability, the mechanical property is easy to be ensured, the mechanical correlation assumption of the calculation model and the actual structure is high in conformity, meanwhile, the assembly is convenient, and the stable bearing capacity of the node in the stress process of the shear wall can be ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a three-dimensional structure of the present utility model

FIG. 2 is a schematic diagram of a whole set of devices for connecting nodes according to the present utility model

FIG. 3 is a schematic view of the embedded I-section steel of the present utility model

FIG. 4 is a schematic view of an L-shaped connecting plate according to the present utility model

FIG. 5 is a schematic view of a shock absorbing device according to the present utility model

FIG. 6 is a schematic view of a connecting steel plate according to the present utility model

Description of the drawings: 1-upper prefabricated shear wall; 2-lower prefabricated shear wall; 3-upper I-section steel; 301-embedding a narrow flange on the upper I-shaped steel; 302-overhanging the broadside flange of the upper I-shaped steel; 303-upper I-shaped steel sleeve holes; 304-embedding a sleeve in the upper I-shaped steel; 305-a first via; 306-a second through hole; 307-third through holes; 4-lower I-section steel; 401-embedding a narrow flange on the lower I-shaped steel; 402-overhanging the broadside flange of the lower I-shaped steel; 403-lower I-shaped steel sleeve holes; 404-embedding a sleeve in the lower I-shaped steel; 405-a first via; 406-a second via; 407-third via; a 5-L-shaped connecting plate; 501-ribbed flanges; 502-web; 503-a first via; 504-fourth through holes; 6-high-strength bolts; 7-a lug plate connecting bolt; 8-a damping device; 801-an anti-vibration rod with an ear plate at the end and a screw thread at the tail; 802-telescoping cylinder; 803-connecting block; 804-SMA coil spring; 9-connecting steel plates; 901-a fifth through hole; 902-lengthening high-strength bolts.

Description of the embodiments

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, if the terms "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the application conventionally places in use, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

The present utility model is described in detail below with reference to fig. 1 to 6.

Examples

The utility model provides a take prefabricated assembled shear force wall hybrid connection node of damping shock attenuation, includes upper portion prefabricated shear force wall 1, lower part prefabricated shear force wall 2. The upper I-shaped steel 3 comprises an upper I-shaped steel embedded narrow flange 301, an upper I-shaped steel overhanging wide flange 302, a sleeve hole 303 matched with an extended high-strength bolt 902 and an embedded sleeve 304. Similarly, the lower I-section steel 4 comprises a lower I-section steel embedded narrow edge flange 401, a lower I-section steel overhanging wide edge flange 402, sleeve holes 403 and embedded sleeves 404 matched with the lengthened high-strength bolts 902. The connecting device also comprises an L-shaped connecting plate 5, a high-strength bolt 6 and a lug plate connecting bolt 7. In order to improve the anti-seismic performance of the connecting joint, the shear wall hybrid connecting joint achieves a damping effect under the earthquake action, and a damping device 8 is further arranged at the connecting joint. The damping device 8 is composed of an anti-vibration rod 801 with a lug plate at the end and a screw thread at the tail, a telescopic cylinder 802, a connecting block 803 and an SMA spiral spring 804. In order to compensate the node rigidity loss caused by the opening of the upper and lower I-shaped steel, a connecting steel plate 9 is additionally arranged, and the assembled prefabricated shear wall with strong connecting nodes is formed. The connecting node is used for connecting the upper shear wall 1 and the lower shear wall 2, and the upper shear wall 1 and the lower shear wall 2 are oppositely arranged. The upper part shear wall 1 is internally embedded with the narrow flange 301 and part of the web plate on the upper side of the I-shaped steel 3, three rows of sleeve holes 304 are formed in the embedded web plate in a staggered mode, the embedded sleeve 305 is vertically fixed on the web plate of the embedded section of the I-shaped steel 3 through welding, the length is the thickness of the upper part shear wall 1, the structural form can not only effectively strengthen the binding force between the section steel and concrete, avoid the embedded section steel from being pulled out under the action of an earthquake, but also improve the cooperative working capacity of the embedded section steel and the concrete, namely, transfer the stress between two materials, ensure the section steel and the concrete to work together, and fully exert the tensile property of the section steel and the compression property of the concrete. The upper I-beam overhanging broadside flange 302 and the lower I-beam overhanging broadside flange 402 are arranged oppositely, and the second through holes 306 and 406 and the third through holes 307 and 407 are arranged at equal intervals on the left side and the right side of the broadside flanges 302 and 402 in a staggered manner. Wherein the second through holes 306, 406 are fastened by high strength bolts 6.

As shown in fig. 3 to 4, ribbed flanges 501 of 4L-shaped connecting plates 5 are aligned with the bottoms of the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2 respectively in a front-back left-right manner, and symmetrically arranged on the front-back sides of overhanging webs of the upper I-shaped steel 3 and the lower I-shaped steel 4, first through holes 503 are formed in the webs 502 at equal intervals on the middle line, and the ribbed flanges 501 of the L-shaped connecting plates are provided with fourth through holes 504 and lug plate connecting bolts 7 for installing the damping device 8 in the subsequent steps. The L-shaped connecting plate 5 can effectively strengthen the section moment of inertia of a connecting area, strengthen node rigidity, reduce errors generated in the component installation process, and enable the positioning of the upper shear wall and the lower shear wall to be more accurate. The two L-shaped connecting plates 5 of the upper shear wall 1 are tightly connected into a whole through the high-strength bolts 6 and the upper I-shaped steel 3, and the connection mode of the two L-shaped connecting plates 5 at the lower part is the same as that of the upper part.

As shown in fig. 1-2, a shock absorbing device 8 is arranged in the connecting node area of the upper prefabricated shear wall 1 and the lower prefabricated shear wall 2, the number of the shock absorbing devices is 8, the shock absorbing devices are symmetrically arranged at the outer extending web cavities of the upper and lower I-shaped steel 3 and 4, and the side ends of the shock absorbing rods 801 with lug plates of the shock absorbing devices are fixedly connected with lug plate connecting bolts 7 arranged on the flange 501 with ribs of the L-shaped connecting plate. The same positions of the upper I-beam overhanging broadside flange 302 and the lower I-beam overhanging broadside flange 402 are provided with third through holes 307 and 407 for installing the damping device 8.

In fig. 5, the shock absorbing device 8 is composed of 2 end-to-end ear plate end-to-end threaded shock resistant rods 801, 1 telescopic cylinder 802, 2 connecting blocks 803 and 1 SMA coil spring 804. The concrete assembly process is that the inside of a telescopic cylinder 802 is provided with 2 connecting blocks 803 which are respectively connected with two ends of an SMA spiral spring 804, and the bottoms of the connecting blocks 803 are provided with threaded holes with the same diameter as an anti-seismic rod 801. The threaded side ends of the 2 anti-seismic rods 801 are respectively fixed with an upper connecting block 803 and a lower connecting block 803 with threaded holes at the bottoms through threaded connection. Therefore, the transversely rotatable and vertically stretchable damping device 8 is formed, the function of the damping device can not only strengthen the connection of the upper shear wall and the lower shear wall and improve the overall performance of the component, but also enable the hybrid connection node to have certain self-resetting capability due to the fact that the SMA coil spring can provide larger output force, output displacement and certain superelastic energy consumption effect.

Further, the connection steel plate 9 at the outermost side is provided with a fifth through hole 901, the connection steel plate 9 and the prefabricated shear walls 1 and 2 are spliced into a whole through the lengthened high-strength bolts 902, the connection steel plate is flush with the outer surfaces of the upper shear wall and the lower shear wall, the reserved gaps formed by the I-shaped steel 3 and 4 with the connection steel plate, which are narrow at the upper part and wide at the lower part, are convenient for the arrangement of longitudinal ribs and stirrups in the upper shear wall and the lower shear wall, the stress characteristics of the shear wall cannot be influenced, and the effective transmission of the stress of the connection area of the shear wall is ensured.

Although specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims. The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a take prefabricated assembled shear force wall hybrid connection node of damping, its characterized in that, including upper portion shear force wall (1), lower part shear force wall (2) and set up upper portion I shaped steel (3) and lower part I shaped steel (4) in the wall body is inside respectively, 4L type connecting plates (5) set up respectively at upper and lower I shaped steel stretches out wall body web left and right sides be equipped with damping device (8) on L type connecting plate ribbed flange (501), and two connecting steel plates (9) set up in prefabricated wall body outermost side.

2. The prefabricated shear wall hybrid connection node with damping according to claim 1, wherein the upper portion I-shaped steel (3) is provided with an embedded narrow flange (301) and an overhanging broadside flange (302), the upper portion I-shaped steel overhanging broadside flange (302) is provided with a second through hole (306) and a third through hole (307) in a staggered manner, the embedded web of the I-shaped steel is provided with a sleeve hole (303) and an embedded sleeve (304), and the overhanging web of the I-shaped steel is provided with a first through hole (305).

3. The prefabricated shear wall hybrid connection node with damping according to claim 1, wherein the lower section I-shaped steel (4) is provided with an embedded narrow flange (401) and an overhanging wide flange (402), the lower section I-shaped steel overhanging wide flange (402) is provided with a second through hole (406) and a third through hole (407), the embedded web of the I-shaped steel is provided with a sleeve hole (403) and an embedded sleeve (404), and the overhanging web of the I-shaped steel is provided with a first through hole (405).

4. The prefabricated shear wall hybrid connection node with damping according to claim 1, wherein the L-shaped connection plate (5) is provided with a ribbed flange (501) and a web (502), wherein the ribbed flange (501) is provided with a fourth through hole (504) and a lug plate connection bolt (7), and the web (502) is provided with a first through hole (503).

5. The prefabricated shear wall hybrid connection node with damping according to claim 1, wherein the number of the damping devices (8) is 8, and the damping devices are symmetrically arranged on two sides of the front cavity and the rear cavity of the I-shaped steel overhanging web plate.

6. The prefabricated shear wall hybrid connection node with damping according to claim 5, wherein the damping device (8) is sequentially provided with an earthquake-proof rod (801) with an end head and an ear plate and an end tail with threads, a telescopic cylinder (802), a connection block (803) and an SMA spiral spring (804).

7. The prefabricated assembled shear wall hybrid connection node with damping according to claim 6, wherein the damping device (8) is provided with two shock-resistant rods (801) with threaded ends and lug ends, the side ends of the shock-resistant rods (801) with lugs are connected with lug connection bolts (7) arranged on the ribbed flanges (501) of the L-shaped connecting plates, the side ends and the tails of the shock-resistant rods (801) with threads are fixedly connected with connecting blocks (803) and SMA coil springs (804), and the outer parts of the SMA coil springs (804) are slidably connected with telescopic cylinders (802).

8. The prefabricated shear wall hybrid connection node with damping according to claim 1, wherein the two connection steel plates (9) are provided with a fifth through hole (901) and an elongated high-strength bolt (902) for fixing, and the connection steel plates (9) are flush with the surfaces of the upper shear wall (1) and the lower shear wall (2).