Layered fabricated concrete coupled shear wall

Abstract

The invention belongs to the technical field of concrete building assembly, and particularly relates to a layered assembly type concrete coupled shear wall which comprises a prefabricated shear wall, a prefabricated coupling beam and a connecting piece used for connecting the prefabricated shear wall and the prefabricated coupling beam, and the connecting piece comprises a first embedded part embedded in the upper surface of the prefabricated shear wall and a second embedded part embedded in the lower surface of the prefabricated coupling beam. Two first shells arranged in the length direction of the first embedded part are arranged on the upper surface of the first embedded part, a plurality of horizontally-arranged limiting blocks and buffer blocks are elastically arranged on the two opposite side surfaces of the two first shells in a penetrating mode, a second shell is arranged on the lower surface of the second embedded part, and the second shell protrudes out of the lower surface of the second embedded part. A plurality of limiting grooves matched with the limiting grooves are formed in the surfaces of the two sides of the second shell, the surfaces of the two sides of the second shell are connected with connecting blocks connected with the buffer blocks in a clamped mode, and by means of the technical scheme, the problem that in an existing fabricated building, after a cross beam is connected with a shear wall, the overall structure is poor in anti-seismic performance can be effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete building assembly, and in particular relates to a layered assembled concrete joint shear wall. Background Art

[0002] Prefabricated buildings, commonly known as prefabricated buildings or modular buildings, refer to a construction method in which building components are prefabricated in a factory and then transported to the construction site for assembly. This construction method has the advantages of fast construction speed, stable building quality and reduced construction costs. It is currently widely used in the construction field. Among them, the shear wall and the beam can also be accelerated by prefabricated structures and connectors. For example, a Chinese patent discloses a new type of assembled shear wall structure (patent publication number: CN104652654B), which consists of prefabricated shear walls, prefabricated beams, prefabricated floor slabs, prefabricated window wall panels and cast-in-place nodes. The exterior walls are basically fully prefabricated, and the interior walls can be prefabricated or cast-in-place. The window wall panels use prefabricated window wall panels, and the bottom of the wall panels are pre-buried with steel bar connection sleeves, which are connected to the reserved steel bars on the prefabricated connecting beams with grouting sleeves. All prefabricated components are in the same shape, which is convenient for component production and transportation and simple for on-site installation.

[0003] Although the above technical scheme provides a prefabricated assembly structure and method between a shear wall and a beam, it does not take seismic performance into consideration. In the construction industry, in order to minimize damage to buildings during an earthquake, it is usually necessary to set a buffer zone at the connection to allow a certain degree of relative displacement to reduce damage to the connection, following the principle of not collapsing in a large earthquake, being repairable in a medium earthquake, and being elastic in a small earthquake. Therefore, in order to improve the seismic performance between the beam and the shear wall in the prefabricated assembly, the present invention provides a layered assembled concrete joint shear wall. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a layered assembled concrete joint shear wall to solve the problem of poor seismic performance of the overall structure after the beams and shear walls are connected in the current assembled buildings.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A layered assembled concrete joint shear wall comprises a prefabricated shear wall, a prefabricated connecting beam and a connecting piece for connecting the two, wherein the connecting piece comprises a first embedded piece embedded in the upper surface of the prefabricated shear wall and a second embedded piece embedded in the lower surface of the prefabricated connecting beam, wherein the upper surface of the first embedded piece is provided with two first shells arranged along its length direction, the two first shells both protrude from the upper surface of the first embedded piece and are symmetrically arranged about the first embedded piece, and the two opposite side surfaces of the two first shells are elastically penetrated with a plurality of horizontally arranged limit blocks and buffer blocks, and the second A second shell is provided on the lower surface of the embedded part, and the second shell protrudes from the lower surface of the second embedded part, and a plurality of limit grooves corresponding to and cooperating with the limit blocks are opened on both side surfaces of the second shell, and connecting blocks that are mutually engaged with the buffer blocks are connected to both side surfaces of the second shell, wherein, when the prefabricated connecting beam cooperates with the prefabricated shear wall, the second shell is located between the two first shells, and the second shell and the two first shells are spaced and filled with flexible buffer material, at which time each limit block cooperates with the corresponding limit groove, and the connecting block and the buffer block are mutually engaged.

[0007] Furthermore, a connecting groove is provided on the upper surface of the buffer block, and the connecting groove is gradually inclined from top to bottom toward the direction close to the second shell. The connecting block protrudes from the second shell, and the connecting block is gradually inclined from top to bottom toward the direction away from the first shell. When the prefabricated connecting beam cooperates with the prefabricated shear wall, the connecting block moves vertically downward and cooperates with the connecting groove.

[0008] Furthermore, two vertically arranged first friction plates are connected between the two first shells, and the two first friction plates are symmetrically arranged about the axis in the length direction of the first shells. The second shells are provided with second friction plates matching with the first friction plates on both side surfaces away from the first shells. When the prefabricated connecting beam matches with the prefabricated shear wall, the two first friction plates both cover and abut against the corresponding second friction plate surfaces.

[0009] Furthermore, a plurality of first protrusions are provided on a surface of one side of the first friction plate close to the second friction plate, and a plurality of second protrusions are provided on a surface of one side of the second friction plate close to the first friction plate, and a horizontal cross-section of each of the first protrusions and the second protrusions is an isosceles trapezoid, and a plurality of the first protrusions and the second protrusions are evenly spaced and staggered along the length direction of the first embedded part, wherein the spacing between any two adjacent first protrusions is greater than the maximum horizontal length of the second protrusions, and the inclined surfaces on both sides of each first protrusion are covered with flexible buffering materials, and when the prefabricated connecting beam is matched with the prefabricated shear wall, the horizontal surface of each first protrusion is in contact with the corresponding surface of the second friction plate, and the horizontal surface of each second protrusion is in contact with the corresponding surface of the first friction plate, and the inclined surfaces on both sides of the adjacent first protrusions and the second protrusions jointly extrude the corresponding flexible buffering materials.

[0010] Furthermore, a plurality of horizontally arranged tension screws are commonly connected between the two first friction plates and the second housing, each of the tension screws is arranged along the width direction of the first embedded part, and the plurality of tension screws are evenly spaced along the length direction of the first embedded part, and both ends of each tension screw extend out of the first friction plate and are threadedly connected with a nut

[0011] Furthermore, a positioning member for auxiliary connection is provided between the first embedded member and the second embedded member, and the positioning member includes a positioning tube vertically arranged in the two first shells and a positioning column spaced apart on the lower surface of the second shell, the diameter of the positioning column is smaller than the diameter of the positioning tube, and when the prefabricated connecting beam cooperates with the prefabricated shear wall, the positioning column is inserted into the corresponding positioning tube.

[0012] The beneficial effects of the present invention are:

[0013] 1. The present invention can quickly assemble the prefabricated shear wall and the prefabricated connecting beam by arranging a connecting piece between the prefabricated shear wall and the prefabricated connecting beam. At the same time, the present invention can absorb and reduce the damage of the prefabricated shear wall and the prefabricated connecting beam caused by earthquakes through the cooperation of components such as the buffer block, the connecting block, the flexible buffer material, the first friction plate and the second friction plate, thereby having an excellent shock-absorbing and energy-dissipating effect.

[0014] 2. Under normal circumstances, the coordination of the connectors and the positioning parts between the prefabricated connecting beams and the prefabricated shear walls can ensure the integrity and bearing capacity of the prefabricated connecting beams and the prefabricated shear walls. When an earthquake occurs, the positioning cylinder absorbs the seismic energy and produces plastic deformation to form a first-order yield. Then, the flexible buffer material and the spring assist and further reduce the impact force of the earthquake. Subsequently, through the coordination of the first friction plate, the second friction plate, the first protruding block and the second protruding block, part of the energy of the earthquake is converted into heat generated by friction. Multiple components work together and consume a large amount of seismic energy to achieve the effect of energy dissipation and shock reduction.

[0015] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0017] Figure 1 This is a schematic diagram of the assembly of the prefabricated shear wall and the prefabricated coupling beam of the present invention;

[0018] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0019] Figure 3 The first embedded part structure of the present invention is schematically shown in FIG. Figure 1 ;

[0020] Figure 4 The first embedded part structure of the present invention is schematically shown in FIG. Figure 2 ;

[0021] Figure 5 It is a schematic diagram of the second embedded part structure in the present invention;

[0022] Figure 6 This is a schematic diagram of the assembly of the prefabricated coupling beam and the prefabricated shear wall in the present invention;

[0023] Figure 7 for Figure 6 Sectional view at the middle BB;

[0024] Figure 8 for Figure 7 The enlarged schematic diagram at C in the middle;

[0025] Fig. 9 for Figure 7 Sectional view at DD in the middle.

[0026] The following are marked in the accompanying drawings:

[0027] 1 prefabricated shear wall, 2 prefabricated connecting beam, 3 connecting part, 301 first embedded part, 302 second embedded part, 4 first shell, 5 limit block, 6 buffer block, 7 second shell, 8 limit groove, 9 connecting block, 10 connecting groove, 11 first friction plate, 12 second friction plate, 13 first protruding block, 14 second protruding block, 15 flexible buffer material, 16 tension screw, 17 positioning part, 1701 positioning cylinder, 1702 positioning column. DETAILED DESCRIPTION

[0028] like Figures 1 to 9 As shown,

[0029] A layered assembled concrete joint shear wall comprises two prefabricated shear walls 1, a prefabricated connecting beam 2 and a connecting member 3 for connecting the prefabricated shear wall 1 and the prefabricated connecting beam 2, wherein the connecting member 3 comprises a first embedded member 301 embedded in the upper surface of the prefabricated shear wall 1 and a second embedded member 302 embedded in the lower surface of the prefabricated connecting beam 2, wherein the first embedded member 301 and the second embedded member 302 are both made of steel structural materials, and the first embedded member 301 and the second embedded member 302 are mutually bound with the steel bars in the prefabricated shear wall 1 and the prefabricated connecting beam 2 during manufacture, and an integral structure is formed after pouring, wherein the upper surface of the first embedded member 301 is welded and fixed with two first shells 4 arranged along its length direction, the two first shells 4 are both protruding from the upper surface of the first embedded member 301 and are symmetrically arranged about the first embedded member 301, and the two opposite side surfaces of the two first shells 4 are elastically penetrated with a plurality of horizontal A limit block 5 and a buffer block 6 (a spring is provided between the buffer block 6, the limit block 5 and the first shell 4), the limit blocks 5 are all cylindrical, and one end of each limit block 5 away from the first shell 4 is chamfered, the lower surface of the second embedded part 302 is welded and fixed with a second shell 7, the second shell 7 protrudes from the lower surface of the second embedded part 302, and the two side surfaces of the second shell 7 are provided with a plurality of limit grooves 8 corresponding to the limit blocks 5 and cooperating with each other, and the two side surfaces of the second shell 7 are welded and fixed with connecting blocks 9 that are mutually engaged with the buffer blocks 6, wherein, when the prefabricated connecting beam 2 is matched with the prefabricated shear wall 1, the second shell 7 is located between the two first shells 4, and the second shell 7 and the two first shells 4 are spaced and filled with flexible buffer material 15, at this time, each limit block 5 is mutually engaged with the corresponding limit groove 8, and the connecting block 9 is mutually engaged with the buffer block 6;

[0030] Among them, concrete is also poured in the first shell 4 and the second shell 7 to improve the overall strength; the cylindrical limit block 5 is inserted into the steel pipe, and the steel pipe is transversely arranged in the first shell 4 and welded and fixed (combined with Figure 3 shown).

[0031] As shown in the figure, after the prefabricated shear wall 1 and the prefabricated connecting beam 2 are manufactured in the factory, they are transported to the construction site and started to be built. First, the two prefabricated shear walls 1 are placed vertically at intervals and fixed to the designated positions, and then the prefabricated connecting beam 2 is hoisted by a crane. During the hoisting process of the prefabricated connecting beam 2, it is ensured that the second shell 7 is vertically downward and placed between the corresponding two first shells 4. During the placement, the side surface of the second shell 7 will abut each limit block 5, so that the limit block 5 is pushed into the first shell 4. When the first embedded part 301 abuts the surface of the second embedded part 302, and each limit block 5 extends out and cooperates with the corresponding limit groove 8, at this time, the first shell 4 is placed in the designated position, and the prefabricated connecting beam 2 and the prefabricated shear wall 1 are connected to each other through the limit groove 8 and the limit block 5. Since there is a gap between the second shell 7 and the side surface of the adjacent first shell 4, the second shell 7 can only move in a small range along the axial direction of the limit block 5, and the connecting block 9 is also mutually engaged with the corresponding buffer block 6 at the same time, and when After the second shell 7 is matched with the first shell 4, the flexible buffer material 15 is filled in the gap between the second shell 7 and the first shell 4 to complete the installation of the prefabricated connecting beam 2 and the prefabricated shear wall 1. The multiple degrees of freedom of the first shell 4 are restricted by the cooperation of multiple limit blocks 5 and limit grooves 8, and the second shell 7 is only allowed to move laterally along the axial direction of the limit block 5. When an earthquake occurs, when one of the prefabricated shear walls 1 transmits shear force through the prefabricated connecting beam 2, the flexible buffer material 15 filled between the first shell 4 and the second shell 7 is first compressed and absorbs the impact force through deformation to reduce the transmitted shear force. Secondly, due to the compression and deformation of the flexible buffer material 15, the corresponding first shell 4 will move a certain distance along an axial direction of the limit block 5, and the connecting blocks 9 on both sides of the second shell 7 will drive the buffer block 6 to move, so that one of the buffer blocks 6 squeezes the corresponding spring, and the other buffer block 6 drives and stretches the corresponding spring, and the shear force transmitted by the prefabricated connecting beam 2 is further absorbed by the two springs, thereby improving the effect of energy dissipation and shock absorption.

[0032] In this embodiment, a connecting groove 10 is provided on the upper surface of the buffer block 6, and the connecting groove 10 is gradually inclined from top to bottom toward the direction close to the second shell 7. The connecting block 9 protrudes from the second shell 7, and the connecting block 9 is gradually inclined from top to bottom toward the direction away from the first shell 4. When the prefabricated connecting beam 2 cooperates with the prefabricated shear wall 1, the connecting block 9 moves vertically downward and cooperates with the connecting groove 10.

[0033] Combination Figure 5 and Fig. 9As shown, when the prefabricated connecting beam 2 is vertically downward and cooperates with the prefabricated shear wall 1, the lower end of the connecting block 9 is first inserted into the corresponding connecting groove 10. When the connecting block 9 gradually moves downward, the side surface of the connecting block 9 will abut the inner wall of the connecting groove 10 and drive the buffer block 6 to move toward the second shell 7. At this time, the buffer block 6 will stretch the corresponding spring. When the prefabricated connecting beam 2 and the prefabricated shear wall 1 are assembled, the connecting blocks 9 on both sides of the second shell 7 will drive the buffer blocks 6 that cooperate with it to move towards each other and displace a certain distance, so that the springs on both sides of the second shell 7 are stretched and two pulling forces in opposite directions are applied to the second shell 7. While improving the connection stability between the prefabricated connecting beam 2 and the prefabricated shear wall 1, it can also further improve the shear resistance and the buffering effect of earthquakes.

[0034] In this embodiment, two vertically arranged first friction plates 11 are detachably connected between the two first shells 4 by bolts, and the two first friction plates 11 are symmetrically arranged about the axis in the length direction of the first shell 4. The second shell 7 is provided with second friction plates 12 matching with the first friction plates 11 on both side surfaces away from the first shell 4, and the second friction plates 12 are detachably connected to the second shell 7 by bolts. When the prefabricated connecting beam 2 is matched with the prefabricated shear wall 1, the two first friction plates 11 both cover and abut the corresponding surfaces of the second friction plates 12.

[0035] Combination Figure 1 and Figure 2 As shown, the second friction plate 12 is pre-fixed on the surface of the second shell 7 by bolts. After the prefabricated connecting beam 2 and the prefabricated shear wall 1 are assembled, the first friction plate 11 is fixed between the two first shells 4 by bolts, and it is ensured that the adjacent two side surfaces of the first friction plate 11 and the second friction plate 12 abut against each other. When an earthquake occurs, the prefabricated connecting beam 2 transmits shear force and drives the second shell 7 to move, and the second shell 7 will also drive the second friction plate 12 to move in the horizontal plane. Since the first friction plate 11 and the second friction plate 12 abut against each other, the second friction plate 12 will rub against the first friction plate 11 while moving, and convert part of the energy generated by the earthquake into heat energy generated by the friction between the first friction plate 11 and the second friction plate 12, further consuming the shear force transmitted by the prefabricated connecting beam 2, and further improving the shear resistance and the buffering effect of earthquake.

[0036] In this embodiment, a plurality of first protruding blocks 13 are provided on a side surface of the first friction plate 11 close to the second friction plate 12, and a plurality of second protruding blocks 14 are provided on a side surface of the second friction plate 12 close to the first friction plate 11. The horizontal cross-section of each of the first protruding blocks 13 and the second protruding blocks 14 is an isosceles trapezoid. The plurality of first protruding blocks 13 and the second protruding blocks 14 are evenly spaced and staggered along the length direction of the first embedded part 301, wherein the spacing between any two adjacent first protruding blocks 13 is greater than the maximum horizontal length of the second protruding blocks 14, and the inclined surfaces on both sides of each first protruding block 13 are covered with flexible buffer materials 15. When the prefabricated connecting beam 2 is matched with the prefabricated shear wall 1, the horizontal surface of each first protruding block 13 abuts against the corresponding surface of the second friction plate 12, and the horizontal surface of each second protruding block 14 abuts against the corresponding surface of the first friction plate 11, and the inclined surfaces on both sides of the adjacent first protruding blocks 13 and the second protruding blocks 14 jointly squeeze the corresponding flexible buffer materials 15.

[0037] To protect and facilitate disassembly of the first friction plate 11, a connecting plate is welded and fixed to the surface of the first friction plate 11 away from the second shell 7, and connecting ears are provided on both sides of the connecting plate, which are detachably connected to the two first shells 4 by bolts.

[0038] Combination Figure 7 and Figure 8 As shown, when the prefabricated shear wall 1 and the prefabricated connecting beam 2 are assembled, the first protruding block 13 and the second protruding block 14 are intersected and spaced apart. When an earthquake occurs, the prefabricated connecting beam 2 transmits the shear force, and the second shell 7 moves axially along the limit block 5. The flexible buffer material 15 between the first protruding block 13 and the second protruding block 14 is first squeezed and plastically deformed to absorb part of the vibration generated by the earthquake. At the same time, the horizontal surface of the first protruding block 13 rubs against the surface of the second friction plate 12, and the horizontal surface of the second protruding block 14 rubs against the surface of the first friction plate 11 to further absorb the energy of the earthquake. The horizontal cross-sections of the protruding blocks 14 are all isosceles trapezoids. Therefore, the inclined edges on both sides of any two adjacent first protruding blocks 13 will limit the displacement of the corresponding second protruding blocks 14, which can ensure the friction area of ​​the first protruding blocks 13 and the second protruding blocks 14 while further improving the supporting effect of the first protruding blocks 13 on the second protruding blocks 14. At the same time, if the earthquake is large and the shear force transmitted by the prefabricated connecting beam 2 is also large, the inclined two side surfaces of the first protruding block 13 and the second protruding block 14 will produce plastic deformation after abutting against each other, further absorbing and consuming the energy transmitted by the earthquake, thereby achieving the effect of energy dissipation and shock reduction for large earthquakes.

[0039] Among them, since the first friction plate 11 and the first shell 4 are detachably connected by bolts, and the second friction plate 12 and the second shell 7 are also detachably connected by bolts, when the first protrusion block 13 and the second protrusion block 14 absorb energy and produce elastic deformation, the first friction plate 11 or the second friction plate 12 can be removed and replaced to ensure the shock-absorbing effect between the prefabricated shear wall 1 and the prefabricated connecting beam 2.

[0040] In this embodiment, three horizontally arranged tension screws 16 are commonly connected between the two first friction plates 11 and the second shell 7, each of the tension screws 16 is arranged along the width direction of the first embedded part 301, and the three tension screws 16 are evenly spaced along the length direction of the first embedded part 301, and both ends of each tension screw 16 extend out of the first friction plate 11 and are threadedly connected with a nut. Of course, through holes are provided on the surfaces of the second shell 7, the first friction plate 11 and the second friction plate 12 for the tension screws 16 to pass through, and the through holes provided on the surface of the first friction plate 11 are horizontally arranged strip-shaped through holes, which can ensure that the second shell 7 can move axially along the limit block 5.

[0041] When the prefabricated shear wall 1 and the prefabricated connecting beam 2 are matched, three tension screws 16 are passed through the corresponding first friction plate 11, the second friction plate 12 and the second shell 7 and the nuts at both ends are tightened, which can increase the contact area between the first friction plate 11 and the second friction plate 12 and reduce the generation of gaps.

[0042] In this embodiment, a positioning member 17 for auxiliary connection is provided between the first embedded member 301 and the second embedded member 302, and the positioning member 17 includes a positioning tube 1701 vertically arranged in the two first shells 4 and a positioning column 1702 spaced apart on the lower surface of the second shell 7, the diameter of the positioning column 1702 is smaller than the diameter of the positioning tube 1701, and when the prefabricated connecting beam 2 is matched with the prefabricated shear wall 1, the positioning column 1702 is inserted into the corresponding positioning tube 1701.

[0043] It is convenient to position the prefabricated connecting beam 2 and the prefabricated shear wall 1 during assembly, and when the second shell 7 moves axially along the limit block 5, the positioning column 1702 will also abut the positioning cylinder 1701 while moving. When the positioning cylinder 1701 is subjected to force and plastically deformed, it yields before the buffer block 6, the first friction plate 11, the second friction plate 12 and other components are subjected to force, so that the stability between the prefabricated connecting beam 2 and the prefabricated shear wall 1 can be ensured when a small earthquake occurs.

[0044] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A layered assembled concrete joint shear wall, comprising a prefabricated shear wall (1), a prefabricated coupling beam (2) and a connector (3) for connecting the two, characterized in that: The connecting member (3) comprises a first embedded member (301) embedded in the upper surface of the prefabricated shear wall (1) and a second embedded member (302) embedded in the lower surface of the prefabricated connecting beam (2); the upper surface of the first embedded member (301) is provided with two first shells (4) arranged along its length direction; the two first shells (4) are both protruding from the upper surface of the first embedded member (301) and are symmetrically arranged with respect to the first embedded member (301); and the two opposite side surfaces of the two first shells (4) are both elastically provided with a plurality of horizontally arranged limit blocks (5) and buffer blocks (6); the lower surface of the second embedded member (302) is provided with a second shell (7); the second shell (7 ) protrudes from the lower surface of the second embedded part (302), and the two side surfaces of the second shell (7) are provided with a plurality of limit grooves (8) corresponding to and cooperating with the limit blocks (5), and the two side surfaces of the second shell (7) are connected with connecting blocks (9) that are mutually clamped with the buffer blocks (6), wherein, when the prefabricated connecting beam (2) is matched with the prefabricated shear wall (1), the second shell (7) is located between the two first shells (4), and the second shell (7) and the two first shells (4) are spaced and filled with flexible buffer material (15), at which time each limit block (5) is mutually matched with the corresponding limit groove (8), and the connecting block (9) and the buffer block (6) are mutually clamped.

2. A layered assembled concrete joint shear wall according to claim 1, characterized in that: The upper surface of the buffer block (6) is provided with a connection groove (10), and the connection groove (10) is gradually inclined from top to bottom in a direction close to the second shell (7). The connection block (9) protrudes from the second shell (7), and the connection block (9) is gradually inclined from top to bottom in a direction away from the first shell (4). When the prefabricated connecting beam (2) is matched with the prefabricated shear wall (1), the connection block (9) moves vertically downward and matches with the connection groove (10).

3. A layered assembled concrete joint shear wall according to claim 2, characterized in that: Two vertically arranged first friction plates (11) are connected between the two first shells (4), and the two first friction plates (11) are symmetrically arranged about the axis of the length direction of the first shell (4). The second shell (7) is provided with second friction plates (12) matching with the first friction plates (11) on both side surfaces away from the first shell (4). When the prefabricated connecting beam (2) matches with the prefabricated shear wall (1), the two first friction plates (11) both cover and abut against the corresponding surfaces of the second friction plates (12).

4. The layered assembled concrete joint shear wall according to claim 3 is characterized in that: A plurality of first protrusions (13) are provided on a surface of one side of the first friction plate (11) close to the second friction plate (12), and a plurality of second protrusions (14) are provided on a surface of one side of the second friction plate (12) close to the first friction plate (11), wherein the horizontal cross-section of each of the first protrusions (13) and the second protrusions (14) is an isosceles trapezoid, and the plurality of first protrusions (13) and the second protrusions (14) are evenly spaced and staggered along the length direction of the first embedded part (301), wherein the spacing between any two adjacent first protrusions (13) is greater than the spacing between any two adjacent first protrusions (13). The maximum horizontal length of the two protruding blocks (14) is 100 mm, and the inclined surfaces on both sides of each first protruding block (13) are covered with flexible buffer materials (15). When the prefabricated connecting beam (2) is matched with the prefabricated shear wall (1), the horizontal surface of each first protruding block (13) abuts against the surface of the corresponding second friction plate (12), and the horizontal surface of each second protruding block (14) abuts against the surface of the corresponding first friction plate (11). The inclined surfaces on both sides of the adjacent first protruding blocks (13) and second protruding blocks (14) jointly squeeze the corresponding flexible buffer materials (15).

5. The layered assembled concrete joint shear wall according to claim 4 is characterized in that: A plurality of horizontally arranged tension screws (16) are commonly connected between the two first friction plates (11) and the second shell (7), each of the tension screws (16) is arranged along the width direction of the first embedded part (301), and the plurality of tension screws (16) are evenly spaced along the length direction of the first embedded part (301), and both ends of each tension screw (16) extend out of the first friction plate (11) and are threadedly connected with a nut.

6. The layered assembled concrete joint shear wall according to claim 5, characterized in that: A positioning member (17) for auxiliary connection is provided between the first embedded member (301) and the second embedded member (302), the positioning member (17) comprising a positioning tube (1701) vertically arranged in the two first shells (4) and a positioning column (1702) arranged at intervals on the lower surface of the second shell (7), the diameter of the positioning column (1702) being smaller than the diameter of the positioning tube (1701), and when the prefabricated connecting beam (2) is matched with the prefabricated shear wall (1), the positioning column (1702) is inserted into the corresponding positioning tube (1701).

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