Energy dissipation connection device for assembled shear wall

Abstract

The present invention discloses an energy-absorbing connection device for assembled shear walls, comprising an energy-absorbing connection system and a prestressed system, wherein the energy-absorbing connection system is symmetrically arranged at the bottom corners of both ends of a prefabricated wall panel; the upper end of the energy-absorbing connection system is connected to the upper prefabricated wall panel, and the lower end is connected to the lower prefabricated wall panel; the prestressed system is arranged on the central axis of the prefabricated wall panel, and the upper prefabricated wall panel and the lower prefabricated wall panel are connected as a whole through the prestressed system; the present invention connects the upper and lower prefabricated wall panels as a whole through the energy-absorbing connection system and the prestressed system, and the upper and lower prefabricated wall panels are synergistically swayed and deformed under the action of an earthquake; the prestressed system is arranged on the central axis of the prefabricated wall panel, and the swaying of the wall can be controlled by using the prestress and the deadweight of the wall; the energy-absorbing connection system is arranged at the tension and compression corners of the wall that are subjected to greater force, and the energy-absorbing connection system is used to provide a reliable energy-absorbing connection, thereby avoiding brittle crushing damage at the corners of the wall concrete and expanding the earthquake level range applicable to the structure.

Description

Technical Field

[0001] The invention belongs to the technical field of assembled shear wall structure connection, and in particular relates to an energy dissipation connection device for assembled shear walls. Background Art

[0002] With the vigorous development of prefabricated buildings, prefabricated shear wall structures have attracted widespread attention due to their superior lateral stiffness. However, early prefabricated large-panel structures exposed many problems in their applications, such as poor structural seismic performance, insufficient connection performance, and serious damage to component joints, which seriously restricted the development of prefabricated buildings. To solve the above problems, domestic and foreign scholars have proposed a variety of solutions around connection technology, including traditional wet connection methods such as shear key connection and mortar connection, as well as dry connection methods such as bolt connection, welding connection and prestressed connection. The above dry connection method avoids post-node formwork and is easy to operate, becoming a current research hotspot.

[0003] According to the different energy dissipation mechanisms of the connections, they can be divided into two categories: strong connections and recoverable functional connections. Among them, strong connections are always in the elastic stage under earthquake action, while recoverable functional connections adopt a performance-based design method, artificially designing weak connectors to protect the main structure from damage or only minor damage under earthquake action. Recoverable functional connections usually include two forms: prestressed connections and energy-dissipating connections. Prestressed connections usually arrange prestressed steel bars along the longitudinal direction inside the wall components, and the prestressed pressure and the deadweight of the wall control the swaying deformation of the wall to achieve good self-resetting ability. However, during the swaying process, the concrete at the corners of the wall is subjected to hard collision, which is prone to crushing and spalling problems. In addition, the wall specimens lack an effective energy dissipation mechanism and have poor energy dissipation performance. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention provides an energy-dissipating connection device for assembled shear walls to solve the technical problems in the prior art of prestressed connection of walls, which easily causes the corners of the walls to be crushed and peeled off, and has poor energy dissipation performance.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention provides an energy-absorbing connection device for an assembled shear wall, comprising an energy-absorbing connection system and a prestressed system. The energy-absorbing connection system is symmetrically arranged at the bottom corners of both ends of a prefabricated wall panel; the upper end of the energy-absorbing connection system is connected to the upper prefabricated wall panel, and the lower end is connected to the lower prefabricated wall panel; the prestressed system is arranged on the central axis of the prefabricated wall panel, and the upper prefabricated wall panel and the lower prefabricated wall panel are connected into a whole through the prestressed system.

[0007] Furthermore, the energy-absorbing connection system includes a strong connection member and an energy-absorbing connection member; the upper end of the strong connection member is connected to the upper prefabricated wall panel, and the lower end is flush with the bottom end of the upper prefabricated wall panel; the energy-absorbing connection member is symmetrically arranged on both sides of the strong connection member, the upper end of the energy-absorbing connection member is connected to the strong connection member, and the lower end is connected to the lower prefabricated wall panel; the energy-absorbing connection member adopts a variable friction energy-absorbing connection member.

[0008] Furthermore, the strong connection member includes an upper top plate, a first end plate, a second end plate and an intermediate web plate; the upper top plate is horizontally fixed in the prefabricated wall panel, and the first end plate and the second end plate are vertically and parallelly arranged at two ends below the upper top plate;

[0009] The first end plate is flush with the end of the prefabricated wall panel, and the second end plate is fixedly arranged in the prefabricated wall panel; the middle web plate is arranged between the first end plate and the second end plate, and the middle web plate is parallel to the prefabricated wall panel; the energy-absorbing connecting pieces are symmetrically arranged on both sides of the middle web plate, the upper end of the energy-absorbing connecting piece is fixedly connected to the upper top plate, and the lower end is connected to the lower prefabricated wall panel.

[0010] Furthermore, the energy-absorbing connecting parts include two groups of variable friction plates, fixing bolts and disc springs; the two groups of variable friction plates are symmetrically arranged on both sides of the middle web, the upper ends of the variable friction plates are fixedly connected to the upper top plate, and the lower ends are fixedly connected to the lower prefabricated wall panels; the fixing bolts are horizontally passed through the middle web, and the two groups of variable friction plates are respectively fixed at both ends of the fixing bolts; a disc spring is arranged between the variable friction plate and the end of the fixing bolt, and the disc spring is sleeved on the fixing bolt.

[0011] Furthermore, each set of variable friction plates includes an L-shaped outer friction plate and an L-shaped inner friction plate; the L-shaped outer friction plate, the L-shaped inner friction plate and the middle web plate are arranged parallel to each other, the L-shaped inner friction plate is arranged between the L-shaped outer friction plate and the middle web plate, the upper end of the L-shaped outer friction plate is fixedly connected to the upper top plate, and the lower end of the L-shaped inner friction plate is fixedly connected to the lower prefabricated wall panel;

[0012] The vertical surface of the L-shaped outer friction plate is provided with a variable friction groove, and the vertical surface of the L-shaped inner friction plate is provided with a variable friction protrusion. The variable friction groove of the L-shaped outer friction plate is tightly matched with the variable friction protrusion of the L-shaped inner friction plate; a bolt rod fixing hole is provided at the center of the vertical surface of the L-shaped outer friction plate, and a bolt rod shifting slot hole is provided on the vertical surface of the L-shaped inner friction plate. The long axis of the bolt rod shifting slot hole is vertically arranged, and the fixing bolt is penetrated and arranged in the bolt rod shifting slot hole and the bolt rod fixing hole.

[0013] Furthermore, an inner friction brass plate is arranged between the variable friction plate and the middle web plate, one side of the inner friction brass plate is arranged closely to the variable friction plate, and the other side of the inner friction brass plate is arranged closely to the middle web plate.

[0014] Furthermore, upper anchoring steel bars are provided in the upper prefabricated wall panels, and lower anchoring steel bars are provided in the lower prefabricated wall panels;

[0015] An upper threaded sleeve is arranged above the upper top plate, the lower end of the upper threaded sleeve is fixedly connected to the upper top plate, and the lower end of the upper anchor steel bar is fixedly inserted into the upper threaded sleeve;

[0016] A lower threaded sleeve is arranged at the lower end of the energy-absorbing connector, the upper end of the lower threaded sleeve is fixedly connected to the energy-absorbing connector, and the upper end of the lower anchor steel bar is fixedly inserted into the lower threaded sleeve.

[0017] Furthermore, the first end plate includes two vertical plates, which are arranged vertically in parallel and perpendicular to the prefabricated wall panels; and a plurality of reinforcing ribs are horizontally arranged between the two vertical plates.

[0018] Furthermore, the energy dissipation connection system also includes a guard plate structure, which is fixedly arranged between the strong connection piece and the prefabricated wall panel; the guard plate structure includes a guard plate outer plate, a guard plate end plate, a guard plate inner plate and a connecting bolt;

[0019] The outer plate of the guard plate is arranged vertically and parallel to the inner plate of the guard plate, the outer plate of the guard plate is flush with the outer surface of the prefabricated wall panel, and the inner plate of the guard plate is flush with the inner surface of the prefabricated wall panel; the outer plate of the guard plate or the inner plate of the guard plate adopts an L-shaped plate, one end of the L-shaped plate is fixedly connected to the upper top plate, and the other end is fixedly connected to the second end plate;

[0020] The guard plate end plate is arranged between the guard plate outer plate and the guard plate inner plate, and the guard plate end plate is flush with the end of the prefabricated wall panel; the distributed longitudinal reinforcement in the prefabricated wall extends into the guard plate structure and is fixed to the guard plate outer plate or the guard plate inner plate;

[0021] The connecting bolt is horizontally penetrated in the prefabricated wall panel, one end of the connecting bolt is fixedly connected to the outer side plate of the guard plate, and the other end is fixedly connected to the inner side plate of the guard plate.

[0022] Furthermore, it also includes shear studs, which are symmetrically arranged on both sides of the prestressed system, and the upper ends of the shear studs are connected to the upper prefabricated wall panels, and the lower ends are connected to the lower prefabricated wall panels.

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

[0024] The present invention provides an energy-absorbing connection device for assembled shear walls. The upper and lower prefabricated wall panels are connected into a whole through an energy-absorbing connection system and a prestressed system, and the prefabricated wall panels are swayed and deformed in coordination under the action of an earthquake. The prestressed system is arranged on the central axis of the prefabricated wall panel, and the swaying of the wall can be controlled by utilizing the prestress and the deadweight of the wall, and the device has good self-resetting ability. The energy-absorbing connection system is arranged at the tension and compression corners of the wall where the force is relatively large, and the energy-absorbing connection system is utilized to provide reliable energy-absorbing capacity, absorb a large amount of energy, and realize reliable transmission of the stress of the wall panel, thereby avoiding brittle crushing damage of the concrete at the corners of the wall, expanding the earthquake level range applicable to the structure, protecting the main structure from damage, and having excellent structural performance.

[0025] Furthermore, by arranging strong connectors and energy-absorbing connecting keys in the energy-absorbing connection system, the connection between the energy-absorbing connector and the prefabricated wall panel is achieved through the strong connector; the strong connector provides the main lateral stiffness, ensures the synergistic effect of the various parts of the energy-absorbing connection system, and each plays its superior function to achieve an organic combination of the lateral force resistance, energy absorption capacity and force transmission system of the energy-absorbing connection system; the energy-absorbing connector with variable friction energy dissipation can effectively consume the energy under the action of earthquake, eliminate or reduce the residual deformation of the prefabricated shear wall structure under the action of earthquake, and avoid obvious plastic deformation of the main load-bearing components such as the prefabricated wall panel; the energy-absorbing connection device is embedded in the prefabricated wall panel, does not affect the layout of the wall panel, and maximizes the efficiency of friction energy dissipation.

[0026] Furthermore, the strong connector adopts a structural form of a combination of a top plate, an end plate and a web plate, which provides a large lateral stiffness and can effectively share the lateral shear force of the prestressed system and avoid shear failure of the prestressed system; the web plate provides the overall in-plane lateral stiffness of the energy-absorbing connector, ensuring that the strong connector is always in the elastic stage under the action of an earthquake, thereby achieving multiple reuse.

[0027] Furthermore, two groups of variable friction plates are arranged in the energy-absorbing connector, which are symmetrically arranged on both sides of the web of the strong connector to ensure that the overall force of the energy-absorbing connector is balanced; the two groups of variable friction plates are respectively connected to the upper top plate and the lower prefabricated wall panel to ensure the reliable connection between the energy-absorbing connection system and the upper and lower prefabricated wall panels; the two groups of variable friction plates are connected together by fixing bolts to ensure the stability of the energy dissipation process of the variable friction plates.

[0028] Furthermore, an L-shaped outer friction plate and an L-shaped inner friction plate are combined to form a variable friction plate. By arranging a bolt rod displacement slot in the L-shaped inner friction plate, it is ensured that the L-shaped inner friction plate can slide relative to the L-shaped outer friction plate under the action of force. During the sliding process of the L-shaped inner friction plate relative to the L-shaped outer friction plate, the variable friction protrusion on the L-shaped inner friction plate is in close contact with the variable friction groove on the L-shaped outer friction plate, resulting in an increase in the overlapping displacement of the two, squeezing the external disc spring to produce an energy dissipation capacity that changes with the displacement. When the force decreases, the displacement decreases accordingly, the disc spring recovers its deformation, and the energy dissipation capacity also decreases accordingly. In this way, an organic combination of structural force and energy dissipation is achieved, ensuring that the energy dissipation capacity is automatically adjusted with the structural force, and the energy dissipation capacity is better.

[0029] Furthermore, by setting an inner friction brass plate between the variable friction plate and the middle web, the inner friction brass plate provides a larger friction coefficient, ensuring that the energy-dissipating connector has a reliable energy-dissipating capacity; the setting of the inner friction brass plate increases the static friction of the energy-dissipating connector, ensuring that the variable friction mechanism will not be activated under the action of a small earthquake, but can achieve effective energy dissipation of the structure under the action of a small earthquake. When the L-shaped friction plate is relatively displaced, the inner friction brass plate can also consume part of the energy, thereby cooperating with the variable friction spring to provide a relatively large total energy dissipation.

[0030] Furthermore, a full-length thread is arranged inside the upper and lower threaded sleeves, one end of which is used to connect the top bolt or the bottom bolt of the energy-absorbing connector, and the other end of which is used to connect the upper and lower embedded anchor bars inside the prefabricated wall, thereby ensuring a reliable connection between the energy-absorbing connector and the prefabricated wall, and ensuring the efficient use of the connector's force transmission mechanism, energy absorption mechanism and lateral force resistance mechanism.

[0031] Furthermore, by arranging reinforcing ribs in the first end plate, a larger out-of-plane stiffness is provided, thereby increasing the overall stiffness of the energy-absorbing connection system, enhancing the connection between the various parts of the energy-absorbing connection system, and ensuring the overall working performance of the connection system; the energy-absorbing connection can provide friction energy absorption capacity that changes with the force, thereby enhancing the adaptability and strain capacity of the structural system under earthquake action.

[0032] Furthermore, the guard plate structure in the energy-absorbing connection system is located at the boundary position where the strong connection piece is connected to the prefabricated wall. A groove-shaped corner guard is formed by combining two side plates and an end plate, and is welded together with the strong connection piece to form a whole, which is used for the reliable connection between the energy-absorbing connection system and the prefabricated wall, while avoiding crushing damage at the connection between the prefabricated wall panel and the strong connection piece due to sudden change in stiffness; full-length connecting bolts are arranged inside the guard plate structure to ensure that the guard plate structure is connected to the upper prefabricated wall as a whole; the longitudinal distributed steel bars in the prefabricated wall panel are extended into the guard plate structure and bent toward the inside of the guard plate structure, and the steel bars are welded along the side plates of the guard plate to ensure the reliable transmission of the wall panel stress.

[0033] Furthermore, by symmetrically arranging shear studs on both sides of the prestressed system, the shear studs effectively share the shear force at the bottom of the wall, avoiding shear damage of the prestressed system and causing connection failure, thereby improving the reliability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a front view of an energy dissipation connection device for assembled shear walls according to the present invention;

[0035] Figure 2 It is a side view of an energy dissipation connection device for a prefabricated shear wall according to the present invention;

[0036] Figure 3A top view of an energy dissipation connection device for a prefabricated shear wall according to the present invention;

[0037] Figure 4 It is a schematic diagram of the structure of an external friction plate in an energy dissipation connection device for an assembled shear wall according to the present invention;

[0038] Figure 5 It is a schematic diagram of the structure of an inner friction plate in an energy dissipation connection device for an assembled shear wall according to the present invention;

[0039] Figure 6 It is a schematic diagram of the assembly structure between the energy dissipation connection device and the assembled shear wall according to the present invention;

[0040] Figure 7 This is a schematic diagram of the continuous arrangement of the energy dissipation connection devices described in the present invention in a prefabricated shear wall.

[0041] Among them, 1 energy dissipation connection system, 2 prestressed system, 3 shear studs, 4 upper prefabricated wall panels, 5 lower prefabricated wall panels; 11 strong connectors, 12 energy dissipation connectors, 13 guard plate structure, 14 upper threaded sleeves, 15 lower threaded sleeves, 16 top bolts, 17 bottom bolts, 18 first gaskets, 19 second gaskets; 111 upper top plate, 112 first end plate, 113 second end plate, 114 middle web plate, 115 reinforcing rib plate; 121 L-shaped outer friction plate, 122 L-shaped inner friction plate, 123 inner friction brass plate, 124 fixing bolts, 125 disc springs, 126 fixing nuts; 131 guard plate outer plate, 132 guard plate end plate, 133 guard plate inner plate, 134 connecting studs; 21 anchoring device, 22 prestressed tendons; 41 upper anchoring steel bars, 42 distributed longitudinal bars; 51 lower anchoring steel bars. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] As attached Figure 1-7As shown, the present invention provides an energy-dissipating connection device for assembled shear walls, including an energy-dissipating connection system 1, a prestressed system 2 and shear-resistant studs 3; the energy-dissipating connection system 1 is symmetrically arranged at the bottom corners of both ends of the prefabricated wall panels, the upper end of the energy-dissipating connection system 1 is connected to the upper prefabricated wall panel 4, and the lower end is connected to the lower prefabricated wall panel 5; the prestressed system 2 is arranged on the central axis of the prefabricated wall panel, the prestressed system 2 runs through the upper prefabricated wall panel 4 and the lower prefabricated wall panel 5, and the upper prefabricated wall panel 4 and the lower prefabricated wall panel 5 are connected into a whole through the prestressed system 2; the shear-resistant studs 3 are symmetrically arranged on both sides of the prestressed system 2, the upper end of the shear-resistant studs 3 is connected to the upper prefabricated wall panel 4, and the lower end is connected to the lower prefabricated wall panel 5; in the present invention, the upper and lower prefabricated The wall panels are connected as a whole and sway and deform in coordination under the action of an earthquake; the prestressed system is set on the central axis of the prefabricated wall panels, and the swaying of the wall can be controlled by using the prestress and the deadweight of the wall, and has good self-resetting ability; the energy-absorbing connection system is set at the tension and compression corners of the wall where the force is greater, and the energy-absorbing connection system is used to provide reliable energy absorption capacity, absorb a large amount of energy, and realize reliable transmission of wall panel stress, thereby avoiding brittle crushing damage of concrete at the corners of the wall, expanding the earthquake level range applicable to the structure, protecting the main structure from damage, and having superior structural performance; by symmetrically arranging shear studs on both sides of the prestressed system, the shear studs effectively share the shear force at the bottom of the wall, avoiding shear damage of the prestressed system and resulting in connection failure, thereby improving the reliability of the structure.

[0044] The energy-absorbing connection system 1 comprises a strong connection member 11, an energy-absorbing connection member 12 and a guard plate structure 13. The upper end of the strong connection member 11 is connected to the upper prefabricated wall panel 4, and the lower end is flush with the bottom end of the upper prefabricated wall panel 4; the energy-absorbing connection member 12 is symmetrically arranged on both sides of the strong connection member 11, and the energy-absorbing connection key 12 is symmetrically arranged along the thickness direction of the prefabricated wall panel; the upper end of the energy-absorbing connection member 12 is connected to the strong connection member 11, and the lower end is connected to the lower prefabricated wall panel 5. The energy-absorbing connection member 12 adopts a variable friction energy-absorbing connection member. By adopting the variable friction energy-absorbing connection member, the energy under the action of the earthquake can be consumed, the residual deformation of the assembled shear wall structure under the earthquake can be eliminated or reduced, and the obvious plastic deformation of the main load-bearing components such as the prefabricated wall panels can be avoided.

[0045] The strong connection member 11 includes an upper top plate 111, a first end plate 112, a second end plate 113, an intermediate web 114 and a reinforcing rib 115. The upper top plate 111 is horizontally fixed in the prefabricated wall panel. An upper threaded sleeve 14 is arranged above the upper top plate 111. The lower end of the upper threaded sleeve 14 is welded and fixed to the upper top plate 111. An upper anchoring steel bar 41 is arranged in the upper prefabricated wall panel 4. The upper anchoring steel bar 41 is longitudinally arranged in the upper prefabricated wall panel 4. The lower end of the upper anchoring steel bar 41 is passed through the upper threaded sleeve 14. The upper anchoring steel bar 41 and the upper threaded sleeve 14 are connected by threads. The first end plate 112 and the second end plate 113 are vertically arranged in the upper At the two lower ends of the top plate 111, the first end plate 112 is flush with the end of the prefabricated wall panel, the second end plate 113 is fixedly arranged in the prefabricated wall panel, and the first end plate 112 and the second end plate 113 are arranged in parallel with each other; the middle web 114 is arranged between the first end plate 112 and the second end plate 113, and the middle web 114 is parallel to the prefabricated wall panel; preferably, the first end plate 112 includes two vertical plates parallel to each other, and the vertical plates are perpendicular to the prefabricated wall panel; a number of reinforcing ribs 115 are horizontally arranged between the two vertical plates, and one end of the reinforcing rib 115 is vertically welded and fixed to one of the vertical plates, and the other end is vertically welded and fixed to the other vertical plate.

[0046] The energy dissipation connectors 12 are symmetrically arranged on both sides of the middle web 114 . The upper ends of the energy dissipation connectors 12 are fixedly connected to the upper top plate 111 , and the lower ends are connected to the lower prefabricated wall panels 5 .

[0047] The energy dissipation connector 12 includes two groups of variable friction plates, an inner friction brass plate 123, a fixing bolt 124, a disc spring 125 and a fixing nut 126; the two groups of variable friction plates are symmetrically arranged on both sides of the middle web 114, the upper end of the variable friction plate is fixedly connected to the upper top plate 111, and the lower end is fixedly connected to the lower prefabricated wall panel 5; the fixing bolt 124 is horizontally penetrated on the middle web 114, and a fixing bolt hole is arranged on the middle web 114, and the fixing bolt 124 is penetrated in the fixing bolt hole; the two groups of variable friction plates are respectively fixedly arranged at both ends of the fixing bolt 124, and a fixing nut 126 is arranged at the end of the fixing bolt 124; a disc spring 125 is arranged between the variable friction plate and the fixing nut 126, and the disc spring 125 is sleeved on the fixing bolt 124; an inner friction brass plate 123 is arranged between the variable friction plate and the middle web 114, one side of the inner friction brass plate 123 is closely arranged with the variable friction plate, and the other side is closely arranged with the middle web 114.

[0048] Each group of variable friction plates includes an L-shaped outer friction plate 121 and an L-shaped inner friction plate 122. The L-shaped outer friction plate 121, the L-shaped inner friction plate 122 and the middle web plate 114 are arranged parallel to each other; the upper end of the L-shaped outer friction plate 121 is fixedly connected to the upper top plate 111, and the lower end of the L-shaped inner friction plate 122 is fixedly connected to the lower prefabricated wall panel 5; the L-shaped inner friction plate 122 is arranged between the L-shaped outer friction plate 121 and the inner friction brass plate 123, one side of the L-shaped inner friction plate 122 is in close contact with the L-shaped outer friction plate 121, and the other side is in close contact with the inner friction brass plate 123; the vertical surface of the L-shaped outer friction plate 121 is provided with a variable friction groove, and the vertical surface of the L-shaped inner friction plate 122 is provided with a variable friction protrusion, and the variable friction groove of the L-shaped outer friction plate 121 is closely matched with the variable friction protrusion of the L-shaped inner friction plate 122.

[0049] The L-shaped outer friction plate 121 includes an outer friction plate horizontal section and an outer friction plate vertical section. The outer friction plate horizontal section is fixedly arranged below the upper top plate 111, and the outer friction plate horizontal section and the upper top plate 111 are fixedly connected by a top bolt 16; a top bolt through hole is arranged on the outer friction plate horizontal section, and a through hole is arranged on the upper top plate 111. The through hole on the upper top plate 111 is arranged corresponding to the position of the upper threaded sleeve 14, and the upper end of the top bolt 16 successively penetrates the top bolt through hole and the through hole and then extends into and is fixed in the upper threaded sleeve 14, and the outer friction plate horizontal section, the upper top plate 111 and the threaded sleeve 14 are fixedly connected together by the top bolt 16; the outer friction plate vertical section is vertically arranged below the end of the outer friction plate horizontal section, and the outer friction plate vertical section is fixedly installed on the fixing bolt 124, and a bolt rod fixing hole is arranged on the outer friction plate vertical section, and the fixing bolt 124 penetrates the bolt rod fixing hole; preferably, a first gasket 18 is arranged between the top bolt 16 and the upper top plate 111.

[0050] The L-shaped inner friction plate 122 includes an inner friction plate horizontal section and an inner friction plate vertical section. The inner friction plate horizontal section is flush with the bottom end of the prefabricated wall panel, and the inner friction plate horizontal section is fixedly connected to the lower prefabricated wall panel 5; a lower anchoring steel bar 51 is provided in the lower prefabricated wall panel 5, and the lower anchoring steel bar 51 is longitudinally arranged in the lower prefabricated wall panel 5, and the upper end of the lower anchoring steel bar 51 is fixedly connected to the inner friction plate horizontal section, and a lower threaded sleeve 15 is provided below the inner friction plate horizontal section, and the upper end of the lower threaded sleeve 15 is welded and fixed to the inner friction plate horizontal section; the upper end of the lower anchoring steel bar 51 is passed through the lower threaded sleeve 15, and the lower anchoring steel bar 51 and the lower threaded sleeve 15 are threadedly connected; a bottom bolt through hole is provided on the inner friction plate horizontal section, and the position of the bottom bolt through hole is set corresponding to the position of the lower threaded sleeve 15, and the inner friction plate horizontal section is fixed to the lower prefabricated wall panel 5; The threaded sleeves 15 are fixedly connected by a bottom bolt 17, and the lower end of the bottom bolt 17 passes through the bottom through hole and then extends into and is fixed in the lower threaded sleeve 15; preferably, a second gasket 19 is arranged between the bottom bolt 17 and the horizontal section of the inner friction plate; preferably, the thickness of the first gasket 18 is less than the thickness of the second gasket 19; the vertical section of the inner friction plate is vertically arranged above the end of the horizontal section of the inner friction plate, and the vertical section of the inner friction plate is installed on the fixing bolt 124, and a bolt rod displacement slot is arranged on the vertical section of the inner friction plate, and the fixing bolt 124 passes through the bolt rod displacement slot, and the long axis of the bolt rod displacement slot is arranged vertically. By setting the bolt rod displacement slot, the up and down movement of the L-shaped inner friction plate relative to the L-shaped outer friction plate is ensured; preferably, the bolt rod displacement slot adopts a rounded rectangular hole, and the fixing bolt 124 can move up and down in the rounded rectangular hole.

[0051] The outer friction plate vertical section, the inner friction plate vertical section, the inner friction brass plate 123 and the middle web 114 are arranged parallel to each other, the inner friction vertical section is arranged between the outer friction vertical section and the inner friction brass plate 123, the surface of the outer friction plate vertical section is arranged with a friction groove, the surface of the inner friction plate vertical section is arranged with a friction protrusion, the friction groove of the outer friction plate vertical section is tightly matched with the friction protrusion of the inner friction plate vertical section; preferably, the friction groove or the friction protrusion includes two slope sections and one straight section, and the two slope sections are symmetrically arranged at the upper and lower ends of the straight section.

[0052] The guard plate structure 13 is fixedly arranged on the outside of the strong connection member 11 and is arranged between the strong connection member 11 and the prefabricated wall panel; the guard plate structure 13 includes a guard plate outer plate 131, a guard plate end plate 132, a guard plate inner plate 133 and a connecting bolt 134; the guard plate outer plate 131 and the guard plate inner plate 133 are arranged vertically and parallel, the guard plate outer plate 131 is flush with the outer surface of the prefabricated wall panel, and the guard plate inner plate 133 is flush with the inner surface of the prefabricated wall panel; the guard plate outer plate 131 or the guard plate inner plate 133 adopts an L-shaped plate, one end of the L-shaped plate is connected to the upper top plate 11 1, and the other end is fixedly connected to the end of the second end plate 113; the guard plate end plate 132 is arranged between the guard plate outer plate 131 and the guard plate inner plate 133, and the guard plate end plate 132 is flush with the end of the prefabricated wall panel; the distributed longitudinal reinforcement 42 in the prefabricated wall body extends into the guard plate structure 13, and is fixed to the guard plate outer plate 131 or the guard plate inner plate 133; the connecting bolt 134 is horizontally penetrated in the prefabricated wall panel, one end of the connecting bolt 134 is fixedly connected to the guard plate outer plate 131, and the other end is fixedly connected to the guard plate inner plate 133.

[0053] The prestressed system 2 includes two anchoring devices 21 and prestressed tendons 22. The two anchoring devices 21 are respectively arranged at the upper and lower ends of the prestressed tendons 22. The prestressed tendons 22 are longitudinally arranged on the central axis of the prefabricated wall panel.

[0054] Assembly process and working principle

[0055] The energy dissipation connection device for assembled shear walls described in the present invention specifically comprises the following steps in its assembly process:

[0056] Step 1: Processing and production of prefabricated wall panel steel frame and various connecting parts

[0057] Arrange the steel bars of the prefabricated wall panels according to the structural design requirements and tie up the steel bar skeleton; set end threads at the ends of the upper anchor steel bars and the lower anchor steel bars, and the end threads match the internal threads of the upper threaded sleeve and the lower threaded sleeve respectively, and the end threads are formed in one step; make the upper threaded sleeve, the lower threaded sleeve, the top bolt and the bottom bolt, and the threaded sleeve matches the thread of the bolt; process and make gaskets, wherein the thickness of the first gasket is less than the thickness of the second gasket, and bolt holes are arranged on the upper top plate, the horizontal section of the outer friction plate and the horizontal section of the inner friction plate; prepare disc springs and fixing bolts for connection; make strong connectors, including the upper top plate, the first end plate, the second end plate, the middle web and the reinforcing ribs; make the guard plate structure, including the outer guard plate, the end plate, the inner guard plate and the connecting bolts; make prestressed tendons and anchoring devices.

[0058] Step 2: Assembly of steel bars and energy dissipation connection system

[0059] First, the strong connector, energy-absorbing connector and guard plate structure are assembled by welding, including the welding connection of the various parts of the strong connector, the welding connection of the various parts of the guard plate structure, and the welding of the anchor bolts in the middle of the guard plate structure; then, the guard plate structure as a whole is welded to the strong connector; then, the L-shaped outer friction plate, L-shaped inner friction plate, inner friction brass plate, middle web and disc springs on both sides are tightened and connected by fixing bolts; the horizontal section of the outer friction plate, the upper top plate and the upper threaded sleeve are connected by top bolts, and now the energy-absorbing connection system is assembled; then, the energy-absorbing connection system is connected to the steel bars; first, the upper anchor steel bars are connected to the corresponding threaded sleeves; secondly, the distributed longitudinal bars in the steel skeleton that need to be welded to the guard plate structure are located and processed, and welded to the designed position of the guard plate structure.

[0060] Step 3: Production of standard prefabricated shear wall panels

[0061] For the upper prefabricated wall panels, first assemble the special steel formwork, tie the steel bar skeleton, and then position the energy-dissipating connection system to the designed position of the corner of the wall. The distributed longitudinal reinforcement and anchoring steel bars have been fixed accordingly in step 2, and the steel bar anchoring area is locally reinforced with denser stirrups; place the concrete protective layer pads and put the steel bar skeleton into the corresponding position; after checking that everything is correct, vibrate and pour fine stone concrete, and the energy-dissipating connection system automatically forms a formwork to isolate the flow of surrounding concrete and ensure that no concrete is poured into the energy-dissipating connection system; then rush and smooth it, and perform standard maintenance; when the concrete strength reaches the requirement, remove the formwork to form the upper prefabricated wall panels; the production of the lower prefabricated wall panels is roughly the same as that of the upper prefabricated wall panels, the difference is that the steel bar skeleton can be directly produced and placed in the set position, and only the lower anchoring steel bar needs to be firmly tied to the steel bar skeleton; when the concrete strength of the wall panels reaches 75% of the design value, it can be hoisted and connected.

[0062] Step 4: Determine the hoisting position and method of the prefabricated wall panels

[0063] When setting up temporary supports and connecting the upper and lower prefabricated walls, pass the lower anchor steel bars of the lower prefabricated wall panel through the lower threaded sleeve and tighten the connection; use bottom bolts to connect the bottom pad, the horizontal section of the inner friction plate and the lower threaded sleeve as a whole, ensure that the center of the bolt hole diameters of the lower threaded sleeve, pad and the horizontal section of the inner friction plate coincide, tighten the bottom bolts and fix them with spot welding.

[0064] Step 5: Insert prestressed tendons into the reserved holes of the prefabricated wall panels for tensioning, and use anchoring devices to anchor the tensioned prestressed tendons to the ends of the components. The anchoring devices at the ends of the components transmit the prestressing force of the prestressed tendons to the concrete, causing it to generate precompressive stress.

[0065] The variable friction energy dissipation mechanism of the energy dissipation connection device for assembled shear walls described in the present invention is that when the structural force increases gradually from a small one, when the force of the energy dissipation connection device is less than the static friction of the energy dissipation connection piece, the energy dissipation connection piece relies on static friction to dissipate energy, and the energy dissipation capacity is fixed; when the tensile force on the energy dissipation connection device exceeds the static friction of the energy dissipation connection piece, the remaining components except the L-shaped inner friction plate move upward in coordination under the action of the fixing bolts, and the inner friction brass plate and the L-shaped inner friction plate have sliding friction, thereby realizing partial energy dissipation; the L-shaped inner friction plate and the L-shaped outer friction plate have sliding friction, and the friction protrusion of the L-shaped inner friction plate is in close contact with the friction groove of the L-shaped outer friction plate, resulting in an increase in the overlapping displacement of the two, squeezing the external disc spring to produce an energy dissipation capacity that changes with the displacement; when the force decreases, the displacement decreases accordingly, the disc spring recovers its deformation, and the energy dissipation capacity also decreases accordingly; thereby realizing an organic combination of structural force and energy dissipation, and ensuring that the energy dissipation capacity is automatically adjusted with the structural force.

[0066] The energy dissipation connection device for assembled shear walls described in the present invention is suitable for restorable functional connection of horizontal joints of prefabricated assembled concrete shear wall panel structures; the upper and lower prefabricated wall panels are connected into a whole through an energy dissipation connection system and a prestressed system, and sway and deform in coordination under the action of an earthquake. The energy dissipation connection device includes an energy dissipation connection system and a prestressed system, wherein the prestressed system is located at the central axis of the prefabricated wall panel, prestressed tendons are arranged longitudinally, anchoring devices are arranged at the top and bottom of the assembled shear wall structure to fix the prestressed tendons, and the prestressed system is arranged on the central axis of the prefabricated wall panel, and the prestressed system can use prestress and the deadweight of the wall to control the swaying of the wall, and has good self-resetting ability.

[0067] The energy-absorbing connection system is located at the tensile and compressive corners of the wall body where the force is greater, and includes a strong connector, an energy-absorbing connector and a guard plate structure. An internal threaded sleeve is arranged on the upper part of the strong connector and is connected to the anchor steel bar of the upper prefabricated wall panel. The anchor steel bar is pre-buried in the wall body, and a thread matching the internal threaded sleeve is arranged at the end, which is tightened and fixed. Similarly, an internal threaded sleeve is arranged at the lower part of the energy-absorbing connector and is connected to the anchor steel bar with a thread at the end of the lower prefabricated wall panel. At the same time, the distribution steel bars of the upper prefabricated wall panel extend into the guard plate structure and are fixed to the guard plate structure by welding, so as to ensure that the stress-bearing steel bars of the upper wall are firmly connected to the energy-absorbing connection system, and realize reliable transmission of the wall panel stress. Shear bolts are arranged on the inner side of the wall panel connector to share the shear force at the bottom of the wall and prevent the prestressed tendons from being sheared and damaged, resulting in connection failure.

[0068] The guard plate structure in the energy dissipation connection system is located at the boundary position where the strong connection piece is connected to the prefabricated wall. A groove-shaped corner guard is formed by combining two side plates and an end plate, and is welded together with the strong connection piece to form a whole. It is used for reliable connection between the energy dissipation connection system and the prefabricated wall, and protects the connection between the prefabricated wall panel and the strong connection piece from being crushed due to sudden change in stiffness. The upper and inner extending connectors of the outer plate and the inner plate of the guard plate are 100mm, and the corners are set to be arc-shaped, so as to achieve as much protection area as possible while avoiding stress concentration. Common shear bolts are set inside the guard plate structure to ensure that the guard plate structure is connected to the upper prefabricated wall as a whole. The longitudinal distributed steel bars in the prefabricated wall panel are bent toward the inside of the guard plate structure after extending into the guard plate structure, and the steel bars are welded along the side plates of the guard plate to ensure reliable transmission of the wall panel stress.

[0069] The strong connector includes the upper top plate, two end plates and the middle web. All plates are made of steel and welded to form an integral strong connection box, which provides the main lateral stiffness. A fixing bolt hole is opened in the middle of the middle web to install the fixing bolts in the variable friction connector to ensure the effective operation of the variable friction mechanism of the variable friction connection key. The upper top plate has holes symmetrically on both sides of the middle web, through which the top bolts of the energy-absorbing connector pass. The upper part is connected with a sleeve to realize the anchor connection between the energy-absorbing connector and the prefabricated wall panel. The strong connector is also the core of the connection system. The periphery is connected to the guard plate structure by welding, and the top is connected to the energy-absorbing connector and the upper anchor steel bar by a threaded sleeve, ensuring that the various parts of the connection system work together and play their respective advantages to achieve the organic combination of the connection system's lateral force resistance, energy absorption capacity and force transmission system.

[0070] Energy-absorbing connector, the energy-absorbing connector adopts variable friction energy-absorbing connector, including two L-shaped outer friction plates, two L-shaped inner friction plates, two inner friction brass plates and disc spring bolt connector; matching bolt holes are set at corresponding positions of the outer friction plate and the upper top plate, and the horizontal section of the outer friction plate is fastened to the upper top plate by using top bolts and the first gasket; the L-shaped outer friction plate is provided with a friction groove, and the friction groove includes a concave slope section-straight section-slope section, which is used to form a variable friction mechanism; two bolt rod fixing holes are set in the middle of the vertical section of the inner friction plate for fixing bolts to pass through; bolt holes are set in the horizontal section of the inner friction plate, which cooperate with the bottom bolts and the second gasket to connect with the lower internal threaded sleeve; a rounded rectangular hole is set in the middle of the vertical section of the inner friction plate, which is used to move the connecting system except the vertical section of the inner friction plate upward as a whole to realize the variable friction mechanism; the vertical section of the inner friction plate is also provided with a convex slope section-straight section-slope section of the same size as the L-shaped outer friction plate to form a friction protrusion, and the two are engaged with each other.

[0071] The inner friction brass plate is set on both sides of the middle web. The corresponding position in the middle of the inner friction brass plate also opens a bolt hole for fixing the screw connection. The inner friction brass plate provides a large friction coefficient to ensure that the energy-absorbing connector has reliable energy-absorbing capacity. The disc spring is located on the outside of the vertical section of the outer friction plate, which can achieve compression and tensile deformation. As its displacement changes, the overall energy-absorbing capacity of the energy-absorbing connector also changes, realizing a variable friction energy-absorbing mechanism. The fixing bolt is equipped with a fixing nut to achieve a fastening connection between the vertical section of the outer friction plate, the vertical section of the inner friction plate, the inner friction connection brass plate and the middle web. The variable friction effect is achieved by changing the contours of the inner and outer L-shaped friction plates, and the friction force and energy-absorbing capacity change with the force applied to the structure, which increases the flexibility of the structure in an earthquake and meets the actual force requirements. It is simple and feasible, with stable performance and strong controllability.

[0072] A full-length thread is arranged inside the upper and lower threaded sleeves, one end of which is used to connect the top bolt or the bottom bolt of the energy-absorbing connector, and the other end is used to connect the upper and lower embedded anchor bars inside the prefabricated wall, so as to ensure the reliable connection between the energy-absorbing connector and the prefabricated wall, and further ensure the efficient use of the connector's force transmission mechanism, energy absorption mechanism and lateral force resistance mechanism.

[0073] The energy dissipation connection device described in the present invention is connected by welding, bolting and prestressed connection as a whole. There is no need for post-cast joint templates. All parts and components can be assembled on the construction site. The construction is convenient, green and pollution-free. The variable friction energy dissipation connection key can be replaced if damaged, ensuring that the main structure is not damaged.

[0074] The energy-dissipating connection device for assembled shear walls described in the present invention integrates prestressed connection and energy-dissipating connection, and provides reliable energy-dissipating connection by the variable friction energy-dissipating connection piece while realizing self-resetting of the wall, and the energy-dissipating capacity is controlled by the magnitude of the force, thereby expanding the earthquake level range applicable to the structure, protecting the main structure from damage, and having superior structural performance; the present invention adopts dry connection, which can be directly assembled as a whole on the construction site, and has the advantages of high precision, convenient and fast construction, avoidance of on-site formwork at the connection point, green energy saving, later replaceability, reliable connection, clear force transmission, etc. compared with the traditional wet connection method, and meets the requirements of building The present invention adopts variable friction energy dissipation self-resetting prestressed connection, and the connection piece is processed by the factory, and can be formed by welding or bolt connection technology, and can be directly used for pre-buried installation; the guard plate structure in the energy dissipation connection system can effectively ensure the force transmission mechanism of the wall components, and protect the corner concrete from brittle crushing damage; the internal ribs of the strong connection piece increase the overall stiffness of the connection piece system, enhance the connection between the various parts of the connection system, and ensure the overall working performance of the connection system; the energy dissipation connection piece can provide friction energy dissipation capacity that changes with the force, and enhance the adaptability and strain capacity of the structural system under earthquake action;

[0075] The energy-absorbing connection device described in the present invention is symmetrical about the central axis in the thickness direction of the wall as a whole, and is bolted on both sides of the wall, with uniform force, reliable connection and high bearing capacity; the energy-absorbing connection device is closed at the connection with the prefabricated wall panel, and forms a self-contained template. During the production of the prefabricated wall panel, the pre-embedded processing of the connection parts is convenient and quick; the energy-absorbing connection parts with variable friction energy dissipation are used, which can consume the energy under the action of earthquake, eliminate or reduce the residual deformation of the assembled shear wall structure under the action of earthquake, and avoid obvious plastic deformation of the main force-bearing components such as assembled wall panels; the energy-absorbing connection device described in the present invention is embedded in the prefabricated wall panel, does not affect the layout of the wall panel, and maximizes the efficiency of friction energy dissipation.

[0076] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. An energy dissipation connection device for assembled shear walls, It is characterized in that The invention comprises an energy-dissipating connection system (1) and a prestressing system (2), wherein the energy-dissipating connection system (1) is symmetrically arranged at the bottom corners of both ends of the prefabricated wall panel; the upper end of the energy-dissipating connection system (1) is connected to the upper prefabricated wall panel (4), and the lower end is connected to the lower prefabricated wall panel (5); the prestressing system (2) is arranged on the central axis of the prefabricated wall panel, and the upper prefabricated wall panel (4) and the lower prefabricated wall panel (5) are connected into a whole through the prestressing system (2); The energy dissipation connection system (1) comprises a strong connection member (11) and an energy dissipation connection member (12); the upper end of the strong connection member (11) is connected to the upper prefabricated wall panel (4), and the lower end is flush with the bottom end of the upper prefabricated wall panel (4); the energy dissipation connection member (12) is symmetrically arranged on both sides of the strong connection member (11), the upper end of the energy dissipation connection member (12) is connected to the strong connection member (11), and the lower end is connected to the lower prefabricated wall panel (5); the energy dissipation connection member (12) adopts a variable friction energy dissipation connection member; The strong connection member (11) comprises an upper top plate (111), a first end plate (112), a second end plate (113) and an intermediate web plate (114); the upper top plate (111) is horizontally fixed in the prefabricated wall panel, and the first end plate (112) and the second end plate (113) are vertically arranged in parallel at two ends below the upper top plate (111); The first end plate (112) is flush with the end of the prefabricated wall panel, and the second end plate (113) is fixedly arranged in the prefabricated wall panel; the middle web plate (114) is arranged between the first end plate (112) and the second end plate (113), and the middle web plate (114) is parallel to the prefabricated wall panel; the energy-absorbing connecting piece (12) is symmetrically arranged on both sides of the middle web plate (114), the upper end of the energy-absorbing connecting piece (12) is fixedly connected to the upper top plate (111), and the lower end is connected to the lower prefabricated wall panel (5); The energy dissipation connecting member (12) comprises two groups of variable friction plates, fixing bolts (124) and disc springs (125); the two groups of variable friction plates are symmetrically arranged on both sides of the middle web (114); the upper ends of the variable friction plates are fixedly connected to the upper top plate (111), and the lower ends are fixedly connected to the lower prefabricated wall panels (5); the fixing bolts (124) are horizontally passed through the middle web (114), and the two groups of variable friction plates are respectively fixed to the two ends of the fixing bolts (124); a disc spring (125) is arranged between the variable friction plates and the ends of the fixing bolts (124), and the disc spring (125) is sleeved on the fixing bolts (124); An upper anchoring steel bar (41) is provided in the upper prefabricated wall panel (4), and a lower anchoring steel bar (51) is provided in the lower prefabricated wall panel (5); An upper threaded sleeve (14) is arranged above the upper top plate (111), the lower end of the upper threaded sleeve (14) is fixedly connected to the upper top plate (111), and the lower end of the upper anchoring steel bar (41) is fixedly inserted into the upper threaded sleeve (14); A lower threaded sleeve (15) is provided at the lower end of the energy dissipation connection piece (12), the upper end of the lower threaded sleeve (15) is fixedly connected to the energy dissipation connection piece (12), and the upper end of the lower anchor steel bar (51) is fixedly inserted into the lower threaded sleeve (15).

2. An energy dissipation connection device for a prefabricated shear wall according to claim 1, It is characterized in that Each set of variable friction plates comprises an L-shaped outer friction plate (121) and an L-shaped inner friction plate (122); the L-shaped outer friction plate (121), the L-shaped inner friction plate (122) and the middle web plate (114) are arranged parallel to each other, the L-shaped inner friction plate (122) is arranged between the L-shaped outer friction plate (121) and the middle web plate (114), the upper end of the L-shaped outer friction plate (121) is fixedly connected to the upper top plate (111), and the lower end of the L-shaped inner friction plate (122) is fixedly connected to the lower prefabricated wall panel (5); The vertical surface of the L-shaped outer friction plate (121) is provided with a variable friction groove, and the vertical surface of the L-shaped inner friction plate (122) is provided with a variable friction protrusion, and the variable friction groove of the L-shaped outer friction plate (121) and the variable friction protrusion of the L-shaped inner friction plate (122) are tightly matched; a bolt rod fixing hole is provided at the center of the vertical surface of the L-shaped outer friction plate (121), and a bolt rod displacement slot hole is provided on the vertical surface of the L-shaped inner friction plate (122), the long axis of the bolt rod displacement slot hole is vertically arranged, and a fixing bolt (124) is penetrated and arranged in the bolt rod displacement slot hole and the bolt rod fixing hole.

3. An energy dissipation connection device for assembled shear walls according to claim 1 or 2, It is characterized in that An inner friction brass plate (123) is arranged between the variable friction plate and the middle web plate (114), one side of the inner friction brass plate (123) is arranged in close contact with the variable friction plate, and the other side of the inner friction brass plate (123) is arranged in close contact with the middle web plate (114).

4. An energy dissipation connection device for a prefabricated shear wall according to claim 1, It is characterized in that The first end plate (112) comprises two vertical plates, which are arranged vertically in parallel and perpendicular to the prefabricated wall panels; a plurality of reinforcing ribs (115) are arranged horizontally between the two vertical plates.

5. An energy dissipation connection device for a prefabricated shear wall according to claim 1, It is characterized in that The energy dissipation connection system (1) also includes a guard plate structure (13), which is fixedly arranged between the strong connection member (11) and the prefabricated wall panel; the guard plate structure (13) includes a guard plate outer plate (131), a guard plate end plate (132), a guard plate inner plate (133) and a connection bolt (134); The outer panel (131) and the inner panel (133) of the guard plate are arranged vertically and in parallel, the outer panel (131) of the guard plate is flush with the outer surface of the prefabricated wall panel, and the inner panel (133) of the guard plate is flush with the inner surface of the prefabricated wall panel; the outer panel (131) or the inner panel (133) of the guard plate is an L-shaped plate, one end of the L-shaped plate is fixedly connected to the upper top plate (111), and the other end is fixedly connected to the second end plate (113); The guard plate end plate (132) is arranged between the guard plate outer plate (131) and the guard plate inner plate (133), and the guard plate end plate (132) is flush with the end of the prefabricated wall panel; the distributed longitudinal reinforcement in the prefabricated wall body extends into the guard plate structure (13) and is fixed to the guard plate outer plate (131) or the guard plate inner plate (133); The connecting bolt (134) is horizontally inserted into the prefabricated wall panel, one end of the connecting bolt (134) is fixedly connected to the outer side plate (131) of the guard plate, and the other end is fixedly connected to the inner side plate (133) of the guard plate.

6. An energy dissipation connection device for a prefabricated shear wall according to claim 1, It is characterized in that It also includes shear bolts (3) which are symmetrically arranged on both sides of the prestressed system (2), the upper ends of the shear bolts (3) being connected to the upper prefabricated wall panels (4) and the lower ends being connected to the lower prefabricated wall panels (5).

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