Fabricated building external wall panel flat rotation composite energy dissipation joint and construction method thereof

Abstract

The invention relates to a flat rotation composite energy dissipation node of an external wall panel of a fabricated building and a construction method thereof, and belongs to the technical field of fabricated buildings, the node comprises the prefabricated external wall panel, and the prefabricated external wall panel is provided with a first embedded part and a second embedded part which are arranged in a rectangular shape; the fabricated steel frame beam is connected with the second embedded part through a second connecting piece; the energy dissipation component is connected with the first embedded part and connected with the fabricated steel frame beam through a first connecting piece; comprising a friction plate making contact with the first embedded part and a multi-direction multi-effect energy consumption assembly matched with the friction plate, and transverse and longitudinal elastic energy consumption, sliding friction energy consumption and rotating friction energy consumption are provided. Reliable connection of the prefabricated externally-hung wall panel and the steel frame beam can be achieved, when an earthquake occurs, multi-stage energy dissipation is achieved through sliding friction energy dissipation, spring energy dissipation and rotating friction energy dissipation, the energy dissipation effect is achieved, and therefore the anti-seismic performance and safety of a building under the disaster conditions such as the earthquake are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of prefabricated buildings, and particularly relates to a flat-rotation composite energy-dissipating joint for an external wall panel of a prefabricated building and a construction method thereof. Background Art

[0002] With the acceleration of the building industrialization process, prefabricated buildings have been widely used in high-rise and large-span buildings due to their advantages such as high construction efficiency and resource conservation. However, the connection performance between precast components and the main structure in prefabricated buildings, especially the seismic performance, has always been the focus of the industry. Under the action of disasters such as earthquakes, the connection structure between traditional external wall panels and steel frame beams often suffers from insufficient rigid connection or energy-dissipating mechanism, resulting in concentrated structural damage, low energy-dissipating efficiency, and even joint failure, seriously affecting the overall safety of the building. In addition, the post-disaster repair of traditional connection structures is difficult, and it is difficult to meet the requirements of rapid replacement and maintenance for the industrialized construction of prefabricated buildings.

[0003] Currently, some energy-dissipating connection devices in the prior art have attempted to improve the seismic performance through friction damping or spring components, but there are still the following problems:

[0004] Insufficient energy-dissipating efficiency: A single energy-dissipating mechanism (such as only sliding friction or spring energy dissipation) is difficult to fully disperse seismic energy, resulting in local stress concentration and easy structural damage;

[0005] High construction complexity: The connection structure has many components and high installation accuracy requirements, making it difficult to meet the needs of rapid construction of prefabricated buildings;

[0006] Difficult maintenance and replacement: The energy-dissipating components are rigidly connected to the main structure, resulting in high post-disaster disassembly and replacement costs and long cycles;

[0007] Insufficient material adaptability: The durability and environmental adaptability of friction materials or spring components are insufficient, and their performance is prone to decay after long-term use. Summary of the Invention

[0008] Aiming at the deficiencies of the prior art, the present invention provides a flat-rotation composite energy-dissipating joint for an external wall panel of a prefabricated building and a construction method thereof, realizing the reliable connection between the precast external wall panel and the steel frame beam. During an earthquake, the coordinated action of each component enables multi-level energy dissipation through sliding friction energy dissipation, spring energy dissipation, and rotational friction energy dissipation, achieving an energy-dissipating effect, thereby improving the seismic performance and safety of the building under disasters such as earthquakes. The present invention can significantly improve the energy-dissipating efficiency of the connection joint, effectively reduce structural damage under seismic action, be easy to replace after a disaster, and at the same time meet the requirements of industrialized construction of prefabricated buildings and improve the installation efficiency.

[0009] A flat-rotation composite energy-dissipating joint for an external wall panel of a prefabricated building includes:

[0010] Prefabricated external wall panel, on which first embedded parts and second embedded parts are arranged in a rectangular layout;

[0011] Prefabricated steel frame beam, connected to the second embedded part through a second connecting piece;

[0012] Energy dissipation component, connected to the first embedded part and connected to the prefabricated steel frame beam through a first connecting piece; including a friction plate in contact with the first embedded part and a multi-direction and multi-effect energy dissipation assembly cooperating with the friction plate, providing horizontal and vertical elastic energy dissipation, sliding friction energy dissipation and rotational friction energy dissipation.

[0013] The first embedded part and the second embedded part include a disc body, on one side of the disc body, a plurality of stud bolts are symmetrically arranged along the center line of the disc, and the stud bolts and half of the disc body are embedded in the prefabricated external wall panel; at the center position of the other side of the disc body, a column part protruding outwards is arranged, and the inside of the column is provided with a hole and internal threads.

[0014] The column part of the second embedded part is higher than the column part of the first embedded part.

[0015] The energy dissipation component includes a first friction plate, a rotating part friction plate and a rotating part. The first friction plate, the rotating part friction plate and the rotating part are sequentially and closely attached to the first embedded part and fixed by bolts; the horizontal direction two-way and two-effect energy dissipation assembly of the multi-direction and multi-effect energy dissipation assembly is connected to the rotating part, and the vertical direction energy dissipation assembly of the multi-direction and multi-effect energy dissipation assembly is connected to the prefabricated steel frame beam through a first connecting piece.

[0016] The first friction plate is bonded and fixed to the first embedded part through silicone sealant; the rotating part friction plate and the rotating part are bonded and fixed through silicone sealant.

[0017] A sliding rod is fixed on the rotating part, and the sliding rod is connected to the horizontal direction two-way and two-effect energy dissipation assembly of the multi-direction and multi-effect energy dissipation assembly. During the rotation of the rotating part, the sliding rod can move horizontally on the horizontal direction two-way and two-effect energy dissipation assembly; the initial direction of the sliding rod of the rotating part is located directly above the whole device.

[0018] The horizontal direction two-way and two-effect energy dissipation assembly includes a horizontally movable horizontal energy dissipation slider, and the sliding rod is connected to the horizontal energy dissipation slider and can move left and right with the horizontal energy dissipation slider; both ends of the horizontal energy dissipation slider are connected to the longitudinal energy dissipation slider of the vertical direction energy dissipation assembly through horizontal springs, and the longitudinal energy dissipation slider can drive the horizontal energy dissipation slider to move longitudinally synchronously; the supporting end of the vertical direction energy dissipation assembly is connected to the prefabricated steel frame beam through a first connecting piece.

[0019] A longitudinal spring is provided at the bottom of the longitudinal energy-dissipating slider. Positioning support plates are fixedly installed at both ends of the longitudinal spring. The positioning support plate at one end is connected to the longitudinal energy-dissipating slider, and the positioning support plate at the other end is connected to one end of the first connecting member. The other end of the first connecting member is connected to the prefabricated steel frame beam;

[0020] The first connecting member is an integrally formed L-shaped member. The horizontal side of the L-shaped member is connected to the prefabricated steel frame beam. The vertical side is a cavity body with a bottom surface. This cavity body is a longitudinal sliding cavity. The positioning support plate is installed on the bottom plate of the longitudinal sliding cavity. The longitudinal energy-dissipating slider can slide vertically in the longitudinal sliding cavity; The contact surface between the longitudinal energy-dissipating slider and the longitudinal sliding cavity has a coating or plating to increase friction;

[0021] The longitudinal sliding cavity includes two symmetrically arranged parts on the left and right, and there is a hollow design in the middle.

[0022] A transverse sliding cavity is opened horizontally on the longitudinal energy-dissipating slider. The transverse energy-dissipating slider is slidably connected in the transverse sliding cavity. A transverse spring is horizontally arranged between the transverse energy-dissipating slider and the inner wall of the transverse sliding cavity; The contact surface between the transverse energy-dissipating slider and the transverse sliding cavity has a coating or plating to increase friction.

[0023] The construction method of the above-mentioned flat-rotation composite energy-dissipating joint for the prefabricated building exterior wall panel is as follows:

[0024] Step 1: Weld the second connecting member to the prefabricated steel frame beam according to the position requirements of the construction drawings;

[0025] Step 2: Hoist the precast exterior wall panel according to the position requirements of the construction drawings, and connect the second embedded part and the second connecting member in cooperation through bolts;

[0026] Step 3: Bond the first friction plate to the first embedded part, bond the rotating part friction plate to the rotating part, and then fixedly connect the first embedded part, the first friction plate, the rotating part friction plate, and the rotating part in sequence through bolts;

[0027] This step can also be carried out on the ground before the wall panel is hoisted;

[0028] Step 4: Weld the first connecting member to the position on the prefabricated steel frame beam corresponding to the second connecting member up and down;

[0029] Step 5: Slide the vertical direction energy-dissipating component together with the horizontal direction double-effect energy-dissipating component thereon into the longitudinal sliding cavity along the reserved hole above the first connecting member;

[0030] Step 6: Adjust the sliding rod to the position directly above the rotating part, and adjust the horizontal two-way and double-effect energy dissipation components and the vertical energy dissipation components to ensure that the positions of the lateral energy dissipation slider and the sliding rod match. Fix the sliding rod and the lateral energy dissipation slider together with nuts.

[0031] With the above technical solutions, the invention of this application has at least the following beneficial effects:

[0032] 1. Multi-mechanism collaborative energy dissipation significantly improves seismic performance

[0033] Through the synergistic effect of sliding friction, spring energy dissipation and rotational friction, multi-stage dispersion and efficient dissipation of seismic energy are achieved. The design of the energy dissipation components including friction plates and elastic structures can cope with seismic forces in different directions simultaneously, avoid local stress concentration, greatly reduce the risk of structural damage, and improve the overall safety of the building.

[0034] 2. Modular design adapts to industrialized construction and improves installation efficiency

[0035] The energy dissipation components and connectors can adopt the factory integrated prefabrication mode, and only standardized assembly is required on site, which improves the construction efficiency. The L-shaped design and the hollow area structure design of the first connector simplify the construction process, reduce the requirement for installation accuracy, and meet the rapid construction needs of prefabricated buildings.

[0036] 3. Convenient post-disaster maintenance and reduced replacement costs

[0037] The energy dissipation components including friction plates and springs can be replaced. The friction plate is bonded with silicone sealant, and the silicone sealant ensures the weather resistance of the connection part and adapts to the long-term outdoor environment; when replacement is needed, it can be disassembled and replaced by heating at high temperature; the nickel-titanium alloy spring has a shape memory effect and can return to its original state through temperature treatment after the earthquake, without the need to disassemble the overall structure, significantly shortening the repair cycle and reducing the maintenance cost.

[0038] 4. Optimization of material properties to enhance durability and adaptability

[0039] The friction plate is made of graphene-reinforced composite material, which has high friction coefficient, wear resistance and high temperature resistance; the contact surface between the sliding cavity and the slider is coated with nickel, chromium or other friction coatings to optimize the friction performance and extend the service life.

[0040] 5. The structure is flexible and reliable, taking into account both load-bearing and energy dissipation requirements

[0041] The first connector is mainly for energy dissipation, and the second connector focuses on load-bearing, and the two work together. The rotating part allows free rotation within a certain displacement range through the cooperation design of the friction plate and the embedded part, avoiding brittle failure caused by rigid connection, and at the same time ensuring the structural reset ability after the earthquake.

[0042] 6. Improvement in economy and sustainability

[0043] By reducing the degree of seismic damage and simplifying the maintenance process, the service life of the building can be extended; at the same time, prefabricated components are used, which can reduce material waste and shorten the construction time, meeting the concept of green buildings. Description of the Drawings

[0044] Figure 1 It is a schematic diagram of the overall structure of the flat-rotating composite energy-dissipating joint of the prefabricated exterior wall panel of the present invention;

[0045] Figure 2 It is a schematic diagram of the prefabricated exterior wall panel in the present invention;

[0046] Figure 3 It is a schematic diagram of the structure of the first embedded part in the present invention;

[0047] Figure 4 It is a schematic diagram of the structure of the second embedded part in the present invention;

[0048] Figure 5 It is a schematic diagram of the structure of the first connecting part in the present invention;

[0049] Figure 6 It is a schematic diagram of the structure of the second connecting part in the present invention;

[0050] Figure 7 It is a schematic diagram of the structure of the part of the second embedded part in the present invention;

[0051] Figure 8 It is an exploded view of the part of the second embedded part in the present invention;

[0052] Figure 9 It is a schematic diagram of the structure of the part of the first embedded part in the present invention;

[0053] Figure 10 It is a schematic diagram of the connection structure between the first embedded part and the energy-dissipating component in the present invention;

[0054] Figure 11 It is a schematic diagram of the connection structure between the first embedded part and the energy-dissipating component in the present invention (the first connecting part is not shown);

[0055] Figure 12 It is an exploded view of the connection part between the first embedded part and the rotating part in the present invention;

[0056] Figure 13 It is a schematic diagram of the connection structure between the multi-directional and multi-effect energy-dissipating component and the first connecting part in the present invention;

[0057] Figure 14 It is an exploded view of the connection structure between the multi-directional and multi-effect energy-dissipating component and the first connecting part in the present invention;

[0058] Figure 15 Structural schematic diagram of the longitudinal spring part in the present invention;

[0059] Figure 16 Structural schematic diagram of the connection between the lateral energy-dissipating slider and the longitudinal energy-dissipating slider in the present invention;

[0060] Figure 17 Structural schematic diagram of the lateral spring part in the present invention;

[0061] Wherein:

[0062] 1 - Prefabricated exterior wall panel, 11 - First embedded part, 12 - Second embedded part, 2 - Prefabricated steel frame beam, 3 - Energy-dissipating component, 31 - First friction plate, 32 - Rotating part friction plate, 33 - Rotating part, 331 - Sliding rod, 34 - Multi-directional and multi-effect energy-dissipating assembly, 341 - Horizontal-direction two-way and two-effect energy-dissipating assembly, 3411 - Lateral energy-dissipating slider, 3412 - Lateral spring, 3413 - Positioning plate, 342 - Vertical-direction energy-dissipating assembly, 3421 - Longitudinal energy-dissipating slider, 3422 - Longitudinal spring, 3423 - Positioning support plate, 3424 - Lateral sliding cavity, 36 - Third bolt, 37 - Third gasket, 38 - Second bolt, 39 - Second gasket, 4 - First connecting piece, 41 - Longitudinal sliding cavity, 5 - Second connecting piece, 51 - First bolt, 52 - First gasket. Specific implementation manners

[0063] For better explaining the present invention for easy understanding, the technical solutions and effects of the present invention will be described in detail below in conjunction with the drawings through specific implementation manners.

[0064] Combined with Figures 1-17 As shown, the present invention provides a flat-rotating composite energy-dissipating joint for a prefabricated building exterior wall panel, including a prefabricated exterior wall panel 1, a prefabricated steel frame beam 2, and an energy-dissipating component 3 connected between the prefabricated exterior wall panel 1 and the prefabricated steel frame beam 2.

[0065] The prefabricated exterior wall panel 1 is embedded with a first embedded part 11 and a second embedded part 12, and two upper first embedded parts 11 and two lower second embedded parts 12 form a rectangular space. The second embedded part 12 is connected to the prefabricated steel frame beam 2 through a second connecting piece 5, and the second connecting piece 5 is an L-shaped member. In this embodiment, the second embedded part 12 is connected to the prefabricated steel frame beam 2 through an angle steel. The second embedded part 12 is provided with internal threads, a bolt connection hole is opened on one side edge of the angle steel, and a first bolt 51 passes through a first gasket 52 and the bolt connection hole and is in threaded connection with the internal threads of the second embedded part 12, and the other side edge of the angle steel is welded to the steel frame beam. The first embedded part 11 is connected to the prefabricated steel frame beam 2 through the energy-dissipating component 3.

[0066] In this embodiment, both the first embedded part 11 and the second embedded part 12 are integrally formed structures. The main structure of the first embedded part 11 is a disc body. On one side of the disc body, four stud bolts are symmetrically arranged along the center line of the disc, and the height of the stud bolts is 60 mm. At the center position on the other side of the disc body, there is a column part protruding outward. The inside of the column is provided with an opening and internal threads. Similarly, the main structure of the second embedded part 12 is a disc body. On one side of the disc body, four stud bolts are symmetrically arranged along the center line of the disc. At the center position on the other side of the disc body, there is a column part protruding outward. The inside of the column is provided with an opening and internal threads, and the column part is matched with the bolt connection hole on the second connecting piece 5. The column part of the second embedded part 12 is higher than the column part of the first embedded part 11. Both the first embedded part 11 and the second embedded part 12 adopt the prefabrication mode in the factory. Half of the disc body is embedded in the precast external wall panel 1, and the other half of the disc body connected to the column part extends outside the precast external wall panel 1, which is convenient for regular inspection and replacement of the friction plate. During installation, first connect the connection part of the second embedded part 12, and then connect the connection part of the first embedded part 11.

[0067] The energy-consuming component 3 includes a first friction plate 31, a rotating member friction plate 32, a rotating member 33, and a multi-direction and multi-effect energy-consuming assembly 34. The first friction plate 31, the rotating member friction plate 32, and the rotating member 33 are sequentially and closely attached to the first embedded part 11 and fixed by a second bolt 38. The second bolt 38 sequentially passes through a second gasket 39, the rotating member 33, the rotating member friction plate 32, and the first friction plate 31, and its end is connected to the first embedded part 11. The first friction plate 31 is bonded and fixed to the first embedded part 11 by silicone sealant to prevent dislocation during vibration; the rotating member friction plate 32 and the rotating member 33 are bonded and fixed by silicone sealant. The multi-direction and multi-effect energy-consuming assembly 34 includes a horizontal-direction two-way and two-effect energy-consuming assembly 341 and a vertical-direction energy-consuming assembly 342 which are connected to each other. The horizontal-direction two-way and two-effect energy-consuming assembly 341 is connected to the rotating member 33, and the vertical-direction energy-consuming assembly 342 is connected to the prefabricated steel frame beam 2 through a first connecting member 4. In this embodiment, a sliding rod 331 is fixed on the rotating member 33, and the initial direction of the sliding rod 331 is directly above the whole device; the sliding rod 331 is connected to the horizontal-direction two-way and two-effect energy-consuming assembly 341 of the multi-direction and multi-effect energy-consuming assembly 34, and during the rotation of the rotating member 33, the sliding rod 331 can horizontally move on the horizontal-direction two-way and two-effect energy-consuming assembly 341. Specifically, the horizontal-direction two-way and two-effect energy-consuming assembly 341 includes a horizontally movable horizontal energy-consuming slider 3411, and the sliding rod 331 is connected to the horizontal energy-consuming slider 3411 and can move left and right with the horizontal energy-consuming slider 3411 to consume energy. Both ends of the horizontal energy-consuming slider 3411 are connected to a longitudinal energy-consuming slider 3421 of the vertical-direction energy-consuming assembly 342 through horizontal springs 3412. The horizontal springs 3412 at both ends of the horizontal energy-consuming slider 3411 provide spring energy consumption during the horizontal movement of the horizontal energy-consuming slider 3411, and the friction between the horizontal energy-consuming slider 3411 and the longitudinal energy-consuming slider 3421 provides sliding friction energy consumption during the horizontal movement of the horizontal energy-consuming slider 3411, so as to achieve two-way, that is, left and right horizontal and double-effect energy consumption of the spring and sliding friction. At the same time, the longitudinal energy-consuming slider 3421 can drive the horizontal energy-consuming slider 3411 to synchronously move longitudinally to consume energy, and the supporting end of the vertical-direction energy-consuming assembly 342 is connected to the prefabricated steel frame beam 2 through a first connecting member 4.

[0068] The first friction plate 31 and the rotating member friction plate 32 are circular and are provided with circular through holes in the middle for cooperating with the column part of the first embedded part 11.

[0069] Furthermore, both the first friction plate 31 and the rotating member friction plate 32 are made of graphene-reinforced materials, specifically made of graphene and epoxy resin matrix, with high friction coefficient, good wear resistance and high temperature resistance. At the same time, silicone sealant is selected for bonding. The silicone sealant has excellent weather resistance and is not eroded when exposed to the outdoor environment for a long time. Moreover, it has good bonding performance and can form a reliable sealed connection. When it is necessary to regularly check the first friction plate 31 and the rotating member friction plate 32 after assembly, if replacement is needed, it can be carried out by heating at high temperature to make the silicone sealant lose its effect, which is convenient for replacing the first friction plate 31 or the rotating member friction plate 32. For the convenience of construction, all the energy-consuming components 3 are prefabricated in the factory or assembled on the ground.

[0070] In this embodiment, the vertical energy-consuming component 342 of the multi-direction and multi-effect energy-consuming component 34 includes a longitudinal energy-consuming slider 3421 capable of longitudinal movement. The two ends of the longitudinal energy-consuming slider 3421 are wide and the middle is narrow. A longitudinal spring 3422 is arranged at the bottom of the longitudinal energy-consuming slider 3421. In the normal state, the telescopic direction of the longitudinal spring 3422 is the vertical direction; positioning support plates 3423 are fixedly installed at both ends of the longitudinal spring 3422. One positioning support plate 3423 is connected to the longitudinal energy-consuming slider 3421, and the other positioning support plate 3423 is connected to one end of the first connecting member 4. The other end of the first connecting member 4 is connected to the prefabricated steel frame beam 2. Further, the first connecting member 4 is an integrally formed L-shaped member. The horizontal side of the L-shaped member is connected to the prefabricated steel frame beam 2, effectively improving the joint stiffness and bearing capacity; the vertical side is a cavity body with a bottom surface, and this cavity body is a longitudinal sliding cavity 41. The positioning support plate 3423 is installed on the bottom plate of the longitudinal sliding cavity 41, and the longitudinal energy-consuming slider 3421 can slide vertically in the longitudinal sliding cavity 41. Coating or plating layers are provided on the contact surfaces between the longitudinal sliding cavity 41 and the positioning support plate 3423 and the longitudinal energy-consuming slider 3421 to increase the friction force and provide sliding friction energy consumption during the movement of the longitudinal energy-consuming slider 3421. For the convenience of construction, the longitudinal sliding cavity 41 includes two symmetrically arranged parts on the left and right, and the middle part is a hollow design. The cross-sectional size of the positioning support plate 3423 is the same as the size of the cavity body. The top surface of the positioning support plate 3423 connected to the longitudinal energy-consuming slider 3421 is coated with an adhesive and bonded and fixed to the longitudinal energy-consuming slider 3421, and the bottom surface of the positioning support plate 3423 connected to the longitudinal sliding cavity 41 is coated with an adhesive and bonded and fixed to the longitudinal sliding cavity 41 to improve the stability of the longitudinal energy-consuming slider 3421 sliding in the longitudinal sliding cavity 41. At the same time, a transverse sliding cavity 3424 is transversely opened on the longitudinal energy-consuming slider 3421, and the inner surface of the transverse sliding cavity 3424 has a coating or plating layer. The transverse energy-consuming slider 3411 is slidably connected in the transverse sliding cavity 3424, and a transverse spring 3412 is transversely arranged between the transverse energy-consuming slider 3411 and the inner wall of the transverse sliding cavity 3424. Further, one end of the transverse spring 3412 is fixed on a positioning plate 3413, and the positioning plate 3413 abuts in the transverse sliding cavity 3424. Both ends of the transverse spring 3412 are welded and fixed to the positioning plate 3413 and the transverse energy-consuming slider 3411 respectively. The end of the transverse energy-consuming slider 3411 is limited and fixed by a third bolt 36. The third bolt 36 passes through a third gasket 37 and is threadedly connected to the internal thread of the sliding rod 331 on the rotating member 33. The multi-direction and multi-effect energy-consuming component 34 can also adopt the factory prefabrication mode to reduce the difficulty and improve the efficiency during on-site construction.

[0071] Since the second embedded part 12 is installed first and then the first embedded part 11 during installation, it is inevitable that there will be deviations during the construction process of installing the second embedded part 12. These deviations can be corrected by the elastic effect of the multi-directional and multi-effect energy dissipation component 34 when installing the first embedded part 11. That is, when installing the multi-directional and multi-effect energy dissipation component 34, the positions of the other components are adjusted and corrected through the lateral spring 3412 and the longitudinal spring 3422, effectively improving the installation accuracy and construction speed.

[0072] The bolt connection of the sliding rod 331 on the rotating part 33 and the bolt connection of the column part of the first embedded part 11 make the disassembly convenient, facilitating the replacement of the rotating part 33, the first friction plate 31, and the rotating part friction plate 32.

[0073] Furthermore, the lateral energy dissipation slider 3411 includes two relatively arranged slider bodies. The opposite sides of the two slider bodies are semi-circular, and after being spliced relatively, they form a circular through-hole, which is matched with the sliding rod 331 of the rotating part 33. The slider body is provided with an integrally formed convex block that is matched with the lateral sliding cavity 3424, and the contact surface between the slider body and the lateral sliding cavity 3424 has a coating or plating layer that can improve the friction force.

[0074] The coating is a friction coating, and aluminum oxide, zirconia, or tungstate coatings can be selected. The plating layer is nickel plating or chrome plating on the contact surface, thereby increasing the friction force on the metal surface and generating sliding friction energy dissipation, which can be specifically adjusted according to project requirements.

[0075] The materials of the lateral spring 3412 and the longitudinal spring 3422 are selected as nickel-titanium alloy. Nickel-titanium alloy has a one-way memory effect. Within the elastic range, it can withstand much larger deformations than ordinary metals without permanent deformation and can return to its original shape after unloading. When deformed by external forces, it can be restored to its original shape by a certain temperature, facilitating the replacement of the connectors after an earthquake.

[0076] When an earthquake occurs, the vibration of the node causes the sliding rod 331 on the rotating member 33 to drive the horizontal double-effect energy dissipation component 341 in the multi-direction and multi-effect energy dissipation component 34 to slide in the lateral sliding cavity 3424. Since the contact surface between the slider body and the lateral sliding cavity 3424 has a coating or plating to increase the friction force, sliding friction energy dissipation will occur; while the lateral energy dissipation slider 3411 slides, it compresses the lateral spring 3412, triggering spring energy dissipation. When the displacement of the lateral energy dissipation slider 3411 reaches a certain degree, the rotating member 33 rotates, causing friction between the first friction plate 31 bonded to the upper embedded part 11 and the rotating member friction plate 32 bonded to the rotating member 33; at the same time, the rotating member 33 drives the longitudinal energy dissipation slider 3421 of the multi-direction and multi-effect energy dissipation component 34 to slide, compressing the longitudinal spring 3422, and at the same time triggering the rotational friction energy dissipation between the first friction plate 31 and the rotating member friction plate 32 and the spring energy dissipation of the longitudinally compressed spring 3422.

[0077] The construction method of the above-mentioned flat-rotating composite energy dissipation node for the exterior wall panel of an assembled building is as follows:

[0078] Step 1: Weld the second connecting piece 5 to the designated position required by the construction drawing of the assembled steel frame beam 2.

[0079] Step 2: Hoist the precast exterior wall panel 1 to the designated position required by the construction drawing, and cooperate and connect the second embedded part 12 and the second connecting piece 5 through the first bolt 51 and the first gasket 52.

[0080] Step 3: Bond the first friction plate 31 to the first embedded part 11, bond the rotating member friction plate 32 to the rotating member 33, and then fixedly connect the first embedded part 11, the first friction plate 31, the rotating member friction plate 32, and the rotating member 33 in sequence through the second bolt 38 and the second gasket 39.

[0081] It should be noted that this step can also be carried out on the ground before the precast exterior wall panel 1 is hoisted.

[0082] Step 4: Weld the first connecting piece 4 to the position on the assembled steel frame beam 2 corresponding to the second connecting piece 5 up and down.

[0083] Step 5: Apply adhesive to the positioning support plates 3423 at both ends of the longitudinal spring 3422 of the vertical energy dissipation component 342, and then slide the vertical energy dissipation component 342 together with the horizontal double-effect energy dissipation component 341 thereon into the longitudinal sliding cavity 41 through the reserved hole above the first connecting piece 4.

[0084] Step 6: After the above work preparation is completed, adjust the sliding rod 331 directly above the rotating member 33, and adjust the horizontal two-way double-effect energy dissipation component 341 and the vertical energy dissipation component 342 to ensure that the position of the horizontal energy dissipation slider 3411 coincides with that of the sliding rod 331. Fix the sliding rod 331 and the horizontal energy dissipation slider 3411 in cooperation through the third nut 36 and the third gasket 37.

[0085] When an earthquake occurs, a part of the first embedded part 11 first triggers the horizontal two-way double-effect energy dissipation component 341, triggering sliding friction energy dissipation and spring energy dissipation. When the displacement reaches the limit position, the rotating member 33 rotates to trigger the vertical energy dissipation component 342, and at the same time, rotational friction energy dissipation and spring energy dissipation are triggered. The connecting part of the second embedded part 12 mainly plays a load-bearing role and can also rotate when the vibration reaches a certain level.

[0086] The present invention can not only improve the energy dissipation efficiency and reduce earthquake damage, but also simplify the construction process and realize a connection structure for rapid replacement to meet the dual requirements of prefabricated buildings for safety and industrialized construction.

Claims

1. A flat-rotating composite energy-dissipating joint for an external wall panel of a prefabricated building, characterized in that Including: Prefabricated external wall panel, on which first embedded parts and second embedded parts are arranged in a rectangular layout; Prefabricated steel frame beam, connected to the second embedded part through a second connecting piece; Energy dissipation component, connected to the first embedded part and connected to the prefabricated steel frame beam through a first connecting piece; including a friction plate in contact with the first embedded part and a multi-directional and multi-effect energy dissipation component cooperating with the friction plate, providing horizontal and longitudinal elastic energy dissipation, sliding friction energy dissipation and rotational friction energy dissipation.

2. The flat-rotation composite energy-dissipating joint of the external wall panel of the prefabricated building according to claim 1, wherein: The first embedded part and the second embedded part include a disc body, on one side of the disc body, a plurality of stud bolts are symmetrically arranged along the center line of the disc, and the stud bolts and half of the disc body are embedded in the prefabricated external wall panel; at the center position of the other side of the disc body, a column part protruding outward is provided, and the inside of the column is provided with a hole and internal threads.

3. The rotational and translational composite energy-dissipating joint of the prefabricated building external wall panel according to claim 2, wherein: The column part of the second embedded part is higher than the column part of the first embedded part.

4. The flat-rotation composite energy-dissipating joint of the prefabricated building external wall panel according to claim 1, characterized in that: The energy dissipation component includes a first friction plate, a rotating part friction plate and a rotating part. The first friction plate, the rotating part friction plate and the rotating part are sequentially and closely attached to the first embedded part and fixed by bolts; the horizontal two-way and two-effect energy dissipation component of the multi-directional and multi-effect energy dissipation component is connected to the rotating part, and the vertical energy dissipation component of the multi-directional and multi-effect energy dissipation component is connected to the prefabricated steel frame beam through a first connecting piece.

5. A flat-rotating composite energy-dissipating joint for an external wall panel of a prefabricated building according to claim 4, characterized in that: The first friction plate is bonded and fixed to the first embedded part through silicone sealant; the rotating part friction plate and the rotating part are bonded and fixed through silicone sealant.

6. The flat-rotation composite energy-dissipating joint of the prefabricated building external wall panel according to claim 4, wherein: A sliding rod is fixed on the rotating part, and the sliding rod is connected to the horizontal two-way and two-effect energy dissipation component of the multi-directional and multi-effect energy dissipation component. During the rotation of the rotating part, the sliding rod can move horizontally on the horizontal two-way and two-effect energy dissipation component; the initial direction of the sliding rod of the rotating part is located directly above the entire device.

7. The flat-rotation composite energy-dissipating joint of the prefabricated building external wall panel according to claim 6, characterized in that: The horizontal two-way and two-effect energy dissipation component includes a horizontally movable horizontal energy dissipation slider. The sliding rod is connected to the horizontal energy dissipation slider and can move left and right with the horizontal energy dissipation slider; both ends of the horizontal energy dissipation slider are connected to the longitudinal energy dissipation slider of the vertical energy dissipation component through horizontal springs, and the longitudinal energy dissipation slider can drive the horizontal energy dissipation slider to move longitudinally synchronously; the supporting end of the vertical energy dissipation component is connected to the prefabricated steel frame beam through a first connecting piece.

8. A flat-rotational composite energy-dissipating joint for an external wall panel of a prefabricated building according to claim 7, characterized in that: A longitudinal spring is arranged at the bottom of the longitudinal energy dissipation slider, and positioning support plates are fixedly installed at both ends of the longitudinal spring. One positioning support plate is connected to the longitudinal energy dissipation slider, and the other positioning support plate is connected to one end of the first connecting piece. The other end of the first connecting piece is connected to the prefabricated steel frame beam; The first connecting piece is an integrally formed L-shaped member. The horizontal side of the L-shaped member is connected to the prefabricated steel frame beam, and the vertical side is a cavity body with a bottom surface. This cavity body is a longitudinal sliding cavity. The positioning support plate is installed on the bottom plate of the longitudinal sliding cavity, and the longitudinal energy dissipation slider can slide vertically in the longitudinal sliding cavity; the contact surface between the longitudinal energy dissipation slider and the longitudinal sliding cavity has a coating or plating for increasing friction; The longitudinal sliding cavity includes two symmetrically arranged parts on the left and right, and there is a hollow design in the middle.

9. The assembled building external wall panel horizontal rotation composite energy dissipation joint according to claim 8, characterized in that: A transverse sliding cavity is horizontally formed in the longitudinal energy-dissipating slider, and the transverse energy-dissipating slider is slidably connected in the transverse sliding cavity. A transverse spring is horizontally arranged between the transverse energy-dissipating slider and the inner wall of the transverse sliding cavity. The contact surface between the transverse energy-dissipating slider and the transverse sliding cavity is provided with a coating or plating for increasing friction.

10. The construction method of a flat-rotating composite energy-dissipating joint for an external wall panel of a prefabricated building according to any one of claims 1-9, characterized in that, Specifically as follows: Step 1: Weld the second connecting piece to the prefabricated steel frame beam according to the position requirements of the construction drawings. Step 2: Hoist the precast exterior wall panel according to the position requirements of the construction drawings, and connect the second embedded part and the second connecting piece in a matching manner through bolts. Step 3: Bond the first friction plate to the first embedded part, bond the rotating part friction plate to the rotating part, and then fixedly connect the first embedded part, the first friction plate, the rotating part friction plate, and the rotating part in sequence through bolts. This step may be carried out on the ground before the wall panel is hoisted. Step 4: Weld the first connecting piece to the position on the prefabricated steel frame beam corresponding to the second connecting piece vertically. Step 5: Slide the vertical energy-dissipating component together with the horizontal double-effect energy-dissipating component thereon into the longitudinal sliding cavity along the reserved hole above the first connecting piece. Step 6: Adjust the sliding rod to be directly above the rotating part, and adjust the horizontal double-effect energy-dissipating component and the vertical energy-dissipating component to ensure the coincidence of the positions of the transverse energy-dissipating slider and the sliding rod, and fixedly connect the sliding rod and the transverse energy-dissipating slider through nuts.

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