Fabricated disc type rotating lead viscoelastic damper with replaceable beam-column joints

Abstract

The utility model discloses an assembly type disc rotating lead viscoelastic damper with a replaceable beam-column joint, which is characterized by comprising an assembly type energy consumption unit piece and an assembly type displacement amplification unit piece, the assembly type energy dissipation unit pieces are installed at beam-column joints and used for absorbing and dissipating earthquake energy. Assembly type displacement amplification units are installed on the two sides of the assembly type energy dissipation unit piece and used for amplifying displacement of the structure and dissipating energy. Earthquake energy is dissipated through deformation of the damper, damage is concentrated on the damper to protect a main body structure from being damaged, and the structure recovers the using function as soon as possible by maintaining or replacing the damaged damper after an earthquake.

Description

Technical Field

[0001] This utility model belongs to the field of seismic resistance and vibration reduction technology in civil engineering, specifically relating to a prefabricated disc-type rotating lead viscoelastic damper with replaceable beam-column joints. Background Technology

[0002] Reinforced concrete frame structures are lightweight, with loads supported by beams and columns, and partition walls used for division and maintenance. They can flexibly adapt to building layouts, making them widely used in multi-story and high-rise buildings. In frame structures, beam-column joints act as force hubs, playing a crucial role in transmitting and distributing internal forces and ensuring overall integrity. Damage to these beam-column joints can cause varying degrees of structural damage, and in severe cases, even lead to the collapse of the entire structure. Therefore, reinforcing beam-column joints and implementing energy dissipation and vibration reduction measures at these joints are key and challenging aspects of solving seismic resistance problems in structural design.

[0003] Installing energy-dissipating components or dampers in certain parts of a structure is a passive control method to dissipate seismic energy. Currently, the most widely used dampers in building structures include metallic dampers, friction dampers, viscous dampers, and viscoelastic dampers. Among them, viscoelastic dampers can be used for structural seismic and wind-induced vibration control, especially showing significant vibration reduction effects on large-span and large-deformation structures. Lead viscoelastic dampers, based on research findings on viscoelastic materials and the characteristics of lead, are composite energy-dissipating dampers with a displacement-velocity correlation, utilizing two energy dissipation mechanisms simultaneously. Composite energy-dissipating dampers have two or more energy dissipation mechanisms, offering more significant advantages compared to dampers with only one mechanism. Under external energy stimulation, the deformation of the building structure causes deformation of the viscoelastic material and lead core in the damper, thereby providing additional stiffness and damping to the building structure and dissipating most of the energy input from the outside. This effectively reduces the seismic dynamic response of the building structure under external excitation, achieving the purpose of energy dissipation and vibration reduction. However, these composite energy-dissipating dampers have problems such as being unable to be applied to beam-column joints to reduce relative displacement of beam-column rotation and poor energy dissipation effect under small displacement.

[0004] In summary, existing technologies have the problem that beam-column joints in building structures are extremely susceptible to damage under seismic loads, and that frames are prone to damage from "weak nodes". Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a prefabricated disc-type rotating lead viscoelastic damper with replaceable beam-column joints. The damper has good shock absorption effect, is placed at the beam-column joints of the frame structure, and is easy to replace after damage. The deformation of the damper dissipates seismic energy and concentrates the damage on the damper to protect the main structure from damage. After the earthquake, the structure can be restored to its usability as soon as possible by repairing or replacing the damaged damper.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A prefabricated disc-type rotating lead viscoelastic damper with replaceable beam-column joints includes prefabricated energy-dissipating unit components and prefabricated displacement amplification unit components.

[0008] The prefabricated energy-dissipating unit is installed at the beam-column joint to absorb and dissipate seismic energy.

[0009] The assembled energy-dissipating unit is equipped with assembled displacement amplification units on both sides. The assembled displacement amplification units are used to amplify the displacement of the structure and dissipate energy.

[0010] The prefabricated energy-dissipating unit is an engineering vibration damping device that, when installed at beam-column joints, effectively absorbs and dissipates seismic energy, reducing damage to the main structure. This damper can be used for seismic reinforcement of existing buildings, especially old buildings or structures with insufficient seismic resistance, and can also be used in new buildings to achieve the principles of "strong columns, weak beams" and "strong joints, weak components."

[0011] The assembled displacement amplification unit is an additional device used to enhance the performance of the damper. When the beam or column deforms, the displacement is transmitted sequentially through the upper transmission steel arm 1-2 or the lower transmission steel arm 1-1, the upper gear column 2-2 or the lower gear column 2-1, the upper gear 3-2 or the lower gear 3-1, and finally through the rack on the movable side plate to the friction energy dissipation device. Its displacement amplification factor is equal to the ratio of the gear diameter D to the gear column diameter d. Its main function is to amplify the displacement of the structure so that the damper can dissipate energy more effectively, thereby improving the seismic resistance of the overall structure.

[0012] The assembled energy-consuming unit includes a central circular steel plate 2. On one side of the central circular steel plate 2, a third layer of vulcanized viscoelastic material 8-3, a left circular gear steel plate 6-2, a fourth layer of vulcanized viscoelastic material 8-4, and a left fixed circular steel plate 6-1 are arranged in sequence. On the other side, a second layer of viscoelastic material 8-2, a right circular gear steel plate 6-3, a first layer of viscoelastic material 8-1, and a right fixed circular steel plate 6-4 are arranged.

[0013] The upper and lower surfaces of the center of the middle circular steel plate 2 are provided with a cylindrical protrusion 3. The center of the left fixed circular steel plate 6-1 and the right fixed circular steel plate 6-4 are provided with grooves of the same size, so that the protruding cylindrical protrusion 3 is connected to the groove. The diameter of the through hole in the center of the left circular gear steel plate 6-2 and the right circular gear steel plate 6-3 is larger than the diameter of the cylindrical protrusion 3, so that the left circular gear steel plate 6-2 and the right circular gear steel plate 6-3 can rotate.

[0014] The surfaces of the left fixed circular steel plate 6-1, the left circular gear steel plate 6-2, the middle circular steel plate 2, the right fixed circular steel plate 6-3, and the right circular gear steel plate 6-4 are all provided with through holes of corresponding sizes, and lead cores are passed through the through holes.

[0015] The assembled displacement amplification unit includes an upper transmission steel arm 1-2, a lower transmission steel arm 1-1, an upper gear column 2-2, a lower gear column 2-1, an upper gear 3-2, a lower gear 3-1, a left steel plate 5-2, a right steel plate 5-1, an upper guide plate 4-2, and a lower guide plate 4-1.

[0016] Weld the upper gear 3-2 to the upper gear column 2-2 so that the upper gear 3-2 meshes with the left circular gear steel plate 6-2. Insert the upper guide plate 4-2 into the right end. The upper transmission steel arm 1-2 is located between the upper guide plate 4-2 and the upper gear 2-2. The upper guide plate 4-2 is located on the upper left and welded to the side of the right fixed circular steel plate 6-4. One end of the upper transmission steel arm 1-2 is fixedly connected to the beam end embedded part 11-1 with bolts, and the other end is connected to the upper gear column 2-2 through the transmission gear of the upper transmission arm 1-1.

[0017] The upper drive steel arm 1-2 and the lower drive steel arm 1-1 are key components of the assembled disc-type rotating lead viscoelastic damper. The upper drive steel arm 1-2 is a steel component with an arc-shaped arm structure. Both upper and lower drive steel arms 1-2 and 1-1 are used to transmit the beam displacement to the damper's gear system. When the beam displaces, the upper drive steel arm moves accordingly, driving the upper gear column 2-2 to rotate. Through the gear transmission system, the displacement of the upper and lower drive steel arms 1-2 is amplified, thereby enhancing the damper's energy dissipation effect. This displacement amplification mechanism allows the damper to more effectively absorb and dissipate seismic energy.

[0018] The upper guide plate 4-2 and the lower guide plate 4-1 are flat steel components with guide grooves. They guide and restrict the movement of the upper gear column 2-2 and the lower gear column 2-1, ensuring they maintain the correct trajectory and position during movement and preventing deviation or jamming. When the beam displaces, the upper transmission steel arm 1-2 drives the upper gear column 2-2. The upper guide plate 4-2, through its guiding function, ensures smooth force transmission, thereby effectively amplifying the displacement and enhancing the energy dissipation effect of the damper.

[0019] The lower gear 3-1 is welded to the lower gear column 2-1, so that the lower gear 3-1 meshes with the right circular gear steel plate 6-4. The left end is inserted into the lower guide plate 4-1. The lower transmission steel arm 1-1 is located between the lower guide plate 4-1 and the lower gear 3-1. The lower guide plate 4-1 is located at the lower right and welded to the side of the left fixed circular steel plate 6-1. One end of the lower transmission steel arm 1-1 is fixedly connected with bolts through the column end embedded part 11-2, and the other end is connected to the lower gear column 2-1 through the transmission gear of the lower transmission steel arm 1-1.

[0020] The upper guide plate 4-2 is fixed to the left fixed circular steel plate 6-1 by welding, and the lower guide plate 4-1 is also fixed to the right fixed circular steel plate 6-4 by welding.

[0021] Screw holes are provided on the left fixed circular steel plate 6-1 and the right fixed circular steel plate 6-4 respectively. By installing bolt 7-1 and bolt 7-2 in the screw holes, the left steel plate 5-2 and the right steel plate 5-1 are fixed to the left and right fixed circular steel plates.

[0022] The beneficial effects of this utility model are:

[0023] By adjusting the diameters of the upper transmission steel arm and the upper gear cylinder, or the lower transmission steel arm and the lower gear cylinder, or by adjusting the horizontal distance between the lead core and the upper or lower gear steel arm, the displacement amplification can be controlled, thus allowing for controllable adjustment of the damper's energy dissipation and vibration reduction effect. Simultaneously, the materials used are low-cost, and their placement at beam-column joints facilitates installation and replacement. The displacement of the joints can be amplified, improving the energy dissipation and vibration reduction effect of the damper under small displacements, effectively enhancing the seismic performance of the building structure, and facilitating replacement after an earthquake.

[0024] The damper incorporates two energy dissipation mechanisms: lead shear and rubber shear. The controllable energy dissipation effect of the lead viscoelastic composite damper is achieved by adjusting the diameter of the lead core and the thickness of the rubber layer. Beam-column displacement is transmitted through a transmission steel arm, gear cylinder, gear, and circular gear steel plate. The most significant feature of the lead viscoelastic composite damper is its ability to amplify the minute displacements of beams and columns under minor earthquakes. These small displacements are transformed into displacements between the steel plate and the viscoelastic material, and between the steel plate and the lead core. The damper is connected via pre-embedded components, and the gear cylinder is welded to the gear, preventing detachment. This allows the damper to dissipate energy under large earthquakes, pre-deforming the main structure and concentrating damage within the damper for better protection of the main structure.

[0025] The size of this utility model can be determined according to the site type and the seismic fortification intensity. Attached Figure Description

[0026] Figure 1 This is the front view of the present invention.

[0027] Figure 2 This is a frontal three-dimensional view of the present invention.

[0028] Figure 3 This is a three-dimensional side view of the present invention.

[0029] Figure 4 This is a detailed drawing of the component parts of this utility model.

[0030] Figure 5 This is a disassembly diagram of the damper of this utility model.

[0031] Figure 6 This is a detailed drawing of the connection part of this utility model.

[0032] Figure 7 This is an application diagram of the present utility model.

[0033] Figure label:

[0034] In the diagram: Upper transmission steel arm 1-1, lower transmission steel arm 1-2, upper gear column 2-1, lower gear column 2-2, cylinder 3, upper gear 3-1, lower gear 3-2, upper guide plate 4-1, lower guide plate 4-2, right side steel plate 5-1, left side steel plate 5-2, left side fixed circular steel plate 6-1, left side circular gear steel plate 6-2, middle circular steel plate 2, right side circular gear steel plate 6-3, right side fixed circular steel plate 6-4, bolt 1 7-1, bolt 2 7-2, first layer of vulcanized viscoelastic material 8-1, second layer of viscoelastic material 8-2, third layer of vulcanized viscoelastic material 8-3, fourth layer of vulcanized viscoelastic material 8-4, lead core 9-1, lead core 9-2, lead core 9-3, lead core 9-4, column segment embedded part 11-2, beam end embedded part 11-1, anchor bar 10-1, anchor bar 10-2, groove 12-1, groove 12-2. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings.

[0036] like Figures 1-6 As shown, a prefabricated disc-type rotating lead viscoelastic damper with replaceable beam-column joints includes prefabricated energy-dissipating unit components and prefabricated displacement amplification unit components.

[0037] The prefabricated energy-dissipating unit is installed at the beam-column joint to absorb and dissipate seismic energy.

[0038] The assembled energy-dissipating unit is equipped with assembled displacement amplification units on both sides. The assembled displacement amplification units are used to amplify the displacement of the structure and dissipate energy.

[0039] The prefabricated energy-dissipating unit is an engineering vibration damping device that, when installed at beam-column joints, effectively absorbs and dissipates seismic energy, reducing damage to the main structure. This damper can be used for seismic reinforcement of existing buildings, especially old buildings or structures with insufficient seismic resistance, and can also be used in new buildings to achieve the principles of "strong columns, weak beams" and "strong joints, weak components."

[0040] The assembled displacement amplification unit is an additional device used to enhance the performance of the damper. When the beam or column deforms, the displacement is transmitted sequentially through the upper transmission steel arm 1-2 or the lower transmission steel arm 1-1, the upper gear column 2-2 or the lower gear column 2-1, the upper gear 3-2 or the lower gear 3-1, and finally through the rack on the movable side plate to the friction energy dissipation device. Its displacement amplification factor is equal to the ratio of the gear diameter D to the gear column diameter d. Its main function is to amplify the displacement of the structure so that the damper can dissipate energy more effectively, thereby improving the seismic resistance of the overall structure.

[0041] The displacement-enlarging disc-type rotational damper, from left to right, comprises a left fixed circular steel plate 6-1, a first layer of viscoelastic material 8-1, a left circular gear steel plate 6-2, a second layer of viscoelastic material 8-2, a middle circular steel plate 2, a third layer of vulcanized viscoelastic material 8-3, a right circular gear steel plate 6-3, a fourth layer of vulcanized viscoelastic material 8-4, and a right fixed circular steel plate 6-4. The left fixed circular steel plate 6-1, the left circular gear steel plate 6-2, the middle circular steel plate 2, the right circular gear steel plate 6-3, and the right fixed circular steel plate 6-4 have corresponding through holes, with a lead core inserted through each hole. The first layer of viscoelastic material 8-1 is vulcanized and bonded to the left fixed circular steel plate 6-1 and the left circular gear steel plate 6-2. The second layer of viscoelastic material 8-2 is vulcanized and bonded to the middle circular steel plate 2 and the left circular gear steel plate 6-2. The third layer of viscoelastic material 8-3... The elastic material 8-3 is vulcanized and bonded to the middle circular steel plate 2 and the right circular gear steel plate 6-3. The fourth layer of viscoelastic material is vulcanized and bonded to the right circular gear steel plate 6-3 and the right fixed circular steel plate 6-4. A cylindrical protrusion 3 is provided on the left and right upper surfaces of the middle circular steel plate 2. Grooves 12-1 and 12-2 of the same size are provided at the center of the fixed circular steel plate 6-1 and the right circular gear steel plate 6-4. The cylindrical protrusions on the left and right upper surfaces of the middle circular steel plate 2 are embedded in grooves 12-1 and 12-2, respectively. The right end of the upper gear restricts the movement of the gear column through the upper guide rail, and the left end of the lower gear restricts the movement of the gear column through the lower guide rail. The diameter of the upper and lower gears is twice that of the gear column. The biggest feature of the displacement amplification disc rotation damper is that it amplifies the small displacement of the beam and column under small earthquakes through the concentric circle principle.

[0042] Furthermore, it also includes an upper transmission steel arm 1-2 and a lower transmission steel arm 1-1. The upper end of the upper transmission arm 1-1 is fixed to the pre-embedded part 11-2 at the beam end. The upper transmission steel arm 1-2 forms a tooth meshing with the upper gear column 2-2 through a transmission gear. One end of the lower transmission arm is fixed to the column, and the lower transmission steel arm 1-1 forms a tooth meshing with the lower gear column 2-1 through a transmission gear. The dimensions of the middle circular steel plate 2 are consistent with the dimensions of the first layer of vulcanized viscoelastic material 8-1, the second layer of viscoelastic material 8-2, the third layer of vulcanized viscoelastic material 8-3, and the fourth layer of vulcanized viscoelastic material 8-4. The dimensions of the four fixed circular steel plates 6-1, 6-2, 6-4, and 6-3 on the left, are the same and larger than the middle circular steel plate 2. Screw holes are provided on the portions of the right and left fixed circular steel plates 6-4 and 6-1 that extend beyond the middle circular steel plate 2. Bolts are used to secure fasteners 5-1 and 5-2 to the left and right fixed circular steel plates 6-1 and 6-4 respectively, forming a support with the beam-column structure. Four lead cores are used, symmetrically and evenly distributed relative to the central axis of the damper. A set of embedded parts is installed at both the column and beam ends of the lead viscoelastic damper, and these embedded parts are reliably anchored to the concrete via anchor bars.

[0043] When the beam-column is displaced, it causes the connected upper transmission steel arm 1-2 or lower transmission steel arm 1-1 to be displaced. The upper transmission steel arm 1-2 drives the upper gear column 2-2 to rotate, which in turn drives the upper gear 3-2 to rotate. The left circular gear steel plate 6-1 uses the cylindrical protrusion 3 on the surface of the middle circular steel plate 2 as a fulcrum, which is equivalent to a disc rotation fulcrum. Through the left circular gear steel plate 6-1, it generates a disc rotation relative to the middle circular steel plate 2. The left circular gear steel plate 6-2 and the right circular gear steel plate 6-3 rotate in opposite directions, which increases the damping effect of the viscoelastic material and the shearing of the lead core during the disc rotation.

[0044] The working principle of this utility model:

[0045] Under minor earthquakes, the connected transmission steel arm displaces, driving the disc-type rotating lead viscoelastic damper to rotate via gear transmission. This fully utilizes two different energy dissipation mechanisms: lead core shear hysteresis deformation and high-damping rubber shear hysteresis deformation, minimizing the relative rotation angle of the beam-column joint and effectively protecting the beam-column joint of the frame structure. The prefabricated disc-type rotating lead viscoelastic damper is connected to the beam-column joint via fasteners. The beam-column displacement is converted into the displacement of a rotatable circular steel plate, causing relative displacement of the rotatable steel plate to drive shear deformation of the lead core and high-damping rubber material to dissipate energy. The fixed circular steel plate and the intermediate steel plate themselves do not participate in deformation energy dissipation.

[0046] During construction, a set of embedded parts are installed in both columns and beams. The embedded parts are reliably connected to the concrete through anchor bars. According to previous studies and earthquake damage surveys, severe damage at the beam-column joints of frame structures will affect the overall performance of the structure. Dampers are placed at the beam-column joints. When an earthquake occurs, the dampers rotate, thereby using replaceable energy dissipation components to consume energy. This concentrates the damage on the dampers, which can effectively protect the safety of the main structure and allow for rapid repair after the earthquake, ensuring the normal use of the structure.

[0047] A method for using a replaceable prefabricated displacement-amplifying disc-type rotational viscoelastic damper for beam-column joints includes the following steps:

[0048] When a beam-column shifts, it causes the connected upper transmission steel arm 1-2 or lower transmission steel arm 1-1 to shift as well. The upper transmission steel arm 1-2 causes the upper gear column 2-2 to twist, which in turn causes the upper gear 3-2 to rotate. The left circular gear steel plate 6-1 rotates relative to the middle circular steel plate 2 by using the cylindrical protrusion 3 on the surface of the middle circular steel plate 2 as a disc-shaped rotation fulcrum. When a beam-column adjacent to a beam-column shifts, it causes the connected lower transmission steel arm 1-1 to shift as well. The lower transmission steel arm 1-1 causes the lower gear column 2-1 to twist, which in turn causes the lower gear 3-1 to rotate. It rotates relative to the middle plate by using the cylindrical protrusion 3 on the middle circular steel plate as a fulcrum. The steel plate and rubber are vulcanized into a whole by high temperature and high pressure. The lead core is then injected into the reserved circular hole. The rotation of the left circular gear steel plate 6-2 and the right circular gear steel plate 6-3 shears the inner rubber and lead core to achieve energy dissipation.

[0049] The beam-column joint area of ​​a frame structure is prone to angular displacement under seismic loading, which in turn causes displacement of the connected transmission steel arm. This displacement is amplified by gear transmission, driving a large-displacement disc-type rotating viscoelastic damper. This fully utilizes the energy dissipation mechanisms of lead core and rubber shear deformation to reduce the displacement of the beam-column joint, thus protecting the beam-column joint from damage. The large-displacement disc-type rotating damper is connected to the beam-column joint via a fixing component. The displacement of the beam and column is converted into the displacement of the left and right rotatable circular steel plates 6-2 and 6-3, causing relative displacement between the left and right rotatable circular steel plates and the middle layer steel plate 2. This displacement drives the lead core and viscoelastic material to dissipate energy through shear deformation. The left and right side steel plates and the middle circular steel plate 2 themselves do not participate in deformation energy dissipation. Lead core holes are opened at the same distance from the center of the circular steel plates, and the lead cores are located in these holes. Cover plates are installed at both ends of the lead cores. Four lead cores are used, symmetrically and evenly distributed relative to the central axis of the damper. Disc-type rotating lead viscoelastic dampers dissipate vibrational energy in structures by applying multi-directional pressure to a lead core, which generates damping force upon shear deformation. The magnitude of the damping force is affected by parameters such as the lead core diameter, distance from the lead core to the central axis, rubber layer thickness, and rubber shear modulus in displacement-scale disc-type rotating dampers; therefore, these parameters can be adjusted according to specific conditions.

[0050] The bolts used are M10 and M10.9 grade high-strength bolts, which facilitate the replacement of the disc-type rotating lead viscoelastic damper and allow for increased bolt preload using a torque wrench, preventing bolt breakage under bending moment and hindering the damper's energy dissipation function. The upper drive arm 1-1 and lower drive arm 1-2 are made of Q355 steel, while other steels are made of Q235. This prevents damage to the drive arms during movement and reduces costs while maintaining the overall energy dissipation characteristics of the damper.

Claims

1. A prefabricated disc-type rotating lead viscoelastic damper with replaceable beam-column joints, characterized in that, This includes prefabricated energy-consuming units and prefabricated displacement amplification units; The prefabricated energy-dissipating unit is installed at the beam-column joint to absorb and dissipate seismic energy. The assembled energy-dissipating unit is equipped with assembled displacement amplification units on both sides. The assembled displacement amplification units are used to amplify the displacement of the structure and dissipate energy. The assembled displacement amplification unit includes an upper transmission steel arm (1-2), a lower transmission steel arm (1-1), an upper gear column (2-2), a lower gear column (2-1), an upper gear (3-2), a lower gear (3-1), a left steel plate (5-2), a right steel plate (5-1), an upper guide plate (4-2), and a lower guide plate (4-1). Weld the upper gear (3-2) to the upper gear column (2-2) so that the upper gear (3-2) meshes with the left circular gear steel plate (6-2). Insert the upper guide plate (4-2) into the right end. The upper transmission steel arm (1-2) is located between the upper guide plate (4-2) and the upper gear (3-2). The upper guide plate (4-2) is located on the upper left and welded to the side of the right fixed circular steel plate (6-4). One end of the upper transmission steel arm (1-2) is fixedly connected with bolts through the beam end embedded part (11-1), and the other end is connected to the lower gear column (2-1) through the transmission gear of the lower transmission steel arm (1-1). The upper drive steel arm (1-2) and the lower drive steel arm (1-1) are steel components with curved arm-like structures; the upper drive steel arm (1-2) and the lower drive steel arm (1-1) are used to transmit the displacement of the beam to the gear system of the damper.

2. The beam-column joint replaceable assembled disc-type rotational leaded viscoelastic damper according to claim 1, characterized in that, The assembled energy-consuming unit includes a central circular steel plate (2). On one side of the central circular steel plate (2), a third layer of vulcanized viscoelastic material (8-3), a left circular gear steel plate (6-2), a fourth layer of vulcanized viscoelastic material (8-4), and a left fixed circular steel plate (6-1) are arranged in sequence. On the other side, a second layer of viscoelastic material (8-2), a right circular gear steel plate (6-3), a first layer of viscoelastic material (8-1), and a right fixed circular steel plate (6-4) are arranged.

3. The prefabricated disc-type rotating lead viscoelastic damper with replaceable beam-column joint according to claim 2, characterized in that, The upper and lower surfaces of the center of the middle circular steel plate (2) are provided with a cylindrical protrusion (3). The center of the left fixed circular steel plate (6-1) and the right fixed circular steel plate (6-4) are provided with grooves of the same size, so that the protruding cylindrical protrusion (3) is connected to the groove. The diameter of the through hole in the center of the left circular gear steel plate (6-2) and the right circular gear steel plate (6-3) is larger than the diameter of the cylindrical protrusion (3), so that the left circular gear steel plate (6-2) and the right circular gear steel plate (6-3) can rotate.

4. The beam-column joint replaceable assembled disc-type rotational leaded viscoelastic damper according to claim 3, characterized in that, The surfaces of the left fixed circular steel plate (6-1), the left circular gear steel plate (6-2), the middle circular steel plate (2), the right circular gear steel plate (6-3), and the right fixed circular steel plate (6-4) are all provided with through holes of corresponding sizes, and lead cores are passed through the through holes.

5. The beam-column joint replaceable assembled disc-type rotational leaded viscoelastic damper according to claim 1, wherein The upper guide plate (4-2) and the lower guide plate (4-1) are flat steel components with guide grooves. The upper guide plate (4-2) and the lower guide plate (4-1) are used to guide and restrict the movement of the upper gear column (2-2) and the lower gear column (2-1), ensuring that the upper gear column (2-2) and the lower gear column (2-1) maintain the correct trajectory and position during movement, and preventing them from deviating or getting stuck.

6. The beam-column joint replaceable assembled disc-type rotational leaded viscoelastic damper according to claim 5, wherein The lower gear column (2-1) is welded to the lower gear (3-1), so that the lower gear (3-1) meshes with the fixed circular steel plate (6-4) on the right side. The left end is inserted into the lower guide plate (4-1). The lower transmission steel arm (1-1) is located between the lower guide plate (4-1) and the lower gear (3-1). The lower guide plate (4-1) is located at the lower right and welded to the side of the fixed circular steel plate (6-1) on the left side. One end of the lower transmission steel arm (1-1) is fixedly connected with bolts through the column end embedded part (11-2), and the other end is connected to the lower gear column (2-1) through the transmission gear of the lower transmission steel arm (1-1).

7. The beam-column joint replaceable assembled disc-type rotational leaded viscoelastic damper according to claim 5, wherein The upper guide plate (4-2) is fixed to the left fixed circular steel plate (6-1) by welding, and the lower guide plate (4-1) is also fixed to the right fixed circular steel plate (6-4) by welding.

8. The beam-column joint replaceable assembled disc-type rotational leaded viscoelastic damper according to claim 5, wherein Screw holes are provided on the left fixed circular steel plate (6-1) and the right fixed circular steel plate (6-4) respectively. By setting bolt one (7-1) and bolt two (7-2) in the screw holes, the left steel plate (5-2) and the right steel plate (5-1) are fixed to the left and right fixed circular steel plates.

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