Beam-column joint replaceable assembled composite sectorial viscoelastic damper

Abstract

This invention discloses a prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joints, comprising a vertical steel plate and a horizontal steel plate connected by a pivot axis. The vertical and horizontal steel plates are vertically arranged, and their inner surfaces are connected by prefabricated energy-dissipating unit components. Each prefabricated energy-dissipating unit component includes an outer sector-shaped rubber plate, an inner sector-shaped rubber plate, a horizontal corrugated steel plate, and a vertical corrugated steel plate. The outer surface of the vertical steel plate is connected to the horizontal corrugated steel plate, and the outer surface of the horizontal steel plate is connected to the vertical corrugated steel plate. The vertical and horizontal steel plates are connected by the outer and inner sector-shaped rubber plates, which are arranged by a pivot axis. This invention dissipates seismic energy through the deformation of the damper and concentrates damage within the damper, protecting the main structure from further damage. After an earthquake, the damaged damper can be repaired or replaced to restore the structure to its usability as quickly as possible.

Description

Technical Field

[0001] This invention belongs to the field of seismic resistance and vibration reduction technology in civil engineering, and specifically relates to a prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joints. Background Technology

[0002] According to the earthquake damage survey of frame structures, the beam-column joints of frame structures are the weakest links in the structure that are extremely prone to damage. Once the joints are damaged, the building will tilt and collapse, greatly increasing the difficulty and cost of post-disaster repair. The most common forms of damage in earthquakes are concrete crushing and steel buckling in the joint area, which lead to structural failure or collapse.

[0003] To mitigate the damage caused by earthquakes, various seismic strengthening measures for beam-column joints have emerged to address the difficulty in repairing such damage. Traditional seismic strengthening methods increase the strength and stiffness of components by enlarging the column cross-section and increasing the reinforcement ratio of beams, thereby improving the seismic performance of beam-column joints. However, this approach still has many problems, such as the difficulty and high cost of post-earthquake repair, and even the inability to repair, leading to demolition and reconstruction and resulting in severe resource waste. Therefore, the most practical and economical approach currently is the replacement structure. Placing a replaceable component at the beam-column joint of the structural member not only serves to absorb energy and protect the frame structure during earthquakes, but also allows the structure to quickly restore its functionality after the earthquake by repairing or replacing the damaged component.

[0004] Currently, common beam-column joint dampers include friction dampers, metal dampers, and viscoelastic dampers. Among them, friction dampers generate sliding friction through the mutual friction between the surfaces of two components, thereby hindering the sliding of the components and achieving the purpose of energy dissipation; however, friction dampers suffer from excessive wear and tear, and are not easy to repair or replace under the secondary disasters of earthquakes.

[0005] Metal dampers utilize the plastic hysteretic deformation of metal materials when they yield to dissipate seismic energy, thereby reducing the seismic response of the structure; however, metal dampers are not easy to dissipate energy under frequent earthquakes, and are prone to plastic deformation under rare earthquakes, making them unusable.

[0006] Viscoelastic dampers are effective energy-dissipating and vibration-damping devices. They rely on the shear hysteresis energy dissipation characteristics of viscoelastic damping materials to increase structural damping and reduce the dynamic response of the structure, thereby achieving the purpose of energy dissipation and vibration reduction. Installing replaceable sector-shaped viscoelastic dampers at beam-column joints can concentrate damage on replaceable components. However, viscoelastic dampers made of viscoelastic materials have lower initial stiffness, resulting in lower energy dissipation capacity and ductility compared to friction dampers and metal dampers. Furthermore, the low energy dissipation factor of viscoelastic materials and their susceptibility to temperature and frequency influences limit their energy dissipation capacity. Currently, sector-shaped viscoelastic dampers used in engineering to protect beam-column joints generally suffer from maintenance difficulties and unsatisfactory performance during moderate and large earthquakes. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, the present invention aims to provide a prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joints. This damper has a good shock absorption effect and is placed at the beam-column joints of the frame structure. Deformation and energy dissipation are mainly borne by the damper, and it 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.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joints includes a vertical steel plate and a horizontal steel plate, which are connected by a pivot axis. The vertical and horizontal steel plates are arranged vertically, and their inner surfaces are connected by prefabricated energy-dissipating unit components.

[0010] The assembled energy-consuming unit includes an outer fan-shaped rubber plate, an inner fan-shaped rubber plate, a horizontal corrugated steel plate, and a vertical corrugated steel plate.

[0011] A horizontal corrugated steel plate is connected to the outer side of a vertical steel plate, and a vertical corrugated steel plate is connected to the outer side of a horizontal steel plate.

[0012] The vertical steel plate and the horizontal steel plate are connected by an outer fan-shaped rubber plate and an inner fan-shaped rubber plate, which are set with the rotating shaft as the center.

[0013] One end of the outer fan-shaped rubber plate is connected to the vertical steel plate by a horizontal steel plate fixing bolt; the other end is set inside the vertical steel plate groove on the vertical steel plate to form sliding friction.

[0014] One end of the inner fan-shaped rubber plate is connected to the horizontal steel plate by a vertical steel plate fixing bolt; the other end is set inside the horizontal steel plate groove on the horizontal steel plate to form sliding friction.

[0015] The outer fan-shaped rubber plate and the inner fan-shaped rubber plate are fan-shaped sandwich steel plates, and the structure of the fan-shaped sandwich steel plate is steel plate-rubber-steel plate;

[0016] The horizontal corrugated steel plate is provided with an inner cover plate and an outer cover plate at both ends. The inner cover plate is connected to the vertical steel plate by a horizontal cover plate-vertical steel plate bolt. The horizontal corrugated steel plate is also provided with an inner cover plate and an outer cover plate at both ends. The inner cover plate is connected to the horizontal steel plate by a vertical cover plate-horizontal steel plate bolt.

[0017] The outer fan-shaped rubber plate is topped with an outer sandwich upper steel plate and an outer sandwich lower steel plate, respectively. The outer fan-shaped rubber plate, the outer sandwich upper steel plate, and the outer sandwich lower steel plate are firmly bonded together with epoxy resin high-strength adhesive to form a fan-shaped sandwich steel plate. The outer fan-shaped rubber plate, the outer sandwich upper steel plate, and the outer sandwich lower steel plate are connected to the horizontal steel plate top and bottom by horizontal steel plate fixing bolts.

[0018] The inner fan-shaped rubber layer is topped with an upper inner core steel plate and a lower inner core steel plate, respectively. The inner fan-shaped rubber layer, the upper inner core steel plate, and the lower inner core steel plate are firmly bonded together with epoxy resin high-strength adhesive to form a fan-shaped sandwich steel plate, which is connected to the vertical steel plate by vertical steel plate fixing bolts.

[0019] The bottoms of the vertical and horizontal steel plate grooves are rough, thereby increasing the sliding friction of the outer and inner core lower steel plates, and thus increasing frictional energy consumption.

[0020] The vertical corrugated steel plate is internally welded with a horizontal corrugated steel plate inner cover plate and a horizontal corrugated steel plate outer cover plate. The horizontal corrugated steel plate inner cover plate and the horizontal corrugated steel plate outer cover plate are on the same plane as the vertical steel plate, and the inner layer of the vertical corrugated steel plate is aligned with the connection point of the vertical steel plate. The three are connected by horizontal cover plate-vertical steel plate bolts and cover plate-column bolts, respectively.

[0021] The horizontal cover plate-vertical steel plate bolts and the cover plate-column bolts pass through the horizontal corrugated steel plate inner cover plate and the horizontal corrugated steel plate outer cover plate at both ends of the horizontal corrugated steel plate.

[0022] The horizontal corrugated steel plate is internally welded with a vertical corrugated steel plate inner cover plate and a vertical corrugated steel plate outer cover plate. The corrugated steel plate inner cover plate and the vertical corrugated steel plate outer cover plate are on the same plane as the horizontal steel plate, and the connection between the inner layer of the horizontal corrugated steel plate and the horizontal steel plate is aligned. The three are connected by vertical cover plate-horizontal steel plate bolts and cover plate-beam bolts, respectively.

[0023] Vertical cover plate - horizontal steel plate bolts, vertical corrugated steel plate inner cover plate set at both ends of vertical corrugated steel plate, cover plate - beam bolts pass through vertical corrugated steel plate outer cover plate.

[0024] The vertical and horizontal corrugated steel plates are energy-consuming corrugated steel plates with trapezoidal cross sections, and rubber layer one and rubber layer two are arranged sequentially along the inner side of the trapezoidal cross section.

[0025] An iron ball is welded above the horizontal steel plate, and a spherical groove is cut at the bottom of the vertical steel plate. After rotation, the iron ball enters the groove, which serves as a limit.

[0026] All the steel plates are connected by bolts for easy replacement.

[0027] A method for using a replaceable prefabricated composite sector viscoelastic damper for beam-column joints includes the following steps;

[0028] When the vertical and horizontal steel plates rotate, they cause the sector-shaped sandwich steel plate to slide; when the vertical and horizontal steel plates deform significantly, the sector-shaped sandwich steel plate slides into the corrugated steel plate compartment of the horizontal and vertical corrugated steel plates.

[0029] The corrugated steel plate is made of low yield point mild steel. The corrugated steel plate continues to dissipate earthquakes and fully utilizes the material properties to achieve the purpose of staged energy dissipation.

[0030] The horizontal and vertical corrugated steel plates are trapezoidal cross-section corrugated steel plates made by bending flat steel plates in the factory. Cover plates are placed at both ends of the horizontal and vertical corrugated steel plates, and the cover plates are connected to the steel plates and the embedded steel plates of the beams and columns by bolts.

[0031] Under small deformation conditions, energy is dissipated by the sliding of the sector-shaped sandwich steel plate;

[0032] Under large deformation conditions, the sector-shaped sandwich steel plate is completely inserted into the corrugated steel plate compartments of the horizontal and vertical corrugated steel plates, acting as a metal damper. Based on the principle of staged energy dissipation, it utilizes the energy dissipated during the yielding of the horizontal and vertical corrugated steel plates. Rubber layers one and two are arranged inside the horizontal and vertical corrugated steel plates to prevent the corrugated steel plates from rapidly entering the plastic stage. The rubber layers are bonded to the corrugated steel plates using a high-strength epoxy resin adhesive. By changing the material, thickness, and other parameters of the corrugated steel plates, its energy dissipation capacity is improved to meet the needs of practical engineering projects.

[0033] The vertical steel plate and the horizontal steel plate are hinged by a rotating shaft. The rotation of the rotating shaft causes the fan-shaped sandwich steel plate to slide.

[0034] The vertical and horizontal steel plate grooves generate frictional energy dissipation when the sector-shaped sandwich steel plate slides. A small ball is welded to the horizontal steel plate, and a spherical groove is set at the bottom of the vertical steel plate. The spherical groove is a hollow circular groove. When the sector-shaped sandwich steel plate deforms significantly, the vertical and horizontal steel plates overlap vertically, and the small ball enters the spherical groove to act as a limit, restricting the vertical and horizontal steel plates from continuing to rotate.

[0035] The beneficial effects of this invention are:

[0036] The assembled composite viscoelastic damper proposed in this invention can achieve staged energy dissipation;

[0037] In the case of minor earthquakes, the energy dissipation is carried out in the first stage, while in the case of moderate and major earthquakes, it is carried out in the second stage. In the first stage, the relative rotation of the inner and outer fan-shaped sandwich steel plates causes friction between the inner and outer fan-shaped sandwich steel plates and the bottom of the groove, thus dissipating energy through friction. At the same time, the rubber plate undergoes axial deformation, which also dissipates energy. The two mechanisms of friction between the inner and outer fan-shaped sandwich steel plates and the bottom of the groove, and shear deformation of the rubber plate, dissipate energy together. After the rotation ends, the second stage of energy dissipation begins. The fan-shaped sandwich steel plates enter the corrugated steel plate compartment, where the yielding plastic deformation of the corrugated steel plates dissipates seismic energy. This fully utilizes the strong energy dissipation capacity of the metal damper. The corrugated steel plate plays a major role in the energy dissipation of the damper and also acts as a brace, which can effectively prevent the damper from being crushed, thus protecting the beam-column joint from damage under the action of a major earthquake.

[0038] The corrugated steel plate of the present invention can effectively protect the sector-shaped sandwich steel plate from damage under the action of a large earthquake, and effectively improve its energy dissipation capacity and load-bearing capacity. Compared with ordinary sector-shaped viscoelastic dampers, it can better cope with different types of seismic waves, and has less loss compared with friction dampers.

[0039] This invention comprises a horizontal steel end plate, a vertical steel end plate, inner and outer fan-shaped sandwich steel plates, and corrugated steel plates to form an energy dissipation unit. The two bottom vertical steel plates are connected to the inner and outer fan-shaped sandwich steel plates by bolts. The bottom and two vertical steel plates are hinged by a pivot, which facilitates the repair and replacement of the damper after minor earthquakes. The corrugated steel plates are welded to the bottom and two vertical steel plates, making them less prone to detachment. This allows the damper to dissipate energy under major earthquakes, deforming and dissipating energy before the main structure, and concentrating damage on the damper to better protect the main structure.

[0040] The size of the invention can be determined according to the site type and seismic fortification intensity. Attached Figure Description

[0041] Figure 1 This is the front view of the present invention.

[0042] Figure 2 This is a frontal three-dimensional view of the present invention.

[0043] Figure 3 This is a three-dimensional view of the reverse side of the present invention.

[0044] Figure 4 This is a cross-sectional view of a corrugated steel plate.

[0045] Figure 5 This is an internal view of a corrugated steel plate.

[0046] Figure 6 This is a disassembly diagram of a corrugated steel plate.

[0047] Figure 7 This is an application diagram of the present invention.

[0048] Figure 8 This is a schematic diagram illustrating the working principle of the present invention.

[0049] Figure label:

[0050] In the diagram: 1-1 Horizontal corrugated steel plate, 1-2 Vertical corrugated steel plate, 2-1 Vertical steel plate, 2-2 Horizontal steel plate, 3-1 Outer sandwich upper steel plate, 3-2 Outer sandwich lower steel plate, 4 Vertical steel plate fixing bolt, 5-1 Inner sandwich upper steel plate, 5-2 Inner sandwich lower steel plate, 6 Horizontal steel plate fixing bolt, 7 Rotating shaft, 8 Iron ball, 9 Outer fan-shaped rubber plate, 10-1 Inner cover plate of horizontal corrugated steel plate, 10-2 Outer cover plate of horizontal corrugated steel plate, 11 Horizontal cover Plate - Vertical steel plate bolt, 12 Spherical groove, 13 Vertical steel plate groove, 14 Inner fan-shaped rubber layer, 15 Horizontal steel plate groove, 16 Vertical cover plate - Horizontal steel plate bolt, 17-1 Vertical corrugated steel plate inner cover plate, 17-2 Vertical corrugated steel plate outer cover plate, 18 Horizontal corrugated steel plate rubber layer, 19 Vertical corrugated steel plate rubber layer, 20 Cover plate - Column bolt, 21 Cover plate - Beam bolt, 22 Beam, 23 Column, 24 Beam embedded steel plate, 25 Column embedded steel plate. Detailed Implementation

[0051] The present invention will be further described in detail below with reference to the embodiments.

[0052] like Figures 1 to 4As shown, the replaceable prefabricated composite viscoelastic metal damper for beam-column joints of the present invention includes a horizontal corrugated steel plate 1-1, a vertical corrugated steel plate 1-2, a vertical steel plate 2-1, a horizontal steel plate 2-2, an outer sandwich upper steel plate 3-1, an outer sandwich lower steel plate 3-2, a vertical steel plate fixing bolt 4, an inner sandwich upper steel plate 5-1, an inner sandwich lower steel plate 5-2, a horizontal steel plate fixing bolt 6, a rotating shaft 7, an iron ball 8, an outer fan-shaped rubber plate 9, and an inner cover for the horizontal corrugated steel plate. Composed of: Plate 10-1, Horizontal corrugated steel plate outer cover plate 10-2, Horizontal cover plate-vertical steel plate bolt 11, Spherical groove 12, Vertical steel plate groove 13, Inner fan-shaped rubber layer 14, Horizontal steel plate groove 15, Vertical cover plate-horizontal steel plate bolt 16, Vertical corrugated steel plate inner cover plate 17-1, Vertical corrugated steel plate outer cover plate 17-2, Horizontal corrugated steel plate rubber layer one 18, Vertical corrugated steel plate rubber layer two 19, Cover plate-column bolt 20, Cover plate-beam bolt 21.

[0053] like Figures 1-3 As shown, the energy-consuming component of the present invention includes a horizontal corrugated steel plate 1-1, a vertical corrugated steel plate 1-2, an outer core lower steel plate 3-2, an inner core lower steel plate 5-2, an outer fan-shaped rubber plate 9, a vertical steel plate groove 13, an inner fan-shaped rubber layer 14, and a horizontal steel plate groove 15.

[0054] The energy is consumed by friction between the outer core lower steel plate 3-2 and the vertical steel plate groove 13, the energy is consumed by friction between the inner core lower steel plate 5-2 and the horizontal steel plate groove 15, the energy is consumed by plastic deformation of the horizontal corrugated steel plate 1-1 and the vertical corrugated steel plate 1-2 through metal yielding, and the energy is consumed by the outer fan-shaped rubber plate 9 and the inner fan-shaped rubber layer 14 through the shear deformation of the rubber.

[0055] The outer fan-shaped rubber plate 9 has an upper outer core steel plate 3-1 and a lower outer core steel plate 3-2 placed on its upper and lower sides, respectively, and is connected to the horizontal steel plate 2-2 by horizontal steel plate fixing bolts 6. The inner fan-shaped rubber layer 14 has an upper inner core steel plate 5-1 and a lower inner core steel plate 5-2 placed on its upper and lower sides, respectively, and is connected to the vertical steel plate 2-1 by vertical steel plate fixing bolts 4.

[0056] like Figure 5As shown, the inner cover plate 10-1 and the outer cover plate 10-2 of the horizontal corrugated steel plate 1-1 are welded inside. The inner cover plate 10-1 and the outer cover plate 10-2 of the horizontal corrugated steel plate are on the same plane as the vertical steel plate 2-1, and the inner layer of the corrugated steel plate is aligned with the vertical steel plate 2-1. The three are connected by horizontal cover plate-vertical steel plate bolts 11 and cover plate-column bolts 20, respectively. The inner cover plate 17-1 and the outer cover plate 17-2 of the vertical corrugated steel plate 1-2 are welded inside. The inner cover plate 17-1 and the outer cover plate 17-2 of the vertical corrugated steel plate are on the same plane as the horizontal steel plate 2-2, and the inner layer of the corrugated steel plate is aligned with the horizontal steel plate 2-2. The three are connected by vertical cover plate-horizontal steel plate bolts 16 and cover plate-beam bolts 21, respectively.

[0057] Each steel plate has two bolt holes, which are used to connect the steel plate to the sector-shaped sandwich steel plate. The steel plate is made of Q235 steel, which can prevent the steel plate from being damaged when the sector-shaped sandwich steel plate rotates, and can also reduce costs while maintaining the overall energy dissipation characteristics of the damper.

[0058] The bolts are M10 and M10.9 grade high-strength bolts, which facilitate the replacement of the sector-shaped sandwich steel plate and also allow the bolt preload to be increased by using a torque wrench, preventing the bolts from breaking under bending moment and hindering the damper from performing its energy dissipation function.

[0059] The rotating shaft 7 is made of Q235 steel. The entire rotating shaft is coated with anti-corrosion material and lubricant to ensure that the rotating shaft is not corroded and that the steel plate can rotate normally, so that the damper can drive the fan-shaped sandwich steel plate to slide and deform to dissipate energy through the rotation of the steel plate.

[0060] Working principle of the invention:

[0061] like Figure 8 As shown, under minor earthquakes, the outer and inner fan-shaped sandwich steel plates rub against the bottom of the grooves respectively, and the rubber inside the sandwich steel plates undergoes shear deformation. Under earthquake action, the three form the first line of defense of the energy dissipation unit. Under moderate and major earthquakes, as the rotation ends, the horizontal steel plate 2-2 overlaps with the vertical steel plate 2-1, and the corrugated steel plate becomes a shank brace, serving as the second line of defense of the energy dissipation unit to dissipate energy.

[0062] like Figure 7 As shown, the composite sector damper of the present invention is disposed at the intersection of column 22 and beam 23, and placed at the lower end of beam 23; column 22 is connected to the cover plate-column bolt 20 of the composite sector damper, and beam 23 is connected to the cover plate-beam bolt 21 of the composite sector damper.

[0063] During construction, damper installation positions are reserved at columns 22 and beams 23, respectively. The cover plate-beam bolts 21 and cover plate-column bolts 20 are placed into the pre-embedded steel plates 24 in beams 23 and 25 in columns, respectively, so that the dampers can be used normally. The spacing of the stirrups in columns 22 and beams 23 within the range of the reserved installation positions of the dampers is increased to compensate for the loss of bearing capacity. 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. By placing dampers at the beam-column joints, when an earthquake occurs, the dampers will rotate, thereby using replaceable energy dissipation components to consume energy, so that the damage is concentrated on the dampers, which can effectively protect the safety of the main structure and ensure the normal use of the structure after the earthquake.

Claims

1. A prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joints, characterized in that, It includes a vertical steel plate (2-1) and a horizontal steel plate (2-2), which are connected by a pivot (7). The vertical steel plate (2-1) and the horizontal steel plate (2-2) are arranged vertically, and the inner sides of the vertical steel plate (2-1) and the horizontal steel plate (2-2) are connected by assembled energy-consuming unit components. The assembled energy-consuming unit includes an outer fan-shaped rubber plate (9), an inner fan-shaped rubber layer (14), a horizontal corrugated steel plate (1-1), and a vertical corrugated steel plate (1-2). The outer side of the vertical steel plate (2-1) is connected to the horizontal corrugated steel plate (1-1), and the outer side of the horizontal steel plate (2-2) is connected to the vertical corrugated steel plate (1-2). The vertical steel plate (2-1) and the horizontal steel plate (2-2) are connected by an outer fan-shaped rubber plate (9) and an inner fan-shaped rubber layer (14), with the outer fan-shaped rubber plate (9) and the inner fan-shaped rubber layer (14) set with the rotating shaft (7) as the axis.

2. The prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joints according to claim 1, characterized in that, One end of the outer fan-shaped rubber plate (9) is connected to the vertical steel plate (2-1) by a horizontal steel plate fixing bolt (6); the other end is set inside the vertical steel plate groove (13) on the vertical steel plate (2-1) to form sliding friction; One end of the inner fan-shaped rubber layer (14) is connected to the horizontal steel plate (2-2) by a vertical steel plate fixing bolt (4); the other end is set inside the horizontal steel plate groove (15) on the horizontal steel plate (2-2) to form sliding friction. The bottoms of the vertical steel plate groove (13) and the horizontal steel plate groove (15) are rough.

3. The prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joints according to claim 2, characterized in that, The horizontal corrugated steel plate (1-1) is provided with an inner cover plate (10-1) and an outer cover plate (10-2) at both ends. The inner cover plate (10-1) is connected to the vertical steel plate (2-1) by a horizontal cover plate-vertical steel plate bolt (11). The horizontal corrugated steel plate (1-1) is provided with an inner cover plate (17-1) and an outer cover plate (17-2) at both ends. The inner cover plate (17-1) is connected to the horizontal steel plate (2-2) by a vertical cover plate-horizontal steel plate bolt (16).

4. The prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joint according to claim 3, characterized in that, The outer fan-shaped rubber plate (9) is placed with an outer core upper steel plate (3-1) and an outer core lower steel plate (3-2) on its upper and lower sides respectively. The outer fan-shaped rubber plate (9), the outer core upper steel plate (3-1) and the outer core lower steel plate (3-2) are firmly bonded together with epoxy resin high-strength adhesive to form a fan-shaped sandwich steel plate. The horizontal steel plate is connected to the horizontal steel plate (2-2) by horizontal steel plate fixing bolts (6). The inner fan-shaped rubber layer (14) is topped with an inner core upper steel plate (5-1) and an inner core lower steel plate (5-2). The inner fan-shaped rubber layer (14), the inner core upper steel plate (5-1), and the inner core lower steel plate (5-2) are firmly bonded together with epoxy resin high-strength adhesive to form a fan-shaped sandwich steel plate, which is connected to the vertical steel plate (2-1) by vertical steel plate fixing bolts (4).

5. A prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joints according to claim 3, characterized in that, The vertical corrugated steel plate (1-2) is internally welded with a horizontal corrugated steel plate inner cover plate (10-1) and a horizontal corrugated steel plate outer cover plate (10-2). The horizontal corrugated steel plate inner cover plate (10-1) and the horizontal corrugated steel plate outer cover plate (10-2) are on the same plane as the vertical steel plate (2-1), and the inner layer of the vertical corrugated steel plate (1-2) is aligned with the connection between the vertical steel plate (2-1). The three are connected by horizontal cover plate-vertical steel plate bolts (11) and cover plate-column bolts (20), respectively. Horizontal cover plate - vertical steel plate bolt (11), cover plate - column bolt (20) pass through the horizontal corrugated steel plate (1-1) and horizontal corrugated steel plate inner cover plate (10-1) and horizontal corrugated steel plate outer cover plate (10-2) set at both ends; The horizontal corrugated steel plate (1-1) is internally welded with a vertical corrugated steel plate inner cover plate (17-1) and a vertical corrugated steel plate outer cover plate (17-2). The corrugated steel plate inner cover plate (17-1) and the vertical corrugated steel plate outer cover plate (17-2) are on the same plane as the horizontal steel plate (2-2), and the connection between the inner layer of the horizontal corrugated steel plate (1-1) and the horizontal steel plate (2-2) is aligned. The three are connected by vertical cover plate-horizontal steel plate bolts (16) and cover plate-beam bolts (21), respectively. Vertical cover plate-horizontal steel plate bolt (16), vertical corrugated steel plate inner cover plate (17-1) passing through both ends of vertical corrugated steel plate (1-2), cover plate-beam bolt (21) passing through vertical corrugated steel plate outer cover plate (17-2).

6. The prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joint according to claim 1, characterized in that, The vertical corrugated steel plate (1-2) and the horizontal corrugated steel plate (1-1) are energy-consuming corrugated steel plates with trapezoidal cross sections, and rubber layer one (18) and rubber layer two (19) are arranged sequentially along the inner side of the trapezoidal cross section.

7. A prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joints according to claim 1, characterized in that, An iron ball (8) is welded above the horizontal steel plate (2-2), and a spherical groove (12) is opened at the bottom of the vertical steel plate (2-1). The iron ball (8) matches the spherical groove (12) to play a limiting role.

8. A method of using a prefabricated composite sector-shaped viscoelastic damper with replaceable beam-column joints according to any one of claims 1-7, characterized in that, Includes the following steps; When the vertical steel plate (2-1) and the horizontal steel plate (2-2) rotate, the fan-shaped sandwich steel plate slides; when the vertical steel plate (2-1) and the horizontal steel plate (2-2) deform significantly, the fan-shaped sandwich steel plate slides into the corrugated steel plate compartment of the horizontal corrugated steel plate (1-1) and the vertical corrugated steel plate (1-2); The horizontal corrugated steel plate (1-1) and the vertical corrugated steel plate (1-2) are trapezoidal cross-section corrugated steel plates. Cover plates are placed at both ends of the horizontal corrugated steel plate (1-1) and the vertical corrugated steel plate (1-2). The cover plates are connected to the steel plates and the embedded steel plates of the beams and columns by bolts. Under small deformation conditions, energy is dissipated by the sliding of the sector-shaped sandwich steel plate; Under large deformation conditions, the fan-shaped sandwich steel plate is completely inserted into the corrugated steel plate compartments of the horizontal corrugated steel plate (1-1) and the vertical corrugated steel plate (1-2), which acts as a metal damper. According to the principle of staged energy dissipation, the yielding energy of the horizontal corrugated steel plate (1-1) and the vertical corrugated steel plate (1-2) is used to dissipate energy. Rubber layer one (18) and rubber layer two (19) are arranged inside the horizontal corrugated steel plate (1-1) and the vertical corrugated steel plate (1-2) to prevent the corrugated steel plate from rapidly entering the plastic stage. The vertical steel plate (2-1) and the horizontal steel plate (2-2) are hinged together by a rotating shaft (7). The rotation of the rotating shaft (7) causes the fan-shaped sandwich steel plate to slide. The vertical steel plate groove (13) and the horizontal steel plate groove (15) generate frictional energy dissipation when the fan-shaped sandwich steel plate slides; an iron ball (8) is welded on the horizontal steel plate (2-2), and a spherical groove (12) is set at the bottom of the vertical steel plate (2-1). The spherical groove (12) is a hollow circular groove. When the fan-shaped sandwich steel plate deforms significantly, the vertical steel plate (2-1) and the horizontal steel plate (2-2) overlap vertically, and the iron ball (8) enters the spherical groove (12) to play a limiting role, restricting the vertical steel plate (2-1) and the horizontal steel plate (2-2) from continuing to rotate.

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