Assembled variable damping shock absorbing device and shock absorbing method, concrete frame node

Abstract

The invention discloses an assembled variable damping shock absorbing device and a shock absorbing method, and a concrete frame node, comprising a damper unit, a first connecting steel plate, a second connecting steel plate, a first viscoelastic material block and a second viscoelastic material block, wherein the damper unit comprises a plurality of self-resetting viscoelastic dampers connected in series, and both ends of the damper unit are respectively connected with force transmission units to form an assembled variable damping shock absorbing device, the first connecting steel plate and the second connecting steel plate are respectively connected to the ends of the two force transmission units, and the first connecting steel plate and the second connecting steel plate are respectively used to connect with the concrete frame node; in case of a small earthquake, the first annular viscoelastic material block is used to reduce shock and energy consumption, thereby reducing the dynamic response of the frame node; in case of a large earthquake, the energy-consuming components in the self-resetting viscoelastic damper are deformed at the same time to reduce shock and energy consumption together; the various components of the assembled variable damping shock absorbing device are connected in an assembled manner, which is helpful to promote the industrialized production and promotion of concrete frame nodes, and the on-site construction is convenient and flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of energy dissipation and shock absorption of assembled concrete structures, and in particular to an assembled variable damping shock absorption device and shock absorption method, and a concrete frame node. Background Art

[0002] Prefabricated concrete frame structures have been vigorously promoted in my country due to their advantages of high production efficiency, labor saving, low environmental pollution, and compliance with the requirements of sustainable development. However, the beam-column node area is often the most critical and weakest link in the prefabricated concrete frame structure. This area is prone to damage and destruction, resulting in serious degradation of the overall lateral bearing capacity of the structure, and even complete collapse. It is difficult to meet the seismic design requirements of "strong nodes and weak components" and difficult to repair after an earthquake. Therefore, how to improve the seismic performance and recoverability of prefabricated concrete frame nodes is an urgent problem to be solved.

[0003] Viscoelastic dampers have the advantages of simple structure, low cost, and good shock absorption effect, and have become one of the most popular structural shock absorption enhancement technologies. Traditional viscoelastic shock absorbers are usually made using an overall high-temperature and high-pressure vulcanization process, which can only provide fixed stiffness and damping performance and cannot be flexibly adjusted according to the stiffness and damping performance required by various types of prefabricated concrete frame nodes. As a result, the required specifications of shock absorbers vary greatly, and the required vulcanization boxes and molds are more diverse, with high economic costs, making it inconvenient for industrial production and promotion, and not conducive to flexible on-site construction.

[0004] However, the optimal damping force required for the prefabricated concrete frame nodes is different under different external excitations. At the same time, the existing viscoelastic shock absorbers are large in size, and the molding molds and high-temperature and high-pressure vulcanizers required in the processing and manufacturing process are both large in size. In addition, the reuse rate of the viscoelastic shock absorber molding mold is low, which easily leads to waste of resources, uneconomical processing and manufacturing, and complicated processing.

[0005] In summary, it is necessary to develop an assembled variable damping viscoelastic shock-absorbing concrete frame node and its seismic resistance method. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides an assembled variable damping shock absorbing device and a shock absorbing method, and a concrete frame node.

[0007] The present invention is achieved through the following technical solutions:

[0008] An assembled variable damping viscoelastic shock absorbing device comprises a damper unit composed of a plurality of self-resetting viscoelastic dampers connected in series, and energy dissipation structures are arranged at both ends of the damper unit, and the energy dissipation structures are used to connect beams and columns of concrete frame nodes;

[0009] The self-resetting viscoelastic damper comprises a housing, a piston plate, a piston rod, a third viscoelastic material block, a first spring, a first annular viscoelastic material block and a second spring;

[0010] The piston plate is radially arranged in the housing, one end of the piston rod is connected to the piston plate, and the other end extends out of the end of the housing, and the other end of the housing is provided with a connecting portion, and two adjacent self-resetting viscoelastic dampers, the piston rod of one self-resetting viscoelastic damper is connected to the connecting portion of the other self-resetting viscoelastic damper;

[0011] The first spring and the third viscoelastic material block are arranged on one side of the piston plate, and the first spring is located between the third viscoelastic material block and the piston plate, the second spring is arranged on the other side of the piston plate, the two ends of the second spring are respectively fixed to the shell and the piston plate, a first sleeve is arranged on the outside of the second spring, the first annular viscoelastic material block is arranged between the first sleeve and the side wall of the shell, a second annular viscoelastic material block is arranged at the lower end of the first annular viscoelastic material block, and the second annular viscoelastic material block is fixed to the inner end surface of the shell.

[0012] Preferably, the upper end of the first inner steel cylinder is connected to the piston plate, and a moving space is reserved between the lower end of the first inner steel cylinder and the bottom of the shell.

[0013] Preferably, the second annular viscoelastic material block is located at the bottom of the first inner steel cylinder.

[0014] Preferably, the end of the piston rod located outside the housing is provided with a thread, and the connecting portion is a threaded cap matched with the thread.

[0015] Preferably, a force transmission steel plate is arranged between the third viscoelastic material block and the first spring.

[0016] Preferably, both ends of the damper unit are respectively connected to force transmission units, the force transmission units are connected to the beam or column via a connecting steel plate, and the energy dissipation structure is arranged on the connecting steel plate.

[0017] Preferably, the energy dissipation structure is a second station elastic material block, one side of the connecting steel plate is connected to the force transmission unit, and the second station elastic material block is arranged on the other side of the connecting steel plate. When the connecting steel plate is connected to the beam or column, the energy dissipation structure is between the beam or column and the connecting steel plate.

[0018] Preferably, a groove is provided on one side of the connecting steel plate, and the second station elastic material block is bonded in the groove.

[0019] A shock absorbing method for an assembled variable damping viscoelastic shock absorbing device, when an assembled concrete frame node is subjected to a small earthquake and wind vibration, a self-resetting viscoelastic damper is displaced and deformed, and a first annular viscoelastic material block is shear-deformed to absorb shock and dissipate energy, thereby reducing the dynamic response of the frame node;

[0020] When the prefabricated concrete frame node is subjected to a large earthquake, the self-resetting viscoelastic damper is displaced and deformed, the first annular viscoelastic material block is sheared, the third viscoelastic material block is squeezed, the second annular viscoelastic material block is squeezed and deformed, and the energy-absorbing structure is squeezed and deformed to jointly reduce shock and energy, thereby reducing the dynamic response of the frame node. At the same time, the third viscoelastic material block and the second annular viscoelastic material block are squeezed and deformed to play a limiting role, thereby preventing or reducing shear damage to the first annular viscoelastic material block.

[0021] A shock-absorbing concrete frame node, comprising an assembled concrete frame node and a plurality of assembled variable damping viscoelastic shock-absorbing devices;

[0022] The prefabricated concrete frame node includes a prefabricated concrete beam and a prefabricated concrete column. An assembled variable damping viscoelastic shock absorbing device is respectively arranged before two adjacent prefabricated concrete beams and prefabricated concrete columns. The two adjacent assembled variable damping viscoelastic shock absorbing devices are symmetrically arranged on both sides of the prefabricated concrete beam or the prefabricated concrete column, and the ends of the two adjacent assembled variable damping viscoelastic shock absorbing devices that are close to each other are connected to each other through a connecting unit, so that the multiple assembled variable damping viscoelastic shock absorbing devices and the assembled concrete frame node form a closed self-resetting overall shock absorbing system.

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

[0024] The present invention provides an assembled variable damping shock absorbing device, comprising a damper unit composed of a plurality of self-resetting viscoelastic dampers connected in series, energy-absorbing structures being arranged at both ends of the damper unit, the energy-absorbing structures being used to connect the beams and columns of the concrete frame node, the magnitude of the damping force of the assembled variable damping shock absorbing device being realized by adjusting the number of assembled self-resetting viscoelastic dampers, and the damping force being adjusted by controlling the length of the connection part of two adjacent self-resetting viscoelastic dampers, and during small earthquakes, shock absorption and energy absorption are performed by the first annular viscoelastic material block to reduce the dynamic response of the frame node; during large earthquakes, the energy-absorbing components in the self-resetting viscoelastic damper are deformed simultaneously to jointly absorb shock absorption and energy absorption; the various components of the assembled variable damping shock absorbing device are connected in an assembled manner, which is helpful to promote the industrialized production and promotion of concrete frame nodes, and the on-site construction is convenient and flexible.

[0025] Furthermore, a threaded cap is provided at the end of the shell, and the overall damping force of the assembled variable damping viscoelastic shock absorbing device is adjusted by cooperatively adjusting the number of tightening threads of each threaded cap and the piston rod, and the force can be read in real time through the scale on the piston rod, which facilitates flexible and accurate adjustment and subsequent observation.

[0026] The present invention provides a concrete frame node, in which an assembled concrete frame node and a plurality of assembled variable damping viscoelastic shock absorbing devices are connected to form a closed self-resetting overall shock absorbing and enhancing system, which greatly enhances the integrity and stability of the shock absorbing and enhancing system, successfully transfers the damage in the beam-column node area to the beam area, greatly improves its energy dissipation and shock absorbing capacity and damage control effect, and enhances the seismic resistance and self-resetting ability of the node. The self-resetting overall shock absorbing and enhancing system has good shock absorbing and energy dissipation effects in both small earthquakes and wind vibrations, large earthquakes and strong winds. The self-resetting viscoelastic damper can provide a large elastic recovery stiffness during work, improves the recoverable capacity of the frame node, ensures that the node is easy to repair after an earthquake, effectively protects the beam-column node, ensures the seismic design requirements of "strong nodes and weak components", and greatly improves the seismic performance of assembled concrete frame nodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a front view of the overall structure of the assembled variable damping viscoelastic shock-absorbing concrete frame node of the present invention;

[0028] Figure 2 yes Figure 1 A front view of the self-resetting viscoelastic damper of the present invention;

[0029] Figure 3 yes Figure 1 A cross-sectional view of the outer steel cylinder, the cylindrical viscoelastic material block and the piston rod in the self-resetting viscoelastic damper of the present invention in the AA direction;

[0030] Figure 4 yes Figure 1 A BB-direction cross-sectional view of the outer steel cylinder, the first annular viscoelastic material block, the first inner steel cylinder and the second spring in the self-resetting viscoelastic damper of the present invention;

[0031] Figure 5 yes Figure 1 A CC-direction cross-sectional view of the outer steel cylinder, the second annular viscoelastic material block and the third inner steel cylinder in the self-resetting viscoelastic damper unit of the present invention;

[0032] Figure 6 is a front view of the first connecting steel plate of the present invention;

[0033] Figure 7 is a front view of the second connecting steel plate of the present invention;

[0034] Figure 8is a bottom side elevation view of the first connecting steel plate of the present invention;

[0035] Fig. 9 is a bottom side elevation view of the second connecting steel plate of the present invention;

[0036] Fig.10 is a front view of a first viscoelastic material block of the present invention;

[0037] Fig.11 is a front view of a second viscoelastic material block of the present invention;

[0038] In the figure: 1 self-resetting viscoelastic damper, 2 force transmission unit, 3 first connecting steel plate, 4 second connecting steel plate, 5 first viscoelastic material block, 6 second viscoelastic material block, 7 first connecting member unit, 8 second connecting member unit, 9 precast concrete column, 10 precast concrete beam, 11 piston rod, 12 upper sealing steel plate, 13 third viscoelastic material block, 14 shell, 15 force transmission steel plate, 16 first spring, 17 piston plate, 18 first inner steel cylinder, 19 second inner steel cylinder, 20 third inner steel cylinder, 21 second spring, 22 first annular viscoelastic material block, 23 second annular viscoelastic material block, 24 lower sealing steel plate, 25 threaded cap. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings, which are intended to explain the present invention rather than to limit it.

[0040] See also Figure 1-11 , an assembled variable damping viscoelastic shock absorbing device, comprising a damper unit, a first connecting steel plate 3, a second connecting steel plate 4, a first viscoelastic material block 5 and a second viscoelastic material block 6.

[0041] The damper unit includes a plurality of self-resetting viscoelastic dampers connected in series, and both ends of the damper unit are respectively connected to force transmission units 2 to form a self-resetting viscoelastic energy dissipation and shock absorbing support unit. The first connecting steel plate 3 and the second connecting steel plate 4 are respectively connected to the ends of the two force transmission units 2, and the first connecting steel plate 3 and the second connecting steel plate 4 are respectively used to connect to the concrete frame nodes.

[0042] The self-resetting viscoelastic damper 1 comprises a housing 14 , a piston plate 17 , a piston rod 11 , a third viscoelastic material block 13 , a first spring 16 , a first annular viscoelastic material block 22 and a second spring 21 .

[0043] The piston plate 17 is radially arranged in the shell 14, one end of the piston rod 11 is connected to the center of the piston plate 17, and the other end extends out of the end of the shell 14, and the other end of the shell 14 is provided with a connecting portion, the first spring 16 and the third viscoelastic material block 13 are arranged on one side of the piston plate 17, and the first spring 16 is located between the third viscoelastic material block 13 and the piston plate 17, the second spring 21 is arranged on the other side of the piston plate 17, the two ends of the second spring 21 are respectively fixed to the inner end surface of the shell and the piston plate 17, and the first annular viscoelastic material block 22 is located between the second spring 21 and the side wall bracket of the shell 14; two adjacent self-resetting viscoelastic dampers 1, wherein the piston rod of one of the self-resetting viscoelastic dampers 1 is connected to the connecting portion of the other self-resetting viscoelastic damper 1.

[0044] See also Figure 2-5 The shell 14 is a hollow cylindrical structure with closed ends. The third viscoelastic material block is a cylindrical structure with a through hole in the center for passing the piston rod. The upper side of the piston plate 17 is welded and fixed to one end of the piston rod 11. The first spring 16 is sleeved on the piston rod, one end of which abuts against the piston plate 17, and the other end is provided with a force transmission steel plate 15. The third viscoelastic material block is sleeved on the piston rod and is located between the top of the force transmission steel plate 15 and the inner end surface of the shell. The other end of the piston rod 11 extends to the end of the shell 14, and a scale is provided on the upper part of the piston rod 11.

[0045] A second inner steel cylinder 19 and a third inner steel cylinder 20 are fixedly arranged on the lower side of the piston plate 17 and the inner end surface of the lower end of the shell 14, respectively. The second inner steel cylinder 19 is provided with screw threads, and the second inner steel cylinder 19 is assembled and connected with the upper end of the second spring 21 through the screw threads, and the lower end of the second spring 21 is assembled and connected with the third inner steel cylinder 20 through the screw threads; a first inner steel cylinder 18 is also arranged on the lower side of the piston plate 17, and the upper end of the first inner steel cylinder 18 is fixedly connected to the piston plate 17, and a first annular viscoelastic material block 22 is arranged between the first inner steel cylinder 18 and the shell 14.

[0046] The shell 14 includes a cylinder, and an upper sealing steel plate 12 and a lower sealing steel plate 24 arranged at both ends. The upper end of the piston rod passes through the upper sealing steel plate, and the connecting part is arranged on the bottom surface of the lower sealing steel plate 24. The connecting part is a threaded cap 25 that matches the thread of the end of the piston rod. The third inner steel cylinder 20 is fixedly connected to the top surface of the lower sealing steel plate 24. The top surface of the lower sealing steel plate 24 has a second annular viscoelastic material block 23 of a certain thickness. For adjacent self-resetting viscoelastic dampers 1, the upper end of the piston rod of one damper unit is threadedly assembled with the threaded cap 25 at the lower end of another damper unit.

[0047] The force transmission unit 2 is a steel support or a shape memory composite support.

[0048] The second inner steel cylinder 19 has the same inner diameter and outer diameter as the third inner steel cylinder 20, and the spacing distance is 50mm to 100mm. The end face of the first inner steel cylinder 18 is 50mm to 100mm away from the second annular viscoelastic material block 23, and the end face of the second annular viscoelastic material block 23 is 40mm to 80mm away from the piston steel plate. The inner diameter of the first inner steel cylinder 18 is 40mm to 80mm larger than the outer diameter of the second inner steel cylinder 19.

[0049] The piston rod is a cylindrical steel rod, the diameter of the through hole in the middle of the third viscoelastic material block 13 is 3mm to 8mm larger than the diameter of the piston rod, the inner diameter of the shell 14 is 3mm to 8mm larger than the outer diameter of the third viscoelastic material block 13, and the third viscoelastic material block is not connected to the side wall of the shell.

[0050] The two sides of the first annular viscoelastic material block 22 are respectively connected to the outer wall of the first inner steel cylinder 18 and the inner wall of the shell 14 by high-temperature and high-pressure vulcanization or strong adhesive, and the second annular viscoelastic material block 23 is connected to the outer wall of the third inner steel cylinder 20, the inner wall of the shell 14, and the top surface of the lower sealing steel plate 24 by strong adhesive. The upper sealing steel plate, the lower sealing steel plate 24 are connected to the cylinder body by threaded assembly or welding.

[0051] The structures of the first connecting steel plate 3 and the second connecting steel plate 4 are the same. The outer sides of the first connecting steel plate 3 and the second connecting steel plate 4 are respectively provided with a first rectangular groove and a second rectangular groove. The first viscoelastic material block 5 and the second viscoelastic material block 6 are respectively embedded in the first rectangular groove and the second rectangular groove. Bolt holes are provided on the first connecting steel plate 3 and the second connecting steel plate 4, and the depth of the rectangular grooves is 10 mm to 30 mm.

[0052] A shock-absorbing concrete frame node comprises an assembled concrete frame node and a plurality of assembled variable damping viscoelastic shock-absorbing devices.

[0053] The assembled concrete frame node comprises a plurality of precast concrete beams and precast concrete columns, and an assembled variable damping viscoelastic shock absorbing device is respectively arranged before two adjacent precast concrete beams and precast concrete columns, and the two adjacent assembled variable damping viscoelastic shock absorbing devices are symmetrically arranged on both sides of the precast concrete beams or precast concrete columns, and the ends of the two adjacent assembled variable damping viscoelastic shock absorbing devices close to each other are connected to each other through a connecting unit, so that the plurality of assembled variable damping viscoelastic shock absorbing devices and the assembled concrete frame node form a closed self-resetting overall shock absorption enhancement system;

[0054] The precast concrete beams and precast concrete columns of the prefabricated concrete frame node are assembled and connected by dry connection or wet connection. The first viscoelastic material block 5 is arranged between the first connecting steel plate 3 and the precast concrete column, and the second viscoelastic material block 6 is arranged between the second connecting steel plate and the precast concrete beam.

[0055] The two first connecting steel plates located on both sides of the same precast concrete beam are assembled and connected through the first connecting member unit 7 , and the two second connecting steel plates located on both sides of the same precast concrete column are assembled and connected through the second connecting member unit 8 .

[0056] The first connector unit 7 and the second connector unit 8 are bolts with threads at one end or at both ends. The bolts pass through the connecting steel plate, the elastic material block and the prefabricated concrete column to connect the two assembled variable damping viscoelastic shock absorbing devices.

[0057] The anti-seismic method of the assembled variable damping viscoelastic shock absorbing device provided by the present invention is described in detail below.

[0058] (1) According to the design parameters and form of the prefabricated concrete frame node and the characteristics of the excitation by the external load, the magnitude, quantity, arrangement position and angle of the damping force required by the prefabricated variable damping viscoelastic shock absorbing device are determined, and the magnitude of the damping force of the self-resetting viscoelastic energy dissipation and shock absorbing support is achieved by flexibly adjusting the number of self-resetting viscoelastic dampers;

[0059] (2) The assembled variable damping viscoelastic shock-absorbing device is installed at the assembled concrete frame node to form a closed self-resetting overall shock-absorbing enhancement system, which greatly improves the node's seismic resistance and self-resetting ability;

[0060] (3) The preload of the self-resetting viscoelastic damper or the assembled variable damping viscoelastic shock absorbing device is flexibly adjusted by cooperatively adjusting the number of tightening threads of each threaded cap 25 and the piston rod, and is read in real time through the scale on the piston rod, so as to facilitate flexible and accurate adjustment and subsequent observation;

[0061] (4) When the assembled concrete frame node is subjected to small earthquakes and wind vibrations, the self-resetting viscoelastic damper undergoes small displacement deformation, and the shear deformation of the first annular viscoelastic material block 22 is mainly used to reduce shock and dissipate energy, thereby reducing the dynamic response of the frame node and preventing fatigue damage of the frame node;

[0062] When the assembled concrete frame node is subjected to a large earthquake and strong wind, the self-resetting viscoelastic damper 1 undergoes large displacement deformation, and the shear deformation of the first annular viscoelastic material block 22, the extrusion deformation of the third viscoelastic material block 13, the extrusion deformation of the second annular viscoelastic material block 23, the extrusion deformation of the first viscoelastic material block 5, and the extrusion deformation of the second viscoelastic material block 6 are used to jointly reduce shock and dissipate energy, thereby reducing the dynamic response of the frame node and preventing the frame node from being seriously damaged and failing. At the same time, the extrusion deformation of the third viscoelastic material block 13 and the second annular viscoelastic material block 23 can provide greater rigidity and play a limiting role, thereby ensuring that the first annular viscoelastic material block 22 does not suffer shear failure prematurely;

[0063] At the same time, the self-resetting viscoelastic damper 1 can provide a larger elastic recovery stiffness during operation, thereby improving the recoverability of the frame nodes and ensuring that the nodes are easy to repair after an earthquake.

[0064] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. An assembled variable damping viscoelastic shock absorbing device, characterized in that: A damper unit comprising a plurality of self-resetting viscoelastic dampers connected in series, with energy dissipation structures provided at both ends of the damper unit, the energy dissipation structures being used to connect beams and columns of concrete frame nodes; The self-resetting viscoelastic damper (1) comprises a housing (14), a piston plate (17), a piston rod (11), a third viscoelastic material block (13), a first spring (16), a first annular viscoelastic material block (22) and a second spring (21); The piston plate (17) is radially arranged in the housing (14); one end of the piston rod (11) is connected to the piston plate (17), and the other end extends out of the end of the housing (14); a scale is arranged on the piston rod; the other end of the housing (14) is provided with a connecting portion; and two adjacent self-resetting viscoelastic dampers (1), the piston rod of one self-resetting viscoelastic damper is connected to the connecting portion of the other self-resetting viscoelastic damper; The first spring (16) and the third viscoelastic material block (13) are arranged on one side of the piston plate (17), and the first spring (16) is located between the third viscoelastic material block (13) and the piston plate (17); the second spring (21) is arranged on the other side of the piston plate (17); two ends of the second spring (21) are respectively fixed to the housing and the piston plate (17); a first inner steel cylinder (18) is arranged outside the second spring (21); a first annular viscoelastic material block (22) is arranged between the first inner steel cylinder (18) and the side wall of the housing (14); a second annular viscoelastic material block (23) is arranged at the lower end of the first annular viscoelastic material block (22); and the second annular viscoelastic material block (23) is fixed to the inner end surface of the housing; The end of the piston rod located outside the housing is provided with a thread, and the connecting portion is a threaded cap (25) matched with the thread; Both ends of the damper unit are respectively connected to a force transmission unit (2), the force transmission unit (2) is connected to a beam or a column via a connecting steel plate, and the energy dissipation structure is arranged on the connecting steel plate; The energy dissipation structure is a second viscoelastic material block, one side of the connecting steel plate is connected to the force transmission unit, and the second viscoelastic material block is arranged on the other side of the connecting steel plate. When the connecting steel plate is connected to the beam or column, the energy dissipation structure is between the beam or column and the connecting steel plate; The upper end of the first inner steel cylinder (18) is connected to the piston plate (17), and a moving space is reserved between the lower end of the first inner steel cylinder (18) and the bottom of the housing (14); A force transmission steel plate (15) is provided between the third viscoelastic material block and the first spring (16).

2. The assembled variable damping viscoelastic shock absorbing device according to claim 1, characterized in that: The second annular viscoelastic material block is located at the bottom of the first inner steel cylinder (18).

3. The assembled variable damping viscoelastic shock absorbing device according to claim 1, characterized in that: A groove is provided on one side of the connecting steel plate, and the second viscoelastic material block is bonded in the groove.

4. A shock absorbing method for an assembled variable damping viscoelastic shock absorbing device according to any one of claims 1 to 3, characterized in that: When the assembled concrete frame node is subjected to small earthquakes and wind vibrations, the self-resetting viscoelastic damper is displaced and deformed, and the first annular viscoelastic material block is shear-deformed to reduce shock and energy consumption, thereby reducing the dynamic response of the frame node; When the assembled concrete frame node is subjected to a large earthquake, the self-resetting viscoelastic damper is displaced and deformed, the first annular viscoelastic material block is sheared, the third viscoelastic material block (13) is squeezed, the second annular viscoelastic material block is squeezed, and the energy dissipation structure is squeezed to jointly reduce shock and dissipate energy, thereby reducing the dynamic response of the frame node. At the same time, the third viscoelastic material block and the second annular viscoelastic material block are squeezed and deformed to play a limiting role, thereby preventing or reducing shear damage to the first annular viscoelastic material block.

5. A shock-absorbing concrete frame node, characterized in that: It comprises an assembled concrete frame node and a plurality of assembled variable damping viscoelastic shock absorbing devices according to any one of claims 1 to 3; The prefabricated concrete frame node includes a prefabricated concrete beam and a prefabricated concrete column. An assembled variable damping viscoelastic shock absorbing device is respectively arranged before two adjacent prefabricated concrete beams and prefabricated concrete columns. The two adjacent assembled variable damping viscoelastic shock absorbing devices are symmetrically arranged on both sides of the prefabricated concrete beam or the prefabricated concrete column, and the ends of the two adjacent assembled variable damping viscoelastic shock absorbing devices close to each other are connected to each other through a connecting unit, so that the multiple assembled variable damping viscoelastic shock absorbing devices and the assembled concrete frame node form a closed self-resetting overall shock absorbing system.

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