Friction slippage three-dimensional shock insulation support

Abstract

The invention discloses a friction sliding three-dimensional shock insulation support which comprises an upper cover plate, a lower cover plate and a sliding shock insulation unit, and the upper cover plate is fixedly connected with an upper structure; the lower cover plate is oppositely arranged below the upper cover plate and is fixedly connected with the lower structure; the vertical bearing capacity of the sliding shock insulation unit is large, the vertical rigidity is small, and the sliding shock insulation unit can be used for vertical shock insulation; the sliding vibration isolation unit can slide between the upper cover plate and the lower cover plate, and horizontal vibration isolation can be achieved. The angle of the sliding shock insulation unit can be automatically adjusted, and the upper cover plate is kept parallel to the lower cover plate. When vibration is small, the sliding vibration isolation units absorb vibration energy through internal self-adjusting sliding, after the vibration is gradually increased, the sliding vibration isolation units move relative to the upper cover plate and the lower cover plate, and the vibration energy is consumed in a sliding friction mode for the second time; the friction sliding three-dimensional shock insulation support can flexibly adapt to shock of different degrees, and is good in shock insulation effect, low in manufacturing cost, simple in structure and convenient to construct.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering structures, and in particular to a friction sliding three-dimensional seismic isolation bearing. Background Art

[0002] Earthquakes are a natural disaster with serious destructive effects. The vibrations they produce can affect the stability of buildings. During the propagation of earthquake waves, not only horizontal ground movement is generated, but also significant vertical seismic forces. This multi-directional earthquake action can cause serious damage to building structures, endangering the safety of building use.

[0003] The traditional seismic isolation technology widely used in engineering projects is mainly achieved by setting up seismic isolation devices between the building foundation and the superstructure. Common seismic isolation devices include rubber seismic isolation bearings and three-dimensional seismic isolation bearings. Among them, it is difficult to take into account both the vertical bearing capacity and the horizontal deformation capacity of rubber seismic isolation bearings. If the vertical bearing capacity of rubber is to be increased, its hardness needs to be increased, which will lead to a decrease in the horizontal seismic isolation effect. In addition, rubber is greatly affected by temperature and is prone to aging and creep after long-term use, which affects the seismic isolation effect. Although the common three-dimensional seismic isolation bearings can slide in the horizontal direction, their design focus is mainly on maintaining the balance of the upper and lower structures. Moreover, their horizontal sliding only consumes energy for the first-level sliding, and consumes less energy for horizontal vibration, so the seismic isolation effect needs to be improved. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a friction sliding three-dimensional seismic isolation bearing that can achieve seismic isolation in both horizontal and vertical directions. It uses two-level sliding friction in the horizontal direction to absorb vibration energy, and can flexibly adapt to different degrees of vibration while maintaining the stability of the upper and lower structures of the building. It has good seismic isolation effect, low cost, simple structure and convenient construction.

[0005] The technical solution adopted by the present invention is: a friction sliding three-dimensional seismic isolation bearing, characterized in that it includes:

[0006] An upper cover plate, wherein the upper cover plate is fixedly connected to the upper structure, and the lower end surface of the upper cover plate is a first sliding friction surface, and the first sliding friction surface is a plane;

[0007] A lower cover plate, the lower cover plate is fixedly connected to the lower structure, and the lower cover plate is located below the upper cover plate and is arranged opposite to the upper cover plate, the upper end surface of the lower cover plate is a second sliding friction surface, and the second sliding friction surface is a plane;

[0008] A sliding seismic isolation unit is arranged between the upper cover plate and the lower cover plate. The sliding seismic isolation unit has a large vertical bearing capacity and a small vertical stiffness, so that the vertical natural vibration period of the three-dimensional seismic isolation support is long and the natural frequency is low, thereby realizing vertical seismic isolation. The sliding seismic isolation unit can be relatively slidably adapted to the first sliding friction surface and the second sliding friction surface at the same time, and the friction coefficients between the sliding seismic isolation unit and the first friction surface and the second friction surface are different. The sliding seismic isolation unit can automatically adjust the angle during vibration so that the first friction surface and the second friction surface always remain parallel.

[0009] According to the above technical solution, the sliding seismic isolation unit includes an upper slider, a lower slider and a slider assembly; the upper slider is provided with a first horizontal surface and a first convex spherical surface, the first horizontal surface is snugly matched with the first sliding friction surface and can slide relatively, and the first convex spherical surface faces downward; the lower slider is provided with a second horizontal surface and a second convex spherical surface, the second horizontal surface is snugly matched with the second sliding friction surface and can slide relatively, and the second convex spherical surface faces upward and is arranged opposite to the first convex spherical surface; the slider assembly is arranged between the upper slider and the lower slider, and the slider assembly can slide relative to the upper slider and the lower slider.

[0010] According to the above technical solution, the slider assembly includes an upper connecting block, a lower connecting block and an elastic support member; the upper connecting block is provided with a first groove on the upper end surface, and the upper connecting block is provided with a first concave spherical surface and a third horizontal surface, the first concave spherical surface is upward, and can be relatively slidably adapted to fit with the first convex spherical surface; the lower connecting block is provided with a second groove on the lower end surface, and the lower connecting plate is provided with a second concave spherical surface and a fourth horizontal surface, the second concave spherical surface is downward, and can be relatively slidably adapted to fit with the second convex spherical surface, and the third horizontal surface and the fourth horizontal surface are arranged parallel to each other; the elastic support assembly is arranged vertically and is located between the upper connecting block and the lower connecting block.

[0011] According to the above technical solution, the radius of curvature of the first convex spherical surface is the same as the radius of curvature of the first concave spherical surface, and the area of ​​the first convex spherical surface is smaller than the area of ​​the first concave spherical surface; the radius of curvature of the second convex spherical surface is the same as the radius of curvature of the second concave spherical surface, and the area of ​​the second convex spherical surface is smaller than the area of ​​the second concave spherical surface.

[0012] According to the above technical solution, the friction coefficient between the first sliding friction surface and the first horizontal plane is K1, the friction coefficient between the second sliding friction surface and the second horizontal plane is K2, the friction coefficient between the first convex spherical surface and the first concave spherical surface is K3, and the friction coefficient between the second convex spherical surface and the second concave spherical surface is K4; the friction coefficients K1 and K2 are different, and K1 and K2 are greater than K3 and K4.

[0013] According to the above technical solution, the magnitudes of the friction coefficients K1, K2, K3, and K4 are controlled by arranging friction materials on the friction surfaces at the joints. Optional friction materials include polytetrafluoroethylene, molybdenum disulfide, and tungsten dioxide.

[0014] According to the above technical solution, sleeves are provided outside the upper connecting block and the lower connecting block, and the sleeves enclose the elastic support member between the upper connecting block and the lower connecting block.

[0015] According to the above technical solution, a first anti-separation baffle is fixed on the upper connecting block, and the first anti-separation baffle surrounds the periphery of the first groove to limit the upper slider; a second anti-separation baffle is fixed on the lower connecting block, and the second anti-separation baffle surrounds the periphery of the second groove to limit the lower slider.

[0016] According to the above technical solution, a plurality of elastic support members are provided, and the upper ends and lower ends of the plurality of elastic support members are in contact with the third horizontal plane and the fourth horizontal plane respectively, and are evenly arranged in a ring array.

[0017] The beneficial effects achieved by the present invention include:

[0018] (1) The friction sliding three-dimensional seismic isolation bearing of the present invention mainly includes an upper cover plate, a lower cover plate and a sliding seismic isolation unit. The sliding seismic isolation unit has a large vertical bearing capacity and a small vertical stiffness, so that its vertical natural vibration period is long and its natural frequency is low, and the vertical seismic isolation effect can be achieved; when the vibration is small, the sliding between the upper slider and the upper connecting plate, and the sliding between the lower slider and the lower connecting plate absorbs the vibration energy, while keeping the upper cover plate and the lower cover plate parallel; after the vibration gradually increases, the sliding seismic isolation unit moves relative to the upper cover plate and the lower cover plate, and the vibration energy is consumed for the second time in the form of sliding friction. The friction sliding three-dimensional seismic isolation bearing of the present invention can flexibly adapt to different degrees of vibration, has good seismic isolation effect, low cost, simple structure and convenient construction.

[0019] (2) The number of vertical elastic support members can be flexibly changed. According to the actual needs of the building structure in the actual project, the bearing capacity and vertical stiffness of the friction sliding three-dimensional seismic isolation bearing can be adjusted, which can not only meet the bearing capacity under different vibration conditions, but also optimize the vertical seismic isolation effect of the bearing. At the same time, the synergistic effect of multiple elastic support members can provide a more stable support effect and maintain the stability of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top view of the structure of a friction sliding three-dimensional seismic isolation bearing provided by an embodiment of the present invention;

[0021] Figure 2It is a schematic diagram of the elevation structure of a friction sliding three-dimensional seismic isolation bearing provided by an embodiment of the present invention;

[0022] Figure 3 A friction sliding three-dimensional seismic isolation support provided by an embodiment of the present invention Figure 1 Schematic diagram of the EE cross-section structure;

[0023] Figure 4 It is a structural schematic diagram of an upper slider and a lower slider of a friction sliding three-dimensional seismic isolation support provided by an embodiment of the present invention;

[0024] Figure 5 It is a structural schematic diagram of an upper connecting block, a lower connecting block and an elastic supporting member of a slider assembly of a friction sliding three-dimensional seismic isolation bearing provided by an embodiment of the present invention;

[0025] Figure 6 It is a schematic diagram of the planar layout of an elastic support member of a friction sliding three-dimensional seismic isolation bearing provided by an embodiment of the present invention;

[0026] In the figure: 1, upper cover plate; 11, first sliding friction surface; 2, lower cover plate; 21, second sliding friction surface; 3, upper slider; 31, first horizontal plane; 32, first convex spherical surface; 4, lower slider; 41, second horizontal plane; 42, second convex spherical surface; 5, slider assembly; 51, upper connecting block; 511, first groove; 512, first concave spherical surface; 513, third horizontal plane; 514, first anti-separation baffle; 52, lower connecting block; 521, second groove; 522, second concave spherical surface; 523, fourth horizontal plane; 524, second anti-separation baffle; 53, disc spring; 6, sleeve; 7, upper structure; 8, lower structure. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] like Figures 1 to 6 As shown, a friction sliding three-dimensional seismic isolation support according to an embodiment of the present invention includes an upper cover plate 1, a lower cover plate 2 and a sliding seismic isolation unit, wherein the upper cover plate 1 is fixedly connected to the upper structure 7, and the lower end surface of the upper cover plate 1 is a first sliding friction surface 11, and the first sliding friction surface 11 is a plane; the lower cover plate 2 is fixedly connected to the lower structure 8, and the lower cover plate 2 is located below the upper cover plate 1 and is arranged opposite to the upper cover plate 1, and the upper end surface of the lower cover plate 2 is a second sliding friction surface 21, and the second sliding friction surface 21 is a plane; the sliding seismic isolation unit, the sliding seismic isolation unit is Located between the upper cover plate 1 and the lower cover plate 2, the sliding seismic isolation unit has a large vertical bearing capacity and a small vertical stiffness, so that the vertical natural vibration period of the three-dimensional seismic isolation support is long and the natural frequency is low, and vertical seismic isolation can be achieved; the sliding seismic isolation unit can be relatively slidably adapted to the first sliding friction surface 11 and the second sliding friction surface 21 at the same time, and the friction coefficients between the sliding seismic isolation unit and the first friction surface and the second friction surface are different; the sliding seismic isolation unit can automatically adjust the angle during vibration so that the first friction surface and the second friction surface always remain parallel.

[0030] In this embodiment, the upper cover plate 1 and the lower cover plate 2 are in the shape of an oblate cylinder. The upper end surface of the upper cover plate 1 is tightly fitted with the upper structure 7, and is fixed to the upper structure 7 by bolts of the sleeve 6 penetrating the upper cover plate 1. The lower end surface of the upper cover plate 1 is a first sliding friction surface 11; the lower cover plate 2 is located below the upper cover plate 1 and is arranged opposite to the upper cover plate 1. The lower end surface of the lower cover plate 2 is tightly fitted with the lower structure 8, and is fixed to the lower structure 8 by bolts of the sleeve 6 penetrating the lower cover plate 2. The upper end surface of the lower cover plate 2 is a second sliding friction surface 21. The sliding isolation unit is arranged between the upper cover plate 1 and the lower cover plate 2, and can be relatively slidably adapted to fit with the first sliding friction surface 11 and the second sliding friction surface 21. The sliding isolation unit can slide between the upper cover plate 1 and the lower cover plate 2, so that the horizontal stiffness of the friction sliding three-dimensional isolation support is small. When the vibration is transmitted to the structure, the upper structure 7 is allowed to be horizontally displaced relative to the lower structure 8. At the same time, the friction sliding between the sliding isolation unit and the upper cover plate 1 and the lower cover plate 2 consumes the vibration energy in the horizontal direction, thereby achieving the isolation effect. The sliding isolation unit can automatically adjust the angle during vibration so that the first friction surface and the second friction surface always remain parallel.

[0031] In this embodiment, the sliding isolation unit includes an upper slider 3, a lower slider 4 and a slider assembly 5; the upper slider 3 is arranged opposite to the lower slider 4, the top of the upper slider 3 is a first horizontal surface 31, which can be relatively slidably adapted to fit with the first sliding friction surface 11 of the upper cover plate 1, and the bottom of the upper slider 3 is a first convex spherical surface 32; the bottom of the lower slider 4 is a second horizontal surface 41, which can be relatively slidably adapted to fit with the second sliding friction surface 21 of the lower cover plate 2, and the top of the lower slider 4 is a second convex spherical surface 42, which is arranged opposite to the first convex spherical surface 32; the slider assembly 5 is arranged between the upper slider 3 and the lower slider 4, and the slider assembly 5 can slide relative to the upper slider 3 and the lower slider 4. The slider assembly 5 has a large vertical bearing capacity and a small vertical stiffness, and can achieve a vertical isolation effect.

[0032] In this embodiment, the slider assembly 5 includes an upper connecting block 51, a lower connecting block 52 and an elastic support member; the upper connecting block 51 and the lower connecting block 52 are in the shape of an oblate cylinder with a circular groove, the upper connecting block 51 is provided with a first groove 511 on the upper end surface, the top of the upper connecting block 51 is a first concave spherical surface 512, which can be relatively slidably adapted to the first convex spherical surface 32 at the bottom of the upper slider 3, and the bottom of the upper connecting block 51 is a third horizontal plane 513; the lower connecting block 52 is provided with a second groove 521 on the lower end surface, the bottom of the lower connecting block 52 is a second concave spherical surface 522, which can be relatively slidably adapted to the second convex spherical surface 42 at the top of the lower slider 4, and the top of the lower connecting block 52 is a fourth horizontal plane 523; the elastic support member is arranged between the upper connecting block 51 and the lower connecting block 52, is arranged vertically, and contacts the third horizontal plane 513 and the fourth horizontal plane 523. When vibration is transmitted to the structure, the elastic support is deformed to absorb vibration energy to achieve a seismic isolation effect. In addition, the upper slider 3 and the upper connecting block 51 slide relative to each other in the first groove 511, and the lower slider 4 and the lower connecting block 52 slide relative to each other in the second groove 521. The positions of the upper slider 3 and the lower slider 4 are automatically adjusted to keep the upper slider 3 and the lower slider 4 always parallel, thereby keeping the upper structure 7 and the lower structure 8 of the building relatively stable.

[0033] In this embodiment, the radius of curvature of the first convex spherical surface 32 is the same as the radius of curvature of the first concave spherical surface 512, and the area of ​​the first convex spherical surface 32 is smaller than the area of ​​the first concave spherical surface 512; the radius of curvature of the second convex spherical surface 42 is the same as the radius of curvature of the second concave spherical surface 522, and the area of ​​the second convex spherical surface 42 is smaller than the area of ​​the second concave spherical surface 522. Therefore, the first convex spherical surface 32 can fit tightly in the first concave spherical surface 512 and slide in the first concave spherical surface 512; the second convex spherical surface 42 can fit tightly in the second concave spherical surface 522 and slide in the second concave spherical surface 522. It can not only absorb the vibration energy in the horizontal direction and realize horizontal seismic isolation, but also automatically adjust the positions of the upper slider 3 and the lower slider 4 to keep the upper slider 3 and the lower slider 4 always parallel.

[0034] In this embodiment, the friction coefficient between the first sliding friction surface 11 and the first horizontal surface 31 is K1, the friction coefficient between the second sliding friction surface 21 and the second horizontal surface 41 is K2, the friction coefficient between the first convex spherical surface 32 and the first concave spherical surface 512 is K3, and the friction coefficient between the second convex spherical surface 42 and the second concave spherical surface 522 is K4; wherein, the friction coefficients K1 and K2 are different, and K1 and K2 are greater than K3 and K4. The purpose of the friction coefficients K1 and K2 being greater than K3 and K4 is that when the vibration is small, there is no friction slip between the sliding isolation unit and the upper cover plate 1 and the lower cover plate 2, and its static friction force can keep the upper structure 7 and the lower structure 8 stable. At this time, the horizontal vibration energy is absorbed by the relative sliding between the upper slider 3 and the upper connecting block 51, the lower slider 4 and the lower connecting block 52, and the deformation of the elastic support absorbs the vertical vibration energy, thereby achieving the purpose of three-dimensional isolation. The purpose of the different friction coefficients K1 and K2 is that when the vibration is large, the relative sliding between the upper slider 3 and the upper connecting block 51, and the lower slider 4 and the lower connecting block 52 is insufficient to completely absorb the vibration energy, and the sliding isolation unit will have friction and slip with one of the upper cover plates 1 and the lower cover plate 2, thereby achieving the purpose of absorbing the vibration energy for the second time while maintaining the overall stability of the structure, and ultimately obtaining a better isolation effect.

[0035] In this embodiment, the friction coefficients K1, K2, K3 and K4 can be controlled by setting friction materials on the first sliding friction surface 11, the first horizontal surface 31, the second sliding friction surface 21, the second horizontal surface 41, the first convex spherical surface 32, the first concave spherical surface 512, the second convex spherical surface 42 and the second concave spherical surface 522. The friction materials can be selected from polytetrafluoroethylene, molybdenum disulfide and tungsten dioxide, etc., but these are only preferred example materials, and other materials with the same function can also be selected.

[0036] In this embodiment, a sleeve 6 is provided on the outer periphery of the upper connecting block 51 and the lower connecting block 52, and the sleeve 6 is fixedly connected to the upper connecting block 51 and the lower connecting block 52 by anchor bolts; the sleeve 6 is cylindrical, and the inner diameter of the sleeve 6 is slightly larger than the outer diameter of the upper connecting block 51 and the lower connecting block 52, so that it can completely cover the outer peripheral surface of the upper connecting block 51 and the lower connecting block 52; the sleeve 6 encloses the elastic support member inside, which can effectively prevent the elastic support member from falling off, and can also prevent the external environment from affecting the elastic support member, while maintaining the stability of the entire structure;

[0037] In this embodiment, a first anti-separation baffle 514 is fixed to the upper connection block 51. The first anti-separation baffle 514 is an annular structure and surrounds the periphery of the first groove 511. The first anti-separation baffle 514 extends into the first groove 511 and can limit the displacement of the upper slider 3 to prevent the upper slider 3 from sliding out of the first groove 511. A second anti-separation baffle 524 is fixed to the lower connection block 52. The second anti-separation baffle 524 is also an annular structure and surrounds the periphery of the second groove 521. It can limit the displacement of the lower slider 4 to prevent the lower slider 4 from sliding out of the second groove 521. The first anti-separation baffle 514 and the second anti-separation baffle 524 can be fixed to the upper connection block 51 and the lower connection block 52 by welding or bolts.

[0038] In this embodiment, the elastic support member is a disc spring 53, which has a large elastic deformation capacity and load-bearing capacity, and its unique nonlinear mechanical characteristics can effectively absorb and dissipate earthquake energy, and play a role in seismic isolation. A plurality of disc springs 53 are provided, and the upper and lower ends of the plurality of disc springs 53 are respectively in contact with the third horizontal plane 513 and the fourth horizontal plane 523, and are evenly arranged in a circular array. The specific number and size of the disc springs 53 can be selected and adjusted according to the actual seismic isolation requirements, and can flexibly adapt to various vibration environments.

[0039] In this embodiment, when the vibration is small, friction slip occurs between the upper slider 3 and the upper connecting plate, and between the lower slider 4 and the lower connecting plate, absorbing the vibration energy in the horizontal direction, and the disc spring 53 deforms to absorb the vibration energy in the vertical direction, and automatically adjusts the position of the upper slider 3 and the lower slider 4 at the same time, keeping the entire friction slip three-dimensional seismic isolation support stable. When the vibration gradually increases, the friction slip between the upper slider 3 and the upper connecting plate, and between the lower slider 4 and the lower connecting plate cannot completely absorb the vibration energy, and friction slip occurs between the upper slider 3 and the upper cover plate 1, and between the lower slider 4 and the lower cover plate 2, absorbing the vibration energy for the second time, and cooperating with the disc spring 53 to achieve a three-dimensional seismic isolation effect; at the same time, through the friction slip between the upper slider 3 and the upper connecting plate, and between the lower slider 4 and the lower connecting plate, the first sliding friction surface 11 and the second sliding friction surface 21 are kept parallel when the vibration is large, and the upper structure 7 and the lower structure 8 of the building are stable.

[0040] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A friction sliding three-dimensional seismic isolation bearing, characterized in that: include: An upper cover plate, wherein the upper cover plate is fixedly connected to the upper structure, and the lower end surface of the upper cover plate is a first sliding friction surface, and the first sliding friction surface is a plane; A lower cover plate, the lower cover plate is fixedly connected to the lower structure, and the lower cover plate is located below the upper cover plate and is arranged opposite to the upper cover plate, the upper end surface of the lower cover plate is a second sliding friction surface, and the second sliding friction surface is a plane; A sliding seismic isolation unit, wherein the sliding seismic isolation unit is arranged between the upper cover plate and the lower cover plate, and the sliding seismic isolation unit has a large vertical bearing capacity and a small vertical stiffness, so that the vertical natural vibration period of the three-dimensional seismic isolation support is long and the natural frequency is low, and vertical seismic isolation can be achieved; the sliding seismic isolation unit can be relatively slidably adapted to the first sliding friction surface and the second sliding friction surface at the same time, and the friction coefficients between the sliding seismic isolation unit and the first friction surface and the second friction surface are different; The sliding isolation unit can automatically adjust its angle during vibration so that the first friction surface and the second friction surface always remain parallel.

2. The friction sliding three-dimensional seismic isolation bearing according to claim 1, characterized in that: The sliding isolation unit includes an upper slider, a lower slider and a slider assembly; the upper slider is provided with a first horizontal surface and a first convex spherical surface, the first horizontal surface fits closely with the first sliding friction surface and can slide relatively, and the first convex spherical surface faces downward; the lower slider is provided with a second horizontal surface and a second convex spherical surface, the second horizontal surface fits closely with the second sliding friction surface and can slide relatively, and the second convex spherical surface faces upward and is arranged opposite to the first convex spherical surface; the slider assembly is arranged between the upper slider and the lower slider, and the slider assembly can slide relative to the upper slider and the lower slider.

3. The friction sliding three-dimensional seismic isolation bearing according to claim 2 is characterized in that: The slider assembly includes an upper connecting block, a lower connecting block and an elastic support member; the upper connecting block is provided with a first groove on the upper end surface, and the upper connecting block is provided with a first concave spherical surface and a third horizontal surface, the first concave spherical surface faces upward and can be relatively slidably adapted to fit with the first convex spherical surface; the lower connecting block is provided with a second groove on the lower end surface, and the lower connecting plate is provided with a second concave spherical surface and a fourth horizontal surface, the second concave spherical surface faces downward and can be relatively slidably adapted to fit with the second convex spherical surface, and the third horizontal surface and the fourth horizontal surface are arranged parallel to each other; the elastic support assembly is arranged vertically and is located between the upper connecting block and the lower connecting block.

4. The friction sliding three-dimensional seismic isolation bearing according to claim 3 is characterized in that: The curvature radius of the first convex spherical surface is the same as the curvature radius of the first concave spherical surface, and the area of ​​the first convex spherical surface is smaller than the area of ​​the first concave spherical surface; the curvature radius of the second convex spherical surface is the same as the curvature radius of the second concave spherical surface, and the area of ​​the second convex spherical surface is smaller than the area of ​​the second concave spherical surface.

5. The friction sliding three-dimensional seismic isolation bearing according to claim 2, characterized in that: The friction coefficient between the first sliding friction surface and the first horizontal plane is K1, the friction coefficient between the second sliding friction surface and the second horizontal plane is K2, the friction coefficient between the first convex spherical surface and the first concave spherical surface is K3, and the friction coefficient between the second convex spherical surface and the second concave spherical surface is K4; The friction coefficients K1 and K2 are different, and K1 and K2 are greater than K3 and K4.

6. The friction sliding three-dimensional seismic isolation bearing according to claim 5, characterized in that: The magnitudes of the friction coefficients K1, K2, K3, and K4 are controlled by arranging friction materials on the friction surfaces at the joints. Optional friction materials include polytetrafluoroethylene, molybdenum disulfide, and tungsten dioxide.

7. The friction sliding three-dimensional seismic isolation bearing according to claim 3 is characterized in that: Sleeves are provided outside the upper connecting block and the lower connecting block, and the sleeves enclose the elastic supporting member between the upper connecting block and the lower connecting block.

8. The friction sliding three-dimensional seismic isolation bearing according to claim 3 is characterized by: A first anti-separation baffle is fixed on the upper connecting block, and the first anti-separation baffle surrounds the periphery of the first groove to limit the upper slider; a second anti-separation baffle is fixed on the lower connecting block, and the second anti-separation baffle surrounds the periphery of the second groove to limit the lower slider.

9. The friction sliding three-dimensional seismic isolation bearing according to claim 3 is characterized by: There are multiple elastic support members, and the upper ends and lower ends of the multiple elastic support members are in contact with the third horizontal plane and the fourth horizontal plane respectively, and are evenly arranged in a ring array.

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