Functional friction pendulum seismic isolation bearing

Abstract

The utility model discloses a function type friction pendulum seismic isolation support for satisfying structure vertical vibration isolation and horizontal seismic isolation double demand. The support is constituted by upper sliding plate, lower sliding plate, spherical crown body, flexible pad, baffle ring subassembly and U type soft steel. Under the daily state, flexible pad passes through the adjustment vertical self -vibration frequency and separates the outside vibration impact, and when the earthquake effect is small, baffle ring subassembly restricts upper and lower sliding plate relative horizontal motion, and only flexible pad appears small -scale horizontal deformation, when the earthquake effect is big, exceeds the fixed bolt strength of baffle piece, and baffle piece and upper sliding plate are separated, and friction pendulum mechanism starts, and relieves the earthquake impact through the spherical surface relative sliding, and dissipates energy by using friction damping, and U type soft steel provides additional damping force and spacing effect simultaneously with plastic deformation. The support solves the problem that the traditional support vertical and horizontal rigidity is not coordinated, realizes the phased accurate control of vibration and earthquake, and is suitable for complex scenes such as rail transit upper cover building.

Description

Technical Field

[0001] This utility model belongs to the field of vibration and shock control technology, and relates to the improvement of friction pendulum isolation bearing technology, specifically a functional friction pendulum isolation bearing. Background Technology

[0002] In the field of modern building seismic resistance, friction pendulum isolation bearings, with their "flexible yet strong" mechanical properties, have become the mainstream seismic isolation solution for major projects such as high-rise buildings and bridges. Their core principle is to extend the natural period of the structure through a spherical sliding interface and dissipate seismic energy using frictional damping, thereby reducing the seismic response of the superstructure by 50%-70%. However, with the increasing complexity of building functions, especially in scenarios such as rail transit superstructures and precision laboratories, a dual requirement has been placed on the bearings: vertical isolation from environmental vibrations (such as subway vibrations) and horizontal isolation from ground motion.

[0003] Friction pendulum seismic isolation bearings, as an advanced seismic isolation technology, have been widely used in important building structures such as high-rise buildings and bridges due to their unique working principle and significant advantages. In recent years, due to the functional requirements of structures in different service processes, friction pendulum seismic isolation also needs to isolate environmental vibrations, which presents another significant challenge for researchers in the seismic isolation industry. Traditional friction pendulum bearings are designed only for horizontal earthquakes, while rail transit vibrations are characterized by high frequency and small displacement. Existing technologies attempt to connect helical springs and friction pendulums in series, but this presents two major contradictions: the friction pendulum's bearing area is only 20% of that of the helical spring, resulting in a lack of coordination between vertical and horizontal stiffness; horizontal sliding causes a shift in the vertical force center, leading to uneven deformation of the spring bearing and compromising the periodic stability of the friction pendulum. These coupling problems result in vibration reduction efficiency of less than 30% for dual-control bearings in practical applications, and they are prone to bearing tilting and stress concentration at the contact surface. Low stiffness is required for vertical vibration isolation during routine use, while high stiffness is needed to prevent excessive vertical displacement during rare earthquakes. Existing variable stiffness designs have excessively high stiffness at small displacements, resulting in poor vibration isolation in subway systems, and the smoothness of multi-stage stiffness switching is difficult to guarantee. Summary of the Invention

[0004] To address the shortcomings and difficulties of existing technologies, the inventors, through research and innovative design, proposed a functional friction pendulum seismic isolation bearing, suitable for structures requiring both vertical and horizontal vibration isolation. Under normal conditions, it provides vertical isolation from environmental vibrations. By incorporating an activation mechanism, the device does not produce a seismic isolation effect during frequent, designed earthquakes, but enters isolation mode during rare earthquakes. Simultaneously, it dissipates seismic energy through frictional damping and plastic damping. Specifically, this invention achieves the following: A functional friction pendulum vibration isolation bearing includes an upper sliding plate connected to an upper structure, a lower sliding plate connected to a lower structure, concave spherical surfaces on opposite sides of the upper and lower sliding plates, a spherical cap located between the concave spherical surfaces of the upper and lower sliding plates, a flexible pad fixedly disposed below the lower sliding plate, a flexible pad fixedly installed above a lower connecting plate connected to the lower structure, and the flexible pad vertically isolating external vibrations and impacts; and a retaining ring assembly, composed of one or more retaining components, installed around the periphery of the upper or lower sliding plate to form an enclosed structure. One end of the retaining ring assembly in the vertical direction is fixed to the upper or lower sliding plate by fasteners, and the other end is fitted with a buffer ring so that the buffer ring contacts the outer surface of the lower or upper sliding plate, thereby restricting the relative horizontal movement between the upper and lower sliding plates within the bearing limit of the fasteners.

[0005] Furthermore, the stop has an arc-shaped structure, and several stops are connected or spaced apart to form a continuous or discontinuous annular retaining ring assembly; the arc of the stop is adapted to the arc of the upper or lower sliding plate, and each stop is provided with at least one fastener and a buffer strip.

[0006] Furthermore, the cross-section of the stop is L-shaped, including a horizontal platform surface and a vertical wall surface. The fastener is a bolt, which passes through the platform surface and is threadedly fixed to the upper sliding plate or the lower connecting plate. The buffer strip is fixedly installed on the inner side of the wall edge. Several buffer strips are arranged in a ring structure in a continuous or intermittent manner. The buffer strip is located between the upper sliding plate or the lower sliding plate and the stop ring assembly.

[0007] Furthermore, the retaining ring assembly is composed of four arc-shaped retaining members of 1 / 4 arc segment spliced ​​end to end in sequence, and the buffer ring is composed of four buffer strips of 1 / 4 arc segment spliced ​​end to end in sequence; the retaining ring assembly is installed on the upper sliding plate by several bolts and is fitted around the outer periphery of the upper sliding plate, and the buffer ring is fitted around the outer wall of the lower sliding plate; or the retaining ring assembly is installed on the lower connecting plate by several bolts and is fitted around the outer periphery of the lower sliding plate, and the buffer ring is fitted around the outer wall of the upper sliding plate.

[0008] Furthermore, the upper sliding plate has a top plate extending horizontally outward from the upper top surface edge, the lower connecting plate is installed on the lower embedded plate, and a U-shaped soft steel formed by bending a long strip of soft steel is provided between the top plate of the upper sliding plate and the lower embedded plate; one end of the U-shaped soft steel is fixed on the top plate of the upper sliding plate, and the other end is set on the upper surface of the lower embedded plate; there are several U-shaped soft steels, which are arranged and installed along the periphery of the friction pendulum seismic isolation support.

[0009] Furthermore, the top plate of the upper sliding plate is connected and fixed to the upper embedded plate via a connector, and the lower connecting plate is fixedly connected to the lower embedded plate via a connector; the connector passes through the upper embedded plate and the lower embedded plate and connects to the upper structure and the lower structure.

[0010] Furthermore, an upper sliding pad and a lower sliding pad are respectively installed on the upper and lower surfaces of the spherical crown. The upper sliding pad, the spherical crown, and the lower sliding pad are sequentially assembled from top to bottom to form a sliding assembly. The lower sliding plate has a flat bottom and a concave spherical surface A on top. The lower surface of the upper sliding plate is machined with a concave spherical surface B, and the radius of curvature of the concave spherical surface B is the same as that of the concave spherical surface A. The upper sliding plate is disposed on the sliding assembly, and the sliding assembly can slide between the concave spherical surface A and the concave spherical surface B. The upper and lower surfaces of the spherical crown are both machined with convex spherical surfaces, and the radius of curvature of the convex spherical surfaces is the same as that of the concave spherical surface A. The upper sliding pad is installed on the convex spherical surface on the upper surface of the spherical crown, and the lower sliding pad is installed on the convex spherical surface on the lower surface of the spherical crown. After installation, the upper and lower sliding pads form convex spherical surfaces.

[0011] Furthermore, the U-shaped mild steel is composed of a rod-shaped bar structure, and the cross-section of the rod-shaped bar structure can be a round bar, a square bar, a hexagonal bar, or a flat bar.

[0012] Furthermore, the friction pendulum vibration isolation support is a single-curved friction pendulum support; the inner side of the upper or lower sliding plate is provided with a concave spherical surface; the spherical cap is a slider, and the surface corresponding to one side of the concave spherical surface is adapted to the concave spherical surface.

[0013] The working principle of this utility model: (a) The working stage of vibration isolation: The seismic isolation bearing provides sufficient support to enable the upper structure to meet daily use. Meanwhile, since a flexible pad (3) is provided between the lower sliding plate (2) and the lower connecting plate (4), the vertical stiffness of the flexible pad (3) can adjust the vertical natural frequency of the upper support, which has the function of isolating external vibration impact.

[0014] (II) The working stage of earthquake isolation: When the seismic action is small, the retaining ring assembly composed of the retaining member (5) restricts the relative horizontal movement between the upper sliding plate (1) and the lower sliding plate (2). There is no horizontal deformation between the upper sliding plate (1) and the lower sliding plate (2), only the flexible pad (3) will show a small horizontal deformation. When the earthquake is strong, the upper sliding plate (1) transfers the horizontal load to the lower sliding plate (2) through the stop (5). When the load exceeds the strength of the fastener of the stop (5), i.e. the fixing bolt, the fixing bolt of the stop (5) breaks, and the stop (5) separates from the upper sliding plate (1). At this time, the upper sliding plate (1) and the sliding assembly make relative curved surface movements and transfer the friction force to the sliding assembly. The sliding assembly also makes relative curved surface movements with the lower sliding plate (2) and transfers the friction force to the lower sliding plate (2). That is, the concave spherical surface B of the upper sliding plate (1) and the concave spherical surface A of the sliding assembly and the lower sliding plate (2) form a pendulum mechanism. The relative displacement is used to alleviate the earthquake impact. At the same time, the friction force is used to convert kinetic energy into heat energy to achieve the function of dissipating energy. During this process, due to the large horizontal stiffness of the flexible pad (3), the flexible pad (3) will deform slightly horizontally before the stop (5) and the upper sliding plate (1) are separated. After the stop (5) and the upper sliding plate (1) are separated, the friction is relatively small and the horizontal deformation of the flexible pad (3) can be ignored. When the upper sliding plate (1) and the lower sliding plate (2) make relative horizontal displacement, the U-shaped soft steel (11) passively follows the deformation. Since the U-shaped soft steel (11) has a strong plastic deformation capacity, during the deformation process, the U-shaped soft steel (11) provides stiffness and plastic deformation damping force to the support. When the relative horizontal displacement between the upper sliding plate (1) and the lower sliding plate (2) is large, the U-shaped soft steel (11) can also play a limiting role when it is overstretched.

[0015] The beneficial technical effects of this utility model are as follows: (1) It can meet the requirements of segmented and precise vibration isolation under the combined action of vibration and earthquake. By adjusting the vertical stiffness of the flexible pad, the natural frequency of the upper structure can be controlled outside the advantageous frequency range of environmental vibration (such as subway and equipment operation), thereby improving the isolation efficiency. The vertical decoupling design of the flexible pad and the friction pendulum system avoids the stiffness coupling problem of traditional series structures, and optimizes the vertical bearing capacity and horizontal sliding performance independently, solving the stress concentration problem caused by the mismatch of bearing area. By using the bolt bearing capacity threshold of the retaining ring component, it is ensured that the upper and lower sliding plates maintain a rigid connection under frequent earthquakes and design earthquakes, and the horizontal small displacement achieves vibration isolation and damping absorption. During rare earthquakes, when the load exceeds the bolt strength, the retaining part is disengaged from the upper sliding plate, the friction pendulum mechanism is activated, and the natural vibration period is extended by spherical sliding and the energy is dissipated by friction damping. At the same time, the U-shaped soft steel provides plastic deformation damping force to achieve horizontal ground motion isolation. The relative movement of the sliding components (upper sliding pad, spherical crown, lower sliding pad) between the concave spherical curved surface generates friction, which converts the ground motion energy into heat energy for dissipation. (2) Design optimization of structural coupling problem: The flexible pad independently undertakes the vertical vibration isolation function, which is separated from the horizontal vibration isolation mechanism of the friction pendulum. This avoids the problem of stiffness incompatibility caused by the difference in bearing area when the traditional helical spring and friction pendulum are connected in series, and improves the overall mechanical performance of the support. When the enclosed structure of the retaining ring assembly (such as arc-shaped retaining parts and buffer strips) restricts horizontal displacement, the vertical force center offset is reduced by uniformly distributed fasteners and buffer rings, avoiding uneven deformation of the spring support and destruction of the periodic stability of the friction pendulum, and reducing the risk of support tilting and stress concentration on the contact surface. The U-shaped soft steel provides additional damping force through plastic deformation, which enhances the energy dissipation capacity under rare earthquakes and makes up for the lack of single energy consumption of the traditional friction pendulum. It is suitable for scenarios such as rail transit superstructure buildings and precision laboratories where there are strict requirements for both vertical and horizontal vibration isolation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural view of a functional friction pendulum vibration isolation support according to the present invention; Figure 2 This is a three-dimensional cross-sectional view of a functional friction pendulum vibration isolation support according to the present invention. Figure 3 This is a schematic diagram of the mounting structure of the stop of a functional friction pendulum vibration isolation support according to the present invention; Figure 4 A three-dimensional view of the installation structure of the lower sliding plate and the spherical crown; Figure 5 A three-dimensional view of the installation cross-sectional structure of the lower sliding plate and the spherical crown; Figure 6 The main view shows the structure of the lower sliding plate and the spherical cap. Figure 7 This is a 3D view of the installation structure of the upper sliding plate; Figure 8 This is a three-dimensional cross-sectional view of the installation structure of the upper sliding plate; Figure 9 This is a three-dimensional structural diagram of the retaining ring assembly; Figure 10 This is a three-dimensional structural view of the baffle. Figure 11 A three-dimensional structural diagram of a U-shaped mild steel bar; Figure 12 This is a schematic diagram of the actual installation structure of a functional friction pendulum seismic isolation bearing; Figure 13 This is a schematic diagram of the practical application of a functional friction pendulum seismic isolation bearing. Figure 14 This is a schematic cross-sectional view of the actual installation structure of a functional friction pendulum seismic isolation bearing. Wherein: 1-upper sliding plate, 2-lower sliding plate, 3-flexible pad, 4-lower connecting plate, 5-stop, 6-buffer ring, 7-upper sliding pad, 8-spherical crown, 9-lower sliding pad, 10-U-shaped soft steel, 11-lower embedded plate, 12-upper embedded plate, 13-fastener, 14-buffer strip, 15-top plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model. Example

[0018] like Figures 1-3 As shown, the functional friction pendulum vibration isolation support mentioned in this patent is composed of an upper sliding plate 1, a lower sliding plate 2, a flexible pad 3, a lower connecting plate 4, a stop 5, a buffer ring 5, an upper sliding pad 7, a spherical crown 8, a lower sliding pad 9, and a U-shaped soft steel 10. The upper sliding plate 1 is connected to the upper structure through the upper embedded plate 12, and the lower connecting plate 4 is connected to the lower structure through the lower embedded plate 11.

[0019] like Figures 1-6 As shown, the flexible pad 3 is fixedly mounted on the lower connecting plate 4, and the lower sliding plate 2 is fixedly mounted on the flexible pad 3. The lower sliding plate has a flat plate on the bottom and a concave spherical surface A on the top. The upper sliding pad 7, the spherical cap 8, and the lower sliding pad 9 are sequentially assembled from top to bottom to form a sliding assembly. The upper and lower surfaces of the spherical cap 8 are machined with convex spherical surfaces, and the radius of curvature of the convex spherical surfaces is the same as that of the concave spherical surface A. The upper sliding pad 7 is installed on the convex spherical surface on the spherical cap 8, and the lower sliding pad 9 is installed on the convex spherical surface below the spherical cap 8. Due to the shape of the convex spherical surface, the upper sliding pad 7 and the lower sliding pad 9 are also deformed into convex spherical surfaces after installation.

[0020] The sliding component is disposed on the lower sliding plate 2, and the sliding component can slide on the upper curved surface of the lower sliding plate 2; like Figures 1-8 As shown, the upper sliding plate 1 is composed of two square plates, the upper plate being the top plate 15, which is connected to the upper embedded plate 12, and the lower plate having a concave spherical surface B machined on its lower surface, the radius of curvature of the concave spherical surface B being the same as that of the concave spherical surface A.

[0021] The upper sliding plate 1 is disposed on the sliding assembly, and the sliding assembly can slide on the concave spherical surface B of the upper sliding plate 1; There is a certain gap between the upper sliding plate 1 and the lower sliding plate 2.

[0022] like Figures 9-10 As shown, the stop 5 is a steel part with a 1 / 4 arc segment. Four stop 5 form a retaining ring assembly. The retaining ring assembly is installed on the lower plane of the top plate 15 of the upper sliding plate 1 by bolts, that is, it is installed on the outer periphery of the upper sliding plate 1.

[0023] A buffer ring 6 with a 1 / 4 arc segment is also provided between each of the stop pieces 5 and the lower sliding plate 2, and the buffer ring 6 is fixedly connected to the corresponding stop piece 5.

[0024] like Figure 11 As shown, the U-shaped mild steel 11 is a long mild steel sheet bent into a U shape. The U-shaped mild steel 11 is respectively arranged between the upper sliding plate 1 and the lower embedded plate 11. One end of the U-shaped mild steel 11 is fixed to the lower plane of the top plate 15 of the upper sliding plate 1, and the other end is arranged on the upper plane of the lower embedded plate 11.

[0025] like Figure 12 As shown, the lower connecting plate 4 is fixedly connected to the sleeve of the lower embedded plate 11 by bolts, and the upper sliding plate 1 is fixedly connected to the sleeve of the upper embedded plate 12.

[0026] Actual working process: The flexible pad 3 between the lower sliding plate 2 and the lower connecting plate 4 provides vertical support to meet the load requirements of the upper structure. The vertical stiffness of the flexible pad 3 can adjust the vertical natural frequency of the upper support, keeping it away from the high-frequency range of external vibrations and effectively isolating vertical vibration impacts. The retaining ring assembly and retainer 5, through fasteners 13 such as bolts, restrict the relative horizontal movement of the upper sliding plate 1 and the lower sliding plate 2, ensuring that there is no significant horizontal displacement under normal conditions.

[0027] When the seismic load is small, the retaining ring assembly maintains structural stability, while the flexible pad bears minor horizontal deformation. The retaining ring assembly's retainer 5 is bolted to the upper sliding plate 1 or the lower connecting plate 4, forming an enclosed structure that restricts the relative horizontal movement of the upper sliding plate 1 and the lower sliding plate 2. At this time, there is no horizontal deformation between the upper and lower sliding plates; only the flexible pad 3 undergoes minor elastic deformation due to the horizontal load, and the overall structure remains stable.

[0028] Under strong seismic forces, the friction pendulum mechanism and double-damping mechanism are triggered to achieve horizontal seismic isolation and energy dissipation. Specifically, the failure of the retaining ring assembly triggers the friction pendulum: when the horizontal load exceeds the strength of the fixing bolts of retaining member 5, the bolts break, the retaining member disengages from the upper sliding plate 1, and the horizontal displacement restriction is released. The concave spherical surface B of the upper sliding plate 1, the sliding assembly, and the concave spherical surface A of the lower sliding plate 2 form a pendulum mechanism. The relative sliding of the spherical surfaces extends the natural vibration period of the structure, mitigating seismic impact. The sliding assembly generates friction between the concave spherical surfaces, converting seismic energy into heat energy for dissipation.

[0029] Preferably, the U-shaped mild steel 11 undergoes plastic deformation with the relative horizontal displacement of the upper and lower sliding plates, providing additional damping force and further dissipating energy.

[0030] Before detachment: Flexible pad 3 undergoes slight deformation due to horizontal load; due to its high horizontal stiffness, the deformation is controllable. After detachment: The friction pendulum mechanism dominates the horizontal displacement, and the horizontal deformation of the flexible pad is negligible.

[0031] When the horizontal displacement is too large, the U-shaped mild steel 11 limits the displacement through tensile deformation, preventing excessive slippage of the support and ensuring structural safety. The flexible pad focuses on vertical vibration isolation, while the friction pendulum and the U-shaped mild steel work together to handle horizontal ground vibrations, avoiding the coupling contradiction between vertical and horizontal stiffness in traditional designs. Example

[0032] The following modifications can be made based on Example 1: like Figure 13 , 14 The four stops 5 form a retaining ring assembly, which is installed on the upper surface of the lower connecting plate 4 by bolts, that is, on the outer periphery of the lower sliding plate 2. A buffer ring 6 with a 1 / 4 arc segment is also provided between each of the aforementioned stop pieces 5 and the upper sliding plate 1, and the buffer ring 6 is fixedly connected to the corresponding stop piece 5; When the earthquake is strong, the upper sliding plate 1 transfers the horizontal load to the lower connecting plate 4 through the stop 5. When the load exceeds the strength of the fixing bolt of the stop 5, the fixing bolt of the stop 5 breaks, and the stop 5 is separated from the lower connecting plate 4. The subsequent working principle is the same as in Example 1.

[0033] Preferably, The U-shaped mild steel is composed of rod-shaped bar structures, and the cross-section of the rod-shaped bar structure can be round, square, hexagonal, or flat. It can be fabricated on-site by flexibly selecting steel bar workpieces with different cross-sectional shapes, balancing processing convenience and load-bearing requirements. It is easy to process into a "U-shape" through bending, welding, and other processes, possessing a certain strength and toughness, meeting the requirement that the U-shaped mild steel "must deform to dissipate energy without easily breaking under stress."

[0034] The friction pendulum isolation bearing is a single-curved friction pendulum bearing; the inner side of the upper or lower sliding plate is provided with a concave spherical surface; the spherical cap is a slider, and the surface corresponding to one side of the concave spherical surface is adapted to the concave spherical surface. The single-curved friction pendulum bearing, through the surface adaptation design of "concave spherical sliding plate + spherical cap slider", ensures smooth sliding and uniform load transfer, thereby improving the seismic isolation effect—this is an efficient and reliable design scheme that has been proven in practice.

[0035] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A functional friction pendulum vibration isolation bearing, comprising an upper sliding plate (1) connected to an upper structure, a lower sliding plate (2) connected to a lower structure, both the opposing surfaces of the upper sliding plate (1) and the lower sliding plate (2) being provided with concave spherical surfaces, and a spherical cap (8) located between the concave spherical surfaces of the upper sliding plate (1) and the lower sliding plate (2), characterized in that... Also includes: The flexible pad (3) is fixedly installed below the lower sliding plate (2). The flexible pad (3) is fixedly installed above the lower connecting plate (4). The lower connecting plate (4) is connected to the lower structure. The flexible pad (3) can isolate external vibrations and impacts in the vertical direction. The retaining ring assembly is composed of one or more retaining parts (5) and is installed around the periphery of the upper sliding plate (1) or the lower sliding plate (2) to form an enclosed structure. One end of the retaining ring assembly in the vertical direction is fixed to the upper sliding plate (1) or the lower connecting plate (4) by a fastener (13), and the other end is installed with a buffer ring (6) so that the buffer ring (6) contacts the outer surface of the lower sliding plate (2) or the upper sliding plate (1) to restrict the relative horizontal movement between the upper sliding plate (1) and the lower sliding plate (2) within the bearing limit of the fastener (13).

2. The functional friction pendulum vibration isolation bearing according to claim 1, characterized in that, The stop (5) has an arc-shaped structure. Several stop (5) are connected or spaced out and installed together to form a continuous or discontinuous ring-shaped stop assembly. The arc of the stop (5) is adapted to the arc of the upper sliding plate (1) or the lower sliding plate (2). Each stop (5) is provided with at least one fastener (13) and a buffer strip (14).

3. The functional friction pendulum vibration isolation bearing according to claim 2, characterized in that, The cross-section of the stop (5) is L-shaped, including a horizontal platform surface and a vertical wall surface. The fastener (13) is a bolt, which passes through the platform surface and is threadedly fixed to the upper sliding plate (1) or the lower connecting plate (4). The buffer strip (14) is fixedly installed on the inner side of the wall edge. Several buffer strips (14) are arranged in a ring structure in a continuous or intermittent manner. The buffer strip (14) is located between the upper sliding plate (1) or the lower sliding plate (2) and the stop ring assembly.

4. The functional friction pendulum vibration isolation bearing according to claim 3, characterized in that, The retaining ring assembly is formed by splicing four arc-shaped retaining parts (5) with 1 / 4 arc segments one end to the other, and the buffer ring (6) is formed by splicing four buffer strips (14) with 1 / 4 arc segments one end to the other. The retaining ring assembly is installed on the upper sliding plate (1) by several bolts and is fitted around the outer periphery of the upper sliding plate (1). The buffer ring (6) is fitted around the outer wall of the lower sliding plate (2). Alternatively, the retaining ring assembly can be installed on the lower connecting plate (4) by several bolts and fitted around the outer periphery of the lower sliding plate (2), and the buffer ring (6) can be sleeved with the outer wall of the upper sliding plate (1).

5. The functional friction pendulum vibration isolation bearing according to claim 1 or 2, characterized in that, The upper sliding plate (1) has a top plate (15) extending horizontally outward at the upper top edge. The lower connecting plate (4) is installed on the lower embedded plate (11). A U-shaped soft steel (10) formed by bending a long strip of soft steel sheet is provided between the top plate (15) of the upper sliding plate (1) and the lower embedded plate (11). One end of the U-shaped soft steel (10) is fixed on the top plate (15) of the upper sliding plate (1), and the other end is set on the upper surface of the lower embedded plate (11). There are several U-shaped soft steels (10), which are arranged and installed along the periphery of the friction pendulum seismic isolation support.

6. The functional friction pendulum vibration isolation bearing according to claim 5, characterized in that, The top plate (15) of the upper sliding plate (1) is connected and fixed to the upper embedded plate (12) through a connector, and the lower connecting plate (4) is fixedly connected to the lower embedded plate (11) through a connector; the connector passes through the upper embedded plate (12) and the lower embedded plate (11) and is connected to the upper structure and the lower structure.

7. The functional friction pendulum vibration isolation bearing according to claim 1, characterized in that, An upper sliding pad (7) and a lower sliding pad (9) are respectively installed on the upper and lower surfaces of the spherical cap (8). The upper sliding pad (7), the spherical cap (8), and the lower sliding pad (9) are sequentially combined from top to bottom to form a sliding assembly. The lower sliding plate (2) has a flat bottom and a concave spherical surface A on top. The lower surface of the upper sliding plate (1) is machined with a concave spherical surface B, and the radius of curvature of the concave spherical surface B is the same as the radius of curvature of the concave spherical surface A. The upper sliding plate (1) is disposed on the sliding assembly, and the sliding assembly can slide between the concave spherical surface A and the concave spherical surface B. The upper and lower surfaces of the spherical crown (8) are both machined with convex spherical surfaces, and the radius of curvature of the convex spherical surfaces is the same as that of the concave spherical surface A. The upper sliding pad (7) is installed on the convex spherical surface on the spherical crown (8), and the lower sliding pad (9) is installed on the convex spherical surface below the spherical crown (8). After installation, the upper sliding pad (7) and the lower sliding pad (9) form convex spherical surfaces.

8. The functional friction pendulum vibration isolation bearing according to claim 5, characterized in that, The U-shaped mild steel (10) is composed of a rod-shaped bar structure, and the cross-section of the rod-shaped bar structure can be a round bar, a square bar, a hexagonal bar, or a flat bar.

9. The functional friction pendulum isolation bearing according to any one of claims 1-4, characterized in that, The friction pendulum vibration isolation support is a single-curved friction pendulum support; the inner side of the upper sliding plate (1) or the lower sliding plate (2) is provided with a concave spherical surface; the spherical cap is a slider, and the surface corresponding to one side of the concave spherical surface is adapted to the concave spherical surface.

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