A friction pendulum isolation support

Abstract

The present invention provides a friction pendulum seismic isolation bearing, which relates to the field of bridge bearings. The present invention comprises an upper seat plate, a middle seat plate, a spherical crown plate and a lower seat plate, wherein the middle seat plate is located between the upper seat plate and the spherical crown plate, and the spherical crown plate is located between the middle seat plate and the lower seat plate; a limiting member is arranged on the lower seat plate around the middle seat plate, and the limiting member is limitedly matched with the middle seat plate, and the middle seat plate, the lower seat plate and the limiting member jointly form a seismic isolation displacement cavity; a first sealing member is arranged between the middle seat plate and the limiting member to prevent external impurities from entering between the middle seat plate and the limiting member; a second sealing member is arranged between the upper seat plate and the middle seat plate to prevent external impurities from entering between the upper seat plate and the middle seat plate. Compared with the prior art, the present invention has the advantage that the friction surface is not easily worn severely.

Description

Technical Field

[0001] The invention relates to the technical field of bridge bearings, and in particular to a friction pendulum seismic isolation bearing. Background Art

[0002] Bridge bearings are one of the important components in bridge engineering. They are divided into ordinary functional bearings and seismic isolation functional bearings. There are three types of seismic isolation functional bearings, namely rubber seismic isolation bearings, elastic-plastic steel seismic isolation bearings and friction pendulum seismic isolation bearings. Friction seismic isolation bearings achieve seismic isolation function through the principle of ball core swing. Specifically, they use the friction surface to achieve the shock absorption and energy dissipation function, and use the swing to achieve the seismic isolation function. They have a wide range of applications, especially in the field of bridges. They are suitable for precast beams, steel bridges, continuous beam bridges with large bearing capacity, arch bridges and prestressed concrete cable-stayed bridges. They have been widely used in other fields.

[0003] In actual engineering applications, many bridges use conventional hyperbolic friction pendulum supports. When the bridge expands and contracts due to temperature, the friction surface of the friction pendulum will experience relative movement. However, dust and other impurities may enter the friction surface during use, resulting in increasingly serious wear of the parts material at the friction surface, posing certain safety hazards. Utility Model Content

[0004] In order to solve the above problems, the present application provides a friction pendulum isolation bearing.

[0005] The present application provides a friction pendulum isolation bearing, which adopts the following technical solution:

[0006] A friction pendulum seismic isolation support comprises an upper seat plate, a middle seat plate, a spherical crown plate and a lower seat plate, wherein:

[0007] The middle seat plate is located between the upper seat plate and the spherical crown plate, and the spherical crown plate is located between the middle seat plate and the lower seat plate;

[0008] A limiting member is arranged on the lower seat plate around the middle seat plate, the limiting member is in limited cooperation with the middle seat plate, and the middle seat plate, the lower seat plate and the limiting member jointly form a seismic isolation displacement cavity;

[0009] A first seal is provided between the middle seat plate and the limiting member to prevent foreign matter from entering between the middle seat plate and the limiting member; a second seal is provided between the upper seat plate and the middle seat plate to prevent foreign matter from entering between the upper seat plate and the middle seat plate.

[0010] Preferably, the first sealing member comprises a sealing skirt, one side of the sealing skirt is connected to the middle seat plate, and the other side of the sealing skirt is overlapped on the limiting member.

[0011] Preferably, a first wear-resistant part is provided between the upper seat plate and the middle seat plate;

[0012] And / or, a second wear-resistant part is provided between the middle seat plate and the spherical crown plate;

[0013] And / or, a third wear-resistant part is arranged between the spherical crown plate and the lower seat plate.

[0014] Preferably, the second sealing member is arranged around the first wear-resistant member.

[0015] Preferably, a rotation gap is provided between the limiting member and the middle seat plate.

[0016] Preferably, a shear gap is provided between a portion of the limiting member which is away from the seismic isolation displacement cavity and the lower seat plate.

[0017] Preferably, the limiting member is connected to the lower seat plate via a limiting bolt, and the shear gap extends from a side of the limiting member away from the seismic isolation displacement cavity to the limiting bolt.

[0018] Preferably, the minimum distance between the middle seat plate and the lower seat plate is greater than zero.

[0019] Preferably, a limiting portion is provided on the upper seat plate, and the limiting portion is located on the moving path of the middle seat plate to limit the displacement range of the middle seat plate relative to the upper seat plate.

[0020] Preferably, a plane friction pair is formed between the upper seat plate and the middle seat plate;

[0021] And / or, a curved friction pair is formed between the middle seat plate and the spherical crown plate;

[0022] And / or, a curved friction pair is formed between the spherical crown plate and the lower seat plate.

[0023] The present invention has the following advantages and beneficial effects:

[0024] The present invention has friction surfaces between the upper seat plate and the middle seat plate, between the middle seat plate and the spherical crown plate, and between the spherical crown plate and the lower seat plate. The friction surfaces between the spherical crown plate, the middle seat plate and the lower seat plate are respectively located in the seismic isolation displacement cavity, and the friction surface between the upper seat plate and the middle seat plate is located outside the seismic isolation displacement cavity. The seismic isolation displacement cavity is sealed by a first sealing member, thereby preventing external dust and other substances from entering the seismic isolation displacement cavity, thereby effectively preventing dust from entering the two friction surfaces located in the seismic isolation displacement cavity; the gap between the upper seat plate and the middle seat plate is sealed by a second sealing member, thereby effectively preventing external dust and other substances from entering between the upper seat plate and the middle seat plate, thereby realizing sealing protection of a total of three friction surfaces between the upper seat plate and the middle seat plate, between the middle seat plate and the spherical crown plate, and between the spherical crown plate and the lower seat plate.

[0025] The fully sealed design of the friction surface can effectively prevent external dust from entering the friction surface, which is beneficial to reducing the friction coefficient of the friction surface, making it less likely for the parts on the friction surface to be severely worn, thereby extending the service life of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a first cross-sectional schematic diagram of an embodiment of the present application.

[0028] Figure 2 It is a second cross-sectional schematic diagram of an embodiment of the present application.

[0029] Figure 3 It is a partial cross-sectional view of an embodiment of the present application.

[0030] Figure 4 yes Figure 1 Enlarged schematic diagram of part A in the middle.

[0031] Figure 5 yes Figure 1 Enlarged schematic diagram of part B in the middle.

[0032] Figure 6 yes Figure 1 Enlarged schematic diagram of part C in the middle.

[0033] Figure 7 It is a structural schematic diagram of the lower seat plate.

[0034] Figure 8 It is a structural diagram of the middle seat plate.

[0035] Fig. 9 It is a structural diagram of the spherical crown plate.

[0036] Fig.10 This is the state diagram after the upper seat plate moves a distance e1.

[0037] Fig.11 This is the state diagram when the upper limit piece is cut off.

[0038] Fig.12 This is the state diagram after the upper seat plate moves a distance of e1+e2.

[0039] The markings in the figure are:

[0040] 1. Upper seat plate; 2. Middle seat plate; 2a. Abutment portion; 3. Ball crown plate; 4. Lower seat plate; 4a. Protruding edge; 5. Limiting member; 6. Isolation displacement cavity; 7. First sealing member; 8. Second sealing member; 9. First wear-resistant member; 10. Second wear-resistant member; 11. Third wear-resistant member; 12. Rotational gap; 13. Shearing gap; 14. Limiting bolt; 15. Limiting portion. DETAILED DESCRIPTION

[0041] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0042] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0043] The inventor discovered that the friction pendulum isolation bearing may have the problem of friction surface wear during use. After research and experiments, it was found that during use, dust in the air will enter the friction pendulum isolation bearing along the gaps and openings of the friction pendulum isolation bearing. When the bridge expands and contracts due to external temperature and other reasons, friction movement will be generated at the friction surface of the friction pendulum. However, friction pendulum isolation bearings are generally installed outside, so they will be accompanied by wind, rain and other conditions during use, which will cause some dust to enter the friction surface through wind or water. When friction movement occurs at the friction surface, the dust will cause the friction coefficient at the friction surface to increase, thereby causing serious wear of the parts at the friction surface.

[0044] To this end, the present application provides a separating friction pendulum seismic isolation bearing (SFPB for short), which can effectively prevent external dust from entering the friction surface by setting a first seal 7 and a second seal 8. In this way, the friction surface can be kept clean during use, avoiding the situation where the friction coefficient increases due to dust on the friction surface, resulting in severe wear of parts.

[0045] The following is combined with Figures 1 to 12 , a friction pendulum isolation bearing provided in an embodiment of the present application is described in detail through specific embodiments and application scenarios.

[0046] The present application provides a friction pendulum isolation support, referring to Figure 1 , from top to bottom, it includes an upper seat plate 1, a middle seat plate 2, a ball crown plate 3 and a lower seat plate 4. The upper side of the upper seat plate 1 is used to connect with a bridge, etc., and the lower side of the upper seat plate 1 is used to form a friction pair with the middle seat plate 2. The ball crown plate 3 is located at the lower side of the upper seat plate 1, and a friction pair is formed between the ball crown plate 3 and the lower seat plate 4. The lower seat plate 4 is located at the lower side of the ball crown plate 3, and a friction pair is formed between the lower side surface of the ball crown plate 3 and the lower seat plate 4, that is, relative sliding can occur between the upper seat plate 1 and the middle seat plate 2, between the middle seat plate 2 and the ball crown plate 3, and between the ball crown plate 3 and the lower seat plate 4. The surrounding of the lower seat plate 4 is raised upward to form a convex edge 4a, and the sliding range of the ball crown plate 3 on the lower seat plate 4 is limited by the convex edge 4a. When the ball crown plate 3 slides relative to the lower seat plate 4 until it contacts the convex edge 4a, the convex edge 4a will abut against the side of the ball crown plate 3, thereby preventing the ball crown plate 3 from continuing to move.

[0047] Reference Figure 1 , Figure 2 , a limiting member 5 is arranged on the convex edge 4a around the middle seat plate 2, that is, a limiting member 5 is arranged around the middle seat plate 2, and an abutting portion 2a is arranged around the middle seat plate 2, and the abutting portion 2a is used to abut with the limiting member 5. The upper surface height of the limiting member 5 is higher than the lower surface height of the abutting portion 2a. Therefore, when a relative displacement occurs between the middle seat plate 2 and the lower seat plate 4, the abutting portion 2a can contact with the limiting member 5, thereby limiting the relative displacement range of the middle seat plate 2 relative to the lower seat plate 4. The middle seat plate 2, the lower seat plate 4 and the limiting member 5 together form a seismic isolation displacement cavity 6, and the spherical crown plate 3 is located in the seismic isolation cavity. A first sealing member 7 is arranged between the middle seat plate 2 and the limiting member 5, that is, the gap between the middle seat plate 2 and the limiting member 5 is sealed by the first sealing member 7, so that external dust and the like are not easy to enter the seismic isolation displacement cavity 6 through the gap between the middle seat plate 2 and the limiting member 5. A second sealing member 8 is provided between the upper seat plate 1 and the middle seat plate 2 , that is, the second sealing member 8 prevents external dust from entering between the upper seat plate 1 and the middle seat plate 2 .

[0048] In some optional embodiments, a limiting portion 15 is provided on the upper seat plate 1, and the limiting portion 15 is arranged around the middle seat plate 2. When the upper seat plate 1 and the middle seat plate 2 move relative to each other, the limiting portion 15 is used to abut against the middle seat plate 2, thereby limiting the relative displacement between the middle seat plate 2 and the upper seat plate 1. In some embodiments, in the lateral direction of the upper seat plate 1, the distance between the relative limiting portions 15 is greater than the maximum width of the middle seat plate 2 in this direction (refer to Figure 1), in the longitudinal direction of the upper seat plate 1, the distance between the opposite limiting portions 15 is the same as the maximum width of the middle seat plate 2 in this direction (refer to Figure 2 ), that is, through the limit portion 15, the upper seat plate 1 and the middle seat plate 2 can slide a certain displacement in the lateral direction, but in the longitudinal direction, the upper seat plate 1 and the middle seat plate 2 cannot have a relative displacement. Figure 1 The upper seat plate 1 and the middle seat plate 2 can produce relative displacement in both longitudinal and lateral positions.

[0049] In some optional embodiments, referring to Figure 3 , Figure 5 The first sealing member 7 includes a sealing skirt, which is a sheet-like structure. The sealing skirt is arranged around the middle seat plate 2 and the stopper 5. The upper side of the sealing skirt is connected to the middle seat plate 2, and the lower side of the sealing skirt is overlapped on the stopper 5. Therefore, when the middle seat plate 2 and the lower seat plate 4 are relatively displaced, relative movement can be generated between the sealing skirt and the stopper 5, so that the sealing skirt will not be stretched and deformed during operation, thereby extending the service life of the sealing skirt. In some embodiments, the sealing skirt is draped on the stopper 5, that is, at least part of the sealing skirt is stacked on the stopper 5, thereby improving the sealing performance between the sealing skirt and the stopper 5, so that the sealing skirt has a better blocking effect on splashing rainwater, and prevents rainwater from entering the seismic isolation displacement cavity 6.

[0050] In some optional embodiments, referring to Figure 4 A first wear-resistant member 9 is disposed between the upper seat plate 1 and the middle seat plate 2. In some embodiments, the first wear-resistant member 9 is disposed on the middle seat plate 2. Specifically, a groove is provided on the middle seat plate 2, and the first wear-resistant member 9 is embedded in the groove. It can be understood that the thickness of the first wear-resistant member 9 is greater than the depth of the groove. Preferably, the depth of the groove is not less than the thickness of the first wear-resistant member 9 exposed outside the groove. In some embodiments, the cross section of the groove is circular, and the first wear-resistant member 9 is a circular sheet.

[0051] In some optional embodiments, referring to Figure 1 , Fig. 9 A second wear-resistant part 10 is arranged between the middle seat plate 2 and the ball crown plate 3. In some embodiments, the second wear-resistant part 10 is arranged on the ball crown plate 3. Specifically, a groove is opened on the ball crown plate 3, and the second wear-resistant part 10 is embedded in the groove. It can be understood that the thickness of the second wear-resistant part 10 is greater than the depth of the groove. Preferably, the depth of the groove is not less than the thickness of the second wear-resistant part 10 exposed outside the groove.

[0052] In some optional embodiments, referring to Figure 1 , Fig. 9A third wear-resistant part 11 is provided between the ball crown plate 3 and the lower seat plate 4. In some embodiments, the third wear-resistant part 11 is provided on the ball crown plate 3. Specifically, a groove is provided on the side of the ball crown plate 3 away from the middle seat plate 2, and the third wear-resistant part 11 is embedded in the groove. It can be understood that the thickness of the third wear-resistant part 11 is greater than the depth of the groove. Preferably, the depth of the groove is not less than the thickness of the third wear-resistant part 11 exposed outside the groove.

[0053] In some optional embodiments, referring to Figure 4 , the second seal 8 is arranged around the first wear-resistant part 9, a groove for installing the second seal 8 is opened on the middle seat plate 2, the second seal 8 is embedded in the groove, and the compression margin of the second seal 8 in the groove depth direction is similar to that of the first wear-resistant part 9, that is, when the bridge applies force to the upper seat plate 1, the upper seat plate 1 will compress the second seal 8 and the first wear-resistant part 9 in the vertical direction, and in the numerical direction, the compression margins of the first wear-resistant part 9 and the second seal 8 are similar, so that the second seal 8 can better seal the gap between the upper seat plate 1 and the middle seat plate 2. In some embodiments, the closest distance between the second seal 8 and the first wear-resistant part 9 is not less than 10 mm.

[0054] In some optional embodiments, referring to Figure 5 A rotation gap 12 is provided between the stopper 5 and the middle seat plate 2. Due to the expansion and contraction of the bridge temperature and the braking force of the car, a relative rotation angle will be generated between the middle seat plate 2 and the lower seat plate 4. If the middle seat plate 2 and the lower seat plate 4 are limited in the circumferential direction, a large stress will be generated between the abutment 2a and the stopper 5, which is not conducive to the release of the internal stress of the bearing and may affect the service life and normal function of the bearing. For this reason, a rotation gap 12 is provided between the stopper 5 and the middle seat plate 2, that is, between the abutment 2a and the stopper 5. The rotation gap 12 is used to provide a certain angle of relative rotation between the middle seat plate 2 and the lower seat plate 4. In some embodiments, the width of the rotation gap 12 is not less than 0.1 mm; since external dust and the like will enter the seismic isolation displacement cavity 6 through the rotation gap 12, in principle, the smaller the value of the rotation gap 12, the better, and the rotation gap 12 is sealed by the first sealing member 7.

[0055] In some optional embodiments, referring to Figure 6A shear gap 13 is provided between the portion of the limiter 5 that is away from the isolation displacement cavity 6 and the lower seat plate 4. Under earthquake conditions, the upper seat plate 1 starts to slide along the first wear-resistant plate until it slides to the maximum value. At this time, the middle seat plate 2 abuts against the limiter 15. Subsequently, the middle seat plate 2 generates a horizontal driving force on the limiter 5 under the push of the limiter 15, so that a horizontal shear force is generated between the limiter 5 and the lower seat plate 4. As the upper seat plate 1 continues to move, the limiter 5 is cut off. By setting the shear gap 13, the limiter 5 can be easily cut off, and the situation in which the limiter 5 cannot be sheared due to the contact pressure occurs. In some embodiments, the shear gap 13 is not less than 0.5 mm.

[0056] In some optional embodiments, referring to Figure 3 , Figure 4 The limit member 5 is connected to the lower seat plate 4 through the limit bolt 14, and the shear gap 13 extends from the side of the limit member 5 away from the seismic isolation displacement cavity 6 to the limit bolt 14. Under earthquake conditions, the limit bolt 14 will be cut off. During subsequent maintenance, the remaining limit bolt 14 can be removed and replaced with a new limit bolt 14, so that the limit member 5 can be easily installed in place without replacing other components. In some embodiments, the limit bolt 14 can be selected according to different needs to meet the needs of different shear forces. In some embodiments, in order to facilitate the installation of the limit bolt 14, a bolt hole is provided on the lower seat plate 4.

[0057] In some optional embodiments, the minimum distance between the middle seat plate 2 and the lower seat plate 4 is greater than zero. When the stop bolt 14 is cut off, the remaining stop bolt 14 is easy to contact the middle seat plate 2, thereby destroying the friction surface and causing damage to the middle seat plate 2. In addition, the installation positioning is a curved surface and a vertical line positioning, which is easy to produce deviations. Therefore, by setting a certain height difference between the middle seat plate 2 and the lower seat plate 4, when the middle seat plate 2 and the lower seat plate 4 produce relative displacement, the middle seat plate 2 will not contact the cut stop bolt 14, thereby avoiding the situation where the middle seat plate 2 is scratched. In some embodiments, the minimum distance between the middle seat plate 2 and the lower seat plate 4 is not less than 3mm.

[0058] In some optional embodiments, referring to Figure 1 , Figure 8 , a plane friction pair is formed between the upper seat plate 1 and the middle seat plate 2, that is, the contact surface between the upper seat plate 1 and the middle seat plate 2 is a plane. In some optional embodiments, a curved friction pair is formed between the middle seat plate 2 and the spherical crown plate 3, that is, the contact surface between the middle seat plate 2 and the spherical crown plate 3 is a spherical surface or a cylindrical surface. In some optional embodiments, a curved friction pair is formed between the spherical crown plate 3 and the lower seat plate 4, that is, the contact surface between the spherical crown plate 3 and the lower seat plate 4 is a spherical surface or a cylindrical surface.

[0059] In some embodiments, reference Figure 1 , Fig. 9The contact surface between the spherical crown plate 3 and the middle seat plate 2, and the contact surface between the spherical crown plate 3 and the lower seat plate 4 are both spherical surfaces, and the spherical diameter of the contact surface between the spherical crown plate 3 and the middle seat plate 2 is smaller than the spherical diameter of the contact surface between the spherical crown plate 3 and the lower seat plate 4. The second wear-resistant part 10 and the third wear-resistant part 11 embedded in the spherical crown plate 3 are both shaped to match the spherical surface of the spherical crown plate 3.

[0060] In the above embodiments, the first wear-resistant part 9, the second wear-resistant part 10 and the third wear-resistant part 11 may be polytetrafluoroethylene plates, or other materials with physical properties similar to polytetrafluoroethylene, mainly expecting the effects of wear resistance and lubrication.

[0061] Reference Fig.10 , Fig.12 This application adopts a structural design of conventional displacement e1 and seismic isolation displacement e2, that is, the upper seat plate 1 and the middle seat plate 2 are plane friction pairs, which can realize conventional displacement e1, and the spherical friction pair between the ball crown plate 3 and the middle seat plate 2 can realize temperature expansion and contraction, rotation caused by the braking force of the car, that is, normal rotation angle, and the spherical friction pair between the ball crown plate 3 and the lower seat plate 4, and the spherical friction pair between the ball crown plate 3 and the middle seat plate 2, together realize seismic isolation displacement e2. During an earthquake, the upper seat plate 1 drives the beam body to slide in the direction of the earthquake movement first, until the displacement e1, and the limit parts 15 on both sides of the upper seat plate 1 contact the edge of the middle seat plate 2 (refer to Fig.10 ), because the horizontal bearing capacity of the limiting parts 15 on both sides of the upper seat plate 1 is greater than the shearing force of the limiting bolt 14, the lower seat plate 4 drives the middle seat plate 2 to shear the limiting bolt 14 connecting the limiting part 5 and the lower seat plate 4 to the bottom surface around the lower seat plate 4 (refer to Fig.11 ), which in turn drives the spherical crown plate 3 to swing in the direction of the earthquake movement until the earthquake displacement e2. To ensure that the upper and lower parts of the overall support remain horizontal, the two spherical surfaces of the spherical crown plate 3 are adaptively adjusted (refer to Fig.12 ).

[0062] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A friction pendulum isolation support, characterized in that: It comprises an upper seat plate (1), a middle seat plate (2), a spherical crown plate (3) and a lower seat plate (4), wherein: The middle seat plate (2) is located between the upper seat plate (1) and the spherical crown plate (3), and the spherical crown plate (3) is located between the middle seat plate (2) and the lower seat plate (4); A limiting member (5) is arranged on the lower seat plate (4) around the middle seat plate (2), the limiting member (5) is in limited cooperation with the middle seat plate (2), and the middle seat plate (2), the lower seat plate (4) and the limiting member (5) together form a seismic isolation displacement cavity (6); A first sealing member (7) is provided between the middle seat plate (2) and the limiting member (5) to prevent foreign matter from entering between the middle seat plate (2) and the limiting member (5); and a second sealing member (8) is provided between the upper seat plate (1) and the middle seat plate (2) to prevent foreign matter from entering between the upper seat plate (1) and the middle seat plate (2).

2. The friction pendulum isolation support according to claim 1, characterized in that: The first sealing member (7) comprises a sealing skirt, one side of which is connected to the middle seat plate (2), and the other side of which is overlapped on the limiting member (5).

3. The friction pendulum isolation support according to claim 1, characterized in that: A first wear-resistant part (9) is arranged between the upper seat plate (1) and the middle seat plate (2); And / or, a second wear-resistant part (10) is provided between the middle seat plate (2) and the spherical crown plate (3); And / or, a third wear-resistant part (11) is provided between the spherical crown plate (3) and the lower seat plate (4).

4. The friction pendulum isolation support according to claim 3, characterized in that: The second sealing member (8) is arranged around the first wear-resistant member (9).

5. The friction pendulum isolation bearing according to claim 1, characterized in that: A rotation gap (12) is provided between the limiting member (5) and the middle seat plate (2).

6. The friction pendulum isolation support according to claim 1, characterized in that: A shear gap (13) is provided between the portion of the limiting member (5) that is away from the seismic isolation displacement cavity (6) and the lower seat plate (4).

7. The friction pendulum isolation support according to claim 6, characterized in that: The limiting member (5) is connected to the lower seat plate (4) via a limiting bolt (14), and the shear gap (13) extends from a side of the limiting member (5) away from the seismic isolation displacement cavity (6) to the limiting bolt (14).

8. A friction pendulum isolation bearing according to any one of claims 1 to 7, characterized in that: The minimum distance between the middle seat plate (2) and the lower seat plate (4) is greater than zero.

9. A friction pendulum isolation bearing according to any one of claims 1 to 7, characterized in that: A limiting portion (15) is provided on the upper seat plate (1), and the limiting portion (15) is located on the moving path of the middle seat plate (2) to limit the displacement range of the middle seat plate (2) relative to the upper seat plate (1).

10. A friction pendulum seismic isolation bearing according to any one of claims 1 to 7, characterized in that: A plane friction pair is formed between the upper seat plate (1) and the middle seat plate (2); and / or, a curved friction pair is formed between the middle seat plate (2) and the spherical crown plate (3); And / or, a curved friction pair is formed between the spherical crown plate (3) and the lower seat plate (4).

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