Liftable friction pendulum shock insulation support

Abstract

The invention provides a liftable friction pendulum shock insulation support, and relates to the technical field of building shock insulation, the liftable friction pendulum shock insulation support comprises an upper seat plate, a lower seat plate and a spherical crown plate, the spherical crown plate is arranged between the upper seat plate and the lower seat plate, sliding plates are arranged between the spherical crown plate and the upper seat plate and between the spherical crown plate and the lower seat plate, and the spherical crown plate comprises an upper crown plate and a lower crown plate; an elastic element is arranged between the upper crown plate and the lower crown plate, the elastic force of the elastic element enables the upper crown plate to have the trend of overcoming the self weight to move upwards, a limiting structure is further arranged between the upper crown plate and the lower crown plate, and the limiting structure enables the upper crown plate and the lower crown plate to be relatively fixed in the horizontal direction. According to the friction pendulum shock insulation support capable of being lifted away, the structural tensile stress during an earthquake is released, a building structure is protected against damage, the sliding plate is prevented from being damaged by impact, and the shock insulation function of the friction pendulum shock insulation support capable of being lifted away is maintained; the damping performance and the anti-overturning capacity of the friction pendulum shock insulation support are improved, and the application range of the friction pendulum shock insulation support is expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of building seismic isolation, and particularly to a lift-off friction pendulum seismic isolation bearing. Background Art

[0002] The friction pendulum seismic isolation bearing is a common seismic isolation bearing. The principle of its seismic isolation and energy dissipation is to set the spherical radius of the bearing, thereby extending the natural vibration period of the structure and reducing the seismic response of the structure; the energy input into the structure is dissipated through the friction of the friction pair. The friction pendulum seismic isolation bearing is widely applicable to building and bridge seismic isolation structures due to its simple structure and excellent durability performance.

[0003] The friction pendulum seismic isolation bearing usually consists of an upper seat plate, a lower seat plate and a middle spherical crown. There is no vertical connecting member between the three components. Under the action of pressure, the three components of the friction pendulum bearing play the seismic isolation function through the friction pair. However, there is no component to bear the tensile force between its three components, and it is a device with discontinuous vertical tensile resistance. Therefore, the application of the friction pendulum has great limitations, and the aspect ratio of the building structure is extremely strictly limited, and there should be no pulling force at each bearing part.

[0004] With the development of technology, a solution of a tensile friction pendulum with tensile guide rails arranged along the mutually perpendicular X and Y directions has gradually emerged. However, whether the tensile friction pendulum will get stuck under the action of tension and shear, and whether the friction pendulum bearing can function under the tension and shear condition has not been tested, and its practical application value is still uncertain. In some near-field areas, tensile forces often occur at the corners of the seismic isolation building. When the building is lifted and then falls back, the upper load will have a great impact on the sliding plate material in the friction pendulum seismic isolation bearing. The short-term destructive impact force will cause the sliding plate material to fester, and the function of the friction pendulum seismic isolation bearing will fail. Summary of the Invention

[0005] The purpose of the present invention is to provide a lift-off friction pendulum seismic isolation bearing to solve the problem that the existing friction pendulum seismic isolation bearing cannot effectively cope with vertical tensile forces and to improve the anti-overturning ability of the friction pendulum seismic isolation bearing.

[0006] The present invention provides a lift-off friction pendulum seismic isolation bearing, which includes an upper seat plate, a lower seat plate and a spherical crown plate. The spherical crown plate is arranged between the upper seat plate and the lower seat plate. Sliding plates are provided between the spherical crown plate and the upper seat plate, and between the spherical crown plate and the lower seat plate. The spherical crown plate includes an upper crown plate and a lower crown plate. An elastic element is provided between the upper crown plate and the lower crown plate. The elastic force of the elastic element makes the upper crown plate tend to move upward against its own weight. A limiting structure is also provided between the upper crown plate and the lower crown plate, and the limiting structure makes the upper crown plate and the lower crown plate relatively fixed in the horizontal direction.

[0007] In an alternative embodiment, the limiting structure further includes a longitudinal limiting mechanism, and the longitudinal limiting structure defines the maximum stroke of the upper crown plate moving upward relative to the lower crown plate.

[0008] In an alternative embodiment, the longitudinal limiting mechanism includes a first longitudinal limiting portion provided on the upper crown plate and a second longitudinal limiting portion provided on the lower crown plate, and the second longitudinal limiting portion is located above the first longitudinal limiting portion.

[0009] In an alternative embodiment, the limiting structure includes a first horizontal limiting portion provided on the upper crown plate and a second horizontal limiting portion provided on the lower crown plate, and the first horizontal limiting portion and the second horizontal limiting portion are oppositely arranged in the horizontal direction.

[0010] In an alternative embodiment, the limiting mechanism includes an upper flange plate provided at the lower part of the upper crown plate and a lower flange plate provided at the upper part of the lower crown plate. The side surfaces of the upper flange plate and the lower flange plate are oppositely arranged, the upper end surfaces of the upper flange plate and the lower end surfaces of the lower flange plate are oppositely arranged, and the upper end surface of the upper flange plate is located below the lower end surface of the lower flange plate.

[0011] In an alternative embodiment, at least two upper flange plates and at least two lower flange plates are uniformly arranged along the circumferential direction, and the gaps between the upper flange plates allow the lower flange plates to penetrate, and the gaps between the lower flange plates allow the upper flange plates to penetrate.

[0012] In an alternative embodiment, a damping cable is further included, and both ends of the damping cable are respectively fixed in the upper seat plate and the lower seat plate.

[0013] In an alternative embodiment, at least two damping cables are uniformly arranged in the circumferential direction.

[0014] In an alternative embodiment, the length L of the damping cable is L = L0 + 2L1, where L1 is the anchoring length of the end of the damping cable anchored in the upper seat plate or the lower seat plate, L0 is the free length of the damping cable, and the calculation formula of L0 is where L h is the horizontal design displacement of the structure under a major earthquake, and h0 is the height of the lift-off friction pendulum isolation bearing.

[0015] In an alternative embodiment, both the upper crown plate and the lower crown plate are provided with installation grooves, and the upper and lower ends of the elastic element are respectively located in the installation grooves of the upper crown plate and the lower crown plate.

[0016] The lift-off friction pendulum isolation bearing provided by the present invention has the following beneficial effects:

[0017] The present invention utilizes the upper crown plate and the lower crown plate to form the external structure of the spherical crown plate. An elastic element is provided between the upper crown plate and the lower crown plate. The elastic force of the elastic element causes the upper crown plate to have a tendency to move upward against its own weight, so that the upper crown plate, the sliding plate and the upper seat plate can always be in contact. When a vertical tensile force occurs, the tensile stress of the structure is released, and the upper seat plate generates an upward displacement. At this time, the elastic force of the elastic element is sufficient to overcome the weight of the upper crown plate, and the upper crown plate can achieve synchronous movement with the upper seat plate. The sliding plate is always in contact with both the upper seat plate and the upper crown plate. When the upper seat plate falls downward, the elastic element can also play a buffering role. Therefore, during the occurrence of a vertical tensile force, there will be no violent impact between the upper crown plate and the lower crown plate, and the sliding plate will not be damaged by the impact, maintaining the seismic isolation function of the lift-off friction pendulum seismic isolation bearing. The damping performance and anti-overturning ability of the friction pendulum seismic isolation bearing are improved, and the application range of the friction pendulum seismic isolation bearing is expanded. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a side structural sectional view of the lift-off friction pendulum seismic isolation bearing provided by an embodiment of the present invention;

[0020] Figure 2 It is a top view of the lift-off friction pendulum seismic isolation bearing provided by an embodiment of the present invention;

[0021] Figure 3 It is a side structural sectional view of the spherical crown plate and the sliding plate of the lift-off friction pendulum seismic isolation bearing provided by an embodiment of the present invention;

[0022] Figure 4 It is a side structural sectional view of the upper crown plate of the spherical crown plate of the lift-off friction pendulum seismic isolation bearing provided by an embodiment of the present invention;

[0023] Figure 5 It is a bottom view of the upper crown plate of the spherical crown plate of the lift-off friction pendulum seismic isolation bearing provided by an embodiment of the present invention;

[0024] Figure 6 It is a side structural sectional view of the lower crown plate of the spherical crown plate of the lift-off friction pendulum seismic isolation bearing provided by an embodiment of the present invention;

[0025] Figure 7 It is a top view of the lower crown plate of the spherical crown plate of the lift-off friction pendulum seismic isolation bearing provided by an embodiment of the present invention.

[0026] Icons: 100 - upper seat plate; 200 - lower seat plate; 310 - upper crown plate; 311 - upper flange plate; 312 - first longitudinal limiting part; 313 - first horizontal limiting part; 320 - lower crown plate; 321 - lower flange plate; 322 - second longitudinal limiting part; 333 - second horizontal limiting part; 330 - elastic element; 340 - mounting groove; 400 - sliding plate; 500 - damping cable. Detailed implementation manners

[0027] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does 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 a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0031] In addition, terms such as "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "arrangement", "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0034] An embodiment of the present invention provides a lift-off friction pendulum isolation bearing, as Figure 1 and Figure 3 shown, including an upper seat plate 100, a lower seat plate 200, and a spherical crown plate. The spherical crown plate is arranged between the upper seat plate 100 and the lower seat plate 200. Sliding plates 400 are arranged between the spherical crown plate and the upper seat plate 100, and between the spherical crown plate and the lower seat plate 200. The spherical crown plate includes an upper crown plate 310 and a lower crown plate 320. An elastic element 330 is arranged between the upper crown plate 310 and the lower crown plate 320. The elastic force of the elastic element 330 makes the upper crown plate 310 tend to move upward against its own weight. A limiting structure is also arranged between the upper crown plate 310 and the lower crown plate 320, and the limiting structure makes the upper crown plate 310 and the lower crown plate 320 relatively fixed in the horizontal direction.

[0035] Among them, Figure 1 is a side structural sectional view of the lift-off friction pendulum isolation bearing provided by the embodiment of the present invention, Figure 3 is a side structural sectional view of the spherical crown plate and the sliding plate 400 of the lift-off friction pendulum isolation bearing provided by the embodiment of the present invention, Figure 1 and Figure 3 do not draw sectional lines.

[0036] In this embodiment, the upper crown plate 310 and the lower crown plate 320 form the external structure of the spherical crown plate. An elastic element 330 is provided between the upper crown plate 310 and the lower crown plate 320. The elastic force of the elastic element 330 causes the upper crown plate 310 to have a tendency to move upward against its own weight, so that the upper crown plate 310, the sliding plate 400 and the upper seat plate 100 can always be in contact. When a vertical tensile force occurs, the upper seat plate 100 generates an upward displacement. At this time, the elastic force of the elastic element 330 is sufficient to overcome the weight of the upper crown plate 310, and the upper crown plate 310 can move synchronously with the upper seat plate 100. The sliding plate 400 is always in contact with both the upper seat plate 100 and the upper crown plate 310. When the upper seat plate 100 falls downward, the elastic element 330 can also play a buffering role. Therefore, during the occurrence of a vertical tensile force, there will be no violent impact between the upper crown plate 310 and the lower crown plate 320, and the sliding plate 400 will not be damaged by the impact, maintaining the seismic isolation function of the lift-off friction pendulum seismic isolation bearing.

[0037] The limiting structure between the upper crown plate 310 and the lower crown plate 320 makes the upper crown plate 310 and the lower crown plate 320 relatively fixed in the horizontal direction. When the spherical crown plate generates a lateral displacement between the upper seat plate 100 and the lower seat plate 200, there will be no relative movement between the upper crown plate 310 and the lower crown plate 320, thus ensuring that the sliding plate 400 can play a seismic isolation role. At the same time, the upper crown plate 310 and the lower crown plate 320 are relatively fixed in the horizontal direction, so as to ensure that the upper crown plate 310 will not have a horizontal displacement when moving in the vertical direction.

[0038] In this embodiment, as Figure 1 and Figure 3 shown, both the upper seat plate 100 and the lower seat plate 200 are provided with a swinging spherical surface, and a mirror stainless steel is provided on the spherical surface. The connection between the mirror stainless steel and the upper seat plate 100 and the lower seat plate 200 adopts forms such as embedding, anchoring, welding, etc. Among them, when the welding form is adopted, the influence of the welding shrinkage stress on the spherical deformation of the mirror stainless steel should be considered, and measures to eliminate the welding deformation should be taken. Correspondingly, the upper surface of the upper crown plate 310 and the lower surface of the lower crown plate 320 are also set as spherical surfaces, and the upper and lower surfaces of the sliding plate 400 are also set as spherical surfaces.

[0039] In other embodiments, the relatively arranged surfaces of the upper seat plate 100 and the upper crown plate 310, and the relatively arranged surfaces of the lower seat plate 200 and the lower crown plate 320 can also be set to other shapes. For example, the relatively arranged surfaces of the lower seat plate 200 and the lower crown plate 320 are both flat surfaces, and the relatively arranged surfaces of the upper seat plate 100 and the upper crown plate 310 are both spherical surfaces, etc.

[0040] The sliding plate 400 can specifically be a polymer sliding plate 400. The specific material of the polymer sliding plate 400 can be polymer materials such as polytetrafluoroethylene, ultra-high molecular weight polyethylene, polyoxymethylene, etc.

[0041] In this embodiment, as Figure 3 shown, the sliding plate 400 is fixed on the surfaces of the upper crown plate 310 and the lower crown plate 320, thus facilitating installation more conveniently. Specifically, the sliding plate 400 can be fixed on the surfaces of the upper crown plate 310 and the lower crown plate 320 by an embedding method. The two sliding plates 400 are respectively fixed on the upper surface and the lower surface of the spherical crown plate, and respectively form friction pairs with the mirror stainless steel of the upper seat plate 100 and the lower seat plate 200.

[0042] In this embodiment, as Figure 3 、 Figure 4 and Figure 6 shown, the limiting structure further includes a longitudinal limiting mechanism, and the longitudinal limiting mechanism defines the maximum stroke of the upward movement of the upper crown plate 310 relative to the lower crown plate 320. The longitudinal limiting mechanism includes a first longitudinal limiting portion 312 provided on the upper crown plate 310 and a second longitudinal limiting portion 322 provided on the lower crown plate 320, and the second longitudinal limiting portion 322 is located above the first longitudinal limiting portion 312. As Figure 3 、 Figure 4 and Figure 6 shown, in the state where the upper crown plate 310 and the lower crown plate 320 are completely attached, the gap between the first longitudinal limiting portion 312 and the second longitudinal limiting portion 322 constitutes the maximum stroke of the upward movement of the upper crown plate 310. This maximum stroke can be specifically designed according to the structural uplifting displacement required by the seismic isolation design result. The longitudinal limiting mechanism can also make the structure of the spherical crown plate relatively stable after installation, facilitating the connection and installation between the upper seat plate 100 and the lower seat plate 200.

[0043] In this embodiment, as Figure 3 、 Figure 4 and Figure 6 shown, the limiting structure includes a first horizontal limiting portion 313 provided on the upper crown plate 310 and a second horizontal limiting portion 333 provided on the lower crown plate 320. The first horizontal limiting portion 313 and the second horizontal limiting portion 333 are arranged oppositely in the horizontal direction, and the first horizontal limiting portion 313 and the second horizontal limiting portion 333 realize the relative fixation of the upper crown plate 310 and the lower crown plate 320 in the horizontal direction.

[0044] In this embodiment, as Figure 3 、 Figure 4 and Figure 6 shown, the limiting mechanism includes an upper flange plate 311 provided at the lower part of the upper crown plate 310 and a lower flange plate 321 provided at the upper part of the lower crown plate 320. The side surfaces of the upper flange plate 311 and the lower flange plate 321 are arranged oppositely, the upper end surfaces of the upper flange plate 311 and the lower flange plate 321 are arranged oppositely, and moreover, the upper end surface of the upper flange plate 311 is arranged below the lower end surface of the lower flange plate 321. More specifically, as Figure 3As shown, the inner side surface of the upper flange plate 311 and the outer side surface of the lower flange plate 321 are oppositely arranged. The inner side surface of the upper flange plate 311 constitutes the first horizontal limiting portion 313, the outer side surface of the lower flange plate 321 constitutes the second horizontal limiting portion 333, the upper cross-section of the upper flange plate 311 constitutes the first longitudinal limiting portion 312, and the lower end surface of the lower flange plate 321 constitutes the second longitudinal limiting portion 322.

[0045] In this embodiment, as Figure 5 and Figure 7 shown, at least two upper flange plates 311 and lower flange plates 321 are uniformly arranged along the circumferential direction, and the gap between the upper flange plates 311 allows the lower flange plates 321 to penetrate, and the gap between the lower flange plates 321 allows the upper flange plates 311 to penetrate. The upper crown plate 310 and the lower crown plate 320 can achieve an assembly method of rotational fixation after embedding, and the installation is portable. Moreover, the lift-off friction pendulum isolation bearing provided by the embodiment of the present invention will be subjected to the pressure of the building under normal conditions during application, and the upper seat plate 100, the sliding plate 400, the spherical crown plate, the sliding plate 400, and the lower seat plate 200 will be pressed together. Therefore, in the use state, the installation structure provided by this embodiment will not have a failure problem.

[0046] The specific position settings of the upper flange plate 311, the lower flange plate 321, the first longitudinal limiting portion 312, the second longitudinal limiting portion 322, the first horizontal limiting portion 313, and the second horizontal limiting portion 333 in this embodiment are only one implementation manner. On the premise of achieving the above limiting effect, the relative position relationship can be replaced.

[0047] In this embodiment, as Figure 1 and Figure 2 shown, it further includes a damping cable 500, and both ends of the damping cable 500 are respectively fixed in the upper seat plate 100 and the lower seat plate 200. Specifically, the two ends of the damping cable 500 can be fixed by an anchoring method. The upper seat plate 100 and the lower seat plate 200 can be preset with slot holes, and then the damping cable 500 is anchor-connected.

[0048] In this embodiment, as Figure 2 shown, a plurality of damping cables 500 are uniformly arranged in the circumferential direction. The present application does not limit the specific number of the damping cables 500, as long as they are uniformly arranged in the circumferential direction.

[0049] The damping cable 500 has a multi-strand rope structure. Under the action of a designed earthquake, the lift-off friction pendulum isolation bearing swings with the earthquake. At this time, friction is generated between the multiple strands of the damping cable 500, which can play a role in consuming the input earthquake energy; when the earthquake amplitude exceeds the designed earthquake, the damping cable 500 tightens, and the deformation of the damping cable 500 is used to provide an anti-overturning reaction force to the structure, ensuring the safety of the structure and reducing the risk of overturning.

[0050] Specifically, the length L of the damping cable 500 is L = L0 + 2L1, where L1 is the anchoring length of the end of the damping cable 500 anchored in the upper seat plate 100 or the lower seat plate 200, and L0 is the free length of the damping cable 500. The calculation formula for L0 is where L h is the horizontal design displacement of the structure under a major earthquake, and h0 is the height of the lift-off friction pendulum isolation bearing.

[0051] In this embodiment, as Figure 1 and Figure 3 shown, both the upper crown plate 310 and the lower crown plate 320 are provided with installation grooves 340, and the upper and lower ends of the elastic element 330 are respectively located in the installation grooves 340 of the upper crown plate 310 and the lower crown plate 320. As Figure 5 and Figure 7 shown, the installation grooves 340 can also be set as a plurality of circumferentially uniformly distributed ones.

[0052] The elastic element 330 can specifically be a spring, preferably a steel spring, etc., to meet the requirement that the elastic force can overcome the self-weight of the upper crown plate 310.

[0053] As Figure 2 shown, the upper seat plate 100 and the lower seat plate 200 are also provided with through holes for connecting with the building structure, so as to install the lift-off friction pendulum isolation bearing.

[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lift-off friction pendulum isolation bearing, comprising an upper seat plate (100), a lower seat plate (200) and a spherical crown plate, the spherical crown plate being arranged between the upper seat plate (100) and the lower seat plate (200), and sliding plates (400) being arranged between the spherical crown plate and the upper seat plate (100) and between the spherical crown plate and the lower seat plate (200), characterized in that, The spherical crown plate includes an upper crown plate (310) and a lower crown plate (320). An elastic element (330) is provided between the upper crown plate (310) and the lower crown plate (320). The elastic force of the elastic element (330) causes the upper crown plate (310) to have a tendency to move upward against its own weight. A limiting structure is also provided between the upper crown plate (310) and the lower crown plate (320), and the limiting structure makes the upper crown plate (310) and the lower crown plate (320) relatively fixed in the horizontal direction.

2. The lift-off friction pendulum isolation bearing according to claim 1, wherein, The limiting structure further includes a longitudinal limiting mechanism, and the longitudinal limiting mechanism defines the maximum stroke of the relative upward movement of the upper crown plate (310) with respect to the lower crown plate (320).

3. The lift-off friction pendulum isolation bearing according to claim 2, characterized in that, The longitudinal limiting mechanism includes a first longitudinal limiting portion (312) provided on the upper crown plate (310) and a second longitudinal limiting portion (322) provided on the lower crown plate (320), and the second longitudinal limiting portion (322) is located above the first longitudinal limiting portion (312).

4. The lift-off friction pendulum isolation bearing according to claim 1, wherein The limiting structure includes a first horizontal limiting portion (313) provided on the upper crown plate (310) and a second horizontal limiting portion (333) provided on the lower crown plate (320), and the first horizontal limiting portion (313) and the second horizontal limiting portion (333) are relatively arranged in the horizontal direction.

5. The lift-off friction pendulum isolation bearing according to claim 1, characterized in that, The limiting mechanism includes an upper flange plate (311) provided at the lower part of the upper crown plate (310) and a lower flange plate (321) provided at the upper part of the lower crown plate (320). The side surfaces of the upper flange plate (311) and the lower flange plate (321) are relatively arranged, and the upper end surface of the upper flange plate (311) and the lower end surface of the lower flange plate (321) are relatively arranged. Moreover, the upper end surface of the upper flange plate (311) is located below the lower end surface of the lower flange plate (321).

6. The lift-off friction pendulum isolation bearing according to claim 5, characterized in that, At least two upper flange plates (311) and at least two lower flange plates (321) are uniformly arranged along the circumferential direction, and the gaps between the upper flange plates (311) allow the lower flange plates (321) to penetrate, and the gaps between the lower flange plates (321) allow the upper flange plates (311) to penetrate.

7. The lift-off friction pendulum isolation bearing according to claim 1, wherein It further includes a damping cable (500), and the two ends of the damping cable (500) are respectively fixed in the upper seat plate (100) and the lower seat plate (200).

8. The lift-off friction pendulum isolation bearing according to claim 7, wherein At least two damping cables (500) are uniformly arranged in the circumferential direction.

9. The lift-off friction pendulum isolation bearing according to claim 7, characterized in that, The length L of the damped cable (500) is L = L0 + 2L1, where L1 is the anchorage length of the end of the damped cable (500) anchored in the upper seat plate (100) or the lower seat plate (200), L0 is the free length of the damped cable (500), and the calculation formula for L0 is where L h is the horizontal design displacement of the structure under a major earthquake, and h0 is the height of the friction pendulum isolation bearing that can be lifted off.

10. The lift-off friction pendulum isolation bearing according to claim 1, wherein, Both the upper crown plate (310) and the lower crown plate (320) are provided with mounting grooves (340), and the upper and lower ends of the elastic element (330) are respectively located in the mounting grooves (340) of the upper crown plate (310) and the lower crown plate (320).

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