A friction pendulum support with displacement locking function

Abstract

The utility model provides a friction pendulum bearing with displacement locking function, which belongs to the technical field of bridge bearings. The bearing includes an upper seat plate, a spherical crown lining plate, an intermediate lining plate, a locking assembly and a lower seat plate. From top to bottom, an upper spherical rotation pair, a lower spherical rotation pair and a plane sliding pair are formed between the upper seat plate, the spherical crown lining plate, the intermediate lining plate and the lower seat plate respectively; the lower end of the intermediate lining plate has a mounting portion; a working window is provided on the mounting portion; the locking assembly is cooperatively arranged in the working window; a limited position through groove is provided on the upper surface of the lower seat plate; in the case of an earthquake, when the plane of the lower end of the intermediate lining plate slides to coincide with the working window and the limited position through groove, the locking assembly extends from the working window and is inserted into the limited position through groove to lock the relative movement between the intermediate lining plate and the lower seat plate. The utility model can adapt to the load-bearing, displacement and rotation function requirements of the bridge under normal circumstances, can lock the translation stroke during an earthquake, and use the hyperbolic surface to reduce shock and dissipate energy. There is no translation stroke during the energy dissipation process, and the energy dissipation capacity is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge bearings, in particular to a friction pendulum bearing with a displacement locking function. Background Art

[0002] With the continuous development of transportation construction, more and more transportation lines are being built. Some bridge projects need to pass through high-intensity earthquake areas, so the seismic performance requirements of bridges built in such areas are also higher. Friction pendulum bearings, as a new type of seismic isolation device, have been widely used in the field of bridge construction in recent years. Commonly used friction pendulum bearings are mainly hyperbolic structures, and their working mechanism is similar to that of a pendulum. During an earthquake, they use the friction between the curved surfaces to achieve energy dissipation and extend the vibration period of the system, thereby achieving the function of seismic isolation. However, the bearings of this structure will cause the beam end to rise during the sliding process, affecting the smoothness of the entire line. For example, if a plane sliding surface is added on the basis of the hyperbolic structure, it can solve the problem of beam end elevation under normal displacement conditions, but in the case of an earthquake, a translation stroke will be generated, affecting the energy dissipation effect of the bearing. In order to solve the translation stroke problem, some products add speed lockers on both sides of the bearing plane sliding surface to lock the translation stroke during an earthquake, but the addition of the speed locker greatly increases the size and cost of the product. Utility Model Content

[0003] The utility model aims to provide a friction pendulum bearing with a displacement locking function, which can adapt to the load-bearing, displacement and rotation function requirements of the bridge under normal circumstances, can lock the translation stroke during an earthquake, and perform shock absorption and energy consumption through a hyperbolic surface. There is no translation stroke during the energy consumption process, and the energy consumption capacity is strong.

[0004] The technical solution adopted by the utility model is:

[0005] A friction pendulum support with a displacement locking function, comprising:

[0006] A spherical crown lining plate, wherein the spherical crown lining plate is a hyperbolic structure;

[0007] An upper seat plate, wherein the middle area of ​​the lower end surface of the upper seat plate has a first spherical crown surface that matches the upper curved surface of the spherical crown lining plate and forms an upper spherical surface rotation pair with the spherical crown lining plate;

[0008] An intermediate liner, wherein the middle area of ​​the upper end surface of the intermediate liner has a second spherical crown surface that matches the lower curved surface of the spherical crown liner, and forms a lower spherical rotation pair with the spherical crown liner; the lower end surface of the intermediate liner is a plane; the lower end of the upper end side wall of the intermediate liner extends horizontally to form a rectangular plate-shaped mounting portion; at least one working window is provided on the mounting portion located on both sides of the plane sliding direction; the length direction of the working window is a direction perpendicular to the plane sliding direction;

[0009] A locking component, the locking component is cooperatively arranged in the working window;

[0010] A lower seat plate, the lower seat plate is located below the middle liner and forms a plane sliding pair with the middle liner; the upper surface of the lower seat plate has limit slots on both sides of the plane sliding direction; the limit slots have a length direction perpendicular to the plane sliding direction;

[0011] Among them, under normal circumstances, the locking assembly is received in the working window; in the event of an earthquake, when the lower end plane of the intermediate lining slides until the working window and the limiting slot coincide, a part of the locking assembly extends from the working window and is inserted into the limiting slot, thereby locking the relative movement between the intermediate lining and the lower seat plate.

[0012] Furthermore, an upper spherical surface slide plate is provided between the upper seat plate and the spherical crown lining plate;

[0013] And / or, a lower spherical slide plate is provided between the spherical crown lining plate and the intermediate lining plate;

[0014] And / or, a flat slide plate and a stainless steel plate are provided between the middle lining plate and the lower seat plate.

[0015] Furthermore, limiting blocks are arranged on both sides of the plane sliding direction and on both sides perpendicular to the plane sliding direction around the upper surface of the lower seat plate; the limiting through groove is located in the area surrounded by four limiting blocks.

[0016] Furthermore, the outer sides of the first spherical crown surface on both sides of the plane sliding direction of the lower end face of the upper seat plate are respectively provided with limit blocks; the limit blocks are arranged in a direction perpendicular to the plane sliding direction, and are connected to the upper seat plate by shear pins; the upper end outer wall of the intermediate lining plate extends horizontally along the plane sliding direction to form an end plate portion; the end plate portion and the corresponding limit blocks are adjacent to each other to form a limit.

[0017] Furthermore, an annular shearing groove is provided on the rod portion of the anti-shear pin; the annular shearing groove is located at the junction of the limit stop block and the upper seat plate.

[0018] Furthermore, a buffer is provided at the edge of the first spherical crown surface.

[0019] Furthermore, the locking assembly comprises:

[0020] A cover plate, the cover plate is detachably connected to the mounting portion and covers the working window;

[0021] A card block, the card block is cooperatively arranged in the working window;

[0022] An elastic element is arranged between the cover plate and the clamping block.

[0023] Furthermore, a mounting hole is provided on the upper surface of the clamping block; a part of the elastic element is cooperatively disposed in the mounting hole.

[0024] Furthermore, a slide bar is embedded in the lower surface of the card block.

[0025] The beneficial effects of the utility model are:

[0026] The utility model provides a friction pendulum bearing with displacement locking function, which includes a spherical crown lining, an upper seat plate, an intermediate lining, a locking assembly and a lower seat plate. From top to bottom, an upper spherical rotation pair, a lower spherical rotation pair and a plane sliding pair are formed between the upper seat plate, the spherical crown lining, the intermediate lining and the lower seat plate. The lower end of the intermediate lining has a mounting portion; a working window is provided on the mounting portion; the locking assembly is cooperatively arranged in the working window; the upper surface of the lower seat plate has a limiting groove; in the case of an earthquake, when the lower end plane of the intermediate lining slides to the point where the working window and the limiting groove coincide, a part of the locking assembly extends from the working window and snaps into the limiting groove to lock the relative movement between the intermediate lining and the lower seat plate. The friction pendulum bearing in the utility model can adapt to the load-bearing, displacement and rotation function requirements of the bridge under normal circumstances, can lock the translation stroke during an earthquake, and use the hyperbolic surface to reduce shock and dissipate energy. There is no translation stroke during the energy dissipation process, and the energy dissipation capacity is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a cross-sectional view of the friction pendulum support with displacement locking function in the plane sliding direction of this embodiment.

[0029] Figure 2 for Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0030] Figure 3 for Figure 1 Schematic diagram of the local enlarged structure at point B in the middle.

[0031] Figure 4 2 is a top view of the lower seat plate in this embodiment.

[0032] Figure 5 1 is a top view of the middle lining plate in this embodiment.

[0033] Figure 6 A top view of the card block in this embodiment.

[0034] The accompanying drawings are marked as follows:

[0035] 100-upper seat plate, 200-ball crown lining plate, 300-middle lining plate, 400-lower seat plate, 500-locking assembly, 600-limit stopper, 700-shear pin;

[0036] 110 - first spherical crown surface, 111 - buffer member;

[0037] 210-upper spherical slide, 220-lower spherical slide;

[0038] 310 - second spherical crown surface, 320 - mounting portion, 321 - working window, 330 - plane slide plate, 340 - end panel;

[0039] 410-limiting slot, 420-limiting block, 430-stainless steel plate;

[0040] 510-cover plate, 520-tightening bolt, 530-block, 540-elastic element, 541-mounting hole, 550-slide bar;

[0041] 710-rod, 711-circumferential shear groove. DETAILED DESCRIPTION

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0044] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0045] Figure 1 : is a cross-sectional view of the friction pendulum support with displacement locking function in the plane sliding direction of this embodiment. Figure 1 As shown in , the friction pendulum bearing with displacement locking function includes an upper seat plate 100, a spherical crown lining plate 200, an intermediate lining plate 300 and a lower seat plate 400. The spherical crown lining plate 200 is a convex hyperbolic structure. The upper seat plate 100 is connected to the corresponding beam body through an anchoring assembly. The middle area of ​​the lower end face of the upper seat plate 100 has a first spherical crown surface 110 that matches the upper curved surface of the spherical crown lining plate 200. As a result, an upper spherical rotation pair is formed between the upper seat plate 100 and the spherical crown lining plate 200. The middle area of ​​the upper end face of the intermediate lining plate 300 also has a second spherical crown surface 310 that matches the lower curved surface of the spherical crown lining plate 200. As a result, a lower spherical rotation pair is formed between the spherical crown lining plate 200 and the intermediate lining plate 300. The lower end face of the intermediate lining plate 300 and the upper end face of the lower seat plate 400 are matching planes. Thus, a plane sliding pair is formed between the middle lining plate 300 and the lower seat plate 400 .

[0046] Figure 4 In order to lock the translational travel in the event of an earthquake, in this embodiment, a limiting slot 410 is provided on both sides of the plane sliding direction of the upper surface of the lower seat plate 400, and the length direction of the limiting slot 410 is perpendicular to the plane sliding direction. Figure 4 As shown in . At the same time, the lower end of the middle lining plate 300 extends horizontally to form a rectangular plate-shaped mounting portion 320. At least one working window 321 is provided on the mounting portions 320 located on both sides of the plane sliding direction, and the length direction of the working window 321 is a direction perpendicular to the plane sliding direction, and the width of the working window 321 is equal to or slightly smaller than the slot width of the limiting through slot 410. A locking assembly 500 is provided in the working window 321. Under normal circumstances, the locking assembly 500 is received in the working window 321. When the beam body moves, the upper seat plate 100 drives the middle lining plate 300 to slide horizontally within the sliding range on the lower seat plate 400, and the upper spherical swivel pair and the lower spherical swivel pair rotate slightly to adapt to the rotation of the bridge to avoid the beam end from lifting. When the horizontal displacement of the support exceeds the designed displacement during an earthquake, and the lower plane of the middle lining plate 300 slides until the working window 321 coincides with the limiting groove 410, a portion of the locking assembly 500 extends from the working window 321 and is inserted into the limiting groove 410, thereby locking the relative movement between the middle lining plate 300 and the lower seat plate 400 and transmitting the seismic force to the upper seat plate 100.

[0047] The friction pendulum bearing in this embodiment has a low manufacturing cost and can adapt to the load-bearing, displacement and rotation functional requirements of the bridge under normal circumstances. It can lock the translational stroke during an earthquake and use the hyperbolic surface to reduce shock and dissipate energy. There is no translational stroke during the energy dissipation process, and the energy dissipation capacity is strong.

[0048] As attached Figure 1As shown in the figure, in this embodiment, an upper spherical slide plate 210 is provided between the upper seat plate 100 and the spherical crown lining plate 200. The upper spherical slide plate 210 is connected to the spherical crown lining plate 200 as a whole, and forms an upper spherical rotation pair with the upper seat plate 100. A lower spherical slide plate 220 is also provided between the spherical crown lining plate 200 and the intermediate lining plate 300. The lower spherical slide plate 220 is connected to the spherical crown lining plate 200 as a whole, and forms a lower spherical rotation pair with the intermediate lining plate 300. A plane slide plate 330 and a stainless steel plate 430 are provided between the intermediate lining plate 300 and the lower seat plate 400. The plane slide plate 330 is connected to the intermediate lining plate 300 as a whole, and the stainless steel plate 430 is laid in the area between the two limiting through grooves 410 and the lower seat plate 400. A plane sliding pair is formed between the plane slide plate 330 and the stainless steel plate 430. The upper spherical slide plate 210, the lower spherical slide plate 220, and the plane slide plate 330 in this embodiment can be made of self-lubricating materials such as polytetrafluoroethylene to reduce the friction coefficient and meet the rotation and sliding requirements of the support.

[0049] In this embodiment, limit blocks 420 are arranged on both sides of the plane sliding direction and on both sides perpendicular to the plane sliding direction around the upper surface of the lower seat plate 400. The limit blocks 420 are roughly in the shape of a quadrangular prism. The limit slot 410 is located in the area surrounded by the four limit blocks 420. The limit blocks 420 in this embodiment can guide and limit the sliding of the support, and play a certain role in preventing the beam from falling in the event of an earthquake.

[0050] Figure 2 for Figure 1 Schematic diagram of the local enlarged structure at point A in the middle. Figure 5 1 is a top view of the middle lining plate in this embodiment. In this embodiment, the outer sides of the first spherical crown surfaces 110 on both sides perpendicular to the plane sliding direction of the lower end surface of the upper seat plate 100 are respectively provided with limit blocks 600, as shown in the attached Figure 1 and attached Figure 2 The limit stopper 600 is arranged in a direction perpendicular to the plane sliding direction and connected to the upper seat plate 100 by the shear pin 700 as a whole. The upper end outer wall of the intermediate liner 300 extends horizontally in a direction perpendicular to the plane sliding direction to form an end plate portion 340, as shown in the attached Figure 5 As shown in . The side wall of the end plate 340 is adjacent to the side wall of the corresponding limit stopper 600, and there is a small gap between the two. The upper surface of the end plate 340 is flush with or slightly lower than the upper surface of the limit stopper 600. In this embodiment, the intermediate lining plate 300 is limited by the limit stopper 600, so that the swing surface of the support curved surface does not work during normal use; during an earthquake, the shear pin 700 is sheared off and fails under the action of the earthquake force, the limit of the limit stopper 600 is released, and the upper spherical rotation pair and the lower spherical rotation pair form a swing pair, realizing the shock absorption and energy dissipation function of the support.

[0051] As attached Figure 2As shown in the figure, an annular shearing groove 711 is provided on the rod portion 710 of the shear pin 700 in this embodiment. The annular shearing groove 711 is located at the junction of the limit stopper 600 and the upper seat plate 100. In this embodiment, the annular shearing groove 711 and its size design can accurately identify the earthquake force, release the limit stopper 600 in time, and realize the bearing shock absorption function.

[0052] In this embodiment, a buffer member 111 is provided at the edge of the first spherical crown surface 110. Figure 1 As shown in . The buffer member 111 can be made of flexible materials such as rubber. When the support swings to the limit position, the buffer member 111 can buffer and play a certain role in dropping the beam.

[0053] In this embodiment, the length of the working window 321 is much greater than its width, and its length is 1 / 5 to 9 / 20 of the length of the limiting through slot 410. The number of working windows 321 located on the same side of the plane sliding direction is 1 to 3. The locking assembly 500 is shaped to match the working window 321 to ensure a better locking effect. Figure 5 As shown in , each mounting portion 320 is provided with two working windows 321. The length of each working window 321 is approximately 8 / 25 of the length of the limiting through slot 410.

[0054] Figure 3 for Figure 1 In this embodiment, the locking assembly 500 includes a cover plate 510, a clamping bolt 520, a clamping block 530 and an elastic element 540. Figure 3 As shown in . The length and width of the cover plate 510 are larger than the length and width of the working window 321, and the mounting portion 320 is connected to the cover plate 510 from both sides of the length direction through the clamping bolts 520. The length and width of the block 530 are consistent with the length and width of the working window 321, and are arranged in the working window 321. The elastic element 540 is a spring, a disc spring, etc., which is located between the cover plate 510 and the upper surface of the block 530 to always provide a downward tightening force for the block 530. At the same time, in this embodiment, the size of the tightening force of the elastic element 540 can be adjusted by screwing the clamping bolts 520. When there are more than two locking assemblies 500 located on the same side of the plane sliding direction, the cover plate 510 can be shared, that is, a larger cover plate 510 is used to cover all the working windows 321.

[0055] Under normal circumstances, when the beam moves, the upper seat plate 100 drives the middle lining plate 300 to slide horizontally within the sliding range on the lower seat plate 400, and the upper spherical rotation pair and the lower spherical rotation pair rotate slightly to adapt to the rotation of the bridge; in the case of an earthquake, when the horizontal displacement of the bearing exceeds the design displacement, the lower end plane of the middle lining plate 300 slides to coincide with the working window 321 and the limiting slot 410, the block 530 extends from the working window 321 under the action of the elastic element 540 and its own gravity, and the lower part of the block 530 is stuck in the limiting slot 410, and the upper part of the block 530 is still located in the working window 321, thereby limiting the relative sliding between the lower seat plate 400 and the middle lining plate 300, and transmitting the earthquake force to the upper seat plate 100. When the shear pin 700 fails to shear, the upper spherical rotation pair and the lower spherical rotation pair form a swing pair to realize the shock absorption and energy dissipation function of the bearing. Since the block 530 limits the relative displacement between the lower seat plate 400 and the middle lining plate 300, the support only swings without plane sliding during earthquake energy dissipation, thus ensuring the energy dissipation capacity of the support. After the earthquake, the block 530 can be removed from the slot of the lower seat plate 400 to restore the plane sliding function of the support, which is convenient and easy to restore.

[0056] Figure 6 The top view of the block in this embodiment. Figure 6 As shown in FIG. 1 , in order to prevent the elastic element 540 from moving, a mounting hole 541 is provided on the upper surface of the block 530 in this embodiment. A portion of the elastic element 540 is arranged in the mounting hole 541. At the same time, since the block 530 has a certain length, 2 to 5 elastic elements 540 can be arranged at the same time and evenly distributed to ensure that the elastic element 540 exerts a tightening force on the entire block 530. Figure 6 As shown in FIG. 1 , three mounting holes 541 are formed on the upper surface of the block 530 , and three elastic elements 540 are also formed.

[0057] In this embodiment, in order to reduce the friction between the block 530 and the lower seat plate 400 or the stainless steel plate 430 and prevent the lower seat plate 400 or the stainless steel plate 430 from being scratched, a slide bar 550 is embedded in the lower surface of the block 530. A planar sliding pair is formed between the slide bar 550 and the lower seat plate 400 or the stainless steel plate 430.

Claims

1. A friction pendulum support with displacement locking function, characterized in that: include: A spherical crown lining plate, wherein the spherical crown lining plate is a hyperbolic structure; An upper seat plate, wherein the middle area of ​​the lower end surface of the upper seat plate has a first spherical crown surface that matches the upper curved surface of the spherical crown lining plate and forms an upper spherical surface rotation pair with the spherical crown lining plate; An intermediate liner, wherein the middle area of ​​the upper end surface of the intermediate liner has a second spherical crown surface that matches the lower curved surface of the spherical crown liner, and forms a lower spherical rotation pair with the spherical crown liner; the lower end surface of the intermediate liner is a plane; the lower end of the upper end side wall of the intermediate liner extends horizontally to form a rectangular plate-shaped mounting portion; at least one working window is provided on the mounting portion located on both sides of the plane sliding direction; the length direction of the working window is a direction perpendicular to the plane sliding direction; A locking component, the locking component is cooperatively arranged in the working window; A lower seat plate, the lower seat plate is located below the middle liner and forms a plane sliding pair with the middle liner; the upper surface of the lower seat plate has limit slots on both sides of the plane sliding direction; the limit slots have a length direction perpendicular to the plane sliding direction; Among them, under normal circumstances, the locking assembly is received in the working window; in the event of an earthquake, when the lower end plane of the intermediate lining slides until the working window and the limiting slot coincide, a part of the locking assembly extends from the working window and is inserted into the limiting slot, thereby locking the relative movement between the intermediate lining and the lower seat plate.

2. The friction pendulum support with displacement locking function according to claim 1, characterized in that: An upper spherical surface slide plate is provided between the upper seat plate and the spherical crown lining plate; And / or, a lower spherical slide plate is provided between the spherical crown lining plate and the intermediate lining plate; And / or, a flat slide plate and a stainless steel plate are provided between the middle lining plate and the lower seat plate.

3. The friction pendulum support with displacement locking function according to claim 1, characterized in that: Limiting blocks are arranged on both sides of the plane sliding direction and on both sides perpendicular to the plane sliding direction around the upper surface of the lower seat plate; the limiting through groove is located in the area surrounded by the four limiting blocks.

4. The friction pendulum support with displacement locking function according to claim 1, characterized in that: The outer sides of the first spherical crown surface on both sides of the plane sliding direction of the lower end face of the upper seat plate are respectively provided with limit blocks; the limit blocks are arranged in a direction perpendicular to the plane sliding direction, and are connected to the upper seat plate by shear pins; the upper end outer wall of the middle lining plate extends horizontally along the plane sliding direction to form an end plate portion; the end plate portion and the corresponding limit blocks are adjacent to each other to form a limit.

5. The friction pendulum support with displacement locking function according to claim 4, characterized in that: An annular shearing groove is provided on the rod portion of the anti-shear pin; the annular shearing groove is located at the junction of the limit stopper and the upper seat plate.

6. The friction pendulum support with displacement locking function according to claim 1, characterized in that: A buffer is provided at the edge of the first spherical crown surface.

7. The friction pendulum support with displacement locking function according to any one of claims 1 to 6, characterized in that: The locking assembly comprises: A cover plate, the cover plate is detachably connected to the mounting portion and covers the working window; A card block, the card block is cooperatively arranged in the working window; An elastic element is arranged between the cover plate and the clamping block.

8. The friction pendulum support with displacement locking function according to claim 7, characterized in that: A mounting hole is formed on the upper surface of the clamping block; a part of the elastic element is cooperatively arranged in the mounting hole.

9. The friction pendulum support with displacement locking function according to claim 8, characterized in that: A slide bar is embedded in the lower surface of the card block.

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