Anti-overturning and anti-beam-falling friction pendulum support

Abstract

The utility model relates to an anti-overturning and anti-beam-falling friction pendulum support, and belongs to the technical field of bridge shock absorption and isolation. Comprising an upper support plate, a lower support plate, a damping ball pendulum, a shear pin, an upper limiting pin shaft and a lower limiting pin shaft, a through hole is formed in the middle of the damping ball pendulum, and an annular groove is formed in the inner wall of the damping ball pendulum hole; the upper limiting pin shaft and the lower limiting pin shaft penetrate through the holes and extend into the annular groove; pin shaft sliding plates are arranged between the upper limiting pin shaft and the inner wall of the annular groove and between the lower limiting pin shaft and the inner wall of the annular groove; the upper limiting pin shaft and the lower limiting pin shaft are oppositely arranged in the center of the inner surface of the upper support plate and the center of the inner surface of the lower support plate correspondingly, and a certain distance is reserved between the upper limiting pin shaft and the lower limiting pin shaft in the space formed by the hole and the annular groove in the relative vertical direction. The shear pin is arranged between the bottom of the outer edge of the upper support plate and the outer edge of the lower support plate; the inner surface of the shear pin abuts against the outer edge of the lower support plate. The device has the functions of limiting, beam falling prevention and overturning resistance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a friction pendulum support, in particular to an anti-overturning anti-falling beam friction pendulum support and belongs to the technical field of bridge shock mitigation and isolation. BACKGROUND

[0002] With the development of the traffic infrastructure industry in China, various types of railway and highway bridges are also numerous, and the safety reliability and functional practicability of the bridge system are increasingly strict. In recent years, earthquakes frequently occur in many places in China, and most of them are small earthquakes and micro earthquakes. The conventional friction pendulum shock mitigation and isolation support realizes the shock mitigation and isolation function by consuming displacement, and usually cannot play a role in shock mitigation and isolation protection of the bridge system under small earthquakes and micro earthquakes. For example, CN203451989U discloses a friction pendulum shock isolation support with self-detection function, which comprises an upper support plate, an upper hinged sliding block, a lower hinged sliding block and a lower support plate arranged in sequence from top to bottom. The upper surface of the upper hinged sliding block is arc-shaped, has the same curvature radius as the sliding surface of the lower surface of the upper support plate, and is in contact with the sliding surface. The lower part of the upper hinged sliding block is provided with a concave spherical surface, which is matched with and in contact with the convex spherical surface provided on the upper part of the lower hinged sliding block. The lower surface of the lower hinged sliding block is arc-shaped, has the same curvature radius as the sliding surface of the upper surface of the lower support plate, and is in contact with the sliding surface. CN204252309U discloses a particle damper capable of automatic homing, which comprises a damper cavity, a particle group, a buffer material and a multi-stage friction pendulum support. The above-mentioned patents cannot play a role in anti-falling beam under the action of large earthquakes, and also cannot play a role in limiting and vertical tension. Therefore, it is urgent to propose a new friction pendulum shock mitigation and isolation support for solving the above-mentioned problems. CONTENT OF THE UTILITY MODEL

[0003] In view of the above-mentioned defects existing in the prior art, the utility model provides an anti-overturning anti-falling beam friction pendulum support. The support can realize the temperature change displacement function of the bridge under the action of conventional temperature change force, and can produce different shock mitigation and isolation displacements through the shear pin and the upper and lower limiting devices according to different sudden changes (earthquake force) when the sudden change (earthquake force) occurs, and has the functions of anti-falling beam and anti-overturning, so as to realize the protection of the bridge system in multiple aspects.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] An anti-overturning anti-falling beam friction pendulum support comprises an upper support plate, a lower support plate and a shock-absorbing ball pendulum between the two, and further comprises a shear pin, an upper limiting pin shaft and a lower limiting pin shaft.

[0006] The damping ball pendulum middle part is provided with a through hole, and the damping ball pendulum hole inner wall is provided with an annular groove; the upper and lower limiting pin shafts penetrate into the hole and extend into the annular groove; the upper and lower limiting pin shafts and the annular groove inner wall are provided with a pin shaft sliding plate therebetween;

[0007] The upper and lower limiting pin shafts are respectively arranged opposite to the central inner surfaces of the upper and lower support plates, and the upper and lower limiting pin shafts are vertically reserved a certain distance in the space formed by the hole and the annular groove.

[0008] The shear pin is arranged between the outer edge bottom of the upper support plate and the outer edge of the lower support plate, and the inner surface of the shear pin abuts against the outer edge of the lower support plate.

[0009] Further, the upper and lower limiting pin shafts are T-shaped in cross section, including a connecting part and a disc end face.

[0010] Further, the connecting part penetrates the central positions of the upper and lower support plates and is fixed to the outer surfaces of the upper and lower support plates by the tension bolts.

[0011] Further, the disc end faces of the upper and lower limiting pin shafts extend into and are located in the annular groove, and the upper and lower disc end faces are arranged opposite to each other, the back surfaces of each disc end face are arc-shaped, the radii of the arc-shaped surfaces are consistent with the radii of the upper and lower wall surfaces of the annular groove, and the outer edges of the disc end faces are reserved a certain distance from the annular groove.

[0012] Further, the pin shaft sliding plate is located between the back surfaces of the disc end faces and the upper and lower wall surfaces of the annular groove, and the pin shaft sliding plate is a circular ring and is embedded in the annular groove of the back surface of the disc end face.

[0013] Further, the upper and lower support plates and the damping ball pendulum are respectively provided with upper and lower spherical surface friction pairs.

[0014] Further, the upper spherical surface friction pair is composed of the upper support arc-shaped metal friction plate of the inner bottom surface of the upper support plate and the arc-shaped upper spherical surface sliding plate arranged on the upper surface of the damping ball pendulum, and the lower spherical surface friction pair is composed of the lower support arc-shaped metal friction plate of the inner top surface of the lower support plate and the arc-shaped lower spherical surface sliding plate arranged on the upper surface of the damping ball pendulum.

[0015] Further, the upper and lower spherical surface sliding plates are arranged in the arc-shaped grooves on the upper and lower surfaces of the damping ball pendulum.

[0016] Further, the inner surfaces of the shear pins are provided with friction steel plates at the abutting positions with the outer edges of the lower support plates.

[0017] Further, the shear pins are fixed to the lower surfaces of the upper support plates by bolts.

[0018] Compared with the prior art, the anti-overturning and anti-falling beam friction pendulum support has the following beneficial effects:

[0019] The anti-overturning and anti-falling beam friction pendulum support can protect the bridge system in different stress states and has the functions of anti-overturning and anti-falling beam. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the anti-overturning and anti-falling beam friction pendulum support of the utility model;

[0021] Figure 2 is a schematic view of another anti-overturning and anti-falling beam friction pendulum support of the utility model. DETAILED DESCRIPTION

[0022] The utility model will be further described in detail in combination with the drawings and specific embodiments, so that the utility model can be clearly understood, but they do not constitute limitation on the utility model. Figures 1-2 The utility model will be further described in detail in combination with the drawings and specific embodiments, so that the utility model can be clearly understood, but they do not constitute limitation on the utility model.

[0023] In the description of the utility model, it should be explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as a limitation on the utility model.

[0024] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, or electrically connected, can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] Example 1

[0026] As shown in the accompanying drawings Figure 1 The anti-overturning and anti-falling beam friction pendulum bearing of the embodiment includes an upper bearing plate 1, a lower bearing plate 5, and a damping spherical pendulum 3 between the upper bearing plate 1 and the lower bearing plate 5. An upper spherical surface friction pair and a lower spherical surface friction pair are respectively arranged between the upper bearing plate 1, the lower bearing plate 5, and the damping spherical pendulum 3. The upper spherical surface friction pair is composed of an upper bearing arc-shaped metal friction plate 101 on the inner bottom surface of the upper bearing plate 1 and an arc-shaped upper spherical surface sliding plate 2 arranged on the upper surface of the damping spherical pendulum 3. The lower spherical surface friction pair is composed of a lower bearing arc-shaped metal friction plate 111 on the inner top surface of the lower bearing plate 5 and an arc-shaped lower spherical surface sliding plate 6 arranged on the upper surface of the damping spherical pendulum 3. The upper spherical surface sliding plate 2 and the lower spherical surface sliding plate 6 are arranged in the arc-shaped grooves on the upper and lower surfaces of the damping spherical pendulum 3.

[0027] The anti-overturning and anti-falling beam friction pendulum bearing of the embodiment further includes a shear pin 9, an upper limiting pin shaft 4, and a lower limiting pin shaft 8. Specifically, in the embodiment, a through hole 31 is arranged in the middle of the damping spherical pendulum 3, and an annular groove 32 is arranged on the inner wall of the through hole of the damping spherical pendulum 3. The upper limiting pin shaft 4 and the lower limiting pin shaft 8 pass through the through hole 31 and extend into the annular groove 32. A pin shaft sliding plate 48 is arranged between the upper limiting pin shaft 4, the lower limiting pin shaft 8, and the inner wall of the annular groove 32.

[0028] The upper limiting pin shaft 4 and the lower limiting pin shaft 8 are respectively arranged at the center of the inner surfaces of the upper bearing plate 1 and the lower bearing plate 5, and a certain distance is vertically reserved between the upper limiting pin shaft 4 and the lower limiting pin shaft 8 in the space formed by the through hole 31 and the annular groove 32.

[0029] As shown in the accompanying drawings Figure 1 The upper limiting pin shaft 4 and the lower limiting pin shaft 8 are T-shaped in cross section, including a connecting part 400 and a disc end face 700. The connecting part 400 passes through the central positions of the upper bearing plate 1 and the lower bearing plate 5 and is fixed to the outer surfaces of the upper bearing plate 1 and the lower bearing plate 5 by one tension bolt 7 respectively. The disc end face 700 of the upper limiting pin shaft 4 and the lower limiting pin shaft 8 extends into and is located in the annular groove 32. The upper and lower disc end faces 700 are arranged oppositely, and the back surface of each disc end face 700 is arc-shaped, with the curvature being consistent with the curvature of the upper and lower walls of the annular groove 32 of the damping spherical pendulum 3. The outer edge of the disc end face 700 is reserved a certain distance from the annular groove 32.

[0030] In the embodiment, the pin shaft sliding plate 48 is located between the back surface of the disc end face 700 and the upper and lower walls of the annular groove 32. The pin shaft sliding plate 48 is a circular ring and is embedded in the annular groove on the back surface of the disc end face 700.

[0031] The shear pin 9 is arranged between the outer edge bottom of the upper support plate 1 and the outer edge of the lower support plate 5 and is fixed on the lower surface of the upper support plate 1 by bolts. The inner surface of the shear pin 9 abuts against the outer edge of the lower support plate 5. As shown in Figure 1 the inner surface of the shear pin 9 abuts against the outer edge of the lower support plate 5, friction steel plates 200 are arranged at the abutting positions.

[0032] Under the conditions of small earthquakes and micro earthquakes, the shear pin 9 arranged between the upper support plate and the lower support plate is used for limiting, and the sudden change earthquake force is resisted by the elastic deformation of the shear pin. After the small earthquake, the deformation of the shear pin 9 can be automatically restored, and the shear pin does not need to be replaced, thereby reducing the maintenance cost.

[0033] Under the conditions of medium earthquakes, the earthquake energy is consumed by the yield deformation of the shear pin 9.

[0034] When a large earthquake occurs, the shear pin 9 is sheared, the beam body is isolated from the pier, most of the earthquake energy cannot be transmitted from the pier to the beam body, the support enters the seismic mitigation state, and the upper and lower spherical surface friction pairs of the seismic mitigation ball pendulum 3 are designed as equal spherical surfaces, so that the stress surface always corresponds, the support is uniformly stressed, and the service life of the support is prolonged. When the actual earthquake exceeds the target, the connecting part 400 arranged on the upper limiting pin shaft 4 and the lower limiting pin shaft 8 and the disc end surface 700 are in contact with the inner wall of the hole 31 and the bottom surface of the annular groove 32 on the seismic mitigation ball pendulum 3, the maximum displacement of the support is limited, and the function of preventing the beam from falling is achieved. In the embodiment, the reserved distance between the outer wall of the connecting part 400 and the inner wall of the hole 31 is equal to the reserved distance between the disc end surface 700 and the inner wall of the bottom surface of the annular groove 32.

[0035] The disc end surface 700 on the upper limiting pin shaft 4 and the lower limiting pin shaft 8 extends into the annular groove 32, when the structure reaches the limit position, the disc end surface 700 is pulled but is limited in the annular groove 32 and cannot be pulled out, thereby playing the role of resisting tension, overturning and tilting.

[0036] Embodiment 2

[0037] As shown in Figure 2 the connecting part 400 passes through the central positions of the upper support plate 1 and the lower support plate 5 and is fixed on the outer surfaces of the upper support plate 1 and the lower support plate 5 by two tension bolts 7, thereby improving the tension resistance. The other structural members and the connection are the same as those in Embodiment 1, and details are not described herein.

[0038] The above is only a preferred embodiment of the utility model, and does not limit the structure of the utility model in any form. The arrangement type and the use quantity of the utility model are not limited to the example, and can be optimized and selected according to the engineering practice. Any modification, equivalent change and decoration of the above embodiment according to the technical principle of the utility model, which does not deviate from the technical scheme of the utility model, is still within the scope of the technical scheme of the utility model.

Claims

1. An anti-overturning anti-collapse friction pendulum bearing comprising an upper bearing plate (1), a lower bearing plate (5) and a shock-absorbing spherical pendulum (3) between them, characterized in that: The friction pendulum seismic isolation support further comprises a shear pin (9), an upper limiting pin shaft (4), and a lower limiting pin shaft (8); The damping pendulum (3) is provided with a through hole (31) in the middle, and the inner wall of the hole is provided with an annular groove (32); the upper limiting pin shaft (4) and the lower limiting pin shaft (8) pass through the hole (31) and extend into the annular groove (32); the upper limiting pin shaft (4) and the lower limiting pin shaft (8) are provided with a pin shaft sliding plate (48) between the inner wall of the annular groove (32). The upper limiting pin shaft (4) and the lower limiting pin shaft (8) are respectively arranged on the inner surface of the central part of the upper support plate (1) and the lower support plate (5), and the upper limiting pin shaft (4) and the lower limiting pin shaft (8) are vertically reserved a certain distance in the space formed by the hole (31) and the annular groove (32). The shear pin (9) is arranged between the outer edge of the upper support plate (1) and the outer edge of the lower support plate (5), and the inner surface of the shear pin (9) abuts against the outer edge of the lower support plate (5).

2. A friction pendulum seismic isolation bearing resistant to overturning and falling beam according to claim 1, characterized in that: The cross section of the upper limiting pin shaft (4) and the lower limiting pin shaft (8) is T-shaped, comprising a connecting part (400) and a disc end face (700).

3. A seismic friction pendulum system according to claim 2, wherein: The connecting part (400) passes through the central position of the upper support plate (1) and the lower support plate (5), and is fixed to the outer surface of the upper support plate (1) and the lower support plate (5) by the tension bolt (7).

4. A friction pendulum seismic isolation bearing according to claim 3, wherein: The disc end face (700) of the upper limiting pin shaft (4) and the lower limiting pin shaft (8) extends into and is located in the annular groove (32), and the upper and lower disc end faces (700) are arranged oppositely, the back surface of each disc end face (700) is arc-shaped, and the curvature of the back surface is consistent with the curvature of the upper and lower walls of the annular groove (32) of the damping pendulum (3); the outer edge of the disc end face (700) is reserved a certain distance from the annular groove (32).

5. A seismic friction pendulum system according to claim 4, wherein: The pin shaft sliding plate (48) is located between the back surface of the disc end face (700) and the upper and lower walls of the annular groove (32); the pin shaft sliding plate (48) is a circular ring and is embedded in the annular groove on the back surface of the disc end face (700).

6. A friction pendulum seismic isolation bearing resistant to overturning and falling beam according to claim 1, characterized in that: The upper support plate (1), the lower support plate (5) and the damping pendulum (3) are respectively provided with an upper spherical friction pair and a lower spherical friction pair.

7. A seismic friction pendulum system according to claim 6, wherein: The upper spherical friction pair is composed of an upper support arc-shaped metal friction plate (101) on the inner bottom surface of the upper support plate (1) and an arc-shaped upper spherical sliding plate (2) arranged on the upper surface of the damping pendulum (3); the lower spherical friction pair is composed of a lower support arc-shaped metal friction plate (111) on the inner top surface of the lower support plate (5) and an arc-shaped lower spherical sliding plate (6) arranged on the upper surface of the damping pendulum (3).

8. A seismic friction pendulum system according to claim 7, wherein: The upper spherical sliding plate (2) and the lower spherical sliding plate (6) are arranged in the arc-shaped grooves on the upper and lower surfaces of the damping pendulum (3).

9. The anti-overturning, anti-collapse, friction pendulum seismic base of claim 1, wherein: The inner surface of the shear pin (9) is provided with a friction steel plate (200) at the abutting position with the outer edge of the lower support plate (5).

10. The anti-overturning, anti-collapse, friction pendulum seismic base of claim 1, wherein: The shear pin (9) is fixed to the lower surface of the upper support plate (1) by a bolt.

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