Friction pendulum support for preventing steel wire rope from falling off beam

Abstract

The utility model relates to a steel wire rope 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 between the upper support plate and the lower support plate, a shear pin, an upper limiting pin shaft, a lower limiting pin shaft and a steel wire rope, a through hole is formed in the middle of the damping ball pendulum; the upper limiting pin shaft and the lower limiting pin shaft are positioned in the hole and are connected together through a plurality of groups of steel wire ropes; 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, and the inner surface of the shear pin abuts against the outer edge of the lower support plate. The support not only can realize the temperature change displacement function of a bridge under the action of conventional temperature change force, but also can generate different seismic isolation and reduction displacements through the shear pin and the upper and lower limiting devices according to different sudden change forces (seismic forces) when sudden change forces (seismic forces) such as earthquakes are generated, and meanwhile, the support has the functions of preventing beam falling and resisting tension; therefore, multi-aspect protection on the bridge system is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a friction pendulum support, especially a steel wire rope 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. Conventional friction pendulum shock mitigation and isolation supports achieve the shock mitigation and isolation function of earthquakes 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, CN204252309U discloses an automatic homing particle damper, which comprises a damper cavity, a particle group, a buffer material, and a multi-stage friction pendulum support. 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 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 matches and contacts the convex spherical surface provided in 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. The above-mentioned patents cannot prevent the beam from falling under the action of a large earthquake, and also cannot limit the position and resist the vertical pull. Therefore, there is an urgent need to propose a new friction pendulum shock mitigation and isolation support to solve the above-mentioned problems. CONTENT OF THE UTILITY MODEL

[0003] In view of the above-mentioned defects of the prior art, the utility model provides a steel wire rope 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 preventing the beam from falling and resisting tension, 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] A steel wire rope anti-falling beam friction pendulum support, comprising an upper support plate, a lower support plate, and a shock absorption ball pendulum between the two, the friction pendulum support further comprising a shear pin, an upper limiting pin shaft, a lower limiting pin shaft, and a steel wire rope.

[0006] The middle part of the shock absorption ball pendulum is provided with a through hole;

[0007] The upper limit pin shaft and the lower limit pin shaft are located in the hole and are respectively arranged at the central inner surface of the upper support plate and the lower support plate, and the upper limit pin shaft and the lower limit pin shaft are vertically reserved a certain distance;

[0008] The upper limit pin shaft and the lower limit pin shaft are connected together through a plurality of groups of steel wires.

[0009] 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.

[0010] Further, the upper support plate, the lower support plate and the damping ball pendulum are respectively provided with an upper spherical friction pair and a lower spherical friction pair.

[0011] Further, the upper spherical friction pair is composed of an upper support arc-shaped metal friction plate of the inner bottom surface of the upper support plate and an arc-shaped upper spherical sliding plate arranged on the upper surface of the damping ball pendulum; and the lower spherical friction pair is composed of a lower support arc-shaped metal friction plate of the inner top surface of the lower support plate and an arc-shaped lower spherical sliding plate arranged on the upper surface of the damping ball pendulum.

[0012] Further, the upper spherical sliding plate and the lower spherical sliding plate are arranged in the arc-shaped grooves on the upper and lower surfaces of the damping ball pendulum.

[0013] Further, the inner surface of the shear pin abutting against the outer edge of the lower support plate is provided with a friction steel plate.

[0014] Further, the shear pin is fixed on the lower surface of the upper support plate through a bolt.

[0015] Further, the steel wires are 4 groups arranged symmetrically along the center of the upper limit pin shaft and the lower limit pin shaft, one end of each group of steel wires is fixed on the upper limit pin shaft, and the other end is fixed on the lower limit pin shaft.

[0016] Further, the steel wires are 2 groups arranged in a cross shape along the center of the upper limit pin shaft and the lower limit pin shaft, each group of steel wires is closed and penetrates the upper limit pin shaft and the lower limit pin shaft; the upper limit pin shaft and the lower limit pin shaft are provided with cross-shaped perforations for penetrating the steel wires.

[0017] Further, the upper limit pin shaft and the lower limit pin shaft are isosceles trapezoidal in cross section, the width of the root connecting portion of the upper support plate and the lower support plate is smaller than the width of the opposite end portion, so as to facilitate the arrangement of the steel wires and the collision limiting of the damping ball pendulum.

[0018] Further, the lower surface of the upper support plate and the upper surface of the edge of the lower support plate on the inner side of the shear pin are further provided with a limiting rod.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model discloses a steel wire rope anti-falling beam friction pendulum support, which is a friction pendulum seismic isolation support capable of protecting a bridge system in multiple levels and having a tensile function. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a steel wire rope anti-falling beam friction pendulum support schematic view of the utility model;

[0022] Figure 2 It is another steel wire rope anti-falling beam friction pendulum support schematic view of the utility model. DETAILED DESCRIPTION

[0023] The utility model will be further explained in detail in combination with the drawings and specific implementation, so that the utility model can be clearly understood, but they do not constitute limitation to the utility model. Figures 1-2

[0024] 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 must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation to the utility model.

[0025] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" and "connection" should be understood in a broad sense, for example, it can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, 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.

[0026] Example 1

[0027] As shown in the drawings, Figure 1 ​As shown, the steel wire rope anti-beam friction pendulum support of the embodiment includes an upper support plate 1, a lower support plate 5, and a damping ball pendulum 3 between the two, and further includes a shear pin 9, an upper limiting pin shaft 4, a lower limiting pin shaft 8, and a steel wire rope 7. The damping ball pendulum 3 is provided with a through hole in the middle. The upper limiting pin shaft 4 and the lower limiting pin shaft 8 are located in the hole and are respectively arranged on the central inner surfaces 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. The upper limiting pin shaft 4 and the lower limiting pin shaft 8 are connected together by a plurality of groups of steel wire ropes 7. In the embodiment, the steel wire ropes 7 are 4 groups arranged symmetrically along the centers of the upper limiting pin shaft 4 and the lower limiting pin shaft 8, one end of each group of steel wire ropes 7 is fixed on the upper limiting pin shaft 4, and the other end is fixed on the lower limiting pin shaft 8.

[0028] Specifically, in the embodiment, the upper limiting pin shaft 4 and the lower limiting pin shaft 8 are both isosceles trapezoidal in cross section, the width of the root connecting part of the upper limiting pin shaft 4 and the lower limiting pin shaft 8 with the upper support plate 1 and the lower support plate 5 is less than the width of the opposite end part, which is convenient for the arrangement of the steel wire rope 7 and the collision limiting of the damping ball pendulum 3.

[0029] As shown, Figure 1 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, the inner surface of the shear pin 9 abuts against the outer edge of the lower support plate 5, the shear pin 9 is fixed on the lower surface of the upper support plate 1 by bolts, and the abutting part of the inner surface of the shear pin 9 and the outer edge of the lower support plate 5 is provided with a friction steel plate 200. In addition, the lower surface of the upper support plate 1 and the upper surface of the edge of the lower support plate 5 on the inner side of the shear pin 9 are further provided with a limiting rod 300, which also plays a role of further limiting and energy dissipation.

[0030] In the embodiment, as shown, Figure 1 The upper support plate 1, the lower support plate 5, and the damping ball pendulum 3 are respectively provided with an upper spherical surface friction pair and a lower spherical surface friction pair. The upper spherical surface 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 surface sliding plate 2 arranged on the upper surface of the damping ball pendulum 3. The lower spherical surface 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 surface sliding plate 6 arranged on the upper surface of the damping ball 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 ball pendulum 3.

[0031] Under the conditions of small earthquakes and micro earthquakes, the shear pin 9 arranged between the upper and lower support plates is used for limiting, and the sudden force (earthquake force) is resisted by the elastic deformation of the shear pin 9. After the small earthquake ends, the deformation of the shear pin 9 can be automatically restored, without the need to replace the shear pin 9, thereby reducing the maintenance cost.

[0032] Under the conditions of medium earthquakes, the earthquake energy is dissipated by the yield deformation of the shear pin 9.

[0033] When a major earthquake occurs, the shear pin 9 shears off, isolating the beam from the pier. Most of the seismic energy cannot be transmitted from the pier to the beam, and the bearing enters a seismic isolation state. Because the upper and lower spherical friction pairs of the damping ball bearing 3 are designed with equal spherical surfaces, the stress surfaces always correspond, resulting in uniform stress on the bearing and extending its service life. When the actual earthquake exceeds the design target, the upper limit pin 4 on the upper bearing plate 1 and the lower limit pin 8 on the lower bearing plate contact the inner wall of the hole on the damping ball bearing 3, limiting the maximum displacement of the bearing and preventing the beam from falling off.

[0034] The upper limit pin 4 and the lower limit pin 8 are connected by a steel wire rope 7, and are integrated with the shock-absorbing ball pendulum 3, the upper support plate 1, and the lower support plate 5. Under normal working conditions, the steel wire rope 7 is not under stress and is in a natural state. When the structure reaches the limit position, the steel wire rope 7 is under stress and plays a connecting role, thereby playing a role in resisting tension and overturning.

[0035] Example 2

[0036] In this embodiment, as Figure 2 As shown, the wire ropes 7 are arranged in two sets, intersecting at the center of the upper limit pin 4 and the lower limit pin 8. Each set of wire ropes 7 passes through the upper limit pin 4 and the lower limit pin 8 in a closed manner. The upper limit pin 4 and the lower limit pin 8 are provided with cross-shaped through holes 10 for the wire ropes 7 to pass through. Other structural components and their connections are the same as in Embodiment 1, and will not be described in detail here.

[0037] The above are merely preferred embodiments of this utility model and do not constitute any limitation on the structure of this utility model. The arrangement and quantity of this utility model are not limited to this example and can be optimized according to actual engineering conditions. Any modifications, equivalent changes, and decorations made to the above embodiments based on the technical principles of this utility model, without departing from the scope of the technical solution of this utility model, are still within the scope of the technical solution of this utility model.

Claims

1. A wire rope anti-fall beam friction pendulum support, comprising an upper support plate (1), a lower support plate (5), and a shock-absorbing ball pendulum (3) between the two, characterized in that: The friction pendulum support also includes a shear pin (9), an upper limit pin (4), a lower limit pin (8), and a wire rope (7); The shock-absorbing ball pendulum (3) has a through hole in the middle; the upper limit pin (4) and the lower limit pin (8) are located in the hole and are respectively set opposite to each other on the inner surface of the upper support plate (1) and the lower support plate (5), and the upper limit pin (4) and the lower limit pin (8) are vertically reserved at a certain distance; the upper limit pin (4) and the lower limit pin (8) are connected together by multiple sets of steel wire ropes (7); The shear pin (9) is located between the bottom of 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. The wire rope anti-fall beam friction pendulum support according to claim 1, characterized in that: The upper support plate (1), the lower support plate (5), and the shock-absorbing ball pendulum (3) are respectively provided with an upper spherical friction pair and a lower spherical friction pair.

3. The friction pendulum support for a wire rope anti-fall beam according to claim 2, characterized in that: 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) on the upper surface of the shock-absorbing ball 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) on the upper surface of the shock-absorbing ball pendulum (3).

4. The wire rope anti-fall beam friction pendulum support according to claim 3, characterized in that: The upper spherical slide plate (2) and the lower spherical slide plate (6) are both set in the arc-shaped grooves on the upper and lower surfaces of the shock-absorbing ball pendulum (3).

5. The friction pendulum support for a wire rope anti-fall beam according to claim 1, characterized in that: Friction steel plates (200) are provided at the contact points between the inner surface of the shear pin (9) and the outer edge of the lower support plate (5).

6. The friction pendulum support for a wire rope anti-fall beam according to claim 1, characterized in that: The shear pin (9) is fixed to the lower surface of the upper support plate (1) by bolts.

7. The wire rope anti-fall beam friction pendulum support according to claim 1, characterized in that: The wire ropes (7) are arranged in four groups symmetrically along the upper limit pin (4) and the lower limit pin (8). One end of each group of wire ropes (7) is fixed on the upper limit pin (4), and the other end is fixed on the lower limit pin (8).

8. The wire rope anti-fall beam friction pendulum support according to claim 1, characterized in that: The wire rope (7) consists of two sets arranged in a cross shape along the center of the upper limit pin (4) and the lower limit pin (8). Each set of wire rope (7) passes through the upper limit pin (4) and the lower limit pin (8) in a closed manner. The upper limit pin (4) and the lower limit pin (8) are provided with cross-shaped through holes for passing through the wire rope (7).

9. The friction pendulum support for a wire rope anti-fall beam according to claim 1, characterized in that: The upper limit pin (4) and the lower limit pin (8) have isosceles trapezoidal cross sections. The width of the connection between the upper support plate (1) and the lower support plate (5) is smaller than the width of the opposite end, which facilitates the setting of the wire rope (7) and the collision limit with the shock-absorbing ball pendulum (3).

10. A wire rope anti-fall beam friction pendulum support according to claim 1, characterized in that: Limiting rods (300) are also provided on the lower surface of the upper support plate (1) inside the shear pin (9) and the upper surface of the edge of the lower support plate (5).

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