CN200992679Y - Rubber vibration-isolating seat - Google Patents

Abstract

A rubber vibration isolation support, characterized in that the support includes an upper anchorage plate, a lower anchorage plate and a vibration isolation pad, the main material of the vibration isolation pad is rubber, and at least two layers of reinforcement plates are arranged in the rubber , there is a rubber layer between two adjacent reinforcement plates, and the vibration isolation pad is located between the upper anchor plate and the lower anchor plate. The vertical stiffness of the rubber vibration isolation bearing is used to absorb the vibration of the upper beam structure of the bridge, so that the vibration frequency of the whole structure is controlled at about 8-16 Hz, so that there is a sufficient gap between the vibration frequency of the structure and the vibration frequency of the vehicle. The utility model has a simple structure and can reduce the influence of the bridge vibration on the surrounding environment.

Description

Rubber vibration isolation bearing

technical field

The utility model relates to bridge engineering components, in particular to a rubber vibration-isolation bearing used for vibration isolation between bridge girder bodies and bridge piers.

Background technique

At present, there is basically no vibration isolation device between the bridge girder and the bridge pier in China, and bridges often vibrate during use, which affects the surrounding environment and the service life of the bridge.

Contents of the invention

The purpose of this utility model is to solve the above-mentioned deficiencies in the background technology, and to propose a rubber vibration isolation bearing, which can absorb the vibration of the bridge beam structure, so that the vibration frequency of the bridge and the vibration frequency of the vehicle passing the bridge can produce sufficient gap.

In order to achieve the above object, the utility model adopts the following technical scheme: a rubber vibration isolation support, which is characterized in that the support includes an upper anchorage plate, a lower anchorage plate and a vibration isolation pad, and the main material of the vibration isolation pad is The rubber is provided with at least two layers of reinforcement plates inside the rubber, and the rubber layer is between two adjacent layers of reinforcement plates. The vibration isolation pad is located between the upper anchorage plate and the lower anchorage plate.

Preferably, 3-15 layers of reinforcing plates are arranged in the rubber of the above-mentioned vibration-isolating pad.

The above-mentioned vibration isolation pad is preferably a cylinder, and the reinforcing plate is preferably a circular steel plate.

In the above solution, the lower end surface of the vibration isolation pad and the lower anchorage plate, and the upper end surface of the vibration isolation pad and the upper anchorage plate can be connected by bolts.

In the above scheme, the lower end surface of the vibration isolation pad and the lower anchorage plate are connected by bolts, the upper end surface of the vibration isolation pad and the upper anchorage plate are in contact with each other and are not connected, and the upper end surface of the vibration isolation pad is connected to the lower anchorage plate. The corresponding contact surfaces between the upper anchorage plates are respectively provided with wear-resistant layers.

The above-mentioned wear-resistant layers are XLIDE plate and stainless steel plate respectively. The XLIDE plate and the stainless steel plate are respectively inlaid or covered on the upper end surface of the vibration isolation pad and the lower end surface of the upper anchorage plate.

In the above solution, the upper anchorage plate may be connected with the upper anchorage steel rod embedded in the bridge concrete, and the lower anchorage plate may be connected with the lower anchorage steel rod embedded in the bridge pier concrete.

In order to make the above-mentioned rubber vibration-isolation bearing able to bear the horizontal force, the utility model designs a shear force tenon matched with the above-mentioned rubber vibration-isolation bearing. The tenon includes an upper anchor plate, a lower anchor plate, a bottom A basin and a piston, the piston is located in the inner cavity of the bottom basin, the piston seat is connected with the upper anchorage plate, and the bottom basin is connected with the lower anchorage plate.

The above-mentioned piston can be composed of upper and lower layers, the upper layer is a sliding plate, and the lower layer is a piston body, the corresponding contact surface between the sliding plate and the piston body is perpendicular to the axis of the piston, and the corresponding contact surface between the sliding plate and the piston body A wear-resistant layer is provided respectively.

A gap of 10-30 mm may be provided between the lower end surface of the piston and the bottom surface of the inner cavity of the bottom basin.

The upper anchor plate in the above rubber vibration isolation bearing can be connected with the upper anchor steel rod embedded in the bridge concrete, and the lower anchor plate can be connected with the lower anchor steel rod embedded in the bridge pier concrete.

The utility model is designed from the mass-spring system. The vertical stiffness of the rubber vibration isolation bearing is used to absorb the vibration of the upper beam structure of the bridge, so that the vibration frequency of the whole structure is controlled at about 8-16 Hz, so that there is a sufficient gap between the vibration frequency of the structure and the vibration frequency of the vehicle. The main material of the vibration isolation pad is natural rubber and neoprene by secondary vulcanization, and 3 to 15 layers of reinforced steel plates are added in the middle to adjust the stiffness and vibration reduction frequency of the support. The design is based on EN1337-3. It mainly provides The vertical bearing and corner function allow the horizontal displacement caused by thermal deformation, creep or shrinkage deformation of the beam body. The XLIDE plate and the stainless steel plate form a friction pair to achieve horizontal displacement and minimize the shear deformation of the rubber. All lateral forces of the structure are borne by shear tenons used in conjunction with rubber vibration isolation bearings. The shear tenon bears the horizontal force, not the vertical force, and provides the corner and horizontal displacement of the beam body.

The utility model has a simple structure and can reduce the influence of the bridge vibration on the surrounding environment.

Main features:

The maximum vertical load of the rubber vibration isolation bearing can reach 3000t

·During use, the rubber vibration-isolation bearing is slightly loaded laterally, and the shear force tenon only bears horizontal force

Allow horizontal displacement of the beam body due to creep, shrinkage deformation and thermal deformation

·Corner allowed

· Reduce the base frequency to a safe range

The damping characteristics reduce the vibration of the structure

Description of drawings

Fig. 1 is a schematic structural view of the rubber vibration isolation bearing of Embodiment 1.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a schematic structural view of the rubber vibration-isolation bearing of Embodiment 2.

FIG. 4 is a top view of FIG. 3 .

Fig. 5 is a partial enlarged view of position I in Fig. 3 .

Fig. 6 is a schematic diagram of the structure of the shear tenon in Embodiment 1.

Fig. 7 is a schematic diagram of the structure of the shear tenon in Embodiment 2.

Detailed ways

Embodiment 1: The rubber vibration isolation bearing described in this embodiment includes an upper anchorage plate 1, a lower anchorage plate 2 and a vibration isolation pad 3 (see Figures 1 and 2). The main material of the vibration isolation pad is rubber, and 3-15 layers of reinforcement plates 31 are arranged in the rubber, and there is a rubber layer 32 between two adjacent layers of reinforcement plates 31. The vibration isolation pad 3 is located on the upper anchorage plate 1 Between the lower anchor plate 2. The lower end surface of the vibration isolation pad 3 and the lower anchorage plate 2, and the upper end surface of the vibration isolation pad 3 and the upper anchorage plate 1 are respectively connected with bolts. The upper anchorage plate 1 is connected with the upper anchorage steel rod 4 buried in the bridge concrete, and the lower anchorage plate 2 is connected with the lower anchorage steel rod 5 buried in the bridge pier concrete, and the connection method is welding or bolted connection.

The shape of the above-mentioned vibration isolation pad 3 is a cylinder, and may also be a prism. The reinforcing plate 31 is a circular steel plate, and may also be a prismatic steel plate.

The rubber vibration isolation bearing mainly bears vertical force, provides vertical bearing and corner function, and does not bear horizontal force.

In order to make the above-mentioned rubber vibration-isolation bearing able to bear the horizontal force, the utility model designs a shear force tenon (see Fig. 6) used in conjunction with the above-mentioned rubber vibration-isolation bearing, the tenon includes an upper anchorage plate 1, Lower the anchor plate 2, the bottom basin 6 and the piston 7, the piston 7 is located in the inner cavity of the bottom basin 6, and there is a gap of 10-30 mm between the lower end surface of the piston 7 and the bottom surface of the inner cavity of the bottom basin. The piston 7 is provided with a protruding outer edge portion 71 from the upper end, and a sealing rubber ring 8 is arranged between the outer edge portion 71 and the upper end surface of the bottom basin 6 to prevent dust from entering the inner cavity of the bottom basin. The piston 7 is connected with the upper anchorage plate 1 with bolts, and the bottom basin 6 is connected with the lower anchorage plate 2 with bolts. The upper anchorage plate 1 is connected with the upper anchorage steel rod 4 buried in the bridge concrete, and the lower anchorage plate 2 is connected with the lower anchorage steel rod 5 buried in the bridge pier concrete, and the connection method is welding or bolted connection.

The shear tenon is used in conjunction with the rubber vibration-isolation bearing to bear the horizontal force, not to bear the vertical force, and provide the corner and horizontal displacement of the beam body. Since there is a gap between the piston and the bottom surface of the inner cavity of the bottom basin, this effectively prevents the tenon from bearing the vertical force.

Embodiment 2: The structure of the rubber vibration isolation bearing described in this embodiment is basically the same as that of Embodiment 1 (see Figures 3 to 5), except that the lower end surface of the vibration isolation pad 3 and the lower anchor plate 2 The upper end surface of the vibration isolation pad 3 and the upper anchorage plate 1 are in contact with each other and are not connected. The upper end surface of the vibration isolation pad 3 and the upper anchorage plate 1 are respectively provided on the corresponding contact surfaces wear layer. The wear-resistant layers are XLIDE plate 9 and stainless steel plate 10 respectively. The XLIDE plate 9 and the stainless steel plate 10 are respectively inlaid or coated on the upper end surface of the vibration isolation pad 3 and the lower end surface of the upper anchorage plate 1 . The friction pair formed between the XLIDE plate and the stainless steel plate realizes the horizontal displacement and minimizes the shear deformation of the rubber.

The structure of the shear tenon used in conjunction with it is basically the same as that of Embodiment 1 (see Figure 7). The difference is that the piston 7 is composed of upper and lower layers. The upper layer is a sliding plate 72, and the lower layer is a piston body 73. The contact surface corresponding to each other between the sliding plate 72 and the piston body 73 is perpendicular to the axis of the piston. Between the sliding plate and the piston body The contact surfaces corresponding to each other are respectively provided with wear-resistant layers. This shear tenon bears all lateral forces.

Claims (10)

1. A rubber vibration isolation support, characterized in that the support includes an upper anchorage plate, a lower anchorage plate and a vibration isolation pad, the main material of the vibration isolation pad is rubber, and there are at least two layers of rubber in the rubber The reinforcement plate is a rubber layer between two adjacent layers of reinforcement plates, and the vibration isolation pad is located between the upper anchorage plate and the lower anchorage plate. 2. The rubber vibration isolation bearing according to claim 1, characterized in that there are 3-15 layers of reinforcing plates inside the rubber. 3. The rubber vibration isolation bearing according to claim 1, wherein the vibration isolation pad is a cylinder, and the reinforcement plate is a circular steel plate. 4. The rubber vibration isolation bearing according to any one of claims 1 to 3, characterized in that between the lower end surface of the vibration isolation pad and the lower anchor plate, between the upper end surface of the vibration isolation pad and the upper anchor plate, The anchor plates are connected with bolts. 5. The rubber vibration isolation support according to any one of claims 1 to 3, characterized in that the lower end surface of the vibration isolation pad and the lower anchor plate are connected by bolts, and the upper end surface of the vibration isolation pad is The upper anchorage plate is in contact with or not connected to each other, and wear-resistant layers are respectively arranged on the contact surfaces corresponding to each other between the upper end surface of the vibration isolation pad and the upper anchorage plate. 6. The rubber vibration isolation bearing according to claim 5, characterized in that the wear-resistant layers are XLIDE plates and stainless steel plates respectively, and the XLIDE plates and stainless steel plates are respectively inlaid or coated on the upper end surface and the upper surface of the vibration isolation pad. The lower end of the anchorage plate. 7. The rubber vibration isolation bearing according to any one of claims 1 to 3, characterized in that the upper anchorage plate is connected with the upper anchorage steel rod buried in the bridge concrete, and the lower anchorage plate is connected with the The lower anchorage steel rod connection buried in the concrete of the pier. 8. A shear force tenon used in conjunction with the rubber vibration isolation bearing of claim 1, characterized in that the tenon comprises an upper anchorage plate, a lower anchorage plate, a bottom basin and a piston, and the piston is located in the bottom basin In the inner cavity, the piston seat is connected with the upper anchorage plate, and the bottom basin is connected with the lower anchorage plate. 9. The shear tenon according to claim 8, characterized in that the piston is composed of upper and lower layers, the upper layer is a sliding plate, and the lower layer is a piston body, and the corresponding contact surface between the sliding plate and the piston body and the piston The axis is vertical, and wear-resistant layers are respectively arranged on the contact surfaces corresponding to each other between the sliding plate and the piston body. 10. The shearing tenon according to claim 8 or 9, characterized in that there is a gap of 10-30mm between the lower end surface of the piston and the bottom surface of the inner cavity of the basin.

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