JPS6011132Y2 - bearing device - Google Patents

Description

[Detailed description of the invention] This invention is installed between surfaces facing each other in the direction perpendicular to the bridge axis between a superstructure such as a bridge girder and a support structure that supports the superstructure. It relates to a support device that supports the horizontal force acting on the superstructure in the direction perpendicular to the bridge axis and allows rotation (deflection) of the superstructure in the horizontal plane, and is particularly applicable to cable-stayed bridges, box girder bridges, and suspension bridges. This is a suitable support device for use in bridges that receive large horizontal loads.

In the cable-stayed bridges and box girder bridges mentioned above, the superstructure (bridge girder)
Bridge girders and supporting structures (pilers,
The displacement is allowed by a support device such as a roller support installed between the bridge girder and the support girder, and in the case of a suspension bridge, the above-mentioned displacement is allowed by a link mechanism installed between the bridge girder and the pylons installed on the piers. It allows this and also prevents the bridge girder from floating up.

On the other hand, these bridges are forced to receive relatively large horizontal loads in the direction perpendicular to the bridge axis due to wind loads, earthquake loads, etc. due to their structure, and this horizontal load causes movement of the bridge girder in the direction perpendicular to the bridge axis. Alternatively, for rotation in a horizontal plane, a separate support device is installed between the surfaces of the bridge girder and the support structure that face each other in the direction perpendicular to the bridge axis to allow for their displacement.

The present invention relates to the improvement of the latter type of support device mentioned above, and specifically addresses the problems during construction, namely, that the support device is normally installed between the opposing horizontal surfaces of the upper structure and the support structure. In contrast, pre-assembled bearings are installed between the vertical planes of the superstructure and supporting structure that face each other in the direction perpendicular to the bridge axis, and are installed with a gap that allows the superstructure to expand and contract due to temperature changes, etc. This solves the problem that when constructing the device, the positions of the supporting members change relative to each other, making it difficult to install the members while maintaining their correct positions and ensuring clearances when assembling each other. It is.

A support that is arranged between surfaces of a superstructure and a support structure that supports the superstructure that face each other in a direction perpendicular to the bridge axis, with a gap that allows the superstructure to expand and contract in the direction perpendicular to the bridge axis. The device includes a lower shoe having a circular recess, a rubber elastic body disposed within the circular recess, and an intermediate member disposed on the rubber elastic body, having a sliding plate fixed to the upper surface, and an annular collar formed on the periphery of the lower surface. The sound is generated in advance by an elastic body disposed on the annular collar of the intermediate tone and a pressing ring that covers the periphery of the opening of the circular recess and presses the elastic body and is fixed to the lower shoe. A lower shoe is fixed to one surface facing each other after being assembled while maintaining a normal position, and an upper shoe is fixed to the other surface with a gap between the sliding material and the intermediate sound. Bearing device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the example, as shown in Fig. 1, an example is used for a cable-stayed bridge in which a bridge girder G is supported by a wire rope W between two tower pillars 1 installed on a substructure B such as a bridge pier. explain.

In the cable-stayed bridge shown in Figure 1, the expansion and contraction of the bridge girder G in the bridge axis direction and the rotation (deflection) in the vertical plane are
This is allowed by the roller bearing R disposed between the support girder S and the bridge girder G connected therebetween.

In the figure, a lower shoe 2 is fixed to the side surface of the column 1 via a base plate 3, and a circular recess 4 is formed in the upper surface of the lower shoe 2.

Reference numeral 5 denotes a rubber elastic body housed in the circular recess 4 of the lower shoe 2, and the rubber elastic body 5 has an annular step 6 formed at the periphery of one end thereof. A metal compression ring 7 is attached to the holder.

8 is an intermediate sound arranged on the rubber elastic body 5, and the intermediate sound 8 is arranged to protrude from the opening of the circular recess 4 of the lower shoe,
An annular collar portion 9 is formed at the periphery of the lower surface.

The peripheral edge of the annular collar 1 is formed into a curved surface 10 so that the intermediate tone 8 can be easily tilted within the circular recess 4.

11 is a circular recess formed on the upper surface of the intermediate tone 8.

Reference numeral 12 denotes a sliding plate made of a synthetic resin such as polytetrafluoroethylene resin and placed inside the circular recess 11, and the sliding plate 12 is arranged to slightly protrude from the opening of the circular recess 11.

Reference numeral 13 denotes an annular rubber elastic body disposed on the annular collar portion 9 of the intermediate sound 8.

Reference numeral 14 denotes a pressing ring that covers the opening periphery of the circular recess 4 of the lower shoe 2 and is fixed to the end of the lower shoe. An annular rubber elastic body 13 disposed in the portion 9 is pressed.

Numeral 15 is a bolt that fixes the pressing ring 14 to the end of the lower shoe.

Here, the press ring 14 and the annular rubber elastic body 13 pressed by the press ring 14 press the intermediate sound 8 toward the lower shoe 2 during and after the bearing construction, and the mutual position of the members during assembly is changed. It plays the role of preventing

At this time, the annular rubber elastic body 13 pressed by the pressing ring 14 still has elastic deformability, and the intermediate sound 8 after the bearing is applied.
This allows for tilting within the lower shoe recess 4 without any problem.

Reference numeral 16 denotes an annular groove formed on the upper surface of the press ring 14. A seal ring 17 made of rubber or the like is fitted into the annular groove 16 so as to protrude from the surface of the press ring 14. Plate 12 and intermediate tone 8 and pressing ring 14
Prevent foreign matter from entering between the

Reference numeral 18 denotes an upper shoe fixed by bolts 19 to the side surface of the bridge girder G facing the side surface of the tower column 1, and the upper shoe 18 is attached to a shim plate 20 and a sliding contact plate 2 made of a rustless metal plate or the like.
It is composed of 1.

The sliding plate 21 is the sliding plate 1 arranged at the intermediate sound 8.
2 and are placed facing each other with a gap C between them.

This gap C allows expansion and contraction due to installation errors during support construction and temperature changes in the direction perpendicular to the bridge axis of the bridge girder G, and also allows for sliding contact with the sliding plate 12 when a force in the direction perpendicular to the bridge axis is applied to the bridge girder G. The sliding contact of the plates 21 allows the bridge girder G to expand and contract in the bridge axis direction and to be displaced by rotation (deflection) in the vertical plane.

The present invention has the above-mentioned configuration, and a ring-shaped rubber elastic body is attached to the brim of the intermediate sound, and the intermediate sound is supported by pressing it toward the lower shoe side with a pressing ring through the annular rubber elastic body. It is possible to prevent the rubber elastic body and intermediate sound from separating from the circular recess of the lower shoe, and it is possible to ensure the correct position during assembly without causing any change in the mutual position of each support member during support construction. This makes construction easier.

Further, a gap can be secured between the sliding plate disposed at the intermediate pitch and the sliding contact plate of the upper shoe.

Furthermore, when a force in the direction perpendicular to the bridge axis due to wind or earthquakes acts on the bridge girder, the force can be reliably supported by the surface contact between the sliding plates and the sliding plates. Displacement in the bridge axis direction can also be tolerated by the sliding contact between the sliding plate and the sliding contact plate.

The rotation (deflection) of the bridge girder in the horizontal plane can be released by the deformation of the rubber elastic body disposed in the circular recess of the lower shoe and by the inclination of the intermediate sound.

In addition, in the example, a mode was shown in which a support device is installed between a support structure such as a support girder connected between the tower pillars of a cable-stayed bridge and a vertical plane of the bridge girder that faces each other in the direction perpendicular to the bridge axis. A mode in which a bridge girder supported by a single tower pillar is installed between faces facing each other in the direction perpendicular to the bridge axis, and between a tower pillar and a bridge girder in a suspension bridge, and between a bridge girder and a bridge pier in a box girder bridge. It is also possible to adopt a mode of installation.

In addition, in the example, a support member consisting of a lower shoe, an intermediate sound, etc. is installed on the tower pillar side, and an upper shoe is installed on the bridge girder side, but conversely, the upper shoe is installed on the tower pillar side, and the upper shoe is installed on the bridge girder side. It is also possible to adopt a mode in which a support member consisting of a lower shoe, an intermediate sound, etc. is installed.

Further, in this embodiment, an annular rubber elastic body was used to press the intermediate sound toward the lower shoe side using a pressing ring, but instead of the annular rubber elastic body, a rubber elastic body and a metal plate, etc. were used. A similar effect can be achieved by using a laminate or a spring elastic body such as a coil spring or a leaf spring.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a cable-stayed bridge in the direction perpendicular to the bridge axis, Figure 2 is a longitudinal side view of the support device of the present invention, Figure 3 is a detailed view of section A in Figure 2, and Figure 4 is a cross-sectional view of the support device of the present invention. FIG. 3 is an exploded perspective view of the support device. 1: Tower pillar, 2: Lower shoe, 5: Comb elastic body, 8: Intermediate sound, 9
Nipper part, 12: Slip plate, 13: Elastic body, 14: Press ring, 18: Upper shoe, G: Bridge girder, S: Support girder, C: Gap.

Claims (1)

[Scope of utility model registration request] In a support device that is arranged with a gap that allows expansion and contraction of the superstructure in the direction perpendicular to the bridge axis between surfaces of the superstructure and a support structure that supports the superstructure that face each other in the direction perpendicular to the bridge axis. , a lower shoe having a circular recess, a rubber elastic body disposed within the circular recess, and an intermediate platform disposed on the rubber elastic body, having a sliding plate fixed to the upper surface and an annular collar formed on the periphery of the lower surface; is fixed to the lower shoe by an elastic body disposed on the annular collar of the intermediate base and a pressing ring that covers the opening periphery of the circular recess and presses the elastic body and is fixed to the lower shoe. A supporting device characterized in that the lower shoe is fixed to one opposing surface with a lower shoe fixed to the other surface, and the upper shoe is fixed to the other surface with a gap between the sliding member and the intermediate platform. .