JP2665730B2 - Omnidirectional fixed bearing device using rubber bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an omnidirectionally fixed bearing device using a rubber bearing at a fixed bearing end of a bridge girder or the like built on a pier or an abutment.

[0002]

2. Description of the Related Art Conventionally, as an elastic bearing device for a bridge fixed bearing end, one disclosed in Japanese Utility Model Laid-Open No. 3-99014 is known.

[0003]

In the case of the above-mentioned conventional elastic support device for a fixed bridge support end, no gap is provided between the support shaft and the elastic support. A large seismic force acts on the rubber material that is the bearing,
The fixed bearing may be broken. In addition, there are Japanese Utility Model Publication No. 6-38887 and Japanese Patent Publication No. 4-13489. However, even with these elastic bearing devices, there is a possibility that the elastic bearing body may be destroyed by a roll due to a large earthquake due to its structure.

[0004] It is an object of the present invention to solve the above-mentioned problems and to provide an omnidirectionally fixed bearing device using a rubber bearing.

[0005]

In order to achieve the above-mentioned object, an omnidirectional fixed bearing device using a rubber bearing according to the present invention comprises a support member 19 as a lower structure and an upper structure. In the bearing device in which the elastic bearing members 6 are arranged between the bridges 17, the upper portion of the central bearing protrusion 2 protruding from the center of the support base 1 fixed to the upper surface of the support member 19 is formed in the longitudinal direction of the bridge 17. It is inserted through a gap into the central hole 13 of the bridge support member 7 fixed to the lower surface that is inclined at an angle, and is further fixed to the annular upper metal plate 3 and the lower portion of the upper metal plate 3 in a stacked state. Annular rubber plate 4
And the elastic bearing body 6 composed of an annular metal plate 5 buried in a laminated state in the rubber plate 4 is placed on the support base 1 and is disposed away from the central bearing projection 2. The upper metal plate 3 and the bridge support member 7 are fixed.

[0006]

According to the present invention, a bridge 1 inclined in the longitudinal direction of a girder.
The strong vertical seismic force applied to the bridge 7 is smoothly absorbed through the bridge support member 7 supported by the elastic support 6, so that no excessive force is applied to each part of the support device, and the bridge support member 7 is not affected. The large lateral displacement of the elastic bearing 6 and
The center support projection 2 provided on the support base 1 is securely prevented by being loosely fitted in the center hole 13 of the bridge support member 7, so that the elastic support body 6 is not damaged, and a minute lateral swing center hole is provided. It is absorbed in the gap between 13 and the central bearing projection 2.

[0007]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 4 show an embodiment of an omnidirectionally fixed bearing device using a rubber bearing. A square cross section made of a steel material is provided at the center of the upper surface of a square steel support base 1 made of a steel material. A circular bottom support projection 2 is formed integrally with the support base 1, and a flat bottom surface is provided on the upper surface of the support base 1 so as to surround the center support projection 2 at a position separated from the center support projection 2 by an equal distance L. And an annular elastic bearing body 6 having an inner side surface and an outer side surface. The above-described equidistant distance L is provided between the inner peripheral surface of the annular elastic bearing member 6 and the outer peripheral surface of the center bearing projection 2, and the distance between the inner surface and the outer surface of the annular elastic bearing member 6 is adjusted. equidistant is set to L ₁ between.

The elastic bearing member 6 comprises a cylindrical rubber plate 4 laminated and fixed on the upper surface of the support table 1 and an upper metal plate 3 fixed on the upper surface of the rubber plate 4. A plurality of stainless steel annular metal plates 5 are embedded and arranged between the layers, and the annular metal plate 5 and the rubber plate 4 are integrally fixed, and the rubber plate 4 is attached to the support base 1 and the upper metal plate 3. It is arranged so that it may contact.

The female screw holes 21 are formed at four places of the upper metal plate 3.
A bridge support member 7 having a bolt insertion hole 12 for inserting the coupling bolt 20 downward, a slope 10 on the upper surface, and a central hole 13 is provided at a position corresponding to the female screw hole 21. Is provided on the upper surface of the upper metal plate 3.

Next, the construction method will be described. A omnidirectionally fixed bearing device using the rubber bearing configured as described above,
It is transported to near the construction site.

At the construction site, an omnidirectionally fixed bearing device using the rubber bearing is mounted on the center of the upper surface of a support member 19 which is a substructure such as a concrete pier or abutment. Anchor bolts 15 are inserted into anchor bolt insertion holes 11 provided at four corners of the base 1, and the steel support base 1 is fixed to the support member 19 by nuts 16 screwed into the anchor bolts 15.

Next, the inclined surface 10 of the bridge support member 7 is fixed in advance by welding 14 to the lower surface of the lower flange 18 of the fixed end side portion of the bridge 17 made of H-section steel inclined in the longitudinal direction of the girder. The bridge 17 is placed on the upper surface of the upper metal plate 3, and the center support projection 2 is fitted into the center hole 13 of the bridge support member 7.

Subsequently, the lower flange 18 of the bridge 17
And bolt insertion holes 12 provided in the bridge support member 7,
22 is screwed into the female screw hole 21 of the upper metal plate 3 so that the lower bolt 18, the bridge support member 7, and the upper metal plate of the elastic support 6 can be screwed with the connection bolt 20. 3 are integrally joined.

According to the above-described embodiment, the vertical vibration applied to the bridge 17 and the substructure such as the pier or the abutment can be smoothly absorbed by the elastic bearing member 6, while the horizontal vibration can be absorbed by the lower part of the pier or the abutment. Since the central support projection 2 provided on the structure is inserted into the central hole 13 of the bridge support member 7, the transmission is appropriately regulated and transmitted, and the elastic bearing 6 does not suffer from shear failure.

FIGS. 5 and 6 show another embodiment of an omnidirectionally fixed bearing device using a rubber bearing. In this embodiment, a plurality of elastic bearing members 6 are provided on a lower surface thereof at intervals. The upper surface of the lower metal plate 24 having the female screw holes 23 for bolt screwing is integrally fixed, and a plurality of bolt head accommodating recesses 25 and a through hole for inserting a bolt shaft portion are provided at intervals on the lower surface side of the support base 1. 26 are provided concentrically, and the bolt shaft portion insertion through hole 26 is opened on the upper surface side of the support base 1, and is inserted through the bolt shaft portion insertion through hole 26 and the bolt screw female screw hole. The configuration in which the lower metal plate 24 of the cylindrical elastic bearing body 6 is fixed to the support base 1 by a bolt 27 screwed to 23 is different from that of the above-described embodiment, but other configurations are the same as those of the above-described embodiment. Is the same as

[0016]

According to the present invention, the center support projection 2 is fixed to the support base 1, and the center support projection 2 is separated from the center support projection 2.
An annular upper metal plate 3 disposed over the entire circumference of the central support projection 2; an annular rubber plate 4 fixedly attached to a lower portion of the lower portion of the upper metal plate 3; An elastic bearing 6 comprising an annular metal plate 5 embedded in a laminated state is fixed to the support base 1, and a bridge support member 7 having an upper surface inclined on the upper metal plate 3 in the longitudinal direction of the girder.
And the center support projection 2 is fitted in the center hole 13 of the bridge support member 7 fixed to the bridge 17, so that even if a strong seismic force acts on the inclined bridge 17, The seismic force can be buffered and stopped while preventing a strong external force from acting, and the elastic bearing 6 does not break due to shearing. Further, the structure of the bearing is extremely simple.

[Brief description of the drawings]

FIG. 1 is a side view showing an omnidirectionally fixed bearing device using a rubber bearing according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a vertical sectional side view showing an omnidirectionally fixed bearing device using a rubber bearing according to one embodiment of the present invention.

FIG. 5 is a side view showing an omnidirectionally fixed bearing device using a rubber bearing according to another embodiment of the present invention.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

FIG. 7 is a vertical sectional side view showing an omnidirectionally fixed bearing device using a rubber bearing according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Support stand 2 Center support protrusion 3 Upper metal plate 4 Rubber plate 5 Ring metal plate 6 Elastic support 7 Bridge support member 11 Anchor bolt insertion hole 12 Bolt insertion hole 13 Center hole 14 Welding 15 Anchor bolt 16 Nut 17 Bridge 18 Lower part Flange 19 Support member 20 Connecting bolt 21 Female screw hole 22 Bolt insertion hole L Equidistant L ₁ Equidistant

Claims (1)

(57) [Claims] 1. In a bearing device in which an elastic bearing body 6 is arranged between a support member 19 as a lower structure and a bridge 17 as an upper structure, the center of the support base 1 fixed to the upper surface of the support member 19 is provided. The upper part of the central bearing projection 2 projecting from
The bridge 17 is inserted through a gap into a central hole 13 of a bridge support member 7 fixed to a lower surface of the bridge 17 inclined in the longitudinal direction of the girder. An annular rubber plate 4 fixed to the lower portion in a laminated state,
The elastic bearing body 6 composed of the annular metal plate 5 embedded in the rubber plate 4 in a laminated state is placed on the support base 1,
An omnidirectionally fixed bearing device using a rubber bearing, wherein the bearing device is arranged so as to be separated from the central bearing protrusion 2 and the upper metal plate 3 and the bridge support member 7 are fixed. .