JP4404319B1 - Bearing device - Google Patents

Abstract

An object of the present invention is to provide a bearing device with a simple structure and capable of ensuring compactness and high attenuation.
In a bearing device, a first slide member having a first sliding surface formed of a downward convex curved surface disposed on an upper structure and an upward convex curved surface disposed on a lower structure. The second sliding member 13 formed with the second sliding surface 14 is arranged between the first and second sliding members, and the upper and lower surfaces are in surface contact with the first and second sliding surfaces. And a slide transmission member 15 formed with third and fourth sliding surfaces 16 and 17 each having a concave curved surface. The thin center portion of the slide transmission member is subjected to vertical stress during an earthquake. A feature is that the through-holes 20 dispersed in the thick peripheral direction are formed.
[Selection] Figure 8

Description

  The present invention relates to a support device provided between an upper structure and a lower structure of a structure such as a building or a bridge, and having a support function for supporting a vertical load and a horizontal load of the upper structure.

As a seismic isolation bearing device disposed between an upper structure and a lower structure of a structure such as a building, JP-A-11-117571 discloses a convex curved surface fixed to an upper member as shown in FIG. Between the first member and the second member, the first member 11 having the first member 11, the second member 13 having the convex curved surface 14 fixed to the lower member, and the first member and the second member. There is provided a seismic isolation bearing device in which a slide transmission member 15 having concave curved surfaces 16 and 17 in spherical contact with the convex curved surfaces 12 and 14 is disposed, and the first member and the second member can be horizontally displaced via the slide transmission member. It is disclosed.
JP 2004-68462 A

  Such a seismic isolation bearing device can be expected to have a great damping effect due to the frictional resistance caused by sliding through the sliding members of the first member and the second member against the horizontal force during the earthquake.

  However, in the seismic isolation bearing device having such a structure, the first member and the second member have a convex spherical shape with respect to the vertical load at the time of the earthquake. Convergence occurs, concave and convex spherical surfaces are formed on the top and bottom, stress is concentrated on the thinnest part in the center of the slide transmission member, and the slide transmission member is destroyed and the function as a seismic isolation bearing device cannot be performed. . In fact, in the earthquake disaster of Hanshin Awaji, many cases have been reported in which stress is concentrated on the thin part of the bridge support device and the support is destroyed. In order to cope with stress concentration due to vertical load, it may be possible to increase the overall thickness of the slide transmission member, but this not only increases the amount of steel used, but also increases the height of the bearing device. Therefore, there is a problem that it cannot be applied as a bridge support device having a height restriction.

  The present invention solves the above-mentioned conventional problems, and it is possible to secure the compactness and high attenuation of the bearing device with a simple structure, and to avoid the breaking of the bearing device even when a large vertical load is applied during an earthquake. An object is to provide a bearing device.

In order to solve the above problems, the bearing device of the present invention is a bearing device for a structure such as a building or a bridge, and has a first sliding surface formed of a downward convex curved surface arranged in the upper structure. A first slide member, a second slide member formed with a second sliding surface composed of an upward convex curved surface disposed in the lower structure, and the first slide member and the second slide member, A slide transmission member formed on the upper and lower surfaces with third and fourth sliding surfaces made of concave curved surfaces in surface contact with the first and second sliding surfaces, and the slide transmission member is thin. A through hole is formed in the central part to disperse the stress in the vertical direction during an earthquake in the thicker peripheral direction.
more than

  In the bearing device of the present invention, the convex curved surfaces of the first and second sliding surfaces are formed by cutting a part of a cylindrical shape, and the shapes of the third and fourth sliding surfaces are the first. And a concave curved surface in surface contact with the convex curved surface of the second sliding surface, stoppers are disposed at both axial ends of the first and second slide members and the slide transmission member, and the first and second The slide through the slide transmission member of the slide member is one direction of the radial slide.

  In the bearing device of the present invention, the first and second sliding surfaces are convex spherical surfaces, and the third and fourth sliding surfaces formed on the upper and lower surfaces of the slide transmitting member are the first and the second sliding surfaces. A concave spherical surface that is in surface contact with the convex spherical surface of the second sliding surface is provided, and the sliding of the first and second sliding members through the slide transmission member is slidable in all directions.

Further, the bearing device of the present invention fixes a rubber buffer in which a plurality of reinforcing steel plates and rubber are laminated to the outside of the first slide member, the second slide member, and the slide transmission member between the upper and lower structures. It is characterized by arranging.

A first slide member having a first sliding surface formed of a downward convex curved surface disposed in the upper structure, and a second slide member formed of a second sliding surface formed of an upward convex curved surface disposed in the lower structure. Third and fourth sliding surfaces, which are arranged between a sliding member and the first and second sliding members, and are formed of concave curved surfaces that are in surface contact with the first and second sliding surfaces on the upper and lower surfaces. An upper structure having a structure in which a through-hole is formed in the thin central portion of the slide transmission member to distribute the stress in the vertical direction during an earthquake in the thick peripheral direction. The slide transmission member transmits the reaction force accompanying the slide of the first slide member due to the horizontal load from the slide to the second slide member, and the second slide member is forcibly slid in the opposite direction to slide the upper and lower surfaces. High damping function Since the horizontal displacement can be shortened, the device can be made compact and the cost can be reduced, and the through-hole formed in the thin central part of the slide transmission member against the vertical load during an earthquake, The direction of the stress accompanying the vertical load is dispersed in the direction of the thick peripheral portion, and the slide transmission member can be prevented from being broken due to the stress concentration.
The convex surfaces of the first and second sliding surfaces are formed by cutting a part of a cylindrical shape, and the shapes of the third and fourth sliding surfaces are in surface contact with the convex surfaces of the first and second sliding surfaces. A concave curved surface is provided, stoppers are disposed at both axial ends of the first and second slide members and the slide transmission member, and the slide via the slide transmission member of the first and second slide members is set to one direction of the radial slide. With this configuration, it is possible to provide a unidirectional two-plane forced slide bearing having a high damping performance with a simple configuration as a bridge bearing device that can slide only in the bridge axis direction.
The first and second sliding surfaces are convex spherical surfaces, and the third and fourth sliding surfaces formed on the upper and lower surfaces of the slide transmitting member are concave spherical surfaces that are in surface contact with the convex spherical surfaces of the first and second sliding surfaces. With the configuration in which the slide through the slide transmission member of the first and second slide members is slidable in all directions, the omnidirectional two-surface forced slide bearing having high attenuation performance can be obtained with a simple configuration.
Wherein a plurality of reinforcing steel and rubber buffer rubber was laminated first slide member, the construction of arranging and fixed between the outer upper and lower structure of the second slide member and said slide transmission member, a rubber buffer The horizontal displacement can be further attenuated independently without interfering with the relative slide of the first slide member, the second slide member, and the slide transmission member . Since the load on the rubber buffer can be reduced by the damping effect by the relative sliding of the slide member and the slide transmission member, the life of the rubber buffer can be extended.
more than

  Embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a view showing the support device of the present invention.

  The bearing device 1 is fixedly disposed between an upper steel plate 5 and a lower steel plate 9 fixed to the lower structure in an upper structure of a structure such as a building or a bridge.

  A first slide portion 11 is disposed at the center of the upper steel plate 5. Even if the first slide portion 11 is formed integrally with the upper steel plate 5, the first slide portion 11 is formed separately from the upper steel plate 5, and is fitted into an engagement groove formed in the upper steel plate 5 to be fixed or welded. It may be fixed by a fixing means such as. The first slide portion 11 includes a first sliding surface 12 made of a convex curved surface.

  A second slide portion 13 is disposed at the center of the lower steel plate 9. The second slide portion 13 may be formed integrally with the lower steel plate 9, and the second slide portion 13 is formed separately from the lower steel plate 9 and is fitted into an engagement groove formed in the lower steel plate 9 and fixed. You may fix and form by fixing means, such as welding. The second slide portion 13 includes a second sliding surface 14 having a convex curved surface. The first and second slide portions 11 and 13 are preferably made of durable metal such as steel.

  A slide transmission member 15 is disposed between the first and second slide portions 11 and 13 disposed on the upper and lower steel plates 5 and 9. A third sliding surface 16 having a concave curved surface is formed on the upper surface of the slide transmission member 15, and a fourth sliding surface 17 having a concave curved surface is formed on the lower surface of the slide transmission member 15. A slide transmitting member 15 is slidably engaged with the first sliding surface 12 formed of a concave curved surface formed on the upper surface of the slide transmitting member 15 and the first sliding surface 12 formed of the convex curved surface of the first sliding portion 11 so as to be in contact with each other. A fourth sliding surface 17 formed of a concave curved surface formed on the lower surface of 15 and a second sliding surface 14 formed of a convex curved surface of the second slide portion 13 engage with each other while being able to ride. The first and second slide portions 11 and 13 and the slide transmission member 15 constitute a slide bearing 18 that supports the vertical load of the upper structure 2. The slide transmission member 15 is preferably made of a durable metal such as steel.

  A through hole 20 is formed in the center of the slide member 15 where the wall thickness is the thinnest. The function of the through hole 20 will be described later.

  FIG. 3 is a plan view showing the support device according to the first embodiment of the present invention. In the first embodiment, the first and second sliding surfaces 12 and 14 formed of the convex curved surfaces of the first and second slide portions 11 and 13 are formed as convex curved surfaces obtained by cutting a part of a cylindrical shape, and slides are performed. The shapes of the third and fourth sliding surfaces 16 and 17 formed of concave curved surfaces formed on the upper and lower surfaces of the transmission member 15 are the same as the first and second formed of convex curved surfaces of the first and second slide portions 11 and 13. A concave curved surface that is in surface contact with the sliding surfaces 12 and 14 is used. Therefore, the upper and lower two sliding surfaces including the first sliding surface 12 and the third sliding surface 16 and the second sliding surface 14 and the fourth sliding surface 17 are slidable in two orthogonal directions. Stoppers 21 are arranged at both ends in the axial direction of the sliding surface of the uneven surface. As a result, it is possible to slide only in one direction in the radial direction of the uneven curved surface indicated by the arrow in FIG. When the bearing device of the present invention is used as a bridge bearing, the sliding in the direction of the bridge axis is allowed and the sliding in the direction perpendicular to the bridge axis is restrained, so the sliding direction of the arrow in FIG. A through hole 20 is formed in the center of the slide transmission member 15 where the wall thickness is the thinnest. A plurality of through holes 20 may be formed in the axially central portion of the thinnest wall according to the axial length of the slide transmission member 15. The function of the through hole 20 will be described later.

  FIG. 4 is a plan view showing the support device 1 according to the second embodiment of the present invention. In the second embodiment, the first and second sliding surfaces 12 and 14 formed of the convex curved surfaces of the first and second slide portions 11 and 13 are formed as convex spherical surfaces obtained by cutting a part of a spherical shape, and slide transmission is performed. The shapes of the third and fourth sliding surfaces 16 and 17 formed of concave curved surfaces formed on the upper and lower surfaces of the member 15 are the same as those of the first and second sliding surfaces 11 and 13 formed of convex spherical surfaces. The concave spherical surface is in surface contact with the sliding surfaces 12 and 14. Therefore, the upper and lower two sliding surfaces including the first sliding surface 12 and the third sliding surface 16 and the second sliding surface 14 and the fourth sliding surface 17 can slide in all directions. A through hole 20 is formed in the center of the slide member 15 where the wall thickness is the thinnest. The function of the through hole 20 will be described later.

  FIG. 5 is a diagram showing another embodiment of the support device 1 of the present invention. In the support device 1 of this embodiment, an upper steel plate 5 is fixed by a set bolt 4 to an upper rod 3 fixed to an upper structure 2 of a structure such as a building or a bridge. A lower steel plate 9 is fixed to a base plate 8 fixed to the lower structure 6 with anchor bolts 7 by connecting bolts 10. Since the structure of the slide support arrange | positioned between the upper steel plate 5 and the lower steel plate 9 is the same as that of embodiment shown by FIG. 1, description is abbreviate | omitted.

  In this embodiment, a rubber buffer 19 that supports a horizontal load is disposed outside the support device 1 shown in FIG. The rubber buffer 19 is composed of a laminated rubber bearing formed by laminating a plurality of reinforcing steel plates and rubber and arranging connecting steel plates on the upper and lower sides and integrally vulcanizing. The rubber buffer 19 fixes the upper and lower connecting steel plates to the upper and lower steel plates 5 and 9 through fixing means such as bolts.

  FIG. 6 is a view showing the support device 1 according to the third embodiment of the present invention. In Example 3, the rubber buffer 19 of the embodiment shown in FIG. 5 is linearly arranged on the outer side in the sliding direction of the unidirectional slide two-surface forced slide support device of Example 1 shown in FIG. The configuration of the slide support is the same as that of the first embodiment shown in FIG.

  FIG. 7 is a view showing a support device according to a fourth embodiment of the present invention. In Example 4, the rubber buffer 19 of the embodiment shown in FIG. 5 is concentrically arranged on the omnidirectionally slidable support device of Example 2 shown in FIG. The configuration of the slide support is the same as that of the second embodiment shown in FIG.

  FIG. 8 is a diagram for explaining the function of the through hole 20 formed at the center of the slide transmission member 15 where the wall thickness is the thinnest. When a large vertical displacement acts on a structure such as a building or a bridge during a large earthquake, the first and second sliding surfaces 12 and 14 including the convex curved surfaces of the first and second sliding members 11 and 13 are: It functions as a convex lens that focuses the stress in the vertical direction at the center as shown by the arrow. The stress concentrated in the center due to the convex lens effect is directed toward the thinnest central portion of the slide transmission member 15. However, since the through hole 20 is formed in the thinnest central portion of the slide transmission member, the stress concentrated in the center is caused by the wall pressure around the through hole 20 formed in the center of the slide transmission member 15. As shown by the arrows in the thick direction, the signals are distributed and transmitted.

  A large vertical load concentrated in the center due to the convex lens effect of the first and second slide transmission members 11 and 13 is caused by the through hole 20 formed in the thinnest central portion of the slide transmission member 15. Since it is dispersed in the thick peripheral part, it avoids breakage due to vertical displacement of the slide transmission member 15 at the time of earthquake, functions as a slide bearing, and functions as a seismic isolation bearing that attenuates a large load during an earthquake. be able to.

  9A and 9B, the operation of the support device 1 according to the embodiment shown in FIG. 1 will be described. FIG. 9A is a diagram illustrating a state in which the horizontal displacement is not applied to the upper structure, and FIG. 9B illustrates a state in which the horizontal displacement in the direction of arrow A is applied to the upper structure. FIG.

  As shown in FIG. 9B, when a horizontal load displacement in the direction of arrow A is applied to the upper structure, the first slide member 11 disposed on the upper steel plate 5 fixed to the upper structure 2 is moved to the arrow A. Try to slide in the same direction. The first slide member 11 has a first sliding surface 12 formed of a convex curved surface engaged with a third sliding surface 16 formed of a concave curved surface formed on the upper surface of the slide transmission member 15 in a surface contact state. Slide in the direction of arrow a along the third sliding surface 16. At that time, the sliding direction is changed because the horizontal sliding force in the direction of arrow A results in sliding in the direction of arrow a along the third sliding surface 16 formed of a concave curved surface. A resistance force due to the change of the sliding direction and a frictional force due to the sliding between the first and third sliding surfaces 12 and 16 are generated. The displacement in the horizontal direction from the upper structure 2 is attenuated by the resistance force and the frictional force generated by the sliding between the first slide member 11 and the slide transmission member 15.

  The resistance force and the frictional force accompanying the slide between the first slide member 11 and the slide transmission member 15 are transmitted to the slide transmission member 15 as a reaction force indicated by an arrow c in the direction opposite to the arrow a. The reaction force in the direction of the arrow c of the slide transmission member 15 is the fourth sliding surface 17 formed of a concave curved surface formed on the lower surface of the slide transmission member 15 and the second sliding surface formed of the convex curved surface of the second slide member 13. 14 is transmitted to the second slide member 13 through the surface contact, and the second slide member 13 is forcibly slid in the direction of the arrow b opposite to the arrow a which is the slide direction of the first slide member 11. Let The displacement in the horizontal direction from the upper structure 2 is further attenuated by the resistance force and the frictional force generated by the sliding between the second slide portion 13 and the slide transmission member 15.

  The bearing device 1 has a first sliding surface 12 formed of a convex curved surface of the first slide member 11 and a concave curved surface of the upper surface of the slide transmitting member 15 with respect to the horizontal displacement in the direction of arrow A of the superstructure. Slides in the direction of arrow a on the upper slide surface with the third slide surface 16, and a second slide surface 14 formed of a convex curved surface of the second slide member 13 and a fourth curved surface formed of a concave curved surface of the lower surface of the slide transmission member 15. Forcibly slide in the direction of arrow b on the lower slide surface with the slide surface 17. Since the arrow a direction and the arrow b direction are opposite directions, the horizontal displacement amount β of the first and second slide members 11 and 13 constituting the slide bearing is the horizontal displacement amount in the arrow A direction of the superstructure. It becomes 1/2 of α. Since the amount of horizontal displacement of the slide support 18 can be reduced, the dimensions of the slide support can be made compact, so that the installation space can be reduced, the installation work of the support can be facilitated, and the cost can be reduced.

  10 (a) and 10 (b), the operation of the support device of the embodiment shown in FIG. 5 will be described. FIG. 10A is a diagram illustrating a state in which a horizontal load is not applied to the upper structure 2, and FIG. 10B illustrates a state in which the horizontal displacement in the direction of arrow A is applied to the upper structure 2. FIG.

  As shown in FIG. 10B, when the horizontal displacement in the direction of arrow A is applied to the upper structure 2, the first slide member 11 disposed on the upper steel plate 5 fixed to the upper structure 2 is Try to slide in the same direction as arrow A. The first slide member 11 has a first sliding surface 12 formed of a convex curved surface and is in surface contact with a third sliding surface 16 formed of a concave curved surface formed on the upper surface of the slide transmission member 15. It slides in the direction of arrow a along the sliding surface 16. At that time, since the horizontal displacement in the direction of arrow A becomes a slide in the direction of arrow a along the third sliding surface 16 formed of a concave curved surface, the sliding direction is converted. A resistance force due to the change of the sliding direction and a frictional force due to the sliding between the first and third sliding surfaces 12 and 16 are generated. The displacement in the horizontal direction from the upper structure 2 is attenuated by the resistance force and the frictional force generated by the sliding between the first slide portion 11 material and the slide transmission member 15.

  The resistance force and the frictional force accompanying the slide between the first slide member 11 and the slide transmission member 15 are transmitted to the slide transmission member 15 as a reaction force indicated by an arrow c in the direction opposite to the arrow a. The reaction force in the direction of the arrow c of the slide transmission member 15 is the fourth sliding surface 17 formed of a concave curved surface formed on the lower surface of the slide transmission member 15 and the second sliding surface formed of the convex curved surface of the second slide member 13. 14 is transmitted to the second slide member 13 through the surface contact, and the second slide member 13 is forcibly slid in the direction of the arrow b opposite to the arrow a which is the slide direction of the first slide member 11. Let The horizontal load from the upper structure 2 is further attenuated by the resistance force and the frictional force generated by the sliding between the second slide member 13 and the slide transmission member 15.

  The horizontal displacement in the direction of arrow A from the upper structure 2 is also applied to the rubber buffer 19, and the rubber buffer 19 is shear-elastically deformed to attenuate the horizontal load.

  The horizontal direction accompanying the slide between the 1st sliding surface 12 of the 1st sliding member 11, and the 3rd sliding surface 16 formed in the upper surface of the slide transmission member 15 by the slide bearing 18 which supports the vertical load of the superstructure 2 The horizontal displacement by the forcible slide along the fourth sliding surface 17 formed on the lower surface of the slide transmission member 15 of the second slide member 13 forced by the reaction force generated in the slide transmission member 15 is attenuated. A large attenuation performance can be exhibited by the sliding of the upper and lower surfaces consisting of the displacement attenuation. Since the horizontal displacement from the upper structure 2 is attenuated by the slide support 18, the horizontal load applied to the rubber buffer 19 is reduced, and the rubber buffer 19 can be prevented from being damaged by the horizontal load.

  The slide bearing 18 has a first sliding surface 12 composed of a convex curved surface of the first sliding member 11 and a third curved surface composed of a concave curved surface on the upper surface of the slide transmitting member 15 with respect to a horizontal load in the direction of arrow A of the superstructure. A fourth sliding surface that slides in the direction of arrow a on the upper sliding surface with the sliding surface 16 and that has a second curved surface 14 that is a convex curved surface of the second sliding member 13 and a concave curved surface that is the lower surface of the slide transmitting member 15. 17 is forcibly slid in the direction of arrow b on the lower slide surface. Since the direction of the arrow a and the direction of the arrow b are opposite directions, the horizontal displacement amount β of the first and second slide members 11 and 13 constituting the slide bearing is a rubber buffer due to the horizontal load in the arrow A direction of the superstructure. The horizontal displacement amount α of 19 is ½. Since the amount of horizontal displacement of the slide support 18 can be reduced, the dimensions of the slide support can be made compact, so that the installation space can be reduced, the installation work of the support can be facilitated, and the cost can be reduced. Furthermore, since the load on the rubber buffer can be reduced by the two-surface forced slide support having a large damping capacity, the life of the rubber buffer can be extended.

It is a figure which shows a prior art. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention.

Explanation of symbols

  1: support device, 2: upper structure, 3: upper rod, 4: set bolt, 5: upper steel plate, 6: lower structure, 7: anchor bolt, 8: base plate, 9: lower steel plate, 10: connecting bolt, 11 : 1st slide member, 12: 1st sliding surface, 13: 2nd sliding member, 14: 2nd sliding surface, 15: Slide transmission member, 16: 3rd sliding surface, 17: 4th Sliding surface, 18: Slide support, 19: Rubber buffer, 20: Through hole, 21: Stopper

Claims (4)

A device for supporting structures such as buildings and bridges,
A first slide member forming a first sliding surface composed of a downward convex curved surface disposed in the upper structure;
A second slide member having a second sliding surface formed of an upward convex curved surface disposed in the lower structure;
Slide transmission which is arranged between the first and second slide members and which has third and fourth sliding surfaces formed on the upper and lower surfaces which are concave curved surfaces which are in surface contact with the first and second sliding surfaces. Members,
Have
A support device characterized in that a through hole is formed in the thin central portion of the slide transmission member to distribute the stress in the vertical direction during an earthquake in the thick peripheral direction. The convex curved surfaces of the first and second sliding surfaces are shaped by cutting a part of a cylindrical shape,
The shape of the third and fourth sliding surfaces is a concave curved surface in surface contact with the convex curved surfaces of the first and second sliding surfaces,
Stoppers are disposed at both axial ends of the first and second slide members and the slide transmission member,
The support device according to claim 1, wherein the slide of the first and second slide members via the slide transmission member is one direction of a radial slide. The first and second sliding surfaces are convex spherical surfaces;
The third and fourth sliding surfaces formed on the upper and lower surfaces of the slide transmitting member are concave spherical surfaces that are in surface contact with the convex spherical surfaces of the first and second sliding surfaces,
The support device according to claim 1, wherein the slide of the first and second slide members via the slide transmission member is slidable in all directions. A rubber buffer in which a plurality of reinforcing steel plates and rubber are laminated is fixedly disposed between the upper and lower structures on the outside of the first slide member, the second slide member, and the slide member. The support apparatus in any one of 1-3.

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