JP2011099544A - Base isolation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base isolation device capable of suppressing rocking by a simple structure. <P>SOLUTION: In a circle center of a vertical laminated rubber body 20 and an attachment plate 22A, a through-hole 28 penetrating the vertical laminated rubber body 20 in the thickness direction (an arrowhead B direction) is formed. In the through-hole 28, an insertion protrusion member 30 is inserted. The insertion protrusion member 30 is formed into a columnar shape, and its one end 30B is fixed on the upper surface of the attachment plate 22B and the other end 30A is protruded to the outside of the vertical laminated rubber body 20 from the through-hole 28. The other end 30A of the insertion protrusion member 30 is inserted in an insertion hole 52 of a structure 50. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a laminated rubber body used in a seismic isolation device and a seismic isolation device using the laminated rubber body.

  Conventionally, seismic isolation devices have been used to protect buildings and structures from vibrations such as earthquakes. And as this seismic isolation apparatus, what is called a three-dimensional seismic isolation apparatus corresponding to the vibration of not only a horizontal direction but a vertical direction is known (for example, refer patent documents 1-3).

By the way, since the three-dimensional seismic isolation device has a configuration with low rigidity in the vertical direction, a rocking phenomenon is likely to occur. For this reason, in Patent Document 3, locking is suppressed by a spring and a hydraulic cylinder, but the apparatus becomes a large scale, which takes time for construction and increases the cost.

JP-A-6-264643 JP-A-6-346628 JP-A-2004-69067

  An object of the present invention is made in consideration of the above facts, and an object thereof is to provide a seismic isolation device capable of suppressing locking with a simple configuration.

  To achieve the above object, a seismic isolation device according to a first aspect of the present invention includes a horizontal laminated rubber body in which horizontal rubber and horizontal metal plates are alternately laminated, and is elastically deformable in the laminating direction. A vertical elastic member provided with a vertical elastic member that is less rigid in the vertical direction than the horizontal laminated rubber body and is laminated on the horizontal laminated rubber body in the same direction as the laminating direction; An insertion convex member that passes through the elastic member for insertion, is disposed in parallel with the vertical elastic member along the stacking direction, and protrudes outward from the vertical elastic member to be inserted into a support hole formed in the structure. It is equipped with.

  In the first aspect of the present invention, the horizontal laminated rubber body and the vertical seismic isolation body are laminated. The vertical seismic isolation body has lower vertical rigidity than the horizontal laminated rubber body, and mainly exhibits a vibration damping function in the vertical direction.

  On the other hand, the vertical seismic isolation body has a configuration with low rigidity in the vertical direction, and a rocking phenomenon is likely to occur, and thus an insertion convex member is provided. The insertion convex member passes through the vertical elastic member and is disposed in parallel with the vertical elastic member along the stacking direction. And it protrudes to the outer side of the elastic member for perpendicular | vertical, and is inserted in the support hole comprised by the structure. By using such an insertion convex member as a member having rigidity capable of resisting the falling moment of the structure, the vertical elastic member is tilted and the structure is tilted with a simple configuration. A reaction force can be applied, and locking can be suppressed.

  In the seismic isolation device according to the second aspect of the present invention, the vertical elastic member is composed of vertical rubber having a thickness greater than that of the horizontal rubber, and the vertical seismic isolation body includes the vertical rubber and the vertical rubber. It is a laminated rubber body for vertical construction constituted by alternately laminating vertical metal plates.

  In this way, the vertical seismic isolation body can have the same configuration as the horizontal laminated rubber body by alternately laminating the vertical rubber and the vertical metal plate.

  The seismic isolation device according to a third aspect of the present invention is characterized in that the insertion convex member is in non-contact with the vertical laminated rubber body in a state where vibration is not input.

  Thus, it can manufacture easily by making an insertion convex member non-contact with the laminated rubber body for perpendicular | vertical.

  In the seismic isolation device according to the fourth aspect of the present invention, the vertical seismic isolation body includes a base plate on which the vertical elastic body is fixed to an upper surface, and one end of the insertion convex member is fixed to the base plate. It is characterized by that.

  Thus, the insertion convex member which penetrates the vertical elastic body can be arranged in parallel with the vertical elastic body by fixing one end of the insertion convex member to the base plate to which the vertical elastic body is fixed.

  The seismic isolation device according to the fifth aspect of the present invention is disposed outside the vertical elastic portion in parallel with the vertical elastic member, and protrudes outward from the vertical elastic member to restrict the tilting of the structure. The reinforcing convex member is further provided.

  A reinforcement convex member can be arrange | positioned in parallel with the elastic part for insertion perpendicular | vertical, and the tilting of a structure can be controlled more firmly.

  As described above, according to the present invention, locking can be suppressed with a meter reading device having a simple configuration.

It is a perspective view of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the state which has arrange | positioned the seismic isolation apparatus which concerns on 1st Embodiment of this invention between a structure and the foundation. It is sectional drawing which shows the operation state of the seismic isolation apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the state which has arrange | positioned the seismic isolation apparatus which concerns on 2nd Embodiment of this invention between a structure and the foundation. It is a top view of the seismic isolation apparatus which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the operation state of the seismic isolation apparatus which concerns on a comparative example.

[First Embodiment]
Hereinafter, the seismic isolation apparatus 10 which concerns on embodiment of this invention is demonstrated with reference to drawings.
1 and 2 show a seismic isolation device 10 according to a first embodiment of the present invention. The seismic isolation device 10 includes a horizontal laminated rubber body 12 and a vertical laminated rubber body 20.

  The horizontal laminated rubber body 12 includes a laminated body in which a plurality of disc-shaped horizontal metal plates 18 and a plurality of disc-shaped horizontal rubber plates 16 are alternately laminated in the thickness direction (arrow B direction). Has been. The horizontal metal plate 18 and the horizontal rubber 16 are firmly integrated by vulcanization adhesion. Thus, by laminating not only the horizontal rubber 16 but also the horizontal metal plates 18, these have a predetermined rigidity with respect to the load in the vertical direction (arrow B direction), With respect to a load in the horizontal direction (arrow E direction), a spring function is exhibited and a predetermined deformation amount can be secured.

  The outer diameter of the horizontal metal plate 18 is smaller than the outer diameter of the horizontal laminated rubber body 12, and a covering rubber 19 is disposed in a cylindrical shape on the outer edge of the horizontal metal plate 18. The horizontal metal plate 18 is covered with the covering rubber 19, and the horizontal metal plate 18 is not exposed to the outside, so that deterioration is prevented.

  Mounting plates 14A and 14B are fixed to both ends of the horizontal laminated rubber body 12 in the thickness direction (arrow B direction). The mounting plates 14A and 14B are made of thick annular steel plates.

  The mounting plates 14A and 14B are respectively fixed to a foundation 54 (see FIG. 3) installed on the ground and a mounting plate 22B described later of the laminated rubber body 20 for vertical use. In this state, when the ground (and the foundation) and the structure are relatively moved in the horizontal direction, the vibration energy of the relative movement is partially absorbed by the shear deformation of the horizontal laminated rubber body 12.

  The vertical laminated rubber body 20 includes a laminated body in which a plurality of disc-shaped vertical metal plates 24 and a plurality of disc-shaped vertical rubber plates 26 are alternately laminated in the thickness direction (arrow B direction). Has been. The vertical rubber 26 is thicker than the horizontal rubber 16, the vertical rigidity of the vertical laminated rubber body 20 is smaller than the vertical rigidity of the horizontal laminated rubber body 12, and the natural vibration frequency is reduced. ing. For example, the natural vibration frequency of the horizontal rubber 16 can be set to 2 to 4 / sec, and the natural vibration frequency of the vertical laminated rubber body 20 can be set to 0.3 to 3 / sec. The vertical metal plate 24 and the vertical rubber 26 are firmly integrated by vulcanization adhesion. Thus, by reducing the rigidity in the vertical direction, the vibration damping function can be exhibited by the elastic deformation in the vertical direction (arrow B direction) of the vertical laminated rubber body 20.

  Mounting plates 22A and 22B are fixed to both ends of the vertical laminated rubber body 20 in the thickness direction (arrow B direction). The mounting plates 22A and 22B are made of thick annular steel plates.

  The outer diameter of the vertical metal plate 24 is smaller than the outer diameter of the vertical laminated rubber body 20, and a covering rubber 25 is disposed in a cylindrical shape on the outer edge of the vertical metal plate 24. The vertical metal plate 24 is covered with the covering rubber 25, and the vertical metal plate 24 is not exposed to the outside, so that deterioration is prevented. The attachment plates 22A and 22B are fixed to the structure 50 and the attachment plate 14A of the horizontal laminated rubber body 12, respectively. In this state, vibration energy in the vertical direction is partially absorbed by elastic deformation of the vertical laminated rubber body 20.

  A through hole 28 that penetrates the vertical laminated rubber body 20 in the thickness direction (arrow B direction) is formed in a circular center portion of the vertical laminated rubber body 20 and the mounting plate 22A. An insertion convex member 30 is inserted into the through hole 28. The insertion convex member 30 has a cylindrical shape, one end 30B is fixed to the upper surface of the mounting plate 22B, and the other end 30A projects from the through hole 28 to the outside of the vertical laminated rubber body 20. The insertion convex member 30 is not in contact with the inner wall of the vertical laminated rubber body 20 constituting the through hole 28 in a state where no vibration is input. The insertion convex member 30 can be made of a highly rigid metal material such as general structural rolled steel / SS400 or welded structural rolled steel / SM490. The other end 30A of the insertion convex member 30 is inserted into an insertion hole 52 of the structure 50, which will be described later.

  An insertion hole 52 is formed in the bottom of the structure 50. The protruding length L of the insertion convex member 30 to the outside of the vertical laminated rubber body 20 is shorter than the depth of the insertion hole 52. Therefore, as shown in FIG. 3, the mounting plate 22 </ b> A can be fixed to the lower surface of the structure 50, and all portions protruding from the mounting plate 22 </ b> A of the insertion convex member 30 can be inserted into the insertion holes 52.

  The other end 30 </ b> A of the insertion convex member 30 inserted into the insertion hole 52 is not in contact with the inner wall of the structure 50 constituting the insertion hole 52 in a state where no vibration is input.

  Next, the operation of the seismic isolation device 10 will be described.

  The seismic isolation device 10 is disposed between the structure 50 and the foundation 54, and the attachment plate 14 </ b> B is fixed to the foundation 54 and the attachment plate 22 </ b> A is fixed to the lower surface of the structure 50. Then, the insertion convex member 30 is inserted into the insertion hole 52 of the structure 50.

  Normally, a vertical load is received from the structure. When the horizontal movement between the foundation 54 and the structure 50 is caused by an earthquake or the like, a part of the vibration energy is absorbed by the shear deformation of the horizontal laminated rubber body 12, and the vibration can be attenuated.

  As for the vibration component in the vertical direction, a part of the vibration component is absorbed by the vertical elastic deformation of the vertical laminated rubber body 20, and the vibration can be attenuated. At this time, if the laminated body which is not provided with the insertion convex member 30 and is simply laminated with the vertical rubber 26 and the vertical metal plate 24 is used for vibration attenuation in the vertical direction, as shown in FIG. Due to M, the elastic deformation of the vertical rubber 26 is biased and locking occurs.

  When the insertion convex member 30 is provided as in this embodiment, the overturning moment M of the structure 50 that is generated is suppressed by the reaction force F from the insertion convex member 30 as shown in FIG. Therefore, the locking of the structure 50 can be suppressed.

  According to the seismic isolation device 10 of the present embodiment, as described above, one end portion 30B of the insertion convex member 30 is inserted into the vertical laminated rubber body 20 and arranged in parallel, and the other end portion 30A is connected to the structure 50. Locking can be suppressed with a simple configuration of inserting into the insertion hole 52.

  In the present embodiment, the vertical laminated rubber body 20 is used for vibration damping in the vertical direction, but other members that can be elastically deformed in the vertical direction, for example, springs such as air springs, are used for the vertical. Instead of the laminated rubber body 20, it may be used.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In this embodiment, the point provided with the auxiliary | assistant convex member 32 and the attachment structure to the structure 50 differ from 1st Embodiment, About another structure, it is the same as that of 1st Embodiment.

  As shown in FIGS. 5 and 6, the auxiliary convex member 32 has a cylindrical shape, and four auxiliary convex members 32 are erected on the upper surface of the mounting plate 22 </ b> B. The four auxiliary convex members 32 are fixed to the upper surface of the mounting plate 22B at equal intervals along the outer peripheral edge of the mounting plate 22B, extend upward from the mounting plate 22A, and have the same height as the insertion convex member 30. It is said. As with the insertion convex member 30, the auxiliary convex member 32 can be made of a highly rigid metal material.

  The structure 50 has a supported portion 56 formed at the bottom. The supported portion 56 protrudes in a cylindrical shape from the lower surface of the structure 50, and an insertion hole 52 is formed at the center.

  The seismic isolation device 60 is disposed between the supported portion 56 and the base 54 of the structure 50, and the mounting plate 14 </ b> B is fixed to the base 54 and the mounting plate 22 </ b> A is fixed to the lower surface of the supported portion 56. Then, the insertion convex member 30 is inserted into the insertion hole 52.

  Also in the present embodiment, the vibration component in the vertical direction is partially absorbed by the elastic deformation in the vertical direction of the vertical laminated rubber body 20, and the vibration can be damped. At this time, the overturning moment M of the structure 50 is suppressed by the reaction force F from the insertion convex member 30. Furthermore, in this embodiment, since the auxiliary convex member 32 is provided, the tilt of the supported portion 56 of the structure 50 can be more reliably suppressed.

DESCRIPTION OF SYMBOLS 10 Seismic isolation device 12 Laminated rubber body 16 Horizontal rubber 18 Horizontal metal plate 20 Vertical laminated rubber body 24 Vertical metal plate 26 Vertical rubber 28 Through hole 30 Insertion convex member 30A Other end 30B One end 32 Auxiliary Convex member 50 Structure 52 Insert hole 54 Base 60 Seismic isolation device

Claims (5)

A horizontal laminated rubber body in which horizontal rubber and horizontal metal plates are alternately laminated;
A vertical elastic member that is elastically deformable in the laminating direction is provided, has a lower vertical rigidity than the horizontal laminated rubber body, and is laminated on the horizontal laminated rubber body in the same direction as the laminating direction. A base isolation body,
An insertion protrusion that passes through the vertical elastic member, is arranged in parallel with the vertical elastic member along the stacking direction, and protrudes outward from the vertical elastic member to be inserted into a support hole formed in a structure. Members,
Seismic isolation device with   The vertical elastic member is composed of vertical rubber having a thickness greater than that of the horizontal rubber, and the vertical seismic isolation body is configured by alternately stacking the vertical rubber and the vertical metal plate. The seismic isolation device according to claim 1, wherein the seismic isolation device is a laminated rubber body for vertical use.   The seismic isolation device according to claim 2, wherein the insertion convex member is in non-contact with the vertical laminated rubber body in a state where vibration is not input. The vertical seismic isolation body includes a base plate on which the vertical elastic body is fixed to an upper surface,
4. The seismic isolation device according to claim 1, wherein one end of the insertion convex member is fixed to the base plate. 5.   The reinforcing convex member further disposed outside the vertical elastic portion in parallel with the vertical elastic member and protruding outward from the vertical elastic member to restrict the horizontal movement of the structure. The seismic isolation device according to any one of claims 1 to 4.

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