JP2000193026A - Base isolation support device and base isolation structure having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation support device to form a through-hole for inserting an anchor bolt in a portion where a sufficient strength is provided and besides prevent the occurrence of a trouble that an installation work and an exchange work are extremely difficult to make because of the corner of a laminate being disturbed during threaded mounting of a nut member on an anchor bolt. SOLUTION: A base isolation support device 1 is formed that a plurality of elastic layers and a plurality of reinforcing plates are alternately laminated and comprises a square laminate 5 having four sides 4, as seen in a plane; square upper and lower rectangular mounting plates 10 and 11 arranged at the two end surfaces in a lamination direction of the laminate 5 and having four sides 8 and 9 as seen in a plane; and upper and lower shearing keys 12 and 13. The mounting plate 10 is arranged on the upper end surface of the laminate 5 such that the apex 42 of each corner part 41 of the laminate 5 is positioned, as seen in a plane, approximately at the central part of each side 8 of the mounting plate 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation support device for protecting structures such as office buildings, apartment houses, bridges, elevated roads and detached houses from earthquakes, and to a seismic isolation support device. Related to seismic isolation structure.

[0002]

As a seismic isolation support device for protecting a structure from an earthquake, there has been proposed a seismic isolation support device including a laminate in which elastic layers and reinforcing plates are alternately laminated. ing.

[0003] Such a seismic isolation support device is interposed between a foundation and a structure. In order to fix the seismic isolation support to the foundation and the structure, it is usually attached to both end surfaces of the laminate. The plate is formed by being fixed.

[0004] As such a laminated body and a mounting plate, those having a circular shape and a rectangular shape when viewed from a plane have been proposed. It is sometimes convenient from the viewpoint of manufacturability and for a specific purpose of use, and is often used.

In a conventional seismic isolation support device comprising a rectangular laminate and a mounting plate, each side of the mounting plate is generally parallel to each side of the laminate when viewed from a plane. The mounting plate is fixed to each end face of the stack in the stacking direction so that the laminate is positioned substantially at the center of the mounting plate.

[0006] In the seismic isolation support device, an anchor bolt fixed to a foundation and a structure is inserted into a through hole for inserting an anchor bolt formed in advance at each corner of the mounting plate. A nut member is screwed onto the anchor bolt and fixed to the foundation and the structure. As described above, each side of the mounting plate is parallel to each side of the laminate. Therefore, in the seismic isolation support device in which the mounting plate is fixed to each end surface of the laminate in the stacking direction, since each corner end of the laminate is located at each corner of the mounting plate, an anchor bolt is inserted into the mounting plate. In order to obtain sufficient strength, the through-holes to be formed must be formed near the tip of the corners of the laminated body in order to obtain sufficient strength, and the nut member must be screwed into the anchor bolt. When wearing, the corners of the laminate The tool can not be used successfully to rotate the member, installation work, there is a disadvantage to say that the replacement work is extremely difficult.

In order to solve the above problem, it is conceivable to simply increase the size of the mounting plate. However, if the mounting space for the mounting plate is limited, this solution is also difficult to immediately adopt. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and has as its object to eliminate the need to use a particularly large mounting plate, and to increase the degree of freedom of a portion where a through hole for inserting an anchor bolt is formed. It can be increased, and a through hole for inserting an anchor bolt can be formed in a portion where sufficient strength can be obtained. In addition, when the nut member is screwed into the anchor bolt, the corner of the laminate becomes an obstacle. To provide a seismic isolation support device and a seismic isolation structure equipped with the seismic isolation support device, which can solve the inconvenience that a tool for rotating a nut member cannot be used well and installation work and replacement work are extremely difficult. It is in.

[0009]

According to a first aspect of the present invention, there is provided a seismic isolation support device comprising an elastic layer and a reinforcing plate alternately laminated, and a rectangular laminate having four sides as viewed from a plane. And a rectangular mounting plate having four sides as viewed from a plane, provided at both end surfaces in the stacking direction of the stack, and a tip of each corner of the stack as viewed from the plane, Each of the mounting plates is disposed on each end face of the laminate so as to be located substantially at the center of each side of the mounting plate.

[0010] In the seismic isolation support device of the first aspect, the end of each corner of the laminated body is positioned substantially at the center of each side of the mounting plate, and each of the mounting plates is attached to each end surface of the laminated body. Since each corner of the mounting plate is not located at each corner of the mounting plate, each corner of the mounting plate is not substantially occupied by the laminate, in other words, each corner of the mounting plate that does not overlap. Therefore, at each corner of the mounting plate, it is possible to increase the degree of freedom of the formation portion of the through hole for inserting the anchor bolt, and to provide the through hole for inserting the anchor bolt at a portion where sufficient strength can be obtained. In addition, it can be said that when the nut member is screwed onto the anchor bolt, the corners of the laminate hinder the use of a tool for rotating the nut member, which makes the installation work and the replacement work extremely difficult. Such inconveniences can be resolved.

[0011] A steel plate or the like is used as the reinforcing plate, and in one preferred example, the uppermost and lowermost reinforcing plates include:
A reinforcing plate thicker than the other reinforcing plates is used. Examples of the elastic material used for the elastic layer include, for example, rubber materials such as ethylene propylene rubber, nitrile rubber, butyl rubber, natural rubber, silicone rubber, and polyurethane, and fillers such as graphite, carbon black, and asphalt. What is blended is used. The reinforcing plates and the elastic layers, which are alternately stacked, are vulcanized and adhered to each other and fixed to form a laminate.

Each of the mounting plates disposed on both end faces in the laminating direction of the laminated body is usually formed of a thick steel plate, and is attached to the uppermost and lowermost reinforcing plates of the laminated body via bolts, shearing keys and the like. In the shear direction, i.e., the horizontal direction, so as not to move relative to each other, but when the elastic layers are disposed at the uppermost and lowermost positions in the laminate, they are vulcanized and adhered to this elastic layer. They may be fixed so as not to move relative to each other.

In the seismic isolation support device according to the second aspect of the present invention,
In the first seismic isolation support device, each of the laminate and the mounting plate is square when viewed from above.

In the present invention, each of the laminate and the mounting plate may be square, preferably similar to each other when viewed from a plane. However, as in the second embodiment of the present invention, the laminate and the mounting plate are square. If so, the effects of the present invention can be obtained most. In the present invention, a square and a square are a substantially square,
The shape may be a square, for example, even if the corners are slightly rounded or include a shape that is slightly distorted in a diamond shape as a whole, and need not be an exact square.

In the seismic isolation support device according to the third aspect of the present invention,
In the first or second seismic isolation support device, a through hole for inserting an anchor bolt is formed at each corner of the mounting plate.

It is sufficient that at least one through hole is formed at each corner of the mounting plate. In order to further secure the through hole, it is necessary to insert a plurality of anchor bolts into other portions. Pass-through holes may be formed in the mounting plate, and it is preferable to form only one hole at each corner, but if there is space and further strength is required, multiple It may be formed.

In the seismic isolation support device according to the fourth aspect of the present invention,
In the seismic isolation support device according to any one of the first to third aspects, a lead support is provided so as to penetrate the laminate.

In the present invention, a lead strut may be provided as in the fourth embodiment in order to effectively absorb horizontal vibration energy due to an earthquake. However, a lead strut is provided instead. Without this, the seismic isolation support device of the present invention may be configured, and the number of lead struts is not limited to one, and a plurality of lead struts may be arranged to penetrate the laminate. Further, a high damping rubber may be used for the elastic layer to effectively absorb the horizontal vibration energy.

The seismic isolation structure of the present invention includes a foundation, the above-described seismic isolation support device disposed on the foundation, and the seismic isolation support device disposed on the seismic isolation support device. A seismic isolation support structure, the seismic isolation support device includes: an anchor bolt penetrating through each corner of one of the mounting plates disposed on the lower end face of the laminate; An anchor bolt fixed to the foundation by a nut member screwed to the base member, and penetrating each corner of the other mounting plate disposed on the upper end surface of the laminate, and a nut member screwed to the anchor bolt And is fixed to the structure.

The structures in the seismic isolation structure of the present invention include office buildings, apartment houses, bridges, elevated roads, detached houses, and the like. The foundations are the ground, concrete foundations formed on the ground. And piers.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention and its embodiments will be described in more detail with reference to preferred examples shown in the drawings. The present invention is not limited to this example.

1 to 4, the seismic isolation support device 1 of the present embodiment has a plurality of elastic layers 2 and a plurality of reinforcing plates 3 alternately stacked, and is viewed from a plane (the state shown in FIG. 2). A) a square laminate 5 having four sides 4 and upper and lower squares of a square having four sides 8 and 9, respectively, which are disposed on both end surfaces 6 and 7 in the laminating direction of the laminate 5 Mounting plate 1 of shape
0 and 11 and upper and lower shear keys 12 and 13.

In this embodiment, the reinforcing plate 3 includes a plurality of rectangular or disk-shaped thin reinforcing plates 21 and uppermost and lowermost rectangular or disk-shaped thick reinforcing plates 22 and 23. And a rectangular or disk-shaped elastic layer 2 which is vulcanized and adhered therebetween. Circular recesses 24 and 25 for fitting the shear keys 12 and 13 are formed in the central portions of the thick reinforcing plates 22 and 23, respectively.

In this embodiment, the rectangular parallelepiped laminated body 5 has a rectangular tubular covering layer 31 covering the elastic layer 2 and the reinforcing plate 3, and the covering layer 31 is the same as the elastic layer 2. Is integrally formed with the elastic layer 2 from the above material.

At approximately the center of each of the four corners 35 of the mounting plate 10, a through hole 36 for inserting an anchor bolt is formed. Similarly, the four corners 37 of the mounting plate 11 are formed.
A through hole 38 for inserting an anchor bolt is formed at a substantially central portion of each of them. Further, circular recesses 39 and 40 for fitting the shearing keys 12 and 13 are formed in the central portions of the mounting plates 10 and 11, respectively.

The mounting plate 10 is arranged such that the top end 42 of each corner 41 of the laminated body 5 is positioned substantially at the center of each side 8 of the mounting plate 10 when viewed from a plane, and 6, similarly, the mounting plate 11 is arranged such that the tip 42 of each corner 41 of the laminated body 5 is located substantially at the center of each side 9 of the mounting plate 11 when viewed from a plane. Lower end surface 7 of laminate 5
It is arranged in.

The shearing key 12 is fitted into the circular recess 24 and the circular recess 39, and the upper end face 6 of the laminate 5 of the mounting plate 10 is fitted.
The shear key 13 is fitted in the circular recess 25 and the circular recess 40, and the lower end face 7 of the laminated body 5 of the mounting plate 11 is prevented. Relative movement in the horizontal direction H is prevented.

The above-described seismic isolation support device 1 is used so as to constitute a structure 53 interposed between a foundation 51 and a structure 52. That is, the structure 53 is provided on the foundation 51 such as a concrete table formed on the ground, the seismic isolation support device 1 arranged on the foundation 51, and the seismic isolation support device 1,
A structure 52 such as an office building is seismically isolated and supported on the foundation 51 via the seismic isolation support device 1.

When the foundation 51 vibrates in the horizontal direction H during an earthquake, the structure 53 causes the laminate 5 of the seismic isolation support device 1 to undergo shear deformation in the horizontal direction H, thereby causing the structure 52 to roll. To reduce the vibration of structures 5
2 is protected.

The base isolation device 1 penetrates each corner 37 of the mounting plate 11 disposed on the lower end face 7 of the laminate 5 and
The fixing plate 1 is fixed to the foundation 51 by an anchor bolt 61 embedded in the base member 51 and a nut member 62 screwed to the anchor bolt 61, and disposed on the upper end surface 6 of the laminate 5.
The anchor bolt 63 embedded in the structure 52 and the nut member 64 screwed to the anchor bolt 63 penetrates each corner 35 of the O, and is fixed to the structure 52.

In the seismic isolation support device 1 described above, the tip 42 of each corner 41 of the laminated body 5 is positioned substantially at the center of each of the sides 8 and 9 of the mounting plates 10 and 11 so that the mounting plate 1
Since each of 0 and 11 is arranged on the laminate 5, each corner 41 of the laminate 5 is not located at each of the corners 35 and 37 of the mounting plates 10 and 11, and substantially, At each corner 35 and 37 of the mounting plates 10 and 11, the laminate 5
Therefore, the degree of freedom in the formation of the through holes 36 and 38 for inserting the anchor bolts can be increased at the corners 35 and 37 of the mounting plate, and sufficient strength can be obtained. Hole 3 in the area where
6 and 38 can be formed.

Further, in the seismic isolation support device 1, when the nut members 62 and 64 (the lower nut member 64 in the case of the nut member 64) are screwed to the anchor bolts 61 and 63,
The corners 41 of the laminated body 5 do not interfere, the nut members 62 and 64 can be easily rotated by a tool, and the installation work and the replacement work can be performed quickly and without difficulty.

It is to be noted that the seismic isolation support device 1 may be one in which a lead strut 71 is arranged so as to penetrate a substantially central portion of the laminated body 5 in the laminating direction as shown in FIG. As shown in the figure, not only one but also a plurality of them may be arranged to penetrate the laminate 5 in the laminating direction.

[0034]

According to the present invention, it is not necessary to use a particularly large mounting plate, and the degree of freedom in forming a through hole for inserting an anchor bolt can be increased, and a sufficient strength can be obtained. Can be formed in the through hole for inserting the anchor bolt, and when screwing the nut member to the anchor bolt, the corners of the laminate are in the way, and the tool for rotating the nut member can not be used well, It is possible to provide a seismic isolation support device and a seismic isolation structure equipped with the seismic isolation support device, which can also solve the inconvenience that the replacement work becomes extremely difficult.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along the line II shown in FIG. 2 of an example of a preferred embodiment of the present invention.

FIG. 2 shows a line II-II and (II)-in the example shown in FIG.
(II) It is a line sectional plan view.

FIG. 3 is a side view of the example shown in FIG.

FIG. 4 is a perspective view of the laminated body of the example shown in FIG.

FIG. 5 is a cross-sectional view of another example of the preferred embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seismic isolation support device 2 Elastic layer 3 Reinforcement plate 5 Laminated body 8, 9 side 10, 11 Mounting plate 41 Corner part 42 Tip

Continued on the front page F-term (Reference) 2D046 DA13 2D059 AA37 GG05 3J048 AA01 AD05 BA08 BD03 DA01 DA03 EA38

Claims (6)

[Claims] An elastic layer and a reinforcing plate are alternately laminated, and a rectangular laminate having four sides when viewed from a plane is disposed on both end surfaces in the laminating direction of the laminate. A rectangular mounting plate having four sides as viewed from above, wherein the top of each corner of the laminate is positioned substantially at the center of each side of the mounting plate when viewed from a plane. Is a seismic isolation support device that is disposed on each end face of the laminate. 2. The seismic isolation support device according to claim 1, wherein each of the laminate and the mounting plate is square when viewed from above. 3. The seismic isolation support device according to claim 1, wherein a through hole for inserting an anchor bolt is formed at each corner of the mounting plate. 4. The seismic isolation support device according to claim 1, wherein a lead support is provided through the laminate. 5. A foundation and a base disposed on said foundation.
The seismic isolation support device according to any one of items 1 to 4, and a structure that is disposed on the seismic isolation support device and is seismically isolated and supported on a foundation via the seismic isolation support device. The seismic isolation support device is fixed to the foundation by an anchor bolt penetrating each corner of one of the mounting plates disposed on the lower end surface of the laminate and a nut member screwed to the anchor bolt. A seismic isolation structure fixed to a structure by an anchor bolt penetrating each corner of the other mounting plate disposed on the upper end surface of the laminate and a nut member screwed to the anchor bolt. 6. A laminated body or a mounting plate used for the seismic isolation support device according to any one of claims 1 to 4 or the seismic isolation structure according to claim 5.