JP6049523B2 - Seismic isolation device - Google Patents

Description

  The present invention relates to a seismic isolation device in which seismic isolation members are arranged in multiple stages.

2. Description of the Related Art Conventionally, as a seismic isolation device in a heavy structure such as a nuclear facility, a multistage laminated rubber in which a plurality of laminated rubbers arranged at each stage are connected up and down by a connecting member and stacked in multiple stages is often used.
A steel plate is often used as the connecting member (see Patent Documents 1 and 2). In addition, Patent Document 1 describes that a rib or unevenness is provided on a steel plate in order to improve bending rigidity. Patent Document 2 describes a plate of H-shaped steel or the like in addition to a thick steel plate as a connecting member. It is described that they are used together.
Moreover, in such a seismic isolation device, vibration energy is converted into heat energy by the laminated rubber to attenuate the vibration. However, in order to dissipate the heat generated at this time and prevent performance deterioration of the laminated rubber, Patent Document 3 discloses. Describes that in a laminated rubber, a metal plate between the rubbers protrudes around to form a heat radiating portion.

JP 62-41874 A JP 2011-122602 A JP 2011-202691 A

However, when the connecting member is made of a steel plate, the plate thickness becomes as thick as about 200 mm to ensure the strength against horizontal force, and the weight increases, which makes it difficult to transport the connecting member and to manufacture the seismic isolation device. There was a problem. Even when H-shaped steel or the like is assembled in a plate shape, there are problems in terms of on-site processing, ease of assembly, weight, and the like.
In addition, due to the increased weight of the connecting member, vibration inherent to the connecting member tends to occur, and the behavior of the laminated rubber and the behavior of the seismic isolation device as a whole differ, which may affect the vibration performance of the structure. It was.
Furthermore, the seismic isolation device also has a problem of heat generation as described above. In addition to providing a heat dissipation mechanism in the laminated rubber itself as in Patent Document 3, it is efficient to have a heat dissipation mechanism as a connecting member. It is desirable because it can dissipate heat.

  The present invention has been made in view of the above-described problems, and its purpose is to facilitate the transportation of the connecting member and the manufacture of the seismic isolation device, and to reduce the vibration inherent to the connecting member by reducing the weight of the connecting member. Is to provide a seismic isolation device.

The present invention for achieving the above-mentioned object is a seismic isolation device in which a seismic isolation member for horizontal vibration is connected up and down by a connecting member, the connecting member having a plurality of steel materials arranged in a grid pattern. It is a seismic isolation device characterized by being formed.

In this invention, a seismic isolation member is connected up and down using the connection member which combined several steel materials in the shape of a cross. The seismic isolation member is, for example, laminated rubber, but may have other seismic isolation functions.
And, since the connecting member can be transported to the site in a state where individual steel materials as constituent members are divided, and these can be assembled and manufactured on site, the transportability is higher than when using steel plates as in the past. Is improved. In addition, the connecting members do not assemble H-shaped steel etc. in a plate shape, but are configured by combining individual steel materials in a cross-girder shape, so that the weight can be reduced and the structure is simple, so it is processed locally. It is easy to assemble, and seismic isolation devices can be easily manufactured on site by connecting this and seismic isolation members. When replacing or removing a member, it can be easily disassembled.
Furthermore, by reducing the weight of the connecting member, vibration inherent to the connecting member during an earthquake or the like can be reduced, and the behavior of individual seismic isolation members and the behavior of the entire seismic isolation device can be brought closer.
Further, since the connecting member has a hollow portion between the steel materials, the heat generated by the operation of the seismic isolation member is released to the hollow portion of the connecting member above or below it, thereby generating heat from the seismic isolation member. It becomes possible to prevent performance degradation. In addition to providing a heat dissipation mechanism in the laminated rubber itself by using a metal plate between the rubbers as a heat dissipation part as in Patent Document 3 above, it is possible to improve efficiency by providing a heat dissipation mechanism in the connecting member as in the present invention. It can dissipate heat well.

The steel material is preferably H-shaped steel.
By using H-shaped steel, a light and high strength connecting member can be manufactured.

In the connecting member, steel plates may be attached to the top and bottom of the steel materials arranged in a cross beam shape.
Thereby, a horizontal force can be distributed and burdened to each steel material and each seismic isolation member via a steel plate, and the seismic isolation performance can be further improved.

For example, the connecting member is formed in a cross-beam shape by vertically arranging a plurality of H-shaped steels so as to intersect on a plane.
A connecting member can be easily manufactured by arranging H-shaped steels vertically and combining them in a cross-beam shape. Further, when replacing or removing the members, it is only necessary to disassemble the H-shaped steels disposed above and below, so that the disassembly of the connecting member is also easy.

In addition, the connecting member may be formed by arranging a plurality of H-shaped steels in a parallel pattern on the same plane.
By manufacturing the connecting member by arranging the H-shaped steel in the same plane on the same plane, the integrity of the connecting member can be improved and the horizontal vibration can be more reliably transmitted to the seismic isolation member via the connecting member. Become.

  ADVANTAGE OF THE INVENTION According to this invention, while the conveyance of a connection member and manufacture of a seismic isolation apparatus are easy, the seismic isolation apparatus which can reduce the vibration intrinsic | native to a connection member by weight reduction of a connection member can be provided.

The figure which shows the outline of the seismic isolation device 4 The perspective view of the connection member 1 The figure which shows the outline of the seismic isolation device 14 The perspective view of the connection member 11

  Hereinafter, embodiments of the seismic isolation device of the present invention will be described in detail with reference to the drawings. The seismic isolation device of the present invention is installed in a lower part of a heavy structure such as a nuclear facility and used for seismic isolation, but can also be used for other structures.

[First Embodiment]
First, the seismic isolation device according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a diagram showing an outline of the seismic isolation device 4 according to the first embodiment. FIG. 1A is an elevation view of the seismic isolation device 4. FIG.1 (b) is sectional drawing of the horizontal direction of the seismic isolation apparatus 4, and is sectional drawing by arrow AA of Fig.1 (a). In FIG. 1B, in order to show the positional relationship between the laminated rubber 3 and the connecting member 1, the illustration of the upper flange 7 of the laminated rubber 3 is omitted, and the position of the laminated rubber 3 is indicated by a dotted line.

As shown in FIG. 1, the seismic isolation device 4 includes a connecting member 1, a plurality of laminated rubbers 3 (seismic isolation members), and the like.
The seismic isolation device 4 is a multi-layered structure in which a plurality of laminated rubbers 3 arranged on the same plane are connected vertically using a connecting member 1. As the laminated rubber 3, a conventional rubber having a seismic isolation function can be used as appropriate. FIG. 1A illustrates a connecting portion between the n-th laminated rubber 3 (n) and the (n + 1) -th laminated rubber 3 (n + 1).

  FIG. 2 is a perspective view of the connecting member 1. As shown in FIGS. 1 and 2, the connecting member 1 is formed as a cross-shaped member 2 composed of a plurality of H-shaped steels 1 a and a plurality of H-shaped steels 1 b.

A plurality of H-shaped steel la is arranged in parallel at a predetermined interval. Further, a plurality of H-shaped steels 1b are arranged in parallel at predetermined intervals below the H-shaped steel 1a so that the longitudinal direction is orthogonal to the longitudinal direction of the H-shaped steel 1a on a plane. In this way, the plurality of H-shaped steels 1a and the plurality of H-shaped steels 1b are arranged in a vertical pattern in the vertical direction to form the cross-shaped member 2.
These H-shaped steel 1a and H-shaped steel 1b are integrated by a method such as fastening with a mounting plate and a bolt or the like.

As shown in FIG. 1A, the laminated rubber 3 has an upper flange 7 on the upper surface and a lower flange 5 on the lower surface.
The upper flange 7 of the laminated rubber 3 (n) and the H-shaped steel 1b of the connecting member 1, and the lower flange 5 of the laminated rubber 3 (n + 1) and the H-shaped steel 1a of the connecting member 1 are also fastened with a mounting plate and bolts, etc. It is integrated by this method.

  In the first embodiment, a plurality of H-shaped steels 1a and a plurality of H-shaped steels 1b, which are constituent members, are transported to the site, and these are combined in a cross-beam shape as described above at the site to produce the connecting member 1. The seismic isolation device 4 is assembled by connecting the laminated rubber 3 of each step.

Thus, in 1st Embodiment, since the connection member 1 can convey each H-shaped steel 1a, 1b which is a structural member to the site in the state of dividing, and can assemble and manufacture these on site. Compared with the above-described conventional example using a steel plate as a connecting member, the transportability can be improved.
Further, the connecting member 1 is configured not by assembling H-shaped steel or the like into a plate shape, but by arranging the H-shaped steels 1a and 1b vertically and combining them in a cross-girder shape, so that the weight can be reduced and the structure is simple. Therefore, on-site processing and assembly are easy, and the seismic isolation device 4 can be easily manufactured on site by connecting this with the laminated rubber 3. When replacing or removing a member, it can be easily disassembled.
Furthermore, by reducing the weight of the connecting member 1, it is possible to reduce vibration inherent to the connecting member 1 during an earthquake or the like, and to make the behavior of the individual laminated rubber 3 close to the behavior of the seismic isolation device 4 as a whole.
Further, since the connecting member 1 has a hollow portion between the adjacent H-shaped steels 1a or between the H-shaped steels 1b, the heat generated by the operation of the laminated rubber 3 is generated by the connecting member 1 on or below it. By discharging into the hollow portion, it is possible to prevent performance degradation due to heat generation of the laminated rubber 3. In addition to providing a heat dissipation mechanism in the laminated rubber itself by using a metal plate between the rubbers as a heat dissipation part as in Patent Document 3, by providing a heat dissipation mechanism in the connecting member 1 as in the present invention, Heat can be efficiently radiated.

In FIG. 1 and FIG. 2 and the like, five H-shaped steels 1a and five H-shaped steels 1b are arranged, but more H-shaped steels 1a and H-shaped steels 1b may be used with a smaller interval. Good. Alternatively, the number of the H-shaped steel 1a and the H-shaped steel 1b may be reduced and the intervals may be increased.
As described above, the number of H-shaped steel 1a and H-shaped steel 1b to be used, the arrangement interval thereof, and the like can be variously determined in consideration of the strength necessary for the connecting member 1, the manufacturability, and the like.

[Second Embodiment]
Next, a seismic isolation device according to a second embodiment of the present invention will be described with reference to FIGS.
FIG. 3 is a diagram illustrating an outline of the seismic isolation device 14 according to the second embodiment. FIG. 3A is a vertical sectional view of the seismic isolation device 14. FIG. 3B is a horizontal cross-sectional view of the seismic isolation device 14. FIG. 3C is an enlarged cross-sectional view of the vicinity of the connecting portion between the connecting member 11 and the laminated rubber 3. 3A is a cross-sectional view taken along the arrow CC shown in FIG. 3B, FIG. 3B is a cross-sectional view taken along the arrow BB shown in FIG. 3A, and FIG. FIG. 4 is a cross-sectional view taken along arrow DD shown in FIG.

As shown in FIG. 3, the seismic isolation device 14 includes a connecting member 11, a plurality of laminated rubbers 3, and the like.
The seismic isolation device 14 is a multi-layered structure in which a plurality of laminated rubbers 3 arranged on the same plane are connected up and down using a connecting member 11. In FIG. 3A and the like, a connecting portion between the n-th laminated rubber 3 (n) and the (n + 1) -th laminated rubber 3 (n + 1) is illustrated.

FIG. 4 is a perspective view of the connecting member 11. In FIG. 4, the illustration of the steel plate 13b (see FIG. 3A) on the upper part of the cross beam member 12 is omitted.
As shown in FIGS. 3 and 4, the connecting member 11 includes a cross-girder member 12 made of a plurality of H-shaped steels 11a and a plurality of H-shaped steels 11b, and steel plates 13a and 13b.

A plurality of H-shaped steels 11a are arranged in parallel at predetermined intervals. The H-shaped steel 11b is arranged in parallel at a predetermined interval so that the H-shaped steel 11b is flush with the H-shaped steel 11a and the longitudinal direction is orthogonal to the longitudinal direction of the H-shaped steel 11a. In this way, the plurality of H-shaped steels 11a and the plurality of H-shaped steels 11b are arranged in a cross-beam shape on the same plane, and the cross-beam-shaped member 12 is formed.
The H-shaped steel 11a and the H-shaped steel 11b are integrated by a method such as fastening with a mounting plate and a bolt or welding.

As shown to Fig.3 (a), the steel plate 13a is attached to the lower part of the cross-beam-like member 12 by the H-shaped steel 11a and the H-shaped steel 11b.
As shown in FIG.3 (c), the H-shaped steel 11a and the steel plate 13a are connected by screwing the head bolt 23 into the screw hole 27 of the steel plate 13a through the hole 31 of the flange 29b of the H-shaped steel 11a. The H-shaped steel 11b and the steel plate 13a are connected in the same manner.

Further, as shown in FIG. 3A, the steel plate 13 b is attached to the upper part of the cross beam member 12.
As shown in FIG. 3 (c), the H-shaped steel 11a and the steel plate 13b are configured such that the headed bolt 25 is passed through the hole 33 of the steel plate 13b and the hole 35 of the flange 29a of the H-shaped steel 11a. Are connected by tightening. The H-shaped steel 11b and the steel plate 13b are connected in the same manner.

In addition, the attachment method of the steel plate 13a or the steel plate 13b is not restricted to this, It can determine suitably so that the cross-beam-shaped member 12 and the steel plates 13a and 13b may be integrated.
In addition, since the horizontal force applied to the connecting member 11 is mainly borne by the cross-shaped member 12, the steel plates 13a and 13b are thinner and lighter than the above-described conventional example using the steel plate as the connecting member. Can do.

  As shown in FIGS. 3 and 4, the H-shaped steel 11 a has a plurality of holes 19 in the web portion near the center in the longitudinal direction. Moreover, the steel plate 13a and the steel plate 13b have a hole 21 near the center. These holes 19 and 21 are used for working from the inside of the connecting member 11 by inserting a hand when adjusting the bolts as described above or adjusting the tightening of the bolts.

  As shown in FIG. 3A and the like, the laminated rubber 3 has an upper flange 17 on the upper surface and a lower flange 15 on the lower surface. The upper flange 17 and the steel plate 13a of the laminated rubber 3 (n) are fastened using, for example, bolts. Similarly, the lower flange 15 of the laminated rubber 3 (n + 1) and the steel plate 13b are also fastened using bolts or the like.

In the second embodiment, the plurality of H-shaped steels 11a, the plurality of H-shaped steels 11b, and the steel plates 13a and 13b are transported to the site, and the H-shaped steels 11a and 11b are combined in the form of a cross-beam as described above at the site. The connecting member 11 is manufactured by forming the member 12 and attaching the steel plates 13b and 13a to the upper and lower portions thereof. Thereafter, the connecting member 11 and the laminated rubber 3 of each step are connected to assemble the seismic isolation device 14.
Note that the H-shaped steels 11a and 11b may be transported to the site in advance in combination in a cross beam shape.

Thereby, also in 2nd Embodiment, the effect similar to 1st Embodiment is acquired.
Furthermore, in the second embodiment, the horizontal force can be distributed and applied to the H-shaped steels 11a and 11b and the respective laminated rubbers 3 through the steel plates, and the seismic isolation performance can be further improved.
In the first embodiment, steel plates may be attached to the upper and lower portions of the cross beam-like member 2 as in the second embodiment. Thereby, the effect similar to the above is acquired.

In addition, in the second embodiment, by arranging the plurality of H-shaped steels 11 a and 11 b in a cross-beam shape on the same plane, the integrity of the connecting member 11 is increased, and horizontal vibration is more reliably achieved via the connecting member 11. Can be conveyed to the laminated rubber 3.
On the other hand, in the first embodiment, the connecting members 1 are formed by arranging the H-shaped steels 1a and 1b vertically and combining them in the form of a cross beam, so that the connecting members can be easily manufactured and disassembled. What is necessary is just to select the structure of these connection members as needed.

In the above embodiment, the H-shaped steels are orthogonally crossed and arranged in a cross beam shape. However, the present invention is not limited to this, and the H-shaped steels can be obliquely arranged in a cross beam shape.
Moreover, although H-shaped steel was used for the connection member, other steel materials may be used. However, the use of H-shaped steel has the advantage that a lightweight and high-strength connecting member can be manufactured.
Furthermore, it is also possible to use other seismic isolation members having a seismic isolation function instead of laminated rubber, such as rolling bearings.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

DESCRIPTION OF SYMBOLS 1, 11 ......... Connecting member 1a, 1b, 11a, 11b ......... H-shaped steel 2, 12 ......... Cross-shaped member 3, 3 (n), 3 (n + 1) ......... Laminated rubber 4, 14 ... ... Seismic isolation device 5, 15 ......... Lower flange 7,17 ......... Upper flange 13a, 13b ......... Steel plate 29a, 29b ......... Flange

Claims (5)

A seismic isolation device in which a seismic isolation member for horizontal vibration is connected up and down by a connecting member,
The seismic isolation device, wherein the connecting member is formed by arranging a plurality of steel materials in a cross-beam shape.   The seismic isolation device according to claim 1, wherein the steel material is H-shaped steel.   In the said connection member, a steel plate is attached to the upper and lower sides of the steel materials arrange | positioned at the cross-beam shape, The seismic isolation apparatus of Claim 1 or Claim 2 characterized by the above-mentioned.   The seismic isolation device according to any one of claims 1 to 3, wherein the connecting member is formed in a cross beam shape by vertically arranging a plurality of H-shaped steels so as to intersect on a plane.   The seismic isolation device according to any one of claims 1 to 3, wherein the connecting member is formed by arranging a plurality of H-shaped steels in a grid pattern on the same plane.

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