JP6049524B2 - 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). Patent Document 1 describes that a rib or unevenness is provided on a steel plate in order to improve bending rigidity.

  In general, the laminated rubber and the connecting member include the upper flange of the lower laminated rubber, a connecting member, a method of fixing the lower flange of the upper laminated rubber with a bolt, or the upper flange side and the upper laminated rubber of the lower laminated rubber. The bolts are respectively inserted from the lower flange side and connected to the connecting member.

JP 62-41874 A JP 2011-122602 A

  The thickness of the connecting member is set so as to satisfy the condition that the maximum moment of the connecting member does not exceed the total plastic moment even if the laminated rubber is subjected to a large horizontal deformation. At this time, since the flange of the laminated rubber is in a condition that does not bear stress, there is a problem that the thickness of the connecting member becomes thick. When the member thickness is large, the weight increases, and transportation and construction become difficult.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a seismic isolation device that can reduce the stress imposed on the connecting member and reduce the weight of the connecting member.

  In order to achieve the above-described object, the present invention provides a seismic isolation device in which a plurality of seismic isolation members having upper and lower flange portions are arranged on each stage, and the upper and lower seismic isolation members are connected vertically via a coupling member. In the apparatus, at least one of the upper stage and the lower stage is provided with a fitting material that fits between the flange portions on the side of the connecting member facing the adjacent seismic isolation members, and the fitting material and the connecting member This is a seismic isolation device characterized by connecting

  Thereby, since the stress of a connection member can be borne by a flange via a fitting material with respect to a horizontal force, the stress which a connection member bears becomes small. If the stress which bears becomes small, it will become possible to make member thickness thinner than before, a connection member will become lighter, and a conveyance property and workability will improve.

A flange portion on the side of the connecting member facing the adjacent seismic isolation member is provided with a notched portion that is notched so that the connecting member side is widened, and the fitting material is fitted between the notched portions. It is desirable to arrange.
Thereby, a fitting material and a flange part can be meshed | combined and the stress of a connection member can be suitably transmitted now to a flange part via a fitting material.

For example, the notch portion is formed by notching the flange portion in an oblique direction.
As a result, a wedge-shaped fitting material is fitted between the cutout portions, whereby the stress of the connecting member can be reliably transmitted to the flange portion.

Furthermore, fitting the upper and lower seismic isolation member, arranged so as to face all the upper and lower positions, in both upper and lower, between the flange portion of the coupling member side facing the seismic isolation member adjacent It is desirable to arrange the fitting material to be connected, and to connect the fitting material and the connecting member in the upper and lower stages.
Thereby, the stress of the connecting member can be borne by the flange portions of the upper and lower seismic isolation members, and the connecting member can be further thinned. Moreover, since the position of a fitting material is made to respond | correspond up and down, and a connection member and the upper and lower fitting materials arrange | positioned so that this connection member may be pinched | interposed can be integrated, the intensity | strength of this connection part increases.

Further, the connecting member may be a steel plate having a cavity at a planar position corresponding to the upper or lower seismic isolation member.
In the present invention, since the stress of the connecting member is partially borne by the flange portion and the stress applied to the connecting member can be reduced, a cavity is provided in the connecting member at a position corresponding to the seismic isolation member, thereby further reducing the weight of the connecting member. It becomes.

  ADVANTAGE OF THE INVENTION According to this invention, the stress which a connection member bears can be reduced and the seismic isolation apparatus which can reduce the weight of a connection member can be provided.

Elevated view of seismic isolation device 2 The figure which shows the structural member of the seismic isolation apparatus 2 The figure which looked at the cross section by the arrow AA of FIG. Enlarged view of range B in FIG. The figure which shows the connection member 13a The figure which shows other embodiment of a seismic isolation apparatus

  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.

  FIG. 1 is an elevation view of the seismic isolation device 2 of the first embodiment. FIG. 2 is a diagram showing components of the seismic isolation device 2. FIG. 2A is an elevation view of the laminated rubber 1a and 1b. FIG. 2B is a plan view of the connecting member 13. FIG. 2C is a perspective view of the fitting material 15. 3 is a cross-sectional view of the seismic isolation device 2 taken along the arrow AA shown in FIG. 1. FIG. 3 (a) shows a state before the fitting member 15 and the like are attached to the connecting member 13, and FIG. b) shows the state after attaching the fitting material 15 and the like.

As shown in FIG. 1 etc., the seismic isolation apparatus 2 consists of laminated rubber 1a, 1b, the connection member 13, and the fitting material 15 grade | etc.,.
In the seismic isolation device 2, a plurality of laminated rubbers 1 a, 1 b (seismic isolation members) arranged on the same plane are connected up and down using a connecting member 13 and stacked in multiple stages. As the laminated rubbers 1a and 1b, conventional rubber having a seismic isolation function can be used as appropriate.

  As shown in FIGS. 1 and 2A, the laminated rubbers 1a and 1b have lower flanges 3a and 3b (flange portions) at the lower ends and upper flanges 5a and 5b (flange portions) at the upper ends, respectively. These flanges are formed of, for example, a steel plate.

In the present embodiment, the outer edge portion 7a of the lower flange 3a (the flange portion on the connecting member 13 side) of the upper laminated rubber 1a is cut off in an oblique direction so that the cross section in the flange height direction is widened on the connecting member 13 side. A notch 9a is provided.
Further, the outer flange portion 7b of the upper flange 5b of the lower laminated rubber 1b (the flange portion on the connecting member 13 side) is similarly cut off in an oblique direction so that the cross section in the flange height direction is widened on the connecting member 13 side. A notch 9b is provided.

  Moreover, as shown to Fig.3 (a), the bolt hole 23a is provided in the predetermined | prescribed position in the lower flange 3a of the upper laminated rubber 1a. The upper flange 5b of the lower laminated rubber 1b is also provided with a bolt hole (a bolt hole 23b described later) at a position corresponding to the bolt hole 23a.

  As shown in FIG. 1, FIG. 2 (b), etc., the connecting member 13 is a single piece of rectangular flat steel plate, and includes the lower flange 3a of the upper laminated rubber 1a and the upper flange 5b of the lower laminated rubber 1b. A flange bolt hole 17 for connection is provided. A fitting material bolt hole 19 for connecting the fitting material 15 is also provided.

  As shown in FIGS. 1 and 2C and the like, the fitting member 15 is a rod-shaped member and has a wedge-shaped cross section in which two adjacent corners of a quadrilateral are cut out obliquely. The fitting member 15 is provided with a bolt hole 21 for connecting to the connecting member 13.

  As shown in FIG. 1, FIG. 3 (a), etc., in the seismic isolation device 2, the upper laminated rubber 1a and the lower laminated rubber 1b are arranged in 2 × 2 rows, respectively, and the upper laminated rubber 1a and the lower laminated rubber 1b The position of the laminated rubber 1b corresponds.

  The four laminated rubbers 1a in the upper stage are arranged so that the laminated rubbers 1a adjacent to each other in the vertical and horizontal directions face each other with the notches 9a. Similarly, the four lower laminated rubbers 1b are also arranged so that the cutouts 9b face each other between the laminated rubbers 1b adjacent in the vertical and horizontal directions.

As shown in FIG. 1, FIG. 3B, etc., in the upper stage, the fitting material 15 is disposed so as to fit between the facing notches 9a of the adjacent laminated rubber la. Also in the lower stage, the fitting member 15 is arranged so as to fit between the opposed notches 9b of the adjacent laminated rubber 1b.
The laminated rubbers 1a and 1b are arranged in a grid shape, and these fitting members 15 are arranged in a cross shape vertically and horizontally between the laminated rubbers 1a and 1b.

  The inclination angle of the taper portion 29 (see FIG. 2C) of the fitting material 15 is matched to the inclination angle of the notch portion 9a of the lower flange 3a of the laminated rubber 1a and the notch portion 9b of the upper flange 5b of the laminated rubber 1b. The fitting material 15 is fitted between the opposed cutouts 9a and 9b.

  As shown in FIG. 1, the upper and lower fitting members 15 and the connecting member 13 are connected using a connecting jig 31. Further, the lower flange 3 a of the upper laminated rubber 1 a, the connecting member 13, and the upper flange 5 b of the lower laminated rubber 1 b are connected using a connecting jig 33.

  FIG. 4 is an enlarged view of the vicinity of these connecting portions, and is an enlarged view of a range B shown in FIG.

  The connecting jig 31 is composed of a headed bolt 31a and a nut 31b, and aligns the positions of the bolt holes 21 of the upper and lower fitting members 15 and the fitting material bolt holes 19 of the connecting member 13 so that the upper fitting material is located. By inserting the headed bolt 31a from the 15th side and tightening the nut 31b from the lower fitting material 15 side, the upper and lower fitting material 15 and the connecting member 13 are connected.

  The connecting jig 33 also includes a headed bolt 33a and a nut 33b. The bolt hole 23a of the lower flange 3a of the upper laminated rubber 1a, the flange bolt hole 17 of the connecting member 13, and the upper flange of the lower laminated rubber 1b. 5b bolt holes 23b are aligned, head bolts 33a are inserted from the lower flange 3a side of the upper laminated rubber 1a, and nuts 33b are tightened from the upper flange 5b side of the lower laminated rubber 1b. The lower flange 3a of the laminated rubber 1a, the connecting member 13, and the upper flange 5b of the lower laminated rubber 1b are connected.

  Thus, according to the first embodiment, the plurality of upper laminated rubbers 1a are arranged so that the notches 9a of the lower flange 3a face each other, and the lower laminated rubbers 1b are arranged on the upper flange 5b. It arrange | positions so that the notch part 9b may oppose. Then, a wedge-shaped fitting material 15 is fitted between the notch portions 9a facing each other and between the notch portions 9b, and the fitting material 15 on the upper and lower stages and the connecting member 13 are connected to each other. 31 is used for connection.

  Thereby, from the contact surface between the tapered portion 29 of the upper fitting material 15 and the cutout portion 9a of the lower flange 3a, the contact surface between the taper portion 29 of the lower fitting material 15 and the cutout portion 9b of the upper flange 5b, Since the stress of the connecting member 13 can be reliably transmitted to each flange, the stress borne by the connecting member 13 with respect to the horizontal force is reduced. If the stress which bears the connection member 13 becomes small, it will become possible to make member thickness thinner than before, a weight will become light, and transportability and workability will improve. Moreover, since the connection member 13 is inserted | pinched by the upper and lower fitting materials 15, and these are connected and integrated, the intensity | strength of a connection part is also high.

The connecting member is not limited to that described in the first embodiment.
FIG. 5 is a view showing another connecting member 13a. Instead of the connecting member 13 of the first embodiment, as shown in FIG. 5, a steel plate having a lattice shape provided with a cavity 39 in a planar position corresponding to the upper laminated rubber 1a and the lower laminated rubber 1b is used as the connecting member 13a. It may be used as In the present invention, since a part of the stress of the connecting member is borne on the flange and the stress applied to the connecting member is reduced, the connecting member is located at the position corresponding to the upper laminated rubber 1a and the lower laminated rubber 1b. A part of 13a can be used as a cavity 39, and further weight reduction can be achieved. Furthermore, as the connecting member, it is possible to use a member other than a steel plate, such as a combination of H-shaped steel.

  In the present embodiment, the upper and lower fitting members 15 and the connecting member 13 are connected. For example, the fitting member 15 is arranged only in the upper stage, and the fitting member 15 and the connecting member 13 are connected to each other. It is also possible to connect. In this case, it is possible to connect the fitting member 15 and the connecting member 13 by passing a bolt through the bolt hole 21 of the fitting member 15 and tightening the bolt hole (not shown) provided in the connecting member 13. The notch may be provided only in the lower flange 3a of the upper laminated rubber 1a.

  As described above, various methods for connecting the fitting member and the connecting member can be considered. Hereinafter, these examples will be described as second to fourth embodiments.

[Second Embodiment]
FIG. 6A is an elevation view of the seismic isolation device 37 according to the second embodiment.
As shown in FIG. 6 (a), the seismic isolation device 37 is the first implementation in that the upper laminated rubber 1a and the lower laminated rubber 1b are arranged in a staggered manner on the upper and lower stages of the connecting member 13. Different from form. The same components as those described in the first embodiment are denoted by the same reference numerals in the drawings and the description thereof is omitted.

  The upper and lower laminated rubbers 1a and 1b are arranged so that the cutout portions 9a and the cutout portions 9b face each other, and the fitting material 15 is fitted between the cutout portions 9a and the cutout portions 9b facing each other. The However, in the second embodiment, the planar position of the fitting material 15 differs vertically.

The upper fitting material 15 and the connecting member 13 use a connecting jig 41 that is a headed bolt, and the fitting hole of the fitting material 15 (see FIG. 1C) and the fitting material for the connecting member 13 The bolt holes (not shown) are aligned, and the connection is made by inserting and tightening the connecting jig 41 from the fitting material 15 side.
The lower fitting material 15 and the connecting member 13 are connected in the same manner.

In the second embodiment, the same effect as in the first embodiment can be obtained.
Thus, the position of the laminated rubber is not limited to the one corresponding to the top and bottom. Furthermore, the number of connecting steps of the laminated rubber in the seismic isolation device, the number and arrangement pattern of the laminated rubber arranged in the same step, and the like can be variously determined.

[Third Embodiment]
FIG. 6B is an elevation view of the seismic isolation device 43 according to the third embodiment.
As shown in FIG. 6B, the seismic isolation device 43 is different from the first embodiment in that the flange of the laminated rubber is cut out in a step shape. The same components as those described in the first embodiment are denoted by the same reference numerals in the drawings and the description thereof is omitted.

In the seismic isolation device 43, the outer edge portion 7a of the lower flange 3a of the upper laminated rubber 1a is notched in a step shape so as to widen the section in the flange height direction on the connecting member 13 side, thereby forming a notch portion 9c. The outer edge portion 7b of the upper flange 5b of the lower laminated rubber 1b is also notched in a step shape so as to widen the cross section in the flange height direction on the connecting member 13 side, thereby forming a notched portion 9d.
Furthermore, the fitting member 15a has a convex cross section in which two adjacent corners of a quadrangle are cut out in a step shape in accordance with the stepped cutout portions 9c and 9d as described above.

  In the seismic isolation device 43, similarly to the seismic isolation device 2 of the first embodiment, the upper laminated rubber 1a is arranged so that the notch portions 9c face each other. Similarly, the lower laminated rubber 1b is arranged so that the notches 9d face each other. Between the notch parts 9c which the upper laminated rubber 1a opposes, it arrange | positions so that the fitting material 15a may fit. Similarly, the fitting material 15a is also disposed between the opposing cutout portions 9d of the lower laminated rubber 1b. Similarly to the first embodiment, the upper and lower fitting materials 15a and the connecting member are arranged. 13 are connected by a connecting jig 31.

In the third embodiment, the same effect as in the first embodiment can be obtained.
Thus, if the notch is formed by notching so that the cross-section of the flange is widened on the connecting member side, the fitting material fitted between the notch and the flange mesh with each other, and the stress of the connecting member Can be suitably transmitted to the flange via the fitting material.

[Fourth Embodiment]
FIG. 6C is an elevation view of the seismic isolation device 45 according to the fourth embodiment.
As shown in FIG.6 (c), the seismic isolation apparatus 45 differs from 1st Embodiment by the point which does not cut out the flange of laminated rubber. The same components as those described in the first embodiment are denoted by the same reference numerals in the drawings and the description thereof is omitted.

In the seismic isolation device 45, the fitting material 15b is arranged so as to be fitted between the opposed lower flanges 3a of the laminated rubber 1a arranged adjacent to each other in the upper stage. Similarly, in the lower stage, the fitting member 15b is arranged so as to fit between the opposed upper flanges 5b of the laminated rubber 1b arranged adjacent to each other.
The fitting member 15b has a convex cross section in which two adjacent corners of a quadrangle are cut out in a step shape so as to fit between these opposing flanges. However, it is connected using the connecting jig 31 as in the first embodiment.

In the fourth embodiment, the same effect as in the first embodiment can be obtained.
Thus, it is also possible to configure the seismic isolation device by disposing the fitting material between the flanges while omitting the notch of the flange. Even in this case, the stress of the connecting member can be transmitted to the flange via the fitting material.

  Further, in the above example, the laminated rubber is used as a seismic isolation member, and a multi-stage seismic isolation device has been described, but other seismic isolation members having a seismic isolation function instead of laminated rubber, such as rolling bearings, etc. It is also possible to use.

  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.

1a, 1b ......... Laminated rubber 2,37,43,45 ......... Seismic isolation device 3a, 3b ......... Lower flange 5a, 5b ......... Upper flange 7a, 7b ......... Outer edge 9a, 9b, 9c , 9d ......... Notch 13, 13a ......... Connecting member 15, 15a, 15b ......... Fitting material 31, 33, 41 ......... Connecting jig

Claims (4)

A seismic isolation device in which a plurality of seismic isolation members with flanges attached to the top and bottom are arranged on each stage, and the upper and lower seismic isolation members are connected up and down via a coupling member,
In at least one of the upper stage and the lower stage, a fitting material that fits between the flange parts on the side of the connecting member facing the adjacent seismic isolation members is disposed,
A seismic isolation device, wherein the fitting member and the connecting member are connected.   A flange portion on the side of the connecting member facing the adjacent seismic isolation member is provided with a notched portion that is notched so that the connecting member side is widened, and the fitting material is fitted between the notched portions. The seismic isolation device according to claim 1, wherein the seismic isolation device is arranged.   The seismic isolation device according to claim 2, wherein the cutout portion is a cutout portion of the flange portion in an oblique direction. The upper and lower seismic isolation member, arranged so as to face all the upper and lower positions,
In both the upper stage and the lower stage, a fitting material that fits between the flange parts on the side of the connecting member facing the adjacent seismic isolation members is arranged,
The seismic isolation device according to any one of claims 1 to 3, wherein the upper and lower fitting members are connected to the connecting member.

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