JP6557033B2 - Bearing structure - Google Patents

Description

  The present invention relates to a support structure.

  Conventionally, a support structure described in Patent Document 1 below is known. This support structure is disposed between an upper structure and a lower structure, and includes a laminate in which rigid plates and elastic plates are alternately laminated, an upper structure or a lower structure, and a laminate. And a pair of flange plates that are interposed between each other and fixed to the laminate, and whose outer peripheral portion protrudes outward in the radial direction of the laminate from the laminate. Each of the pair of flange plates is a movable flange plate arranged to be movable with respect to the upper structure or the lower structure on which the flange plate is arranged. In this support structure, the movable flange plate is fixed to the upper structure or the lower structure via a frame fitting.

JP-A-6-272217

  However, in the conventional bearing structure, since the vertical displacement of the movable flange plate is restricted by the frame bracket, the upper structure and the lower structure, for example, the upper structure (building body) is lifted when an earthquake occurs. When the body is about to be displaced relatively in the vertical direction, vertical tensile stress acts on the laminate. Therefore, when the upper structure and the lower structure are to be displaced relatively greatly in the vertical direction, the stacked body may be damaged and the function of the stacked body may be impaired.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to suppress damage to a stacked body when an upper structure and a lower structure are to be displaced relatively in the vertical direction. .

In order to solve the above problems, the present invention proposes the following means.
The support structure according to the present invention is disposed between an upper structure and a lower structure, and a laminated body in which rigid plates and elastic plates are alternately laminated, the upper structure or the lower structure, wherein the laminate is fixed to the laminate with interposed individually between, and a pair of flange plate which projects outward in the radial direction of the laminate than the outer peripheral portion is the laminate, the The laminated body and the pair of flange plates support the upper structure so as to be horizontally movable with respect to the lower structure , and at least one of the pair of flange plates is the upper portion on which the flange plate is disposed. A support structure that is a movable flange plate that is movably disposed with respect to the structure or the lower structure, and is fixed to the upper structure or the lower structure on which the movable flange plate is disposed, Movable franc A support member that supports an outer peripheral portion of the plate, and the support member includes a vertical support portion that supports an outer peripheral edge of the movable flange plate, and an inner surface facing the inner side in the vertical direction at the outer peripheral portion of the movable flange plate. It is characterized by non-contact.

In this case, since the support member is not in contact with the inner surface of the outer peripheral portion of the movable flange plate, when the upper structure and the lower structure are relatively displaced in the vertical direction, the movable flange plate is moved to the movable flange plate. The board can be separated from the upper structure or the lower structure. Therefore, it becomes possible to suppress that a big tensile stress acts on a laminated body, and damage to a laminated body can be suppressed.
In addition, since the support member has a vertical support portion, when the movable flange plate is separated from the upper structure or the lower structure, the vertical support portion can suppress the displacement of the movable flange plate in the horizontal direction. Thus, an unexpected displacement of the laminate in the horizontal direction can be restricted.

The support member includes a lateral support portion that protrudes inward in the radial direction from the longitudinal support portion, and is disposed with a vertical clearance between the inner surface of the outer peripheral portion of the movable flange plate , The vertical support part and the horizontal support part may be integrally formed .

  In this case, the support member includes a lateral support portion that is disposed with a gap in the vertical direction between the inner surface of the outer peripheral portion of the movable flange plate. Therefore, for example, when the upper structure and the lower structure are to be displaced relatively small in the vertical direction, the gap between the movable flange plate and the lateral support portion is utilized to The movable flange plate can be moved within a range where the support portion does not engage, and the movable flange plate can be allowed to move in the vertical direction. In addition, for example, when the upper structure and the lower structure are to be largely displaced, the movable flange plate is engaged with the lateral support portion to restrict further movement of the movable flange plate in the vertical direction. be able to. Thus, for example, when the upper structure and the lower structure are to be relatively displaced in the vertical range within the assumed range, the upper structure is allowed while allowing the movable flange plate to move in the vertical direction. When the movable body and the lower structure are to be displaced relatively large in the vertical direction unexpectedly, further movement of the movable flange plate in the vertical direction can be restricted. As a result, it is possible to reliably regulate unexpected displacement of the laminate while suppressing damage to the laminate.

After the upper structure and the lower structure are relatively displaced in the vertical direction and the outer peripheral portion of the movable flange plate and the lateral support portion are engaged in the vertical direction, the upper structure and the lower structure When a vertical tensile stress is applied to the laminate with further vertical displacement relative to the body, the support is applied before the tensile stress reaches the tensile yield stress of the laminate. The member may be destroyed.
The support member includes a fixing portion that fixes the vertical support portion to the upper structure or the lower structure, and the fixing portion is formed by a bolt, and includes an outer peripheral portion of the movable flange plate, the lateral support portion, and the like. After engaging in the vertical direction, before the tensile stress reaches the tensile yield stress of the laminate, the head of the bolt may be separated from the bolt shaft portion, so that the support member may be destroyed.

  In this case, after the upper structure and the lower structure are relatively displaced in the vertical direction and the outer peripheral portion of the movable flange plate and the lateral support portion are engaged in the vertical direction, the upper structure and the lower structure When a vertical tensile stress acts on the laminate with further vertical displacement, the support member is destroyed before the tensile stress reaches the tensile yield stress of the laminate. Therefore, for example, when the upper structure and the lower structure are about to be displaced relatively large in the vertical direction unexpectedly, and the tensile stress tries to reach the tensile yield stress of the laminate, the support member Is destroyed, and it is possible to suppress the damage of the laminate by suppressing the tensile stress having the magnitude corresponding to the tensile yield stress from acting on the laminate. At this time, since the support member is destroyed, it is possible to easily determine from the appearance whether or not the member needs to be replaced.

  ADVANTAGE OF THE INVENTION According to this invention, when an upper structure and a lower structure are going to displace relatively to a perpendicular direction, damage to a laminated body can be suppressed.

It is a longitudinal section of the support structure shown as one embodiment concerning the present invention. It is an enlarged view of the principal part of the support structure shown in FIG.

Hereinafter, with reference to FIG. 1 and FIG. 2, the support structure 10 which concerns on one Embodiment of this invention is demonstrated.
As shown in FIG. 1, the support structure 10 is disposed between an upper structure S1 such as a building body and a lower structure S2 such as a foundation so that the upper structure S1 is horizontal with respect to the lower structure S2. Support in a movable manner. In the illustrated example, a base plate B is provided on the upper portion of the lower structure S2, and the support structure 10 is disposed on the base plate B.

The support structure 10 includes a laminated body 11, a pair of flange plates 12, and a support member 13.
Here, the laminate 11 is formed in a columnar shape, the flange plate 12 is formed in a disc shape, and the central axis of the laminate 11 and the pair of flange plates 12 is located on a common axis extending in the vertical direction. . Hereinafter, this common axis is referred to as an axis O, and in a plan view of the support structure 10 viewed from the vertical direction, a direction orthogonal to the axis O is referred to as a radial direction (a radial direction of the laminated body 11). The direction to do is called the circumferential direction.

  The stacked body 11 is disposed between the upper structure S1 and the lower structure S2. The laminate 11 is formed by alternately laminating rigid plates 14 and elastic plates 15 and can be shear-deformed in the horizontal direction. The rigid plate 14 is made of, for example, a metal material or a hard resin material. The elastic plate 15 is formed of, for example, rubber or other soft resin material, and is vulcanized and bonded to the rigid plate 14.

  The pair of flange plates 12 are interposed between the upper structure S <b> 1 or the lower structure S <b> 2 and the stacked body 11 and are fixed to the stacked body 11. The outer peripheral portion of the flange plate 12 protrudes outward in the radial direction from the laminated body 11. The flange plate 12 is made of, for example, a metal material or a hard resin material.

  At least one of the pair of flange plates 12 is a movable flange plate 16 disposed so as to be movable with respect to the upper structure S1 or the lower structure S2 where the flange plate 12 is disposed. In the present embodiment, of the pair of flange plates 12, the lower flange plate 12a located on the lower side is the movable flange plate 16, and the upper flange plate 12b located on the upper side is fixed to the upper structure S1. The flange plate 17 is used.

  The support member 13 is fixed to the lower structure S2 and supports the outer peripheral portion of the lower flange plate 12a. The support member 13 is fitted to the lower flange plate 12a from the outside in the radial direction, and the lower flange plate 12a is fitted to the support member 13 so as to be slidable in the vertical direction. The support member 13 can be arranged continuously over the entire circumference in the circumferential direction, or can be arranged intermittently. When arrange | positioning the support member 13 continuously over the perimeter of the circumferential direction, in order to ensure workability | operativity, it is preferable to divide the support member 13 into several division body in the circumferential direction.

  The support member 13 includes a vertical support portion 18 that supports the outer peripheral edge of the movable flange plate 16, a horizontal support portion 19 that protrudes radially inward from the vertical support portion 18, and the vertical support portion 18 as a lower structure S2. And a fixing portion 20 to be fixed to. The vertical support portion 18 and the horizontal support portion 19 are integrally formed of, for example, a metal material or a hard resin material. The vertical support portion 18 and the horizontal support portion 19 constitute a main body portion 21 of the support member 13. The fixing portion 20 is formed of a bolt, and is screwed into an internal thread portion formed in the base plate B through an insertion hole formed in the vertical support portion 18, thereby attaching the vertical support portion 18 (main body portion 21). It is fixed to the base plate B (lower structure S2).

  As shown in FIG. 2, the support member 13 is not in contact with the inner surface 22 facing the upper side (inner side in the vertical direction) in the outer peripheral portion of the lower flange plate 12a. In the present embodiment, a vertical gap G is provided between the lateral support portion 19 and the inner surface 22 of the outer peripheral portion of the lower flange plate 12a. The size of the gap G in the vertical direction can be set based on, for example, a three-dimensional solid analysis of the entire structure including the upper structure S1, the lower structure S2, and the support structure 10, and the above-described third order For example, the maximum lifting amount of the upper structure S1 at the position obtained by the original three-dimensional analysis can be set.

  Next, the operation of the support structure 10 will be described.

  For example, when an earthquake or the like occurs and the upper structure S1 and the lower structure S2 are relatively displaced in the vertical direction, the stacked body 11 and the pair of flange plates 12 are displaced following the upper structure S1 and The flange plate 12 a is separated from the lower structure S <b> 2 while the displacement in the horizontal direction is suppressed by the vertical support portion 18. At this time, when the upper structure S1 and the lower structure S2 are relatively displaced in the vertical range within an assumed range, and the relative displacement between the upper structure S1 and the lower structure S2 is small, The lower flange plate 12a moves within a range in which the lower flange plate 12a and the lateral support portion 19 are not engaged, and movement of the lower flange plate 12a in the vertical direction is allowed. On the other hand, at this time, when the upper structure S1 and the lower structure S2 are about to be relatively displaced in the vertical direction unexpectedly, the lower flange plate 12a engages with the lateral support portion 19, and the lower flange plate Further movement of 12a in the vertical direction is restricted. As a result, the upward movement of the laminate 11 is also restricted, and a vertical tensile stress acts on the laminate 11.

  Here, in the support structure 10, as described above, when the tensile stress in the vertical direction acts on the laminate 11, the support is performed before the tensile stress reaches the tensile yield stress (tensile limit strength) of the laminate 11. The member 13 is destroyed, and the restriction of the movement of the lower flange plate 12a by the support member 13 is released. At this time, the fixing between the pair of flange plates 12 and the laminate 11 and the fixing between the upper structure S1 and the upper flange plate 12b are maintained.

In addition, the tensile yield stress of the laminated body 11 can be prescribed | regulated based on JISK6410-1: 2011, JISK6410-2: 2011, JISK6411: 2012 etc., for example. Further, instead of the reference that the tensile stress reaches the tensile yield stress of the laminate 11, the support member 13 is destroyed before the tensile stress reaches 1 N / mm ² (1 MPa) (tensile limit strength). It is also possible to configure such that.
Further, as a form of destruction of the support member 13, a form of destruction in which the restriction of the movement of the lower flange plate 12a in the vertical direction by the support member 13 is released can be appropriately adopted. For example, the lateral support portion 19 may be plastically deformed upward, the screwing between the fixing portion 20 and the base plate B may be released, or the bolt head of the fixing portion 20 may be separated from the bolt shaft portion. Good.

As described above, according to the support structure 10 according to the present embodiment, since the support member 13 is not in contact with the inner surface 22 of the outer peripheral portion of the lower flange plate 12a, the upper structure S1 and the lower structure S2 are vertical. When trying to displace relatively in the direction, the lower flange plate 12a can be separated from the lower structure S2. Therefore, it becomes possible to suppress a large tensile stress from acting on the laminated body 11, and damage to the laminated body 11 can be suppressed.
In addition, since the support member 13 includes the vertical support portion 18, when the lower flange plate 12a is separated from the lower structure S2, the vertical support portion 18 can suppress the horizontal displacement of the lower flange plate 12a. It becomes possible, and the unexpected displacement to the horizontal direction of the laminated body 11 can be controlled.

  Further, the support member 13 includes a lateral support portion 19 arranged with a vertical gap G between the lower flange plate 12a and the inner surface 22 of the outer peripheral portion. Therefore, for example, when the upper structure S1 and the lower structure S2 are to be displaced relatively small in the vertical direction, the gap G between the lower flange plate 12a and the lateral support portion 19 is used, The lower flange plate 12a can be moved within a range in which the lower flange plate 12a and the lateral support portion 19 are not engaged, and the lower flange plate 12a can be allowed to move in the vertical direction. In addition, for example, when the upper structure S1 and the lower structure S2 are to be largely displaced, the lower flange plate 12a is engaged with the lateral support portion 19 and the lower flange plate 12a is further moved in the vertical direction. Can be restricted. Thereby, for example, when the upper structure S1 and the lower structure S2 are to be relatively displaced in the vertical range within an assumed range, while allowing the lower flange plate 12a to move in the vertical direction, When the upper structure S1 and the lower structure S2 tend to be relatively displaced in the vertical direction unexpectedly, further movement of the lower flange plate 12a in the vertical direction can be restricted. As a result, it is possible to reliably regulate unexpected displacement of the stacked body 11 while suppressing damage to the stacked body 11.

  Further, after the upper structure S1 and the lower structure S2 are relatively displaced in the vertical direction and the outer peripheral portion of the lower flange plate 12a and the lateral support portion 19 are engaged in the vertical direction, the upper structure S1 and the lower structure S1 When a vertical tensile stress acts on the laminated body 11 along with a further relative displacement in the vertical direction with the structure S2, before the tensile stress reaches the tensile yield stress of the laminated body 11, The support member 13 is destroyed. Therefore, for example, when the upper structure S1 and the lower structure S2 are about to be relatively displaced unexpectedly in the vertical direction, and the tensile stress is about to reach the tensile yield stress of the laminate 11. The support member 13 is destroyed, and the laminate 11 can be prevented from being damaged by a tensile stress having a magnitude corresponding to the tensile yield stress. At this time, since the support member 13 is destroyed, the necessity of replacement of the member can be easily determined from the appearance.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

In the first embodiment, the laminate 11 is formed in a columnar shape and the flange plate 12 is formed in a disc shape, but the present invention is not limited to this. The laminated body 11 may be formed in a prismatic shape, and the flange plate 12 may be formed in a polygonal shape in plan view.
In the said embodiment, although the volt | bolt was employ | adopted as the fixing | fixed part 20, this invention is not limited to this. For example, it is possible to employ welding as the fixed portion 20. In this case, the supporting member 13 can be destroyed by destroying the fixing portion 20 (welding) itself.

  The lateral support 19 may not be provided. Further, the vertical support portion 18 may not protrude upward from the lower flange plate 12a.

  In the said embodiment, although the lower flange board 12a was made into the movable flange board 16, this invention is not limited to this. For example, the upper flange plate 12b may be the movable flange plate 16, and the lower flange plate 12a may be the fixed flange plate 17 fixed to the lower structure S2. In this case, the support member 13 can be provided on the upper flange plate 12b. Further, both the upper flange plate 12b and the lower flange plate 12a may be used as the movable flange plate 16. In this case, it is possible to provide support members 13 on both flange plates 12 separately.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 10 Support structure 11 Laminated body 12 Flange board 13 Support member 14 Rigid board 15 Elastic board 16 Movable flange board 18 Vertical support part 19 Horizontal support part 22 Inner surface G Gap S1 Upper structure S2 Lower structure

Claims (4)

A laminated body that is disposed between the upper structure and the lower structure, and in which rigid plates and elastic plates are alternately laminated;
It is interposed between the upper structure or the lower structure and the laminated body and is fixed to the laminated body, and an outer peripheral portion protrudes outward in the radial direction of the laminated body from the laminated body. A pair of flange plates,
The laminate and the pair of flange plates support the upper structure so as to be horizontally movable with respect to the lower structure,
At least one of the pair of flange plates is a support structure that is a movable flange plate that is movably disposed with respect to the upper structure or the lower structure in which the flange plate is disposed,
A support member fixed to the upper structure or the lower structure in which the movable flange plate is disposed, and supporting an outer peripheral portion of the movable flange plate;
The support structure includes a vertical support portion that supports an outer peripheral edge of the movable flange plate, and is non-contact with an inner surface facing the inner side in the vertical direction at the outer peripheral portion of the movable flange plate. The support member includes a lateral support portion that protrudes from the longitudinal support portion toward the inside in the radial direction and is disposed with a vertical gap between the inner surface of the outer peripheral portion of the movable flange plate ,
The support structure according to claim 1, wherein the vertical support portion and the horizontal support portion are integrally formed .   After the upper structure and the lower structure are relatively displaced in the vertical direction and the outer peripheral portion of the movable flange plate and the lateral support portion are engaged in the vertical direction, the upper structure and the lower structure When a vertical tensile stress is applied to the laminate with further vertical displacement relative to the body, the support is applied before the tensile stress reaches the tensile yield stress of the laminate. The bearing structure according to claim 2, wherein the member is broken.   The support member includes a fixing portion that fixes the vertical support portion to the upper structure or the lower structure,
  The fixing portion is formed by a bolt,
  After the outer peripheral portion of the movable flange plate and the lateral support portion are engaged in the vertical direction, the bolt head is separated from the bolt shaft portion before the tensile stress reaches the tensile yield stress of the laminate. The support structure according to claim 3, wherein the support member is broken.

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