JP2024004166A - Device and method for restraining horizontal deformation of base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for restraining horizontal deformation of a base isolation device which is simple and inexpensive.

SOLUTION: A device 100 for restraining horizontal deformation of a base isolation device 16 provided at a base isolation layer 14 between an upper structure 10 and a lower structure 12 for constituting a skeleton of a base isolation building, and includes a restraining material 18 which is provided at the base isolation layer 14 outside of the base isolation device 16 so as to restrain the horizontal deformation of the base isolation device 16, and connects the upper structure 10 and the lower structure 12 in an oblique direction.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a horizontal displacement restraining device and method for a seismic isolation device that restrains the seismic isolation rubber of the seismic isolation device from being deformed in the horizontal direction when constructing a seismic isolation building.

Conventionally, seismic isolation buildings equipped with seismic isolation devices are known (for example, see Patent Document 1). When constructing such seismic isolation buildings, the seismic isolation rubber of the seismic isolation device may be restrained in the horizontal direction to prevent it from deforming. By doing this, safety can be ensured during construction. Further, when the upper beam of the seismic isolation device is a steel beam, deformation of the seismic isolation rubber caused by thermal contraction due to welding of the steel frame can be restrained.

Special Publication No. 2021-532294

The present inventor conducted extensive research in order to develop a simple and inexpensive horizontal deformation restraint device. As a result, we have achieved the following invention that utilizes the frame of a seismically isolated building.

The present invention has been made in view of the above, and an object of the present invention is to provide a simple and inexpensive horizontal deformation restraint device and method for a seismic isolation device.

In order to solve the above-mentioned problems and achieve the purpose, the horizontal deformation restraint device of the seismic isolation device according to the present invention is applied to the seismic isolation layer between the upper structure and the lower structure that constitute the frame of the seismically isolated building. A device for restraining horizontal deformation of a seismic isolation device provided, the device being provided on the seismic isolation layer outside the seismic isolation device in order to restrain horizontal deformation of the seismic isolation device; The present invention is characterized by comprising a restraining member that diagonally connects the upper structure and the lower structure.

Further, in the horizontal deformation restraining device of another seismic isolation device according to the present invention, in the above-described invention, the restraining material is arranged in an oblique direction so as to approach the seismic isolation device from top to bottom, and The upper end of the restraining material is fixed to a steel mold provided on the upper structure via a mounting hardware, and the lower end of the restraining material is fixed to the intersection of the upper surface and side surface of the lower structure via a cushioning material. It is characterized by

Furthermore, the method for restraining horizontal deformation of a seismic isolation device according to the present invention restrains the horizontal deformation of a seismic isolation device provided in a seismic isolation layer between an upper structure and a lower structure that constitute the frame of a seismically isolated building. A method for connecting the upper structure and the lower structure in a diagonal direction to the base isolation layer outside the base isolation device in order to restrain horizontal deformation of the base isolation device. The feature is that a restraining material is provided.

Further, in another method for restraining horizontal deformation of a seismic isolation device according to the present invention, in the above-described invention, the restraining material is arranged in a diagonal direction so as to approach the seismic isolation device from top to bottom, and The upper end of the restraining material is fixed to a steel mold provided on the upper structure via a mounting hardware, and the lower end of the restraining material is fixed to the intersection of the upper surface and side surface of the lower structure via a cushioning material. It is characterized by

According to the horizontal deformation restraint device for a seismic isolation device according to the present invention, horizontal deformation of the seismic isolation device provided in the seismic isolation layer between the upper structure and the lower structure that constitute the frame of a seismically isolated building is restrained. The device is provided in the seismic isolation layer outside the seismic isolation device in order to restrain horizontal deformation of the seismic isolation device, and is provided on the seismic isolation layer outside the seismic isolation device to restrain the deformation of the seismic isolation device in the horizontal direction. Since the restraining member connected to the base isolation device is provided, it is possible to provide a simple and inexpensive horizontal deformation restraining device for the seismic isolation device.

Further, according to another horizontal deformation restraint device of a seismic isolation device according to the present invention, the restraint member is arranged in an oblique direction so as to approach the base isolation device from top to bottom, and the upper end of the restraint member is fixed to a steel mold provided on the upper structure via attachment hardware, and the lower end of the restraint member is fixed to the intersection of the upper surface and the side surface of the lower structure via a cushioning material, so that the restraint This has the effect that the material can be easily attached and that sufficient restraining force can be exerted.

Further, according to the method for restraining horizontal deformation of a seismic isolation device according to the present invention, horizontal deformation of a seismic isolation device provided in a seismic isolation layer between an upper structure and a lower structure that constitute the frame of a seismically isolated building is achieved. In order to restrain horizontal deformation of the seismic isolation device, the upper structure and the lower structure are attached to the seismic isolation layer outside the seismic isolation device in an oblique direction. Since the restraining member connected to the base isolation device is provided, it is possible to provide a simple and inexpensive horizontal deformation restraining method for the seismic isolation device.

Further, according to another method for restraining horizontal deformation of a seismic isolation device according to the present invention, the restraining material is arranged in an oblique direction so as to approach the seismic isolation device from top to bottom, and the upper end of the restraining material is fixed to a steel mold provided on the upper structure via attachment hardware, and the lower end of the restraint member is fixed to the intersection of the upper surface and the side surface of the lower structure via a cushioning material, so that the restraint This has the effect that the material can be easily attached and that sufficient restraining force can be exerted.

FIG. 1 is a side sectional view showing Embodiment 1 of a horizontal deformation restraining device and method for a seismic isolation device according to the present invention. FIG. 2 is a horizontal sectional view showing Embodiment 1 of the horizontal deformation restraint device and method for a seismic isolation device according to the present invention. FIG. 3 is a side sectional view showing a second embodiment of the horizontal deformation restraint device and method for a seismic isolation device according to the present invention. FIG. 4 is a side sectional view showing Embodiment 3 of the horizontal deformation restraint device and method for a seismic isolation device according to the present invention. FIG. 5 is a side sectional view showing Embodiment 4 of the horizontal deformation restraint device and method for a seismic isolation device according to the present invention. FIG. 6 is an enlarged view of the main part of the third embodiment, in which (1) is a side sectional view and (2) is a cross sectional view. FIG. 7 is an enlarged view of a main part of the fourth embodiment, in which (1) is a side sectional view and (2) is a cross sectional view.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a horizontal deformation restraint device and method for a seismic isolation device according to the present invention will be described in detail below based on the drawings. Note that the present invention is not limited to this embodiment.

(Embodiment 1)
First, Embodiment 1 of the present invention will be described.
As shown in FIGS. 1 and 2, the horizontal deformation restraint device 100 of the seismic isolation device according to the first embodiment is a seismic isolation device between an upper structure 10 and a lower structure 12 that constitute the frame of a seismically isolated building. This is a device for restraining the horizontal deformation of the seismic isolation device 16 provided in the layer 14, and is a device for restraining the horizontal deformation of the seismic isolation device 16. A restraining member 18 is provided and connects the upper structure 10 and the lower structure 12 in a diagonal direction.

The upper structure 10 includes a joint member 22 coaxially provided at the lower end of a pillar 20 that is a frame, and beam members 24 fixed to the front, rear, left, and right sides of the joint member 22 with bolts or the like (not shown). has. The joint member 22 is made of a material such as steel or concrete. The beam member 24 is an H-shaped steel having an upper flange 26, a lower flange 28, and a web 30, and as shown in FIG. 2, extends from the joint member 22 in the front, rear, left, and right directions, respectively, when viewed from above.

The lower structure 12 includes a concrete slab 32 and a concrete base 34 provided on the upper surface of the slab 32. The base 34 is for installing the seismic isolation device 16, and as shown in FIG. 2, has a square shape when viewed from above.

The seismic isolation device 16 includes a cylindrical laminated rubber 36 (seismic isolation rubber) in which a plurality of rubber layers and steel plates are alternately laminated in the vertical direction, and circular plates coaxially attached to the upper and lower end surfaces of the laminated rubber 36. 38, 40. The upper end plate 38 is fixed to the lower surface (horizontal surface) of the joint member 22 of the upper structure 10 with an anchor bolt (not shown). The lower end plate 40 is fixed to the upper surface (horizontal surface) of the base 34 of the lower structure 12 with an anchor bolt (not shown).

The restraining members 18 are provided at four locations on the front, rear, left, and right of the base 34, and are composed of wires 18A arranged in the same vertical plane along the extension direction of the beam member 24. This restraining material 18 is a temporary material that is removed after construction is completed (before construction is completed). The wire 18A is stretched diagonally so as to move away from the seismic isolation device 16 from top to bottom. The upper end of the wire 18A is inserted and fixed into an engagement hole 44 of a hook 42 welded to the lower flange 28 of the beam member 24. The lower end of the wire 18A is coupled to an anchor 46 fixed to the upper surface of the slab 32. A lever block (registered trademark) 18B is connected to the wire 18A. By operating this lever block 18B, the tension of the wire 18A can be adjusted. Note that although the illustrated example shows a case where the inclination angle θ of the wire 18A with respect to the horizontal line is 30°, the inclination angle θ can be set as appropriate depending on the installation environment of the seismic isolation device 16 and the like. Further, in the illustrated example, the wires 18A are provided at four locations on the front, rear, left, and right sides of the base 34, but the number of wires 18A is not limited to this, and may be provided at any number of locations. For example, if the degree of restriction per location is increased, the number of installation locations can be reduced.

The operation and effect of the above configuration will be explained.
First, the upper structure 10 and the lower structure 12 are constructed, the hanging pieces 42 and the anchors 46 are installed, and the wire 18A of the restraint member 18 is temporarily installed between the hanging pieces 42 and the anchors 46. Subsequently, the seismic isolation device 16 is installed between the base 34 and the joint member 22. Thereafter, welding work for the beam members 24 and the like is performed in order to construct the incidental equipment. At this time, the tension of the wire 18A is adjusted using the lever block 18B, and the rubber lamination 36 of the seismic isolation device 16 is restrained in the horizontal direction so that the rubber lamination 36 is not deformed. This makes it possible to ensure work safety during construction. Moreover, deformation of the laminated rubber 36 caused by thermal contraction accompanying welding of the beam member 24 can be restrained. After all construction is completed, the restraining material 18, the hanging piece 42, and the anchor 46 are removed and removed. To simplify the work, the hooking pieces 42 and anchors 46 may be left as they are.

According to the first embodiment, the restraint material 18 can exert sufficient restraint force, and can reliably restrain the deformation of the laminated rubber 36. Moreover, it can be manufactured at low cost and can be reused. At the site, only the installation and removal of the restraining material 18 is required, so there is little impact on the main construction process. Since construction accuracy is not required, work is easy and work safety is high. Furthermore, it is environmentally friendly as it produces almost no waste material. According to the first embodiment, a simple and inexpensive horizontal deformation restraint device can be provided.

(Embodiment 2)
Next, a second embodiment of the present invention will be described.
As shown in FIG. 3, in the horizontal deformation restraint device 200 of the seismic isolation device according to the second embodiment, in the above-described first embodiment, the direction of the restraint material 18 is changed from the top to the bottom of the seismic isolation device 16. It is arranged diagonally so that it approaches .

The restraining members 18 are provided at four locations on the front, rear, left, and right of the base 34, and are made of L-shaped steel arranged in the same vertical plane along the extension direction of the beam member 24. This restraining material 18 is a temporary material that is removed after construction is completed (before construction is completed). Note that the restraining material of the present invention is not limited to L-beam steel, and may be a member having a different cross-sectional shape as long as it has high rigidity and yield strength. Further, although the illustrated example shows a case where the inclination angle θ of the restraint material 18 with respect to the horizontal line is 30°, the inclination angle θ can be set as appropriate depending on the installation environment of the seismic isolation device 16 and the like. Further, in the illustrated example, the restraining members 18 are provided at four locations on the front, rear, left, and right sides of the base 34, but the number of restraining members 18 to be provided is not limited to this, and may be provided at any number of locations. For example, if the degree of restriction per location is increased, the number of installation locations can be reduced.

The upper end portion of the restraint member 18 is detachably attached to a plate 50 protruding from the center of the lower surface of the lower flange 28 of the beam member 24 using a mounting hardware 48 such as a bullman. The plate 50 can be an L-shaped steel plate attached over the entire length of the beam member 24 for equipment attachment.

The lower end of the restraining material 18 is fixed to the intersection 52 between the upper surface of the slab 32 and each side surface of the base 34 via a cushioning material 54. Specifically, a steel material 56 having an L-shaped cross section is welded to the lower end of the restraining member 18. This steel material 56 is closely arranged at the L-shaped intersection 52 when viewed from the side, with the cushioning material 54 interposed therebetween. The lower end of the restraining member 18 is arranged at the center of each side of the square base 34 in plan view with respect to the intersection 52. The cushioning material 54 may be any material as long as it brings the steel material 56 into close contact with the intersection 52. For example, a rubber sheet, a cement-based non-shrinking mortar, a mortar bag filled with cement-based non-shrinking mortar, etc. can be used. A rubber sheet is preferable in consideration of ease of installation and removal.

The operation and effect of the above configuration will be explained.
First, the upper structure 10 and the lower structure 12 are constructed, and the plate 50 is attached to the upper structure 10. Subsequently, the upper end of the restraint member 18 is fixed to the plate 50 with a mounting hardware 48 such as a bullman, and the steel material 56 at the lower end of the restraint member 18 is placed in close contact with the buffer material 54 provided at the intersection 52 of the base 34. do. Subsequently, the seismic isolation device 16 is installed between the base 34 and the joint member 22. Thereafter, welding work for the beam members 24 and the like is performed in order to construct the incidental equipment. Through the axial force of the restraining member 18, the laminated rubber 36 of the seismic isolation device 16 is restrained in the horizontal direction so as not to be deformed. This makes it possible to ensure work safety during construction. Moreover, deformation of the laminated rubber 36 caused by thermal contraction accompanying welding of the beam member 24 can be restrained. After all construction is completed, the restraining material 18, the mounting hardware 48, and the cushioning material 54 are removed and removed.

According to the second embodiment, the restraint material 18 can exert sufficient restraint force, and can reliably restrain the deformation of the laminated rubber 36. Moreover, it can be manufactured at low cost and can be reused. At the site, only the installation and removal of the restraining material 18 is required, so there is little impact on the main construction process. Since construction accuracy is not required, work is easy and work safety is high. In particular, compared to Embodiment 1, the restraining material 18 can be easily attached in a short time, and there is no need for frame work such as anchor bolt work, so that work efficiency can be further improved. Furthermore, it is environmentally friendly as it produces almost no waste material. According to the second embodiment, a simple and inexpensive horizontal deformation restraint device can be provided.

(Embodiment 3)
Next, a third embodiment of the present invention will be described.
As shown in FIG. 4, the horizontal deformation restraint device 300 of the seismic isolation device according to the third embodiment corresponds to the case where the plate 50 under the lower flange 28 of the beam member 24 is not provided in the second embodiment described above. It is something to do. Specifically, the gusset plate 58 is attached to the lower flange 28 in advance at a processing factory, and the gusset plate 58 and the restraint member 18 are connected using the mounting hardware 48 at the construction site. Even in this manner, it is possible to provide a simple and inexpensive horizontal deformation restraint device.

In the construction procedure of the third embodiment, for example, the gusset plate 58 is welded to the lower flange 28 in advance at a location other than the construction location (for example, in a processing factory such as an ironworks or a workplace on-site). The gusset plate 58 is welded perpendicularly to the lower surface of the lower flange 28 so as to extend downward from the lower surface of the lower flange 28, as shown in FIG. The beam member 24 after welding in this manner is carried to the construction site. Subsequently, the gusset plate 58 and the restraining member 18 are fixed with the mounting hardware 48 at the construction site. Note that the present invention is not limited to this, and instead of the gusset plate 58, a member such as an angle may be welded to the lower flange 28, and this member and the restraining member 18 may be connected with the mounting hardware 48 at the construction site. It may be fixed. Further, the connection between the restraining member 18 and the gusset plate 58 is not limited to the attachment hardware 48, and may be welded or bolted.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described.
As shown in FIG. 5, a horizontal deformation restraining device 400 of a seismic isolation device according to the fourth embodiment corresponds to the case where the gusset plate 58 cannot be attached to the lower flange 28 in the third embodiment described above. It is. Specifically, the restraining material 18 is joined to the lower flange 28 via a splint 60 such as a plate at the construction site. In this case, for example, as shown in FIG. 7, a splice plate 60 is placed in contact with the lower surface of the lower flange 28, and the lower flange 28 and the splice plate 60 are fixed with a fitting 48 such as a bullman. Even in this manner, it is possible to provide a simple and inexpensive horizontal deformation restraint device.

In the construction procedure of the fourth embodiment, for example, the end portion of the restraining material 18 and the splice plate 60 are welded in advance at a location other than the construction location (for example, in a factory such as an ironworks, a workplace on site, etc.). The restraining material 18 after welding the splint 60 in this manner is carried to the construction site. Subsequently, at the construction site, the splice plate 60 is placed in contact with the lower surface of the lower flange 28, and then the splice plate 60 and the lower flange 28 are connected and fixed using the mounting hardware 48. Note that the present invention is not limited to this, and after joining the splint 60 and the lower surface of the lower flange 28 in advance at a location other than the construction site using the mounting hardware 48 or welding, the beam member 24 is transported to the construction site, and the beam member 24 is transported to the construction site. The splice plate 60 and the restraint member 18 may be welded together.

As explained above, according to the horizontal deformation restraint device for a seismic isolation device according to the present invention, the seismic isolation device provided in the seismic isolation layer between the upper structure and the lower structure that constitute the frame of a seismically isolated building. A device for restraining horizontal deformation, the device being provided on the base isolation layer outside the base isolation device in order to restrain horizontal deformation of the base isolation device, and comprising: Since the restraining member diagonally connects to the structure, it is possible to provide a simple and inexpensive horizontal deformation restraint device for the seismic isolation device.

Further, according to another horizontal deformation restraint device of a seismic isolation device according to the present invention, the restraint member is arranged in an oblique direction so as to approach the base isolation device from top to bottom, and the upper end of the restraint member is fixed to a steel mold provided on the upper structure via attachment hardware, and the lower end of the restraint member is fixed to the intersection of the upper surface and the side surface of the lower structure via a cushioning material, so that the restraint Materials can be easily attached and sufficient binding force can be exerted.

Further, according to the method for restraining horizontal deformation of a seismic isolation device according to the present invention, horizontal deformation of a seismic isolation device provided in a seismic isolation layer between an upper structure and a lower structure that constitute the frame of a seismically isolated building is achieved. In order to restrain horizontal deformation of the seismic isolation device, the upper structure and the lower structure are attached to the seismic isolation layer outside the seismic isolation device in an oblique direction. Since a restraining member connected to the base isolation device is provided, it is possible to provide a simple and inexpensive method for restraining horizontal deformation of a seismic isolation device.

Further, according to another method for restraining horizontal deformation of a seismic isolation device according to the present invention, the restraining material is arranged in an oblique direction so as to approach the seismic isolation device from top to bottom, and the upper end of the restraining material is fixed to a steel mold provided on the upper structure via attachment hardware, and the lower end of the restraint member is fixed to the intersection of the upper surface and the side surface of the lower structure via a cushioning material, so that the restraint Materials can be easily attached and sufficient binding force can be exerted.

As described above, the device and method for restraining horizontal deformation of a seismic isolation device according to the present invention are useful for restraining the seismic isolation rubber of a seismic isolation device from deforming in the horizontal direction when constructing a seismic isolation building. It is particularly suitable for simple and inexpensive implementation.

10 Upper structure 12 Lower structure 14 Seismic isolation layer 16 Seismic isolation device 18 Restraint material 18A Wire 18B Lever block 20 Column 22 Joint member 24 Beam member 26 Upper flange 28 Lower flange 30 Web 32 Slab 34 Base 36 Laminated rubber 38 , 40, 50 Plate 42 Latching piece 44 Engagement hole 46 Anchor 48 Mounting hardware 52 Intersection 54 Cushioning material 56 Steel material 58 Gusset plate 100-400 Horizontal deformation restraint device for seismic isolation device

Claims (4)

A device for restraining horizontal deformation of a seismic isolation device provided in a seismic isolation layer between an upper structure and a lower structure that constitute the frame of a seismically isolated building,
A restraining member is provided on the base isolation layer outside the base isolation device to restrain horizontal deformation of the base isolation device, and connects the upper structure and the lower structure in a diagonal direction. Horizontal deformation restraint device for seismic isolation device characterized by: The restraint member is arranged in a diagonal direction so as to approach the seismic isolation device from top to bottom, and the upper end of the restraint member is fixed to a steel mold provided in the upper structure via a mounting hardware, The horizontal deformation restraint device for a seismic isolation device according to claim 1, wherein a lower end of the restraint member is fixed to an intersection between an upper surface and a side surface of the lower structure via a buffer material. A method for restraining horizontal deformation of a seismic isolation device provided in a seismic isolation layer between an upper structure and a lower structure constituting the frame of a seismically isolated building, the method comprising:
In order to restrain horizontal deformation of the seismic isolation device, the seismic isolation layer outside the seismic isolation device is provided with a restraining member that connects the upper structure and the lower structure in an oblique direction. A horizontal deformation restraint method for a seismic isolation device. The restraint member is arranged in a diagonal direction so as to approach the seismic isolation device from top to bottom, and the upper end of the restraint member is fixed to a steel mold provided in the upper structure via a mounting hardware, 4. The method for restraining horizontal deformation of a seismic isolation device according to claim 3, wherein a lower end of the restraint member is fixed to an intersection between an upper surface and a side surface of the lower structure via a buffer material.

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