JP2002317571A - Shear deformation preventing device for seismic isolator, sliding material, and shear deformation preventing method for seismic isolator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To implement a shear deformation preventing device for a seismic isolator, which prevents shear deformation of the seismic isolator under construction, and prevents application of a horizontal force on the seismic isolator, and to implement a sliding material, and a shear deformation preventing method for the seismic isolator. SOLUTION: According to the shear deformation preventing device, a seismic isolator receiving base plate 10 having a sliding pad 3b stuck to an upper surface thereof is fixed to a foundation 11, and the seismic isolator 2 having a stainless plate 3a attached to a bottom surface of a lower flange 2b is mounted on an upper surface of the sliding pad 3b, followed by fixing the seismic isolator receiving base plate 10 and the lower flange 2b of the seismic isolator 2 to each other by means of a bolt 9. Before a roof pole 1 is mounted on an upper portion of the seismic isolator 2, a finish plate 6a of a hook plate 6 is mounted on an upper surface of a base plate 7a. Further, while a side plate 6b makes contact with peripheral portions of an upper flange 2a and the lower flange 2b, the base plate 7a and the upper flange 2a are clamped together by means of a high tension bolt 8, followed by fixing a deformation preventing/reinforcing means 4 to the seismic isolator 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing shear deformation of a seismic isolation device, which prevents shearing deformation of the seismic isolation device at the construction stage and prevents a horizontal force generated during construction from acting on the seismic isolation device. It relates to a method for preventing shear deformation of sliding materials and seismic isolation devices.

[0002]

2. Description of the Related Art Conventionally, as measures against horizontal behavior of a seismic isolation device in the construction of a seismic isolation structure, two methods, that is, a skeleton construction precedent system and a seismic isolation device construction precedent system are roughly classified. In the framing construction advance method, the load generated by the framing load, the loading load, the horizontal load, etc. is temporarily received by a temporary receiving jig until the construction of the upper skeleton is completed, and the temporary lifting work is performed by jacking up and down after the framing is completed. Remove the receiving jig and attach the seismic isolation device.

[0003] On the other hand, the seismic isolation device prior construction method is to set the seismic isolation device at the correct position and height after placing the foundation concrete, and to perform the construction by supporting the vertical load of the upper skeleton by the seismic isolation device. is there. In order to eliminate the influence of uneven load and horizontal force on the seismic isolation device that occurs during construction, the rubber laminated rubber that composes the seismic isolation device is tied to the laminated rubber by steel and the jig of the horizontal fixing jig to the laminated rubber is used. We are taking measures such as installation.

[0004]

Particularly, in the construction of a roof such as an arch roof, a thrust acts on the seismic isolation device due to the stringed beam structure, but a horizontal force which causes shear deformation is particularly apt to act. However, in the conventional seismic isolation device construction prior system, the seismic isolation device is restrained so as to prevent shear deformation, but no method for releasing the horizontal force generated during construction has been studied.

[0005] In view of the above circumstances, the present invention provides a device for preventing shear deformation of a seismic isolation device, and a sliding material that does not cause a horizontal force generated during construction to act on the seismic isolation device without causing shear deformation in the seismic isolation device. The purpose of the present invention is to provide a method for preventing shear deformation of a seismic isolation device.

[0006]

According to a first aspect of the present invention, there is provided a shear deformation device for a seismic isolation device, comprising: a sliding member on which a seismic isolation device mounted on a leg of the pillar is mounted; and an upper flange of the seismic isolation device. And a fastening means for fixing the deformation preventing and reinforcing means to the leg of the seismic isolation device.

According to a second aspect of the present invention, there is provided a shear deformation device for a seismic isolation device, wherein a loose hole is provided in a lower flange of the seismic isolation device, and the loose hole is penetrated to connect the sliding member and the lower flange. It is characterized in that fixing means is provided.

The sliding material according to claim 3 is fixed to a sliding pad affixed to a base plate for receiving a seismic isolation device fixed to a foundation supporting a column via the seismic isolation device, and to a lower flange of the seismic isolation device. And a stainless steel plate.

According to a fourth aspect of the present invention, there is provided a method for preventing shear deformation of a seismic isolation device, comprising fixing a seismic isolation device receiving base plate to which a sliding pad is attached at an installation position of a steel column, and a lower flange on an upper surface of the seismic isolation device receiving base plate. After placing the seismic isolation device with a stainless steel plate fixed on it, a steel column having a base plate is placed on the upper flange of the seismic isolation device, and the steel column with respect to the lower flange of the seismic isolation device, and the It is characterized in that the deformation preventing reinforcing material is fixed to a position where the relative displacement of the upper flange in the horizontal direction can be restrained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows details of a device for preventing shear deformation of a seismic isolation device in roof construction according to the present invention. Reference numeral 1 denotes a shear deformation preventing device, 2 denotes a seismic isolation device, 3 denotes a sliding member, and 4 denotes a deformation preventing and reinforcing means. As is clear from FIG. 1, the seismic isolation device 2 is in a state where horizontal rigidity is secured by the deformation preventing and reinforcing means 4, and the horizontal behavior between the roof column 7 and the seismic isolation device 2 is also restricted. However, the seismic isolation device 2 and the roof pillar 7 are integrated,
It has a structure that allows horizontal movement via the sliding member 3.

In general, the seismic isolation device 2 is provided with a columnar laminated rubber 2c, and upper and lower disc-shaped upper and lower flanges 2a and 2b at its upper and lower ends. The laminated rubber 2c is formed by alternately stacking iron plates and rubber sheets on a sandwich, and has a characteristic that the vertical rigidity is large but the horizontal rigidity is small.

The upper flange 2a and the lower flange 2b constituting the seismic isolation device 2 are provided for connection to a building placed on the upper part of the seismic isolation device 2 and a foundation 11. And made of an iron member. In the present embodiment, a roof column 7 having a base plate 7a on a leg is provided above the seismic isolation device 2.
Is placed.

The anti-shear device 1 for securing the horizontal rigidity of the seismic isolation device 2 is designed to engage with the seismic isolation device receiving base plate 10 fixed to the foundation 11 and the outer peripheral portion of the seismic isolation device 2. , The fastening means for fastening the deformation preventing and reinforcing means 4 to the seismic isolation device 2, and the sliding provided between the seismic isolating device 2 and the base plate 10 for receiving the seismic isolation device. Material 3.

The deformation preventing and reinforcing means 4 fixed at several places so as to bite into the outer peripheral surface of the seismic isolation device 2 is provided in the horizontal direction at the upper flange 2a and the lower flange 2b of the seismic isolation device 2. And the base plate 7a of the roof column 7 and the seismic isolation device 2 are integrally connected. The deformation prevention reinforcing means 4
Is provided between two hook-like vertical plates 5 that are vertically erected in a state of biting into the seismic isolation device 2, and is provided between the two hook-like vertical plates 5. A hook-shaped plate 6 in which a side plate 6b having a length obtained by adding the height of the seismic isolation device 2 and the thickness of the base plate 7a to the upper plate 6a horizontal to the flange 2a is vertically combined. ing. The member of the deformation preventing and reinforcing means 4 is made of a steel material.

When the seismic isolation device 2 is viewed from above, the deformation preventing and reinforcing means 4 is usually attached to the disk-shaped upper flange 2a in consideration of the engagement with the beam 12 to be mounted on the roof pillar 7 later. It is arranged at four places at intervals of ° and is fastened using fastening means. As a fastening means for fastening the deformation preventing and reinforcing means 4 to the seismic isolation device 2, a high-strength bolt 8 having a high tensile strength, which is generally used for a joint of a steel structure, is used.

As described above, the deformation preventing and reinforcing means 4 is such that the side plate 6b constituting the hook-shaped plate 6 is formed by the upper flange 2a.
And the upper plate 6a and the base plate 7a of the steel column 7 placed on the seismic isolation device 2 via the high-strength bolt 8 while being in contact with the outer peripheral portion of the lower flange 2b. By being integrally fastened to the upper flange 2a of the seismic isolation device 2, the seismic isolation device 2 is fixed to the seismic isolation device 2.

The fastening positions of the deformation preventing / reinforcing means 4 are four at 90 ° intervals. However, if the seismic isolation device 2 can be restrained from being deformed in the horizontal direction, the fastening positions are 120 °.
Three intervals or the like may be provided, and both the fastening position and the number of fastening locations are not limited thereto.

As described above, since the roof column 7 is fastened to the seismic isolation device 2 by the deformation preventing / reinforcing means 4, the axial force and horizontal force received by the roof column 7 during construction are not changed. 2 will be transmitted. Further, the seismic isolation device 2 to which these forces are transmitted is not restricted in vertical deformation by the above configuration, but is restricted in horizontal deformation, so that a horizontal force is applied to the seismic isolation device 2. Even if it is, the shear deformation does not occur in the laminated rubber 2c constituting the seismic isolation device 2.

On the other hand, the seismic isolation device 2 to which the deformation preventing and reinforcing means 4 is attached is mounted on the upper surface of the seismic isolation device receiving base plate 10 via the sliding member 3.
The sliding member 3 is composed of a combination of the stainless steel plate 3a and the sliding pad 3b, and the stainless steel plate 3a is fixed to the bottom surface of the lower flange 2b of the seismic isolation device 2 by welding. The sliding pad 3b is affixed to the upper surface of the seismic isolation device receiving base plate 10 fixed to the foundation 11. The sliding member 3 attached in this way includes the stainless steel plate 3a fixed to the lower flange 2b of the seismic isolation device 2 and the sliding pad 3 attached to the upper surface of the seismic isolation device receiving base plate 10.
The sliding surface is formed on the surface of the stainless steel plate 3a and the sliding pad 3b by utilizing the fact that the frictional resistance between the stainless steel plate 3a and the sliding pad 3b is extremely small.

The seismic isolation device 2 includes the lower flange 2b
Are connected to the seismic isolation device receiving base plate 10 through the bolts 9 passing through the plurality of loose holes 2d provided to the extent that the sliding member 3 can move horizontally. The loose hole 2d and the bolt 9 have a stopper function, and when the horizontal isolation of the seismic isolation device 2 to which the deformation preventing and reinforcing means 4 is attached by the sliding material 3 occurs, the horizontal displacement is reduced. To control.

With these configurations, the seismic isolation device 2 provided with the shear deformation preventing device 1 is formed on the leg of the roof column 7. When a horizontal force of a certain magnitude or more acts on the seismic isolation device 2 to which the deformation prevention reinforcement means 4 is attached, the shear deformation prevention device 1 causes the seismic isolation device 2 itself to slide the sliding member 3. It moves in the horizontal direction and releases the horizontal force applied to the vicinity of the seismic isolation device 2.

Next, the construction method of the present invention will be described. First, the base plate 10 on which the sliding pad 3b constituting the sliding member 3 is adhered to the upper surface of the base 11 at a predetermined position where the roof pillar 7 is to be installed is fixed by fixing means. The seismic isolation device 2 in which the stainless steel plate 3a constituting the sliding member 3 is attached to the bottom surface of the lower flange 2b in advance is placed on the upper surface of the seismic isolation device receiving base plate 10 via the sliding pad 3b. Then, after aligning a hole (not shown) provided in the base plate 10 with the seismic isolation device with the loose hole 2d provided in the lower flange 2b, the bolt 9 is penetrated therethrough and fixed. At this time, the bolt 9 and the seismic isolation device receiving base plate 10 are fixed, but the lower flange 2b is in a state in which the bolt 9 can only move through the loose hole 2d and can move in the horizontal direction. Connect to secure.

Thereafter, before placing the roof pillar 7 on the upper part of the seismic isolation device 2, the upper plate 6a of the hook-like plate 6 constituting the deformation preventing and reinforcing means 4 is previously attached to the upper surface of the base plate 7a. And the side plate 6b is positioned so as to be in contact with the outer peripheral portions of the upper flange 2a and the lower flange 2b of the seismic isolation device 2, and then the hook-shaped plate is 6, the upper plate 6a, the base plate 7a, and the upper flange 2a are fastened, and the deformation preventing and reinforcing means 4 is fixed so as to mesh with the seismic isolation device 2. Attachment of the deformation preventing and reinforcing means 4 is performed at four locations at 90 ° intervals on the disk-shaped upper flange 2a when viewed from above the seismic isolation device 2.

Performing the roof construction under the conditions described above,
After the construction is completed, the deformation preventing / reinforcing means 4 is removed, the base plate 7a and the upper flange 2a are fastened again using fixing means, and the lower flange 2b and the base plate 10 which constitute the seismic isolation device 2 are attached. Are completely fastened by the bolt 9 so that the seismic isolation device 2 itself does not move horizontally on the sliding member 3 and resists the pull-out force. At this time, the washer 13 used for the bolt 9 is made of a thick and wide steel material so as to sufficiently cover the bolt hole of the loose hole 2d, and if necessary, the washer 13 is welded to the lower flange 2b. You may.

According to the configuration described above, the shear deformation preventing device 1 has the deformation preventing reinforcing means 4 so that
Horizontal behavior of roof column 7 with respect to seismic isolation device 2 and upper flange 2a with respect to lower flange 2b of said seismic isolation device 2
Of the seismic isolation device during construction can be prevented with a simple structure.

Further, since the seismic isolation device 2 is mounted on the upper surface of the seismic isolation device receiving base plate 10 via the sliding material 3, the seismic isolation device 2 generated when performing roofing is constructed.
Can be released by the horizontal movement of the seismic isolation device 2 itself using the sliding material 3,
Work such as moving the position of the seismic isolation device 2 using external force is not required, and it is not necessary to consider the influence of horizontal force generated during construction at the design stage. And not.

Further, the deformation preventing and reinforcing means 4 used in the shear deformation preventing device 1 is only required to be able to withstand the frictional resistance with the sliding material 3 and does not require a special steel material. No cost required

[0028]

According to the first aspect of the present invention, the sliding member on which the seismic isolation device mounted on the leg of the pillar is mounted, and the relative displacement of the upper flange and the lower flange of the seismic isolation device in the horizontal direction. And a fastening means for fixing the deformation preventing and reinforcing means to the legs of the seismic isolation device, thereby preventing the shear deformation of the seismic isolation device during construction with a simple structure. In addition, since the temporary member used during construction is only the deformation preventing and reinforcing means, the workability is good, and the cost for new construction can be reduced.

According to the second aspect of the present invention, a loose hole is provided in a lower flange of the seismic isolation device, and a fixing means which penetrates the loose hole and connects the sliding member and the lower flange is provided. Therefore, the seismic isolation device can serve as a stopper for controlling horizontal movement when the seismic isolation device moves on the surface of the sliding material with a simple device.

According to the third aspect of the present invention, the sliding pad attached to the base plate for receiving the seismic isolation device fixed to the foundation supporting the column via the seismic isolation device and the lower flange of the seismic isolation device are fixed. Since a stainless steel plate is provided, a simple slip-type seismic isolation device is attached to the lower part of the seismic isolation device, so that horizontal force acting on the seismic isolation device during construction can be released.

According to the fourth aspect of the present invention, the seismic isolation device receiving base plate having the sliding pad attached thereto is fixed to the installation position of the steel column, and a stainless steel plate is fixed to the lower flange on the upper surface of the seismic isolation device receiving base plate. After placing the seismic isolation device, a steel column having a base plate is placed on the upper flange of the seismic isolation device, and the steel column with respect to the lower flange of the seismic isolation device, and the horizontal direction of the upper flange of the seismic isolation device. Since the deformation preventing reinforcement is fixed at a position where the relative displacement of the seismic isolation device can be restrained, it is possible to prevent the shear deformation of the seismic isolation device during construction with a simple structure, and to use the seismic isolation device. There is no need to change the design of the device itself, and it is possible to keep the cost of newly adding low.

[Brief description of the drawings]

FIG. 1 is a view showing details of a side surface of a shear deformation preventing device according to the present invention.

FIG. 2 is a diagram showing details of an upper surface of the shear deformation preventing device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shear deformation prevention device 2 Seismic isolation device 2a Upper flange 2b Lower flange 2c Laminated rubber 2d Loose hole 3 Sliding material 3a Stainless steel plate 3b Sliding pad 4 Deformation prevention reinforcing means 5 Hook-shaped vertical plate 6 Hook-shaped plate 6a Upper plate 6b Side plate 7 Roof pillar 7a Base plate 8 High strength bolt 9 Bolt 10 Base plate for seismic isolation device 11 Foundation 12 Beam 13 Washer

Claims (4)

[Claims] 1. A sliding member on which a seismic isolation device mounted on a leg of a pillar is mounted, and a deformation prevention reinforcing means for restraining a horizontal relative displacement of an upper flange and a lower flange of the seismic isolation device; A fastening means for fixing the deformation prevention reinforcing means to the leg portion of the seismic isolation device. 2. The apparatus according to claim 1, wherein a loose hole is provided in a lower flange of the seismic isolation device, and the sliding member and the lower portion are penetrated through the loose hole. A device for preventing shear deformation of a seismic isolation device, wherein a fixing means for connecting a flange is provided. 3. A slipping material used for the device for preventing shear deformation of a seismic isolation device according to claim 1, wherein the base plate is fixed to a foundation supporting a column via the seismic isolation device. A sliding material comprising: a sliding pad to be attached; and a stainless steel plate fixed to a lower flange of the seismic isolation device. 4. A seismic isolation device receiving base plate having a sliding pad attached thereto is fixed to a steel column installation position, and a seismic isolation device having a stainless steel plate fixed to a lower flange is mounted on the upper surface of the seismic isolation device receiving base plate. Then, placing a steel column having a base plate on the upper flange of the seismic isolation device, and restraining the horizontal displacement of the steel column and the upper flange of the seismic isolation device with respect to the lower flange of the seismic isolation device. A method for preventing shear deformation of seismic isolation devices, characterized in that a deformation prevention reinforcing material is fixed in a position where it is possible.