JPH0393981A - Method for connecting/disconnecting vibration isolating device and connector used for this method - Google Patents

Abstract

PURPOSE:To simplify connection and disconnection of a vibration isolating device by setting a space between the upper face of a pedestal and the mounting plate of an upper structure, and equalizing the distance between the upper face of a sliding device and the mounting plate to the rated height of the vibration isolating device. CONSTITUTION:A sliding device 30 comprising a lower sliding plate 32 and an upper sliding plate 33 is installed on the upper face of a pedestal 31 formed on the upper face of the foundation 3 of a building 1. Next the upper flange 42 and lower flange 43 of a vibration isolating device 4 are fixed to the mounting plate 6 of an upper structure 2 and the upper sliding plate 33, respectively. The upper sliding plate 33 stuck to the vibration isolating device 4 is supported by the fork 12 of a connector 10 and the vibration isolating device 4 is inserted into a space between the upper structure 2 and the upper face of the pedestal 31 and the upper flange 42 of the vibration isolating device 4 is fixed to the lower face of the upper structure 2. Then the upper sliding plate 33 is pressed in along the lower sliding plate 32 and the upper and lower sliding plates 33, 32 are fixed to each other.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a method for attaching and detaching a seismic isolation device applied to buildings made of reinforced concrete and the like, and a device for attaching and detaching the seismic isolation device used in the method. When the seismic isolation device is of the laminated rubber type, the method of installing or removing the seismic isolation device between the superstructure and foundation of the building, and the seismic isolation device used in that method. It is related to the attachment/detachment device of
[Prior Art] Generally, in medium-to-high-rise buildings, the entire upper structure of the building is supported by the foundation, and the horizontal force of the earthquake is absorbed by the deformation of the seismic isolation device, so that it is not transmitted as input to the building. With the development of seismic isolation structures, their track record as an effective seismic resistance measure is increasing, and laminated rubber-type seismic isolation devices are attracting attention.

However, as shown in FIGS. 3 and 4, in order to install the seismic isolation device 4 between the upper structure 2 and the foundation 3 of the building 1, which is formed as a structurally separate body, Either install the seismic isolation device 4 on the preceding foundation 3 and then build the superstructure 2 on top of it, or temporarily support the entire weight of the superstructure 2 with another seismic isolation device, etc. It is necessary to form an installation interval between the two and install the seismic isolation device 4 within that interval, and then remove the temporary support. As shown in Fig. 3, the method adopted as a conventional technique for this purpose is to raise the entire upper structure 2 using a lifting jack 5, and after installing the seismic isolation device, lower it and install it. As shown in Fig. 4, after being temporarily supported by a jack or other seismic isolation device, etc., it is attached to the lower surface of the installed and supported seismic isolation device 4 via the mounting plate 6 and anchor bolt 7, and the upper surface of the base fa3. A method is used in which mortar 8 for level adjustment is grouted between the formed pedestal and the temporary support is removed after the mortar has hardened. However, if necessary, such as periodic function check maintenance or replacement of the seismic isolation device,
There is no known way to get rid of this problem other than reversing the steps in these mounting methods. [Problems to be Solved by the Invention] However, in the above method, at least the entire upper structure is raised and its entire weight is temporarily supported to form an interval for attachment/detachment. It is necessary to use a jack, and it may be impossible to lift the structure using a jack in large-scale buildings such as nuclear power related facilities.

In addition, by destroying the grout mortar layer formed between the upper structure and the pedestal for level adjustment, it is possible to secure the necessary clearance below each seismic isolation device for installation and removal. It is necessary to reshape the mortar layer when inserting the device, and some other means is required to ensure the specified support surface pressure at that time, and there are structural uncertainties. Met.

In addition, as mentioned above, the laminated rubber type seismic isolation device installed between the foundation and the superstructure supports the entire weight of the superstructure, so each seismic isolation device itself also supports the weight. It is large, and the handling of inserting and removing it is not easy.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention was created by addressing new points of interest rather than eradicating the shortcomings of the prior art. In a method of installing a laminated rubber type seismic isolation device within the space between the lower surface of the superstructure and the upper surface of a pedestal on the foundation, a sliding device consisting of a pair of upper and lower wedge-shaped sliding plates is installed on the upper surface of the pedestal. The step of installing a lower sliding plate on the lower flange of the seismic isolation device,
The step of fixing the upper sliding plate of the sliding device, the upper sliding plate fixed to the seismic isolation device is supported by the fork of the detachable device, and a relative horizontal force is applied to the seismic isolation device to ensure that the seismic isolation device is fixed within the above distance. A step of applying shear deformation so that the upper structure can be pushed into the upper structure, a step of inserting the deformed seismic isolation device into the above-mentioned interval with the upper structure being separately supported, and a step of inserting the upper flange of the seismic isolation device into the lower surface of the upper structure. Fixing process: Press-fit the upper sliding plate fixed to the sheared seismic isolation device along the lower sliding plate to restore the seismic isolation device to its original shape, and then fix the upper and lower sliding plates. A method for attaching a seismic isolation device characterized by the above-mentioned method, a method for removing the seismic isolation device by performing the above method almost in reverse, and a method for removing the seismic isolation device that is used to carry out these methods. The present invention provides an attachment/detachment device. As a result, the seismic isolation device of any building can be installed and removed within a predetermined gap between the foundation and the upper i-structure under forced shear deformation in the operating state. [Embodiment] A method for attaching and detaching the seismic isolation device of the present invention will be described in detail based on drawings showing preferred embodiments. FIG. 1 is a vertical sectional view of the foundation of a high-rise building. In the figure, 1 is the building, 2 is the superstructure, 3 is the foundation of building l, and building 1 is the superstructure. The body 2 is supported by a seismic isolation device 4 on a plurality of pedestals 31 formed on the upper surface of a foundation 3. Reference numbers in FIGS. 3 and 4 are the same for the corresponding parts.

On the top surface of the pedestal 31, in place of the mounting plate 6 of the conventional seismic isolation device 4. Mainly lower sliding plate 32 and upper sliding plate 33
A sliding device 30 consisting of the following is installed.

The lower sliding plate 32 is a wedge-shaped plate with a gentle slope formed on the upper surface.Fixing parts 34 are provided downward from both ends of the slope, and the pedestal is attached to the pedestal via an anchor bolt 7 formed in a cap nut 35. 31, and a guide groove 36 is provided on the slope in the direction of the fixing part 34.

The upper sliding plate 33 is a wedge-shaped plate whose lower surface has a gentle slope corresponding to the upper surface of the lower sliding plate 32 and whose upper surface is horizontal, and supports the seismic isolation device 4 on the upper surface. , A guide protrusion 37 corresponding to the guide groove 36 of the lower sliding plate 32 is provided on the lower surface to engage the two, and both the upper and lower sliding plates 33, 32 are slidable and fixed with bolts 38. In this case, the sliding device ffl30 becomes the base plate of the seismic isolation device 4.

The opposing surfaces of the upper and lower sliding plates 33 and 32, the guide groove 36, and the guide protrusion 37 are machined and subjected to anti-corrosion treatment. The bolt 38 is connected to the lower m moving plate 32 and the upper sliding plate 33.
When the sliding device 30 is superimposed in the installed state, it reaches the cap nut 35 of the anchor bolt 7.

39 is a reaction rod stretched between both anchoring parts 34, and is buried in the concrete of the pedestal 31.

Next, the seismic isolation device 4 adopted in the present invention is of a known type, and is of a laminated rubber type made by laminating a large number of steel plates and rubber alternately. It has an upper flange 42 for fixing, and a lower flange 43 on the lower surface, and is fixed to the mounting plate 6 of the upper structure 2 and the upper sliding plate 33 by fixing bolts 44 and 45, respectively. .

The seismic isolation device 4 includes a plurality of pedestals 31 on the top surface of the base @3.
It is installed above the button, supports the entire seismic force of the upper structure 2 without increasing the amplitude in the direction perpendicular to the button, and absorbs the horizontal seismic force by deforming in the horizontal direction.

Next, the attaching/detaching device for the seismic isolation device 4 used to install the seismic isolation device 4 as described above will be explained with reference to FIG. 2. The attachment/detachment device 10 of the present invention includes a main body 11, a fork 12 that is movable up and down relative to the main body 1l, and is shaped so that a laminated rubber type seismic isolation device 4 can be supported by an upper flange 42.
It is attached to the lower sliding plate 32 of the sliding device 30 installed on the pedestal 31 of the foundation 3, and applies horizontal shearing deformation to the seismic isolation device 4 through expansion and contraction operation, as well as applying force to move the seismic isolation device 4 forward and backward. double-acting jack 20 and this jack 20
The fork 12 is made up of columnar reaction force parts 13 and 14 that take reaction force for expansion and contraction, and the fork 12 can be raised and lowered along a lifting rail 15 provided on the reaction force part 14 during contraction.

16 is a counter anchor connected to the outer end of the counter force rod 39 and automatically anchored to the front part of the main body 11,
When extending the jack 20, a reaction force is applied to the pedestal 31 to prevent the attachment/detachment 110 from retreating. Although the attachment/detachment device 10 is constructed symmetrically with respect to the operating direction, rotation of the seismic isolation device 4 is prevented by the fork 12. In particular, it is preferable to use two jacks 20 in terms of stability and capacity. In addition, prestressed steel is used for the force-related members of the jack 20.

The seismic isolation device attaching/detaching device 10 of the present invention is a self-propelled traveling body used for handling and transporting the seismic isolation device 4, which is a heavy body, and is equipped with running wheels 17 below.
is provided with a horizontality adjustment device 18 for the attachment/detachment device 10, and the height of the attachment/detachment device 10 as a whole is such that it can run below the upper structure 2 at the upper surface of the base [3]. 19 is a counterweight for stabilizing the seismic isolation device 4 during operation.

It goes without saying that the structure of the attachment/detachment method of the present invention and the attachment/detachment device used in the method is not limited to the above-mentioned embodiments. 37 may be replaced. In addition, as long as the seismic isolation device 4 is of the laminated rubber type, various types of laminated rubber can be used, and the rated load, allowable displacement, design constants such as horizontal rigidity, jack capacity, etc. It can be selected depending on the scale of the building.

[Function] The operation of the method for attaching and detaching the seismic isolation device 4 of the present invention will be explained by the construction of the pedestal 31 on which the seismic isolation device 4 is installed, the mounting of the seismic isolation device 4 on its upper surface, and the removal from there. The explanation will be based on the process. In Figure 1, a building l adopting the present invention is shown.
In this case, a gap is set between the upper surface of the pedestal 31 formed on the foundation 3 and the mounting plate 6 of the upper structure 2, corresponding to the standard height H of the seismic isolation device 4. , lower sliding plate 3
2 and the upper sliding plate 33 are overlapped in the standard state, so that the distance between the top surface of the sliding device U30 and the mounting plate 6 is equal to the rated height H of the seismic isolation device 4. , a lower sliding plate 32 is installed on the pedestal 31. On the other hand, in FIG. 2, the seismic isolation device 4 first fixes the lower flange 43 and the upper sliding plate 33 of the sliding device 30 with bolts 45, supports the upper flange 42 with the fork 12, and jacks at that position. After adjusting the height relative to 20, the jack head 2l of the jack 2o and the opposite end of the upper sliding plate 33 are connected by screwing the connecting rod 22. Here, when the jack 20 is contracted, the lower part of the seismic isolation device 4 is deformed in the direction of the attachment/detachment device 10 due to the connection between the upper sliding plate 33 and the lower flange 43, and along with this shearing deformation, the isolation The main body 41 of the vibration device 4 is reduced in height to H'.

Therefore, if the seismic isolation device 4 is supported by the detachable device 110 and transported to the side of the pedestal 31 in this state, as long as the upper structure 2 is maintained at a predetermined height H, the seismic isolation device 4 will be It can be inserted into

Here, the upper flange 42 is fixed to the mounting plate 6 with fixing bolts 44, the jack 20 is gradually loosened, and the seismic isolation device 4
When the horizontal spring force is released while the main body 41 is in a self-balancing state, the connecting rod 22 is unscrewed and removed, and the upper sliding plate 3 is removed.
3 and the jack 20. Here, to return the seismic isolation device 4 to its original shape, move the upper sliding plate 33 to the lower sliding plate 3.
It acts in the direction of wedge-insertion along the upper surface of 2. Next, the jack 20 is extended while applying a reaction force to the reaction force part 13, and the upper end surface of the jack head 21 is prevented from retreating as a whole by the engagement of the anti-motor anchor 16 to the pedestal 31. By forcibly press-fitting the sliding plate 33, the upper sliding plate 33 moves to a predetermined relationship position with the lower sliding plate 32, and the connection using the bolts 38 shown in FIG. 1 becomes possible. The standard mounting condition is obtained.

When it becomes necessary to replace or maintain the existing seismic isolation device M4, it is generally possible to remove the seismic isolation device 4 from the mounting position by performing each step of the above-described mounting method in reverse order. That is, the fixing bolts 38 of the upper and lower sliding plates 33 and 32 installed on the pedestal 31 are released, and then the upper flange 42 of the seismic isolation device 4 is released from the mounting plate 6 of the upper structure 2. Jack 20 of attachment/detachment device 10
A rod 22 connects the jack head 21 and the upper sliding plate 33.
The upper part of the seismic isolation device 4 is supported by the fork 12 to take a reaction force to the reaction force part 14, and the lower part retracts the jack 20 while taking a reaction force to the pedestal 31.
By pulling out the upper sliding plate 33, horizontal shearing deformation is applied to the seismic isolation device 4, and when switching to complete support of the fork 12 of the attachment/detachment 110, the deformed seismic isolation device whose height has been reduced to H′ 4 can be removed from the pedestal 31 while being supported by the attachment/detachment device 10.

[Effects of the Invention] The method for attaching and detaching a seismic isolation device of the present invention is a method for attaching a laminated rubber type seismic isolation device within the interval between the lower surface of a superstructure of a building and the upper surface of a pedestal on a foundation. A step of installing a lower sliding plate of a sliding device consisting of a pair of upper and lower wedge-shaped sliding plates on the upper surface of the pedestal, and installing an upper sliding plate of the sliding device on the lower flange of the seismic isolation device. a step of fixing, a step of supporting the upper sliding plate fixed to the seismic isolation device with a fork of a detachable device, and applying a relative horizontal force to the seismic isolation device to apply shear deformation so that it can be inserted within the above-mentioned interval; inserting the deformed seismic isolation device into the space with the body supported separately; fixing the upper flange of the seismic isolation device to the lower surface of the superstructure; fixing the seismic isolation device to the shear-deformed seismic isolation device; Press-fit the upper sliding plate made along the lower sliding plate,
The present invention consists of an installation method that includes a step of fixing the upper and lower sliding plates after restoring the seismic isolation device to its original shape, and a removal method that generally carries out each step of the above installation method in reverse order. Since this method also incorporates the attachment/detachment device used in these methods, it not only eliminates all the shortcomings of the prior art, but also enables the installation/detachment of an epoch-making seismic isolation device that has never been attempted before. It can contribute to the development of methods and detachable devices. Furthermore, the structure is clear in principle and is based on the action of the seismic isolation device, and has the advantage that construction accuracy can be easily obtained without the need for special technology, and there are no restrictions on the location of application. There is. Further, although the present invention requires a small amount of material, it is particularly advantageous when applied to a building that is equipped with a large number of seismic isolation devices, and is an extremely innovative means of seismic resistance for buildings. be effective.

[Brief explanation of drawings]

The drawings are for explaining the attachment/detachment method of the seismic isolation device of the present invention and the attachment/detachment device used in the method. It is a schematic front view, and FIG. 2 is a front view similar to FIG. It is an explanatory diagram. 1...Building, 2...Superstructure, 3...Foundation,
4... Seismic isolation device, 5... Lifting jack, 6... Mounting plate, 7... Anchor bolt, 8... Mortar, 1
o... Attachment/detaching device, 1l... Main body, 12... Fork, 13, 14... Jack reaction force part, l5...
Lifting rail, 16... Reaction anchor 17... Traveling wheel, 18... Leveling adjustment device, 19... Counterweight, 2o... Jack, 21... Jack head, 22... Connecting rod, 30...Sliding device, 31.
...Pedestal, 32...Lower sliding plate, 33...Upper sliding plate, 34...Fixing part, 35...Cap nut, 3
6... Guide groove, 37... Guide protrusion, 38... Fixing bolt, 39... Reverse lever, 41... Main body, 42
... Upper flange, 43 ... Lower flange, 44, 45
...Fixing bolt. H. H'...height of the seismic isolation device. Building upper structure Foundation primate main unit Upper flange Lower flange Sliding narrow straight bed Lower sliding slope Upper sliding plate 3 Figure 2 Figure 4

Claims (4)

[Claims] (1) In a method of installing a laminated rubber type seismic isolation device within the space between the lower surface of the superstructure of a building and the upper surface of a pedestal on the foundation, a pair of upper and lower wedge-shaped sliding plates are installed on the upper surface of the pedestal. a step of installing a lower sliding plate of the sliding device, a step of fixing an upper sliding plate of the sliding device to the lower flange of the seismic isolation device, a step of installing the upper sliding plate of the sliding device fixed to the seismic isolation device; The process of supporting the moving plate with the forks of the detachable device and applying a relative horizontal force to the seismic isolation device to shear deformation so that it can be inserted into the above-mentioned interval, and with the upper structure separately supported, A step of inserting the seismic isolation device into the above-mentioned interval, a step of fixing the upper flange of the seismic isolation device to the lower surface of the upper structure, and a step of inserting the upper sliding plate fixed to the shear-deformed seismic isolation device along the lower sliding plate. A method for installing a seismic isolation device comprising the step of fixing upper and lower sliding plates after press-fitting and restoring the seismic isolation device to its original shape. (2) In a method for removing a laminated rubber type seismic isolation device installed between the upper structure of a building and a foundation pedestal via a sliding device, the upper and lower parts of the sliding device installed on the pedestal are removed. The process of releasing the fixation of the sliding plate is to apply a horizontal shear deformation to the seismic isolation device by pulling out the upper sliding plate while taking a reaction force to the lower sliding plate using the attachment/detachment device. A seismic isolation device characterized by including the steps of: releasing the upper flange from the upper structure using a fork of the attachment/detachment device; and detaching the deformed seismic isolation device from the pedestal while supporting it with the attachment/detachment device. How to escape. (3) An attachment/detachment device used in the attachment/detachment method of a seismic isolation device according to claims 1 and 2, wherein the attachment/detachment device includes a main body portion,
A fork that can be raised and lowered relative to the main body and is configured to support a laminated rubber-type seismic isolation device is attached to the upper sliding plate of a sliding device installed on the pedestal of the foundation, and is expanded and contracted by the fork. A seismic isolation device used in a method for attaching and detaching a seismic isolation device, characterized by comprising a jack that applies horizontal shear deformation to the seismic isolation device and moves the seismic isolation device back and forth, and a reaction force part for expanding and contracting the jack. attachment/detachment device. (4) The attachment/detachment device for a seismic isolation device according to claim 3, wherein the main body is equipped with a traveling means and a counterweight for the seismic isolation device supported by the fork.