JP6165474B2 - Seismic isolation device and seismic isolation device replacement method - Google Patents

Description

  The present invention relates to a seismic isolation device and a seismic isolation device replacement method for exchanging the seismic isolation device.

  Conventionally, seismic isolation devices have been used to protect buildings and structures from vibrations such as earthquakes. Since the seismic isolation device supports the structure at its upper part, it was necessary to jack up the structure when replacing the seismic isolation device due to deterioration or the like. However, jacking up structures requires significant costs and labor. So, in patent document 1, the elastic body which comprises a part of seismic isolation apparatus is cut | disconnected, an old seismic isolation apparatus is removed, and the new seismic isolation apparatus is installed. However, it takes time to cut the elastic body.

JP-A-11-182055

  The present invention has been made in consideration of the above-described facts, and an object thereof is to provide a seismic isolation device that can be easily replaced and a seismic isolation device replacement method using the seismic isolation device.

In order to achieve the above object, a seismic isolation device according to claim 1 of the present invention is a base plate fixed on a foundation and coated with a fluorine resin coating on a flat upper surface to form a fixed sliding layer. The structure board fixed under the structure and having a flat sliding surface with a fluororesin coating and a fixed sliding layer formed thereon is disposed between the foundation board and the structure board. A seismic device main body, an upper mounting plate member that is laminated and fixed to a vertical upper end surface of the seismic isolation device main body, has an upper surface that supports the structure plate and is formed of a fluororesin, and a vertical direction of the seismic isolation device main body A lower mounting plate member laminated and fixed to a lower end surface and having a lower surface formed of a fluororesin supported on the base plate, the upper mounting plate member and the structure plate, and the lower mounting plate member and the base Fix and fix at least one of the plates It comprises a fixing member to allow removal, the.

  In the seismic isolation device according to claim 1, the upper mounting plate member is disposed on the upper end surface of the seismic isolation device main body, and the lower mounting plate member is disposed on the lower end surface. The upper surface of the upper mounting plate member is made of fluororesin, and the lower surface of the lower mounting plate member is made of fluororesin. Therefore, the friction coefficient between the upper mounting plate member and the structure plate and the friction coefficient between the lower mounting plate member and the base plate can be reduced. Thereby, the fixing by the fixing member is released, and by applying a horizontal force to the seismic isolation device main body, the seismic isolation device main body is slid while being in contact with the structural plate and the base plate. It can be removed from between the boards. Since the seismic isolation device main body can be removed in this way, the seismic isolation device can be easily replaced without jacking up the structure.

The seismic isolation device according to claim 2 of the present invention is characterized in that the coefficient of friction between the upper surface and the structural plate, and the distance between the lower surface and the base plate is 0.1 or less. To do.
The friction coefficient between the upper mounting plate member and the structure plate, and the lower mounting plate member and the base plate is usually μ = 0.3 to 0.8. Therefore, by setting it to 0.1 or less, which is smaller than usual, the seismic isolation device body can be slid while being in contact with the structure plate and the base plate, and removed from between the structure plate and the base plate.

A seismic isolation device exchanging method according to claim 3 of the present invention includes a base plate fixed on a foundation, a structure plate fixed under the structure, and the base plate and the structure plate. A first seismic isolation device main body, an upper mounting plate member that is laminated and fixed to the upper end surface in the vertical direction of the first seismic isolation device main body, has an upper surface that supports the structure plate and is formed of a fluororesin, A lower mounting plate member that is laminated and fixed to a lower end surface in the vertical direction of the first seismic isolation device main body, has a lower surface that is supported on the base plate and formed of a fluororesin, the upper mounting plate member, and the structure plate; A seismic isolation device exchanging method for exchanging a seismic isolation device comprising: a fixing member that fixes and fixes at least one of the lower mounting plate member and the base plate ; a step of releasing the fixing by the fixing member, the basic plate and the structure plate Between the step of inserting a part of the second seismic isolation device main body, applying a horizontal force to the second seismic isolation device main body and pushing between the structure plate and the base plate, A step of extruding the first seismic isolation device main body from between the structure plate and the base plate, an upper mounting plate member fixed to the second seismic isolation device main body by the fixing member, the structure plate, and the second The lower mounting plate member fixed to the seismic isolation device main body and at least one of the foundation plates are fixed.

  The seismic isolation device replacement method according to claim 3 uses the seismic isolation device according to claim 1, and after releasing the fixation by the fixing member, a horizontal force is applied to the seismic isolation device body to Remove the seismic isolation device body by sliding it between the base plate and the base plate. Then, the upper mounting plate member and the lower mounting plate member of another seismic isolation device are arranged between the structure plate fixed below the structure and the base plate fixed on the foundation, and the upper mounting plate is fixed by the fixing member. At least one of the member and the structure plate, and the lower mounting plate member and the base plate is fixed.

  In this way, by applying a horizontal force to the seismic isolation device main body, the seismic isolation device main body is slid while being in contact with the structure plate and the base plate, removed from between the structure plate and the base plate, and a new exemption is performed. Since the seismic device main body can be installed, the seismic isolation device can be easily replaced without jacking up the structure.

In the seismic isolation device replacement method according to claim 4, the horizontal force applied to the second seismic isolation device main body is caused to act by bringing a jig into contact with the upper mounting plate member and the lower mounting plate member. It is characterized by.

  Thus, by using a jig, it is not necessary to directly contact the seismic isolation device main body, and damage to the seismic isolation device main body at the time of replacement can be prevented.

  As described above, according to the present invention, the seismic isolation device can be easily replaced.

It is a sectional side view of the seismic isolation apparatus which concerns on this embodiment. It is explanatory drawing of the procedure at the time of replacing | exchanging the seismic isolation apparatus which concerns on this embodiment (C). It is explanatory drawing of the procedure (D)-(E) at the time of replacing | exchanging the seismic isolation apparatus which concerns on this embodiment. It is a sectional side view of the seismic isolation apparatus which concerns on the modification of this embodiment.

  Hereinafter, a seismic isolation device 10 according to an embodiment of the present invention and a method for replacing the seismic isolation device 10 will be described with reference to the drawings.

  FIG. 1 shows a seismic isolation device 10 according to the present embodiment. The seismic isolation device 10 is disposed between the foundation 30 and the structure 32 and supports the structure 32 on the foundation 30. A base plate 24 is fixed at a position where the seismic isolation device 10 of the base 30 is installed. The structure plate 22 is fixed at a position corresponding to the base plate 24 on the lower surface of the structure 32. The base plate 24 and the structure plate 22 are formed of stainless steel plates. The surface of the base plate 24 and the base plate 30 of the structure plate 22 that is not attached to the structure 32 (the upper surface of the base plate 24 and the lower surface of the structure plate 22) is flat and is coated with a fluororesin coating and fixed. Sliding layers 24TF and 22TF are respectively formed.

  Examples of fluororesins include polytetrafluoroethylene (PTFE), tetrafluoroethylene / hexafluoropropylene copolymer (FEP), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA), and ethylene / tetrafluoroethylene copolymer. Examples include coalescence (ETFE) and polyvinylidene fluoride (PVDF). In the present invention, polytetrafluoroethylene (PTFE) is particularly preferable in that the friction coefficient can be reduced.

  The seismic isolation device 10 includes a seismic isolation device main body 12, an upper mounting plate member 14, a lower mounting plate member 18, a structure plate 20, and a foundation plate 24. The seismic isolation device main body 12 is a cylindrical laminated body in which a plurality of disc-shaped metal plates 12A and a plurality of disc-shaped rubbers 12B are alternately laminated in the thickness direction (arrow B direction). ing. The metal plate 12A and the rubber 12B are firmly integrated by vulcanization adhesion. In this way, not only the rubber 12B but also the metal plates 12A are alternately laminated so that they have a predetermined rigidity with respect to the load in the vertical direction (arrow B direction), and the horizontal direction (arrow For a load in the direction (E), a spring function is exhibited and a predetermined deformation amount can be secured.

  The outer diameter of the metal plate 12A is made smaller than the outer diameter of the seismic isolation device main body 12, and the coating rubber 13 is disposed in a cylindrical shape on the outer edge of the metal plate 12A. The covering rubber 13 covers the metal plate 12A, so that the metal plate 12A is not exposed to the outside and deterioration is prevented.

  An upper mounting plate member 14 is fixed to the upper end of the seismic isolation device main body 12 in the thickness direction B. A lower mounting plate member 18 is fixed to the lower end of the seismic isolation device main body 12 in the thickness direction B. The upper mounting plate member 14 and the lower mounting plate member 18 are made of thick disk-shaped steel plates and have an outer diameter larger than that of the seismic isolation device main body 12. The seismic isolation device main body 12 is disposed at the center of the upper mounting plate member 14 and the lower mounting plate member 18. The upper mounting plate member 14 and the lower mounting plate member 18 are formed with a plurality of mounting holes H along the outer periphery. On the upper surface of the upper mounting plate member 14, a fluororesin coating is applied to form a mounting sliding layer 14TF. Further, the lower surface of the lower mounting plate member 18 is also coated with fluororesin to form a mounting sliding layer 18TF.

  The seismic isolation device main body 12 is disposed between the base plate 24 and the structure plate 22, and the mounting sliding layer 18 TF of the lower mounting plate member 18 is disposed in contact with the fixed sliding layer 24 TF on the base plate 24. Further, the mounting sliding layer 14TF of the upper mounting plate member 14 is disposed in contact with the fixed sliding surface 22TF below the structure plate 22. The lower mounting plate member 18 is fixed to the structural plate 22 by screwing a bolt BT as a fixing member into the fastening portion 22N of the structural plate 22 through the mounting hole H. The upper mounting plate member 14 is also fixed to the base plate 24 by a bolt BT as a fixing member screwed into the fastening portion 24N of the base plate 24 through the mounting hole H. The friction coefficient between the fixed sliding layer 24TF of the base plate 24 and the mounting sliding layer 18TF of the lower mounting plate member 18 is 0.1 or less, and the fixed sliding layer 22TF of the structure plate 22 and the upper mounting plate member 14 are mounted. The coefficient of friction with the sliding layer 14TF is also 0.1 or less.

  The seismic isolation device main body 12 receives a load from the structure 32, is slightly compressed and deformed, and has a shorter length in the vertical direction than an unloaded state. In this state, when the foundation 30 and the structure 32 move relative to each other in the horizontal direction, the vibration energy of the relative movement is partially absorbed by the shear deformation of the seismic isolation device main body 12.

  Next, replacement of the seismic isolation device 10 will be described. The seismic isolation device 10 is replaced by replacing the seismic isolation device main body 12 together with the upper mounting plate member 14 and the lower mounting plate member 18.

  First, as shown in FIG. 2A, the replacement seismic isolation device main body 12N is compressed in the vertical direction B using the jig 40, and the length in the vertical direction B is set to the foundation plate 22 and the foundation. The length is reduced to a length that can be inserted between the plates 24. The jig 40 includes a pair of sandwiching portions 40A for sandwiching the lower mounting plate member 18 and the upper mounting plate member 14 from the outside, and a pair of sandwiching portions 40A, and an expansion / contraction portion 40B that can be expanded and contracted. it can. In the present embodiment, the two jigs 40 are respectively arranged at positions facing the seismic isolation device main body 12 and compressed. The seismic isolation device main body 12N may be compressed only on the insertion side. Next, as shown in FIG. 2-1 (B), the bolt BT of the seismic isolation device 10 in the installed state is removed to release the fixing of the lower mounting plate member 18 to the structure plate 22 and the upper mounting plate. The fixing of the member 14 to the base plate 24 is released. Then, as shown in FIG. 2-1 (C), the compressed seismic isolation device main body 12N is partially inserted between the structure plate 22 and the base plate 24 from the side opposite to the moving direction of the seismic isolation device main body 12. Then, the jig 40 is removed to support the structure 32. Next, as shown in FIGS. 2-2 (D) -1 and 2, a horizontal force F is applied to the seismic isolation device main body 12N using the horizontal jack 42. At this time, the horizontal jack 42 uses a jig 42 </ b> A for contacting each of the upper mounting plate member 14 and the lower mounting plate member 18 without directly contacting the seismic isolation device main body 12. As shown in FIG. 2-2 (D) -2, the jig 42A has an arc-shaped contact surface 42B along the peripheral surface of the upper mounting plate member 14 and the lower mounting plate member 18, The seismic isolation device main body 12 is pushed by 42B, and the force F is applied. In this manner, the seismic isolation device main body 12N is pushed together with the upper mounting plate member 14 and the lower mounting plate member 18, and the seismic isolation device main body 12 is pushed out from between the structure plate 22 and the base plate 24. Then, the seismic isolation device main body 12N is arranged at a predetermined position between the base plate 24 and the structure plate 22 and fixed to the base plate 24 and the structure plate 22 with bolts BT as shown in FIG. To do.

In the seismic isolation device 10 of this embodiment, the coefficient of friction between the base plate 24 and the lower mounting plate member 18 is 0.1 or less, and the coefficient of friction between the structure plate 22 and the upper mounting plate member 14 is also set. 0.1 or less. For example, in a single seismic isolation device 10, assuming that the load from the structure 32 is 13 N / mm ² and the diameter of the seismic isolation device body 12 is 800 mm, a commercially available maximum load of 1000 kN (
It can be easily moved by a horizontal jack 42 of about 100 tons). Therefore, the seismic isolation device main body 12 can be easily removed by sliding while making contact with the structure plate 22 and the base plate 24. Thereby, the seismic isolation device 10 can be easily replaced without jacking up the structure 32.

  In the above description, the jig 42A is not brought into direct contact with the seismic isolation device main body 12N, but the jig 42A is brought into contact with the upper mounting plate member 14 and the lower mounting plate member 18 to apply a horizontal force F to the seismic isolation device main body 12N. Therefore, it is possible to prevent the seismic isolation device main body 12N from being damaged at the time of replacement.

  In the present embodiment, the base plate 24, the lower mounting plate member 18, the structure plate 22, and the upper mounting plate member 14 are coated with fluororesin. However, for the base plate 24 and the structure plate 22, It may be a material. In the present embodiment, the fluororesin coating is performed. However, instead of the fluororesin coating, a plate material using a fluororesin material may be attached to the corresponding surface, or the base plate 24, the lower mounting plate member 18, and the structure. All or some members of the plate 22 and the upper mounting plate member 14 may be made of a fluororesin material.

  In the present embodiment, the friction coefficient between the structural plate 22 and the upper mounting plate member 14 and the friction coefficient between the base plate 24 and the lower mounting plate member 18 are set to 0.1 or less. It is not necessarily limited to 0.1 or less, and may be a normal friction coefficient of 0.3 or less.

  In the present embodiment, the laminated body in which the metal plates 12A and the rubber 12B are alternately laminated is used as the seismic isolation device body. However, even if the laminated body is composed of a single rubber, it has other configurations. It may be.

  In this embodiment, the upper mounting plate member 14 and the lower mounting plate member 18 are fixed to the base plate 24 and the structure plate 22, respectively. However, as shown in FIG. Instead of either the plate member 14 or the lower mounting plate member 18 (the lower mounting plate member 18 in FIG. 3), the sliding plate 19 is fixed to the seismic isolation device main body 12 and applied to the sliding support 11. Also good.

  Further, the present invention may be applied to all of a plurality of seismic isolation devices for supporting one structure, or may be applied to only some seismic isolation devices. For example, in order to periodically check the performance of a seismic isolation device, apply it to only one seismic isolation device, take out the seismic isolation device body of the seismic isolation device, and check the performance with the removed seismic isolation device body. May be.

10 Seismic isolation device 12 Seismic isolation device body 14 Upper mounting plate member 14TF Mounting sliding layer (lower surface)
18 Lower mounting plate member 18TF Mounting sliding layer (upper surface)
22 Structure board (structure)
24 Foundation board (foundation)
30 Foundation 32 Structure BT Bolt (fixing member)

Claims (4)

A base plate fixed on the foundation and having a fixed sliding layer formed by applying a fluororesin coating on the flat upper surface ;
A structure board fixed under the structure and having a flat sliding surface with a fluororesin coating and a fixed sliding layer formed thereon ;
A seismic isolation device body disposed between the foundation plate and the structure plate;
An upper mounting plate member that is laminated and fixed to the upper end surface in the vertical direction of the seismic isolation device main body, has an upper surface that supports the structure plate and is formed of a fluororesin,
A lower mounting plate member having a lower surface that is laminated and fixed to the lower end surface in the vertical direction of the seismic isolation device main body and supported on the base plate and formed of a fluororesin;
While fixing at least one of the upper mounting plate member and the structure plate, and the lower mounting plate member and the base plate, a fixing member capable of releasing the fixing,
Seismic isolation device with   The seismic isolation device according to claim 1, wherein a friction coefficient between the upper surface and the structure plate and a friction coefficient between the lower surface and the base plate are 0.1 or less. . A base plate fixed on the foundation, a structure plate fixed below the structure, a first seismic isolation device body disposed between the base plate and the structure plate, and the first seismic isolation An upper mounting plate member that is laminated and fixed to the vertical upper end surface of the apparatus main body, has an upper surface that supports the structure plate and is formed of a fluororesin, and is laminated and fixed to the lower vertical end surface of the first seismic isolation apparatus main body. A lower mounting plate member supported on the base plate and having a lower surface formed of a fluororesin, the upper mounting plate member and the structure plate, and at least one of the lower mounting plate member and the base plate fixed And a seismic isolation device exchanging method for exchanging the seismic isolation device provided with a fixing member capable of releasing the fixing ,
Releasing the fixing by the fixing member of the seismic isolation device ;
Inserting a part of the second seismic isolation device main body between the structure plate and the base plate;
A step of applying a horizontal force to the second seismic isolation device main body to push between the structure plate and the base plate, and pushing the first seismic isolation device main body from between the structure plate and the base plate. When,
At least one of the upper mounting plate member and the structural plate fixed to the second seismic isolation device main body by the fixing member, and the lower mounting plate member and the base plate fixed to the second seismic isolation device main body. To fix,
Seismic isolation device replacement method. 4. The immunity according to claim 3, wherein the horizontal force applied to the second seismic isolation device main body acts by causing a jig to contact the upper mounting plate member and the lower mounting plate member. 5. Seismic device replacement method.

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