JP2007139108A - Seismic isolation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seismic isolation device for sufficiently maintaining vibration damping property without damaging vibration damping alloys. <P>SOLUTION: A plurality of elastically deformable rubber rings 18 and a plurality of disc-shaped metal pates 20 for maintaining rigidity are alternately arranged to form an outside laminate 16. In a space of each of rubber rings 18 partitioned with a metal plate 20 at a central portion of the outside laminate 16, the vibration damping alloy 22 is fitted which is formed of a zinc-aluminum alloy superplastic metal into a cylindrical shape. Thus, the plurality of vibration damping alloys 22 are arranged between the metal plates 20 side by side with the rubber rings 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seismic isolation device capable of maintaining a sufficient damping characteristic without damaging a damping alloy, and further, a seismic isolation device having a damping characteristic equal to or higher than that of a conventional one without giving a load to the environment. About.

  2. Description of the Related Art Conventionally, seismic isolation devices that are arranged between a building and the ground that supports the building are known as members for reducing earthquake shaking. And this seismic isolation device has not only a laminated rubber obtained by laminating a rubber plate and a metal laminated plate, but also a damping alloy formed in a columnar shape for suppressing vibration caused by shaking, as a constituent member. The combined action of these members attenuated and reduced earthquake shaking, making it difficult to transmit earthquake shaking to the building.

  However, in the conventional seismic isolation device, as shown in FIG. 7, the cylindrical damping alloy 122 fits into the rubber plate 118 constituting the laminated rubber 116 and the through-hole 116 </ b> A existing in the center of the metal laminated plate 120. When the earthquake occurs and a large seismic wave is generated due to the earthquake, the inner surface of the laminated plate 120 is in strong contact with the input of the large seismic wave that is a repetitive displacement. There was a possibility that the surface of the damping alloy 122 was damaged, and the damping alloy 122 was eventually cut by the laminated plate 120. When the surface of the damping alloy 122 is scratched or cut by the inner peripheral surface of the laminated plate 120 as described above, sufficient vibration damping characteristics cannot be obtained by the seismic isolation device. .

On the other hand, lead materials are generally used as damping alloys for conventional seismic isolation devices from the viewpoint of damping characteristics. However, as environmental considerations have become important in recent years, damping alloys have been replaced with lead materials. From now on, it is considered to replace with other metal materials. However, other metal materials other than lead materials have low plastic deformation characteristics compared to lead materials, and sufficient vibration damping characteristics cannot be obtained, so it is difficult to employ other metal materials.
JP-A-1-250547

Based on the above, even if a large seismic wave with repeated displacement is applied to the seismic isolation device, we will develop a seismic isolation device that can maintain the damping characteristics sufficiently without damaging the damping alloy by the inner peripheral surface of the laminate. There was a need. In addition, there has been a need to develop a seismic isolation device having high vibration damping characteristics without imposing a burden on the environment.
In view of the above facts, the present invention aims to provide a seismic isolation device that can sufficiently maintain the damping characteristics without damaging the damping alloy, and further, equivalent to the conventional one without giving a load to the environment. An object is to provide a seismic isolation device having the above-described vibration damping characteristics.

A seismic isolation device according to claim 1 is a laminate in which elastic plates having elasticity and hard plates having rigidity are alternately laminated, and
A plurality of damping alloys respectively arranged between the hard plates in line with the elastic plates;
It is characterized by having.

The operation of the seismic isolation device according to claim 1 will be described below.
According to the seismic isolation device of this claim, an elastic plate having elasticity and a hard plate having rigidity are alternately laminated to form a laminated body, and a plurality of damping alloys are arranged side by side with the elastic plate. It is the structure each arrange | positioned between hard boards. Therefore, according to the seismic isolation device according to the present claim, when an earthquake occurs, the combined action between the elastic plate of the laminated body and the plurality of damping alloys that are arranged in parallel with each other and deformed respectively. This attenuates and reduces the earthquake vibration, making it difficult to transmit the earthquake vibration to the building.

  That is, in this claim, as an earthquake occurs and a large horizontal repetitive displacement due to the earthquake is input to the seismic isolation device as a seismic wave, the elastic plate of the laminated body and the plurality of damping alloys are input to this displacement. By transforming together, the earthquake shake is attenuated and reduced. However, even if a large seismic wave input, which is a repetitive displacement, is applied to the seismic isolation device, in this claim, a plurality of damping alloys are arranged in a form aligned with the elastic plate between the hard plates. Since they are originally separated from each other by the hard plate, the damping alloy is not damaged by the inner peripheral surface of the laminated plate, and the damping characteristics can be sufficiently maintained.

  As described above, according to the seismic isolation device of the present claim, since the vibration damping characteristics can be sufficiently maintained, the vibration damping performance can be sufficiently and stably exhibited, and the vibration of the earthquake can be reduced over a long period of time. Accordingly, according to the present claims, the safety of the building is improved over a long period of time as a result that the shaking due to the earthquake is reliably attenuated for a long time and the shaking is not directly transmitted to the building side.

The operation of the seismic isolation device according to claim 2 will be described below.
The present invention has the same configuration as that of the first embodiment and operates in the same manner, but further has a configuration in which the damping alloy is formed of a superplastic metal. In other words, in this claim, a superplastic metal having a large elongation until fracture, which is the amount of plastic deformation, is adopted as the damping alloy, so that excellent damping characteristics can be obtained without using lead material as the damping alloy. Be able to. For this reason, in the event of an earthquake, it has come to have vibration control characteristics equivalent to or better than those of conventional seismic isolation devices without imposing a burden on the environment.

The effect | action of the seismic isolation apparatus which concerns on Claim 3 is demonstrated below.
This claim has the same configuration as that of claim 2 and operates in the same manner, but further has a configuration in which the superplastic metal is a zinc-aluminum alloy. In other words, by using a zinc-aluminum-based alloy that does not contain lead as a superplastic metal, good damping characteristics can be obtained while eliminating lead as a damping alloy more reliably. .

The effect | action of the seismic isolation apparatus which concerns on Claim 4 is demonstrated below.
This claim has the same configuration as that of claim 1 and operates in the same manner, but further has a configuration in which the damping alloy is formed of a twinned metal material.

  In other words, in this claim, as the damping alloy is formed of a twinned metal material, when a tensile force or a shearing force is applied, the spring constant is lowered and the damping coefficient is increased, so that the conventional damping alloy is increased. It has large damping characteristics equivalent to or better than vibration alloys. For this reason, in the event of an earthquake, it has come to have vibration control characteristics equivalent to or better than those of conventional seismic isolation devices without imposing a burden on the environment.

The operation of the seismic isolation device according to claim 5 will be described below.
In this claim, it has the same structure as that of claim 4 and acts in the same way, but further, Cu—Al—Mn alloy, Mg—Zr alloy, Mn—Cu alloy, Mn—Cu—Ni—Fe alloy, Cu -Al-Ni alloy, Ti-Ni alloy, Al-Zn alloy, Cu-Zn-Al alloy, Mg alloy, Cu-Al-Co alloy, Cu-Al-Mn-Ni alloy, Cu-Al-Mn-Co alloy , Cu-Si alloy, Fe-Mn-Si alloy, Fe-Ni-Co-Ti alloy, Fe-Ni-C alloy, Fe-Cr-Ni-Mn-Si-Co alloy, Ni-Al alloy, SUS304 Any one of the above is used as a twinned metal material.

  In other words, any one of these metals is used as a twinned metal material for forming a damping alloy, so that it has a damping characteristic equal to or higher than that of the conventional one without giving a load to the environment. A vibration alloy can be obtained more reliably.

The operation of the seismic isolation device according to claim 6 will be described below.
The present invention has the same configuration as that of the first embodiment and operates in the same manner, but further has a configuration in which a plurality of damping alloys are arranged in a straight line in the laminated body. . In other words, in the present claim, since a plurality of damping alloys are arranged in a straight line in the laminated body, a plurality of elastic plates can be made into the same shape with each other when manufacturing the seismic isolation device, Along with this, the workability is improved, so that the manufacturing cost of the seismic isolation device is reduced.

The operation of the seismic isolation device according to claim 7 will be described below.
The present invention has the same configuration as that of the first embodiment and operates in the same manner, but further has a configuration in which a plurality of damping alloys are arranged on the same surface in the laminate. In other words, in this claim, by arranging multiple damping alloys on the same surface in the laminated body, the function to attenuate the shaking of the earthquake due to the damping alloy is enhanced, and the shaking of the earthquake is more reliably transmitted to the building side. It becomes difficult to be done.

The operation of the seismic isolation device according to claim 8 will be described below.
The present invention has the same structure as that of the first aspect and operates in the same manner. Further, the laminated body and the plurality of damping alloys are each formed in a cylindrical shape, and the plurality of damping alloys are formed inside the laminated body. Is arranged.

  That is, in this claim, a plurality of damping alloys respectively disposed between the hard plates in a line with the elastic plate are also formed in a cylindrical shape and disposed inside the cylindrical laminate. It is supposed to be a form. For this reason, since each is made into a cylindrical shape, even if the seismic isolation device is shaken from any direction, there is no change in the damping characteristics of the seismic isolation device, and the seismic shaking is more reliably performed. Attenuates and decreases. On the other hand, since the damping alloy is arranged in the cylindrical laminated body, according to this claim, it contributes to space saving of the seismic isolation device.

  As described above, according to the above-described configuration of the present invention, not only has an excellent effect of providing a seismic isolation device that can sufficiently maintain the damping characteristics without damaging the damping alloy, but also has an impact on the environment. It has the outstanding effect that it can provide the seismic isolation device which has the vibration control characteristic equivalent to the past, without giving.

  1st Embodiment of the seismic isolation apparatus which concerns on this invention is described based on FIGS. As shown in FIG. 1, the upper and lower portions of the seismic isolation device 10 according to the present embodiment are constituted by connecting plates 12 and 14 each formed in a disc shape. The lower connecting plate 12 is in contact with the ground, and the upper connecting plate 14 is in contact with the lower part of the building.

  Further, an outer laminated body 16 that is a laminated body formed in a cylindrical shape is disposed between the pair of connecting plates 12 and 14. The outer laminated body 16 has a rubber ring 18 made of a ring by having a through hole 18A in the center portion shown in FIG. 2, and a metal plate 20 made of a metal formed in a disk shape. A plurality of sheets are alternately arranged to form a cylindrical structure. That is, in the present embodiment, the rubber ring 18 is an elastic plate that can be elastically deformed, and the metal plate 20 is a hard plate for maintaining rigidity.

  On the other hand, the pair of connecting plates 12 and 14 are attached to the upper and lower ends of the outer laminate 16 by vulcanization bonding. In addition, circular through holes 12A and 14A are formed at the centers of the pair of connecting plates 12 and 14, respectively, and screw holes bolt holes 12B and 12B are provided on the outer peripheral sides of the pair of connecting plates 12 and 14, respectively. 14B is formed.

  Furthermore, in each space in each rubber ring 18 partitioned by the metal plate 20 at the center of the outer laminate 16, a damping alloy formed in a cylindrical shape by a superplastic metal, which is a zinc-aluminum alloy. 22 is fitted in each. As a result, the damping alloy 22 is arranged alongside the rubber ring 18 between the metal plates 20 so that a plurality of damping alloys 22 are arranged in a straight line in the outer laminate 16. Yes.

  However, the concave portions 20A are respectively provided on both sides of the metal plate 20 corresponding to the through holes 18A of the respective rubber rings 18, and both end portions of the respective damping alloys 22 are respectively fitted into the concave portions 20A for positioning. Has been. As described above, in the seismic isolation device 10 according to the present embodiment, a plurality of damping alloys 22 made of superplastic metal are respectively arranged in the rubber ring 18 that is the inside of the outer laminate 16 that can be elastically deformed. It has a structure.

Next, the effect | action of the seismic isolation apparatus 10 which concerns on this Embodiment is demonstrated below.
According to the seismic isolation device 10 of the present embodiment, the outer laminated body 16 is formed in a cylindrical shape by alternately laminating the elastic rubber rings 18 and the rigid metal plates 20. In addition, a plurality of damping alloys 22 each formed in a cylindrical shape are arranged between the metal plates 20 in a line with the rubber ring 18, so that the plurality of damping alloys 22 are arranged on the outer laminate 16. The structure is arranged in a straight line inside.

  Therefore, according to the seismic isolation device 10 according to the present embodiment, when an earthquake occurs, the rubber ring 18 of the outer laminated body 16 and the plurality of damping alloys 22 that are arranged in parallel and deformed in parallel with each other, respectively. The combined action between the two will attenuate and reduce the earthquake vibration, making it difficult to transmit the earthquake vibration to the building.

  That is, in the present embodiment, as the earthquake occurs and a large horizontal displacement X in the horizontal direction due to the earthquake is input to the seismic isolation device 10 as a seismic wave, as shown in FIG. In addition, the plurality of damping alloys 22 are deformed in accordance with the input of the displacement, so that the shaking of the earthquake is attenuated and reduced.

  However, even if a large seismic wave input with repetitive displacement is applied to the seismic isolation device 10, in this embodiment, the plurality of damping alloys 22 are arranged in parallel with the rubber rings 18 between the metal plates 20. Since the vibration damping alloys 22 are originally separated from each other by the metal plate 20, the vibration damping alloy 22 is not damaged by the inner peripheral surface of the laminated plate, and the vibration damping characteristics can be sufficiently maintained.

  As described above, according to the seismic isolation device 10 of the present embodiment, the vibration damping characteristics can be sufficiently maintained, so that the vibration damping performance can be sufficiently and stably exhibited and the vibration of the earthquake can be reduced over a long period of time. . Along with this, according to the present embodiment, the safety of the building is improved over a long period of time as a result that the shaking due to the earthquake is reliably attenuated for a long time and the shaking is not directly transmitted to the building side.

  On the other hand, in the present embodiment, a damping alloy is formed of a superplastic metal that is a zinc-aluminum alloy. That is, in the present embodiment, a zinc-aluminum alloy that does not contain lead material is adopted as the damping alloy 22 even among superplastic metals that have a large amount of elongation until fracture, which is the amount of plastic deformation. Good vibration damping characteristics can be obtained without using a lead material as the vibration alloy 22. For this reason, in the event of an earthquake, it has come to have vibration control characteristics equivalent to or better than those of conventional seismic isolation devices without imposing a burden on the environment.

  Furthermore, in the present embodiment, since the plurality of damping alloys 22 are arranged in a straight line in the outer laminated body 16, when the seismic isolation device 10 is manufactured, the plurality of rubber rings 18 are mutually connected. Since the same shape can be obtained, and the workability is improved accordingly, the manufacturing cost of the seismic isolation device 10 is reduced.

  In the present embodiment, a plurality of damping alloys 22 respectively arranged between the metal plates 20 in a line with the rubber ring 18 are also cylindrical in the outer laminated body 16 formed in a cylindrical shape. Since it is formed and arranged, even if a vibration is applied to the seismic isolation device 10 from any direction, there is no change in the damping characteristics of the seismic isolation device 10 and the seismic vibration is further increased. It becomes possible to attenuate and reduce reliably. On the other hand, since the damping alloy 22 is disposed in the cylindrical outer laminate 16, according to the present embodiment, it contributes to space saving of the seismic isolation device 10.

Next, a second embodiment of the seismic isolation device according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the member same as the member demonstrated in 1st Embodiment, and the duplicate description is abbreviate | omitted.
In the present embodiment, as in the first embodiment, the outer laminated body 16 is formed by alternately laminating rubber rings 18 and metal plates 20, and the metal plates 20 are arranged side by side with the rubber rings 18. The vibration damping alloys 22 are respectively disposed in the outer laminated body 16 so that the plurality of vibration damping alloys 22 are linearly arranged in the outer laminated body 16.

  However, the damping alloys 22 are not only arranged in a single row, but in the present embodiment, as shown in FIG. 4, a plurality of damping alloys 22 are arranged on the same surface in the outer laminate 16. Thus, the damping alloy 22 is arranged in a plurality of rows.

  As described above, in the present embodiment, not only the same effect as in the first embodiment is exhibited, but also the outer laminated body is obtained by arranging a plurality of damping alloys 22 on the same surface in the outer laminated body 16. A plurality of vibration damping alloys 22 are arranged in a plurality of lines in a straight line in 16. For this reason, when manufacturing the seismic isolation device 10, the plurality of rubber rings 18 can have the same shape as each other, not only the workability is increased and the manufacturing cost of the seismic isolation device 10 is reduced, but there are also a plurality of rows. The damping alloy 22 enhances the function of attenuating earthquake vibrations, making it difficult to reliably transmit earthquake vibrations to the building side.

  In each of the above embodiments, a superplastic metal made of a zinc-aluminum alloy (Zn-22% Al (eutectoid)) is used as the metal material for the damping alloy, but an aluminum-copper alloy (Al-- 33% Cu (eutectic)) superplastic metal may be employed, and other types of superplastic metal may be employed as the damping alloy.

  On the other hand, in each of the above embodiments, a superplastic metal is adopted as the metal material for the damping alloy, but a twinned metal material may be adopted as the metal material for the damping alloy. In other words, when a damping alloy is formed of twinned metal materials, when a tensile force or shear force is applied, the spring constant decreases and the damping coefficient increases, which is equal to or higher than that of conventional damping alloys. It has a great vibration damping characteristic. For this reason, in the event of an earthquake, it has vibration control characteristics equivalent to or higher than those of conventional seismic isolation devices without imposing a load on the environment.

  Further, as twinned metal materials, for example, Cu-Al-Mn alloy, Mg-Zr alloy, Mn-Cu alloy, Mn-Cu-Ni-Fe alloy, Cu-Al-Ni alloy, Ti-Ni alloy, Al -Zn alloy, Cu-Zn-Al alloy, Mg alloy, Cu-Al-Co alloy, Cu-Al-Mn-Ni alloy, Cu-Al-Mn-Co alloy, Cu-Si alloy, Fe-Mn-Si alloy It is conceivable to employ any one of Fe-Ni-Co-Ti alloy, Fe-Ni-C alloy, Fe-Cr-Ni-Mn-Si-Co alloy, Ni-Al alloy, and SUS304.

  In other words, any one of these metals is adopted as a twinned metal material for forming a damping alloy, so that it has a damping characteristic equal to or higher than that of the conventional one without giving a load to the environment. A vibration alloy can be obtained more reliably.

  For example, when a manganese-based alloy such as an Mn—Cu alloy or an Mn—Cu—Ni—Fe alloy is used, it is held at a temperature of 800 ° C. to 930 ° C. for about 0.5 to 2 hours for 10 hours. And then slowly cooling for about 20 hours to obtain a twinned metal material.

  Also, Cu-Al-Mn alloy, Cu-Al-Ni alloy, Cu-Zn-Al alloy, Cu-Al-Co alloy, Cu-Al-Mn-Ni alloy, Cu-Al-Mn-Co alloy, Cu- When using a copper-based alloy such as Si alloy, hold at a temperature of about 900 ° C. for about 5 minutes to 1 hour, rapidly cool, then reheat to a temperature of about 200 ° C. for about 15 to 30 minutes By holding, a twinned metal material can be obtained.

Next, the deformation mechanism of the damping alloy by using twins will be described below.
By applying stress from the lateral direction to the martensite phase in which the metal atoms shown in FIG. 5 (A) are uniformly aligned, deformation starts as shown in FIG. 5 (B). Further, when the stress continues to be applied, the shape is deformed as shown in FIG. In the state shown in FIG. 5C, the deformation amount of the dimension S is generated.

  In contrast, in the general metal shown in FIG. 6A, the atoms are uniformly aligned, but when stress is applied from the lateral direction, the atoms are not aligned as shown in FIG. 6B. Occurs and a defect occurs. That is, when a deviation occurs in the arrangement of atoms in a general metal, plastic deformation occurs. Therefore, once the state shown in FIG. 6B is reached, the state shown in FIG. 6A is not restored. .

  As described above, unlike a general metal, a twinned metal material starts deformation with a relatively small stress, but does not undergo plastic deformation even when deformed to the state shown in FIG. If the reverse is applied, the state returns to the state shown in FIG. Furthermore, by reducing the cross-sectional area of the twin metal material so that the deformation is generated from the stage where the stress applied to the whole is low, the spring constant of hysteresis in the stress strain curve applied to the entire is not increased.

  In each of the above embodiments, a superplastic metal or twinned metal material is used as the damping alloy, but other general metal materials other than these may be used. On the other hand, in each of the above embodiments, the ratio of the cross-sectional area of the damping alloy to about 20% with respect to the cross-sectional area of the portion corresponding to the damping alloy of the seismic isolation device is arranged in parallel with each other. Since the seismic vibration can be reduced most by the combined action between the elastic plate and the damping alloy that are deformed, it is conceivable that this ratio is set to about 20%.

It is the perspective view which fractured | ruptured partially the seismic isolation apparatus which concerns on the 1st Embodiment of this invention. It is a principal part expanded sectional view of the seismic isolation apparatus which concerns on the 1st Embodiment of this invention. It is a principal part expanded sectional view of the seismic isolation apparatus which concerns on the 1st Embodiment of this invention, Comprising: It is a figure which shows the state into which the horizontal displacement was input. It is a perspective view of the state where a seismic isolation device concerning a 2nd embodiment of the present invention was partially fractured, and an upper connecting plate was removed. It is explanatory drawing showing the atomic arrangement | sequence of the damping alloy which concerns on embodiment of this invention, Comprising: (A) is a figure showing a martensitic phase, (B) represents the state which the deformation | transformation started in the martensitic phase. It is a figure and (C) is a figure showing the state which the deformation | transformation of the martensite phase was finished. It is explanatory drawing showing the atomic arrangement | sequence of a general metal, Comprising: (A) is a figure showing the state in which the atom was arranged uniformly, (B) represents the state which the shift | offset | difference produced in a part of arrangement | sequence of an atom. FIG. It is the partially broken perspective view of the seismic isolation apparatus which concerns on a prior art.

Explanation of symbols

10 Seismic isolation device 16 Outer laminate (laminate)
18 Rubber ring (elastic plate)
20 Metal plate (hard plate)
22 Damping alloy

Claims (8)

A laminate in which elastic plates having elasticity and rigid plates having rigidity are alternately laminated;
A plurality of damping alloys respectively arranged between the hard plates in line with the elastic plates;
A seismic isolation device characterized by comprising:   The seismic isolation device according to claim 1, wherein the damping alloy is made of a superplastic metal.   The seismic isolation device according to claim 2, wherein the superplastic metal is a zinc-aluminum alloy.   The seismic isolation device according to claim 1, wherein the damping alloy is made of a twinned metal material.   Cu-Al-Mn alloy, Mg-Zr alloy, Mn-Cu alloy, Mn-Cu-Ni-Fe alloy, Cu-Al-Ni alloy, Ti-Ni alloy, Al-Zn alloy, Cu-Zn-Al alloy, Mg alloy, Cu-Al-Co alloy, Cu-Al-Mn-Ni alloy, Cu-Al-Mn-Co alloy, Cu-Si alloy, Fe-Mn-Si alloy, Fe-Ni-Co-Ti alloy, Fe 5. An exemption according to claim 4, wherein any one of -Ni-C alloy, Fe-Cr-Ni-Mn-Si-Co alloy, Ni-Al alloy and SUS304 is used as a twinned metal material. Seismic device.   The seismic isolation device according to claim 1, wherein the plurality of damping alloys are arranged in a straight line in the laminated body.   The seismic isolation device according to claim 1, wherein a plurality of damping alloys are arranged on the same surface in the laminate. 2. The seismic isolation device according to claim 1, wherein the laminated body and the plurality of damping alloys are each formed in a cylindrical shape, and the plurality of damping alloys are arranged inside the laminated body.

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