JP2019094635A - Base-isolation structure - Google Patents

Abstract

To provide a base-isolation structure excellent in an appearance, capable of easily executing construction, and capable of reducing a horizontal directional quake inputted by an earthquake.SOLUTION: A base-isolation structure 1 is constituted of a lower structure part 2, an upper structure part 3 supported by the lower structure part 2 and a base-isolation device 4 interposed between the lower structure part 2 and the upper structure part 3, the base-isolation device 4 is constituted of a sliding bearing 5 and a restoring bearing 6 flexibly deforming in the horizontal direction, the sliding bearing 5 is constituted of a pair of upper-lower sliding members, and both of the lower side sliding member arranged on the peripheral edge of a base of the lower structure part and the upper side sliding member opposed to this, are constituted of a triangular plate-like body being the substantially same in a shape and a size.SELECTED DRAWING: Figure 1

Description

The present invention relates to a seismic isolation structure used for a building, a bridge, etc., and can reduce the horizontal vibration inputted by an earthquake.

  2. Description of the Related Art A seismic isolation structure is conventionally applied to a structure such as a building or a bridge in order to improve its seismic performance.

  As such a seismic isolation structure, by installing a seismic isolation device between the lower structure on the foundation side of the structure and the upper structure on which the structure is constructed, the seismic isolation device is deformed when an earthquake or the like occurs. It is known to displace or absorb energy, to dampen vibrations in the superstructure and to apply a restoring force to the superstructure.

  For example, in Japanese Patent Application Laid-Open No. 2007-262691 (Patent Document 1), it is possible to set a wide range in which the upper and lower plates slide relative to each other with a minimum configuration including a plate-like upper slide plate and a lower slide plate. A seismic isolation structure has been proposed that can exhibit a wide range of seismic isolation functions by its structure.

This seismically isolated structure is equipped with a sliding bearing to be attached between the housing structure and the foundation,
A plurality of rows of wooden foundations installed on the foundations are arranged side by side, and transverse members of a plurality of the housing structures are placed in a crossing direction of the rows of foundations;
An upper slide plate provided with a downward sliding surface mounted along the longitudinal direction of the horizontal member;
And a lower slide plate provided with an upward slide surface mounted along the longitudinal direction of the base,
It is attached so that the intersection of the upper slide plate and the lower slide plate may coincide with the column axis of the housing structure.

Unexamined-Japanese-Patent No. 2007-262691 (Claim, FIG. 1)

In the seismic isolation structure disclosed in Patent Document 1, the housing structure as the upper structure and the base as the lower structure are displaced in a predetermined movable range because their positions are displaced when a vibration occurs. In consideration of this movable range, the base needs to be larger than the housing structure.
Therefore, in a state where no vibration occurs, the base pops out, which is not preferable in appearance.

  Furthermore, in the seismic isolation structure disclosed in Patent Document 1, it is necessary to provide a base on the base.

SUMMARY OF THE INVENTION In view of such a present situation, the present invention aims to provide a seismic isolation structure which has a good appearance and can be easily installed, and can reduce horizontal vibration input by earthquakes. It is a thing.

That is, the invention according to claim 1 of the present invention is
A seismic isolation structure comprising a lower structure, an upper structure supported by the lower structure, and a seismic isolation device interposed between the lower structure and the upper structure,
The lower structure has a foundation,
The upper structure comprises a floor or bottom plate of plate material of a required size,
The seismic isolation device is composed of a sliding bearing and a restoring bearing that elastically deforms in the horizontal direction,
The slide bearing comprises a lower slide member disposed at the periphery of the foundation, and an upper slide member disposed at a position on the lower surface of the floor or bottom plate opposite to the lower slide member.
The restoration bearing is configured such that its upper end is connected to the floor or bottom plate and its lower end is connected to the base.
The upper slide member can slide relative to the lower slide member,
The lower slide member disposed on the periphery of the foundation and the upper slide member opposed thereto are both formed of a triangular plate having substantially the same shape and size. Isolation structure.

The invention described in claim 2 of this invention is
In the seismic isolation structure according to claim 1,
The basis is
It is characterized in that it is composed of a foundation bottom and a rising portion formed on its peripheral edge so as to rise upward.

The invention described in claim 3 of this invention is
In the seismic isolation structure according to claim 1,
The plate material is
It is characterized in that it is made of a material having a bending strength of 0.5 N / mm ² or more.

The invention described in claim 4 of this invention is
In the seismic isolation structure according to claim 1,
The seismic isolation structure is
For wooden buildings,
The plate material is
It is characterized by being composed of wood having a bending strength of 0.5 N / mm ² or more.

The invention according to claim 5 of this invention is
In the seismic isolation structure according to claim 1,
The seismic isolation structure is
For wooden buildings,
The plate material is
It is characterized in that it is composed of CLT.

The invention described in claim 6 of this invention is
In the seismic isolation structure according to claim 1,
The lower slide member is
Furthermore, it is also arranged at the center of the foundation,
The lower slide member disposed at the center of the foundation and the upper slide member opposed thereto are constituted by a plate-shaped body having a square shape on one side, and the plate-shaped body having a square shape having a length in the longitudinal direction on the other side. It is characterized in that it is constituted by a rectangular rod-like body substantially identical to the diagonal of.

The invention according to claim 7 of this invention is
In the seismic isolation structure according to claim 2,
The seismic isolation structure is
No base is provided between the upper structure portion and the rising portion;
The lower slide member is
It is characterized in that it is disposed directly on the upper surface of the rising portion.

The invention according to claim 8 of this invention is
In the seismic isolation structure according to any one of claims 1 to 7,
The restoration bearing is
It is characterized in that it is made of laminated rubber in which steel plates and rubber are alternately laminated.

The seismic isolation structure according to the present invention comprises a lower structure, an upper structure supported by the lower structure, and a seismic isolation device interposed between the lower structure and the upper structure. The base isolation device includes a slide bearing and a restored bearing that elastically deforms in the horizontal direction, and the slide bearing is a lower slide member disposed on the periphery of the foundation of the lower structure, and An upper slide member is disposed on the lower surface of the floor or bottom plate of the upper structure portion so as to be opposed to the lower slide member, and the restoration support is provided on the floor or bottom plate of the upper structure portion. The lower end is connected to the foundation of the lower structure.
In the seismic isolation structure, the upper slide member is configured to be slidable relative to the lower slide member, and the lower slide member disposed on the periphery of the foundation and the upper slide relative to the lower slide member. Each member is formed of a triangular plate-like body having substantially the same shape and size.
Therefore, in the seismic isolation structure of the present invention, the sliding bearing stably slides while at least a part of the sliding bearings constantly abut each other in the movable range of the seismic isolation device. The function can be exhibited sufficiently and stably.
Furthermore, with regard to the above-mentioned seismic isolation structure, its construction is very easy and low cost since its structure is simple and reasonable.

In the above-mentioned seismic isolation structure, a plate material which constitutes a floor or a bottom plate of the upper structure portion can be made of a material having a bending strength of 0.5 N / mm ² or more.
With such a configuration, it is not necessary to provide a base, a large pull, a joist, a floor base, an underfloor heat insulating material and the like on the foundation constituting the lower structure, and the number of lower slide members can be reduced. It is possible to reduce.

In the seismic isolation structure, the lower slide member is further disposed at the center of the foundation, and the lower slide member disposed at the center of the foundation and the upper slide member opposed thereto are one side. Can be constituted by a rectangular plate-like body, and the other can be constituted by a rectangular rod-like body whose length in the longitudinal direction is substantially the same as the diagonal of the rectangular plate-like body.
With such a configuration, the upper structure is supported in a more stable state, and is stable while at least a part of the sliding bearings always abut each other in the movable range of the seismic isolation device. It becomes possible to slide.

The said seismic isolation structure can be preferably applied to a wooden building, and preferably wood, more preferably CLT (stacked board) can be selected as a material constituting the plate material.

It is explanatory drawing which shows an example of the seismic isolation structure concerning this invention. It is a cross-sectional view of the seismic isolation structure of FIG. It is A-A 'sectional drawing of the seismic isolation structure of FIG. It is explanatory drawing which shows the movable state of the seismic isolation apparatus in the seismic isolation structure of FIG. 1, Comprising: (A) shows a state when vibration is given toward upper left, (B) is a lower right It shows the state when the vibration is given toward the

Hereinafter, the configuration of an embodiment of the seismic isolation structure of the present invention will be described with reference to the drawings.
The present invention is not limited to the embodiment shown in the drawings, and various improvements can be made without departing from the scope of the invention.

  The base isolation structure 1 according to the present invention is suitable for a wooden building, particularly a lightweight wooden building, and as shown in FIG. 1, an upper portion supported by a lower structure 2 and the lower structure 2 It comprises a structural portion 3 and a seismic isolation device 4 interposed between the lower structural portion 2 and the upper structural portion 3.

As shown in FIG. 1, the lower structure portion 2 is mainly composed of a foundation 21. The foundation 21 is composed of a foundation bottom plate 21a constituting the bottom surface thereof and rising portions 21b raised from the peripheral edge thereof. It is done.
In this embodiment, the rising portions 21b are formed so as to project inward in accordance with the shape of the lower sliding member 52a at the positions where the lower sliding members 52a other than the four corners are disposed. It has a projection 21c.

  Furthermore, in this embodiment, the base bottom plate 21a has rising portions 21d formed on the intersections of the diagonal lines, that is, at the center, in accordance with the shape of the lower sliding member 53a.

In FIG. 1, the upper structure portion 3 is a structure such as a building, which is disposed on the upper portion of the lower structure portion 2, and includes a floor, a column, a beam, a wall, and the like.
In this embodiment, as shown in FIG. 1, the upper structure portion 3 has a floor 31 made of a rectangular plate material having one or more required sizes and thicknesses, and a beam or a column is attached thereto. Etc. are attached and it is constructed as a building.

The plate material can be made of a material having a predetermined bending strength, such as an integrated plate.
The flexural strength may be measured according to JIS A 1408, the value is preferably 0.5 N / mm ² or more, more preferably 0.5~400N / mm ^2, more preferably 1~400N / Mm < ² >, More preferably, it is 7-100 N / mm < ² >.
When the plate material is made of the material having the predetermined strength, the outer periphery of the foundation 21 constituting the lower structure portion 2 protrudes from the outer periphery of the floor 31 constituting the upper structure portion 3. Because it does not need to be configured, it has a good fit and a good appearance.
Furthermore, since lower slide members 51a and 52a to be described later can be directly disposed on the upper surface of the foundation 21 (specifically, the rising portion 21b), a foundation or a large portion can be provided on the foundation 21. It is also possible to obtain the effect that there is no need to provide a draw, a joist, a floor base, an underfloor heat insulating material and the like, and an effect that the number of lower slide members can be reduced.

  The size of the plate material may be selected according to the size of the construction and the like, and is not particularly limited.

  The thickness of the plate material is not particularly limited, but, for example, about 150 to 300 mm in thickness is selected.

The material constituting the plate material is not particularly limited as long as it has the bending strength, and it is made of, for example, any material such as stone, ceramic, concrete, resin, metal, wood and the like. May be
The plate material is preferably made of wood.

In this embodiment, a cross laminated timber (hereinafter referred to as "CLT") is used as a plate material constituting the floor 31.
There is no restriction | limiting in particular about the number of layers of the said CLT, For example, what laminated | stacked 2-6 plate-like wood can be selected.
When CLT is selected as the plate material, its flexural strength is preferably 7 to 100 N / mm ² , more preferably 7 to 60 N / mm ² .

  The seismic isolation device 4 has sliding bearings 5, 5 ... having a function of supporting a structure or device to be seismically isolated and a function of absorbing energy at the time of vibration, a structure or device of seismic isolation or the like , And a restoring bearing 6, 6 having a function (restoring ability) to return to the original position against displacement caused by vibration.

The slide bearing 5 is composed of a pair of upper and lower slide members, and as shown in FIGS. 1 and 2, lower slide members 51a, 52a, 53a fixed on the foundation 21 of the lower structure 2 And upper slide members 51b, 52b, 53b fixed to the lower surface of the floor 31 constituting the upper structural portion 3 so as to be relatively slidable with respect to the lower slide members 51a, 52a, 53a. It consists of
In this embodiment, the lower side sliding members 51a, 52a, 53a and the upper side sliding members 51b, 52b, 53b are all disposed using fixing members (not shown).

  In FIG. 1, lower slide members 51a are disposed at four corners on the rising portion 21b of the foundation 21, and lower slide members 52a are disposed between the lower slide members 51a and 51a. A lower slide member 53 a is disposed on the central rising portion 21 d of the foundation 21.

  The lower sliding members 52a and 53a do not necessarily have to be disposed, but by disposing the lower sliding members 52a and 53a according to the size of the upper structural portion 3, the upper structural portion 3 can be made more stable. It is possible to support it in a fixed state.

A gap is formed between the lower slide members 51a and 51a or between the lower slide member 51a and the lower slide member 52a.
Therefore, it is possible to ventilate using the gap.

In addition, between the lower side sliding members 51a and 51a, and between the lower side sliding member 51a and the lower side sliding member 52a, there is a predetermined distance, and the thickness of the upper and lower pair of sliding members 51a and 51b A packing having the same thickness can be provided.
The packing is configured such that the upper surface thereof is flush with the lower surface of the floor 31, so that the upper structure portion 3 can be supported in a more stable state.

  By arranging the packing between the lower slide member 51a or the lower slide member 52a at a predetermined interval, a gap is formed, and air may be passed through the gap. Good.

The lower slide member 51a is, as shown in FIGS. 1 and 2, formed of a triangular plate-like body with one vertex making a right angle of a right triangle.
In FIGS. 1 and 2, the lower sliding member 51a is formed by two intersecting sides parallel to two sides of a corner of the foundation bottom plate 21a and an oblique side connecting the ends of the two expanding sides. In a plan view, it exhibits a right-angled isosceles triangle.
That is, in FIGS. 1 and 2, the lower sliding member 51a directs the apex on the right side to the corner of the base bottom 21a on the rising portion 21b, and each of two equal sides sandwiching the right is the base bottom. It is arranged parallel to each of two sides of the corner of 21a.

The lower slide member 52a is, as shown in FIGS. 1 and 2, formed of a triangular plate-like body with one vertex making a right angle of a right triangle.
In FIGS. 1 and 2, the lower sliding member 52a is a plate-like body having a right-angled isosceles triangle shape in plan view, like the lower sliding member 51a, and the rising portion 21b of the peripheral edge of the base bottom plate 21a. On a projecting portion 21c which is formed to project inward according to the shape of the lower sliding member 52a at a predetermined position, the base side thereof is directed outward and parallel to the rising portion 21b. The apex on the right side is directed to the corner of the protrusion 21c, and the two equal sides sandwiching the right angle are disposed parallel to the two sides of the corner of the protrusion 21c. .

The lower slide members 51a and 52a are always kept in contact with the upper slide members 51b and 52b opposite to each other in the movable range X of the seismic isolation device 4 according to the size of the construction and the like. Configured
The lower sliding members 51a and 52a preferably have a length of about 300 to 900 mm and a thickness of about 3 to 10 mm.
In this embodiment, the lower sliding members 51a and 52a are formed of members having a length of 700 mm on each side and a thickness of 3 mm.

  Here, "the movable range of the seismic isolation system" refers to a range in which the seismic isolation system (in particular, the restoration support) can be displaced or deformed in the horizontal direction while supporting the vertical load of the upper structure portion. In the horizontal direction, the upper sliding member 51b can move in a sliding manner on the lower sliding member 51a.

  Furthermore, as shown in FIGS. 1 and 2, a lower sliding member 53a is disposed on a rising portion 21d formed at the center of the foundation bottom plate 21a.

In FIGS. 1 and 2, the lower sliding member 53a is formed of a rectangular rod-like body, and as described later, the length in the longitudinal direction is substantially the same as the diagonal length of the opposing upper sliding member 53b. It is configured to be
The length (width) in the short direction is not particularly limited, but can be, for example, about 300 to 900 mm.

The lower slide member is at least at the four corners on the rising portion 21b of the base 21 when the size of the structure is relatively small, in the case of a general house larger than that. It may be disposed on the four corners on the rising portion 21b of 21 and on the rising portion 21d at the center of the base bottom plate 21a.
Therefore, the number of the objects other than the four corners on the rising portion 21b of the foundation 21 and the arrangement position can be appropriately changed according to the size of the construction and the like.

Upper slide members 51 b and 52 b are disposed at positions corresponding to the lower slide members 51 a and 52 a on the lower surface of the floor 31 of the upper structure portion 3.
Since the upper slide members 51b and 52b are both made up of the plate members having substantially the same shape and size as the lower slide members 51a and 52a opposite to each other, in a state without vibration. , Completely overlapping each other.

  Further, as shown in FIGS. 1 and 2, an upper sliding member 53b formed of a rectangular plate-like body is disposed at a position on the lower surface of the floor 31 opposite to the lower sliding member 53a.

  1 and 2, the upper slide member 53b is disposed at an angle of about 45 ° with respect to each side of the floor 31 so that the sides thereof face the bottoms of the upper slide members 51b at the four corners. However, there are no particular restrictions on the direction of the arrangement.

The upper slide member 53 b is configured to maintain a state in which the upper slide member 53 b is always in contact with the opposing lower slide member 53 a within the movable range X of the seismic isolation device 4.
The upper slide member 53b is preferably configured such that the length of each side is about 300 to 900 mm and the thickness is preferably about 0.5 to 10 mm.
In this embodiment, the upper slide member 53b is formed of a member having a length of 700 mm on each side and a thickness of 3 mm.

  The pair of upper and lower slide members (the lower slide member and the upper slide member opposed thereto) are all slide members, and one slide member of the upper and lower slide members is the other slide. It is configured to be slidable relative to the moving member.

The sliding member is a combination of about 0.05 to 0.15 to prevent the isolation device from operating by a predetermined coefficient of friction, preferably a strong wind other than an earthquake, in a state where the sliding members are in contact with each other. It can be selected appropriately.
For example, a steel plate coated with a fluorine resin or the like on the surface is selected as one sliding member, and the other sliding member is formed mainly of tetrafluoroethylene resin (PTFE), polyamide resin, etc. The members can be selected.

In this embodiment, the upper sliding member is configured such that the coefficient of friction between the sliding member forming the upper sliding member and the sliding member forming the lower sliding member is about 0.13. A steel plate coated with Teflon (registered trademark) on the surface is selected as the sliding member, and a stainless steel plate is selected as the sliding member constituting the lower sliding member.
Therefore, the upper structure portion 3 is not displaced in the horizontal direction at the time of a strong wind, but the upper structure portion 3 is displaced in the horizontal direction at the time of a strong earthquake.

The pair of upper and lower slide members may be configured so that one can slide relative to the other when vibration in the horizontal direction occurs.
Therefore, the upper and lower configurations may be interchanged in the configuration described above as the embodiment.
For example, as a sliding member constituting the upper sliding member, a steel plate having a Teflon coated surface is selected, and a stainless steel plate is selected as a sliding member constituting the lower sliding member. These sliding members may be interchanged up and down, and the sliding members constituting the lower sliding member 53a are constituted by square plate-like bodies, while the sliding members constituting the opposing upper sliding member 53b May be constituted by a rectangular rod-like body.

  In addition, when CLT is selected as a plate material which comprises the said floor | bed 31, the friction coefficient between the said lower side slide members 51a, 52a, 53a is said predetermined value by smoothing-processing the lower surface. The upper slide members 51 b, 52 b and 53 b may not be disposed on the lower surface of the floor 31.

The restoration bearing 6 is connected to the lower surface of the floor 31 so that the lower end thereof is connected to the foundation bottom plate 21a via the rising portion 21e and the upper end thereof supports the upper structure portion 3; Elastically deform.
Therefore, the restoration bearing 6 exerts a function (restoration performance) to try to return to the original position with respect to the displacement caused by the vibration when the vibration occurs.

In this embodiment, the restoration support 6 is made of laminated rubber (high damping system rubber) in which steel plates and rubber are alternately laminated.
In addition, if the restoration support 6 has both a function to support the structure to be seismically isolated and a function (restoration performance) to return to the original position with respect to displacement caused by vibration, there is a special limitation. Instead, known restoration bearings such as laminated rubber formed by laminating only rubber can be used.

  In FIGS. 1 and 2, the restoration bearings 6 are disposed one by one on the intersection of the diagonals of the adjacent slide bearings 51a and 52a, but the number and the arrangement position thereof are constructed as the upper structure portion 3. It can be suitably changed according to the size etc. of the construction to be made.

  In the seismic isolation device 4 having such a configuration, as shown in FIGS. 3 to 5, the upper sliding members 51b, 52b and 53b opposite to the lower sliding members 51a, 52a and 53a have the minimum size. Even if the upper end of the restoration bearing 6 supports the vertical load of the upper structure portion 3 and at the same time at least a part of it is always in contact with each other even if it is maximally displaced in a horizontally displaceable or deformable range In the sliding bearing 5, a sliding surface is always formed.

According to the seismic isolation structure 1 having such a configuration, the seismic isolation device 4 is constituted by the sliding bearing 5 and the restoration bearing 6 consisting of the specific pair of upper and lower sliding members, so that the horizontal vibration input by the earthquake On the other hand, due to the relative displacement of the upper structural portion 3 in the horizontal direction, the vibration energy can be absorbed or attenuated by the friction generated between the upper and lower sliding members, and the upper and lower sliding members Within the movable range X of the device 4, contact with each other is always maintained, and furthermore, the position of the upper structure 3 can be easily restored by the restoring force of the restoring bearing 6.
Therefore, the seismic isolation function can be exhibited sufficiently and stably.

By installing the base isolation structure 1 configured in this way in a target building or a structure such as a bridge, it is possible to reduce the horizontal vibration that is input due to an earthquake and prevent its damage, etc. It is preferably capable of being applied to relatively light buildings, such as preferably single-family residential structures, more preferably to light wood buildings.
In addition, the said seismic isolation structure 1 can be installed in apparatuses, such as furniture, and prevention of a fall of furniture, etc. are attained by this.

The seismic isolation structure according to the present invention has a good appearance and a simple and rational configuration, which enables installation to be performed easily and also enables horizontal vibration input by an earthquake or the like. It is widely used in the construction industry as it allows for reduction.

DESCRIPTION OF SYMBOLS 1 seismic isolation structure 2 lower structure part 21 foundation 21a foundation bottom board 21b rising part 21c protrusion part 21d rising part (center side)
Reference Signs List 3 superstructure 31 floor 4 seismic isolation device 5 slide bearing 51a, 52a, 53a lower slide member 51b, 52b, 53b upper slide member 6 restored bearing X movable range

That is, the invention according to claim 1 of the present invention is
A seismic isolation structure comprising a lower structure, an upper structure supported by the lower structure, and a seismic isolation device interposed between the lower structure and the upper structure,
The lower structure has a foundation,
The upper structure comprises a floor or bottom plate of plate material of a required size,
The seismic isolation device is composed of a sliding bearing and a restoring bearing that elastically deforms in the horizontal direction,
The slide bearing comprises a lower slide member disposed at at least four corners of the periphery of the foundation, and an upper slide member disposed at a position opposite to the lower slide member on the lower surface of the floor or bottom plate. And
The restoration bearing is configured such that its upper end is connected to the floor or bottom plate and its lower end is connected to the base.
The upper slide member can slide relative to the lower slide member,
The lower slide member disposed on the periphery of the foundation and the upper slide member opposed thereto are both formed of a triangular plate having substantially the same shape and size ,
The triangular plate-like member has two intersecting sides parallel to the two sides of the corner of the foundation and an oblique side connecting the respective ends of the two expanding sides, and is a rectangular isosceles in plan view It is a seismic isolation structure characterized in that it is configured to present a triangle .

Claims (8)

A seismic isolation structure comprising a lower structure, an upper structure supported by the lower structure, and a seismic isolation device interposed between the lower structure and the upper structure,
The lower structure has a foundation,
The upper structure comprises a floor or bottom plate of plate material of a required size,
The seismic isolation device is composed of a sliding bearing and a restoring bearing that elastically deforms in the horizontal direction,
The slide bearing comprises a lower slide member disposed at the periphery of the foundation, and an upper slide member disposed at a position on the lower surface of the floor or bottom plate opposite to the lower slide member.
The restoration bearing is configured such that its upper end is connected to the floor or bottom plate and its lower end is connected to the base.
The upper slide member can slide relative to the lower slide member,
The lower slide member disposed on the periphery of the foundation and the upper slide member opposed thereto are both formed of a triangular plate having substantially the same shape and size. Seismic isolation structure. The basis is
The seismic isolation structure according to claim 1, characterized by comprising a foundation bottom and a rising portion formed on the peripheral edge thereof so as to rise upward. The plate material is
The seismic isolation structure according to claim 1, characterized in that it is made of a material having a bending strength of 0.5 N / mm ² or more. The seismic isolation structure is
For wooden buildings,
The plate material is
The seismic isolation structure according to claim 1, characterized in that it is made of wood having a bending strength of 0.5 N / mm ² or more. The seismic isolation structure is
For wooden buildings,
The plate material is
The seismic isolation structure according to claim 1, characterized in that it is made of CLT. The lower slide member is
Furthermore, it is also arranged at the center of the foundation,
The lower slide member disposed at the center of the foundation and the upper slide member opposed thereto are constituted by a plate-shaped body having a square shape on one side, and the plate-shaped body having a square shape having a length in the longitudinal direction on the other side. The seismic isolation structure according to claim 1, characterized in that it is constituted by a rectangular rod-like body that is substantially identical to the diagonal line of. The seismic isolation structure is
No base is provided between the upper structure portion and the rising portion;
The lower slide member is
The seismic isolation structure according to claim 2, wherein the seismic isolation structure is disposed directly on the upper surface of the rising portion. The restoration bearing is
The seismic isolation structure according to any one of claims 1 to 7, which is made of laminated rubber in which steel plates and rubber are alternately laminated.

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