JP6667908B2 - Seismic isolation structure and seismic isolation wooden building - Google Patents

Description

  The present invention relates to a seismic isolation structure and a seismic isolation wooden building, and more particularly, to a seismic isolation structure comprising a timber frame assembling a timber supporting a building with wood as an aggregate, and a seismic isolation device having the same. Related to wooden buildings.

Japan is an earthquake country and is always threatened by the fear of a major earthquake. When a major earthquake occurs, many buildings are not only collapsed or partially destroyed, but also the transportation facilities such as roads and other transportation networks, which are essential for daily life, and the infrastructure facilities such as electricity, water, gas, etc. collapse, and the local community is destroyed. Into havoc.
Structures and construction methods for preventing or reducing the collapse of buildings in response to this earthquake have been developed. These structures include, for example, an earthquake-resistant structure (a structure in which the building itself is stiffened by inserting reinforcing materials to strengthen walls and columns to resist vibration), and a vibration damping structure (a vibration reduction device in the building) A structure to absorb seismic energy, make the building sticky and suppress vibration, and a seismic isolation structure (a seismic isolation device is installed between the building and the ground to insulate the building from the ground, Structure that does not transmit vibration).

Of these, the seismic isolation structure has the advantage of further reducing the shaking in the building. In other words, the seismic isolation device is embedded in the foundation, and this seismic isolation device absorbs intense seismic energy, changes it to gentle rolling, and has the advantage of minimizing damage such as falling furniture. is there.
Since this seismic isolation structure has the above-mentioned advantages, research and development of seismic isolation devices and construction methods for high-rise buildings have been mainly conducted so far, and currently, high-rise buildings in major cities and important public facilities are being used. Has been adopted.
In Japan, the majority of housing is wooden, so seismic isolation of wooden houses is generally difficult to construct, light in weight and ineffective, and overall costs including construction costs are high. It is said that it is difficult to spread because it becomes, so far, the approach to it has been delayed.
However, in recent years, housing manufacturers and industry-academia joint projects have been researching and developing seismic isolation devices and construction techniques for general wooden houses, and have begun to be adopted in some houses, such as prefabricated houses. The results of research and development are also introduced in patent literature.

For example, Patent Literature 1 (Japanese Patent No. 3829115) describes a seismic isolation structure.
This seismic isolation structure includes a lower structure installed on the ground, a flat frame located above the lower structure, a seismic isolation device interposed between the lower structure and the horizontal frame, An upper structure located above the frame, wherein the planar frame is made of steel, wooden, or reinforced concrete, and has a structure reinforced with a fire-hitting member.

Patent Document 2 (Japanese Patent Application Laid-Open No. 2008-266958) described below describes a wooden house base made of a laminated material.
As shown in FIG. 8, this wooden house mount has the base 1 supported on the foundation 2 via a plurality of small seismic isolation devices 3, the mount is assembled from wood, and at least the periphery thereof is formed of a plurality of conifers. It consists of the laminated material which consists of. That is, the gantry 1 is assembled into a hollow polygonal shape or a frame shape by a plurality of woods (for example, pulling pulls and joists) 5 and fasteners, and these woods 5 are formed by stacking a plurality of conifers. In addition, the gantry 1 is configured such that mounting plates 4 for seismic isolation devices are mounted on a plurality of corners and corners on the lower surface.
The gantry 1 is provided with wooden reinforcements 6 each having a substantially triangular plane at four corners, and these are fitted via fasteners including bolts to prevent deformation.

Further, Patent Document 3 (Japanese Patent No. 4491004) describes a similar wooden housing base.
This wooden house gantry is an improvement of the gantry described in Patent Document 2 described above, and the gantry combines a frame wood and a plurality of vertical and horizontal woods, and forms a hollow region between the frame wood and the plurality of vertical and horizontal woods. A plurality of beam lumbers are erected horizontally, vertically, horizontally and diagonally in this hollow area.These beams improve the tensile strength in the event of an earthquake, suppress the deformation of the gantry, and construct The structure has been reduced in cost.

Japanese Patent No. 3827115 JP 2008-266958 A Japanese Patent No. 4103545

The seismic isolation structures described in Patent Literatures 1 to 3 are all based on a foundation built on the ground, a gantry located on the foundation and supporting the building, and interposed between the gantry and the gantry. It is composed of a plurality of members such as seismic isolation devices that exert a seismic isolation function.
Among these members, the flat frame of Patent Document 1, that is, the gantry is made of any one of a steel frame, a wooden structure, and a reinforced concrete structure.
In these gantry, the reinforced concrete gantry is made of concrete slab (floor slab), so the method of construction is to first make the formwork, and then to arrange the reinforcing bars, drive in the concrete, remove the formwork, etc. These operations are troublesome and troublesome, and as a result, there are problems such as a long construction period, heavy weight, and low cost.
In addition, a steel frame is a custom-made product to a metalworking specialty manufacturer, and the product is more expensive than a reinforced concrete frame, including material costs and processing costs.
In addition, wooden gantry (hereinafter referred to as wooden gantry) has problems in tightening with seismic isolation device. Note that this problem will be described later in connection with the mounts of other Patent Documents 2 and 3.

The seismic isolation structures of Patent Literatures 2 and 3 are configured by wooden gantry made of wood. However, these wooden frames have the following problems.
That is, the issues are the tightening strength at the joint between the wooden gantry and the seismic isolation device (Problem 1), and the torsional strength of the wooden gantry (Problem 2).

  Hereinafter, these problems 1 and 2 will be described.

Problem 1: Tightening strength at the joint between the wooden frame and the seismic isolation device The seismic isolation structure installs multiple seismic isolation devices between the building and the ground, and insulates this building from the ground (foundation) Since the structure does not transmit vibrations, the gantry and the seismic isolation device must be firmly connected (also called tightening). The reason is that the building (stand) cannot be insulated from the ground (foundation) unless it is firmly connected (tightened), and the seismic force at the time of the earthquake causes the building to tilt and the seismic isolation effect is not exhibited. is there.
However, in the seismic isolation structure, if the base is made of wood, the connection between the wooden base and the seismic isolation device will be the connection between the base timber and the metal that composes the seismic isolation device. The force must not be loosened, do not move, do not move, do not come off (hereinafter, also referred to as sliding), and, of course, must be strong and strong without breaking. However, it is difficult to secure such a firm and strong tightening strength in connection with a wooden frame.
That is, the wooden gantry is made of wood, and while this wood has advantages such as easy availability, easy processing and low cost, it is also fragile, susceptible to decay, etc., and has a great deterioration over time, thereby becoming brittle. It has weaknesses such as metal materials and reinforced concrete, and has poor durability.

On the other hand, as described in the specification of Patent Document 2, normally, a seismic isolation device connects a pair of saucers, a sphere interposed between these saucers, and a pair of saucers to form a sphere. Each of the pair of trays is made of a metal material.
Then, the connection between the wooden frame and the seismic isolation device is made of wood and metal made of different materials, and the timber of the timber frame base is more vulnerable than the metal material of the seismic isolation device. In addition, it is extremely difficult to secure a firm and strong tightening strength that does not slide.
Therefore, in Patent Document 2, the seismic isolation device and the wooden gantry are connected via a mounting plate. However, there is a limit in securing the required tightening strength only by the connection via the mounting plate. is there. Further, in Patent Document 1 described above, a fire striking member is provided, and the seismic isolation device is connected to this member. However, even with this connection, it is difficult to secure the required tightening strength.

Problem 2: About the torsional strength of the wooden gantry When an earthquake occurs, the building is subjected to strong rolling, and an excessive tensile force acts on the gantry, so that the wooden gantry tends to be twisted and deformed.
In view of this, the flat plate disclosed in the above-mentioned document 1 is provided with a fire member so as to prevent the flat plate from being deformed (twisted). Further, the gantry of Patent Document 2 described above mounts a reinforcing bracket at an intersection of a plurality of timbers constituting the gantry, and connects a wooden reinforcing material with bolts in a substantially triangular plane in four corners of the gantry. Deformation is prevented. Further, the gantry of Patent Document 3 described above forms a hollow region between the frame wood of the gantry and the plurality of vertical and horizontal timbers, and a plurality of beam lumbers are vertically and horizontally erected horizontally in the hollow region. By improving the strength and rigidity, the gantry is prevented from being deformed.
However, these fire-hitting members, wooden reinforcements and wood beams to which the reinforcing metal fittings are attached are generally called sujikai (bracing), and such sujikai reinforcement is locally joined, that is, joined by so-called point contact. However, the coupling area is small, and as a result, it is difficult to secure rigidity required for structural calculation, that is, floor rigidity.

  By the way, even in the traditional wooden construction method, there is a high demand for the seismic isolation structure. In particular, in the San'in region, although about 65% of all new buildings are built using the conventional wooden construction method, the seismic isolation technology completed by this conventional wooden construction method has not yet been established. In addition, research and development of this vibration isolator and construction technology for houses have been promoted in industry-academia joint projects and the like, and are only beginning to be adopted in some houses such as prefabricated houses.

  The design and construction technology for seismically isolated houses is a new technology, and the structural design has been individually examined by the central government office and is a high hurdle, and it is very difficult for local private companies to design and construct beyond this hurdle. It has become difficult. In other words, the seismic isolation structure is a construction method that does not allow structural examination by a specific administrative agency under the Building Standards Law, and requires a so-called specialized agency to determine the suitability of structural calculations. Therefore, it is necessary to calculate the seismic isolation structure using the method indicated in the seismic isolation notification, and this calculation is performed for the superstructure (building), seismic isolation layer, substructure (foundation), and the joints between them. This is a calculation for structural design, and in the design of a seismic isolation frame for a wooden building, the seismic isolation notice is given to the wooden frame according to the specified floor rigidity, that is, in-plane shear rigidity, out-of-plane bending rigidity, and torsional rigidity. Rigidity that satisfies the specified criteria is required.

The present inventors have found that the wooden gantry has the above-mentioned problems 1 and 2. Since these are extremely difficult to solve even with the gantry described in Patent Documents 1 to 3, the present invention solves them. Therefore, based on the design and experiment of seismically isolated detached houses by the traditional wooden construction method, concretely, based on the architectural design suitable for the climate of San-in area, the design of irregular flat and three-dimensional houses which are in high demand in recent years Expanded including.
In this development, first, the tightening strength of the above-mentioned problem 1 can be solved by providing a plate supporting frame and a seismic isolation plate, and the torsional strength of the wooden frame of the above-mentioned problem 2 can be solved by using a wooden frame and a plate supporting frame. Is connected not by local point connection, but by surface contact connection with a larger area, and the seismic isolation device is connected via a seismic isolation plate of a predetermined size. Is the size calculated by adding a certain remainder to the response displacement (movement) of the building during the earthquake of the seismic isolation device used and used (based on the seismic isolation (Related to the seismic isolation clearance which is indispensable to the building), the wooden gantry has arrived at the fact that the floor rigidity required for the structural calculation can be secured, and the present invention has been completed. The seismic isolation clearance is a clearance (clearance) between the foundation and the building that is safe even if the seismic isolation device is displaced when an earthquake occurs and the building (building) shakes.

  An object of the present invention is to construct a gantry supporting a building with a wooden gantry assembled from wood as an aggregate, and to solve a problem generated with a seismic isolation device and the like by using the wooden gantry, In addition to securing strong tightening strength in connection with the equipment, the gantry secures the floor rigidity required for structural calculation, realizes simple and simple construction method, shortens the construction period, etc., and reduces total cost. It is an object of the present invention to provide a seismic isolation structure that is easily applied to a wooden house.

  Further, another object of the present invention is to provide a seismic isolation structure having the above-mentioned object, to realize simplification and simplification of the construction method, shorten the construction period, etc., to realize a reduction in total cost, and to meet demand in recent years. It is an object to provide seismically isolated wooden buildings with many irregular planar shapes and three-dimensional housing designs.

A seismic isolation structure according to a first aspect of the present invention includes a foundation constructed on the ground, a plurality of seismic isolation devices arranged on the foundation, and a plurality of In a seismic isolation structure including a seismic isolation plate and a wooden timber frame supporting each of the seismic isolation plates to support a wooden building, the timber frame has a space of a predetermined size inside. And a plurality of grid frames of a predetermined size formed by partitioning a plurality of inner frame members in a grid at predetermined intervals in the vertical and horizontal directions in the outer frame, and Of the lattice frames, the plate frame is inserted and fixed to the lattice frame corresponding to each of the seismic isolation devices, respectively, and the timber frame is configured between each of the seismic isolation devices. With the seismic isolation plate interposed, one of the front and back surfaces of each seismic isolation plate is connected to the respective seismic isolation device, and the other There, characterized in that it is coupled to the frame member and the plate receiving part bone around which form the respective lattice frame.

The seismic isolation structure according to a second aspect of the present invention is the seismic isolation structure according to the first aspect, wherein the area of the contact coupling surface of the seismic isolation device, the seismic isolation plate, and the plate-bearing bone of the timber frame base is respectively set. When A1, A2 and A3, these are the following relations:
A2> A1, A2> A3
Is characterized in that:

Seismic isolation structure of a third aspect of the present invention, in the seismic isolation of the first or second aspect, the half-timbered peripheral frame constituting a frame, lattice frame and the plate receiving part bone formed both in laminate It is characterized by having.

A fourth embodiment of the wooden seismic isolation structure of the present invention is provided with the seismic isolation structure of any one of the first to third aspects.

A seismic isolation structure according to a first aspect of the present invention includes a foundation constructed on the ground, a plurality of seismic isolation devices arranged on the foundation, and a plurality of In a seismic isolation structure including a seismic isolation plate and a wooden timber frame supporting each of the seismic isolation plates to support a wooden building, the timber frame has a space of a predetermined size inside. And a plurality of grid frames of a predetermined size formed by partitioning a plurality of inner frame members in a grid at predetermined intervals in the vertical and horizontal directions in the outer frame, and Of the lattice frames, the plate frame is inserted and fixed to the lattice frame corresponding to each of the seismic isolation devices, respectively, and the timber frame is configured between each of the seismic isolation devices. With the seismic isolation plate interposed, one of the front and back surfaces of each seismic isolation plate is connected to the respective seismic isolation device, and the other There has a coupled structure to the frame member and the plate receiving part bone around which form the respective lattice frame.
With this configuration, first, since the wooden frame base is made of wood, it is inexpensive, easily processed, and easily manufactured as compared with other concrete and steel structures. Further, since the plate receiving bones are incorporated and fixed in the lattice frame corresponding to the seismic isolation device in a substantially uniform and well-balanced manner, the weight and the rigidity are improved. In addition, the seismic isolation plate is fixed, making it more solid.
As a result, in the case of a wooden timber frame, problems that occur with the seismic isolation device, such as securing strong tightening strength by coupling with the seismic isolation device, and floor stiffness required for structural calculations , The construction method can be simplified and simplified, and the construction period can be shortened, etc., and the total cost can be reduced to facilitate application to wooden houses.

According to the seismic isolation structure of the second aspect of the present invention, the areas of the contact coupling surfaces of the seismic isolation plate and the plate receiving bone of the timber frame are A1, A2 and A3, respectively, and their sizes are A2> A1 , A2> A3, it is possible to secure the floor rigidity required by the structural calculation. That is, the timber frame base can secure the rigidity that satisfies the criteria shown in the seismic isolation notice by the in-plane shear rigidity, out-of-plane bending rigidity, and torsional rigidity.

According to the seismic isolation structure of the third aspect of the present invention, since the outer frame, the lattice frame, and the plate receiving frame that constitute the timber frame are all formed of a laminated material, they can be easily obtained, easily processed, and inexpensively. Strength can be secured.

According to the wooden seismic isolation building of the fourth aspect of the present invention, the construction method can be simplified and simplified, the construction period can be shortened, etc., and the total cost can be reduced. We can provide house design seismically isolated wooden buildings of three-dimensional and three-dimensional shapes.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the base-isolated wooden building provided with the base-isolation structure which concerns on embodiment of this invention. 2A is an enlarged cross-sectional view of a main part of the seismic isolation structure in which a part of the seismic isolation wooden building of FIG. 1 is cut, and FIG. 2B is a cross-sectional view of the seismic isolation device. It is an isometric (isometric projection) figure of the seismic isolation structure main part which concerns on embodiment of this invention. 4 shows the base-isolated wooden building (wooden house) shown in FIG. 1, FIG. 4A is a plan view of the first floor, and FIG. 4B is a plan view of the second floor. 5 shows a base part of the base-isolated wooden building of FIG. 1, FIG. 5A is a plan view of the base-isolated table arrangement in the base part, and FIG. 5B is a plan view of the base-isolated plate arrangement corresponding to each base-isolation device. . 6 shows the seismic isolation plate of FIG. 5B, FIG. 6A is a plan view, and FIG. 6B is a detailed sectional view of working and mounting. 7 shows a timber frame supporting the seismic isolation wooden building of FIG. 1, FIG. 7A is a plan view, and FIG. 7B is a perspective view of one plate receiving bone of FIG. 7A. 8A and 8B show a prior art wooden housing base, FIG. 8A is a partial cross section, and FIG. 8B is a perspective view of a main part.

  Hereinafter, a seismic isolation structure according to an embodiment of the present invention and a seismic isolation wooden building including the same will be described with reference to the drawings. However, the embodiment described below is an example of a base-isolated structure for embodying the technical idea of the present invention and a base-isolated wooden building having the same, and it is specified that the present invention is specified to this. It is not intended and is equally applicable to other embodiments that fall within the scope of the appended claims.

[Embodiment]
With reference to FIGS. 1 to 3, an outline of a seismic isolation structure according to an embodiment of the present invention and a seismic isolation wooden building including the same will be described. 1 is a front view (south elevation) of a base-isolated wooden building having a base-isolated structure according to an embodiment of the present invention, and FIG. 2A is a partially broken base-isolated wooden building of FIG. FIG. 2B is an enlarged sectional view of a main part of the seismic isolation structure, FIG. 2B is a sectional view of the seismic isolation device, and FIG. 3 is an isometric (isometric projection) view of the main part of the seismic isolation structure according to the embodiment of the present invention.

A seismic isolation wooden building 10 having a seismic isolation structure according to an embodiment of the present invention is composed of a two-story wooden house above the ground, as shown in FIGS. 1 and 2, and this wooden house is constructed on the ground GL. The lower structure 10 _G of the foundation, a pedestal (hereinafter referred to as a timber frame pedestal) 21 made of wood as an aggregate and supporting the wooden house of the upper structure 10 _F located above the lower structure 10 _G , and the lower structure 10 _G and the upper portion and a seismic isolation layer 10 _D of the seismic isolation device 16 is disposed there between structures 10 _F, the seismic isolation layer 10 _D, a plurality of seismic isolation device _{161-164 12} (FIG. 4A, (See FIG. 5B).
The timber frame base 21 is formed of an integrated material. Note that the present invention is not limited to a wooden building being a two-story house with a wooden building above the ground, but may be any structure.

Seismic isolation structure 11 in the base isolation wooden building (wooden houses), as shown in FIGS. 1 to 3, and the lower structure 10 _G foundation, a plurality of seismic isolation arranged in seismic isolation layer 10 _D An apparatus 16, a plurality of seismic isolation plates 19 fixed to each seismic isolation device, and a timber frame base 21 made of an integrated material for supporting the wooden house to which each seismic isolation plate is fixed. Is an outer frame 22 having a space of a predetermined size provided therein, and an inner frame member including a plurality of vertical frame members 23, an inner frame member 24 and a connecting frame member 25 within the outer frame 22 at predetermined intervals in the vertical and horizontal directions. spaced a plurality of lattice frame 30 of a predetermined size formed by dividing a lattice shape, among these plurality of lattice frame 30, respectively fitted and fixed to the grid frame 30 corresponding to each isolator 16 And the timber frame base 21 is provided between each seismic isolation device 16. Respectively and the seismic isolation plate 19 is interposed, the seismic isolation plate 19, on one surface of the front and back surfaces seismic isolation device 16, the frame member around which the other surface forming each lattice frame 30 and the plate receiving part bone 26. Reference numeral 14 denotes a standing foundation, 15 denotes a seismic isolation table, and 28 denotes a structural plywood.

When the seismic isolation structure 11 compares the respective areas of the connecting planes of the timber frame base to which the seismic isolation device 16, the seismic isolation plate 19, and the plate receiving frame 26 are fixed as A1, A2, and A3, the following relations are obtained. Equation (a) is used.
A2> A1, A2> A3 (a)
And in this relational expression (a), the area A2 of the seismic isolation plate 19 is determined by the seismic isolation device used and used.
That is, the area A2 of the seismic isolation plate is calculated by adding a certain remainder to the response displacement (movement amount) of the building during the earthquake of the seismic isolation device to be adopted and used, and calculating the size based on the added value. Has become. This size (length) is related to the seismic isolation clearance, which is indispensable for seismic isolation buildings.
As described above, by setting the area of the seismic isolation plate A2 to the above and satisfying the relational expression (a), the timber frame base can secure the floor rigidity required in the seismic isolation structure calculation.

According to this seismic isolation structure, the following excellent operational effects can be obtained.
In other words, the gantry supporting the building is composed of a wooden gantry assembled from wood as aggregate, and the problem with the seismic isolation device is solved by this wooden gantry, Strong fastening strength is secured in the connection, and the gantry also secures the floor rigidity required for the structural calculation, which simplifies and simplifies the construction method and shortens the construction period. Application to wooden houses becomes easy.
In addition, first, since the wooden frame base is made of wood, it is inexpensive, easily processed, and easily manufactured as compared with other concrete and steel frames. Further, since the plate receiving bones are incorporated and fixed in the lattice frame corresponding to the seismic isolation device in a substantially uniform and well-balanced manner, the weight and the rigidity are improved. In addition, the seismic isolation plate is fixed, making it more solid.
As a result, in the case of a wooden timber frame, problems that occur with the seismic isolation device, such as securing strong tightening strength by coupling with the seismic isolation device, and floor stiffness required for structural calculations Simplification and simplification of the construction method and shortening of the construction period can be realized, so that total low cost can be achieved and application to a wooden house becomes easy.

  Hereinafter, the individual configuration and other features of the seismic isolation structure and the seismic isolation wooden house provided with the same will be described.

Seismic isolation wooden buildings (hereinafter, simply also referred building) 10, the seismic isolation layer 10 _D, a plurality of seismic isolation device _{161-164 12} (Fig. 4A, see FIG. 5B) are arranged respectively at predetermined positions ing. These seismic isolation devices have the same configuration.
As shown in FIG. 2B, the seismic isolation device 16 connects a pair of opposed trays 17a and 17b, a sphere 18 movably interposed between these trays, and a pair of 18 and a flexible connecting member which surrounds from outside, the pan 17a, 17b is recessed holes 17 ₀ for spheres are seen formed on the opposite surface.
Sphere 18 is composed of a single or a plurality of iron balls or steel balls or the like, a pair of saucer 17a, by rolling contactable to sliding contact with the recessed hole 17 ₀ 17b, the pair absorb seismic energy in the event of an earthquake saucer 17a and 17b are moved and displaced. The connecting body is formed in an elastic cylindrical shape, and the open end is fitted to the peripheral edge of each of the receiving trays 17a and 17b.
According to this seismic isolation device, when an earthquake occurs and the foundation of the building vibrates (also referred to as vibration), the sphere of the seismic isolation device rolls inside the connecting body to exert a bearing function, and the pair of saucers are incompatible. The building slides in the direction to receive the shaking of the earthquake, and the effect of the parrying causes the building to be isolated. Due to this seismic isolation function, the furniture and the like in the house do not fall over, and the occupants can reduce their fear. In addition, such a seismic isolation device is already commercialized, marketed, and known.

The seismic isolation structure and the seismic isolation wooden building of the embodiment of the present invention use, for example, the following seismic isolation devices that are already commercially available.
Manufacturer name (Oiles Industry Co., Ltd.), Product name (Lightweight building seismic isolation device: FPS-HP), Product target (Approximately 1 to 3 story wooden), Product structure (Pressing and molding stainless steel plate) , manufactured meets the filler into the cavity portion), the movable element diameter (100Fai), long-term surface pressure (up to ^{13.5N / mm 2, 10.0N / mm} 2 is measure an average of the entire building).
The outer dimensions of the FPS-HP main body are 630 × 630 × H (93.1) mm.
The seismic isolation device, the device spacing as small number of uses increases, the loads of the frame supporting the housing is increased, manufacturers use of about one on the building area (first floor floor area) 10 m ² Recommended. The above is quoted from a pamphlet issued by the company.
The product specifications are the basis for determining the design dimensions of the lower structure, the timber frame support, the upper structure, and the like, which will be described later. In addition, the present invention is not limited to the seismic isolation device described above, and seismic isolation devices of other manufacturers and other specifications can be used.

Next, the upper structure will be described with reference to FIG. 4 shows the seismic isolation wooden building of FIG. 1, FIG. 4A is a first floor plan view, and FIG. 4B is a second floor plan view.
The upper structure _10F is composed of a two-story wooden house having a height of about 50% of the building area, and the house is unevenly distributed on the northeast side. Then, as shown in FIG. 4, the first floor 10 _1F is a U-shaped incorporating the courtyard In the planar shape, the wooden deck (eg 12m ²⁾ provided on the south side side central, each predetermined floor plan, the first floor For example, a Japanese-style room, a DK, a hobby room, a storage room, a washroom / bathroom, an entrance hall, a machine room, etc. of a predetermined size are provided, and a bedroom, a Japanese-style room, a children's room, a closet, etc. are provided on the second floor _102F. . This house has a total floor area of, for example, 133.88 m ² and a building area of 106.20 m ² .
This wooden house is of a pure Japanese style, and a wooden deck is provided on the first floor _101F, and a two-story part of about 50% of the building area is unevenly distributed on the northeast side. The planar shape and the three-dimensional shape are irregular designs compared to the disclosed building (the planar shape and the three-dimensional shape are fixed). For this reason, conventional seismic calculation cannot be directly applied to the calculation of seismic isolation structure, which is troublesome in comparison. The wooden house is not limited to the above-mentioned one, but may be any type of house.

Under the floor of the first floor _101F , a plurality of seismic isolation devices 16 _{1 to} 16 ₁₂ are arranged as shown in FIG. 4A.

  This wooden house is built with predetermined seismic isolation clearances on the east, west, north and south. The clearance will be described later.

The lower structure will be described with reference to FIG. 5 shows a base portion of the base-isolated wooden building of FIG. 1, FIG. 5A is a plan view of an array of base-isolated tables in the base portion, and FIG. 5B is a plan view of an array of base-isolated plates corresponding to each base-isolation device. It is.
Lower structure 10 _G is, in the ground GL, is built with a predetermined seismic isolation Clarence between the surrounding buildings.
Seismic isolation clearance (hereinafter referred to as clearance) is indispensable for seismic isolation buildings, and the horizontal displacement (movement) of the building caused by seismic force will not affect the surrounding area even if this maximum horizontal displacement occurs. A gap provided so as not to collide with a structure or land, that is, the separation from the periphery of a building, which is the separation of the building from the adjacent land and road boundary, or the surrounding work, etc. This is a separation obtained by adding a certain margin to the response position (movement amount) of the building.
A certain allowance is, for example, at least 20 cm in a portion where a person may be pinched by the movement of a building (for example, an outer wall or a bay window portion on the first floor), or a portion where a person does not enter (for example, an eaves front). , On the second floor balcony, etc.), for example, plus 10 cm or more, which are determined by notification.
This clearance is changed depending on the seismic isolation device used and used. That is, in this embodiment, since the FPS-HP is used, the response displacement amount that can be used in the design is 405 mm (100φ), and as a result, the clearance of the building layout design has a certain margin for the response displacement amount of 405 mm. The separation value is obtained by adding 100 mm to 200 mm.
Symbols L ₁ and L _{2 in} FIG. 1 indicate the clearance from one side wall of the building. Of course, the other four side walls have a predetermined clearance.

The lower structure 10 _G, as shown in FIG. 2A, made reinforced concrete structure, laying a solid foundation base concrete 13 on the macadam 12 is coupled to a ground beam, a plurality of seismic isolation device 16 ( It is constituted by a robust structure having a plurality of seismic isolation tables 15 (one of the plurality) that support one of the plurality. The underground beam has a configuration in which a reinforcing bar (not shown) is arranged on a solid foundation portion and concrete is cast.
Outer periphery of the lower structure 10 _G, the predetermined number therein surrounded by a rising basis 14, in this embodiment twelve MenShindai _{15 1-15 12} (see FIG. 5A) is installed.
A plurality of MenShindai 15 _{1-15 12} is the same, reference numeral 15a denotes a connecting reinforcement widening Concrete, thereby MenShindai is assumed virile reinforced.
Each seismic isolation table has a size of, for example, 900 mm long × 900 mm wide × height (about 350 mm).
Rising basis 14 of the outer periphery, the neighboring land predetermined clearance has been built is ensured between such boundaries, also, the seismic isolation device 16 is separated a predetermined distance L _G from rising basis 14. The lower structure is not limited to this, but may be another basic structure, for example, a flat slab type.

A plurality of MenShindai _{15 1-15 12,} as shown in FIG. 5A, is disposed in the floor plan corresponding positions of the housing 1 floor _{10 1F} (see FIG. 4A).
These MenShindai _{15 1-15 12,} four vertical columns are arranged in three horizontal stages. Distance _y 1 1 column left are three MenShindai ₁₅ 1-15 ₃ given in Fig. 5B, _{y 2,} also, the second column three MenShindai ₁₅ 4-15 ₆ spacing _{y 1} the _y 2, 3 row are three MenShindai ₁₅ 7-15 ₉ spacing _{y 1, y} 2, 4 column are three MenShindai _{15 10-15 12} spacing _y 1, _{y 2} Each row is opened, and predetermined intervals x ₁ , x ₂ , x ₃ , x ₄ , and x ₁ are also opened between rows.
These intervals are determined by the seismic isolation device used and used.
In this embodiment, since FPS-HP is used, this apparatus is provided with one unit per 10 m ² of the building area (floor area of the first floor).
Thus, the dimensions are, for example, _{y 1} is 750 mm, _{y 2} is 3750Mm, also, _{x 1} is 750 mm, _{x 2} is 3300 mm, _{x 3} is 4500 mm, _{x 4} becomes 2500 mm.
The distance of the lowermost stage, in accordance with the irregular planar shape, finely _{x 1, x 2, x 1} , x 5 (3000mm), x 1, x 4. It is divided into x _1.

At positions corresponding to the plurality of MenShindai _{15 1-15 12,} the seismic isolation plates ₁₉ 1 _{to 19 12} are respectively disposed. These seismic isolation plates have a wooden frame base 21 on the upper surface and a seismic isolation device 16 on the lower surface.
These seismic isolation play _{19 1-19 12,} as shown in FIG 5B, in a position corresponding to each MenShindai _{15 1-15 12,} four vertical columns, arranged in three horizontal stages arranged dimensions Is the same as y ₁ , y ₂ and x ₂ , x ₃ , and x ₄ .

The seismic isolation plate will be described with reference to FIG. 6 shows the seismic isolation plate of FIG. 5B, FIG. 6A is a plan view, and FIG. 6B is a detailed sectional view of processing and mounting.
Seismic isolation plate 19 (FIG. 2) consists of a plurality of seismic isolation plates ₁₉ 1 _{to 19 12} (FIG. 6), which are to solve the above problems 2 (torsional strength half-timbered frame), in the structure calculations This ensures the required floor stiffness.
In this embodiment, each of the seismic isolation plates 19 _{1 to} 19 ₁₂ has the same shape and is formed of a square metal plate having a predetermined area and thickness. That is, the four sides 19a to 19d have the same square length . The length of the side is determined by the seismic isolation device used and used. That is, a certain remainder is added to the response displacement amount (movement amount) of the building at the time of the earthquake of the vibration isolation device, and the added value is set to a length twice or more.
In the present embodiment, the response displacement amount of the FPS-HP is 405 mm, the remainder is 100 to 200 mm, and a double value of the total value is 1010 to 1210 mm. Therefore, in the present embodiment, the length of one side is set to 1500 mm based on the above value.
Therefore, the dimensions, the lateral side _{a 1} is 1500 mm, the longitudinal side _{b 1} is 1500 mm, the wall thickness is 12 mm. The thickness (12 mm) is also changed depending on the seismic isolation device to be adopted and used.
As a result, the connection area with the timber frame is increased, and the connection can be firmly performed.
In addition, the seismic isolation plate is not limited to a square, but may be a rectangle, that is, a so-called rectangular shape. In this case, it is determined based on the length of the short side.
The seismic isolation plate 19, a plurality of screw holes 19 ₁ along the side at a position close to the outer peripheral edges is bored at a predetermined interval, diagonally and on opposite sides of the center line connecting the corner portion at predetermined intervals, the screw holes 19 ₂ is bored,
The surface of the seismic isolation plate 19 is applied to the plate receiving frame 26 and peripheral frame members (the outer peripheral frame 22, the vertical frame member 23, the horizontal frame member 24, and the connecting frame member 25) forming the lattice frame 30 to which the plate is fixed. by contact, by inserting a screw 20 into the screw holes 19 _1, 19 _2, respectively, are secured nailed to the frame member and the plate receiving part bone 26 near which forms a lattice frame (see FIG. 6B). The back surface is fixed to the seismic isolation device 16 (not shown).
By mounting and fixing the seismic isolation plate 19 to the timber frame 21, it is possible to prevent the frame made of wood, that is, the lattice frame 30 and the plate receiving frame 26 from being depressed or bent. In addition, the seismic isolation plate 19 plays an important function of securing the floor rigidity required in the structural calculation as described above. The relation between the areas of the connecting planes of the seismic isolation device 16, the seismic isolation plate 19, and the timber frame base 21 to which the plate receiving frame 26 is fixed, and the relationship between A1, A2, and A3 will be described later.

The timber frame base will be described with reference to FIG. 7 shows a timber frame supporting the seismic isolation wooden building of FIG. 1, FIG. 7A is a plan view, and FIG. 7B is a perspective view of one plate receiving bone of FIG. 7A.
The timber frame base 21 is a base for supporting the load of the building, and transmits the axial force of the building to the seismic isolation device because it is virtually impossible to install the seismic isolation device immediately below the columns of all the buildings. It is for.
The timber frame base 21 has an outer peripheral frame 22 having a space of a predetermined size provided therein, and a plurality of inner frame members formed in the outer peripheral frame by dividing the inner frame material vertically and horizontally at predetermined intervals into a lattice shape. A plurality of lattice frames 30 of a size, and of these plurality of lattice frames 30 , plate receiving bones 26 fitted and fixed respectively to the lattice frames 30 corresponding to the seismic isolation devices 16 _{1 to} 16 ₁₂ , The outer peripheral frame 22, the plurality of inner frame members, and the plate receiving frame 26 are each formed of a laminated material.
The laminated material is wood made by laminating and bonding many thin ground plates such as veneers, and has high strength.

Peripheral frame 22 has a shape corresponding to the rising basis 14 of the undercarriage 10 _G, it is formed by a plurality of outer frame member ₂₂ 1-22 _8. That is, a columnar body of a predetermined shape and thickness made of a laminated material is processed and joined into a shape corresponding to the rising foundation.
The pillar is preferably a square pillar. Its dimensions are, for example, 120 mm in width and 300 mm in height. Incidentally, in the FIG. 7A, a horizontally long 11,800mm and portrait is 9000 mm, length _{c 1} obtained by dividing these is 1500 mm, _{c 2} is 1800 mm, _{c 3} is 3000 mm, _{c 4} is 1000mm and _{d 1} is 1500mm, _{d 2} has a 2250mm.

A plurality of inner frame member, the vertical frame member 23 consists of horizontal frame member 24 and the joint frame member 25 is formed of a square pole having a predetermined thickness laminate of.
Vertical frame member 23 is two square pillar ₂₃ 1, 23 _2, the horizontal frame member 24 consists of two quadrangular prism ₂₄ 1-24 _4, in jumpsuit frame member 25 also two square pillar ₂₅ 1, 25 ₂ Is formed.
By dividing the inside of the outer peripheral frame 22 into a lattice shape using these inner frame members, a lattice frame 30 having a predetermined space therein is formed. Of these lattice frame 30, the plate receiving part bone 26 in the space s ₁ in the box corresponding to each seismic isolation device is fixed fitted.
Since this fitting / fixing is a surface-to-surface connection between the lattice frame 30 and the plate receiving bone 26, it is more rigid than the conventional local (point contact connection) connection. In addition, the timber frame base 21 is solidified by inserting and fixing the plate receiving frame 26 in a lattice-shaped frame corresponding to the seismic isolation device 16. That is, the plurality of plate receiving bones 26 are arranged and fixed in the lattice-like frame in a substantially uniform and balanced manner, and they are firmly connected in the lattice frame 30 . It is conceivable that the timber frame base 21 is formed of a single plate-like body. However, in this case, a thick plate-like body must be laid all over, so that the material cost increases and the weight increases. . According to the timber frame base 21 of the present embodiment, compared to the above-described plate-shaped body base, the material is reduced in material and weight.

As shown in FIG. 7B, the plate receiving bone 26 is composed of a substantially erect rectangular block formed by laminating a plurality of plate pieces having predetermined vertical and horizontal widths and thickness, and the size thereof is fitted into the space of the lattice frame. It is sized.
That the plate receiving part bone 26, among the plurality of lattice frame, because they are respectively fitted and fixed in the space s ₁ grid frame corresponding to the seismic isolation device, which is part of the lattice frame not all of the lattice frame Therefore, the base can be made firm and lightweight. In addition, the member dimensions of the plate receiving bone 26 are, for example, 120 mm in length and width and 210 mm in height h.

A seismic isolation structure and a seismic isolation wooden house provided with the same are constructed using the members described above.
Referring to FIG. 2, first, to construct a substructure 10 _G on the ground, the plurality of MenShindai 15 in the base isolation layer 10 _D, respectively installing the seismic isolation device 16. Next, the timber frame base 21 is fixed with the seismic isolation plates 19 interposed therebetween. A structural plywood 28 is placed on the timber frame, and a finishing floor 29 is laid on and connected to the plywood 28. In the timber frame 21, a gap is formed between the frame member and the plate receiving frame 26 at different heights, so that a gap is filled with the heat insulating material 27.
Thereafter, a wooden house is constructed on the timber frame 21. This construction is the same as conventional construction. Description is omitted.

The constructed seismic isolation structure 11 compares the respective areas of the connecting planes of the seismic isolation device 16, the seismic isolation plate 19, and the timber frame base 21 to which the plate receiving frame 26 is fixed as A1, A2, and A3. (A).
A2> A1, A2> A3 (a)
In this relational expression (a), the area A2 of the seismic isolation plate 19 is determined by the seismic isolation device to be adopted and used, that is, when the seismic isolation plate is made square, the length of one side is determined by the building at the time of the earthquake. A certain remainder is added to the response displacement amount (movement amount), and the length is set to be twice or more the added value, and the area is calculated using this length. The seismic isolation plate is not limited to a square, but may be a rectangle, a so-called rectangular shape. In this case, it is determined based on the length of the short side. The amount of response displacement and the surplus differ depending on the seismic isolation device used and used.
The seismic isolation structure satisfies the condition of the above relational expression (a) to obtain the floor stiffness required in the structural calculation (stiffness that satisfies the criteria shown in the seismic isolation notification), ie, in-plane shear stiffness and out-of-plane bending. Rigidity and torsional rigidity can be secured.

According to the seismic isolation structure of this embodiment, first, the timber frame base is made of wood, so that it is inexpensive, easily processed, and easily manufactured as compared with other concrete and steel structures. Further, since the plate receiving bones are incorporated and fixed in the lattice frame corresponding to the seismic isolation device in a substantially uniform and well-balanced manner, the weight and the rigidity are improved. Furthermore, the seismic isolation plate is fixed, so that it becomes solid.
As a result, in the case of a wooden timber frame, problems that occur with the seismic isolation device, such as securing strong tightening strength by coupling with the seismic isolation device, and floor stiffness required for structural calculations Simplification and simplification of the construction method and shortening of the construction period can be realized, so that total low cost can be achieved and application to a wooden house becomes easy.

  In addition, seismically isolated wooden buildings are equipped with this seismic isolation structure, which enables simplification and simplification of the construction method and shortens the construction period, thereby reducing the total cost. It can be a flat or three-dimensional house design.

10 seismic isolation wooden building 10 _G lower structure 10 _D seismic isolation layer 10 _F upper structure (wooden building)
11 seismic isolation structure 14 rising underlying 15,15 _{1-15 12} MenShindai 16,16 _{1-16 12} seismic isolation device 19,11～19 ₁₂ seismic isolation plate 21 half-timbered frame 22 peripheral frame 23 vertical frame members 24 lateral frame Material 25 Jumpsuit frame material 26 Plate timber frame 27 Insulation material 28 Structural plywood 29 Finishing floor
30 lattice frame

Claims (4)

A foundation constructed on the ground, a plurality of seismic isolation devices arranged on the foundation, a plurality of seismic isolation plates fixed to the respective seismic isolation devices, and the respective seismic isolation plates are fixed. And a wooden timber frame supporting a wooden building.
The wooden frame mount has an outer peripheral frame provided with a space of a predetermined size inside, and a predetermined size formed by partitioning a plurality of inner frame materials in the outer peripheral frame into a lattice shape at predetermined intervals vertically and horizontally. It has a plurality of lattice frames, of the plurality of lattice frames, each of the lattice frames corresponding to each of the seismic isolation device, and a plate receiving bone fixed and inserted, respectively,
The timber frame base has the seismic isolation plates interposed between the seismic isolation devices, respectively, and each of the seismic isolation plates has one of the front and back surfaces on the seismic isolation device and the other surface on the other side. A seismic isolation structure, which is coupled to a peripheral frame member forming each of the lattice frames and the plate receiving frame . When the areas of the contact coupling surfaces of the seismic isolation device, the seismic isolation plate, and the plate receiving bone of the timber frame are A1, A2, and A3, respectively, these are the following relationships:
A2> A1, A2> A3
The seismic isolation structure according to claim 1, wherein: Seismic isolation structure according to claim 1 or 2, wherein the half-timbered peripheral frame constituting a frame, lattice frame and the plate receiving part bone that is formed both in the laminate. A wooden seismic isolation building comprising the seismic isolation structure according to any one of claims 1 to 3 .

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