JP3062546B2 - Seismic isolation foundation coupling device for buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation base structure of a building, and more particularly to a seismic isolation structure having a sufficient seismic isolation effect against externally applied loads to the building such as seismic force. The present invention relates to a seismic isolation foundation coupling device capable of constructing an excellent building.

[0002]

2. Description of the Related Art Generally, when a foundation such as a wooden house is constructed, a foundation is mounted and fixed on a cloth foundation, and column bases are connected together with braces as necessary with a required space therebetween. Fixed.

[0003] However, in a building using this kind of foundation construction method, when an excessive load acts on the foundation structure due to a large earthquake or the like, the foundation structure is broken, and the building may be damaged or collapsed. There is.

[0004] From such a viewpoint, various basic construction methods have been proposed in order to improve the safety of this type of building.

[0005] For example, Patent No. 16
The earthquake-resistant foundation construction method according to No. 10636 is to lay rock stone in a trench for foundation construction, compact it, beat discarded concrete on it, lay H-shaped steel on this discarded concrete,
These H-beams are connected to each other to form a foundation steel frame to form an underground beam, and a steel column of a house is erected on the underground beam, and then around the H-beam and the steel column in the trench for foundation work. The concrete is poured into concrete to improve the earthquake resistance (Japanese Patent Publication No. 2-36742).

[0006] Further, the present applicant has further improved
The excavation is performed to bury the underground beam foundation of the house building on the ground surface, and the excavation bottom of this excavation, where the column pedestal is placed, is dug deeper than other parts. Performing split chestnuts and the like on the entire cutting bottom, casting discarded concrete on the upper part, and further casting concrete for foundation on the upper part of the discarded concrete where the column base of the root cutting is placed. , Split chestnuts, discarded concrete and foundation concrete are integrally formed to form the foundation on which the column base is placed,
Further, an H-shaped steel beam material is fixed to the lower side surface of the iron column, and the iron columns are connected to each other by the H-shaped steel beam material to form a skeleton of an underground beam. By surrounding the skeleton of the beam with reinforcing steel reinforcement and casting concrete around the underground beam skeleton and reinforcing steel to form an integrated underground beam foundation with the foundation, excellent strength, In addition, an underground beam foundation construction method for a building has been proposed in which the roots other than the portion where the underground beam is buried can be made shallower to facilitate the construction (Japanese Patent Laid-Open No. Hei 7-26567).

[0007]

However, in the foundation structure by the above-mentioned conventional foundation construction method, there is obtained an advantage that structural strength is enhanced and seismic resistance is also increased. It is a seismic isolation structure that has sufficient absorption capacity, damping capacity, and ability to prevent building shake and resonance with the ground against seismic force transmitted from the ground foundation, especially relatively large seismic force. It is further required.

Conventionally, as such a seismic isolation structure, a vibration damping member such as a laminated rubber is provided on a foundation, and a building is fixed on the laminated rubber to absorb and attenuate the seismic force. A configuration having a seismic isolation effect has been proposed and implemented to prevent the building from shaking and the ground from resonating. In this case, a combination of the laminated rubber and a seismic isolation device such as a viscous damper, a steel damper, and a lead damper is also known.

However, in the conventional seismic isolation structure, since the vertical load is usually supported by the laminated rubber, when the building is made high-rise or heavy, the vertical load increases and the above-described seismic isolation effect is exhibited. You can't do that. When the supporting ground of the building is located at a relatively deep place, it is necessary to use a pile foundation structure, but in this case, the seismic isolation effect on the foundation pile cannot be expected. Furthermore, in the event of a major earthquake,
Not only body waves propagating vertically from the supporting ground,
A surface wave propagating horizontally in the surface ground becomes dominant as a component of the ground vibration, but it is relatively difficult to obtain a sufficient seismic isolation effect even for such a surface wave.

Accordingly, an object of the present invention is to provide a simple seismic isolation effect that can be easily applied to various foundation structures for buildings, and particularly to a surface wave propagating in the horizontal direction. It is another object of the present invention to provide a seismic isolation base connecting device for a building that has a relatively simple configuration and is versatile.

[0011]

In order to achieve the above-mentioned object, a seismic isolation foundation connecting apparatus for a building according to the present invention is installed between a foundation of a building and a member supported on an upper part of the foundation. It comprises a base and a lid having circular fitting recesses, which are fitted and fixed to the foundation and the support member, respectively, comprising a base-isolated foundation coupling device, and in a fitting hollow portion between the lid and the base, A plurality of flat springs are stacked and arranged so that the outer periphery of each flat spring is surrounded by a plurality of adjacent curved spring pieces, and further extend outside the circular fitting recess with the base and the lid. It is characterized in that the base and the lid are configured to be displaceable in the vertical and horizontal directions, respectively, by fitting and abutting between the substrate and the lid via an expansion spring.

In this case, the flat springs housed and arranged in the fitting hollow portion are made of a metal material having a tough elasticity and a rust-preventive effect, and a plurality of flat springs are appropriately laminated via a flat plate washer. The top and bottom edges of the flat springs are set so as to abut against the bottom surface of the circular fitting recess, and the base and the lid are separated from each other via the flat springs. A plurality of curved spring pieces are arranged adjacent to the inner peripheral portion of the circular fitting recess so as to
It can be configured to have compression elasticity in vertical and horizontal directions.

In the base and the lid constituting the basic coupling device, a plurality of compression coil springs are arranged in a balanced manner between the opposing substrate and the lid plate, and the base and the lid are vertically arranged. It can be configured to be elastically displaceable.

In the seismic isolation foundation connecting apparatus for a building according to the present invention, a coil spring is disposed in a fitting hollow portion between the lid and the base in place of the flat spring, and an outer periphery of the coil spring is provided. Are arranged so as to be surrounded by a plurality of adjacent curved spring pieces, and further fitted between the base plate and the cover plate extending outside the circular fitting concave portion with the base portion and the cover portion via a telescopic spring. The base portion and the lid portion may be configured to be displaceable in the vertical and horizontal directions, respectively, in contact with each other.

In this case, the coil spring housed and arranged in the fitting hollow portion is made of a metal material having tough elasticity and rust-preventive effect, and the top and bottom of the coil spring abut against the bottom surface of the circular fitting recess, respectively. The base and the lid are set apart from each other via the coil spring, and a plurality of curved spring pieces are arranged adjacent to the inner periphery of the circular fitting recess so as to face the outer periphery of the coil spring. Thus, it can be configured to have compression elasticity in the vertical and horizontal directions.

Also in this case, a plurality of compression coil springs are arranged in a balanced manner between the opposing substrate and the lid plate on the base and the lid constituting the basic coupling device, respectively. Can be configured to be elastically displaceable in the vertical direction.

According to the seismic isolation foundation coupling device for a building according to the present invention, a spring action of a flat spring or a coil spring and a telescopic spring against vertical body waves propagated from the ground during an earthquake. Thereby, the seismic isolation effect can be exerted. In addition, against the horizontal surface wave propagated from the ground during an earthquake, the seismic isolation effect is exerted by the elastic action and the displacement of the expansion and contraction spring by the curved spring piece provided at the fitting part between the lid and the base. Can be done.

[0018] Therefore, the above-mentioned foundation connecting device is configured such that, at the upper part of the foundation buried and fixed on the foundation ground, the base is connected and fixed by anchor bolts, and the lid is connected and fixed by the mounting bolts to the base of the building. It is possible to construct a base isolation base structure with excellent seismic isolation effect.

Further, by applying the above-mentioned base connecting device to the connecting portion between the eaves girder of a cabin and each column base, it is possible to make it possible to more effectively exert the seismic isolation effect on the building.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an embodiment of a seismic isolation base connecting apparatus for a building according to the present invention.

FIG. 1 to FIG. 5 show an embodiment of a seismic isolation foundation connecting apparatus for a building according to the present invention.
2 is a cross-sectional view of a main part on a base side, FIG. 2 is a cross-sectional view of a main part on a foundation side, FIG. 3 is a plan view of FIG. 2, FIG. 4 is a bottom view of FIG. 1, and FIG. It is a principal side sectional view showing a state.

Therefore, first, in FIG.
Denotes a base, and a column base 12
Are connected and fixed (see FIG. 6), and one end of a brace 14 (see FIG. 7) is connected and fixed to a part of the column base 12.

However, a lid 22 of a basic coupling device 20 having a shock absorbing function is attached to a lower portion of the base 10 to which the column base 12 is coupled and fixed. That is, the lid 22
Is made of a metal material having a toughness and a rust-preventing effect, such as stainless steel, and has a circular fitting concave portion 24 having a predetermined inner diameter d ₁ at a central portion thereof, and cover plates extending outwardly thereof. 26 is fixedly connected to the base 10 via mounting bolts 28 and nuts 29, respectively (see FIG. 1).

On the other hand, in FIG. 2, reference numeral 30 denotes a foundation, and a base 32 of the foundation coupling device 20 having the shock absorbing function is mounted on the foundation 30. That is, the base portion 32 is made of a metal material having a toughness and a rust-preventive effect such as stainless steel in the same manner as described above, and has a central portion slightly larger than the inner diameter d ₁ of the circular fitting concave portion 24 of the lid portion 22. A circular fitting recess 34 having a small outer diameter dimension d ₂ is provided on a base 36 extending outwardly of the base 10 via mounting anchor bolts 38 and nuts 29, respectively.
(See FIG. 2).

The above-described basic connecting device 20
As shown in FIG. 5, the circular fitting recesses 24 and 34 can be fitted to each other in a vertical relationship between the lid 22 and the base 32.

In this case, as shown in FIGS. 2, 3 and 5, a spring member 40 is housed between the circular fitting concave portions 34 and 24 of the base portion 32 and the lid portion 22 which are fitted to each other. Deploy. That is, the spring member 40 is formed by laminating a plurality of flat springs 42 made of a metal material having a tough elasticity and a rust-preventive effect such as stainless steel.
However, in the illustrated example, a plurality of (three) flat springs 42 are superimposed on each other with a flat plate washer 43 interposed therebetween, and a height dimension larger than the depth dimension of the circular fitting concave portion 34 of the base 32 is described. , So that the elasticity is maintained in the vertical direction.

Further, the spring member 40 having the above configuration is
The outer diameter is made smaller than the inner diameter of the circular fitting recess 34 of the base 32 to form a gap, and a plurality of curved spring pieces 4 are formed so as to face the outer periphery of the spring member 40 in this gap.
4 are arranged adjacently as shown in FIG. These curved spring pieces 44 are made of the same metal material as the flat spring 42. Therefore, as described above, the curved spring piece 44
Is provided, the spring member 40 can be configured to maintain elasticity in the horizontal direction in addition to elasticity in the vertical direction.

The elastic force of the spring member 40 and the curved spring piece 44 can be adjusted by appropriately changing the dimension setting in accordance with the magnitude of the load on the building.

In the base portion 32 of the basic coupling device 20, locking projections 33 are appropriately provided on a substrate 35 extending outside the circular fitting recess 34, and these locking projections 33 are provided.
A plurality of compression coil springs 35 are arranged in a balanced manner as expansion / contraction springs that maintain elasticity in the vertical direction via the helical spring (see FIG. 2). In this case, these compression coil springs 35
As shown in FIG.
It is set so as to be pressed and held between the cover 6 and the cover plate 26.
In FIG. 3, reference numeral 37 indicates a bolt insertion hole.

On the other hand, in the lid portion 22 of the basic coupling device 20, a protruding portion 25 is provided at the center of the inner surface of the circular fitting concave portion 24, and a spring member 40 provided in the circular fitting concave portion 24 of the base portion 32 is provided. Is constructed so as to be able to be inserted into the hollow portion of the flat spring 42 constituting the above. In FIG. 4, reference numeral 27 indicates a bolt insertion hole.

The spring member 4 in the above-described embodiment is used.
As 0, a coil spring can be suitably used instead of the flat spring 42. In this case, the shape of the coil spring,
The dimensions of the flat springs 42 can be changed by appropriately changing the design in accordance with the load of the building.
It is possible to exhibit an effect equal to or more than that of the spring member 40 by the above.

The seismic isolation foundation connecting apparatus 20 of the present invention configured as described above is applied to the connection between the base 10 and the foundation 30 in the foundation structure of a building, so that the vertical direction propagated from the ground during an earthquake. The expansion and contraction spring (compression coil spring 35) and the spring member 4
By the spring action of 0, a seismic isolation effect can be exerted. In addition, with respect to a horizontal surface wave propagated from the ground at the time of the earthquake, the elastic action of the curved spring piece 44 mounted in the circular fitting recess 34 of the base 32 and the displacement of the (compression coil spring 35) and the like. , Can exert the seismic isolation effect.

Next, a description will be given of an embodiment of a foundation structure of a building to which the above-described foundation coupling device 20 is applied, that is, an embodiment of a seismic isolation foundation structure. That is, FIGS. 7 to 9 show an embodiment of the base isolation structure. For convenience of explanation, the same components as those shown in FIGS. 1 to 6 are denoted by the same reference numerals and described.

FIG. 7 shows a schematic side view of the seismic isolation base structure, in which the upper part of the foundation 30 buried in the foundation ground 70 has:
The base 10 is mounted and fixed via the base connecting device 20 as appropriate,
A column base 12 or a bracing 14 is connected and fixed to an upper portion of the base 10 corresponding to the base connecting device 20, respectively. In this case, the foundation coupling device 20 is mounted on the base 1
0 with a mounting bolt 28,
The fixing to the foundation 30 by the anchor bolts 38 is as described above (see FIGS. 1 and 2).

When a building is constructed with the seismic isolation base structure thus configured, sufficient toughness and an effective seismic isolation effect can be exhibited for various loads applied to the building. .

FIG. 10 shows another embodiment of the seismic isolation structure of a building to which the above-described foundation coupling device 20 is applied. In this embodiment, in a building having the base isolation structure shown in FIG. 7, the base isolation coupling device 20 is also applied to a base part of a hut.

That is, in the hut assembly shown in FIG. 10, the eaves girder 90 connected to the upper end of each column base 12 is connected to the eaves girder 90 at a portion where the eaves girder 90 is connected to each column base 12 as described above. An eaves girder 91 parallel to the eaves girder 90 is connected and fixed to the upper part of the eaves girder via the device 20. In this embodiment, the upper part of the eaves girder 91 at the part connected to one of the foundation connecting devices 20 is further interposed with another eaves girder 92 which intersects, and the rafters 94 of the hut are connected.
To the upper part of the eaves girder 91 at the part connected to the one base connecting device 20,
And is fixedly connected to a rafter 94 of a hut assembly via a ridge.

With this configuration, it is possible to provide an effective seismic isolation effect even for a cabin combination.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the spirit of the present invention. Of course.

[0040]

As is apparent from the above-described embodiment, the seismic isolation base connecting device for a building according to the present invention is a device for mounting a base between a building foundation and a member supported on the upper part of the foundation. A base having a circular fitting recess fitted to and fixed to the base and the support member, respectively, and a lid, the base and the supporting member being provided. Are arranged in such a manner that the outer circumferences of these springs are surrounded by a plurality of adjacent curved spring pieces, and further extend outside the circular fitting recess with the base and the lid. And the cover plate are fitted and abutted via an expansion spring, and the base and the cover are configured to be displaceable in the vertical and horizontal directions, respectively, so that various loads given from outside the building can be applied. On the other hand,
Excellent seismic isolation effect can be exhibited. In particular, the seismic isolation effect can be effectively exerted not only on vertical surface waves of ground motions propagated from the foundation ground but also on horizontal surface waves.

Moreover, the seismic isolation foundation connecting apparatus according to the present invention has an advantage that it has a relatively simple structure, is strong and durable, and can be easily applied to the foundation structure of various buildings.

Therefore, according to the seismic isolation foundation structure to which the foundation coupling device having the above configuration is applied, it is possible to easily construct a building excellent in earthquake resistance.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view of a main part, showing an embodiment of a seismic isolation foundation connection device for a building according to the present invention, showing a configuration on a base side.

FIG. 2 is a side cross-sectional view of a main part, showing an embodiment of a seismic isolation foundation connection device for a building according to the present invention, showing a configuration on a foundation side.

FIG. 3 is a plan view of the base isolation coupling device shown in FIG. 2;

FIG. 4 is a bottom view of the base isolation coupling device shown in FIG. 1;

FIG. 5 is a side sectional view showing a main part of the seismic isolation foundation coupling device shown in FIGS. 1 and 2 in a longitudinally coupled state.

FIG. 6 is a side cross-sectional view of a main part showing a connecting state in a lateral direction of the base-isolated foundation connecting device shown in FIGS. 1 and 2;

FIG. 7 is a schematic configuration diagram showing one embodiment of a base isolation structure of a building to which the base isolation coupling device according to the present invention shown in FIGS. 1 to 6 is applied.

FIG. 8 is a schematic cross-sectional view of a main part of line BB of the building foundation structure shown in FIG. 7;

9 is a schematic cross-sectional view of a principal part taken along line CC of the building foundation structure shown in FIG. 8;

FIG. 10 is a schematic configuration diagram showing another embodiment of a seismic isolation structure of a building to which the seismic isolation foundation coupling device according to the present invention shown in FIGS. 1 to 6 is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Base 12 Pillar base 14 Bracing 20 Foundation connection device 22 Lid 24 Circular fitting concave part 25 Projection part 26 Cover plate 27 Bolt insertion hole 28 Mounting bolt 29 Nut 30 Foundation 32 Base 33 Locking projection 34 Circular fitting concave part 35 Compression Coil spring 36 Substrate 37 Bolt insertion hole 38 Anchor bolt 39 Nut 40 Spring member 42 Flat spring 43 Flat washer 44 Curved spring piece 70 Foundation ground 72 Channel steel plate 73 Rib plate 74 Concrete filling hole 76 Reinforcing bar 77 Mounting mortar 78 Concrete 80% Kuriishi 82 Discarded concrete 90, 91, 92 eaves girder 94 Rafter 96 or 98 Haze

Claims (6)

(57) [Claims] 1. A seismic isolation foundation coupling device installed between a foundation of a building and a member supported on the upper portion of the foundation, wherein the circular fittings are fitted to each other and fixed to the foundation and the support member. A base having a mating recess, and a lid, wherein a plurality of flat springs are stacked and arranged in a hollow portion where the lid and the base are fitted, and an outer periphery of the flat spring is surrounded by a plurality of adjacent curved spring pieces. The base and the lid are further fitted and abutted via a telescopic spring between the base plate and the lid plate extending outside the circular fitting recess with the base and the lid, and the base and the lid are connected to each other. A seismic isolation base connection device for a building, characterized in that it is configured to be vertically and horizontally displaceable. 2. The flat spring stored and arranged in the fitting hollow portion is made of a metal material having tough elasticity and rust-preventive effect, and a plurality of these flat springs are appropriately laminated via a flat plate washer. The top and bottom edges of the spring are respectively set to abut against the bottom surface of the circular fitting recess so that the base and the lid are separated from each other via the flat spring, and further oppose the outer peripheral portion of the laminated flat spring. 2. A seismic isolation foundation for a building according to claim 1, wherein a plurality of curved spring pieces are arranged adjacent to an inner peripheral portion of said circular fitting concave portion so as to have compressive elasticity in vertical and horizontal directions. Coupling device. 3. A plurality of compression coil springs are arranged in a balanced manner between a substrate and a cover plate facing each other in a base portion and a cover portion constituting a base coupling device, and the base portion and the cover portion are vertically arranged. 2. The structure according to claim 1, wherein the elastic displacement is possible.
The seismic isolation base connection device for the building described. 4. A seismic isolation foundation coupling device installed between a foundation of a building and a member supported on the top of the foundation, wherein the circular fittings are fitted and fixed to each other and fixed to the foundation and the support member, respectively. A base having a mating recess and a lid, wherein a coil spring is arranged in a hollow portion where the lid and the base are fitted, and the outer periphery of the coil spring is surrounded by a plurality of adjacent curved spring pieces. The base and the lid are further fitted and abutted via a telescopic spring between the substrate and the cover plate extending outside the circular fitting concave portion with the base and the lid, and the base and the cover are respectively moved in the vertical direction. And a seismic isolation base connecting device for a building characterized by being configured to be displaceable in a horizontal direction. 5. The coil spring housed and arranged in the fitting hollow portion is made of a metal material having tough elasticity and rust prevention effect, and the top and bottom of the coil spring respectively contact the bottom of the circular fitting recess. The base and the lid are set to be separated from each other via the coil spring, and a plurality of curved spring pieces are arranged adjacent to the inner periphery of the circular fitting recess so as to face the outer periphery of the coil spring. 5. The device according to claim 4, wherein the compression elasticity in the vertical and horizontal directions is provided.
The seismic isolation base connection device for the building described. 6. A plurality of compression coil springs are arranged in a balanced manner between a substrate and a cover plate facing each other in a base portion and a cover portion constituting a basic coupling device, and the base portion and the cover portion are vertically arranged. 5. An elastically displaceable construction.
The seismic isolation base connection device for the building described.