JP2821874B2 - Seismic isolation device and method of installing seismic isolation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a seismic isolation device and a method of mounting the same, and more particularly, to a seismic isolation device and a seismic isolation device mainly used for low-rise buildings such as ordinary houses. How to attach.

[0002]

A seismic isolation device mounted on the base of a structure to reduce the influence of the earthquake on the structure is known. However, the conventional seismic isolation device is intended for high-rise buildings. Most of what you do. As seismic isolation devices for low-rise buildings with three or less floors such as ordinary houses (hereinafter, "low-rise buildings" means buildings with three or less floors), seismic isolation devices are installed on concrete foundations. There is a method in which concrete for cloth foundation is poured on top. However, this method is used only when building a new building, and the seismic isolation device attached to the existing low-rise building is
Unknown at present. Therefore, there is a strong demand for a simple and inexpensive seismic isolation device that can be attached to new low-rise buildings as well as existing low-rise buildings.

[0003]

According to the present invention, there is provided, in accordance with the present invention, a seismic isolation device having a main seismic isolation support portion and an auxiliary seismic isolation support portion, wherein the main seismic isolation support portion is provided. A support body formed by alternately bonding a hard rubber and a damper having substantially the same planar outer shape with the hard rubber with an adhesive, a steel plate mounted on the upper side of the support body, and a lower part of the support body. A plurality of through holes are provided in the hard rubber, and the damper is made of a metal plate having a mesh-like structure provided with a large number of through holes, The auxiliary seismic isolation bearing section,
It has a bearing body formed by bonding a plurality of hard rubbers to each other with an adhesive, and a fixing device attached to a lower side of the bearing body for fixing the bearing body to a cloth foundation. On the foundation beam of the building to which the device is to be mounted, the reinforcement L should be in contact with the bottom and side surfaces of the foundation beam.
A seismic isolation device wherein a steel member is mounted, and a steel plate mounted on the upper side of the main body of the main seismic isolation bearing and the upper side of the supporting body of the auxiliary seismic isolation bearing are fixed to the reinforcing L-shaped steel material. An apparatus is provided.

Further, according to the present invention, there is provided a method of mounting a seismic isolation device having a main seismic isolation bearing portion and an auxiliary seismic isolation bearing portion on a building, wherein the main seismic isolation bearing portion comprises a hard rubber and a hard rubber. And a damper having substantially the same planar outer shape and a bearing body formed by alternately attaching the damper with an adhesive, and a steel plate attached to the upper and lower sides of the bearing body, respectively. Is provided with a plurality of through-holes, the damper is made of a metal plate having a mesh-like structure provided with a large number of through-holes, and the auxiliary seismic isolation bearings are formed by bonding a plurality of hard rubbers to each other with an adhesive. A method of attaching a seismic isolation device having a bearing body formed by laminating to a building, wherein the main seismic isolation bearing portion and the auxiliary seismic isolation bearing portion are fixed to a concrete foundation and a cloth foundation, respectively. Attaching a reinforcing L-shaped steel member to the foundation beam of the building so as to contact the bottom and side surfaces of the foundation beam; and fixing the main seismic isolation bearing and the auxiliary seismic isolation bearing to the reinforcing L-shaped steel. There is provided a method comprising:

[0005]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic plan view showing an arrangement state of the seismic isolation device of the present invention. The seismic isolation device of the present invention is roughly divided into a main seismic isolation bearing 10 and auxiliary seismic isolation bearings 30, 40, and 50. The main seismic isolation bearing 10 is attached to a bearing where a large seismic load acts during an earthquake. On the other hand, auxiliary seismic isolation bearings 30, 4
Nos. 0 and 50 are attached to places where a very large seismic load does not act during an earthquake (that is, places other than the main frame portion).

As shown in FIG. 2, the main seismic isolation bearing 10
Has a bearing body 12. The support main body 12 is formed by alternately bonding a hard rubber 14 having a circular thickness in a plan view and a constant thickness, and a damper 16 having substantially the same planar outer shape as the hard rubber 14 with an adhesive. As this adhesive, a known adhesive is used. In addition,
Hard rubber 14 is located on the uppermost and lowermost portions of the support body 12. As shown in FIG. 3, the hard rubber 14 has a plurality of through holes 14a. Through hole 14
“a” is useful for enhancing vibration damping when an earthquake load is applied. The damper 16 is preferably formed of a metal plate such as copper or lead, and has a mesh-like structure provided with a large number of through holes 16a as shown in FIG.

On the upper and lower sides of the support body 12, a steel plate 1 is provided.
8 and 20 are respectively attached. Steel plates 18, 20
May be attached to the bearing body 12 by bolts 22 as shown in FIG. 2, or an adhesive may be used. The steel plate 20 has holes 20 for anchor bolts for fixing the main seismic isolation bearing 10 to a concrete foundation.
a is provided. On the other hand, in order to reinforce the foundation beam of the building, an L-shaped steel member 24 is attached by a bolt 26 so as to contact the bottom and side surfaces of the foundation beam. A steel plate 23 having the same shape and dimensions as the steel plate 18 is attached by welding to a place where the support 10 is to be mounted. Then, by fixing the steel plate 23 and the steel plate 18 with the bolts 25, the foundation beam of the building is attached to the main seismic isolation bearing 10.

[0008] As shown in FIG.
0 has a bearing body 32. The support body 32 is formed by bonding a plurality of hard rubbers 33 having a certain thickness to each other with an adhesive. As this adhesive, a known adhesive is used as in the case of the bearing body 12. The bearing body 12 is fixed to the reinforcing L-shaped steel member 24 attached to the base beam by bolts 36 with an adhesive or bolts (not shown). On the other hand, a fixture 38 for fixing the support body 32 to the cloth base is attached to the lower side of the support body 32, typically by an adhesive. The fixture 38 shown in FIG.
Although it is formed in a “U” shape so as to straddle the upper end of the cloth foundation, in the other auxiliary seismic isolation bearings 40 and 50 shown in FIG. 1, the fixing tools 41 and 51 match the shape of the fixing place. It is shaped to be. The fixture 38 is fixed to the cloth foundation by bolts 39.

It is preferable that steel materials, bolts and the like used in the seismic isolation device and the method of mounting the seismic isolation device of the present invention be steel materials which have been subjected to a rust-proof treatment such as zinc plating.

The method of mounting the seismic isolation device configured as described above will be described separately for a new building and an existing building. In the case of a newly-built building, first, anchor bolts are set at locations where the main seismic isolation bearings 10 are to be mounted, and concrete is cast to form a concrete foundation.
After the concrete has hardened, the main seismic isolation bearing 10 is attached, and a nut (preferably a double nut) is attached to the anchor bolt.
To fix the main seismic isolation bearing 10 to the concrete foundation. On the other hand, the locations where the auxiliary seismic isolation bearings 30, 40, and 50 are to be mounted are cut out of boxes, and concrete is cast to make a fabric base. After the concrete in the fabric foundation has hardened,
The bolt 39 is pierced with a drill or the like.
Next, the main seismic isolation bearing and the auxiliary seismic isolation bearing are fixed to the concrete foundation and the cloth foundation by the anchor bolts and the bolts 39. Next, the L-shaped reinforced steel member 24 (accordingly, the base beam) is fixed to the main seismic isolation bearing 10 and the auxiliary seismic isolation bearings 30, 40, 50.

In the case of an existing building, since the beam serving as the base is fixed to the cloth foundation by the anchor bolt, first, the anchor bolt is cut and the anchor bolt of the concrete foundation is also cut. Next, the base beam is lifted by a hydraulic jack or the like, and the main seismic isolation bearing 10
A new concrete foundation with the required dimensions will be created using the existing concrete foundation at the location where it will be installed. When making a new concrete foundation, anchor bolts for fixing the main seismic isolation bearing 10 to the concrete foundation are installed. On the other hand, after the cloth base portion where the auxiliary seismic isolation bearing portions 30, 40, and 50 are to be mounted is shaved by a predetermined size and surface-finished, the mounting portion of the bolt 39 is drilled using a drill or the like. Next, the main seismic isolation bearing and the auxiliary seismic isolation bearing are fixed to the concrete foundation and the cloth foundation by the anchor bolts and the bolts 39. Next, the hydraulic jack is gradually lowered, the level is adjusted by the spacer 37, and when the required height is obtained, the L-shaped reinforced steel member 24 (therefore, the base beam) is moved to the main seismic isolation bearing 10 and the auxiliary seismic isolation bearing. Fix to 30, 40, 50.

The present invention is not limited to the above embodiments of the invention, and various modifications can be made within the scope of the invention described in the claims. It goes without saying that it is included in.

For example, in the above-described embodiment, the hard rubber 14 and the damper 16 of the main seismic isolation bearing 10 have a circular shape, but may have a rectangular shape or another appropriate shape. Good. In the above embodiment,
The hard rubber 14 of the main seismic isolation bearing 10 has a plurality of through holes 1.
Although 4a is provided, the through-hole 14a may not be provided. Further, the shape of the through hole 16a provided in the damper 16 is not limited to the shape shown in FIG.

[0014]

According to the present invention, a base seismic beam is reinforced by using an L-shaped steel material for reinforcement, so that a simple seismic isolation structure applicable to existing low-rise buildings can be obtained. Further, according to the present invention, it is possible to provide an inexpensive seismic isolation structure by using the main seismic isolation bearing and the auxiliary seismic isolation bearing together.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing an arrangement state of a seismic isolation device of the present invention.

FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1 and shows the main seismic isolation bearing 10;

FIG. 3 is a plan view taken along line 3-3 in FIG. 2 and shows the hard rubber 14 of the bearing main body 12 of the main seismic isolation bearing 10;

4 is a plan view along the line 4-4 in FIG. 2, showing the damper 16 of the bearing body 12 of the main seismic isolation bearing 10. FIG.

FIG. 5 is a view showing an auxiliary seismic isolation bearing unit 30,
(A) is a side view along the line 5a-5a of FIG. 1,
(B) is a sectional view taken along line 5b-5b of (a),
(C) is a sectional view taken along line 5c-5c of (a).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main seismic isolation bearing part 14 Hard rubber 16 Damper 24 L-shaped steel material for reinforcement 30, 40, 50 Auxiliary seismic isolation bearing part 33 Hard rubber 38 Fixing tool

Claims (2)

(57) [Claims] 1. A seismic isolation device having a main seismic isolation bearing and an auxiliary seismic isolation bearing, wherein the main seismic isolation bearing has a substantially same planar outer shape as hard rubber and hard rubber. And a steel sheet attached to the upper side of the bearing body, and a steel sheet attached to the lower side of the bearing body. Is provided with a plurality of through-holes, the damper is made of a metal plate having a mesh-like structure provided with a large number of through-holes, and the auxiliary seismic isolation bearings are formed by bonding a plurality of hard rubbers to each other with an adhesive. It has a support body formed by laminating, and a fixture attached to the lower side of the support body for fixing the support body to the cloth foundation, and is used as a base beam of a building to which a seismic isolation device is installed. Is
An L-shaped steel member for reinforcement is attached so as to be in contact with the bottom and side surfaces of the base beam, and a steel plate attached above the main body of the main seismic isolation support and the upper side of the support body of the auxiliary seismic isolation support are used for reinforcement. A seismic isolation device fixed to an L-shaped steel material. 2. A method of mounting a seismic isolation device having a main seismic isolation bearing and an auxiliary seismic isolation bearing on a building, wherein the main seismic isolation bearing is substantially made of hard rubber and hard rubber. A bearing body formed by alternately bonding dampers having the same planar outer shape with an adhesive, and a steel plate attached to each of the upper and lower sides of the bearing body, wherein the hard rubber has a plurality of A through-hole is provided, the damper is made of a metal plate having a mesh-like structure provided with a large number of through-holes, and the auxiliary seismic isolation bearing unit is configured to bond a plurality of hard rubbers to each other with an adhesive. A method for attaching a seismic isolation device having a formed bearing body to a building, comprising: a main seismic isolation bearing portion and an auxiliary seismic isolation bearing portion;
Fixing to a concrete foundation and a cloth foundation, respectively;
Attaching a reinforcing L-shaped steel member to the foundation beam of the building so as to contact the bottom and side surfaces of the foundation beam; and fixing the main seismic isolation bearing and the auxiliary seismic isolation bearing to the reinforcing L-shaped steel. A method comprising: