JPH11193652A - Base isolation construction for light weight structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation construction for a light weight structure, capable of realizing base isolation effect without giving a poor appearance and causing any problems if a roof is formed above a porch. SOLUTION: A base isolation construction has a frame body 7 formed in a shape corresponding to the outer peripheries of a porch P and a hallway H, to the outer peripheries of a service entrance and a terrace or to the outer periphery of a bench, a base isolation device 2 with the upper face supporting the lower face of the frame 7 and the lower face placed and fixed to the upper face of a footing concrete 1 and a floor plate 15 placed and fixed to the inside of the frame 7 to form the floors of the porch P and the hallway H, the floors of the service entrance and the terrace or the floor of the bench. On the upper face of the frame 7 on which the floor plate 15 is placed and fixed, a sill 9 is placed and fixed to construct a light weight structure thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation structure for a light-weight structure such as a detached house used for protecting a building from vibrations caused by an earthquake. It relates to a seismic isolation structure at the entrance porch and entrance, or at the entrance and terrace or porch.

[0002]

2. Description of the Related Art As is well known, as a conventional seismic isolation device for protecting a building from vibrations caused by an earthquake, (1) a structure in which an upper structure is supported from below by a laminated rubber in which rubber and iron plates are alternately stacked. (2) A device that absorbs vibrations caused by an earthquake with a damper device (3) A device that insulates the ground or a foundation from an upper structure is proposed. And
For example, as the insulation method (3), a method of floating a structure by liquid or magnetism, a method of sliding a ground or a foundation and an upper structure (sliding bearing), or a method of rolling a sphere such as a ball bearing are used. Various things have been proposed. Moreover, in the conventional seismic isolation device or seismic isolation structure, the above-mentioned (1)
It has been proposed to use the device or structure of (2) in combination with the device or structure of (2) or to use the device or structure of (1) in combination with the device or structure of (3).

[0003]

When the seismic isolation structure using such a seismic isolation device is applied to a light-weight structure such as a detached house, it is possible to perform the seismic isolation of the entire structure. For example, since the structure is continuous from the stairs to the porch and from the porch to the entrance provided in the structure, the structure from the porch to the entrance or the structure from the stairs to the porch is required when seismic isolation of the entire structure is intended. The challenge is how to design Therefore, for example, a structure in which the structure to be seismically isolated is set up to the entrance and the porch and the entrance are separated can be considered. However, since the porch and the entrance are separated by a door or a sliding door, the formation of a groove between the porch and the door or the sliding door not only has a problem in appearance, but also has a problem in appearance. Above, a roof integrated with the structure is formed and pillars supporting the roof are often formed on both sides of the porch. It is practically difficult to separate the structure from the structure. Similarly, when a service entrance and a terrace or a stand are provided in a detached house, there is basically a similar problem.

[0004] Therefore, the present invention is intended to solve the problems in applying a conventionally proposed and partially practical seismic isolation device to a light-weight structure such as a detached house, for example, a structure from a porch to an entrance. It has been proposed in order to solve the above-mentioned problems having not only the same appearance but also the seismic isolation effect without any problem even when the roof is formed above the porch. It is an object of the present invention to provide a seismic isolation structure of a light weight structure that can be used.

[0005]

Means for Solving the Problems The present invention has been proposed to achieve the above object, and the first invention (the invention described in claim 1) corresponds to the outer peripheral shape of the porch and the entrance. And a frame corresponding to the outer shape of the entrance and the terrace, or an outer shape such as a rim, and the upper surface supports the lower surface of the frame and the lower surface is placed and fixed on the upper surface of the foundation concrete. And a floor plate that is placed and fixed inside the frame body and forms a porch and a floor of a front entrance or a floor of a self-service entrance, a floor of a terrace or a floor of a pedestal, and the floor plate is placed and fixed. The base constituting the lightweight structure is placed and fixed on the upper surface of the frame. The seismic isolation device according to the present invention supports the upper structure from below by means of a laminated rubber in which rubber and iron plates are alternately superposed. The so-called rubber seismic isolation, or the structure is levitated by liquid or magnetism. It may be one that slides on the ground or foundation and the upper structure (sliding bearing), or one that rolls a sphere such as a ball bearing.

Further, the second invention (the invention according to claim 2)
In the first invention, a step is formed on a front end side of the floor plate, and an upper surface of an uppermost step of the stairs is slightly opposed to a lower surface of a front end side of the floor plate. Things.

The third invention (the invention according to claim 3)
According to the first or second aspect of the present invention, a base is fixed to an upper surface on the porch side, the terrace side, or the rim side of the frame, and a pillar is fixed to the upper surface of the base. It is assumed that.

[0008] According to the first to third inventions, particularly the first invention, the porch to the floor from the entrance, the terrace from the entrance, or the rim from the structure is formed by a floor plate supported inside the frame. Therefore, no groove is formed between the porch and the entrance, between the entrance and the terrace, or between the structure and the pedestal. Even if a roof is formed above the porch, above the terrace, or above the rim, etc., the pillars supporting the roof are fixed on the floorboard that becomes the floor of the porch, etc. Therefore, it is possible to effectively prevent a situation in which the roof above the porch or the like does not become integral with the structure simply by adopting the seismic isolation structure. Further, according to the second invention, since the lower surface on the tip side of the floorboard is located on the upper surface of the uppermost step of the staircase, no groove is formed between the staircase and the tip of the floorboard. The appearance is also good.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a seismic isolation structure for a light-weight structure according to the present invention will be described in detail with reference to the drawings. Note that the seismic isolation structure of the light-weight structure according to this embodiment is an application of the present invention to a detached house having a porch at the entrance.

In this seismic isolation structure, as shown in FIG. 1, a large number of seismic isolation devices 2 are fixed on a foundation concrete 1. As shown in FIG. 2, the seismic isolation device 2 constituting this embodiment is fixed on the foundation concrete 1 or is fixed to the foundation concrete 1 via a fixing plate (not shown), and a concave portion ( (Or concave surface) 3a, an upper support plate 4 provided above the lower support plate 3 and having a recess (or concave surface) 4a formed on the lower surface, and a lower support plate 3 And a sphere 5 interposed between the upper bearing plate 4 and the upper bearing plate 4. Therefore, the lower bearing plate 3 fixed to the foundation concrete 1
However, even when it is subjected to earthquake vibration, the vibration is not transmitted to the upper support plate 4. In the present embodiment,
As shown in FIG. 1, each of the seismic isolation devices 2 is fixed below each of the columns 6 constituting the structure. And
In each of the seismic isolation devices 2, a frame 7 constituting the present invention is fixed on the seismic isolation device 2 at a position where the porch P and the entrance H are provided. The frame 7 is formed of a steel material into a shape corresponding to the outer peripheral shape of the porch P and the entrance H, and is formed on the porch P side as shown in FIGS. End plate portions 7a each having a length corresponding to the width, and right and left side plate portions 7 welded to the left and right ends of the front end plate portions 7a and formed from the porch P side to the house side.
b, 7c, a rear end plate 7d whose both ends are welded to the front ends of these left and right side plate portions 7b, 7c, and which is made parallel to the front end plate portion 7a, this rear end plate portion 7d, and the front end plate portion 7a. And an intermediate plate portion 7e whose both ends are welded to the inner surfaces of the left and right side plate portions 7b and 7c.
The overall planar shape is substantially a letter-like shape. Also, as shown in FIG. 3 or FIG. 4, the inner surface of the rear end plate portion 7d of the frame 7 and the inner surface of the rear end side of the left and right side plate portions 7b and 7c are L-shaped. Are welded.

A wooden base 9 is fixed to the upper surface of the frame 7 constructed as described above. In the present embodiment, the base 9 is not fixed to the entire upper surface of the frame 7, but the end plate 7 a constituting the frame 7.
Is not fixed to the upper surface of the left side plate portion 7b on the porch P side. However, on the base end side of the upper surface of the left side plate portion 7b, a base 12 to which lower ends of first and second roof support columns 10, 11 for supporting a roof (not shown) provided above the porch P are fixed. Has been fixed. Therefore, on the upper surface of the seismic isolation device 2 other than the seismic isolation device 2 that supports the frame 7 (the upper support plate 4 constituting the seismic isolation device 2), the base 9 is horizontally positioned as shown in FIG. As shown in FIG.
A base fixing member 13 having the same height as that of the base is fixed.

On the frame 7 and inside the frame 7, as shown in FIG. 5, the porch P and the entrance H
Is fixed. The floor plate 15 is a substrate 1 made of a precast concrete plate.
5a and a mortar 15 on the upper and front surfaces of the substrate 15a.
and floor tiles 15c adhered through b. The mortar 15b applied to the upper surface of the substrate 15a is inclined such that the upper surface of the floor plate 15 is gradually lowered from the entrance H to the tip of the porch P. Further, the tip of the floor plate 15 configured as described above projects slightly outward from the tip plate portion 7a constituting the frame 7, and a stair 16 is provided below the tip side of the floor plate 15. Is formed. The stairs 16 are formed from concrete slightly above the ground and upward from concrete, and in the present embodiment, a first upright portion 16a rising from the ground and the first upright portion 16a A first horizontal portion (first step) 16b formed horizontally from the upper end of the first horizontal portion 16a; a second rising portion 16c rising upward from the front end of the first horizontal portion 16b; A second horizontal portion (second step) 16d formed horizontally from the upper end of the upright portion 16c, a third upright portion 16e rising upward from the front end of the second horizontal portion 16d, A third horizontal portion 16f is formed horizontally from the upper end of the third upright portion 16e and faces the lower surface on the distal end side of the floor plate 15. In the present embodiment, the third horizontal portion 16f and the lower surface of the floor plate 15 are approximately 20
mm to 30 mm, and the first
The same tiles (not shown) as the floor tiles 15c affixed to the upper surface of the floorboard 15 are attached to the second to second horizontal portions 16b and 16d and the first to third upright portions 16a, 16c and 16e. Have been.

Therefore, according to the seismic isolation structure of the light-weight structure according to the above-described embodiment, when an earthquake occurs,
With the seismic isolation device 2, the whole structure supported by the seismic isolation device 2 is protected from the vibration of the earthquake. Here, in the structure according to the above embodiment, the floorboard 1
Each of the porch P and the entrance H formed by 5 is mounted and fixed on a frame 7, and the frame 7 is supported by six seismic isolation devices 2 (part of the structure is Therefore, the porch P is also protected from earthquake vibration. Therefore, like the structure according to the present embodiment,
Even if the first and second roof support pillars 10 and 11 are fixed to the porch P and the roof (not shown) is integrally formed with the structure, no problem occurs. In addition, as described above, the porch P and the entrance H are continuous by the floor plate 15 and are seismically isolated by the seismic isolation device 2.
It is not a structure in which only the entrance H is seismically isolated. Therefore, unlike the case where the entrance H and the porch P are separated from each other, a groove is not formed between the entrance H and the porch P. it can. Furthermore, in the present embodiment, the porch P and the stairs 16 for ascending the porch P are such that the upper surface of the third horizontal portion 16f formed on the stairs 16 is slightly lower than the lower surface on the tip end side of the floor plate 15. The structure that is separated and opposed is adopted, and since the groove formed between the stairs 16 and the floor panel 15 is not exposed from above, the appearance is not impaired from this point as well.

In the above embodiment, the floor plate constituting the present invention is shown and described as being made of a precast concrete plate. However, this floor plate is not only made of such a precast concrete plate.
It may be made of lightweight cellular concrete or deck plate. Further, in the above-described embodiment, the floor plate supported by the intermediate plate portion 7e constituting the frame 7 and the L-shaped support fitting 8 welded to the frame 7 has been illustrated and described. Not only such a configuration, but also as shown in FIG.
d, and the angle 20 may be welded from the right side plate 7c to the rear end plate 7d to be supported by the upper surface of the intermediate plate 7e and these angles 20. Further, in the above-described embodiment, the seismic isolation device constituting the present invention is illustrated and described as including the lower bearing plate 3 and the upper bearing plate 4 in which the spheres 5 are disposed. The seismic isolation device to be constructed is not only such a structure, but also supports the structure from below by a laminated rubber in which rubber and iron plate are alternately laminated. So-called rubber seismic isolation, and floats the structure by liquid or magnetism. Or a so-called sliding bearing that slides the ground or foundation and the upper structure. In addition, in the above embodiment, the frame constituting the present invention has been described by illustrating a steel material formed in the shape of a Japanese character, but the material of the frame does not necessarily need to be a steel material. It may be molded into a frame shape from wood, and the shape of this frame body is not limited to the above-mentioned shape as long as it is at least a shape corresponding to the shape of the porch and the entrance. An appropriate shape may be used according to the shape of the structure, the shape of the entrance or the shape of the porch.

Further, the seismic isolation structure of the light-weight structure according to the above-described embodiment is one in which the present invention is applied to a detached house having a porch at the entrance as described above. The invention is not limited to the above-described embodiment, and the invention may be applied to a light-weight structure in which a terrace is formed at an arbitrary opening, and furthermore,
An edge stand or the like may be formed.

[0016]

As is apparent from the above description of the seismic isolation structure for light-weight objects according to the embodiment of the present invention, in the present invention, the porch connected to the entrance is also seismically isolated.
Apart from the porch, since only the entrance is not a structure that is seismically isolated integrally with the structure, the groove is not exposed between the entrance and the hoch, and the appearance is adopted by adopting the seismic isolation structure Damage can be effectively prevented. In particular, if this seismic isolation structure is adopted, there is no problem even when a pillar is provided on the porch and the pillar forms an integral or continuous roof with the structure above the porch.

In particular, in the second invention, a stair is formed on the tip side of the floor plate, and the upper surface of the uppermost step of the stair is slightly opposed to the lower surface on the tip side of the floor plate. Not only does the stairs and the porch not be destroyed due to the occurrence of the above, but the gap between the stairs and the porch is not exposed upward, so that the appearance can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a seismic isolation structure of a light weight structure according to one embodiment of the present invention.

FIG. 2 is a side sectional view showing a configuration of a seismic isolation device and a structure on a porch side supported by the seismic isolation device.

FIG. 3 is a plan view showing a frame.

FIG. 4 is a perspective view showing a main part of a fixed state of a support bracket formed on a frame body.

FIG. 5 is a side sectional view showing an embodiment according to the present invention.

FIG. 6 is a plan view showing another configuration of the frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foundation concrete 2 Seismic isolation device 6 Column 7 Frame 9 Base 15 Floor plate 16 Stairs 16f Third horizontal part P Porch H Entrance

Claims (3)

[Claims] 1. A frame having a shape corresponding to the outer shape of the porch and the entrance, or a shape corresponding to the outer shape of the access opening and the terrace, or an outer shape such as a rim, and the upper surface is formed on the lower surface of the frame. The seismic isolation device, which is supported and fixed on the upper surface of the foundation concrete, is fixed on the inside of the frame, and is fixed on the inside of the above frame to form the porch and the floor of the entrance or the floor of the entrance and the floor of the terrace or the floor of the pedestal etc. And a base that constitutes the lightweight structure is mounted and fixed on the upper surface of the frame on which the floor plate is mounted and fixed. 2. The staircase is formed at the front end of the floor plate, and the upper surface of the uppermost stage of the staircase is slightly opposed to the lower surface of the front end of the floor plate. Seismic isolation structure for light weight structures. 3. A base is fixed to an upper surface of the frame on the porch side, the terrace side, or the rim side, and a pillar is fixed to the upper surface of the base. Seismic isolation structure of the light weight structure described.