JP2935411B2 - Building seismic structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthquake-resistant structure of a building capable of exhibiting further earthquake-resistant performance.

[0002]

2. Description of the Related Art Conventionally, in addition to main structural members such as pillars and beams, reinforcing structures such as bracing and burning are used to construct a building to improve the strength of the building. Have been.

[0003]

However, in a conventional building constructed in this way, only the base is directly fixed to the cloth foundation, and the structural member framed above the base is It is only indirectly fixed via columns and the like, and in such a building, even if the rigidity in the horizontal direction can be increased by the combination of the reinforcing structural materials, it is necessary to increase the rigidity in the vertical direction. Had limitations.

[0004] For this reason, a conventional building can exhibit a certain level of seismic performance in the event of a rolling earthquake, but in the event of a pitching earthquake, the upper part of the base is higher than the base. There is a structural disadvantage that it tends to be unstable due to floating and the like, and in the worst case, there is a possibility that the building collapses due to this.

[0005] In view of the above points, the present applicant has conducted intensive studies in order to increase the rigidity not only in the horizontal direction but also in the vertical direction of the building and to further improve the seismic performance of the building. The present invention has been completed.

[0006]

That is, in the present invention, the stolen seismic structure of the present invention is provided on the upper end portion of the anchor bolt protruding from the upper surface of the base fixed on the cloth foundation by the anchor bolt, via a double nut. Tighten one end of a long bolt with thread grooves engraved on both ends, and
Via a nut to a horizontal member that hangs the other end above the base
Tightened, whereby the long bolt is stretched between the base and the horizontal member located above the base.

[0007] Such a building earthquake-resistant structure of the present invention can also be applied to a multi-story building. In this case, in each of two or more stories, the floor side of the lower floor of the story is connected to the floor. The end of the long bolt stretched between the two horizontal members on the ceiling side protrudes from the upper surface of the horizontal member on the floor side of the floor (that is, the horizontal member on the ceiling side of the lower floor of the floor), Connect one end of another long bolt to this with a double nut and
The other end of the long bolt is laid on the floor above the pier.
Tightening to the horizontal member of the ceiling river via a nut, and thus stretching the long bolt between the horizontal member on the floor side of the story and the horizontal member on the ceiling located above the horizontal member good.

Further, in the building earthquake-resistant structure of the present invention,
A plurality of short bolts having screw grooves engraved at both ends can be used as long bolts. Furthermore, two
One nut is higher than the other nut
It is preferred that it is not.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the building seismic structure of the present invention will be described below in detail with reference to the drawings. Here, FIG. 1 is a perspective view showing an example of the building earthquake-resistant structure of the present invention.

In the earthquake-resistant structure of the present invention, the anchor bolt 5 is buried in the cloth foundation 1 formed by casting concrete except for the upper end portion.
The upper end of the anchor bolt 5 is inserted into a bolt hole 2 ′ formed in the base 2, and the upper end of the anchor bolt 5 in which the screw groove is formed is projected on the upper surface of the base 2.
Is mounted on the cloth foundation 1, and then the base 2 is fixed on the cloth foundation 1 by screwing a double nut 6 to an upper end portion of an anchor bolt 5 protruding from the upper surface of the base 2. still,
In the figure, reference numeral 7 denotes a washer interposed between the double nut 6 and the base 2.

According to the present invention, one end of a long bolt 10 having a thread groove formed at each end is connected to the anchor via a double nut 6 screwed to an upper end portion of the anchor bolt 5. Along with the bolt 5, the long bolt 10 is stretched between the base 2 and the horizontal member 4 located above the base 2. In a building constructed by applying the earthquake-resistant structure of the present invention, the number of long bolts 10 that are fastened to the anchor bolts 5 and stretched between the two horizontal members 2, 4 may be changed as necessary. It is not necessary to correspond to all the anchor bolts 5 that are appropriately selected and used in such a building.

It is particularly important for the building earthquake-resistant structure of the present invention that a long bolt 10 stretched between the base 2 and the horizontal member 4 located above the base 2 is fastened to the anchor bolt 5. According to the present invention earthquake-resistant structure employing such a configuration, not only the horizontal direction but also the rigidity in the vertical direction of the building can be increased, and the seismic performance of the building can be further improved. it can.

That is, in the earthquake-resistant structure of the present invention, the two horizontal members 2 and 4 are pulled by the long bolt 10 stretched between the base 2 and the horizontal member 4 located above the base 2. In addition to being able to effectively prevent the building from being deformed by a horizontal load, the long bolt 1
0 is tied to the anchor bolts 5 embedded in the cloth foundation 1, so that even if it is subjected to a pitching earthquake, the portion above the base 2 does not rise and is built. The structure of the object can be maintained in a more stable state, and the rigidity in the vertical direction can be significantly increased.

Further, since the earthquake-resistant structure of the present invention utilizes the anchor bolts 5 buried in the cloth foundation 1, not only a newly constructed building but also an existing building can be used. The seismic structure of the present invention can be applied only by removing a part of the wall and drilling a bolt hole 2 ′ at a predetermined position of the horizontal member 4.

The building seismic structure of the present invention can also be applied to a multi-story building. FIG. 2 shows an example in which the building seismic structure of the present invention is applied to a multi-story building.

In such a case, as shown in the figure, in each of two or more layers, the upper portion of the long bolt 10 stretched between the horizontal members on the floor and the ceiling on the lower floor of the layer. The end of the side is projected on the upper surface of the horizontal member 4 on the floor side of the layer (that is, the horizontal member on the ceiling side of the lower floor of the layer). One end of the bolt 10 is tightened, and the long bolt 10 is stretched between the horizontal member 4 on the floor and the horizontal member 4 ′ on the ceiling located above the horizontal member 4 of the story. Thus, even in a multi-story building such as a two-story or three-story building, the seismic performance can be further improved.

In the present invention, as the double nut 6 for fastening the anchor bolt 5 and the long bolt 10, for example,
As shown in FIG. 3, one obtained by joining two hexagon nuts using appropriate means such as welding is used. Further, as shown in the figure, it is preferable that the height of one nut is higher than that of the other nut, and the height of the double nut 6 is increased by configuring the double nut 6 in this manner. In the same manner as a normal hexagon nut is screwed to a part with a wrench, a wrench can be engaged and screwed from six directions, or an eyeglass wrench or a box wrench can be engaged and screwed. FIG. 4 is a sectional view taken along line IV-IV in FIG.

Further, when the long bolt 10 is tightened to the upper end portion of the anchor bolt 5 through the double nut 6, when the anchor bolt 5 is embedded in the cloth foundation 1, the embedding position is set to the cloth. Even when the base 1 is shifted from the center in the width direction (normally, a steel frame is buried in the center in the width direction of the cloth base 1, and the anchor bolt 5 is buried in the center in the width direction of the cloth base 1. Is difficult), FIG. 5
As shown in the figure, two nuts 6 constituting the double nut 6
The nut 6b, which is not screwed to the anchor bolt 5 among the nuts 6a and 6b, is positioned on the center line of the base 2, and the long bolt 10 is screwed to the nut 6b, so that the long bolt 10 is positioned on the center line of the base 2. Can be positioned so that the tension exerted by the long bolt 10 on the two cross members 2 and 4 is not biased. The two-dot chain line shown in the figure is the center line of the base 2.

Further, in the building earthquake-resistant structure of the present invention, the long bolt 10 must be at least longer than the ceiling height, but such a long bolt 10 is inconvenient for storage and transportation. Therefore, in the present invention, a plurality of short bolts 8 provided with thread grooves at both ends thereof are longer than at least the ceiling height using a long nut 9 or a turnbuckle or the like so as to facilitate the handling. The bolts connected in such a manner can be used as the long bolt 10.

[0020]

As described above, according to the building seismic structure of the present invention, the long bolt stretched between the base and the horizontal member located above the base is connected to the anchor bolt. This makes it possible to increase the rigidity not only in the horizontal direction but also in the vertical direction of the building, and the seismic performance of the building can be further improved. Furthermore, the earthquake-resistant structure of the present invention can be applied not only to a newly constructed building but also to an existing building.

Further, when the long bolt is fastened to the anchor bolt via the double nut, when the anchor bolt is embedded in the cloth foundation, the embedding position is shifted from the center in the width direction of the cloth foundation. However, since the long bolt can be screwed to the anchor bolt so that the long bolt is located on the center line of the base, the tension exerted on the two horizontal members by the long bolt is not biased. can do. If a plurality of short bolts having screw grooves formed at both ends are connected and used as a long bolt, the handling becomes easy. In addition, one nut is used as a double nut.
Use a nut whose height is higher than that of the other nut.
If it is, you can use a regular wrench or
Engage a box wrench etc. and easily tighten the screws
There is an advantage that can be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a building earthquake-resistant structure of the present invention.

FIG. 2 is a perspective view showing another example of the building earthquake-resistant structure of the present invention.

FIG. 3 is a drawing showing an example of a double nut used in the building earthquake-resistant structure of the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a diagram illustrating a state in which a double nut is screwed to an upper end portion of an anchor bolt in the building earthquake-resistant structure of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cloth foundation 2 Base 5 Anchor bolt 4, 4 'Horizontal material 6 Double nut 8 Short bolt 10 Long bolt

Claims (4)

(57) [Claims] 1. An end of a long bolt having a thread groove at both ends via a double nut at an upper end portion of the anchor bolt protruding from an upper surface of a base fixed on a cloth base by the anchor bolt. And take the long
The nut is attached to the horizontal member that hangs the other end of the
A seismic structure for a building, characterized in that a long bolt is stretched between a base and a horizontal member located above the base. 2. In each of two or more stories of a multi-story building, an end of a long bolt stretched between two horizontal members on the lower floor and the lower ceiling of the story is attached to the said story. of allowed projecting on the upper surface of the horizontal member of the floor side, while Tightened one end of another long bolt through the duplicate nut thereto, such long
A ceiling that hangs the other end of the length bolt above the floor-side horizontal member
And a long bolt is stretched between the horizontal member on the floor side of the floor and the horizontal member on the ceiling located above the horizontal member. Item 4. An earthquake-resistant building according to item 1. 3. A long bolt which is formed by connecting a plurality of short bolts each having a thread groove at each end.
Or the building seismic structure described in 2. 4. The height of one nut of the double nut is equal to that of the other nut.
The nut according to any one of claims 1 to 3, wherein the height is higher than the height of the nut.
The building's seismic structure described in.