JP3088068B2 - Seismic reinforcement hardware 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 protecting a frame of a wooden house from an earthquake. In particular, in an existing wooden house, a corner of a wooden member is cut from the inside of the building without breaking an outer wall of a reinforcing portion of the building. This is related to the seismic retrofit hardware of a building that can be installed at the (corner).

[0002]

2. Description of the Related Art In a conventional wooden building framing method,
In order to protect the building from earthquakes, vertical struts are used to respond to earthquakes by providing braces, and in horizontal structures, structural plywood is directly attached to horizontal members to respond to the inner rigidity of the floor. This is generally well known as a general framing method.

[0003] Apart from the above-mentioned frame construction method, various hardware such as fired metal, braced plate, Yamagata plate, corner plate, etc. are provided. It is generally well known that ball-down hardware is provided for mounting on a pillar.

[0004]

However, in an existing house made of a conventional wooden frame method, the rigidity of the horizontal structure depends on the fire struts without fixing the floor to the horizontal members. The fact is that, since the fixing of the striking beam is also performed by bolting, the bolts are loosened due to aging and the arrangement of the striking beam is currently insufficient.

[0005] In addition, even in the case of existing wooden building bracing, a member having a large shape and size cannot be expected, and in a building having a large number of openings, there are many buildings that are insufficient in consideration of the wall volume ratio (amount of bracing). As well as misplacement,
In particular, there is a remarkable difference between before and after the new seismic standard, and even in buildings after the new seismic standard, even if they are satisfied with the wall volume ratio, there are many deformed buildings where the eccentricity tends to increase, and The wall arrangement balance was not satisfactory.

In addition, there are few cases in which a thick square compression member is arranged on a reinforcement, and the reinforcement of an existing wooden building is mainly used as a tension member. Therefore, when reinforcing an existing building with excessive tensile material, it is not suitable for reinforcing the foundation of the existing building unless foundation work is involved, and the existing building is not to be Reinforcement with bracing was structurally impossible.

[0007] The above-mentioned fired metal is also a material mainly used at the time of tension, and is a material used as reinforcement only for a horizontal structural member. Even if bolting is effective for tension, the wood part due to aging changes. The current situation is that the tightened portion of the bolt is loosened, and the loosened bolt is far from stiffening, so that there is a problem that the influence on the plastic fracture of the building is poor.

Since the above-mentioned bracing plate, chevron plate, and corner plate are also made of metal as a tensile material, the joint between the horizontal structure such as the base body difference and the girder and the vertical structure, the bracing, etc. When the existing building is reinforced with braced joints, there is a problem that there are restrictions and the cost is too high.

The above-mentioned hole-down hardware is a hardware mainly used for fastening a pillar and a base in a three-story wooden building, and is a hardware based on a tensile material. When mounting on the corners of the base and column, the foundation and base need to be reinforced with anchor bolts. For this reason, there was a problem that it could not be used as reinforcing hardware for existing buildings without foundation work.

[0010] As described above, existing wooden buildings have insufficient bracing, the bolts of the striking beam are loosened due to long-term use, and furthermore, the striking metal, bracing plate or e-beam. -Even if it is necessary to reinforce the building where the strength of the building is insufficient due to insufficient installation of conventional reinforcing hardware such as To add bracing or retighten loosened bolts in reinforcement work, scaffolding must be performed and the outer wall must be broken, and loosened bolts must be replaced in practice. Because of the problems described above, the cost was high and the reinforcement work became difficult in terms of cost, and there was a problem that the study on the seismic reinforcement had to be suspended.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to integrally form a bent side plate on two sides of a triangular plate made of an iron plate. A rubber plate is provided on the outer surface and formed on the corners of the building.
It is possible to install from the inside of the building without breaking the outer wall of the building against the loosening of the joint part due to unbalance of the load bearing wall or aging, strengthen the joint part, and reduce the natural period of the existing building An object of the present invention is to provide seismic reinforcement metal fittings for buildings to minimize the size and protect the buildings from seismic force.

[0012]

[MEANS FOR SOLVING THE PROBLEMS] In order to achieve the above object, a seismic retrofitting of a building according to the present invention has an isosceles triangular triangular plate portion made of an iron plate and having a right angle at one corner. The triangular plate has side plates that are bent from two sides sandwiching the right angle, and have corners integrally connected by welding to reinforce the strength of the horizontal structure of the existing building,
Earthquake by increasing rigidity of vertical structure and joint rigidity
Formed on the outer surface of the side plate part
Relax the impact of the compressive force applied to the contact surface with the wood
Rubber hardening that can reduce inset and reduce recoil
A rubber plate is installed and formed, and is attached to the inside corner from the inside of the existing building by screw nails and coach bolts through a number of through holes and small holes drilled in each side plate portion. I do.

[0013]

When the reinforcing metal of the present invention is provided at the corner of a building, the triangular plate acts as a compressive material by applying a compressive force applied to the connection, and the rubber plate provided at the side plate is made of wood. It has a cushioning effect to reduce the impact due to the compressive force applied to the contact surface with the part, so that it is possible to reduce penetration into the wooden part and obtain a vibration-isolating effect that makes it more tenacious.

When the reinforcing metal of the present invention is attached to the lateral member and the connection portion of the lateral member, the side plate is applied to the lateral member and attached with a screw nail and a coach bolt. It has an effect on the reduction of the strength of the fired beam due to the relaxation of the aging of the nail, and increases the horizontal rigidity of the existing building,
Reinforce the seismic strength of the horizontal structure of the existing frame structure.

When the reinforcing hardware of the present invention is attached to the connection between the horizontal member (base) and the column, the side plate portion is attached to the horizontal member and the column, and attached by the screw nail and the coach bolt. And strengthen the joints when compressive force is applied to the joints of the vertical structures, and reinforce the seismic resistance of the vertical structure of the existing frame structure.

[0016]

Embodiments will be described with reference to the drawings.
FIG. 1 is a perspective view of a seismic reinforcing metal fitting of the present invention, FIG. 2 is a developed view thereof, and FIGS. 3 and 4 are use state diagrams. A reinforcing metal fitting 1 is an isosceles triangular triangular plate having a right angle at one corner. And two side plates 3 and 4 bent from two sides sandwiching the right angle of the triangular plate portion 2, and adjacent two corners of the two side plate portions 3 and 4 are fillet welded 5. The two side plates 3 and 4 are formed integrally with rubber plates 6 provided on the entire outer surfaces of the two side plates 3 and 4. Each of the side plates 3 and 4 has a large number of through holes 7 and small holes smaller in diameter than the through holes 7. 7 'is drilled, a coach bolt 8 is inserted into the through hole 7, and a screw nail 8' is inserted into the small hole 7 '.
Are screwed together so as to be attached to the corner of the building.

As shown in FIG. 2, the two side plates 3 and 4 are integrally extended from the triangular plate 2, and the side plates 2 and 3 are bent along each side by bending. The triangular plate portion 2 is bent at a right angle through 9, 10
It is preferable to form them integrally. It is most preferable to use the coach bolts 8 and the screw nails 8 'to ensure the attachment of the existing building to the aged wood and to cope with the relaxation against vibration.

The reinforcing metal member 1 of the present invention is made of an iron plate having a thickness of 4.5 mm, two sides sandwiching a right angle are each 250 mm, the width of each of the side plate portions 3 and 4 is 45 mm, and the side plate portions 3 and 4 are formed.
The rubber plate 6 is made of a rubber material having a thickness of 7 mm using a rubber material having a rubber hardness that can reduce the impact due to the compressive force applied to the contact surface with the xylem, reduce the indentation into the xylem, and reduce the recoil. It is preferably formed as However, it is needless to say that the size is not necessarily formed and the size can be appropriately set.

The reinforcing metal member 1 of the present invention is provided at a position of a horizontal member 11 and a horizontal member (fire strut) 12 as shown in FIG. 3, and as shown in FIG. And vertical material 1
4, that is, the column and the base, the column and the body gap and the column, the column and the girder are joined to the corners, and the joints are solidified to provide resistance to the bending force generated in each part and to the side surfaces 3 and 4. Rubber plate 6 provided
Protects buildings from earthquakes by providing a cushioning action to reduce the impact applied to the contact surface with the xylem.

The reinforcing hardware 1 of the present invention can be provided at an opening (not shown) of a building to make up for the lack of bracing.

Regarding the strength of buildings during an earthquake,
Depending on the magnitude of the energy (seismic intensity, gal) at the time of the earthquake,
This is not necessarily the seismic intensity 0.2 (200 gal) according to the Building Standards Law. Therefore, when reinforcing the existing building using the reinforcing hardware 1 of the present invention, the eccentricity of the existing building is taken into consideration by taking into consideration the natural period of the ground in the site and the problem of how much the assumed seismic intensity should be. And reinforcing the metal fittings 1 in place based on the examination results. Reinforcement hardware 1 of the present invention
By increasing the number of installation locations, the seismic power can be made uniform. That is, the strength of the reinforced joints and the like of the reinforced frame is reinforced by examining the reinforced portions and the reinforced number of the reinforced hardware 1 of the present invention, and the entire building is converted into a rigid structure having higher rigidity. be able to.

[0022]

According to the present invention having the above-described structure, the reinforcing hardware of the present invention is provided as a material corresponding to a compressive force. It can be attached and reinforced at the connection part of the bolt that has been loosened by the aging of the frame when it is added to the object. The existing wooden building, which is a conventional method, is provided by providing it in places where the bracing is insufficient, where the bracing is difficult to install, and where the bracing material is thin and has low tensile strength. The joints of the framed structure are hardened, the joints with the reinforcing hardware of the present invention attached are given resistance to bending force, and the fire beams are reinforced on the horizontal structure of the existing building. To compensate for the imbalance in the placement of the physical strength wall It can be converted to a solid structure to prevent plastic destruction of existing wooden buildings, and the reinforcing metal of the present invention is provided as a reinforcing material for existing buildings. Because it can be installed from the inside of the building without peeling the outer wall, the installation is easy and convenient, the reinforcement cost is low, and furthermore,
Partial reinforcement is also possible, and there is an advantage that the required seismic strength required for existing buildings can be ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a reinforcing hardware of the present invention.

FIG. 2 is a development view of a reinforcing metal according to the present invention.

FIG. 3 is a perspective view showing a use state in which the reinforcing hardware of the present invention is installed on a horizontal member and a striking beam of the horizontal member.

FIG. 4 is a perspective view showing a use state in which the reinforcing hardware of the present invention is installed at corners of a pillar and a base.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforcement metal 2 Triangular plate part 3, 4 Side plate part 5 Corner welding 6 Rubber plate 7 Through hole 7 'Small hole 8 Coat bolt 8' Screw nail

Claims (1)

(57) [Claims] 1. A side plate portion having an isosceles triangular triangular plate portion made of an iron plate and having a right angle at one corner, the side plate portion being bent from two sides sandwiching the right angle of the triangular plate portion and the corner portions integrally connected by welding. The strength of the horizontal structure of the existing building
Reinforce, increase the rigidity of the vertical structure of the existing building and join
To increase the rigidity of the material and to form a material that responds to seismic force.
Due to the compressive force applied to the outer surface of the side plate
To reduce the impact on the wooden part and reduce the impact
It is formed by installing a rubber plate of rubber hardness that can reduce the size of the inside of the existing building by screw nails and coach bolts through a number of through holes and small holes drilled in each side plate .
Retrofit hardware of buildings that can be attached to Luo internal corner unit.