JPH0978694A - Earthquake resistant reinforcing metal fittings of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reinforce a building by fixing metal fittings at corners thereof from the inside thereof, by use of reinforcing metal fittings in which a set of piercing holes and a number of small holes to fasten a bracing are bored, at a triangle plate with a plurality of pierced holes and small holes. SOLUTION: Two pierced holes 11a, 11b for bolts to fasten a bracing 13 are bored near the side at a specified distance in a triangle plate. Three small nail holes 12a are appropriately bored along the side of one pierced hole 11a and the same small nail holes 12b are appropriately bored along the side of the other pierced hole 11b and further, five small holes 12c are appropriately bored between the pierced holes 11a, 11b. The bracing 13 is fastened with bolts and nails in accordance with the direction of the bracing 13 through one pierced hole 11a, 11b and six small holes 12a, 12c or 12b, 12c. The bracing 13L is fastened by use of one pierced hole 11a, three small holes 12a, and three small holes 12c selected from five holes positioned at the middle for instance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for protecting a wooden house frame from an earthquake, and in particular, it can be installed at a corner (entrance) of a member of a building and at the same time, braces can be fastened. The present invention relates to a seismic reinforced metal fitting for a building in which the mouth portion is hardened to enhance the horizontal rigidity of the building.

[0002]

2. Description of the Related Art In the conventional frame construction method for wooden structures,
In order to protect the building from earthquakes, braces are provided on the vertical structure to deal with earthquakes, and on horizontal structures, structural plywood is directly attached to the horizontal members to support the inner surface rigidity of the floor. This is generally well known as a general frame construction method.

In the above-mentioned frame construction method, various metal objects such as struck metal objects, bracing plates, mountain plates, corner plates, etc. are provided, and in the wooden three-story building, the foundation and pillars are provided. It is generally well known that mounting hall-down hardware is provided.

[0004]

However, the rigidity of the horizontal construction surface of the existing house constructed by the conventional wooden frame construction method depends on the striking beam instead of fixing it to the horizontal member of the floor. The actual situation is that since the fixing of the striking beam is done by bolt tightening, the bolt loosens due to aging and the placement of the striking beam is insufficient.

Further, even in the braces of an existing wooden building, a member having a thick shape and dimension cannot be expected, and there are few cases in which a thick square bar is arranged as a compression material in the bracing, so that the braces of an existing wooden building are Paddles are mainly used as tensile materials. In particular, the angle of the braces that can be inserted into the three-story pillar is 73 degrees to 75 degrees.
It is difficult to expect the effect as a brace because it becomes a steep angle, and when the tensile force acts on the brace that was supposed to be a compression material, there is a problem that it can not stand pulling out and it comes off. In the case of a building with many openings, considering the wall volume ratio (the amount of bracing), not only many buildings are lacking, but also the layout tends to be inadequate. Furthermore,
There are striking differences between before and after the new seismic code. Even in the buildings after the new earthquake resistance standard, even if the wall volume ratio was satisfied, there were many deformed buildings with eccentricity tending to be large, and the arrangement balance of load bearing walls was not satisfactory.

[0006] The above-mentioned flint metal is a material used for reinforcement of horizontal structural materials, and although tightening by bolts is effective for tensioning, the tightening portion of the wooden part loosens due to aging. However, there is a problem that the loosened bolt is far from being rigid, so that it has little influence on the plastic fracture of the building. In addition, the Yamagata
Since the gutter and the corner plate are hardware for dealing with the tensile force, they are merely for joining the joints between the horizontal structural members such as the base body difference and girders and the vertical structural members. -G is a metal for fastening braces, but there was a problem in use as a metal for reinforcing existing buildings.

The above-mentioned hole-down hardware is a metal used mainly for fastening a horizontal material such as a pillar and a base in a three-story wooden structure, and is a metal based on tensile force. When it is attached to the corners of the foundation and pillars of an existing building, the anchor bolts lack the strength, which requires a lot of cost for the foundation work, which is a costly problem as a reinforcing metal for the building.

As described above, the existing wooden building has insufficient braces, or even if braces are provided, the installation state is incomplete and the effect of bracing cannot be expected. Furthermore, the strength of the building is lacking due to the insufficient number of conventional reinforcing metal fittings such as flint metal fittings, bracing plates and hole-down metal fittings, or the installation bolts loosening due to aging. Even if it is necessary to reinforce the existing building, in the work to reinforce the existing building, in order to add braces or refasten the loosened bolt, it is necessary to scaffold and destroy the outer wall, and moreover, Since there is a problem that the loosened bolts must be actually replaced, the cost becomes high and the reinforcement work becomes difficult in terms of cost, and there is a problem that the examination of seismic reinforcement must be interrupted. .

The present invention has been made in view of the above problems, and an object of the present invention is to provide a wooden structure by an existing frame construction method with a shortage of braces and an imbalance of bearing walls. Or against loosening of the joint part due to secular change, it is possible to attach from the inside of the building without breaking the outer wall of the building, while reinforcing the joint part, it has a structure that can be tightened in a bracing manner, (EN) Provided is a seismic reinforced metal fitting for a building, which can be strengthened by being integrated with a tensile strut to strengthen the structure.

[0010]

In order to achieve the above object, a seismic resistant metal fitting for 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 portion has side plate portions which are respectively bent from two sides sandwiching a right angle and whose corner portions are integrally connected by welding, and a rubber plate is installed on the outer surface of the side plate portion to form the side plate portion. A plurality of through holes for lug bolts attached to the corners and a plurality of small holes for screw nails are bored, and the triangular plate portion has one through hole and a nail for bolts for fastening braces. It has a large number of small holes for use.

As the reinforcing metal member, an iron plate having a thickness of 4.5 mm is used, two sides sandwiching a right angle are set to 250 mm, widths of the side plate portions are set to 45 mm, and a rubber plate to be attached to the side plate portion is a wooden part. It is preferable to use a rubber material that can relax the impact due to the compressive force applied to the contact surface and reduce the penetration into the wood portion and the recoil.

In the triangular plate portion, two through holes for bolts for fastening the braces are formed at a predetermined distance in the vicinity of the side c, and a position along the side a of the one through hole. A plurality of small holes for nails are formed at predetermined intervals, and a plurality of small holes for nails are formed at a position along the side b of the other through hole.
It is preferable to form a plurality of small holes for nails between the two through holes.

In the triangular plate portion, two through holes for bolts for fastening the braces are formed at predetermined intervals in the vicinity of the side c, and the position of the one through hole along the side a. 3 small holes for nails are formed at a predetermined interval, and 3 small holes for nails are formed at positions along the side b of the other through hole.
5 small holes for nails are formed between the 2 through holes,
The two through holes for the bolts and the many small holes for the nails provided around these two through holes have a wall length of 3 shaku,
Arranged so that the braces can be tightened with 1 through hole and 6 small holes, depending on the braces placed in 4.5 and 6 scales or depending on the orientation of these braces. Preferably.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an earthquake-proof reinforcing metal fitting of the present invention, FIG. 2 is a developed view thereof, and a reinforcing metal member 1 is made of an iron plate. It has an isosceles triangular triangular plate portion 2 which has a right angle on one side and two sides a and b which sandwich the right angle are equal, and side plates which are respectively bent from two sides a and b which sandwich the right angle of the triangular plate portion 2. In addition to having the portions 3 and 4, the adjacent corner portions 5 of the side plate portions 3 and 4 of the two sides a and b are integrally connected by fillet welding, and the side plate portions 3 and 4 of the two sides a and b are connected. A rubber plate 6 is formed on the entire outer surface, and a large number of through holes 7 and small holes 8 having a diameter smaller than that of the through holes 7 are formed in the side plate portions 3 and 4, respectively. The screw nail 10 is inserted into the small hole 8 so that the screw nail 10 can be attached to the corner of the building. Has one through-hole 11 for bolts, and a plurality of nail holes 12 for nails arranged around the through-hole 11, and these one through-hole 11 and many nail holes 12 are formed. As shown in FIG. 5, the braces 13 are configured so that they can be tightened with one bolt 14 and many nails 15.

[0015]

Example: The reinforcing metal 1 has a buckling allowable moment of 3
The side plate portions 3 and 4 of the two sides a and b which sandwich the right angle are formed by using iron plates having a thickness of 48 kg and a thickness of 4.5 mm, and have a width of 45 mm and a length of 250 mm. Then, the side plate portions 3 and 4 are integrally extended from two sides of the triangular plate portion 2 as shown in FIG. 2 in a developed manner, and are bent at right angles through the bending lines 16 and 17 of the respective sides by bending. It is bent and formed integrally with the triangular plate portion 2. The rubber plates 6 attached to the side plate portions 3 and 4 are formed of a rubber material that can reduce the impact of the compressive force applied to the contact surface with the wood to reduce the penetration into the wood and the recoil. . Furthermore, each side wall part 3 and 4 is provided with three through holes 7 for lug bolts and four small holes 8 for screw nails in two rows, for a total of eight holes, and a pull-out proof strength of 292.44 kg. It is preferable to use the lag bolt 9 and the screw nail 10 having a pull-out proof strength of 204 kg. However, it is needless to say that the size is not necessarily set to the above size, and the size can be appropriately set.

The pull-out strength of the joining member in each of the side plate portions 3 and 4 of the reinforcing metal member 1 is 3 rugged bolts 9
And the total pulling force of 8 screw nails 10 is 25
Although it is 09 kg, it is 457.4 in the allowable moment.
kg. Therefore, the total allowable moment of the side plate portions 3 and 4 on the two sides a and b is 915 kg. Therefore. Since the tensile force generated in the column on the tension side in the bisector (wall magnification 2.0) is 726 kg, the side plate portions 3 and 4 on the two sides are
The total allowable moment of 915 kg is 871.2 kg even if the safety factor is removed, and it is possible to obtain a sufficient proof stress corresponding to a bisected bracing.

In the triangular plate portion 2, two through holes 11a and 11b for bolts for fastening the braces 13 are bored at a predetermined interval in the vicinity of the side c, and the one through hole 11 is formed.
Three small holes 12a for nails are formed at appropriate positions along the side a of a, and three nails 12a are appropriately spaced at positions along the side b of the other through hole 11b. Small hole 12b
Is provided, and between the two through holes 11a and 11b,
5 commonly used for these two through holes 11a and 11b
Small holes 12c for individual nails are appropriately arranged and drilled, and braces 1
One through hole 11a or 11b depending on the direction of 3
And the braces 13 are tightened with the bolts 14 and the nails 15 through the six small holes 12a and 12c or 12b and 12c. For example, for the braces 13L having the orientation shown in FIG. 8, one through hole 11a and three small holes 12a on the side a side are provided.
And 3 small holes 1 selected from 5 in the middle
Tighten using 2c. Further, for the braces 13R oriented as shown in FIG. 9, one small through hole 11b, three small holes 12b on the side of the side b, and three small holes selected from the middle five holes. Tighten using holes 12c.

Two through holes 11a and 11b for bolts provided in the triangular plate portion 2 and a plurality of small holes 12a and 1 for nails.
2b and 12c are for the braces 13 in which the length of the wall is 3, 4.5, and 6 and also for these braces 13
1 through hole 11a or 11b and 6 small holes 12a, 12b, 12c according to the orientation of
It is preferable to arrange 3 so that they can be tightened. However, it goes without saying that the positional relationship between these two through holes 11a and 11b and the large number of small holes 12a, 12b and 12c is not limited to this. The bolt 1
4 uses the bolt with the symbol M12, and the nail 15 has the symbol N5
Preference is given to using 0 nails.

As shown in FIG. 6, the reinforcing metal member 1 of the present invention was attached to two places above and below an opening of a building, and a strength test for compensating for the lack of braces was conducted. In this case, the displacement of the interlayer displacement angle limit value of 1/120 (24.17 mm) was a horizontal force of 112.9 kg. Therefore, the horizontal force of 118 kg, which is the horizontal force borne by the bearing wall with the standard wall magnification of 1, cannot be reached,
The wall magnification of the reinforcing metal member 1 of the present invention is 0.5. But,
It was proved that the strength in pulling out is effective for pulling out, although floating occurs due to displacement in the leg leg joint even if a horizontal force of 300 kg is applied.

As shown in FIG. 7, the reinforcing metal member 1 according to the present invention was attached to four positions on the upper, lower, left and right sides of the opening of a building, and a strength test for compensating for the lack of braces was conducted. In this case, the displacement of the interlayer displacement angle limit value of 1/120 (24.17 mm) has a horizontal force of 141.8 kg. Therefore, the wall magnification of the reinforcing metal member 1 of the present invention is 1 (the reference wall magnification). Horizontal force is 118
kg) can be obtained. The strength of pulling out is
A horizontal force of 500 kg was applied, but no withdrawal occurred at the joints in the upper and lower parts of the horizontal frame.

The strength of the reinforcing metal article 1 of the present invention against pulling out of the column in the joint portion was sufficiently proved by the above strength test results. Therefore, the reinforcing metal piece 1 of the present invention is as shown in FIG. , A striking beam portion provided at positions of the horizontal members 18 and 19, and as shown in FIG. 4, a horizontal member 20.
And the vertical member 21, that is, the column and the base, the column and the body difference, and the column and the inner corner of the girder, the triangular plate portion 2 acts as a compression member by the compressive force applied to the joint portion. By hardening the parts, the bending force generated in each part is resisted and the side part 3,
The rubber plate 6 provided in 4 acts as a buffer to loosen the impact applied to the contact surface with the wood part, and it is possible to protect the building from an earthquake by providing a vibration isolation effect that reduces the penetration into the wood part and becomes tenacious. .

Next, the reinforcing metal fitting 1 of the present invention has a wall length of 3
When fastened to the braces to be inserted in the scale, especially according to the strength test in which the tension braces 13 are provided, when the 90 × 30 braces (divided braces) are provided, the wall length The standard wall magnification of the braces that can be put into the 3 gauge is 1.5
The horizontal force that the brace bears is 177, and the tensile force generated in the brace is 545 kg. Also, 90 × 4
When 5 braces (divided braces) are installed, the standard wall magnification of the braces that can be inserted into the shaku is 2 and the horizontal force that the braces bear is 237 kg. The resulting tensile force is 725 kg. Therefore, in the case where four reinforcing metal pieces 1 of the present invention are used and fastened to a bracing, since the wall magnification of the reinforcing metal piece 1 of the present invention is 1.0,
If this is included, the wall magnification of the quadrant is 1.5+
1.0 = 2.5, the wall magnification of the bisector is 2 + 1.
Since 0 = 3.0, it is possible to sufficiently enhance the reinforcing effect of fastening the reinforcing metal fitting 1 in a bracing manner. Reinforcing metal fitting 1
By fastening the braces to the existing braces, it is possible to guarantee the effect that the braces that did not function as a tensile member can serve as the original tensile braces.

Regarding the proof stress of the building at the time of earthquake,
Although it depends on the magnitude of energy (gal) at the time of earthquake, this is not always the seismic intensity 0.2 (200 gal) under the Building Standards Act. Therefore, when the reinforcement work of the existing building is performed using the reinforcement 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 as well as the problem of what the assumed seismic intensity is. Then, based on the examination result, the reinforcing metal member 1 is attached and reinforced in place. By increasing the number of installation locations of the reinforcing hardware 1 of the present invention, the force exerted on the building by the seismic power can be made uniform. In other words, the reinforcing metal 1 of the present invention is reinforced by examining the reinforcing location and the number of reinforcements, and the entire building can be converted into a solid structure having a higher rigidity.

As shown in FIG. 10, the reinforcing metal fitting 1 of the present invention uses round steel 22 instead of the braces 13 and one through hole 11a or 11b provided in the triangular plate portion 2. The end portion 23 of the round steel 22 can be stretched with the bolt 14.

[0025]

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned structure, the reinforcing metal article of the present invention is provided as a material that resists compressive force and tensile force by being integrated with the joint metal article, and is provided by seismic force and wind pressure. When horizontal force is applied to a building, it is attached and reinforced to the loosened bolt joints due to the aging of the frame. In addition, by providing it at the upper and lower joints of the opening without brace, it has bending resistance, and the part where the brace is insufficient, the part where the brace is difficult to attach, and the material of the brace are pulled thin. It is installed in a weak area and the joint is hardened and reinforced. Bending resistance is applied to the joint where the reinforcing metal fitting of the present invention is attached, the striking beam is reinforced on the horizontal construction surface of the existing building, and on the vertical construction surface, the braces are supplemented to disproportionate the arrangement of the bearing walls. After correction, it can be converted into a solid structure and prevent plastic destruction of existing wooden structures. Further, by fastening the reinforcing metal fitting of the present invention to the braces, it is possible to perform strong structural reinforcement by integrating with the braces, and it is also possible to use round steel instead of the braces, Moreover, the reinforcing metal fitting of the present invention is provided as a reinforcing material for an existing building, and in the reinforcing work, since it can be constructed from the inside of the building without building scaffolding or peeling the outer wall, it can be installed. Easy and convenient, the reinforcement cost is low, and moreover,
It also has the advantage that it can be partially reinforced and that the seismic strength required for existing buildings can be reliably secured.

[Brief description of drawings]

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

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

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

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

FIG. 5 is a perspective view showing a usage state in which the reinforcing metal member of the present invention is fastened to the braces.

FIG. 6 is a schematic view when the reinforcing metal member of the present invention is attached to two entry corners.

FIG. 7 is a schematic view when the reinforcing metal member of the present invention is attached to the four corners.

FIG. 8 is a front view of a main portion of the reinforcing metal member of the present invention, which is fastened to a left slanted brace.

FIG. 9 is a front view of a main portion of the reinforcing metal member of the present invention, which is fastened to a right slanted braces.

FIG. 10 is a front view showing a round metal installed on the reinforcing metal member of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforcing hardware 2 Triangular plate part 3,4 Side plate part 5 Corner part 6 Rubber plate 7 Through hole 8 Small hole 9 Lag bolt 10 Screw nail 11a, 11b Through hole 12a, 12b, 12c Nail hole 13 Bracket 14 Bolt 15 Nail

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location E04B 2/56 652 E04B 1/40 B

Claims (2)

[Claims] 1. An isosceles triangular triangular plate portion which is made of an iron plate and has a right angle at one corner, and 2 which sandwiches the right angle of the triangular plate portion.
It has a side plate portion which is bent from each side and whose corners are integrally connected by welding, and a rubber plate is formed by installing a rubber plate on the outer surface of the side plate portion, and each side plate portion is attached to a corner of a building. A plurality of through holes for bolts and a plurality of small holes for screw nails are formed, and one through hole for bolts for fastening the braces and a large number of small holes for nails are formed in the triangular plate portion. A seismic reinforced metal fitting for a building characterized by being drilled. 2. An isosceles triangular triangular plate portion which is made of an iron plate and has a right angle at one corner, and the right angle of the triangular plate portion is sandwiched between 2
It has a side plate portion which is bent from each side and whose corners are integrally connected by welding, and a rubber plate is formed by installing a rubber plate on the outer surface of the side plate portion, and each side plate portion is attached to a corner of a building. A plurality of through holes for bolts and a plurality of small holes for screw nails are bored, and two through holes for bolts for fastening the braces are formed in the triangular plate portion at predetermined intervals near the side c. A plurality of small holes for nails are formed at predetermined positions at positions along the side a of the one through hole, and a plurality of holes are formed at positions along the side b of the other through hole. A seismic reinforced metal fitting for a building, characterized in that a small hole for a nail is formed, and a plurality of small holes for a nail are formed between the two through holes.