JP3457526B2 - Seismic reinforcement structure and method of wooden building - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic retrofit structure for a wooden building which reinforces a joint between a base and a pillar, a vertical member such as a pillar and a beam, and a horizontal member such as a beam and a girder in a wooden building. And a reinforcement method.

[0002]

2. Description of the Related Art In recent years, the collapse of wooden structures due to a large earthquake has become a problem. As the cause of this collapse, for example,
It has been proved that it occurs because the tenon is removed by the vibration of the earthquake at the part where the base and the pillar, the pillar and the beam, the beam and the small beam, etc. are joined through the tenon. For this reason, recently, when building a new wooden building,
BACKGROUND ART Joining points of members such as beams are reinforced by connecting steel members such as bolts and nuts from inside and outside with various metal fittings for construction.

[0003]

However, in the case of reinforcing the joint portion of an existing wooden building, in the above-mentioned reinforcing structure, the interior and the exterior must be removed to expose both sides of the joint portion. It has been extremely difficult to retrofit existing wooden buildings with the above-mentioned reinforcing structure. Here, it may be possible to facilitate the attachment of the reinforcing metal fittings by attaching the reinforcing metal fittings to the joints from the outside with screws, but in this case,
Compared to the structure in which bolts and nuts are fixed from both inside and outside, there are problems that the reinforcement strength is reduced and the reliability of reinforcement cannot be obtained. In addition, in the case of the reinforcing structure using the reinforcing metal fittings as described above, dew condensation occurs on the reinforcing metal fittings, and the condensed water causes corrosion such as rust, so that there is a problem in durability. Moreover, there is a risk that the foundation, pillars, beams, and the like will rot or attract termites due to the condensed water generated by the reinforcing metal fittings. Further, when the joints are rigidly fixed by the reinforcing metal fittings, there is a problem that the shock during an earthquake is not dispersed and is applied to the constituent members.

The present invention has been made in view of the above circumstances, and it can be applied to an existing wooden building very easily, and is excellent in durability, which may impair the wooden structure material. It is an object of the present invention to provide a highly reliable seismic retrofit structure and method for a wooden building.

[0005]

In order to achieve the above object, the seismic resistant structure for a wooden building according to claim 1 is joined to each other and a joint portion between the wooden structural members constituting the frame of the wooden building is joined. It is a structure for earthquake-proof reinforcement of wooden structures that is applied to each of the wooden structure materials, and through holes that are substantially parallel to each other are formed in the vicinity of the joints in each of the wooden structure materials. A rope is inserted, and both ends of the tightly bound rope are joined together by a rope joining tool to form an annular shape. The tightly bound rope is tightly bound near the joints. In other words, a loop-shaped tie rope is inserted into the through-holes formed in the wooden structure materials that are joined to each other, and the tie rope is connected by a rope connecting tool to tie the vicinity of the joint portion of the wooden structure material. Therefore, it is possible to reliably reinforce the joints of the wooden structure members to each other, and to prevent the inconvenience that the joints of the wooden structure members are disengaged by the tensile force even when vibration due to an earthquake is applied. Also, because the structure is not rigidly fixed by hardware etc. but tightly tied with a tight-tie rope, the tight-tie rope stretches and deforms in cooperation with the deformation of the wooden structure material, absorbs sudden shocks and disperses tensile stress. Is possible.

According to a second aspect of the present invention, there is provided an earthquake-proof reinforcing structure for a wooden structure according to the first aspect, wherein the binding rope and the rope connecting member are made of synthetic resin. There is. That is, since the member that reinforces the joint portion is formed of synthetic resin, it is lightweight and not bulky, and the handling is facilitated. As a result, good workability is obtained and transporting and carrying-in is facilitated. Moreover, since it is a non-metallic material made of synthetic resin,
Condensation does not occur on these reinforcing members,
It is possible to obtain an earthquake-proof reinforcing structure that is extremely durable and does not corrode these members due to rust or the like. In addition, since dew condensation does not occur, it is possible to avoid detrimental effects such as decay of wood structural materials and attraction of termites. If the exterior is a fireproof structure with siding or lath mortar coating finish, the reinforcing structure retains heat resistance equivalent to the heat resistance of the wooden frame at 260 ° C or higher.

Further, it is desirable that a reinforcing pipe made of synthetic resin, into which the binding rope is inserted, is inserted into the through hole.
Good As a result, the work of inserting the binding rope into the through hole is facilitated, and the reinforcing pipe prevents the inconvenience that the wooden structure material is locally distorted by the binding rope.

[0008] Further , the rope connecting device includes a locking member for locking the ends of the binding rope, and an expansion / contraction member for adjusting the binding force of the binding rope by moving the locking members close to and away from each other. It is desirable to have In other words, by rotating the telescopic member of the rope connector,
Very easily, the tied ropes are tied together by prestressing the wooden structure materials, and the binding force is easily adjusted.

According to a sixth aspect of the present invention, there is provided a method for earthquake-proofing a wooden building, wherein the timber structure materials are joined together to reinforce the joints between the wooden structural members constituting the frame of the wooden building. Vertically or horizontally, through holes that are substantially parallel to each other are formed in the vicinity of the joints of each wooden structure material, and a loop-shaped binding rope is inserted into these through holes, and both ends of the ropes are connected to each other. It is characterized in that they are connected to each other and the vicinity of the joint portion of the wooden structure material is tightly connected. In other words, by forming through holes parallel to each other in the wooden structure materials that are joined to each other from one direction side, inserting the binding rope, and connecting both ends of this binding rope with the rope connecting tool, existing wooden construction Even in a building, it is very easy to reinforce the joints by tightly connecting the wooden structure members in the vicinity of the joints.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a seismic resistant reinforcing structure for a wooden building and a reinforcing method according to the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a base, and reference numeral 2 is a pillar such as a corner-through pillar that is joined to the base 1 and is erected upright, both of which are wooden structure materials that form the skeleton of a wooden building. Base 1
Are fixed to the upper part of the cloth foundation 3. The pillar 2 has a tenon (not shown) formed at the end thereof, and by fitting the tenon into a tenon hole (not shown) formed in the base 1, the pillar 2 is joined to the base 1 in an upright state. Has been done. Then, a seismic reinforcement structure is provided at a joint portion which is a frame portion of the base 1 and the pillar 2. Next, the seismic reinforcement structure will be described.

The base 1 is formed with a through hole 4 which is opened at the outer side surface sandwiching the corner portion 1a formed by the end of the base at the contact portion with the cloth foundation 3, and the through hole 4 is shown in FIG. The reinforcing pipe 5 as shown in FIG. In addition, a through hole 6 is formed in the diagonal direction in the vicinity of the lower end of the pillar 2 so as to be substantially parallel to the through hole 4 formed in the base 1, and this through hole 6 also has the reinforcing pipe. 5 is inserted.
Specifically, the through hole 4 is formed at a size position from the corner 1a to about twice the thickness of the base 1, and the through hole 6
Are formed at a height of about 400 mm from the upper surface of the base 1. The through holes 4 and 6 are appropriately changed depending on the thickness of the base 1 and the pillar 2, the joining state (damage), work convenience, and the like.

The through holes 4 and 6 each have a diameter of about 2
The reinforcing pipe 5 which is about 8 mm and is inserted into the through holes 4 and 6 is made of, for example, fiber reinforced resin (FRP).
What is formed from etc. is used. The reinforcing pipe 5 has an outer diameter of about 26 mm and an inner diameter of about 16 mm.

Then, as described above, the binding rope 7 provided on the base 1 and the pillar 2 is inserted, and both ends of the binding rope 7 are fastened to each other by the rope linking tool 8, whereby this The binding rope 7 is the base 1 and the pillar 2.
It is tightly connected in an annular shape at the joint. The binding rope 7 is
It is endless (loop-shaped). As the binding rope 7, for example, a synthetic fiber rope having high strength (particularly tensile strength) and low elongation such as aramid fiber or wholly aromatic polyester (polyarylate) fiber and having a diameter of about 6 mm is used.

As shown in FIGS. 3 and 4, the rope connecting tool 8 for fastening both ends of the binding rope 7 is provided between the pair of locking members 11 and the locking members 11 and is engaged with each other. The elastic member 12 connects the stopper members 11 to each other. The locking member 11 has an arcuate portion 11a formed in an arcuate shape and a straight portion 11b provided integrally with the arcuate portion 11a. The arcuate portion 11a and the straight portion 11b are provided with an outer periphery thereof. Grooves 13 communicating with each other are formed, and both ends of the binding rope 7 are hooked on the groove 13 of the locking member 11. Then, in this way, the locking member 1
By hooking the binding rope 7 on the groove 13 of 1,
The end of each binding rope 7 is the rope connecting tool 8
Are connected to each other in a wrapped state.

Each straight portion 1 of the locking member 11
Female threads 16 that are opposite to each other are formed on 1b. The elastic member 12 has a hexagonal rotating portion 17 in the middle portion and male threads 18 opposite to each other at both ends thereof.
It is threadedly engaged with the female thread portion 16. That is, by rotating the elastic member 12 by the rotating portion 17,
The amount of screwing of the male screw portion 18 into the female screw portion 16 of the locking member 11 is changed, the distance between the locking members 11 is displaced, and the length dimension of the rope connecting tool 8 is expanded and contracted. Has become.

Further, one of the locking members 11 constituting the rope connecting tool 8 has one locking member 11 and the other locking member 1
A plurality of stays 14 are formed toward 1 and a plurality of sliding holes 15 into which the stay 14 is slidably inserted are formed in the other locking member 11. As a result, the locking members 11 slide on each other in the approaching / separating direction without rotating about the axis of the elastic member 12. Here, the rope connecting tool 8 having the above-mentioned configuration
Is formed of synthetic resin having excellent rigidity such as engineering plastic or fiber reinforced resin (FRP). In addition, the arc portion of the groove portion 13 of the locking member 11 that constitutes the rope connecting tool 8 has a curvature that does not break due to stress concentration due to the extreme bending of the end portion of the binding rope. It is about 40 mm. Further, the groove portion 13 of the locking member 11 has a depth dimension and a width dimension capable of sufficiently engaging the binding rope 7 having a diameter of about 6 mm, and here, the depth dimension is about 10 mm. The width is about 8 mm.

Next, a case of constructing the above-mentioned seismic reinforcement structure on an existing wooden building will be described along with the procedure. (1) First, part of the exterior of an existing wooden building is removed to expose the outside of the joint between the base 1 and the pillar 2.
(2) Next, from the outside, a through hole 6 is drilled in the pillar 2 on the diagonal line thereof by a drill or the like, and the contact portion of the base 1 with the cloth foundation is drilled in parallel with the through hole 6 of the pillar 2 by a drill or the like. Drill holes 4. (3) In this way, the base 1 and the pillar 2
After forming the through holes 4 and 6, the reinforcing pipe 5 is inserted into the through holes 4 and 6.

(4) Next, the binding rope 7 is inserted into the reinforcing pipe 5 with both ends in a loop shape. As a method of insertion, for example, both ends of the binding rope 7 are inserted into the respective reinforcing pipes 5 of the through hole 4 of the base 1 and the through hole 6 of the pillar 2 from one side and pulled out to the other side. (5) Then, both ends of the binding rope 7 pulled out to the other side are connected by the rope connecting tool 8. When connecting both ends of the rope 7 with this rope connecting tool 8,
First, the elastic member 12 of the rope connector 8 is rotated to bring the locking members 11 close to each other to reduce the overall length,
The looped ends of the binding rope 7 are hooked in the grooves 13 of the respective locking members 11 of the contracted rope connecting tool 8. In this way, with both ends of the binding rope 7 hooked on the locking member 11 of the rope connecting tool 8, the elastic member 12
Is rotated to separate the locking members 11 from each other,
Extend the whole and tighten the binding rope 7 to give prestress. By doing so, the binding rope 7 is annularly bound to the joint portion of the base 1 and the pillar 2, and the joint portion is reinforced.

As described above, by performing the above-mentioned steps (1) to (5) and restoring the removed exterior, the seismic retrofitting structure is formed at the joint between the base 1 and the pillar 2 of the existing wooden building. Can be applied.

The seismic retrofit structure has the base 1 and the pillar 2
The present invention can be applied not only to the joints between the beams and but also to all the joints such as the joints between the beams and the joints between the beams and columns. Moreover, what is shown in FIG. 5 has the above-mentioned seismic reinforcement structure at the joint between the beams (wood structural members) 21 and can be reinforced against horizontal deformation. In this earthquake-proof reinforcement structure, for example, a through hole 22 is formed in each beam 21 from the back of the ceiling, the reinforcing pipe 5 is inserted into this through hole 22, and then the binding rope 7 is inserted into each reinforcing pipe 5. It is provided by connecting both ends of the lever with the rope connecting tool 8.

According to this seismic-proof reinforcement structure and reinforcement method, construction work such as formation of the through holes 4 and 6 or the through holes 22, insertion of the reinforcing pipe 5, insertion of the binding rope 7 and the like are performed at the joint points or Since it can be performed horizontally from one side, it is possible to perform the construction in an existing wooden building without removing the interior or the like on the interior side and causing any inconvenience to residents. Also, the reinforcing pipe 5 and the binding rope 7
Since the reinforcing members including the rope connecting tool 8 and the rope connecting tool 8 are each formed of a synthetic resin, they are lightweight and not bulky, and can be easily handled. As a result, good workability can be obtained, and transportation and loading are easy. Be promoted. Moreover, since it is a non-metallic material made of synthetic resin, dew condensation does not occur on these reinforcing members, and therefore the reinforcing members are extremely durable and do not rust due to dew condensation water. Can be obtained. Also,
Since dew condensation does not occur, it is possible to avoid harmful effects such as decay of wood structure materials and attraction of termites due to dew condensation water. If the exterior is a fireproof structure with siding or lath mortar coating finish, this reinforcing structure can maintain heat resistance equivalent to the heat resistance of the wooden framework of 260 ° C or higher.

Further, since the structure is not rigidly fixed by a metal or the like but is tightly bound by the binding rope 7, the binding rope 7 absorbs the impact and disperses the stress even if the local deformation of the wooden structure material occurs. be able to. Moreover, the through hole 4,
Since the reinforcing pipes 5 made of synthetic resin are inserted through 6, 22, the work of inserting the binding rope 7 into the through holes 4, 6, 22 can be performed very easily. It is possible to prevent inconveniences such that 4, 6, 22 locally deform or buckle. Further, since the rope connecting tool 8 for connecting the tightly bound ropes 7 is arranged in the space portion formed between the base 1 and the pillar 2, the pillar 2 and the beam 21, and the corners of the beams 21, it is necessary to install the exterior. However, the rope connecting tool 8 does not become an obstacle.

In the above example, the case where the existing wooden building is reinforced has been described, but the seismic retrofit structure and the reinforcing method can be applied to a new wooden building as a matter of course. Is. Further, the length of the binding rope 7 is specified by the thickness of the base 1, the pillar 2, the beam 21, etc.,
It is advisable to prepare three or four types of binding ropes 7 with different lengths in response to changes at the site.

In general, the base 1 is fixed to the cloth base 3 by anchor bolts or the like. However, if the fixed portion is damaged or is in an insufficient state, the base 1 is fixed to the cloth base 3 portion. It is also possible to perforate a through hole parallel to the through hole 6 of the pillar 2 and pass the binding rope 7 through it, and entangle and tightly bind the cloth foundation 3 together with the base 1 and the pillar 2.

Further, the binding rope 7 does not have to be an endless loop-shaped whole, for example, a diameter of about 12 mm.
It is also possible to use a single rope in which both ends of a synthetic fiber rope of a certain degree are formed with loop portions that can be locked to the locking member 11 of the rope connecting tool 8 by ice-price processing or the like. Further, the respective dimensions shown in the above example are not limited to the above example, and can be changed appropriately.

[0026]

As described above, according to the seismic retrofit structure and method for a wooden building of the present invention, the following effects can be obtained. According to the seismic strengthening structure for a wooden structure according to claim 1, a loop-shaped binding rope is wholly inserted into a through hole formed in the wooden structural members that are joined to each other, and the binding rope is connected by a rope connector. Since the joints and the vicinity of the joints of the wooden structure materials are tightly connected, the joints of the wooden structure materials are securely reinforced, and the joints of the wooden structure materials are pulled even when vibrations due to an earthquake are applied. It is possible to reliably prevent inconveniences such as disengagement due to force. In addition, since the structure is not rigidly fixed by a metal object or the like but is tightly bound by a binding rope, when the local deformation of the wooden structure material occurs, the binding rope can absorb a sudden impact and disperse the stress. In addition, since it is possible to perform construction work such as formation of through holes, insertion of reinforcing pipes, insertion of binding ropes, etc. from one direction side vertically or horizontally at the joint part,
In an existing wooden building, it is possible to carry out construction without inconvenience to residents, without removing any interior decorations on the indoor side.

According to the seismic reinforcement structure for a wooden structure as claimed in claim 2, since the member for reinforcing the joint is made of synthetic resin, it is lightweight and not bulky and can be easily handled. As a result, good workability can be obtained,
It facilitates transportation and loading. Moreover, since it is a non-metallic material made of synthetic resin, no condensation phenomenon occurs on these reinforcing members, and therefore, the reinforcing member does not rust due to dew condensation water and is extremely durable. Can be obtained. Further, since dew condensation does not occur, it is possible to avoid harmful effects such as decay of the wooden structure material and attraction of termites due to the dew condensation water. If the exterior is a fireproof structure with a siding or lath mortar coating finish, the reinforcing structure can retain heat resistance equivalent to the heat resistance of the wooden frame at 260 ° C or higher.

According to the earthquake-proof reinforcing structure for a wooden structure of claim 3 , since the synthetic resin pipe is inserted into the through hole, the work of inserting the binding rope into the through hole can be performed very easily. Further, it is possible to prevent the inconvenience that the through hole of the wooden structure material is locally deformed or buckled by the binding rope. According to the earthquake-proof reinforcement structure for a wooden structure according to claim 4, by rotating the elastic member of the rope connector, it is possible to very easily perform the binding of the wooden structure materials with the binding rope, and Tightness or prestress can be easily adjusted.

According to the method for earthquake-proofing reinforcement of a wooden structure of the present invention , through-holes which are parallel to each other are formed vertically or horizontally from one direction side in the wooden structure materials which are joined to each other to form a loop-shaped tight connection. By simply inserting a rope and connecting both ends of this binding rope with a rope connector, it is extremely easy to connect existing wooden structures to each wooden structure material in the vicinity of the joint. Can be reinforced.

[Brief description of drawings]

FIG. 1 is a perspective view of a joint portion between wooden structural members provided with a seismic strengthening structure for explaining a seismic strengthening structure and a reinforcing method for a wooden building according to an embodiment of the present invention.

FIG. 2 is a perspective view of a reinforcing pipe showing a reinforcing pipe used in the earthquake-proof reinforcing structure for a wooden building and the reinforcing method according to the embodiment of the present invention.

FIG. 3 is a front view showing a cross-section of a part of the rope connecting tool for explaining the configuration and structure of the rope connecting tool used in the earthquake-proof reinforcing structure and the reinforcing method for the wooden building according to the embodiment of the present invention.

FIG. 4 is a side view of the rope connecting tool for explaining the structure and structure of the rope connecting tool used in the earthquake-proof reinforcing structure for a wooden building and the reinforcing method according to the embodiment of the present invention.

FIG. 5 is a perspective view of a joint portion between the wooden structural members made of beams provided with the earthquake-proof reinforcing structure of the wooden building according to the embodiment of the present invention.

[Explanation of symbols]

1 Foundation (wood structural material) 2 pillars (wood structural material) 3 cloth foundation (wood structure material) 4, 6, 22 through holes 5 Reinforcement pipe 7 tight rope 8 rope connector 11 Locking member 12 Elastic member 21 Beams (wood structural materials)

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Eiji Kotani Eiji Kotani 33-66, Fukui City, Fukui Prefecture 33 Fukubi Chemical Industry Co., Ltd. (72) Inventor Nobuichi Takagi Thirty-eight companies in Fukui City, Fukui Prefecture 33, 66, Fukubi Chemical Industry Co., Ltd. (56) Reference JP-A-11-107383 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E04B 1/26 E04B 1 / 38

Claims (6)

(57) [Claims] 1. A seismic retrofit structure for a wooden structure, which is applied to a joint between wooden structural members that are jointed to each other to form a frame of the wooden structure, wherein each of the wooden structural members has a joint. In the vicinity, through holes that are substantially parallel to each other are formed, and a loop-shaped binding rope is inserted through the through holes, and the binding rope has both ends connected by rope connecting tools to form an annular shape. The seismic reinforcing structure for a wooden building, wherein the vicinity of the joint is tightly bound by the binding rope. 2. The seismic retrofit structure for a wooden building according to claim 1, wherein the binding rope and the rope connecting tool are made of synthetic resin. 3. The seismic retrofit structure for a wooden building according to claim 1, wherein a reinforcing pipe made of synthetic resin into which the binding rope is inserted is inserted into the through hole. . 4. The rope connecting device comprises a locking member for locking the ends of the binding rope, and a telescopic member for adjusting the binding force of the binding rope by moving the locking members close to and away from each other. The seismic-proof reinforcement structure of the wooden structure of any one of Claims 1-3 characterized by having. 5. The whole rope-shaped binding rope is
Tying rope with loops formed at both ends of a book rope
The wooden structure according to claim 3 or 4, characterized in that
Seismic reinforcement structure for buildings. 6. A seismic retrofitting method for a wooden building, which is for joining a joint between wooden structural materials that are joined to each other to form a frame of the wooden building, and wherein a method for From the directional side, through holes that are substantially parallel to each other are formed, and the binding ropes that are loop-shaped as a whole are inserted into these through holes, and both ends thereof are connected to each other, and the vicinity of the joint portion of the wooden structure material is tightly connected. A method for earthquake-proofing a wooden structure, which is characterized in that