JPH1122026A - Method of fixing wooden material to concrete frame and its wooden concrete structure - Google Patents

Abstract

(57) [Summary] [Method] A method of fixing wooden material 3 to concrete frame 4 and fixing it to concrete frame 4 via cement material-containing concrete material layer 5 and exterior member 6 made of steel pipe, and its method In the structure, the wooden material 3 is mounted inside the exterior member 6, and a concrete material layer 5 containing cement is interposed between the wooden material 3 and the exterior member 6,
A structure comprising a combination of a wood material and a concrete material in which a fixed end, a concrete material layer 5 containing cement, and an exterior member 6 are embedded in a concrete frame 4. [Effect] Even if bolts and hardware are not used as in the conventional example, it is possible to make a fixed end with little backlash in structural mechanics, there is no need for construction work, and it is affected by the position of the bolt etc. Also, it is not necessary to use a large number of bolts, and it is possible to form a fixed end with little play in structural mechanics between the wooden material and the concrete frame without making the cross section of the wooden material unnecessarily large.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for fixing a wooden material to a concrete structure and a wooden concrete structure thereof, and more particularly, to fixing an end of a wooden material such as a pillar or a beam to a concrete structure. In addition, the present invention relates to a technique of fixing a concrete material layer containing cement and an exterior member to obtain a fixed end in structural mechanics.

[0002]

2. Description of the Related Art In a wooden structure using a wooden material for a main frame such as a column, a beam, a wall, etc., generally, a wooden structure is formed on a concrete foundation.
The base is set up, and pillars and the like are built on it, forming a wooden structure.

On the other hand, from the viewpoint of making a so-called fixed end in structural mechanics, as shown in FIGS. 8 (A) and 8 (B), it is attempted to fix a wooden material 3 by using a hardware 1 or a bolt 2 or the like. A method of fixing an end portion (hereinafter, referred to as a fixed end) to a concrete frame 4 such as a concrete foundation can be considered. FIG. 8B is a diagram of FIG. 8A viewed from the side. However, with this fixing method, it is impossible to make a fixed end with little backlash in structural mechanics due to the looseness of the hole of the bolt 2 and the effect of the gap generated between the hardware 1 and the wooden material 3.
Therefore, there is a problem that the magnitude of the force acting on the bolt 2 is also affected by the play of each bolt, and furthermore, the direction of the force and the relation between the acting force and the relative displacement greatly change depending on the position of the bolt 2. In the fixed end structure,
When the fixed part of the wooden material 3 bears a large load,
Many bolts 2 are required. For this reason, there is also an economic disadvantage such as enlarging the cross section of the wooden material 3 and taking much time for construction.

[0004] Further, in order to form a fixed end with less play at the joint between the wooden material and the concrete skeleton, a method of burying the fixed end of the wooden material 3 directly in the concrete skeleton 4 as shown in FIG. However, when the wooden material 3 is directly embedded in the concrete skeleton 4, the wooden material 3 absorbs an alkali component in the ready-mixed concrete used to construct the concrete skeleton 4, and deteriorates, or expands due to moisture. However, after the concrete hardens, there is a problem that the concrete shrinks due to drying and shrinkage, and a gap is formed between the concrete skeleton 4 and the wooden material 3, and the fixing is incomplete. Further, after the concrete is hardened, there is a possibility that the wood material 3 may continuously absorb water that enters through the concrete foundation.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a technique capable of solving such a technical problem. The above and other objects and novel features of the present invention will become apparent from the description of the present specification.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a method for fixing a wooden material to a concrete frame, wherein the wooden material is fixed in a concrete frame via a concrete material layer containing cement and an exterior member. Things. Further, the present invention is a wooden concrete structure in which a portion to be fixed by a wooden material is fixed in a concrete skeleton, wherein a wooden material is mounted inside an exterior member, and the wooden material and the exterior member A concrete material layer containing cement is interposed therebetween, and a portion to be fixed with a wooden material, a concrete material layer containing cement and an exterior member are buried in a concrete skeleton. It is related.

Next, the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1A shows an example of the principle of the method of the present invention. As shown in FIG. 1 (A), an end (fixed end) of the wooden material 3 to be fixed is planted inside an exterior member 6 having one end opened and having a bottom. A concrete material (layer) 5 containing cement is filled between the wood material 3 and the exterior member 6. Wood 3
Is fixed by the concrete material layer 5 containing the cement inside the exterior member 6, and the fixed end of the wood material 3, the concrete material layer 5 containing the cement formed around it, and the concrete material layer Since the exterior member 6 outside the layer 5 is buried in the concrete frame 4, the fixed end of the wooden material 3 is formed around the concrete material layer 5 including the cement formed around the wooden material 3 and the exterior of the concrete material layer 5 including the cement. Concrete frame 4 through member 6
It is firmly fixed inside.

According to the above-described embodiment, a fixed end with little backlash in structural mechanics can be formed without using bolts 2 and metal fittings 1 as in the conventional example, and the construction time is reduced. , Many bolts 2
Also, a fixed end with little backlash in structural mechanics can be formed between the wooden material 3 and the concrete frame 4 without making the cross section of the wooden material 3 unnecessarily large. In addition, compared with the method in which the fixed end of the wooden material 3 is directly buried in the concrete frame 4, the wooden material 3 only absorbs the alkali component from only the concrete material layer 5 containing cement inside the exterior member 6, The gap between the concrete skeleton 4 and the wooden material 3 in the drying shrinkage after the concrete is hardened is also affected only by the concrete material layer 5 containing the cement, and the exterior member 6 causes the water from the concrete skeleton 4 to the wooden material 3 to flow. Can be prevented, and the absorption of moisture can be stopped only from the concrete material layer 5 containing cement inside the exterior member 6. In this case, a resin such as an epoxy resin can be filled.However, in the case of using the resin, the concrete material including cement is susceptible to heat during construction, whereas the concrete material including cement is susceptible to heat during construction. There is an advantage that it has less heat resistance and can reduce damage at the time of fire.

Another example of the present invention will be described with reference to FIG. In this embodiment, a bellows-like pipe used for an air conditioning duct is used as the exterior member 6, and
The sheer connector 7 is protruded from the wooden material 3 so that the wooden material 3 can mainly resist the upward pulling force. That is, the ribs of the bellows-shaped pipe 6 are engaged with the concrete frame 4, and the wooden material 3 is engaged with the concrete material layer 5 containing cement via the shear connector 7, so that the wooden material 3 is further moved upward. To withstand the pulling force. In this case, the axial tensile force generated in the wooden material 3 is transmitted to the cement-containing concrete material layer 5 via the shear connector 7,
Further, the power is transmitted to the concrete skeleton 4 via the ribs of the bellows-shaped pipe 6. In the above, a bellows-shaped pipe 6 is further erected on the plate 8 so that the lower end of the wooden material 3 is fixed to the plate 8 so that the wooden material 3 and the concrete frame are further increased. 4 to make it possible to make a fixed end with little backlash in structural mechanics.

FIG. 2 is a view showing an embodiment to which the present invention is applied. An example in which a pillar 3 as a wooden material is erected on a cloth foundation 4 as a concrete body under the construction example shown in FIG. Is shown. As in the construction example shown in FIG. 1A, as shown in FIG. 2, the fixed end of the pillar 3 is planted inside the exterior member 6 having one end opened and a bottom. A cement material-containing concrete material layer 5 is filled between the wood material 3 and the exterior member 6, and the fixed end of the pillar 3, the cement material concrete material layer 5 formed around the fixed end, and the concrete material material The exterior member 6 outside the layer 5 is embedded in the fabric foundation 4.

FIG. 3 shows another embodiment of the present invention, in which a beam 3 is erected on a concrete pillar 4 under the construction example shown in FIG. A fixed end of the beam 3 is mounted inside an exterior member 6 having one end opened and having a bottom, and a concrete material containing cement is provided between the wooden member 3 and the exterior member 6. Fill layer 5,
The fixed end of the beam 3, the concrete material layer 5 containing cement formed around the beam 3 and the exterior member 6 outside the fixed end are embedded in the concrete column 4, and the fixed end of the beam 3 is fixed to the concrete column 4. I do. Although not shown,
Instead of the concrete pillar 4, a concrete wall may be used, a plurality of beams may be provided on the wall, and a veranda may be formed on the beam.

FIG. 4 is a view showing still another embodiment to which the present invention is applied. In a garage 9 used for a garage of an automobile, a pillar 3 is provided on a concrete foundation 4, a concrete material layer 5 containing cement and an exterior member. 6 shows an example of standing upright. In this case, in the conventional example, since the column base and the connection between the column and the beam become a pin, it is necessary to provide a bracing or a load-bearing wall between the columns 3 and the column 3 or some kind of reinforcement is required. However, these are unnecessary in the present invention.

FIG. 5 is a view showing still another embodiment to which the present invention is applied.
An example is shown in which a concrete material layer 5 containing cement is formed between the beam 3 and the exterior member 6, a halfway portion of the beam 3 is buried in a concrete frame 4, and the beam 3 is erected.

Examples of the wood material used in the present invention include wood structural materials such as columns and beams, and the wood material is used in the form of lumber, laminated wood, laminated veneer lumber, or other processed wood material. It is possible to use those which have been subjected to preservation, waterproofing, fire protection and the like as required. In particular, in consideration of waterproofness, it is effective to cover the wooden material with a waterproof resin film or to perform a waterproof treatment with a waterproof agent. As described above, it is also effective to provide a protrusion such as a protrusion of the shear connector 7 on the wooden material 3.

A typical example of the exterior member used in the present invention is a steel pipe, but it may be made of a material such as plastic, porcelain, glass, or the like. From the usage application, those made of a hard material having good watertightness are preferable. Also, as described above, it is preferable to use an exterior member having irregularities or the like as appropriate, because the withstand force of the fixed end of the wooden material is improved.

The concrete material containing cement used in the present invention includes concrete material consisting of cement, fine aggregate and coarse aggregate, mortar not using coarse aggregate,
There is a cement paste that does not use any aggregate. A concrete material comprising cement, fine aggregate and coarse aggregate is formed by mixing cement, fine aggregate, coarse aggregate and water. Examples of the aggregate include sand, crushed sand, gravel, crushed stone, and the like. The aggregate generally has a concrete volume of 60-8.
Occupies 0%. For concrete materials, including cement,
In order to minimize the absorption of water into the wood, the amount of surplus water generated during the hardening is small, and in order to minimize the play of the wood, the degree of shrinkage is as small as possible. preferable. If necessary, the concrete material may include an AE (entrainedair) agent, a water reducing agent,
Various admixtures such as an accelerator (hydration reaction accelerator) can be added.

The concrete material containing cement used in the present invention may contain a resin such as an epoxy resin, a urethane resin or an acrylic resin. It is preferred to use a resin that is adhesive to both wood and concrete materials, including cement. As the resin, a wood adhesive containing a resin as a main component and various additives such as a filler and a plasticizer can be used. The resin is used, for example, in a liquid form.

Examples of the concrete skeleton applied in the present invention include a concrete cloth foundation and the like. For example, a concrete skeleton obtained by kneading and mixing cement, water, fine aggregate, coarse aggregate and, if necessary, an admixture material is used. Is mentioned.

According to the method of the present invention, for example, the fixed end of the wooden material 3 is placed inside a steel pipe 6, a concrete material layer 5 containing cement is filled, and this is embedded in the concrete 4 before hardening. Alternatively, a steel pipe 6 is installed in the concrete body 4 before hardening, the fixed end of the wooden material 3 is put inside the steel pipe 6, and a concrete material containing cement is poured into a gap between the wooden material 3 and the steel pipe 6. And various specifications such as forming a concrete material layer 5 containing cement.

[0020]

[Test example]

(1) As shown in FIG. 6, the cross section is 38 mm × 88 m
m, a square steel pipe (50 × 100 mm, thickness 3.2 mm) 6 is set at the center of the beam specimen 3 having a length of 352 mm,
The gap between the beam and the square steel pipe was filled with a concrete material 5 containing cement, a load was applied via a pressure plate 10, and a penetration test was performed. FIG. 7A shows the test results. On the other hand, an epoxy resin was filled in place of the concrete material containing cement, and a penetration test was performed in the same manner. FIG. 7B shows the test results. These test results show that the two have almost the same load-relative displacement. (2) In connection with the construction example of the present invention, a square steel pipe (100X
100 mm, thickness 3.2 mm) and its cross section is 65.5.
The length of swallowing a beam made of Batesga material having a size of mm × 65.5 mm and a length of 1000 mm into the rectangular steel pipe is set to 20.
0 mm, and the filling thickness of the epoxy resin layer is 14.
It was set to 05 mm, embedded and coalesced, and embedded in foundation concrete. Concentrated load is applied to the cantilever at a point 650 mm away from the upper beam of the foundation, and JIS Z
When a bending test was performed in accordance with the 2113 bending test method, the fixing was performed well, there was little backlash, and the fixing state was stable up to 2/3 of the bending strength (flawless material) of Batesga material. . As shown in the above (1), the load-relative displacement in the burling test shows the same result in the case of the epoxy resin and the concrete material containing the cement. It can be inferred that fixing is performed well and a stable fixing state is obtained.

[0021]

As described above, according to the present invention,
Even without using bolts or hardware as in the conventional example, it is possible to make a fixed end with little backlash in structural mechanics, it does not require construction work, it is not affected by the position of the bolt, etc. Without the need for bolts, and without making the cross section of the wooden material unnecessarily large, between the wooden material and the concrete skeleton,
A fixed end with little backlash in structural mechanics can be made. In addition, compared to the method of burying the fixed end of the wooden material directly in the concrete body, the wooden material only absorbs the alkali component from the concrete material layer including the cement inside the exterior member, and is dried after the concrete hardens. The gap between the concrete frame and the wooden material during shrinkage is also affected only by the concrete material layer containing the cement, and
The exterior member prevents water from entering the wooden material from the concrete skeleton, and furthermore, the absorption of moisture can be stopped only from the concrete material layer containing cement inside the exterior member. In this case, resin can be filled,
In the case of using the resin, concrete materials including cement are susceptible to heat generation during construction and damage during fire.
There is an advantage that heat generation at the time of construction is small, heat resistance is obtained, and damage at the time of fire can be reduced. In a case such as a garage used in a garage of an automobile, if columns are erected on a concrete foundation via a concrete material layer containing cement and an exterior member, in the conventional example, column bases and columns and beams are provided. Since the mouth becomes a pin, a strut or a load-bearing wall had to be provided between the columns, or some kind of reinforcement was required. However, in the present invention, these can be made unnecessary.

[Brief description of the drawings]

FIG. 1 (A) is a diagram illustrating the principle of an example of the method of the present invention, and FIG.
Is a principle diagram of another example of the method of the present invention.

FIG. 2 is an embodiment diagram to which the present invention is applied.

FIG. 3 is a diagram showing another embodiment to which the present invention is applied.

FIG. 4 is a diagram showing still another embodiment to which the present invention is applied.

FIG. 5 is a diagram of still another embodiment to which the present invention is applied.

FIG. 6 is an explanatory diagram showing a test method.

FIGS. 7A and 7B are graphs showing test results, respectively.

8 (A), (B) and (C) are comparative example construction drawings, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hardware 2 Bolt 3 Wood material 4 Concrete frame 5 Concrete material layer containing cement 6 Exterior member (steel pipe) 7 Shear connector 8 Plate 9 Garage 10 Pressing plate

Continued on the front page. (72) Inventor, Noboru Tezuka 1-1-19-1804, Sumiyoshi, Koto-ku, Tokyo (72) Inventor, Shinnori Yamada 3-7, Fujijidai, Sakura, Chiba Prefecture (72) Inventor, Sadakazu Yoda, Yokohama 1-13-6, Midori-ku, Minamigaoka 5-132 Tama-Plaza Complex 5-302 (72) Inventor Ken Tsuji 4-13-1, Itabashi, Itabashi-ku, Tokyo Inside Oka Promotional Company (72) Inventor Tadashi Nerikugawa Tokyo 4-13-1 Itabashi, Itabashi-ku Oka Promotion Co., Ltd. (72) Inventor Katsutoshi Ogawa 2-127-6, Nakamura-cho, Minami-ku, Yokohama-shi (72) Inventor Takashi Shimada 2024 Shigusa, Maritime-cho, Maritime-gun, Chiba Prefecture

Claims (5)

[Claims] 1. A method for fixing a wooden material to a concrete skeleton, comprising fixing the wooden material to a concrete skeleton via a concrete material layer containing cement and an exterior member. 2. The method according to claim 1, wherein an end of the wooden material to be fixed is fixed in the concrete skeleton. 3. The method according to claim 1, wherein the wooden material is a pillar or a beam. 4. The method according to claim 1, wherein the armor member is a steel pipe. 5. A wooden concrete structure in which a portion to be fixed with a wooden material is fixed in a concrete frame, wherein a wooden material is mounted inside an exterior member, and the wooden material and the exterior member are connected to each other. A wooden concrete structure comprising a cement material-containing concrete material layer interposed therebetween, and a portion of the wooden material to be fixed, a cement material-containing concrete material layer, and an exterior member embedded in a concrete skeleton.