JPH1034612A - Composite beam assembly material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite beam assembly material which is free from any trouble encountered in nailing operation and adequately displays its improved effects of bending performance with a steel material or steel sheet. SOLUTION: In a composite beam assembly material for a residential building obtained by embedding and bonding a steel bar 11 (or a steel sheet) into an interstice between the layers of a wooden lamina 10, the steel material 11 (steel sheet) is combined with the inner sides of the lamina 10 positioned at the top and the bottom in the thickness direction. In addition, the lamina 10 used as an outer layer A which is 1/8 the thickness of the beam material from its upper and lower face, is set to 85×10<3> kgf/cm<2> or more in terms of Young's modulus in flexture. Further, the Young's modulus in flexture of the lamina 10 used as an intermediate layer B which is 1/8 the thickness of the inner beam material from the outer layer A is set to 75×10<3> kfg/cm<2> or more and that of the lamina 10 used as an inner layer C which is 1/2 the thickness of the inner beam material from the intermediate layer B is 65×10<3> kfg/cm<2> or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite laminated beam in which a steel material or a steel plate is compositely bonded between laminating laminated materials.
More specifically, the present invention relates to a composite laminated beam material that does not hinder the processing of nailing or the like and that can sufficiently exhibit the effect of improving the bending performance of a steel plate or a steel material.

[0002]

2. Description of the Related Art Various types of laminated wood for laminated construction have been proposed in general buildings. The laminated wood has a cross-sectional area as small as possible. There is a strong demand for improving its bending rigidity. For the purpose of increasing the section bending stiffness from such a request, the present inventor, as shown in JP-A-6-299654, insert a long steel material between composite beam materials laminated with a plurality of lamina, We invented a composite beam material that does not hinder processing such as nailing, has a beautiful appearance, and is excellent in durability.

[0003] By the way, as a laminated material currently used for beams of a wooden framed house, there is a large-sized laminated structural lumber for structural use.
AS bay pine first class laminated wood is often used, and when a laminated wood such as cedar having lower rigidity is used, it is necessary to increase the cross section. Therefore, an object of the present invention is to combine a steel material or a steel plate with a low-strength material such as cedar, so that processing such as nailing is not hindered, and the bending performance improvement effect of the steel plate or the steel material is exhibited. It is an object of the present invention to provide a composite laminated beam having the same performance as a first-class laminated wood.

[0004]

As a result of various studies, the present inventor has found that, as described above, in the above-described composite laminated beam in which steel is laminated together with lamina, the above-mentioned lamina constituting the composite laminated beam is provided. It has been found that by having a specific bending Young's modulus, the performance can be improved to the same level as that of the currently used bay pine laminated wood.

[0005] The present invention has been made based on the above-mentioned findings, and the invention according to claim 1 has the following features.
In a composite laminated beam for a home made by burying and bonding a bar-shaped steel material or laminating and bonding a plate-shaped steel plate, a composite of the steel material or the steel plate inside the lamina located at the top and bottom in the thickness direction is used. From the top and bottom of the beam
8 of the thickness of the bending Young's coefficient of the lamina used in the outer layer is a portion with a respective 85 × 10 ³ kgf / cm ² or more, 1/8 thickness portion of the further inner beam member from said outer layer The bending Young's modulus of the above lamina used for a certain intermediate layer
75 × 10 ³ kgf / cm ² or more, and the bending Young's modulus of the lamina used for the inner layer, which is half the thickness of the beam material further inside from the intermediate layer, is 65 × 10 ³ kgf / cm The object has been attained by providing a composite laminated beam material characterized by being ² or more.

According to a second aspect of the present invention, there is provided a composite assembly according to the first aspect, wherein a cross-sectional dimension of the beam member is 150 mm or more and 360 mm or less in thickness, and 85 mmmm or more and 105 mm or less in width. A beam material is provided.

[0007] The invention described in claim 3 is the first or second invention.
In the invention described in the above, the cross-sectional dimension of the steel material, the thickness 13
a composite laminated beam material having a width of 4.5 mm or more and 8 mm or less, wherein at least four beams are arranged at the same distance from the upper surface and the lower surface of the beam material. Things.

The invention described in claim 4 is the first or second invention.
In the invention described in the above, the cross-sectional dimension of the steel sheet, the thickness
1.6mm or more and 2.3mm or less, width 80mm or more and 105mm or less,
A composite laminated beam material is provided, wherein at least two of the beam materials are arranged at the same distance from the upper surface and the lower surface of the beam material.

According to a fifth aspect of the present invention, in the first aspect of the invention, the lamina has a thickness of 25.
It is intended to provide a composite laminated beam material having a diameter of not less than 35 mm and not more than 35 mm.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A composite laminated beam according to the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an end of an embodiment of the composite laminated beam according to the present invention. As shown in FIG. 1, the composite laminated beam of the present embodiment has a
The laminated composite beams 1 for houses are formed by embedding and bonding bar-shaped steel materials 11, 11,... Between the laminations 0, 10,..., And the lamina 10, located at the uppermost and lowermost portions in the thickness direction. 10
The steel materials 11, 11 are combined inside. Further, the bending Young's modulus of the lamina 10 used for the outer layer A, which is 1/8 the thickness of the beam material from the upper surface and the lower surface of the beam material 1, is 85 × 10 ³ kgf / cm ² or more, respectively. Outer layer A
The middle layer B which is 1/8 of the thickness of the beam material further inside
The bending Young's modulus of the lamina 10 used in the above is 75 × 10 ³ kgf / cm ² or more, and the lamina 10 is used for the inner layer C which is a half of the thickness of the beam material further inside from the intermediate layer B. The bending Young's modulus of the obtained lamina 10 is set to 65 × 10 ³ kgf / cm ² or more.

Further, in the composite laminated beam 1 of the present embodiment, the cross-sectional dimension of the beam 1 has a thickness h = 150 mm or more and 360 mm or less,
The width is 85 mm or more and 105 mm or less.
The cross-sectional dimensions of 11 are 13mm or more and 16mm or less in thickness and 4.5 in width
mm and 8 mm or less, and at least four beams 1 are arranged at the same distance from the upper surface and the lower surface of the beam 1.

One embodiment of the composite laminated beam according to the present invention will be described in more detail. The composite laminated beam 1 is made of the above lamina 10,
Are laminated on the upper surface of the second lamina 10 from the uppermost surface and the lower surface of the second lamina 10 from the lowermost surface, and the steel materials 11 and 11 are formed in the grooves.
Is buried. The laminated lamina 10,10 ...
The total thickness h, that is, the thickness h of the beam 1 is 150 mm or more.
It is preferable that it is within a range of 60 mm or less as a composite laminated beam for a house building. The width of the beam 1 is 85 mm or more.
It is preferable that the thickness be within a range of 105 mm or less as a composite laminated beam for home building. Further, the steel materials 11, 11,.
It is preferable that the thickness is 13 mm or more and 16 mm or less and the width is 4.5 mm or more and 8 mm or less as a composite laminated beam for home building.

The thickness of the lamina 10 in FIG.
The width of the composite laminated beam 1 is 210 mm and the width is 85 mm. The steel materials 11, 11,... Have a cross section of 16 mm in thickness and 4.5 mm in width, and are disposed over the entire length of the composite laminated beam 1 at positions 20 mm inward from the side surfaces.

As described above, from the uppermost surface and the lowermost surface, the portion of h / 8 is the outer layer A, the portion of the inner h / 8 is the intermediate layer B, and the inner layer is the inner layer B. When the portion of h / 2 is the inner layer C, the bending Young's modulus of the lamina 10 used for the outer layer A is set to 85 × 10 ³ kgf / cm ² or more. The bending Young's modulus of the lamina 10 used for B is set to 75 × 10 ³ kgf / cm ² or more, and the bending Young's modulus of the lamina 10 used for the inner layer C is 65 × 10 ³ k
gf / cm ² or more.

At this time, when a plurality of the laminas 10, 10,... Are arranged in each layer, the bending Young's modulus of the laminas 10, 10,.
.. Refers to the bending Young's modulus of each of the plurality of laminas 10. When the laminated lamina 10 is disposed over two layers, the lamina 10 over the two layers is treated as the lamina of the outer layer with respect to the measurement of the bending Young's modulus of each layer. And

In the present embodiment, the steel material 11 is disposed on the intermediate layer B, but is not necessarily disposed on the intermediate layer B. The thickness of the laminated lamina 10 and the beam Depending on the thickness of the material 1, there is a possibility that it is arranged on the outer layer A.

When the bending Young's modulus of the lamina 10 used for the outer layer A is less than 85 × 10 ³ kgf / cm ² , the bending stiffness of the entire beam 1 is less than that of the Baymatsu first class laminated wood. There is a problem.

In addition, the above-mentioned laminate used for the intermediate layer B
The bending Young's modulus of the screw 10 is 75 × 10 ^Threekgf / cm^TwoIs less than
And the bending stiffness of the beam 1 is the same
There is a problem that less than.

If the bending Young's modulus of the lamina 10 used for the inner layer C is less than 65 × 10 ³ kgf / cm ² , the bending stiffness of the entire beam 1 is equivalent to that of the Baymatsu first class laminated wood. There is a problem that it is not enough.

The material of the lamina 10 is not particularly limited.
For example, inexpensive solid materials, low specific gravity particle lumbars, oriented strand lumbars, veneer laminates, and the like can be used. In the present embodiment shown in FIG. 1, pure cedar wood is used for the lamina 10.

The surface of the steel material 11 is subjected to blast treatment (for example, blast treatment with zinc-iron alloy particles), sanding treatment and chemical treatment (for example, formation of a phosphoric acid-based or chromic acid-based film), or chemical conversion treatment, followed by bonding. It is desirable to increase the adhesion with the agent. By such a treatment, the tensile shearing force is improved by about 20%, and the breaking rate of wood material (wood breaking rate) at the time of breaking increases. The surface of the steel material 11 of the present embodiment shown in FIG. 1 has been subjected to blasting and chromate treatment with zinc-iron alloy particles.

As the adhesive provided between the laminations, an adhesive known per se can be used, and examples thereof include an isocyanate resin. In the embodiment of FIG. 1, KR-7800 (manufactured by Koyo Sangyo Co., Ltd.) is used as the main agent.
100 parts by weight, AJ-1 as a crosslinking agent (manufactured by Koyo Sangyo Co., Ltd.)
An adhesive in which 20 parts by weight and 2 parts by weight of SH6040 (manufactured by Dow Corning Toray Silicone Co., Ltd.) are used as a coupling agent is used.

The structure of each layer of the lamina 10 and the cross-sectional size of the steel material 11 constituting the composite laminated beam 1 are theoretically calculated from the following equation (I) and the target bending rigidity. You can ask. _{MOE = ((E S I S} + E W I W) / I) × α ······ (I) MOE: Bending Young's modulus of the entire composite assembly beam members E _S: Bending Young's modulus of the steel sheet I _S: steel Moment of area E _S I _S : Bending stiffness of steel sheet E _W : Bending Young's modulus of each lamina I _W : Cross-section second moment of each lamina E _W I _W : Bending rigidity of each lamina I: Overall composite beam the second moment of alpha: the ratio between the actual measurement value and the theoretical value (0.9 to 1.0) However, if the lamina plurality (n sheets) are stacked, section above E _W I _W is laminated each lamina The sum of the bending stiffnesses E _W1 I _W1 + E _W2 I _W2 +... + E _Wn I _Wn is obtained.

FIG. 2 shows the same steel materials 11, 11 as in FIG.
Another embodiment of the present invention is shown together with the embodiment shown in FIG. FIG. 2A shows the embodiment shown in FIG. FIG. 2B shows the lamina 10 in eight stages, and FIG.
(c) shows lamina 10 in 9 layers, FIG. 2 (d) shows lamina 10 in layers, and FIG. 2 (e) shows lamina 12 in lamination. In each case, the steel materials 11, 11,. It is arranged on the inner surface of the lamina 10 located at the bottom. The lamina 10 in the composite laminated beam 1 shown in FIGS.
Have the same cross-sectional shape as the embodiment shown in FIG. 1, and the steel material 11 in the composite laminated beam 1 shown in FIGS. 2 (b) to 2 (d) is also shown in FIG. It has the same cross-sectional shape as the embodiment. However, the steel material 11 in the composite laminated beam 1 shown in FIG. 2E has a cross section of 13 mm × 6 mm according to the cross-sectional shape of the composite laminated beam 1 at a position 19 mm inward from the side surface. It is arranged in.

Next, another embodiment of the composite laminated beam according to the present invention is shown in FIG. The composite laminated beam 1 of the present embodiment has a structure shown in FIG.
1 in that the lamina 10 used for the outer layer A, the intermediate layer B, and the inner layer C has the same bending Young's modulus as the embodiment shown in FIG. 1 as in the embodiment shown in FIG. Although there is no difference from the embodiment, in the composite laminated beam 1 of the present embodiment, a plate-shaped steel plate 12 is used instead of the bar-shaped steel material 11 as in the embodiment shown in FIG.
Are arranged. The steel sheet 12 has a cross-sectional dimension of 1.6 mm or more and 2.3 mm or less and a width of 80 mm or more.
mm or less, and at least two beams 1 are arranged at the same distance from the upper surface and the lower surface of the beam 1.

For this reason, it is not necessary to provide a groove or the like in the laminator 10, and it is only necessary to laminate and bond the lamina 10 together. As the lamina 10, the same one as the composite laminated beam 1 shown in FIG. 1 described above can be used.
The steel plate 12 is preferably subjected to the same surface treatment as the steel 11 in the composite laminated beam 1 shown in FIG. 1 described above. The steel plates 12, 12 have a thickness of 1.6
It is preferable for the composite laminated beam for residential construction to have a width of 80 mm or more and 2.3 mm or less and a width of 80 mm or more and 105 mm or less. The dimensions of the lamina 10 of the present embodiment are the same as the lamina 10 of the embodiment shown in FIG. 1, and the dimensions of the steel plate 12 are 1.6 mm thick and 80 mm wide.

FIG. 4 shows the same steel plates 12, 12 as in FIG.
A further embodiment of the present invention with... Is shown together with the embodiment shown in FIG. FIG. 4A shows the embodiment shown in FIG. And FIG. 4 (b) shows the lamina 10 in eight stages,
FIG. 4 (c) shows lamina 10 in nine stages, and FIG. 4 (d) shows lamina 10
FIG. 4 (e) shows a lamination of twelve laminas. In each case, the steel materials 11, 11,... Are arranged on the inner surface of the lamina 10 located at the top and bottom. Note that FIG.
The lamina 10 in the composite laminated beam 1 shown in (e) has the same cross-sectional shape as the embodiment shown in FIG. 3, and is shown in FIGS. 4 (b) to (d). The steel plate 12 in the composite laminated beam 1 also has the same cross-sectional shape as the embodiment shown in FIG. However, the steel plate 12 in the composite laminated beam 1 shown in FIG. 4E has a thickness of 2.3 mm and a width of 80 mm according to the cross-sectional shape of the composite laminated beam 1.
Is used.

According to the composite laminated beam 1 of the embodiment shown in FIGS. 1 to 4 described above, when a joist or the like is attached to the composite laminated composite beam 1 and nailed, the steel 11
Since the steel plate 12 and the steel plate 12 are arranged inside the laminator 10 having a thickness of 25 mm or more and 35 mm or less, the steel material 11 and the steel plate 12 do not obstruct the work such as nailing. Especially,
With regard to the composite beam having the steel plate 11, the nail can be nailed to the woody portion between the steels 11 arranged on the same lamina. Therefore, the steel 11 does not hinder nailing. In addition, the steel material 11 and the steel plate 12 can sufficiently exhibit a reinforcing effect, and can impart sufficient strength to the composite beam.

Further, in the embodiment shown in FIG. 1 described above, at least four of the steel members 11 are arranged at the same distance from the upper surface and the lower surface of the beam member 1 and are shown in FIG. In the embodiment, since at least two of the steel plates 12 are arranged at the same distance from the upper surface and the lower surface of the beam 1, the strength neutral axis of the beam 1 is located at the center in the thickness direction. Since the distance from the steel material 11 and the steel plate 12 on the upper surface side and the lower surface side to the neutral axis becomes maximum and the second moment of area related to the neutral axis becomes maximum, the beam material efficiently increases the bending rigidity. Can be improved.

The composite laminated beam of the present invention is not limited to the above embodiment. For example, in the embodiment shown in FIGS. 1 and 3 described above, the steel member 11 and the steel plate 12 are arranged over the entire length of the composite laminated beam member 1. However, in consideration of manufacturability and the like, About 50 mm from the end, there may be a portion where the steel material 11 and the steel plate 12 are not arranged. Further, other points can be appropriately changed without departing from the spirit of the present invention.

[0031]

According to the composite laminated beam of the present invention, the effect of improving the bending performance of the steel plate or the steel material can be sufficiently exhibited without impeding the processing such as nailing.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an end of an embodiment of a composite laminated beam according to the present invention.

FIG. 2 is a side view of an end portion of another embodiment of the composite laminated beam according to the present invention, wherein (a) to (e) are different in the number of laminated laminas.

FIG. 3 is a perspective view showing an end of another embodiment of the composite laminated beam according to the present invention.

FIG. 4 is an end side view of still another embodiment of the composite laminated beam according to the present invention, wherein (a) to (e) differ in the number of laminated laminas.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Composite laminated beam 10 Lamina 11 Steel 12 Steel plate A Outer layer B Middle layer C Inner layer

Claims (5)

[Claims] Claims 1. A composite laminated beam for a house, in which a bar-shaped steel material is buried and bonded or a plate-shaped steel plate is laminated and bonded between laminations of woody lamina, located at the top and bottom in the thickness direction. The steel material or the steel plate is compounded inside the lamina, and the bending Young's modulus of the lamina used for the outer layer that is 1/8 of the thickness of the beam from the upper and lower surfaces of the beam is 85 × 10 ³ kgf / cm ² or more, and the bending Young's modulus of the lamina used for the middle layer, which is 1/8 the thickness of the beam material further inside from the outer layer, is 75 × 10 ³ kgf / cm ² or more. The bending Young's modulus of the lamina used for the inner layer, which is half the thickness of the beam material further inside from the intermediate layer, is 65 ×
A composite laminated beam material characterized by being at least 10 ³ kgf / cm ² . 2. The cross-sectional dimension of the beam material is 150 mm or more in thickness.
The composite laminated beam according to claim 1, wherein the composite laminated beam is 360 mm or less and a width of 85 mm or more and 105 mm or less. 3. The steel material has a cross-sectional dimension of 13 mm or more and 16 mm or more.
3. The composite assembly according to claim 1, wherein the width is 4.5 mm or less and the width is 4.5 mm or more and 8 mm or less, and at least four beams are arranged at the same distance from the upper surface and the lower surface of the beam. Beam material. 4. A cross-sectional dimension of the steel sheet is 1.6 mm or more in thickness.
3. The composite assembly according to claim 1, wherein the width is at least 2.3 mm and the width is at least 80 mm and at most 105 mm, and at least two of the beams are arranged at the same distance from the upper surface and the lower surface of the beam. Beam material. 5. The composite laminated beam according to claim 1, wherein the thickness of the lamina is 25 mm or more and 35 mm or less.