JPH08232399A - Beam material, and framework structure using the material - Google Patents

Abstract

PURPOSE: To attain unitization by providing a beam material, in which a beam rear can be kept constant regardless of a withstand load required and beam length, while using such a beam material. CONSTITUTION: A groove section is provided concavely in the opposite direction extending over overall length in the underside of a beam material 1, the beam material 1 is turned upside down, and an FRP resin as a high-strength material 3 to make the beam material have a strength higher than wood after its curing, is introduced into the groove section. The FRP resin is cured, the upper section of the FRP resin is filled with fire-resistant gypsum as a non-combustible material, and the groove section is closed so as to be formed in the same surface as the underside of the beam material 1. The thickness of the fire-resistant gypsum is formed to the extent that the fire-resistant gypsum reaches the non-combustible section of the beam material 1. Regarding a beam material 7 used at a place having large withstand load requirement and a place having long beam length, a groove section is formed in width C wider than width A, and strength is increased while a beam rear is formed in the same surface as the beam material 1, and heights to the top faces and the undersides of the beam materials 1, 7 are made to have a constant value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam and a frame structure using the beam.

[0002]

2. Description of the Related Art As shown in FIG. 4, in a conventional wooden building structure, a plurality of beams, girders, which are orthogonally combined with columns,
As the body insert (generally referred to as a "beam member" hereinafter), those having different beam backs are used according to the load and the beam length to be received. Therefore, when the beam back is different, the height to the beam lower surface (hereinafter referred to as “beam lower height”) usually varies depending on the location. Recently, various wooden construction units have been proposed mainly for the purpose of reducing housing construction costs, and standardization of each member dimension is required. Various types of building materials, such as various wall panels and studs, installed between the two were increasing, and it was not possible to thoroughly reduce the types of building materials and simplify design and construction. Even if the beams with different beam heights are assembled so that the height under the beams is constant, the heights of the tops of the beams will not be the same this time, making it difficult to standardize the dimensions of the roof assembly and the second-story bar. Will happen.

[0003]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a beam member whose beam back can be made constant regardless of the required load bearing capacity and beam length, and by using such a beam member. , It is to provide a frame structure that is easier to unitize.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a beam material in which a wooden beam is combined with a high-strength material having a higher strength than the wooden beam in the longitudinal direction. The cross section of the strength material is increased or decreased to form a constant beam back. As the high-strength material, preferably, a groove portion is provided on the lower surface of the beam over the entire length, and a resin material is poured into the groove portion and hardened, and a flame retardant material is applied on the groove portion to close the groove portion.

In addition, by using the beam material as described above,
It has a frame structure that assembles the joint position with the pillar to a certain height, and more preferably, it is a joint that supports high strength materials as well as joints of the conventional frame method using mortises and mortises. It is advisable to interpose a metal fitting between the side surface of the column and the end surface of the beam so as to assemble the column and the beam.

[0006]

According to the present invention, when the withstand load is large or the beam length is long, the cross-sectional area of the high-strength material is large, and in the opposite case, the cross-sectional area of the high-strength material is small, so that Can be constant. This makes it possible to make the height under the beam and the height up to the top of the beam uniform, so that it is easy to reduce the size species of various wall panels, studs, etc., and it is possible to standardize the dimensions of various building materials. As the high-strength material, any material having a strength higher than that of wood in part or all of bending stress, shearing stress, bending stress and the like required for the beam material can be applied. For example, iron material may be attached to the lower half of the beam in an appropriate place, or a groove with a depth of about half of the beam spine may be recessed upward at the widthwise center of the lower surface of the beam, and the groove may be fitted inside the groove. The cross-sectional area may be adjusted by changing the, but after hardening, the resin, which has higher strength than that of wood, is housed in the groove that is recessed upward, and the cross-sectional area is adjusted by expanding and contracting the groove width. Doing so is extremely advantageous in terms of workability. Alternatively, the laminated member may be used as the beam member and the groove may be formed by a method of removing a part of the core member of the laminated member. As the resin used here,
It may be thermosetting or thermoplastic, and may contain various compounding agents such as a reinforced type in which various long fibers and short fibers are mixed, a stabilizer, a curing agent, an addition type or a reactive flame retardant.
For example, FRP, polycarbonate, and polyethersulfone resin.

Considering that a high temperature of 1000 ° C. or higher can be maintained for several tens of minutes during a fire, even if a flame-retardant resin is used as a high-strength material, its heat resistance is a problem, but it remains constant. For wood with the above thickness and thickness, even if a house is fired, only the surface part of a certain depth is carbonized, and this functions as a heat insulating material, so the core wood itself does not generate combustible gas and ] Remains as. The present inventors have noticed that the thermal disadvantage can be eliminated by locating the cured resin as a high-strength material inside the beam at this non-combustible portion, and in the groove portion provided with the resin in the beam material, that is, It was placed on the non-combustible part of the wood, and the groove near the burnable surface part was covered with a flame-retardant material. The flame-retardant material may be publicly known gypsum / cement for fire and fire protection, and its thickness should be minimized within a range that can maintain heat insulation to the extent that combustible gas is not generated from the incombustible part. Is desirable. The reason is that if the thickness of the flame-retardant material is too large, the cured resin as a high-strength material is relatively positioned in the upper direction of the beam, and the strength of the entire beam material decreases.

Further, by using the beam member as described above,
Since the joint position with the pillar is built up to a certain height, it is easy to align the vertical type of various building materials such as wall panels and studs that are assembled on the upper and lower sides of the beam, making it easy to arrange It is advantageous for unitization of the whole. Furthermore, for example, when a support metal fitting that penetrates pins and bolts from the side surface of the beam to support high-strength materials together is interposed between the side surface of the column and the end surface of the beam and the frame of the column and the beam is assembled, It is more advantageous to assemble the beam joints at the same height, and the joint strength is more reliable. The reason for this is that high-strength materials are installed near the bottom of the central part of the beam material, but joints using joints such as mortises and fasteners of the type that fixes from the side of the beam or column and daggers are also used. This is because with the structure, it is difficult to directly support the high-strength material, and the high-strength material may come off or come off from the beam material.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. The parts common to the conventional example and the parts common to the respective embodiments are designated by the same reference numerals, and the duplicated description will be omitted.

FIG. 1 shows a cross section of a beam 1 according to the present invention.
The beam 1 is made of single wood or laminated wood, and a groove 2 is formed upside down over the entire length of the beam 1.
The groove 2 is located at the center of the beam 1 in the width direction, and the groove depth D is half the beam back H in the figure.

The beam 1 is reversed, and the FRP resin 4 as the high-strength material 3 which is stronger than wood after hardening is put in the groove 2. After the FRP resin 4 is hardened, a refractory gypsum 5 as a non-combustible material is filled therein and closed so as to be flush with the lower surface of the beam 1. The thickness B of the refractory gypsum 5 depends on the non-combustible portion 6 of the beam 1.
It is about to reach. The groove width of the portion where the refractory gypsum 5 is present may be formed to be slightly wider than the width A of the portion of the high-strength material 3 to allow a safety margin of heat insulation to the resin 4. The dotted line X in the figure is an imaginary line indicating the boundary between the non-combustible portion 6 and the surface portion that can be burned and carbonized.

As shown in FIG. 2, in a beam member 7 used in a place where a required load capacity is large or a place where the beam length is long, the groove portion 2 is formed to have a width C wider than the width A and a beam back H is formed. It is made to have the same strength as that of the beam member 1 to increase the strength.

Considering only the bending stress on the beam 1, for example, when the high-strength material 3 is arranged in a state where it is firmly connected to the wood as shown in FIG. 1, the groove width A and the groove depth are D (half of beam back H), and further, refractory gypsum 5 is not applied for simplification of calculation, and the neutral boundary of compressive / tensile stress does not move from the beam back up and down center, and high strength. Assuming that the upper half of the beam material bears the reaction force of the tensile stress of the material, the design stress of the beam material 1 is M = 1/6 · f _W · WH ² +1/6 (f _K −f _W ) · A (1 / 2H) ² (1) (However, M: bending moment, f _W : allowable stress of wood, f _K : allowable stress of high strength material, W: beam width, H: beam back, A : Groove width).

Assuming that W = 12 cm, H = 20 cm, f _W = 1
If the load P is applied to the center point of a beam with a beam length of 4 m with 20 kg / cm 2 and f _K = 2000 kg / cm, M = 20
Since it is 0 × 200/400 × P, substituting it into the equation (1) gives P when A is 0 cm, that is, when the high-strength material 3 does not exist.
_{When max} = 960 (kg) and A is 0.5 cm, P _max ≈1
116 (kg), when A is 1 cm, P _max ≈ 1273 (kg)
Therefore, it can be seen that the withstand load can be increased with the beam back H kept constant. Therefore, it is possible to make the beam back of the beam member constant in the portion where a high P _max is required and in the portion where a low P _max is sufficient.

When it is not possible to adjust the cross-sectional area increase / decrease of the high-strength material only by expanding / contracting the widths A and C of the groove portion 2, the depth D of the groove portion 2 is also adjusted. As shown in the figure, when the heights of the joint positions of the pillars 8 and the beam members 1 and 7 are combined to be constant, the upper and lower surfaces of the beams 1 and 7 are aligned at the same height, and a wall panel or a stud (not shown) is provided. It is easy to align the size species such as.

When the end faces of the beam members 1 and 7 are surface-bonded to the side faces of the column 8, a support fitting 9 as shown in FIG. 3 is used. Each of the support fittings 9 is formed by bending the pair of vertical sides of the mounting surface 10 to the pillar 8 so that the insertion surface portions 11 are orthogonal to each other, and has a substantially U-shaped cross section. A bottom plate 12 is formed on the lower sides of both insertion surface parts 11 to support and support the lower surface of the beam end together with the high-strength material 3. Through holes 14 are provided in the insertion surface portion 11 so as to correspond to the through holes 13 on the side surfaces of the beam members 1 and 7. After fixing the support fitting 9 with the fixing bolt 15, the slit grooves 16 of the beam members 1 and 7 are fixed.
Is inserted from above the support fitting 9, the bottom plate 12 supports the lower surfaces of the beam members 1 and 7 and the high-strength member 3. After that, the pin 17 is inserted through the through hole 13 and is joined in a state where the high strength material 3 is also penetrated.

Although not shown as an example, an iron plate can be used as the high-strength material 3 provided in the groove portions 2 of the beam members 1 and 7. In this case, it is not necessary to close the groove 2 with the refractory gypsum 5, and a long rectangular iron plate having the same length as the beam length and the width of the groove depth D may be fitted into the groove 2.

[0018]

As described above, according to the present invention, the high-strength material is extended in the longitudinal direction inside the beam material, and when the withstand load is large or the beam length is long, the cross-sectional area of the high-strength material is reduced. Since the beam height is made large, and in the opposite case, the cross-sectional area of the high-strength material is made small so that the beam back is made constant, this makes it possible to construct a frame structure in which the beam lower height and the beam upper surface are uniform. Can be Therefore, it is easy to reduce the size species of various wall panels and studs, and it is possible to standardize the dimensions of various building materials. When a resin, which has higher strength than wood after curing, is used as the high-strength material, the beam material as described above can be obtained with good workability, and the cured resin is applied to the non-combustible portion inside the beam material. Since it is arranged, the thermal disadvantage of the resin can be covered.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a beam material according to the present invention.

FIG. 2 is a perspective view in which a beam member according to the present invention is combined with a column.

FIG. 3 is an exploded perspective view for explaining in detail the joining of a pillar and a beam using a support fitting.

FIG. 4 is a partial schematic view showing a conventional frame structure.

[Explanation of symbols]

 1, 7 Beam material 2 Groove part 3 High-strength material 4 Resin material 5 Fire-resistant gypsum (flame-retardant material) 8 Pillars 9 Support metal fittings

Front page continuation (71) Applicant 595029842 Mamoru Tachibana 1392-1 Nozuta-cho, Machida-shi, Tokyo (72) Inventor Shinji Hashimoto 924-51, Utsuki-cho, Hachioji-shi, Tokyo

Claims (4)

[Claims] 1. A beam material comprising a wooden beam and a high-strength material having a higher strength than that of wood in the longitudinal direction, wherein the cross-sectional area of the high-strength material is increased or decreased according to the required load capacity and beam length. Beam material with a constant beam height regardless of the beam length. 2. A groove portion is provided on the lower surface of the beam, and a resin material is poured into the groove portion to be hardened to be a high-strength material, and a flame-retardant material is applied on the high-strength material to close the groove portion. 1
Beam material described. 3. A frame structure using the beam member according to claim 1 or 2 to assemble a joint position between a column and the beam member at a constant height. 4. The frame structure according to claim 3, wherein the beam end surface is joined to the side surface of the column by surface-bonding the beam with the support metal member interposed therebetween, and the support metal member also supports high-strength materials. Construction.