JP2001227086A - Bearing wall of wooden building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing wall of a wooden building which has the high initial rigidity and the maximum bearing force equivalent to that of a structural plywood, and is free from any rapid deterioration in the bearing force when the shear deformation angle is increased, and hardly damaged at a nail-driven part by the repeated load, and demonstrates the relatively excellent fireproof performance. SOLUTION: The bearing wall by a wooden framework method or a platform frame method has a configuration in which face plates 11 and 12 are fixed to wooden structural members 4, 5, 6, 7, 8 and 9 constituting a wall substrate by nails 15. The face plates are a plate with a thickness of >=6 mm and having a gypsum core with a fibrous reinforced sheet embedded over the entire area of a surface layer on both sides, or a gypsum board containing inorganic fibers therein in which both sides of the gypsum core containing inorganic fibers are covered by a cardboard.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load-bearing wall of a wooden structure, and more particularly to a load-bearing wall of a wooden frame construction method and a frame wall method capable of setting a wall magnification of 2.0 or more. It is about.

[0002]

2. Description of the Related Art In general, the construction method of a wooden structure is roughly divided into a wooden frame construction method and a frame wall construction method. Regardless of the construction method, the building must have sufficient seismic and pressure resistance to withstand short-term horizontal loads during an earthquake or storm. As an index indicating the strength of a wooden building that resists a short-term horizontal load, a frame length of a load-bearing wall that is effective in structural strength in a gap direction and a beam direction of the building is generally used. In calculating this kind of frame length, the wall ratio corresponding to the structure of the load-bearing wall is used, and the strength of the load-bearing wall against short-term horizontal load is proportional to the value obtained by multiplying the wall ratio of the load-bearing wall by the wall length. It is believed that. Therefore, the resistance of the building to the short-term horizontal load is determined based on the value obtained by summing the numerical values in the gap direction and the row direction.

[0003] The wall magnification of a load-bearing wall is usually determined on the basis of a test result of a horizontal load test called an in-plane shear test. In this type of horizontal force test, a horizontal force is applied to the top of the load-bearing wall model, and the short-term allowable shear strength of the load-bearing wall is determined by measuring the horizontal displacement of the wall top. The wall magnification is finally determined in consideration of a predetermined safety factor or a reduction factor based on the short-term allowable shear strength.

[0004]

Of the various load-bearing wall board materials currently in use, it is generally believed that structural plywood exhibits relatively good horizontal loading test results. That is, in the case of a load-bearing wall model using a structural plywood as a face material, generally, initial rigidity appears relatively low, but maximum strength is large, and strength deterioration due to an increase in shear deformation angle does not significantly occur. . Therefore, a relatively high wall magnification can be applied to a load-bearing wall using a structural plywood. However, structural plywood is inferior in fireproof performance as compared with inorganic board materials such as gypsum board and calcium silicate board, and is not always desirable in improving fireproof performance of buildings.

On the other hand, an inorganic board material such as a gypsum board is advantageous in improving the fire resistance of a building, and has a relatively high initial rigidity. However, load-bearing walls using a common inorganic board material as a face material have a lower maximum strength than those of structural plywood, and have a tendency to deteriorate relatively quickly due to an increase in the shear deformation angle. Show. In addition, in the case of an inorganic board material nailed and fixed to a wooden structural member, damage to the nailing portion due to a repeated load is apt to occur. There are circumstances that are difficult to adopt.

[0006] The present invention has been made in view of such circumstances, and aims at high initial rigidity,
It possesses a maximum strength equivalent to that of structural plywood, does not suddenly deteriorate in strength when the shear deformation angle increases, does not easily damage the nailing part due to repeated loads, and has a relatively good protection. An object of the present invention is to provide a load-bearing wall of a wooden structure capable of exhibiting fire resistance.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a load-bearing wall of a wooden structure, in which a surface material is fixed to a wooden structural member constituting a wall foundation. The face material is made of a gypsum core plate having a thickness of 6 mm or more, and a fibrous reinforcing sheet material is buried over the entire surface layer in the vicinity of both surfaces of the gypsum core material. To provide load-bearing walls for timber-structured buildings. The present invention also provides
In a load-bearing wall of a wooden structure in which a surface material is fixed to a wooden structural member constituting a wall foundation, the surface material is an inorganic material obtained by coating both sides of a gypsum core material containing inorganic fibers with paperboard. Provided is a load-bearing wall of a wooden structure, which is made of a gypsum board containing fibers.

[0008] According to the above configuration of the present invention, the reinforcing sheet material is buried at a slight depth from the surface of the gypsum core to reinforce the face material and improve the toughness of the face material. Further, the inorganic fibers are mixed into the gypsum core material, and increase the toughness and strength of the face material. The face material composed of a gypsum core material as a base material not only exhibits fireproofing performance that can be used as a noncombustible material or a quasi-noncombustible material, but also has a relatively high specific gravity and is as high as a conventional inorganic board material. Exhibits initial rigidity. Moreover, the reinforcing sheet material embedded in the surface layer, or the inorganic fiber mixed into the core material, reinforces the cross-sectional defect of the nailed portion and at least partially bears the internal stress that repeatedly acts on the nailed portion,
As a result, the toughness of the face material around the nailed portion increases. Therefore, the nailing portion of the face material resists a short-term horizontal load that repeatedly acts, and prevents damage or breakage of the nailing portion due to this kind of horizontal load. Is unlikely to occur. Thus, the load-bearing wall of the present invention exhibits an initial rigidity higher than that of the structural plywood in the horizontal load test, retains the same maximum strength as the structural plywood, and furthermore, maintains a desired load-bearing resistance against repeated loads. Demonstrate performance.

[0009] In the face material in which the reinforcing sheet material is embedded, the outer surface of the face material is formed by the surface of the gypsum core material,
Since it has an aesthetic appearance or a design that can be used as an interior finishing wall surface, it is possible to construct a plate by a bare-lining method using a color nail or the like, if desired. After subjecting the plate body to a sealer treatment or a primer treatment on the indoor side surface, it can be subjected to an arbitrary interior finishing treatment such as painting or cross bonding. On the load-bearing wall, a plate substantially the same as the plate may be further laminated on the indoor side surface. In this case, since the plate body does not have an exposed surface sheet material such as a conventional gypsum board surface board paper, phenomena such as interface peeling or in-layer peeling between the gypsum core material and the surface sheet material. Is
It can certainly be avoided.

On the other hand, in the case of a face material made of a gypsum board containing inorganic fibers, an interior finish similar to that of a conventional gypsum board,
For example, an arbitrary interior finishing treatment such as painting or cloth attachment can be performed. An equivalent gypsum board or a general-purpose gypsum board may be further laminated on the indoor side surface of the gypsum board containing inorganic fibers.

[0011]

According to a preferred embodiment of the present invention, the wooden structural member comprises a frame member of a wooden building, and constitutes a load-bearing wall of the wooden frame construction method. According to another preferred embodiment of the present invention, the wooden structural member comprises a frame member of a wooden building, and constitutes a load-bearing wall of the wooden frame wall construction method.

According to a further preferred embodiment of the present invention, the plate is made of a gypsum plate containing a glass fiber nonwoven fabric, in which glass tissue as the reinforcing sheet material is embedded in both surfaces of a gypsum core. ~ 1.3, preferably
It has a specific gravity in the range of 0.9 to 1.2. According to another embodiment of the present invention, the plate comprises a glass fiber-filled gypsum board in which both sides of a gypsum core containing 0.5 to 5.0% by weight of glass fiber are covered with paperboard, 0.8-1.
5, preferably having a specific gravity in the range of 0.9 to 1.4. According to such a configuration, the distance from the edge of the face material to the nailing portion can be reduced to about 7 mm.
Compared to the conventional configuration requiring a distance of about 15 mm, the workability or workability of nailing work can be greatly improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a first embodiment of the present invention.
It is the front view, longitudinal section, and cross section showing the composition of the load-bearing wall of the wooden frame construction method concerning an example.

In FIG. 1, a base 2 is fixed to an upper surface of a reinforced concrete cloth foundation 1 by anchor bolts 3. The first-floor level load-bearing wall W1 includes a base 2, a lower receiving member 4 fixed on the base 2, a vertical column 5 and studs 6, 7 arranged on the base 2 at a predetermined interval, and a column. 5
A horizontal body tie 8 and a beam (or a body difference) 10 supported at the middle and upper ends of the above, an upper receiving material 9 fixed to the lower surface of the beam 10, a column 5, studs 6, 7 and a receiving material 4, And board materials 11 and 12 fixed to the base material 9. The load-bearing wall W2 at the second floor has substantially the same configuration as the load-bearing wall W1 except that it is constructed on the beam 10. FIG. 1 partially shows the lower receiving member 4, the pillar 5, the studs 6 and 7, and the lower end of the board material 11 that constitute the load-bearing wall W <b> 2.

The base 2, the pillar 5 and the beam 10 are 105 mm × 1
It has a cross-sectional dimension of at least 05 mm, and the stud 6 is 45 mm × 10
It has a cross-sectional dimension of 5 mm or more, and the stud 7 is 30 mm ×
It has a cross-sectional dimension of 105 mm or more. Receiving materials 4 and 9 are 30
It has a cross-sectional dimension of at least 30 mm x 30 mm.
It has a cross-sectional dimension of at least mm × 40 mm.

The board materials 11 and 12 are made of a gypsum board containing a glass fiber nonwoven fabric. A gypsum board containing a glass fiber nonwoven fabric is a gypsum board in which glass tissue is embedded on both sides of a gypsum core, and is manufactured, for example, according to a manufacturing method disclosed in Japanese Patent Publication No. 3-70607. As the gypsum board containing the glass fiber nonwoven fabric, the product “Glass Rock” of the present applicant can be preferably used.

In this example, the board material 11 is 910
mm × 1820mm width and height, board material 1
2 has a width and height dimension of 910 mm x 606 mm.
Boat material 11, 12 is 6mm, 9.5mm or 12.5m
m having a thickness of 0.8 to 1.2, preferably
It has a specific gravity in the range of 0.9 to 1.1.

The board materials 11 and 12 are vertically arranged on the interior wall surface, and are fixed to the lower receiving member 4, the pillars 5, the studs 6, 7, the trunk joint 8 and the upper receiving member 9 by nails 15. The mutual interval between the nails 15 is set to 150 mm or less. The distance between the outer edges of the board materials 11 and 12 and the nails 15 should be at least 7 mm, and the nails 15 can be driven near the outer edges. For this reason, the workability of the board tensioning work in a limited work space or the workability of the board tensioning work corresponding to a complicated wall form is greatly improved. This is in comparison with the conventional configuration that required to secure at least 10 mm to 15 mm between the nailing portion and the board edge.
Very useful in practice.

FIG. 2 is a sectional view of the board materials 11 and 12. The board materials 11 and 12 are formed plates 13 of a gypsum material.
The glass tissue 14 is embedded in the surface layer on both sides of the molded plate 13. The surfaces of the board materials 11 and 12 can be subjected to a paint finish or a cloth finish after the sealer treatment. The glass tissue 14 embedded at a small depth from the surfaces of the board materials 11 and 12 reinforces the formed plate 13 and improves the toughness of the formed plate 13.
The molded plate 13 has flexibility that allows for curved surface construction. Since such board materials 11 and 12 are based on a gypsum core material, they not only exhibit fire resistance performance usable as a non-combustible material, but also have a relatively high specific gravity and exhibit desired sound insulation performance. I do. In addition, the glass tissue 13 bears and disperses the internal stress that repeatedly acts on the nailing site, thereby reinforcing the cross-sectional defect of the nailing site and increasing the toughness of the nailing site. Therefore, the board material 11,
Twelve nailing sites are less likely to be damaged or broken by short-term horizontal loads that act repeatedly.

Regarding the wall model of the load bearing walls W1 and W2,
As a result of the in-plane shear test, it was found that the load-bearing walls W1 and W2 exhibited much higher initial rigidity and maximum strength than the gypsum board wall model. In addition, bearing wall W
1, W2 exhibited the same initial rigidity as the wall model of the structural plywood, and exhibited the same maximum proof stress as the wall model of the structural plywood. Moreover, in the in-plane shear test, the wall models of the load-bearing walls W1 and W2 do not cause damage or breakage of the nailed portion due to the repeated load, and do not cause a sudden decrease in the proof stress due to a decrease in the strength of the nailed portion. , Bearing wall W1, W2
Exhibited the desired toughness.

FIG. 6 is a table showing test results of a horizontal force test on the wall model of the present embodiment. FIG. 6 compares the test results of the wall model (Example) formed of a gypsum board containing a glass fiber nonwoven fabric with a thickness of 12.5 mm, and the test results of the wall model formed of a gypsum board and a structural plywood, respectively. It is shown as an example. From the test results, it was found that the short-term allowable shear strength of the wall model of the gypsum board containing glass fiber nonwoven fabric (12.5 mm in thickness) can be set to about 570 kgf (/ 1 m 2). In this example, as the short-term allowable shear strength, the load at an apparent shear deformation angle of 1/300 rad., The load at 2/3 of the maximum load (2 / 3Pmax), and the shear strain amount at the maximum load of 1/3. Load corresponding to 4 (1/4
δmax load) was adopted.

Based on the test results, it was found that the wall magnification can be set as follows for the load-bearing walls W1 and W2 using the gypsum plates containing the glass fiber nonwoven fabric of various thicknesses.

Thus, according to the bearing walls W1 and W2 using the gypsum board containing the glass fiber nonwoven fabric, the numerical value of the wall magnification is:
It can be set to at least 2.0.

FIG. 3 is a front view, a longitudinal sectional view, and a transverse sectional view of the load-bearing wall exemplifying the structure of the load-bearing walls W1 and W2 using a single board material 11 corresponding to the wall height.

As shown in FIG. 3, the load-bearing walls W1 and W2 may be provided with a board material 11 by a single sheet of a relatively long gypsum plate containing a glass fiber nonwoven fabric. The value of the wall magnification (2.0 to 3.9) can be applied to W1 and W2 according to the board thickness.

FIGS. 4 and 5 are front views showing the structure of the load-bearing wall of the wooden frame wall construction method according to the second embodiment of the present invention.
In FIGS. 4 and 5, the same reference numerals are given to components substantially the same as or equivalent to the components of the above-described embodiment.

FIGS. 4 and 5 show load-bearing walls W1 and W2 made of a frame member in which a gypsum board containing a glass fiber nonwoven fabric is laid up and down two sheets or a single sheet. In each of the drawings, the load-bearing wall W1 is an end joist (or a side joist) on the base 2.
3 and the load-bearing wall W2 is constructed on an end joist (or side joist) 10 at the upper floor level. The frame member is composed of a lower frame 4, vertical frames 5, 7, a receiving member 8, an upper frame 9, and a head connecting material 6, and board materials 11 and 12 made of a gypsum board containing a glass fiber nonwoven fabric are formed by these frame members. 4, 5,
It is nailed and fixed to 6, 7, 8, 9. Nail 15 is 200
mm and the nail 15 is
It is positioned at a distance of at least 7 mm from the outer edges of 1, 12. The interval between the vertical frames 5 and 7 is 500
mm or less.

An in-plane shear test was performed on the wall models of the load-bearing walls W1 and W2, and the wall magnification was calculated based on the test results. As in the example, a value of 2.0 or more was obtained.

Next, as a third embodiment of the present invention, a board material 11 made of a gypsum board containing glass fiber was added to the frames 4, 5, 6, 7, 8, 9 and 9 shown in FIGS. 12
The load-bearing walls W1 and W2 of the wooden frame construction method in which the steel is nailed and fixed will be described.

The gypsum board containing glass fiber is 0.5 to
It has a configuration in which a gypsum core material containing 5.0% by weight of glass fiber is coated with paperboard (base paper for gypsum board). For example, Japanese Patent Application No. 6-174306 (Japanese Patent Application Laid-Open No. No. 8-42111).

In this embodiment, gypsum boards containing glass fibers having a specific gravity of 0.9 to 1.4, preferably 1.0 to 1.3 are used as the board materials 11 and 12. The board material is composed of the frame members 4, 5, and
It is nailed and fixed to 6, 7, 8, 9. The nails 15 are driven at a distance of at least 7 mm from the outer edges of the board material 11, 12 and at an interval of no more than 150 mm.

As a fourth embodiment of the present invention, board materials 11 and 12 made of gypsum board containing glass fiber are nailed and fixed to frames 4, 5, 6, 7, 8 and 9 shown in FIGS. Then, the load-bearing walls W1: W2 of the wooden frame construction method are formed in the same manner as in the second embodiment. The nail 15 is made of the board material 11,
12 at a distance of at least 7 mm from the outer edge
It is driven into the board material 11, 12 with a mutual spacing of less than mm.

With respect to the wall models of the load-bearing walls W1 and W2 according to the third and fourth embodiments, an in-plane shear test was performed, and the wall magnification was calculated based on the test results. As the wall magnification of W2, a value of 2.0 or more was obtained as in the first and second embodiments.

Although the preferred embodiment of the present invention has been described in detail, the present invention is not limited to the above-described embodiment, and various modifications may be made within the scope of the present invention described in the appended claims. It is needless to say that the modification or the modification is also included in the scope of the present invention.

[0035]

As described above, according to the present invention,
It possesses high initial stiffness and maximum proof strength comparable to structural plywood, without sudden deterioration in proof strength when the shear deformation angle increases, and hardly causes damage to the nailing part due to repeated loading, and more. Provided is a load-bearing wall of a wooden structure capable of exhibiting relatively good fire resistance.

[Brief description of the drawings]

FIG. 1 is a front view, a longitudinal sectional view, and a transverse sectional view showing a configuration of a load-bearing wall of a wooden frame construction method according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing an internal structure of a board material.

FIG. 3 is a front view, a longitudinal sectional view, and a cross-sectional view of a load-bearing wall illustrating a configuration of the load-bearing wall using a single board material corresponding to a wall height.

FIG. 4 is a front view showing a configuration of a load-bearing wall of a wooden framed wall construction method according to a second embodiment of the present invention.

FIG. 5 is a front view showing a configuration of a load-bearing wall of a wooden frame wall construction method according to a second embodiment of the present invention.

FIG. 6 is a table showing test results of a horizontal force test on the wall model of the first embodiment.

[Explanation of symbols]

 W1; W2 Bearing wall 5 pillar 6; 7 stud 11; 12 board material 13 molded plate 14 glass tissue 15 nail

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04C 2/26 E04C 2/26 S (72) Inventor Kozo Fujikawa 2-1-1 Ekita, Adachi-ku, Tokyo Yoshino Gypsum Co., Ltd. Technical Research Laboratory F-term (reference) 2E002 FA00 FB01 FB05 HA03 HB01 JC01 JD01 MA31 MA38 2E162 CA16 CA32 CC06 FA14

Claims (6)

[Claims] 1. A load-bearing wall of a wooden structure in which a surface material is fixed to a wooden structural member constituting a wall foundation, wherein the surface material is a gypsum core plate having a thickness of 6 mm or more. A load-bearing wall for a wooden structure, wherein a fibrous reinforcing sheet material is buried over the entire surface layer in the vicinity of both surfaces of the gypsum core material. 2. A load-bearing wall of a wooden structure in which a face material is fixed to a wooden structural member constituting a wall base, wherein the face material is made of paperboard on both sides of a gypsum core material containing inorganic fibers. A load-bearing wall of a wooden structure, comprising a gypsum board containing inorganic fiber coated. 3. The wooden structural member comprises a frame member of a wooden building, and a load-bearing wall of the wooden frame construction method is formed by the wooden structural member and a face material.
Or the load-bearing wall according to 2. 4. The wooden structural member comprises a frame member of a wooden building, and a load-bearing wall of the wooden frame wall construction method is formed by the wooden structural member and a face material. Load bearing wall as described. 5. The face material is a gypsum board containing a glass fiber nonwoven fabric in which glass tissue is embedded in both surfaces of a gypsum core, and has a specific gravity in the range of 0.8 to 1.3. The load-bearing wall according to claim 1. 6. The face material is a gypsum board containing glass fiber, wherein both sides of a gypsum core containing 0.5 to 5.0% by weight of glass fiber are covered with paperboard. 3. A load bearing wall according to claim 2, having a specific gravity in the range of 5.