JP2024006767A - Junction structure of wooden wall ad skeleton - Google Patents

Abstract

To provide a junction structure of a wooden wall and a skeleton capable of suppressing crack failure during shear deformation for higher bearing capacity.SOLUTION: A junction structure 100 of a wooden wall and a skeleton comprises a first junction part 3 provided at a lower part of an end in a width direction of a wooden wall 1, a second junction part 4 provided at a skeleton 2B and a pin junction part 5 which pin-joints the first junction part 3 and the second junction part 4. The wooden wall 1 has a core material and a face material provided on a surface on at least one side of the core material and the first junction part 3 is provided at a lower end of the core material.SELECTED DRAWING: Figure 1

Description

Application for application of Article 30, Paragraph 2 of the Patent Act (1) Submission date: October 29, 2021 Submission address: Minister of Land, Infrastructure, Transport and Tourism (2) Website publication date: March 11, 2020 Website address: http ://www. sendo-shien. jp/03/comment/

The present invention relates to a joint structure between a wooden wall and a frame.

Conventionally, CLT (Cross Laminated Timber), which is made by laminating and bonding laminated boards alternately so that their fiber directions are orthogonal, is sometimes used as a seismic wall by joining it to a building frame, etc. (Patent Document 1 below) , 2).

JP 2018-80569 Publication Japanese Patent Application Publication No. 2018-188845

However, if shear force is applied to the joint between the wooden wall and the frame, tensile stress will be applied during shear deformation, which may cause splitting failure at the joint.

The present invention has been made in view of the above circumstances, and provides a joint structure between a wooden wall and a frame that can suppress splitting fracture during shear deformation and increase the strength.

In order to achieve the above object, the present invention employs the following means.
That is, the joint structure between a wooden wall and a frame according to the present invention has a first joint provided at the lower part of the end in the width direction of the wooden wall, a second joint provided in the frame, and a second joint provided at the end of the wooden wall in the width direction. A pin joint part for pin-joining the joint part and the second joint part is provided.

In the joint structure between the wooden wall and the frame constructed in this way, the first joint provided at the lower part of the end in the width direction of the wooden wall and the second joint provided in the frame are connected to the pin joint. It is connected with a pin. As a result, the wooden wall and the frame are pin-joined. By pin-joining the ends of the wooden wall in the width direction, it can function as a tensile joint, and, for example, the center of the wooden wall in the width direction can function as a shear joint. Therefore, at the ends in the width direction of the wooden wall where tensile stress acts during shear deformation, splitting fracture due to additional bending can be suppressed and high strength can be achieved.

Further, in the joint structure of a wooden wall and a frame according to the present invention, the wooden wall has a core material and a face material provided on at least one side of the core material, and the first joint The portion may be provided at the lower end of the core material, and the lower end of the face material may be located below the lower end of the core material.

In the joint structure between the wooden wall and the frame constructed in this way, the lower end of the face material of the wooden wall is located below the lower end of the core material. Therefore, exposure of the first joint provided at the lower end of the core material is suppressed, and the appearance can be improved.

Furthermore, in the joint structure between a wooden wall and a frame according to the present invention, a slab may be installed on the frame, and the lower end of the facing material may be in contact with the upper surface of the slab.

In the joint structure between the wooden wall and the frame constructed in this way, the lower end of the face material is in contact with the upper surface of the slab installed on the frame. Therefore, exposure of the first joint, the second joint, and the pin joint is suppressed, and the appearance can be improved.

According to the joint structure between a wooden wall and a frame according to the present invention, it is possible to suppress splitting fracture during shear deformation and increase the strength.

FIG. 2 is a front view showing a joint structure between a wooden wall and a frame according to an embodiment of the present invention. FIG. 3 is a side view and a front view of FIG. FIG. 6 is a side view and a front view of FIG. FIG. 6 is a side view and a front view of FIG.

A joint structure between a wooden wall and a frame according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing a joint structure between a wooden wall and a frame according to an embodiment of the present invention.
As shown in FIG. 1, an upper beam 2A and a lower beam 2B are installed on the upper and lower sides of the wooden wall 1, respectively. The wooden wall-frame joining structure 100 (hereinafter simply referred to as "joining structure 100") according to the present embodiment is a structure that joins the wooden wall 1 and the lower beam 2B. In this embodiment, the upper beam 2A and the lower beam 2B may be collectively referred to as a beam 2.

The beam 2 extends in a first direction along the horizontal direction (the direction of arrow X shown in FIG. 1, etc.). The board surface of the wooden wall 1 faces a second direction (direction of arrow Y shown in FIG. 1 etc.) which is along the horizontal direction and orthogonal to the first direction. The wooden wall 1 has a long shape in the vertical direction (direction of arrow Z shown in FIG. 1 etc.). In each component, the side away from the center in the first and second directions may be referred to as the outside, and the side facing the center may be referred to as the inside. The first direction is sometimes referred to as the width direction.

The wooden wall 1 has a plate shape. The board surface of the wooden wall 1 faces the Y direction. In this embodiment, the thickness of the wooden wall 1 is 240 mm.

FIG. 2 shows how the joining structure 100 and the slab S fit together, and is (a) a side view and (b) a front view.
As shown in FIG. 2, the wooden wall 1 includes a core material 16 and a face material 17. The core material 16 is made of CLT. The core material 16 has a plate shape. Face materials 17 are provided on both sides of the core material 16. The lower surface 17d of the face material 17 is located at the same height as the lower surface 16d of the core material 16.

As shown in FIG. 1, the beam 2 is an H-section steel. The upper beam 2A is arranged above the wooden wall 1 with a gap. The lower beam 2B is arranged below the wooden wall 1 with a gap.

The joint structure 100 is located below both ends of the wooden wall 1 in the width direction. As shown in FIG. 2, the joining structure 100 includes a first joining hardware (first joining part) 3, a second joining hardware (second joining part) 4, and a pin joining part 5.

The first joining hardware 3 has an end plate portion 31 and a joining plate portion 32. The end plate portions 31 are arranged along the lower surface 16d of the core material 16 at both ends of the wooden wall 1 in the width direction. A bolt 34 is inserted into a mounting hole formed in the end plate portion 31 and screwed into the core member 16. A nut 35 is fastened to a portion of the bolt 34 that protrudes beyond the lower surface 16d of the core member 16. Thereby, the end plate portion 31 is joined to the lower surface 16d of the core member 16. As the bolt 34, for example, a lag screw bolt, which is a rod-shaped threaded steel member, can be employed. The joining plate portion 32 extends downward from the end plate portion 31.

The second joining hardware 4 has a fixing plate portion 41 . The fixed plate portion 41 is fixed to the upper flange 26 of the lower beam 2B by welding or the like. The fixed plate part 41 is arranged below the joining plate part 32. The plate surface of the fixed plate part 41 faces the same direction as the plate surface of the joining plate part 32.

The pin joint portion 5 pin-joins the first joint hardware 3 joined to the wooden wall 1 and the second joint hardware 4 fixed to the lower beam 2B. In other words, the wooden wall 1 is rotatably pin-joined to the lower beam 2B via the pin joint 5.

The pin joint 5 includes a splice plate 51, a fixing bolt 52, and a structural pin 55.

The splice plates 51 are arranged on both sides of the joining plate section 32 and the fixed plate section 41. The splice plate 51 is arranged astride the joining plate section 32 and the fixed plate section 41. The plate surface of the splice plate 51 faces the same direction as the plate surface of the joining plate section 32 and the plate surface of the fixed plate section 41.

The fixing bolt 52 is inserted into a bolt hole formed in one splice plate 51, a bolt hole formed in the fixing plate portion 41, and a bolt hole formed in the other splice plate 51, and a nut 53 is fastened. . Thereby, the splice plate 51 is joined to the fixed plate portion 41. The connection between the splice plate 51 and the fixed plate portion 41 is a rigid connection that does not rotate.

The structural pin 55 is inserted into a bolt hole formed in one splice plate 51, a bolt hole formed in the joining plate portion 32, and a bolt hole formed in the other splice plate 51, and a nut 56 is fastened. . Thereby, the splice plate 51 is joined to the joining plate portion 32. The connection between the splice plate 51 and the joining plate portion 32 is a rotatable pin connection.

The slab S is installed on the lower beam 2B. At the location where the pin joint 5 is installed, the slab S is cut out to correspond to the shape of the pin joint 5. The distance L1 between the upper surface Su of the slab S and the lower surfaces 16d and 17d of the wooden wall 1 is, for example, about 145 mm.

As shown in FIG. 1, a connecting hardware 13 is fixed to the lower surface 16d of the core material 16 at the widthwise center of the wooden wall 1. A connecting hardware 23 is fixed to the upper part of the lower beam 2B. The connecting hardware 13 and the connecting hardware 23 are joined with bolts 18 via a splice plate or the like.

Connecting hardware 11 is fixed with bolts 12 at the upper portions of both ends of the wooden wall 1 in the width direction. As the bolt 12, for example, a lag screw bolt, which is a rod-shaped threaded steel member, can be employed. A connecting hardware 13 is fixed at the center of the wooden wall 1 in the width direction.

A connecting hardware 21 is fixed to the lower part of the upper beam 2A at a location corresponding to the connecting hardware 11. A connecting hardware 23 is fixed to the lower part of the upper beam 2A at a location corresponding to the connecting hardware 13. The connecting hardware 11 and the connecting hardware 21 are bolted together via a splice plate or the like. The connecting hardware 13 and the connecting hardware 23 are bolted together via a splice plate or the like.

In the joint structure 100 configured in this way, the first joint hardware 3 provided at the lower part of the wooden wall 1 and the second joint hardware 4 provided at the lower beam 2B are pin-joined at the pin joint portion 5. There is. As a result, the wooden wall 1 and the lower beam 2B are pin-joined. By pin-joining the ends of the wooden wall 1 in the width direction, it functions as a tensile joint. By rigidly joining the widthwise center of the wooden wall 1 with bolts 18, it functions as a shear joint. Therefore, at the ends in the width direction of the wooden wall 1 where tensile stress acts during shear deformation, splitting fracture due to additional bending can be suppressed and high strength can be achieved.

(Modification 1)
Next, Modification 1 will be described mainly using FIG. 3. In the following description of the modified example, the same reference numerals are used for the same or similar members and portions as in the above-described embodiment, and the description thereof will be omitted, and configurations different from the embodiment will be described.

3A and 3B are a side view and a front view, respectively, showing a joint structure of a wooden wall and a frame and a slab according to a first modification of an embodiment of the present invention.
As shown in FIG. 3, in the joint structure 100A according to this modification, the lower surface 17d of the face material 17 of the wooden wall 1 is located below the lower surface 16d of the core material 16. As shown in Figure 3(b),
In front view, the lower end 17a of the face material 17 is arranged to overlap with the upper bolt 18a of the end plate 31, nut 35, and bolt 18 of the first joining hardware 3, and the nut 35 and the upper bolt 18a are exposed. is suppressed.

In front view, the lower end portion 17a of the face material 17 does not overlap with the lower bolt 18b of the structural pin 55 and the bolt 18. The distance L2 between the upper surface Su of the slab S and the lower surface 17d of the face material 17 of the wooden wall 1 is, for example, about 55 mm.

In the joint structure 100A configured in this way, the first joint hardware 3 provided at the lower part of the wooden wall 1 and the second joint hardware 4 provided at the lower beam 2B are pin-joined at the pin joint portion 5. There is. As a result, the wooden wall 1 and the lower beam 2B are pin-joined. By pin-joining the ends of the wooden wall 1 in the width direction, it functions as a tensile joint. By rigidly joining the widthwise center of the wooden wall 1 with bolts 18, it functions as a shear joint. Therefore, at the ends in the width direction of the wooden wall 1 where tensile stress acts during shear deformation, splitting fracture due to additional bending can be suppressed and high strength can be achieved.

Further, the lower surface 17d of the face material 17 of the wooden wall 1 is located below the lower surface 16d of the core material 16. When viewed from the front, the lower end 17a of the face member 17 is arranged to overlap with the end plate portion 31 of the first joining hardware 3, the nut 35, and the upper bolt 18a. Therefore, exposure of the end plate portion 31, nut 35, and upper bolt 18a of the first metal joint 3 is suppressed, and the appearance can be improved.

(Modification 2)
Next, Modification 2 will be explained mainly using FIG. 4.
4A and 4B are a side view and a front view, respectively, showing a joint structure of a wooden wall and a frame and a slab according to a second modification of an embodiment of the present invention. FIG.
As shown in FIG. 4, in the joint structure 100B according to the present modification, the lower surface 17d of the face material 17 of the wooden wall 1 is located below the lower surface 16d of the core material 16, and is located on the upper surface Su of the slab S. are in contact.

As shown in FIG. 4(b), when viewed from the front, a through hole 17b is formed in the lower end portion 17a of the face member 17 at a position corresponding to the lower bolt 18b. The diameter of the through hole 17b is slightly larger than the diameter of the bolt 18b.

In the joint structure 100A configured in this way, the first joint hardware 3 provided at the lower part of the wooden wall 1 and the second joint hardware 4 provided at the lower beam 2B are pin-joined at the pin joint portion 5. There is. As a result, the wooden wall 1 and the lower beam 2B are pin-joined. By pin-joining the ends of the wooden wall 1 in the width direction, it functions as a tensile joint. By rigidly joining the widthwise center of the wooden wall 1 with bolts 18, it functions as a shear joint. Therefore, at the ends in the width direction of the wooden wall 1 where tensile stress acts during shear deformation, splitting fracture due to additional bending can be suppressed and high strength can be achieved.

Further, in a front view, a through hole 17b is formed in the lower end portion 17a of the face member 17 at a position corresponding to the lower bolt 18b. Therefore, the bolt 18b can be fastened through the through hole 17b, resulting in good workability.

Further, the lower surface 17d of the face material 17 is in contact with the upper surface Su of the slab S installed on the lower beam 2B. Therefore, exposure of the first metal fitting 3, the second metal fitting 4, and the pin joint portion 5 is suppressed, and the appearance can be improved.

Note that the assembly procedure shown in the above-described embodiments, the shapes and combinations of each component, etc. are merely examples, and various changes can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in the embodiment shown above, the lower beam 2B is used as an example of the frame to which the wooden wall 1 is joined by the joining structure 100, but the structure is not limited to this. The frame may be of another form or may be made of reinforced concrete.

In the embodiment shown above, the first metal joint 3 and the second metal joint 4 are pin-joined with the structural pin 55 via the splice plate 51, but the invention is not limited to this. The first metal fitting 3 and the second metal fitting 4 may be directly pin-bonded using structural pins 55.

The Sustainable Development Goals (SDGs) are among the 17 international goals adopted at the United Nations Summit in September 2015. The joint structure 100 according to the present embodiment can contribute to achieving, for example, goal "15. Let's protect the richness of the land" among the 17 goals of the SDGs.

1 Wooden wall 2B Lower beam (framework)
3 First joining hardware (first joining part)
4 Second joining hardware (second joining part)
5 Pin joint part 16 Core material 17 Face material 100, 100A, 100B Joint structure (joint structure between wooden wall and frame)
S slab Su top surface

Claims (3)

a first joint provided at the bottom of the widthwise end of the wooden wall;
a second joint provided in the building frame;
A joint structure between a wooden wall and a frame, comprising: a pin joint portion that pin-joins the first joint portion and the second joint portion. The wooden wall is
Core material and
A face material provided on at least one side of the core material,
The first joint portion is provided at the lower end of the core material,
2. The joint structure of a wooden wall and a frame according to claim 1, wherein a lower end of the face material is located below a lower end of the core material. A slab is installed on the framework,
3. The joint structure between a wooden wall and a frame according to claim 2, wherein a lower end of the face material is in contact with an upper surface of the slab.

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