JP7563676B2 - Steel structural members and wooden boards connected together - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act applies Date of publication: March 1, 2020 URL of publication: https://www. howtec. or. jp/ https://www. howtec. or. jp/publics/index/102/ https://www. howtec. or. jp/files/libs/3269/202004211415479466. pdf

The present invention relates to walls of steel frame structures, and in particular to a joint structure for using wooden walls in the walls of steel frame structures.

One method for providing wooden walls to the walls of a steel-frame structure is disclosed in JP 2019-65685 A (Patent Document 1), a publication entitled "Building." This conventional method involves fitting an earthquake-resistant wall (18) made of laminated and bonded wooden boards with their grain direction perpendicular to each other into a framework (16) of a building (10) that is made of steel H-shaped steel columns (12) and beams (14), and then connecting and fixing one flange of the H-shaped steel of the beam (14) to both ends of the opposing sides of the earthquake-resistant wall (18) with tension bolts (40), and connecting the beam (14) to the middle part of the side of the earthquake-resistant wall (18) with bolts (34).

This conventional method requires fitting an earthquake-resistant wall (18) into the inside of an opening defined by a pair of opposing columns (12) and a pair of beams (14), and therefore requires connecting work for each opening. In addition, the earthquake-resistant wall (18) to be fitted into each opening must have insertion holes (38) for attaching the tension bolts (40) formed in advance, and if there was any misalignment in the hole positions, on-site correction work was extremely cumbersome.

JP 2019-65685 A

The problem that this invention aims to solve is to provide a joint structure between steel structural members and wooden boards that allows wooden earthquake-resistant walls to be easily installed on the walls of steel frame structures.

The connection structure between steel structural members and wooden boards according to the present invention includes a wooden board having a specified width, a steel structural member joined to the surface of the wooden board and extending in the width direction of the wooden board, and a fastening member for fastening the steel structural member to the wooden board. There are no particular limitations on the wooden board, but any board material having the required width and length can be used, including sawn timber, laminated lumber, plywood, particle board, laminated veneer lumber, CLT boards, etc.

The connection structure according to the present invention can also be configured so that the steel structural material includes a pair of contact surfaces that are spaced apart from each other in the length direction of the wooden board and are in contact with the wooden board and are fixed by a fixing member, and a structural part that is disposed between the pair of contact surfaces. The steel structural material can also be configured so that it further includes connecting parts that extend from the opposing sides of the pair of contact surfaces in a direction that intersects with the surface direction of the contact surfaces, and the structural part is disposed between the pair of connecting parts. Furthermore, the contact surfaces and connecting parts of the steel structural material can be formed from L-shaped steel members, and the structural part can be formed from H-shaped, U-shaped, or R-shaped steel members.

The connection structure according to the present invention can also be configured so that the steel structural material includes a pair of contact surfaces that are spaced apart from each other in the length direction of the wooden board and contact the wooden board, a joint that connects the pair of contact surfaces, and a structural part that is disposed on the joint. Furthermore, the contact surfaces and joints of the steel structural material can be formed from flat steel members, and the structural part can be formed from H-shaped steel members, U-shaped steel members, or R-shaped steel members.

Furthermore, in the connection structure according to the present invention, it is preferable that the contact surface is formed so that the length in the longitudinal direction of the wooden board at both ends in the width direction of the wooden board is longer than the length between the ends, and it is also preferable that the steel structural members are provided on both sides of the wooden board in a mutually opposing positional relationship.

The connection structure of the present invention is a structure in which steel structural members that form part of a steel frame structure are fixed to the surface of a wooden board by a fixing member, so that the steel structural members can be fixed in a position where they are in contact with the surface of the wooden board, which simplifies on-site positioning work and eliminates the need for pre-processing such as drilling holes as in the conventional technology described above, thereby achieving shortened work hours and reduced costs.

In addition, by fastening the wooden boards to the structural part via a pair of contact surfaces, the joint becomes a rigid-frame joint, which is capable of resisting horizontal forces such as earthquakes and wind. The wooden boards can be securely attached to the structural parts that form the beams and columns of a steel frame structure, thereby improving earthquake resistance. Furthermore, by sandwiching the structural part between the joints that rise from the contact surfaces and joining them, the connection between the contact surfaces and the structural part is made stronger, and the connection between the structural part and the wooden board can be made stronger against forces perpendicular to the surface of the wooden board and forces that twist the wooden board. In this embodiment, the contact surface and the joint can be made of a steel member having an L-shaped cross section (hereinafter referred to as an "L-shaped steel member"), so general-purpose shaped steel can be used. Similarly, the structural part can also be made of a steel member having an H-shaped cross section (hereinafter referred to as an "H-shaped steel member"), a steel member having a U-shaped cross section (hereinafter referred to as a "U-shaped steel member"), or a steel member having a R-shaped cross section (hereinafter referred to as a "R-shaped steel member"), so general-purpose shaped steel can be used. However, the present invention is not limited to using shaped steel for these steel members, and steel plates may be formed into steel members having the desired cross section by bending, welding, bolting, or other means.

In addition, by arranging the structural part on a joint that connects a pair of contact surfaces as a means for fastening the structural part to the wooden board, the contact surfaces and the joint can be formed from a single flat steel plate, making manufacturing costs cheaper.

Furthermore, by making the length of the contact surface at both ends of the width of the wooden board longer than the length between the ends, the bonding strength at both ends of the wooden board can be increased, thereby further improving its function as a seismic wall. In addition, by fastening steel structural members to both sides of the wooden board, not only can a stronger connection be achieved, but the steel structural members hold the wooden board in place during the fastening process, so that accidents such as the wooden board falling out during the fastening process can be reliably prevented.

FIG. 1 is an elevational view showing a connection structure according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA of FIG. FIG. 3 is a cross-sectional view taken along line BB of FIG. FIG. 4 is a cross-sectional view similar to FIG. 2, showing a connection structure according to a second embodiment of the present invention. FIG. 5 is a cross-sectional view similar to FIG. 2, showing a connection structure according to a third embodiment of the present invention. FIG. 6 is a cross-sectional view similar to FIG. 2, showing a connection structure according to a fourth embodiment of the present invention. FIG. 7 is a diagram showing a modification of the connection structure shown in FIG.

The following describes an embodiment of the present invention with reference to the drawings. In the drawings, parts having similar functions are designated by similar reference symbols.

As shown in FIG. 1, the connecting structure according to the first embodiment of the present invention is composed of a wooden board 1 having a predetermined width W, a steel structural member 2 that is joined to the surface of the wooden board 1 and extends in the width direction of the wooden board 1, and a fastening member 3 that fastens the steel structural member 2 to the wooden board 1.

The wooden board 1 is preferably made of a material that can give the appearance of wood, and is made into a rectangular board shape using, for example, sawn timber, laminated timber, plywood, particle board, laminated veneer lumber, CLT boards, etc.

As shown in more detail in Figures 2 and 3, the steel structural material 2 is composed of a pair of flat contact surfaces 20, 20 that are spaced apart from each other in the longitudinal direction of the wooden board 1 and are fixed to the wooden board 1 in contact with the wooden board 1, and a structural part 21 that is provided between the pair of contact surfaces 20, 20. The contact surfaces 20 and the structural part 21 are connected by a connecting means such as welding, and the steel structural material 2 is fixed to the wooden board 1 by fixing each contact surface 20 to the wooden board 1 using woodworking fixing members 3 such as screws or nails.

The structural part 21 is a member that constitutes the beams and columns of a steel structure, but any shape is applicable as long as it can be connected to the contact part 20, and L-shaped steel members, H-shaped steel members, U-shaped steel members, R-shaped steel members, etc. can be used (H-shaped steel members in the illustrated case).

In order to further improve earthquake resistance against horizontal forces, the contact surface 20 is formed so that the length in the lengthwise direction of the wooden board 1 at both widthwise ends of the wooden board 1, which bears a large bending moment caused by horizontal forces in the in-plane direction of the wooden board 1, is longer than the length between the widthwise ends. In order to further strengthen this earthquake resistance, reinforcing ribs 22 are provided between the contact surface 20 at both widthwise ends and the structural part 21, or between the edges that form the structural part 21 (for example, the flanges and webs of the H-shaped steel), to prevent local buckling, bending deformation, and torsional deformation of the steel structural material 2. In the above explanation, the contact surface 20 at both ends and the contact surface 20 at the middle part are illustrated and explained as separate bodies, but it is easy to understand that by making both from a single flat steel plate, the wooden board 1 can more strongly resist bending in the in-plane direction and torsion in the out-of-plane direction.

Figure 4 shows a connection structure according to a second embodiment of the present invention, which is configured similarly to the first embodiment, except that a pair of contact surfaces 20, 20 are connected by a connecting portion 23, and a structural portion 21 is fixed onto the connecting portion 23. In the following, to avoid redundancy, only the differences between the embodiments will be described.

The pair of contact surfaces 20, 20 and the connecting portion 23 are preferably formed from a single flat steel plate, which allows the pair of contact surfaces 20, 20 to be easily and reliably positioned at a predetermined distance, and also allows the joint with the structural portion 21 to be larger, allowing the structural portion 21 to be connected more firmly.

Figures 5 and 6 show a connection structure according to a third embodiment of the present invention, which is configured in the same manner as in the first embodiment, except that the connecting parts 23 extend from the opposing sides of a pair of contact parts 20, 20 in a direction intersecting the surface direction of the contact parts 20 (in the illustrated case, in a direction perpendicular to the surface direction), and the structural part 21 is fixed between the connecting parts 23, 23.

It is preferable that the corresponding pair of contact surfaces 20 and connecting parts 23 are formed integrally, and stronger contact surfaces 20 and connecting parts 23 can be produced more inexpensively by using general-purpose angle iron. Also, fastening the connecting parts to the structure with high-strength bolts or the like makes on-site work easier. It is easy to see how the earthquake resistance against the horizontal forces mentioned above can be improved by using uneven angle iron for the contact surfaces 20 and connecting parts 23 at both ends of the wooden board 1 (see Figure 5) and equal angle iron for the contact surfaces 20 and connecting parts 23 in the middle (see Figure 6).

Figure 6 shows a connection structure according to the fourth embodiment of the present invention, which is configured in the same way as the previous embodiment, except that the above-mentioned steel structural members 2 (in the illustrated case, the steel structural members of the third embodiment) are provided on both sides of the wooden board 1 in a mutually opposing positional relationship.

By fastening the steel structural members 2 to both sides of the wooden board 1, the bending moment generated in the in-plane direction of the wooden board 1 by horizontal force can be nearly doubled compared to when the steel structural member 2 is fastened to one side, greatly improving earthquake resistance. In addition, not only can the steel structural member 2 be prevented from coming off the wooden board 1 due to torsional stress applied in a direction perpendicular to the plane of the wooden board 1, but the steel structural member 2 can hold the wooden board 1 in place until the steel structural member 2 (more specifically, the contact surface 20) is fastened to the wooden board 1 by the fastening member 3, so that the wooden board 1 can be reliably prevented from falling off or becoming displaced during the fastening process.

Here, the steel structural members 2 fixed to both sides of the wooden board 1 do not necessarily have to have the same configuration. For example, as shown in FIG. 7, a steel structural member 2 having a contact surface 20 with a long length at both widthwise ends is applied to one side of the wooden board 1, while a steel structural member 2 having a contact surface 20 with an equal length is applied to the other side, which is the outer surface, to create a wall surface that combines the strength with the softness of a wooden wall.

1 Wooden board material 2 Steel structural material 20 Contact surface part 21 Structural part 22 Reinforcement rib 23 Joint part 3 Fixing member W Width (of wood board material)

Claims (7)

A wooden board having a predetermined width;
a steel structural member joined to a surface of the wooden board and extending in a width direction of the wooden board;
and a fastening member for fastening the steel structural material to the wooden board material ,
The steel structural material includes a pair of contact surfaces that are spaced apart from each other in the longitudinal direction of the wooden board and are fixed to the wooden board in contact with the wooden board, and a structural part that is disposed between the pair of contact surfaces,
The length of the contact surface in the length direction of the wooden board at both ends in the width direction of the wooden board is longer than the length between the both ends.
A connected structure of steel structural members and wooden boards. The connection structure according to claim 1, wherein the steel structural member further includes connecting portions each extending from a pair of mutually opposing side portions of the contact surfaces in a direction intersecting with the surface direction of the contact surfaces, and the structural portion is disposed between the pair of connecting portions. 3. The connection structure according to claim 2 , wherein the contact surfaces and joints of the steel structural members are formed by L-shaped steel members, and the structural members are formed by H-shaped steel members, U-shaped steel members or L-shaped steel members. A wooden board having a predetermined width;
a steel structural member joined to a surface of the wooden board and extending in a width direction of the wooden board;
A fastening member for fastening the steel structural member to the wooden board;
Including,
The steel structural material includes a pair of contact surfaces spaced apart from each other in the longitudinal direction of the wooden board and contacting the wooden board, a joint portion connecting the pair of contact surfaces, and a structural portion disposed on the joint portion.
A connected structure of steel structural members and wooden boards . 5. The connection structure according to claim 4 , wherein the contact surfaces and joints of the steel structural members are formed by flat steel members, and the structural members are formed by H-shaped steel members, U-shaped steel members or L-shaped steel members. 6. The connecting structure according to claim 4 , wherein the length of the contact surface in the longitudinal direction of the wooden board at both widthwise ends of the wooden board is longer than the length between the both ends. The connecting structure according to any one of claims 1 to 6 , wherein the steel structural members are provided on both sides of the wooden board in a mutually opposing positional relationship.

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