JP3453523B2 - Seismic structure of wooden building - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an earthquake-resistant structure for wooden structures.

[0002]

2. Description of the Related Art A number of proposals have been made in order to improve the vibration resistance of wooden structures against earthquakes, particularly direct earthquakes. However, the conventional vibration-proof structure of a wooden building is basically in the direction of strengthening the connection between the horizontal members (side foundations, eaves girders, trunks) and the column members. It is true that increasing the strength of the connection between the horizontal members and the pillars will increase the vibration resistance, but against shocking forces such as a direct earthquake, the connection metal fittings and their fixing It is difficult to say that the vibration resistance is sufficient because the tools and wood may be damaged and fall off.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to obtain a vibration-proof structure capable of increasing the vibration-proof strength of a wooden building structure more reliably. Another object of the present invention is to improve the seismic strength without processing (without damaging) the wooden building itself.

[0004]

SUMMARY OF THE INVENTION The present invention provides a lower horizontal member installed on a cloth foundation; an upper horizontal member that is parallel to the lower horizontal member; and a space between the lower horizontal member and the upper horizontal member. In a wooden building having a vertical column member that is positioned and connected to both horizontal members,
Force-fitting metal fittings having a rectangular or circular cross section inserted into the upper and lower horizontal members without being processed into the horizontal members; And a vertical pulling rod for connecting the force fitting to the force fitting mounted on the lower horizontal member.

Since the force fitting having a rectangular cross section or a circular cross section can be attached and detached in a direction orthogonal to its longitudinal direction without processing it into a horizontal member, it is possible to bully (process) a wood-based material. There is no problem of strength reduction due to. Further, since the cross section is rectangular or circular, it does not fall off no matter what force is applied between the force fitting and the horizontal member. Further, the vertical pull rod has a meaning of “vertical”, and because it is stretched vertically, it is possible to prevent the horizontal members from being separated from each other and prevent the tenon structure from coming off. The vertical pull rod can be composed of an upward vertical rod and a downward vertical rod connected by a connector. It is practical that the connecting device is composed of, for example, a turnbuckle.

The seismic resistant structure of the present invention can be applied to any one-story or two-story structure. In a building with two or more floors, the upper horizontal members and the vertical column members are provided with multiple layers, so the vertical tensile rods are also stretched between the upper and lower horizontal members of multiple layers. . In this case, the vertical tension rods may be provided in different places for each floor because of the openings and the like, but it is preferable that the vertical tension rods are provided between the lower horizontal member and the plurality of upper horizontal members, that is, the entire building. It is better to install them in a straight line. Of course, the number of vertical pull rods may be determined according to the structure, and there is no limitation.

If it is a construction problem to pass the force fitting having a rectangular cross section or a circular cross section through the upper horizontal member in front of the wooden structure, opening and closing so that it can be detached from the direction orthogonal to the longitudinal direction of the horizontal member. It can be possible.

A cushion material may be interposed between the upper and lower surfaces of the upper and lower horizontal members and the force fitting to absorb the difference in thermal expansion between the wood-based material and the vertical tension rod. The earthquake-resistant structure of the present invention includes a horizontal member at the lower part and an upper part, and a column member.
It is effective for buildings that are connected by a tenon structure that can be attached and removed vertically.

[0009]

1 and 2 are embodiments in which the present invention is applied to a three-story wooden building. A lower horizontal member (side base) 12 is placed and fixed on the cloth foundation 11, and vertical column members 13 and 14 are erected on the lower horizontal member 12. In the illustrated example, the vertical column members 13 at the corners are so-called through columns, and the other vertical column members 14 are inserted and fixed between the lower horizontal member 12 and the upper horizontal member 15. Lower horizontal material 12
Since the upper horizontal member 15 which is parallel to the above is a three-story building, there are three layers, and the vertical column members 14 are similarly inserted and fixed between the respective upper horizontal members 15. Vertical pillar material 14 and lower horizontal material 12
As shown in FIG. 3, (and the upper horizontal member 15) are connected by a tenon structure 16 that can be vertically attached and detached. As shown in FIG. 2, the cloth foundation 11 and the lower horizontal member 12 are joined by a fixed anchor 18.

The above is an example of the structure of an ordinary wooden building. In such a structure, upper and lower horizontal members 15, 1
A rectangular force fitting 21A having a rectangular cross section is inserted into each of the two 2 from the end of the horizontal member in the longitudinal direction. The horizontal material does not require drilling or any other processing. To make a hole is a technical term to bully a tree, which is not preferable in terms of strength. The upper and lower force fittings 21A are connected by a vertical pull rod 20. That is, the upper and lower end portions of the vertical pull rod 20 and the force fitting metal fitting 21A are connected to the welded portion 23.
It is welded in. Further, between the front and back surfaces of the lower horizontal member 12 and the upper horizontal member 15 and the force fitting 21A, a cushioning material such as rubber is used to absorb the difference in thermal expansion between the vertical tensile rod 20 and the vertical column member 14. 24 is inserted.

As described above, when the force fittings 21A inserted into the upper and lower lower horizontal members 12 and the upper horizontal member 15 are connected by the vertical pull rod 20, the lower horizontal member 12 and the upper horizontal member 12 are connected by an external force such as an earthquake. Frame material 15 or upper horizontal material 1
When a force is applied to separate the five members from each other, the vertical pull rod 20 resists the force and prevents the separation. Therefore, the rectangular structure that forms the basis of the building does not collapse. In other words, the vertical tenon structure 16 between the vertical column member 14 and the lower horizontal member 12 (upper horizontal member 15) does not come off.

The conventional structure has a vertical column member 14 and a lower horizontal member 12.
Although various metal fittings are used to increase the bonding strength of the (upper horizontal member 15), such metal fittings are easily disengaged by an impact force, and the vertical column member 14 and the lower horizontal member 12 (upper member) are used. The horizontal member 15) itself is also easily broken from the fixed part of the metal fitting. When destroyed, the tenon structure 16 is disengaged and the rectangular structure is destroyed, resulting in the worst case collapse of the building. On the other hand, the vertical tensile rod 20 according to the present embodiment prevents the tenon structure 16 between the vertical column member 14 and the lower horizontal member 12 (upper horizontal member 15) from coming off, and the vertical column member 14 and the lower horizontal member 15 are prevented. Frame 1
Since the separation of 2 (the upper horizontal member 15) is prevented, it is possible to more reliably prevent the rectangular structure from being broken.

FIG. 4 shows an embodiment in which the vertical pull rod 20 is divided into male and female threads which are connected to each other with a turnbuckle 26. That is, in the force fittings 21A of each upper horizontal member 15 except the uppermost horizontal member 15,
The upward vertical rods 20U and the downward vertical rods 20D extending in the same axis are welded, and only the downward vertical rods 20D are welded to the force fittings 21A of the uppermost horizontal member 15 at the uppermost portion, and the upper and lower adjacent upward vertical rods 20U are welded. The downward vertical rod 20D is connected with a turnbuckle 26.

According to this embodiment, a force fitting 21A is provided for each floor (lower horizontal member 12 and upper horizontal member 15), and the upward vertical rod 20U and the downward vertical rod 20D are connected by a turnbuckle 26. Since it can be done, construction becomes easy.

The vertical pull rod 20 does not necessarily have to extend straight to each floor. As shown in FIG. 5, it is possible to change the installation location of the vertical pull rod 20 for each floor. Such a structure can be adopted when the position of the vertical pull rod 20 is restricted by the positions of the openings (windows and doors) 18 provided in the building.

FIG. 6 shows a circular force fitting 21B having a circular cross section. Inserted from the longitudinal end of the upper horizontal member 15
The circular force-applying metal member 21B can rotate relative to the upper horizontal member 15. Therefore, the advantage of this embodiment is that the horizontal member 15 (12) and the circular force fitting 21B can rotate relative to each other in the case of a direct earthquake in which it is unknown what kind of force acts. The circular force fitting 21B does not exert a torsional shearing force on the upper horizontal member 15.

In the embodiment shown in FIGS. 7 and 8, the rectangular force fitting 21A shown in FIG. 3 and the circular force fitting 21B shown in FIG. 6 can be opened and closed by an opening / closing hinge 27 and can be connected by a connecting flange 28. The force fitting 21A 'and the opening / closing circular force fitting 21B' are shown. The opening / closing rectangular force fitting 21A 'is an open / close circular force fitting 21B' that is formed by the upper horizontal member 15
Moreover, it can be attached and detached from the direction orthogonal to the longitudinal direction, and the workability is improved. The opening / closing hinge 27 and the connecting flange 28 are given sufficient strength.

[0018]

As described above, according to the seismic resistant structure of the present invention, the seismic resistance of a wooden building can be dramatically improved without being bullied.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a seismic resistant structure for a wooden building according to the present invention.

FIG. 2 is a side view showing an example of a connection between a cloth foundation, a lower cross member and a vertical tension rod.

FIG. 3 is a sectional view of an upper horizontal member and a force fitting.

FIG. 4 is a front view showing another embodiment of the seismic resistant structure for a wooden building according to the present invention.

FIG. 5 is a front view showing still another embodiment of the seismic resistant structure for a wooden building according to the present invention.

FIG. 6 is a cross-sectional view showing another example of the force fitting which is coupled to the upper horizontal member.

FIG. 7 is a cross-sectional view showing another example of the force fitting which is coupled to the upper horizontal member.

FIG. 8 is a cross-sectional view showing another example of the force fitting which is coupled to the upper horizontal member.

[Explanation of symbols]

11 cloth foundation 12 Lower horizontal material 13 14 Column material 15 Upper horizontal material 16 Mortise structure 20 Vertical tension rod 20U upward vertical rod 20D downward vertical rod 21A rectangular force fitting 21B circular force fitting 21A 'Opening and closing rectangular force fitting 21B 'Opening and closing circular force fitting 23 Weld 24 Cushion material 26 turnbuckles 27 Opening and closing hinge 28 Connection flange

Claims (6)

(57) [Claims] 1. A lower horizontal member installed on a cloth foundation; an upper horizontal member that is parallel to the lower horizontal member; and both positioned between the lower horizontal member and the upper horizontal member. In a wooden building having a vertical column member connected to a horizontal member, the upper and lower horizontal members are inserted into the upper and lower horizontal members from their longitudinal ends without processing. sectional rectangular or circular force application fittings that; wood to that having said; and force application fitting this is mounted on the upper horizontal member, a vertical tensile rod connecting the force application bracket mounted to the lower horizontal member Earthquake-resistant structure of system building. 2. The seismic resistant structure for a wooden building according to claim 1, wherein the vertical pull rod comprises an upward vertical rod and a downward vertical rod connected by a connecting tool. 3. The vibration resistant structure for a wooden building according to claim 2, wherein the connecting tool is a turnbuckle. 4. The vibration-proof structure for a wooden building according to claim 1, wherein the wooden building has two or more floors, and the upper horizontal member and the vertical pillar member have a plurality of layers. Vibration-resistant structure of wooden structures equipped with. 5. The vibration-proof structure for a wooden building according to claim 1, wherein the force fitting having a rectangular cross section or a circular cross section is detachable from a direction orthogonal to the longitudinal direction of the horizontal member. Vibration resistant structure of wooden structures that can be opened and closed. 6. The vibration-resistant structure for a wooden building according to claim 1, wherein a cushioning material is interposed between the upper and lower surfaces of the upper horizontal member and the force fitting. Vibration-resistant structure of building.