JP3679748B2 - Seismic frame in wooden structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an earthquake resistant frame in a wooden structure.
[0002]
[Prior art]
Generally, in a wooden house, it is necessary to provide an earthquake-resistant wall along two directions in order to ensure the earthquake resistance. However, in wooden houses built on narrow sites in urban areas, the frontage tends to be narrower with respect to depth, so it is difficult to install a seismic wall in the frontage direction from the viewpoint of securing windows and entrances for lighting and ventilation. It is.
[0003]
[Problems to be solved by the invention]
Therefore, a so-called rigid joint frame has been proposed as a structure type that does not require a seismic wall in one direction (for example, the frontage direction). However, in the conventional rigid joint frame in the wooden structure, it is necessary to adopt a very complicated configuration (complex processing, complicated joint parts, etc.) in order to ensure sufficient rigidity at the joint between the column member and the beam member. was there.
[0004]
The present invention has been made in view of the above-described problems, and an object thereof is to provide an earthquake-resistant frame that can ensure sufficient earthquake resistance in the frame in-plane direction based on a simple configuration.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides an earthquake resistant frame in a wooden structure,
A column member;
A pair of beam members attached to the column member so as to sandwich the column member;
A first plate member having a substantially larger width than the column member along the out-of-plane direction of the frame and attached to the outer surface of the column member;
A second plate member having a substantially larger width than the pair of beam members along the out-of-plane direction of the frame and attached to the upper side surfaces of the pair of beam members;
A pair of upper reinforcing members attached to the upper side surfaces of the pair of beam members so as to protrude from the column member in the out-of-plane direction of the frame;
The first plate member is attached to the outer surface of the pair of upper reinforcing members,
The second plate member is provided on the upper side surface of the pair of upper reinforcing members, and provides an earthquake resistant frame.
[0006]
According to a preferred aspect of the present invention, the first plate member further comprises a pair of lower reinforcing members attached to the lower side surfaces of the pair of beam members so as to protrude from the column member in an out-of-plane direction of the frame. Are attached to the outer surfaces of the pair of lower reinforcing members. Moreover, it is preferable that a spacer is disposed adjacent to the column member in the gap between the pair of beam members.
[0007]
According to a preferred aspect of the present invention, the column member and the pair of beam members are connected by a through bolt and a plurality of lug screws arranged radially around the through bolt. In this case, it is preferable that among the plurality of lug screws, the first group of lug screws are screwed in from one beam member side, and the second group of lug screws are screwed in from the other beam member side.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings.
1A and 1B are diagrams schematically illustrating a configuration of an earthquake-resistant frame according to an embodiment of the present invention, in which FIG. 1A is a front view, and FIG. 1B is a side surface along line AA in FIG. (C) is a side view along line BB in (a), and (d) is a top view along line CC in (a).
[0009]
FIG. 2 is a diagram showing in detail the structure of the column / beam joint in FIG. Further, FIG. 3 is a side view taken along line DD in FIG. FIG. 4 is a top view taken along line EE in FIG. In the present embodiment, the present invention is applied to a so-called portal frame.
[0010]
Referring to FIG. 1, a portal frame (seismic frame) according to the present embodiment includes a pair of column members 1 and 2 erected along a vertical direction, an upper end portion of one column member 1, and the other column member 2. And a beam member 3 laid horizontally between the upper end portions of the two.
[0011]
2 to 4, for example, a pair of beam members 3a and 3b made of 212 material of 2 × 4 construction method are pillar members so as to sandwich column member 1 (2) made of 212 material of 2 × 4 construction method, for example. 1 (2). That is, the column member 1 (2) and the pair of beam members 3a and 3b are connected by a through bolt 4 and eight lug screws (large screws) 5a to 5h arranged radially around the through bolt 4. Yes. Here, the through bolt 4 is a fastening means for assembling (building), and the eight lug screws 5a to 5h resist bending at the column / beam joint.
[0012]
The four lug screws 5a to 5d are screwed from the side of the one beam member 3a, and the four lug screws 5a to 5d are screwed from the side of the other beam member 3b. In addition, a rectangular spacer 6 is disposed in the gap between the pair of beam members 3a and 3b so as to be adjacent to the column member 1 (2). As the spacer 6, for example, 212 material of 2 × 4 construction method can be used. The spacer 6 is attached to the pair of beam members 3a and 3b by, for example, a plurality of screws (see FIG. 1).
[0013]
Further, the pair of upper reinforcing members 7a and 7b extending from the column member 1 (2) so as to protrude in the out-of-plane direction of the frame (the direction perpendicular to the paper surface of FIG. 2) is formed by a plurality of nails, for example. The members 3a and 3b are respectively attached to the upper side surfaces. Similarly, a pair of lower reinforcing members 8a and 8b extending from the column member 1 (2) so as to protrude in the out-of-plane direction of the frame are formed on the lower surfaces of the pair of beam members 3a and 3b by, for example, a plurality of nails Each is attached. As the pair of upper reinforcing members 7a and 7b and the pair of lower reinforcing members 8a and 8b, for example, 212 material of 2 × 4 construction method can be used.
[0014]
Moreover, the 1st plate member 9 which consists of a structural plywood, for example is attached to the outer surface of the column member 1 (2). The first plate member 9 has a substantially larger width than the column member 1 (2) along the out-of-plane direction of the frame. For example, the first plate member 9 is formed by a plurality of nails (shown by circles in FIG. 3). It is attached not only to the outer surface of 2) but also to the outer surfaces of the pair of upper reinforcing members 7a and 7b and the outer surfaces of the pair of lower reinforcing members 8a and 8b.
[0015]
Similarly, a second plate member 10 made of, for example, a structural plywood is attached to the upper side surfaces of the pair of beam members 3a and 3b. The second plate member 10 has substantially the same width as the first plate member 9, and is not only with respect to the upper surfaces of the pair of beam members 3a and 3b, for example, by a plurality of nails (shown by circles in FIG. 4). The upper reinforcing members 7a and 7b are also attached to the upper side surfaces.
[0016]
As described above, in the earthquake-resistant frame of the present embodiment, the eight lug screws in which the pair of beam members 3 a and 3 b arranged so as to sandwich the column member 1 (2) are arranged radially around the through bolt 4. By 5a-5h, in other words, it is attached to the column member 1 (2) by screw fastening means arranged two-dimensionally. In addition, the pair of upper reinforcing members 7a and 7b are attached to the upper side surfaces of the pair of beam members 3a and 3b so as to protrude from the column member 1 (2) in the out-of-plane direction of the frame.
[0017]
And the 1st plate member 9 attached to the outer side surface of the pillar member 1 (2) is attached to the outer side surface of a pair of upper side reinforcement members 7a and 7b, and is attached to the upper side surface of a pair of beam members 3a and 3b. The second plate member 10 is attached to the upper side surfaces of the pair of upper reinforcing members 7a and 7b. That is, the first plate member 9 attached to the outer side surface of the column member 1 (2) and the second plate member 10 attached to the upper side surfaces of the pair of beam members 3a and 3b are paired with the pair of upper reinforcing members 7a. And 7b are connected to each other.
[0018]
As a result, in this embodiment, the direct joining structure of the column member 1 (2) and the pair of beam members 3a and 3b via the eight lug screws 5a to 5h, the first plate member 9 and the second plate member 10 and a pair of upper reinforcing members 7a and 7b through the indirect joint structure of the column member 1 (2) and the pair of beam members 3a and 3b, the frame surface based on a simple configuration. Sufficient earthquake resistance can be secured in the inward direction.
[0019]
In the present embodiment, the pair of lower reinforcing members 8a and 8b are attached to the lower surfaces of the pair of beam members 3a and 3b so as to protrude from the column member 1 (2) in the out-of-plane direction of the frame. Yes. And the 1st plate member 9 attached to the outer surface of the pillar member 1 (2) is attached to the outer surface of a pair of lower reinforcement member 8a and 8b. In this way, the column member 1 (2) is connected to the pair of beam members 3a and 3b via the first plate member 9 and the pair of lower reinforcing members 8a and 8b. Can be further improved.
[0020]
In the present embodiment, the spacer 6 is disposed adjacent to the column member 1 (2) in the gap between the pair of beam members 3a and 3b. It is possible to substantially avoid the deformation of the column / beam joint that is likely to occur during the construction of the two lug screws 5a to 5h.
[0021]
As shown in FIGS. 1 and 2, in order to avoid the occurrence of cracks in the fiber direction in the pair of beam members 3a and 3b, any two of the lug screws 5a to 5h are aligned in the horizontal direction. It is preferable to arrange so that it does not. Similarly, as shown in FIG. 1, in order to avoid the occurrence of cracks in the fiber direction in the pair of beam members 3a and 3b and the spacer 6, any two screws (nine in FIG. 1) are used. It is preferable to arrange so that they are not aligned in the horizontal direction.
[0022]
FIG. 5 is a diagram schematically showing an application example of the seismic frame according to the present embodiment to an actual frame. As shown in FIG. 5, the seismic frame of the present embodiment is arranged at a relatively small pitch along the direction outside the frame surface, and the first plate member 9 and the second plate member 10 are shared by a plurality of adjacent frames. By doing so, an actual skeleton can be formed.
[0023]
In this case, since the pitch along the out-of-frame direction is relatively small, the horizontal force to be borne by one seismic frame can be reduced, and consequently the horizontal strength in the in-frame direction of the frame can be increased. . Moreover, the 1st plate member 9 shared by a some adjacent flame | frame comprises an earthquake-resistant wall along the frame surface outer direction.
[0024]
In the above-described embodiment, the present invention is applied to a single-layer portal frame. However, the present invention is not limited to this, and the present invention is applied to a single-layer frame or a multi-layer frame having another appropriate form. It can also be applied.
[0025]
In the above-described embodiment, the 2 × 4 method 212 is used for the column member 1 (2), the pair of beam members 3a and 3b, the spacer 6, the upper reinforcing members 7a and 7b, and the lower reinforcing members 8a and 8b. Although the example using a material is shown, it is not limited to this, The wooden material which has another suitable form can be used. Similarly, although the example which used the structure which consists of a structural plywood with respect to the 1st plate member 9 and the 2nd plate member 10 is shown, it is not limited to this, The wooden material which has another suitable form is shown. Can be used.
[0026]
Furthermore, in the above-described embodiment, the seismic frame is disposed at a relatively small pitch along the out-of-frame direction. However, the pitch is not limited to this, and a required pitch is determined according to the horizontal strength of the seismic frame. It can also be arranged as appropriate.
[0027]
【The invention's effect】
As described above, according to the present invention, it is possible to realize an earthquake resistant frame capable of ensuring sufficient earthquake resistance in the frame in-plane direction based on a simple configuration.
[Brief description of the drawings]
1A and 1B are diagrams schematically showing a configuration of an earthquake-resistant frame according to an embodiment of the present invention, in which FIG. 1A is a front view, and FIG. 1B is a side view taken along line AA in FIG. (C) is a side view along line BB in (a), and (d) is a top view along line CC in (a).
FIG. 2 is a diagram showing in detail the configuration of the column / beam joint in FIG. 1;
FIG. 3 is a side view taken along line DD in FIG.
4 is a top view taken along line EE of FIG. 2. FIG.
FIG. 5 is a diagram schematically showing an application example of the seismic frame according to the present embodiment to an actual frame.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 2 Column member 3a, 3b A pair of beam member 4 Through bolt 5a-5h Lug screw 6 Spacer 7a, 7b Upper reinforcement member 8a, 8b Lower reinforcement member 9 1st plate member 10 2nd plate member

Claims (5)

An earthquake resistant frame in a wooden structure,
A column member;
A pair of beam members attached to the column member so as to sandwich the column member;
A first plate member having a substantially larger width than the column member along the out-of-plane direction of the frame and attached to the outer surface of the column member;
A second plate member having a substantially larger width than the pair of beam members along the out-of-plane direction of the frame and attached to the upper side surfaces of the pair of beam members;
A pair of upper reinforcing members attached to the upper side surfaces of the pair of beam members so as to protrude from the column member in the out-of-plane direction of the frame;
The first plate member is attached to the outer surface of the pair of upper reinforcing members,
The earthquake-resistant frame, wherein the second plate member is attached to upper surfaces of the pair of upper reinforcing members. A pair of lower reinforcing members attached to the lower surfaces of the pair of beam members so as to protrude from the column member in the out-of-plane direction of the frame;
The earthquake-resistant frame according to claim 1, wherein the first plate member is attached to an outer surface of the pair of lower reinforcing members. The earthquake-resistant frame according to claim 1 or 2, wherein a spacer is disposed in the gap between the pair of beam members so as to be adjacent to the column member. The column member and the pair of beam members are connected by a through bolt and a plurality of lug screws arranged radially around the through bolt. Seismic frame as described in The first group of lug screws among the plurality of lug screws are screwed from one beam member side, and the second group of lug screws are screwed from the other beam member side. Earthquake resistant frame.

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