JP3221088U - Bearing wall - Google Patents

Abstract

An object of the present invention is, in a bearing wall having a longitudinal member and a wall surface member, to reduce the number of joined portions by optimizing the arrangement of the joint portion between the longitudinal member and the wall member.
A load-bearing wall is joined to a pair of vertical members (longitudinal frame members 26) extending in the vertical direction and a pair of vertical members, and an opening 54 provided with an annular rib at an edge is spaced in the vertical direction And a joint portion 60 for joining the vertical member and the wall member in the vertical direction at intervals, and the joint portion is an opening portion than the side portion between the opening portions. Densely placed on the side of the
[Selected figure] Figure 3

Description

  The present invention relates to a bearing wall.

  Patent Document 1 discloses a load resistance including a pair of longitudinal members joined to upper and lower horizontal members of an object and a wall surface member joined to the pair of longitudinal members and having a plurality of burring holes formed in one row in the upper and lower rows. A wall is disclosed. In this load-bearing wall, the longitudinal members and the wall members are joined by drill screws screwed at substantially constant intervals in the vertical direction.

Patent No. 5805893

  By the way, it has been considered that the wall material of the bearing wall behaves almost as a rigid body in the initial stage of shear deformation. That is, it has been considered that the shear force is uniformly transmitted to the joint between the vertical member and the wall member (joint by the drill screw). Therefore, in the bearing wall, joints between the longitudinal members and the wall members are provided at substantially constant intervals. However, in the market, it is desirable to reduce the number of joints by optimizing the arrangement of joints between vertical members and wall members.

  In view of the above facts, the present invention aims to reduce the number of joints by optimizing the arrangement of joints between the uprights and the wall members in a load-bearing wall having the longitudinal members and the wall members. .

  A bearing wall according to a first aspect of the present invention is joined to a pair of vertical members extending in the vertical direction and a pair of the vertical members, and an opening provided with an annular rib at an edge portion is spaced in the vertical direction And a joint portion for joining the longitudinal member and the wall member in the vertical direction with a space between them, and the joint portion is formed by the joint portion, which is closer to the side surface than the opening portion. It is densely arranged on the side of the opening.

  During shear deformation of the load-bearing wall, it acts on the joint located on the side of the opening rather than the shear force acting on the joint located on the side between the openings among the joints of the longitudinal member and the wall material Shear force is large. For this reason, in the bearing wall according to the first aspect of the present invention, the joint between the longitudinal member and the wall material is densely arranged on the side of the opening than on the side between the openings. Thereby, the bearing wall according to claim 1 is, for example, the arrangement of the joint between the longitudinal member and the wall member compared to the configuration (conventional structure) in which the joint between the wall member and the longitudinal member is provided at a constant interval. Is optimized and the number of joints can be reduced.

  The bearing wall according to a second aspect of the present invention is the bearing wall according to the first aspect, wherein the disposition interval of the joint portions located laterally between the openings is located lateral to the openings. It is twice or more the arrangement interval of the junctions.

  In the bearing wall according to claim 2, since the arrangement interval of the joints located laterally between the openings is twice or more the arrangement interval of the joints situated laterally of the openings, for example, 2 The number of joints can be reduced as compared to the less than double configuration.

  The bearing wall according to claim 3 of the present invention is the bearing wall according to claim 1 or claim 2, wherein the opening is circular.

  In the load-bearing wall according to claim 3, since the opening of the wall surface material is circular, stress concentration is relaxed compared to, for example, a configuration in which the opening has a polygonal shape, and rigidity and proof stress against shear deformation are obtained. improves.

  The bearing wall according to claim 4 of the present invention is the bearing wall according to any one of claims 1 to 3, wherein the bearing wall passes through the center of the joint portion adjacent to the vertical direction of one of the longitudinal members. 1) Adjacent to the other vertical member in the vertical direction from a first intersection point of a center line and a first horizontal line extending horizontally through the center of one of the openings adjacent to the vertical direction Extending toward a second intersection point of a second center line passing through the center of the joint and a second horizontal line horizontally extending through the center of the other of the openings adjacent in the vertical direction The straight line is inclined in the range of 30 degrees to 60 degrees with respect to the vertical direction.

  In the bearing wall according to claim 4, the centers of the openings adjacent in the vertical direction such that the straight line extending from the first intersection to the second intersection is inclined in the range of 30 degrees to 60 degrees with respect to the vertical direction. The distance between them is set. Thereby, in the above-mentioned bearing wall, the arrangement interval of an opening is rationalized.

  The bearing wall according to the present invention has an excellent effect that the arrangement of the joint portion between the longitudinal member and the wall surface member is optimized and the number of joint portions can be reduced.

It is a front view of the bearing wall of this embodiment. It is a front view of the frame material of the bearing wall shown by FIG. It is the enlarged view to which the part to which it points by arrow 3X of FIG. 1 was expanded. It is an enlarged view of the part corresponding to FIG. 3 which shows the magnitude | size of the shear force which acts on each junction which joins the frame material and wall surface material of a load-bearing wall shown in FIG. 1 with the length of the arrow. It is sectional drawing of the bearing wall cut | disconnected along 6X-6 X line of FIG. It is sectional drawing of the bearing wall cut | disconnected along the 7X-7 X line of FIG. It is a front view of the bearing wall of a comparative example. It is a distribution map which shows distribution of the shear force which acts on each joining part which joins the frame material and wall surface material of a load-bearing wall shown in FIG. 7 (the interlayer deformation angle of the load-bearing wall 1/10000). It is a distribution map which shows distribution of the shear force which acts on each connection part which joins the frame material and wall surface material of a load-bearing wall shown in FIG. 7 (interlayer deformation angle 1/1000 o'clock of load-bearing wall). It is a distribution map which shows distribution of the shear force which acts on each junction part which joins the frame material and wall surface material of a load-bearing wall shown in FIG. 7 (the interlayer deformation angle of the load-bearing wall 1/300). It is an enlarged view of the part corresponding to FIG. 3 of the bearing wall of other this embodiment. It is an enlarged view of the part corresponding to FIG. 3 of the bearing wall of other this embodiment. It is a front view of the bearing wall of other this embodiment.

  A bearing wall according to an embodiment of the present invention will be described with reference to FIGS. In addition, arrow U shown in the drawing indicates the upper direction of the building to which the bearing wall of the present embodiment is applied. Moreover, the arrow W shown in the drawing indicates the width direction of the bearing wall. In the present embodiment, the width direction of the bearing wall and the horizontal direction of the building coincide with each other.

  As shown in FIG. 1, the bearing wall 20 of the present embodiment includes a frame member 22, a wall member 50, and a joint portion 60.

  As shown in FIG. 1 and FIG. 2, the frame member 22 is formed in a rectangular shape. The frame members 22 are arranged at intervals in the horizontal direction, and horizontally extend to connect the upper ends of the vertical frame members 24, 26, 28 extending in the vertical direction and the vertical frame members 24, 26, 28 in the horizontal direction. 30 and a horizontal frame member 32 horizontally connecting the lower ends of the vertical frame members 24, 26, 28.

  The vertical frame members 24, 26, 28 of this embodiment are an example of the vertical members in the present invention.

(Vertical frame material 24)
As shown in FIG. 2, the vertical frame member 24 forms a portion on one side (left side in FIGS. 2 and 5) of the frame member 22 in the width direction (arrow W direction in the drawing). In the present embodiment, the width direction of the frame member 22 and the width direction of the bearing wall 20 coincide with each other.

  As shown in FIGS. 5 and 6, the vertical frame member 24 forms a square steel pipe 34 forming an outer frame portion on the outer side in the width direction and an inner frame portion on the inner side in the width direction. In other words, the cross section in which the other width direction side (the right side in FIGS. 2 and 5) of the frame member 22 is opened has a C-shaped section steel 36.

  The square steel pipe 34 has a square cross section, and two rectangular steel pipes 34 are arranged side by side in the thickness direction of the frame member 22 (in the direction of the arrow T in the drawing). These square steel pipes 34 are joined by welding.

  The shaped steel 36 is a lip grooved steel, and the outer surface of the web portion 36A is joined to the inner surface of the frame of the square steel pipe 34 (the inner surface of the frame member 22). Specifically, the shaped steel 36 is joined to two square steel pipes 34 using drill screws 38 respectively. In addition, this invention is not limited to the said structure, For example, you may join the shaped steel 36 and the square steel pipe 34 using other methods, such as welding. Further, a reinforcing member 40 having a C-shaped cross section is joined to the inner surface of the shaped steel 36. The reinforcing member 40 is a grooved steel, and the outer surface of the web portion 40A and the outer surface of both flange portions 40B are respectively joined to the inner surface of the web portion 36A of the shaped steel 36 and the inner surface of both flange portions 36B. In addition, the joining method of the section steel 36 and the reinforcement member 40 is not specifically limited. For example, the shaped steel 36 and the reinforcing member 40 may be joined by welding.

(Vertical frame material 26)
As shown in FIG. 2, the vertical frame material 26 is disposed between the vertical frame material 24 and the vertical frame material 28, and forms a portion located at the widthwise center of the frame material 22.

  As shown in FIGS. 5 and 6, the vertical frame member 26 is formed of a section steel 42 having a C-shaped cross section with the vertical frame member 28 side (in other words, the other side in the width direction of the frame member 22) opened. And.

(Vertical frame material 28)
As shown in FIG. 2, the vertical frame member 28 forms a portion on the other side (the right side in FIGS. 2 and 5) of the frame member 22 in the width direction.

  As shown in FIGS. 5 and 6, the vertical frame member 28 is configured to be symmetrical to the vertical frame member 24 with the vertical frame member 26 interposed therebetween. Specifically, the vertical frame member 28 forms a rectangular steel pipe 34 forming an outer frame portion and an inner frame portion, and the vertical frame member 26 side (in other words, one side of the frame member 22 in the width direction (FIG. 2 and FIG. In FIG. 5, the left side of FIG. 5) is provided with an open section steel 36 and a reinforcing member 40 for reinforcing the section steel 36.

  As shown in FIG. 2, the horizontal frame member 30 is formed of a square steel pipe having a rectangular cross section. The upper end of each of the vertical frame members 24, 26, 28 is joined to the horizontal frame member 30 by a fastener such as a screw or a bolt or welding.

  As shown in FIG. 2, the horizontal frame member 32 is formed of a square steel pipe having a rectangular cross section, similarly to the horizontal frame member 30. The lower end of each of the vertical frame members 24, 26, 28 is joined to the horizontal frame member 30 by a fastener such as a screw or a bolt or welding.

  As shown in FIG. 2, the frame member 22 includes stiffening members 44 and 46 for reinforcing the rigidity of the horizontal frame member 30 and the horizontal frame member 32 in relation to relative displacement in the horizontal direction. The stiffening member 44 is disposed between the vertical frame member 24 and the vertical frame member 26 and at a substantially central portion in the vertical direction. Further, one end of the stiffening member 44 is joined to the vertical frame member 24 by a drill screw 48 and the other end is joined to the vertical frame member 26 by a drill screw 48. On the other hand, the stiffening member 46 is disposed between the vertical frame member 24 and the vertical frame member 26 and at a substantially central portion in the vertical direction. Further, one end of the stiffening member 46 is joined to the vertical frame member 26 with the other end of the stiffening member 44 by a drill screw 48, and the other end is joined to the vertical frame member 28 by a drill screw 48. When the rigidity of the frame member 22 is secured, the stiffening members 44 and 46 may be omitted.

(Wall material 50)
As shown in FIG. 1, the wall surface material 50 is a steel plate formed in a rectangular shape, and is joined to the frame material 22. In the load-bearing wall 20 of the present embodiment, two wall members 50 are used, one wall member 50 is joined to the vertical frame member 24 and the vertical frame member 26, and the other wall members 50 are vertical to the vertical frame member 26. It is joined to the frame member 28. Specifically, both end portions in the width direction of one wall surface member 50 are joined to the vertical frame members 24 and the vertical frame members 26 which are a pair of vertical members using a plurality of drill screws 52 respectively. Further, both end portions in the width direction of the other wall surface members 50 are joined to the vertical frame members 26 and the vertical frame members 28 which are a pair of vertical members, using a plurality of drill screws 52 respectively. In addition, although the wall surface material 50 of 2 sheets is the same dimension, this invention is not limited to this structure.

  The portion where the drill screw 52 is screwed in for joining the one wall surface material 50 to the vertical frame material 24 and the vertical frame material 26, and the other wall surface material 50 and the vertical frame material 26 and the vertical frame material 28 The portion where the drill screw 52 is screwed in for jointing of

Further, as shown in FIG. 2, a plurality of (seven in the present embodiment) openings 54 are formed in the wall material 50 at intervals in the vertical direction. The opening 54 is circular. Further, at the edge of the opening 54, an annular rib 56 integrally formed with the wall surface material 50 is formed. Further, in the present embodiment, the opening 54 and the annular rib 56 are formed by performing a burring process on the steel plate to be the wall surface material 50. In addition, this invention is not limited to the said structure, For example, an opening is formed in the steel plate used as the wall surface material 50, an annular member is joined to the edge of this opening, and the opening 54 and the annular rib 56 are formed. It is also good.
Further, in the present embodiment, seven openings 54 are formed in one line in the vertical direction. The openings 54 arranged in a line are offset with respect to the center of the wall surface material 50 in the width direction (that is, close to one side or the other side in the width direction).

  Further, the upper end portion of one wall surface material 50 and the upper end portion of the other wall surface material 50 are joined to the horizontal frame member 30 using a plurality of drill screws 52 respectively. The lower end portion of one wall surface material 50 and the lower end portion of the other wall surface material 50 are joined to the horizontal frame member 32 using a plurality of drill screws 52 respectively.

(Joint 60)
As shown in FIGS. 3 and 4, a plurality of joint portions 60 are formed at intervals in the vertical direction. These joints 60 are arranged more closely to the side of the opening 54 than to the side between the openings 54. For this reason, the arrangement interval L1 of the bonding portions 60 located on the side between the openings 54 is wider than the arrangement interval L2 of the bonding units 60 located on the side of the opening 54. The arrangement interval L1 is preferably twice or more the arrangement interval L2.

  Here, the side of the opening 54 refers to the side area of the opening 54 (arrow R1 in FIG. 3), and the side between the openings 54 refers to the opening 54 adjacent in the vertical direction. Point to the side area between them (arrow R2 in FIG. 3).

  Further, in the present embodiment, three bonding portions 60 are disposed laterally of the opening 54, and two bonding portions 60 are disposed laterally between the openings 54.

  Further, in the present embodiment, the first center line CL1 passing through the center of the joint portion 60 adjacent to the vertical frame member 24 in the vertical direction and the center of one opening 54 of the openings 54 adjacent to the vertical direction Of the second center line CL2 passing through the center of the joint portion 60 adjacent in the vertical direction of the vertical frame material 26 from the first intersection point P1 with the first horizontal line HL1 extending in the horizontal direction and the opening 54 adjacent in the vertical direction A straight line SL extending to the second intersection point P2 with the second horizontal line HL2 extending in the horizontal direction through the center of the other opening 54 is inclined in the range of 30 degrees to 60 degrees with respect to the vertical direction. In FIG. 3, the angle of the straight line SL with the vertical direction is indicated by θ.

  In addition, the center-to-center distance D1 of the openings 54 vertically adjacent to each other is shorter than the horizontal distance D2 between the joint portion 60 of the vertical frame 24 and the joint 60 of the vertical frame 26.

(Operation and effect of the present embodiment)
Next, the operation and effects of the present embodiment will be described.

  It has been conventionally assumed that the wall material behaves almost as a rigid body in the initial stage of shear deformation of the bearing wall (the shear force is uniformly transmitted to the joint between the wall material and the longitudinal member). For this reason, the arrangement interval of the joint portion has been made substantially constant on the basis of the arrangement interval corresponding to the largest shear force (in FIG. 7, the bearing wall 70 where the arrangement interval of the joint portion 60 is substantially constant. Show). However, in order to reduce the number of joints between the wall material and the longitudinal members (to reduce the number of drill screws), the inventors of the present invention have made the wall surface of the bearing wall 70 where the arrangement interval of the joints 60 is substantially constant. By analyzing the in-plane shear behavior of the material 50 and quantifying the force (shear force) transmitted to each joint 60, the required proof strength required for the joint 60 was determined. As a result, it has become clear from the initial stage of shear deformation of the bearing wall 70 that the shear force acting on the joint 60 is not uniform (see FIGS. 8 to 10). Specifically, as shown in FIGS. 8 to 10, the shear force acting on the joint 60 located on the side of the opening 54 of the wall material 50 is located on the side between the openings 54 adjacent to each other in the vertical direction. It has been found that the shear force acting on the joint 60 is exceeded. Taking these into consideration, the present inventors have led to the development of the present invention.

  In the bearing wall 20 of the present embodiment, for example, when a force (horizontal load) for relatively displacing the upper and lower portions of the bearing wall 20 in the horizontal direction is input due to an earthquake or the like, as shown in FIG. A shear force is transmitted to each joint portion 60 of the material 24 and the vertical frame material 26. Here, as shown in the bearing wall 70 of the comparative example, when the joints 60 are arranged at substantially constant intervals, the joint 60 located at the side between the openings 54 among the joints 60 functions. The shear force acting on the joint 60 located on the side of the opening 54 is larger than the shear force. For this reason, in the bearing wall 20, the joint portions 60 are disposed more closely on the side of the opening 54 than on the side between the openings 54 (see FIGS. 3 and 4). Thereby, the bearing wall 20 has, for example, a joint portion 60 between the vertical frame members 24, 26 and 28 and the wall surface member 50 as compared with the configuration in which the disposition interval of the joint portion is substantially constant (bearing wall 70 of the comparative example) Of the joints 60 can be reduced, and the number of joints 60 can be reduced. In addition, as shown in FIG. 4, by arranging the joint portions 60 closer to the side of the opening 54 than the side between the openings 54, the shear force SF transmitted to each joint 60 can be reduced. It approaches nearly equally.

  Further, in the bearing wall 20, the arrangement distance L2 of the joint portions 60 located laterally between the openings 54 is twice or more the arrangement distance L1 of the joint portions 60 located laterally of the openings 54, For example, the number of joints can be reduced as compared to a configuration of less than twice.

  Furthermore, in the bearing wall 20, since the opening 54 of the wall material 50 is circular, for example, stress concentration is alleviated and rigidity and resistance to shear deformation are improved as compared to the configuration in which the opening 54 is polygonal. Do.

  Furthermore, in the bearing wall 20, the centers of the openings adjacent in the vertical direction so that the straight line SL extending from the first intersection point P1 to the second intersection point P2 inclines in the range of 30 degrees to 60 degrees with respect to the vertical direction. The distance D1 is set. Thereby, in the bearing wall 20, the arrangement interval of the openings 54 is made appropriate.

  And in the bearing wall 20, since the center distance D1 is shorter than the horizontal distance D2, when the horizontal load by the earthquake is transmitted to the bearing wall 20, the joint portion 60 and the opening portion in the wall surface material 50 The shear stress value of the middle portion in the horizontal direction with 54 can be made lower than the shear stress value of the middle portion in the vertical direction between the openings 54 adjacent in the vertical direction. Thereby, the shear stress in the horizontal direction generated in the pair of vertical members (the vertical frame members 24 and 26 or the vertical frame members 26 and 28) is reduced. As a result, before the intermediate portion in the vertical direction between the openings 54 adjacent in the vertical direction in the wall surface material 50 is deformed, deformation of the joint portion 60 between the wall surface material 50 and the pair of vertical members is suppressed. It becomes possible to absorb energy stably.

  Although the drill screw 52 is used for joining of the frame material 22 and the wall surface material 50 in the bearing wall 20 of the above-mentioned embodiment, this invention is not limited to this structure. For example, a nail may be used instead of the drill screw 52. Further, the frame member 22 and the wall surface member 50 may be joined by spot welding. When spot welding is used, the welded portion of the frame member 22 and the wall member 50 is referred to as a joint.

  In the bearing wall 20 of the above-described embodiment, the lower hole is not formed in the wall surface material 50, but the present invention is not limited to this configuration, and the wall surface material 50 may be formed with a lower hole or a marking for drilling. Good.

  In the load-bearing wall 20 of the above-described embodiment, the three joints 60 are disposed laterally of the opening 54 and the two joints 60 are disposed laterally between the openings 54. It is not limited to the configuration. As shown in FIG. 11, three junctions 60 may be disposed laterally of the opening 54, and one junction 60 may be disposed laterally between the openings 54, as shown in FIG. As a configuration, three junctions 60 may be disposed to the side of the opening 54, and the junction 60 may not be disposed to the side between the openings 54.

  Although the wall material 50 is joined to the frame material 22 and the bearing wall 20 of the above-mentioned embodiment is comprised, this invention is not limited to this structure. For example, like a load bearing wall 80 shown in FIG. 13, a drill screw 52 is used for a pair of vertical members 82 which extend vertically and whose upper and lower ends are connected to the horizontal members HM1 and HM2 of the building. May be joined. In the same manner as the wall surface material 50, the wall surface material 84 is provided with the opening 54 and the annular rib 56, and the same operation and effect as the bearing wall 20 can be obtained.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited above, In the range which does not deviate from the main point, it can be variously deformed and implemented in addition to the above. Of course.

20 Load-bearing wall 24 vertical frame material (vertical material)
26 Vertical frame material (vertical material)
28 Vertical frame material (vertical material)
Reference Signs List 50 wall surface material 54 opening 56 annular rib 60 joint 80 bearing wall 82 vertical material 84 wall surface material CL1 first center line CL2 second center line HL1 first horizontal line HL2 second horizontal line P1 first intersection P2 second intersection R1 opening Side area (side of the opening)
R2 side area between openings (side between openings)
SL straight line

Claims (4)

A pair of vertical members extending vertically,
A wall surface member which is respectively joined to the pair of longitudinal members and in which an opening portion provided with an annular rib at an edge portion is formed at an interval in the vertical direction;
A joint that joins the vertical member and the wall member in the vertical direction at an interval;
Equipped with
A load-bearing wall, wherein the joints are arranged more closely to the sides of the openings than to the sides between the openings.   The bearing wall according to claim 1, wherein an arrangement interval of the joint portions located laterally between the openings is at least twice as large as an arrangement interval of the joint portions located laterally of the openings.   The load-bearing wall according to claim 1, wherein the opening is circular. A first center line passing through the center of the joint portion adjacent to the vertical direction of one of the longitudinal members and a horizontal line passing through the center of one of the openings adjacent to the vertical direction and extending horizontally The other opening of the second center line passing through the center of the joint adjacent to the other vertical member in the vertical direction from the first intersection point with the one horizontal line and the other of the openings adjacent to the vertical direction The straight line extending toward the second intersection point with the second horizontal line extending in the horizontal direction through the center of the line is inclined in the range of 30 degrees to 60 degrees with respect to the vertical direction. Bearing wall according to paragraph.