JP2014015805A - Joint structure of load bearing wall and joint member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint structure of a load bearing wall capable of easily ensuring construction accuracy when mounting a vertical frame material via a joint member on anchor bolts or bolts provided on a foundation or a beam, and to provide the joint member.SOLUTION: A joint structure 1 of the load bearing wall in which a vertical frame material 3 is mounted via a joint member 4 on anchor bolts 21 or bolts 24 provided on a foundation 2 or a beam 6 includes the joint member 4 having a vertical member 41 to be mounted on the vertical frame material 3, and a flange member 42 provided at a position on the side of a lateral frame material 7 from the foundation 2 or the beam 6 while extending from a base end 41a of the vertical member 41 to both sides, the flange member 42 having bolt insertion holes 44 through which the anchor bolts 21 or the bolts 24 are inserted to be fixed thereto.

Description

  The present invention relates to a joint structure and a joining member of a bearing wall in a building in which a bearing wall is used, particularly in a steel frame structure or a thin lightweight steel structure (steel house) using a shape steel as a frame member.

  Conventionally, a building in which a load-bearing wall is used is, for example, a vertical frame member installed at a predetermined interval, such as a steel house, and an upper horizontal frame member and a lower frame member that connect the upper and lower portions of these vertical frame members. A configuration including a horizontal frame member and a structural surface member attached to the side surfaces of the vertical frame member, the upper horizontal frame member, and the lower horizontal frame member is known (see, for example, Patent Document 1).

  These vertical frame members disclosed in Patent Document 1 have a pair of lip-shaped grooved steels formed by bending a thin steel plate into a concave groove shape, with the webs back to back, and both sides in the wall width direction being opened. So that they are installed side by side in the wall width direction. Further, the upper horizontal frame material and the lower horizontal frame material are made of grooved steel obtained by bending a thin steel plate into a concave groove shape so that one surface of the upper or lower part is opened. Further, the structural surface material is a thin steel plate or the like, and is fixed to one or both surfaces of the vertical frame material, the upper horizontal frame material, and the lower horizontal frame material by a fixing tool such as a screw or a drill screw.

  This bearing wall joint structure is formed, for example, by placing concrete on an anchor bolt provided from the upper surface of the foundation upward in the vertical direction, and by attaching a vertical frame member to the joint member to cast concrete. It is known that a vertical frame material is installed on a base that has been made.

  As described above, for example, a joint structure disclosed in Patent Document 2 has been proposed as a joint structure of a load bearing wall in which a vertical frame member is attached to an anchor bolt provided on a foundation via a joint member.

JP 2005-320860 A JP 2008-280787 A

  The disclosed technique of Patent Document 2 is to embed a base plate provided in a metal fitting as a foundation, and insert an anchor bolt into a bolt insertion hole of the base plate and fix it. This joining metal fitting is for attaching a joining longitudinal plate provided so as to extend vertically upward from the horizontal center of the base plate to the web of the longitudinal frame member.

  The disclosed technology of Patent Document 2 is that a base plate provided in a metal fitting is embedded in the foundation in advance, and a vertical frame member is installed along a vertical plate for bonding provided in the metal fitting and fixed with bolts. To do. In addition, the disclosed technology of Patent Document 2 is to form a foundation by placing concrete in a state where the base plate is embedded, and since the position of the base plate cannot be changed after the foundation is formed, high construction accuracy is achieved. It was necessary.

  Therefore, the present invention has been devised in view of these problems, and its object is to attach a vertical frame member to an anchor bolt or bolt provided on a foundation or a beam via a joining member. At the same time, it is an object of the present invention to provide a bearing structure and a joining member for a load bearing wall that can easily ensure construction accuracy.

  The joint structure of the bearing walls according to the first invention is a longitudinal member attached to the longitudinal frame member in the bearing wall joining structure in which a longitudinal frame member is attached to an anchor bolt or a bolt provided on a foundation or a beam via a joining member. And a flange member provided so as to extend on both sides from the base end portion of the vertical member at a position between the foundation or the beam and a horizontal frame member, and the flange member includes the anchor It has a bolt insertion hole for inserting and fixing a bolt or a bolt.

  According to a second aspect of the present invention, there is provided the bearing wall joining structure according to the first invention, wherein the joining member is attached so that the longitudinal member abuts the web of the longitudinal frame member, and the flange member is the web of the longitudinal frame member. The flange members are provided so as to extend from the base end of the vertical member to both sides in the wall width direction of the load-bearing wall through the openings formed in the bolt member, and the bolt members are respectively inserted into the bolt insertion holes on both sides in the wall width direction of the load-bearing wall. It is characterized by having.

  The joint structure of the bearing walls according to the third invention is the first invention or the second invention, wherein the joining member is attached to the longitudinal frame member in a state where the flange member is separated from the transverse frame member. It is characterized by being able to.

  A joining member according to a fourth aspect of the present invention is a joining member used for a bearing structure of a bearing wall according to any one of the first to third aspects of the invention, and is a longitudinal member attached so as to contact the web of the longitudinal frame member. And extending from the base end of the vertical member to both sides in the wall width direction of the load bearing wall through an opening formed in the web of the vertical frame member at a position between the foundation or the beam and the horizontal frame member. The flange member is provided with bolt insertion holes for inserting and fixing the anchor bolts or bolts on both sides of the load bearing wall in the wall width direction.

  According to the joint structure of the bearing walls according to the first to third inventions, the vertical member is fixed to the vertical frame member at a position where the flange member is located between the foundation or the beam and the horizontal frame member, so that the hardware does not move. Compared to the technology, the wall can be moved in the width direction, and the construction accuracy of the wall panel can be ensured even if the construction accuracy of the anchor bolt is relaxed.

  Furthermore, according to the joint structure of the load bearing walls according to the third invention, in addition to the above-described effect, when a tensile force acts on the vertical frame member, an insulator reaction force does not act on the end of the flange member, and an anchor bolt or Since the axial force of the bolt does not need to counter the insulator reaction force, the anchor bolt or the bolt and the foundation on which the anchor bolt or the bolt is provided are compared with the case where the joining member is embedded in the foundation or the beam. High structural strength is not required for the beam, and the cost required for constructing the bearing wall can be suppressed.

  According to the joining member which concerns on 4th invention, it becomes possible to provide the joining member which can implement | achieve the joining structure of the bearing wall which concerns on 1st invention-3rd invention.

It is a vertical front view which shows 1st Embodiment of the joining structure of the load-bearing wall which concerns on this invention. It is a cross-sectional top view which shows 1st Embodiment of the joining structure of a load-bearing wall which concerns on this invention. It is a front view of a load-bearing wall where the joint structure of load-bearing walls according to the present invention is used. It is a vertical front view which shows 2nd Embodiment of the joining structure of a bearing wall which concerns on this invention. It is a partially broken perspective view which shows 2nd Embodiment of the joining structure of the load-bearing wall which concerns on this invention. It is a vertical left side view which shows 2nd Embodiment of the joining structure of a bearing wall which concerns on this invention. It is a right view which shows 2nd Embodiment of the joining structure of a bearing wall which concerns on this invention. It is a right view which shows the modification of the vertical frame material of the joining structure of a bearing wall which concerns on this invention. It is a vertical front view which shows the modification of the volt | bolt and nut of the joining structure of a bearing wall which concern on this invention. It is a cross-sectional top view which shows the modification of the volt | bolt and nut of the joining structure of a bearing wall which concern on this invention. It is a cross-sectional top view which shows 2nd Embodiment of the joining structure of a bearing wall which concerns on this invention. (A) is a longitudinal front view showing the action of the tensile force and the axial force in the joint structure of the load bearing walls according to the present invention, and (b) is the tension in the joint structure of the load bearing wall in which the joining member is embedded in the foundation. It is a vertical front view which shows an effect | action of force, axial force, and a lever reaction force.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out a bearing wall bonding structure 1 to which the present invention is applied will be described in detail with reference to the drawings.

  In particular, in the steel house, for example, as shown in FIG. 3, the load bearing wall 9 includes a vertical frame member 3 installed on the foundation 2 and the beam 6 at a predetermined interval, and an upper portion and a lower portion of the vertical frame member 3. The horizontal frame member 7 to be connected and the structural frame member 8 attached to the side surfaces of the vertical frame member 3 and the horizontal frame member 7 are provided. Further, the bearing wall 9 may be appropriately provided with an intermediate frame member 9a in the middle between the vertical frame members 3 installed at a predetermined interval or in the middle between the horizontal frame members 7. The joint structure 1 of the bearing walls to which the present invention is applied is a place where the vertical frame member 3 is attached to the foundation 2 or a place where the vertical frame member 3 is attached to the beam 6 provided between the upper floor and the lower floor of the building. Provided.

  As shown in FIGS. 1 to 3, the foundation 2 is made of concrete in a state in which two anchor bolts 21 are provided from the upper surface 2 a of the foundation 2 in the vertical direction at the attachment position of the vertical frame member 3. It is formed by casting.

  As shown in FIG. 1, the bearing wall joint structure 1 to which the present invention is applied is installed along the web 7 a of the horizontal frame member 7 on the upper surface 6 a of the beam 6 in the first embodiment. The joining member 4 is attached to the vertical frame member 3 by bringing the lower surface 42b of the flange member 42 into contact with the web 7a.

  As shown in FIG. 2, the vertical frame member 3 is formed by using a first shape steel 31 and a second shape steel 32 of a grooved steel with a lip formed by bending a thin steel plate into a concave groove shape and opening one surface. The web 31a of the first structural steel 31 and the web 32a of the second structural steel 32 are brought into contact with each other, and the first structural steel 31 and the second structural steel 32 are arranged back to back in the wall width direction X.

  In the vertical frame member 3, flanges 31 b on both sides of the first shape steel 31 and flanges 32 b on both sides of the second shape steel 32 are arranged on both sides in the wall thickness direction Y of the vertical frame member 3. The vertical frame member 3 is formed with an opening 33 that is communicated in the wall width direction X by notching the lower end of the web 31 a of the first shape steel 31 and the web 32 a inside the second shape steel 32.

  The lateral frame member 7 is formed by bending a thin steel plate into a concave groove shape and forming a grooved steel having one surface opened on the upper surface 2a of the foundation 2 so that the upper portion is a concave groove opening. It is installed along 7a. An insertion hole 7 b through which the anchor bolt 21 is inserted is formed in the web 7 a of the horizontal frame member 7. The horizontal frame member 7 has the upper surface 2a of the foundation 2 and the lower end of the vertical frame member 3 in a state in which both side portions in the wall thickness direction Y of the lower end of the vertical frame member 3 are sandwiched by flanges 7c on both side portions of the horizontal frame member 7. It is installed between.

  The structural face material 8 is a folded steel plate or the like on the outdoor side, and a non-metallic material such as plywood or gypsum board on the indoor side. The structural face material 8 is not limited to this, and a non-metallic material may be used on the outdoor side, and a steel plate or the like may be used on the indoor side. The material 7 is fixed on one side or both sides in the wall thickness direction Y.

  The joining member 4 includes a plate-like vertical member 41 that is long in the vertical direction, and a flange member 42 that is provided so as to extend horizontally from the base end portion 41a of the vertical member 41 toward both sides in the wall width direction X. The joining member 4 is attached to the longitudinal frame member 3 by bringing the longitudinal member 41 into contact with the web 31a of the first shape steel 31 and fixing them with bolts 43a and nuts 43b. In the joining member 4, the vertical member 41 is fixed to the web 31 a of the first shape steel 31 with the flange member 42 sandwiching the horizontal frame member 7 between the upper surface 2 a of the foundation 2.

  The flange member 42 is provided on the inside and outside of the load bearing wall 9 in the wall width direction X through the opening 33, and the anchor bolt 21 is inserted and fixed on the inside and outside of the load bearing wall 9 in the wall width direction X, respectively. A bolt insertion hole 44 is provided. The flange member 42 is fixed on the upper surface 42a of the flange member 42 by tightening the anchor bolt 21 inserted through the bolt insertion hole 44 with a nut 21a.

  As shown in FIG. 1, the bearing wall joining structure 1 to which the present invention is applied has a foundation 2 from above the web 7 a of the lateral frame member 7 inside the bearing wall 9 in the wall width direction X rather than the vertical frame member 3. Is provided with a shear anchor 22. Thereby, the joint structure 1 of the load bearing walls to which the present invention is applied, when the horizontal force H acts on the load bearing wall 9 due to an earthquake, wind, or the like, from the web 7a of the horizontal frame member 7 via the auxiliary anchor bolts 22. A horizontal force H can be transmitted to the foundation 2.

  At this time, in the joint structure 1 of the bearing walls to which the present invention is applied, the horizontal force H can be transmitted to the foundation 2 by providing the shear anchor 22, so the joining member 4 is not embedded in the foundation 2. Even so, the load bearing wall 9 can counter the horizontal force H.

  The bearing wall joint structure 1 to which the present invention is applied can also be used when the vertical frame member 3 is attached to a beam 6 provided between the upper floor and the lower floor of the building, as shown in FIG. . At this time, the joining member 4 is attached to the vertical frame members 3 on the upper floor and the lower floor, and is fixed to the upper and lower portions of the joining block 10 with bolts 24.

  For example, as shown in FIG. 3, a steel material having an H-shaped cross section may be used for the joining block 10. At this time, the sectional area of the flange portion of the joining block 10 is the sectional area of the flange member 42 of the joining member 4. As described above, the cross-sectional area of the web portion of the joining block 10 is desirably equal to or greater than the total cross-sectional area of the bolt 24.

  When the joining member 4 is fixed to the lower part of the joining block 10 on the lower floor of the building, the bearing wall joining structure 1 to which the present invention is applied is joined so that the flange member 42 is provided at the upper end of the longitudinal member 41. The member 4 can be reversed and attached to the vertical frame member 3.

  As shown in FIGS. 4 and 5, the bearing wall joint structure 1 to which the present invention is applied is installed along the web 7 a of the horizontal frame member 7 on the upper surface 6 a of the beam 6 in the second embodiment. The joining member 4 can also be attached to the vertical frame member 3 by separating the lower surface 42b of the flange member 42 from the web 7a of the frame member 7.

  The vertical frame member 3 includes a first shape steel 31 of a lip-shaped grooved steel in which one surface is opened by bending a thin steel plate into a concave groove shape, and a second box-shaped steel in which the thin steel plate is bent into a rectangular shape. The section steel 32 is installed side by side in the wall width direction X. The first shape steel 31 is provided on the inner side in the wall width direction X of the load bearing wall 9 so that the side portion of the vertical frame member 3 becomes the opening of the groove. The second shape steel 32 is provided on the outer side of the load bearing wall 9 in the wall width direction X by causing the web 31 a of the first shape steel 31 to abut the web 32 a inside the second shape steel 32.

  The joining member 4 includes a plate-like vertical member 41 that is long in the vertical direction, and a flange member 42 that is provided so as to extend horizontally from the base end portion 41a of the vertical member 41 toward both sides in the wall width direction X. The joining member 4 is attached to the longitudinal frame member 3 by bringing the longitudinal member 41 into contact with the web 31a of the first shape steel 31 and fixing them with bolts 43a and nuts 43b. In the joining member 4, the longitudinal member 41 is fixed to the web 31 a of the first shape steel 31 in a state where the flange member 42 is separated upward from the upper surface 2 a of the foundation 2.

  The flange member 42 is provided on the inside and outside of the load bearing wall 9 in the wall width direction X through the opening 33, and the anchor bolt 21 is inserted and fixed on the inside and outside of the load bearing wall 9 in the wall width direction X, respectively. A bolt insertion hole 44 is provided. The flange member 42 is fixed on the upper surface 42a and the lower surface 42b of the flange member 42 by fastening the anchor bolt 21 inserted through the bolt insertion hole 44 with a nut 21a.

  The bearing wall joint structure 1 to which the present invention is applied can also be used when the vertical frame member 3 is attached to a beam 6 provided between the upper floor and the lower floor of the building, as shown in FIG. . At this time, the joining member 4 is attached to the vertical frame members 3 on the upper floor and the lower floor, and is fixed to the upper and lower portions of the long bolt 24 having a length from the upper floor to the lower floor.

  In the joint structure 1 of the bearing wall to which the present invention is applied, when the joining member 4 is fixed to the lower part of the long bolt 24 on the lower floor of the building, the flange member 42 is provided at the upper end of the vertical member 41. The joining member 4 can be reversed and attached to the vertical frame member 3.

  As shown in FIGS. 6 and 7, the joint structure 1 of the bearing walls to which the present invention is applied inserts a bolt 43 a from the outside of the bearing wall 9 in the wall width direction X and tightens a nut 43 b from the inside of the bearing wall 9. Thus, the vertical member 41 of the joining member 4 is attached to the vertical frame member 3. In the second shape steel 32, the lower end of the web 32c outside the bearing wall 9 is cut out, and an opening 32d is formed so that the nut 21a of the anchor bolt 21 can be tightened from the side.

  As shown in FIG. 8, the joint structure 1 of the bearing walls to which the present invention is applied is attached by opening a part of the web 32 c outside the bearing wall 9 so that the bolt 43 a can be fixed from the outside of the bearing wall 9. A hole 32e may be formed.

  As shown in FIG. 9, the bearing wall joining structure 1 to which the present invention is applied attaches the longitudinal member 41 of the joining member 4 to the longitudinal frame member 3 using a drill screw 43c instead of the bolt 43a and the nut 43b. You can also. The bearing wall joining structure 1 to which the present invention is applied may be used in which the drill screws 43c are arranged in two rows in the wall thickness direction Y as shown in FIG.

  In the bearing wall joining structure 1 to which the present invention is applied, as shown in FIG. 11, the longitudinal member 41 is brought into contact with the web 31 a of the first shape steel 31 which is the inside of the load bearing wall 9. The inner web 32a may not be contacted. At this time, in the bearing wall joining structure 1 to which the present invention is applied, the width in the wall width direction X of the second structural steel 32 outside the bearing wall 9 provided with the window frame and the like is equal to the thickness of the vertical member 41. Can be reduced.

  As shown in FIG. 12A, when the tensile force P is applied to the vertical frame member 3 due to an earthquake, wind, or the like, the bearing wall joining structure 1 to which the present invention is applied has a tensile force P that is a bolt 43a and a nut. It is transmitted to the vertical member 41 through 43b, and transmitted from the vertical member 41 through the flange member 42 to the anchor bolt 21 through the nut 21a. At this time, the bearing wall joining structure 1 to which the present invention is applied can secure the joining between the foundation 2 and the vertical frame member 3 by the balance between the axial force B and the tensile force P of the anchor bolt 21.

  On the other hand, when the joining member 100 is embedded in the foundation 2, as shown in FIG. 12B, the longitudinal member 101 is pulled by the tensile force P, and the flange member 102 is fixed by the nut 103a. As a result, the insulator reaction force R acts on the end portion of the flange member 102 upward from the foundation 2. At this time, when the joining member 100 is embedded in the foundation 2, the axial force B ′ of the anchor bolt 103 must counter not only the tensile force P but also the insulator reaction force R, and the present invention is applied. It is necessary to use anchor bolts 103 having higher strength than the joint structure 1 of the bearing walls.

  Also, in the bearing wall bonding structure 1 to which the present invention is applied, the flange member 42 is fixed to the vertical member 41 in a state where it is separated upward from the upper surface 2a of the foundation 2, and the tensile force P acts on the vertical frame member 3. Since the lever reaction force R does not act on the end of the flange member 42 and the axial force B of the anchor bolt 21 does not need to counter the lever reaction force R, the joining member 100 is embedded in the foundation 2. Compared to the case where the anchor bolt 21 and the foundation 2 on which the anchor bolt 21 is provided, high structural strength is not required, and the cost required for the construction of the bearing wall 9 can be suppressed.

  In this embodiment, the bearing wall bonding structure 1 to which the present invention is applied has the two anchor bolts 21 disposed at substantially equal positions from the centroid of the vertical frame member 3 on which the tensile force P acts. The joint structure 1 of the bearing walls to which the invention is applied can suppress an increase in bending moment acting on the vertical frame member 3 and the joining member 4.

  In this embodiment, the bearing wall joining structure 1 to which the present invention is applied is a case where the flange member 42 can be fixed upwardly away from the upper surface 2a of the foundation 2 and therefore the upper surface 2a of the foundation 2 is uneven. Even in such a case, the vertical member 41 can be attached to a predetermined position in the vertical direction of the vertical frame member 3.

  Further, the bearing wall joint structure 1 to which the present invention is applied is such that the yield strength of the joining member 4 is set lower than the yield strength of the plurality of anchor bolts 21, and a part thereof can be deformed while maintaining the strength. May be. At this time, in the bearing wall joining structure 1 to which the present invention is applied, since the joining member 4 is not embedded in the foundation 2, the deformed joining member 4 can be easily replaced.

  As mentioned above, although embodiment of this invention was described in detail, all the embodiment mentioned above showed only the example of actualization in implementing this invention, and the technical scope of this invention is by these. It should not be interpreted in a limited way.

1: Bearing wall joint structure 2: Foundation 2a: Top surface 21 of foundation: Anchor bolt 21a: Anchor bolt nut 22: Shear anchor 24: Bolt 3: Vertical frame 31: First section steel 31a: First section steel Web 31b: First section steel flange 32: Second section steel 32a: Second section steel inner web 32b: Second section steel flange 32c: Second section steel outer web 32d: Second section steel Outer web opening 32e: Second web outer web mounting hole 33: Vertical frame member opening 4: Bonding member 41: Vertical member 41a: Vertical member base end 42: Flange member 42a: Flange Member upper surface 42b: Flange member lower surface 43a: Joining member bolt 43b: Joining member nut 44: Flange member bolt insertion hole 6: Beam 6a: Beam upper surface 7: Horizontal frame member 7a: Horizontal frame member web 7b : Horizontal frame material insertion hole 7c: Horizontal frame material flange 8: Structural face material 9: Bearing wall 9a: Intermediate frame material 10: Joining block B: Axial force H: Horizontal force P: Tensile force R: Insulator reaction force X: Wall width direction Y: Wall thickness direction

Claims (4)

In the joint structure of the load bearing wall in which the vertical frame member is attached to the plurality of anchor bolts or bolts provided on the foundation or the beam via the joining member,
A joining member having a longitudinal member attached to the longitudinal frame member and a flange member provided so as to extend from the base portion of the longitudinal member to both sides at a position between the foundation or the beam and the lateral frame member Prepared,
The flange member has a bolt insertion hole for inserting and fixing the anchor bolt or the bolt. The joining member is attached so that the vertical member abuts against the web of the vertical frame member, and the flange member extends from the base end portion of the vertical member through an opening formed in the web of the vertical frame member. Provided to extend on both sides of the wall width direction,
The bearing structure according to claim 1, wherein the flange member has the bolt insertion holes on both sides in the wall width direction of the bearing wall. The joint structure of a load bearing wall according to claim 1, wherein the longitudinal member is attached to the vertical frame member in a state where the flange member is separated from the horizontal frame member. A joining member used in the joining structure of a load bearing wall according to any one of claims 1 to 3,
A vertical member attached to abut against the web of the vertical frame member, and a base of the vertical member through an opening formed in the web of the vertical frame member at a position between the foundation or the beam and the horizontal frame member. A flange member provided so as to extend from the end to both sides in the wall width direction of the load bearing wall,
The flange member has bolt insertion holes for inserting and fixing the anchor bolts or bolts on both sides in the wall width direction of the bearing wall.

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