JP2018076649A - Leg part joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leg part joint structure of a load bearing wall capable of improving strength while being a simple structure.SOLUTION: In a leg joint structure 50, a joint metal 20 is disposed between a rectangular steel tube 15 constituting a vertical frame member 11 and a base 3. In addition, the joint metal 20 is joined to the inside of a lower end 15a side of the rectangular steel tube 15 in a fin plate 22 which is an upper member, and is joined to the base 3 in a slit-in plate 30 which is a lower member. In this way, by using the rectangular steel tube 15 as the vertical frame member 11 and joining the joint metal 20 to the inside thereof, it is possible to obtain sufficient strength as the leg joint structure 50 supporting a load bearing wall 10. Further, it is possible to provide a simple structure merely by joining the joint metal 20 to the inside of the rectangular steel tube 15.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a leg joint structure for a load bearing wall.

  Conventionally, what is mentioned in patent document 1 is known as a leg part joining structure of a bearing wall. In the leg joint structure shown in Patent Document 1, the vertical frame material that supports the panel material of the load bearing wall is made of an H-shaped steel material, and a hole down hardware is attached to the side surface of the vertical frame material of the steel material. The hole down hardware is connected to an anchor bolt extending from a concrete foundation.

JP 2007-39940 A

  Here, in recent years, a conventional frame structure composed of wooden columns, wooden beams, wooden foundations, and concrete foundations is required to have a higher strength as the joint structure of the bearing walls. It has been. On the other hand, the above-mentioned leg joint structure of the load-bearing wall has a problem that the strength is insufficient for the demand. Moreover, when a complicated structure is employed in order to improve the strength, there arises a problem that work efficiency during construction is lowered. From the above, it has been required to improve the strength while having a simple structure.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a leg joint structure of a load bearing wall that can improve strength while having a simple structure.

  The leg joint structure according to the present invention is a vertical structure installed in a column and beam structure in a conventional frame structure composed of a wooden column, a wooden beam, a wooden base, and a concrete foundation. It is a leg joint structure of a load bearing wall provided with a frame material and a panel material, and a joint hardware is arranged between the steel pipe and the base constituting the vertical frame material so that the joint hardware faces the upper surface of the base. An intermediate member extending upward, an upper member projecting upward on the upper surface side of the intermediate member and extending along a thickness direction of the bearing wall, and projecting downward on the lower surface side of the intermediate member and bearing wall A lower member extending along the lateral direction in which the width of the steel pipe extends, and the joining hardware is joined to the inside of the lower end side of the steel pipe in the upper member, joined to the base in the lower member, and up and down in the intermediate member Rod-shaped part extending in the direction Characterized in that it is joined to the foundation through.

  In the leg joint structure according to the present invention, the joint hardware is arranged between the steel pipe and the base constituting the vertical frame member. Moreover, the joining hardware is joined to the inside of the lower end side of the steel pipe in the upper member, and joined to the base in the lower member. Thus, while using a steel pipe as a vertical frame material and joining a joining metal object inside, sufficient intensity | strength can be acquired as a leg part joining structure which supports a load-bearing wall. Moreover, it can be set as the simple structure which only joins a metal fitting inside a steel pipe. As described above, the strength can be improved while the structure is simple.

  Further, in the leg joint structure according to the present invention, the intermediate member is configured by a base plate that extends on the upper surface of the base so as to face the upper surface of the base, and the upper member is provided on the upper surface side of the base plate, The lower member is formed by a slit-in plate provided on the lower surface side of the base plate and disposed inside the base, and the rod-shaped member is formed by the upper end portion. The base plate is fixed to the base plate, extends downward and penetrates the base, and the lower end portion is constituted by an anchor bolt disposed on the foundation.The steel pipe and the fin plate are joined by a shaft member extending in the lateral direction, and the base and The slit in plate is joined with pins extending in the thickness direction, and the base and base plate are connected via anchor bolts. It may be joined. In this way, the fin plate is inserted into the steel pipe and joined with the shaft member, the slit in plate is placed inside the base and joined with the pin, and the joint hardware is joined to the foundation with the anchor bolt fixed to the base plate A simple structure can be obtained. Therefore, even when a steel pipe is used as the vertical frame member, the leg joint structure can be easily configured without reducing workability.

  In the leg joint structure according to the present invention, in the metal joint, the upper member has a portion formed in an arc shape on the upper side, and the lower portion has a portion formed in an arc shape on the lower side. You may have. With such a configuration, when the upper member is inserted into the steel pipe, the steel pipe can be inserted while being guided by the arc-shaped portion. Further, when the lower member is inserted into the base, the lower member can be inserted into the base while being guided by the arc-shaped portion. Thereby, workability | operativity can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, although it is a simple structure, the intensity | strength of the leg part joint structure of a load-bearing wall can be improved.

It is a perspective view which shows an example of the conventional frame structure to which the leg part junction structure which concerns on this invention was applied. It is a front view of a load bearing wall to which a leg joint structure according to the present invention is applied. It is a front view which shows the joining metal fitting used with the leg part joining structure which concerns on this invention. It is a perspective view which shows the structure around a joint metal fitting. It is a graph which shows a test result.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing an example of a conventional shaft assembly to which a load-bearing wall leg joint structure according to an embodiment of the present invention is applied. In FIG. 1, a two-story wooden house is shown as an example of the conventional frame structure 100. As shown in FIG. 1, the conventional frame structure 100 includes a wooden column 1, a wooden beam 2, a wooden base 3, and a concrete foundation 4. The foundation 4 is configured by placing concrete on the ground, and supports the load of the entire structure. The base 3 is configured by providing a wooden member extending in the lateral direction on the upper surface of the foundation 4. The pillar 1 is configured by providing a wooden member extending in the vertical direction at a corner of the foundation 4 or the like. The beam 2 is configured by bridging a wooden member extending in the lateral direction between the upper ends of the columns. In the second floor portion, the pillar 1 is provided on the upper surface of the beam 2. In this embodiment, a continuous foundation (cloth foundation) that is integrally spread with respect to the plurality of pillars 1 is applied as the foundation 4. However, as the foundation 4, an independent foundation in which one foundation 4 independent of the other foundation 4 is provided for one pillar 1 may be applied.

  The load-bearing wall 10 includes a vertical frame member 11 and a panel member 12 that are installed in the surface of the pillar 1 and the beam 2. The vertical frame member 11 is constituted by a square steel pipe 15 extending in the vertical direction between the foundation 4 and the beam 2. The vertical frame members 11 are arranged in the horizontal direction with a predetermined interval in the plane of the pillar 1 and the beam 2. The panel material 12 is provided so that the clearance gap between each vertical frame material 11 may be covered. In the second floor part, a vertical frame member 11 is provided between the beam 2 in the ceiling part of the first floor and the beam 2 in the ceiling part of the second floor. The column 1 and the beam 2 of the conventional frame structure 100 mainly bear a long-term load (a load generated by the weight of the building itself), whereas the bearing wall 10 generates a horizontal force generated during an earthquake or the like. Pay mainly.

  With reference to FIG. 2, the leg joint structure 50 of the bearing wall 10 and its peripheral configuration will be described in detail. As shown in FIG. 2, in the leg joint structure 50, the joint hardware 20 is disposed between the square steel pipe 15 constituting the vertical frame member 11 and the foundation 4. Moreover, the joining hardware 20 is joined inside the square steel pipe 15 at the lower end 15a side at the upper end 20a, and joined to the base 3 at the lower end 20b. The square steel pipe 15 constituting the vertical frame member 11 is a hollow member having a rectangular cross section. Therefore, an opening is provided at the lower end 15 a of the square steel pipe 15. The upper end 20 a of the metal joint 20 is inserted into the square steel pipe 15 from the opening at the lower end 15 a of the square steel pipe 15. Further, the upper end portion 20 a of the metal joint 20 is joined to the square steel pipe 15 inside the square steel pipe 15. The base 3 continuously extends on the upper surface of the foundation 4 along the direction in which the foundation 4 extends.

  With reference to FIG.3 and FIG.4, the structure of the metal joint 20 is demonstrated in detail. In the following description, the terms “width direction D1”, “height direction D2”, and “thickness direction D3” are used with reference to the bearing wall 10. As shown in FIGS. 3 and 4, the metal joint 20 includes a base plate 21, a fin plate 22, and a slit-in plate 30. The base plate 21 constitutes an intermediate member that spreads so as to face the upper surface 3 a of the base 3. The fin plate 22 constitutes an upper member that protrudes upward and extends in the thickness direction D3 of the bearing wall 10 on the upper surface 21a side of the base plate 21 that is an intermediate member. The slit in plate 30 constitutes a lower member that protrudes downward and extends along the width direction of the load bearing wall 10 on the lower surface 21 b side of the base plate 21 that is an intermediate member. The metal fitting 20 is joined to the inside at the lower end 15a side of the square steel pipe 15 in the fin plate 22 as the upper member, joined to the base 3 in the slit in plate 30 as the lower member, and in the base plate 21 as the intermediate member, It is joined to the foundation 4 via anchor bolts 34 which are rod-like members extending in the vertical direction.

  The base plate 21 spreads on the upper surface 3 a of the base 3 so as to face the upper surface 3 a of the base 3. The base plate 21 is placed on the upper surface 3 a of the base 3. The base plate 21 is a rectangular plate-shaped member that extends in the horizontal direction. In the present embodiment, the base plate 21 is formed in a rectangular parallelepiped shape with the width direction D1 as the long side direction (see particularly FIG. 4), but may be a square or the like, and the shape of the base plate 21 is not particularly limited. A lower end 15 a of the square steel pipe 15 is installed on the upper surface 21 a of the base plate 21. The lower surface 21 b of the base plate 21 is disposed so as to contact the upper surface 3 a of the base 3. However, another member may be interposed between the upper surface 3 a of the base 3 and the lower surface 21 b of the base plate 21.

  Both end sides in the width direction D1 of the base plate 21 are configured as fixing portions 26 for fixing the anchor bolts 34. The fixing portion 26 is provided with a through hole through which the anchor bolt 34 is inserted. The anchor bolt 34 is fixed to the fixing portion 26 of the base plate 21 at the upper end portion, extends downward, penetrates the base 3, and constitutes a rod-like member whose lower end portion is disposed on the foundation 4. The through hole through which the anchor bolt 34 is inserted may have an oval shape extending along the width direction D <b> 1 in order to be able to adjust the mounting position of the anchor bolt 34. The upper end portion of the anchor bolt 34 inserted into the through hole protrudes from the upper surface 21 a of the base plate 21, and the upper end portion is tightened with a nut 37.

  The fin plate 22 is provided on the upper surface 21 a side of the base plate 21 and is configured by a plate-like member inserted into the lower end 15 a side of the square steel pipe 15. The pair of fin plates 22 extend straight from the upper surface 21a of the base plate 21 upward in the height direction D2 so as to be parallel to each other in the width direction D1. The outer side surface 22a in the width direction D1 of the pair of fin plates 22 contacts each inner surface 15b (inner surface facing the width direction) of the square steel pipe 15 (see particularly FIG. 3). Thus, the square steel pipe 15 can fully be supported by the fin plate 22 contacting the square steel pipe 15 from the inside.

  The fin plate 22 has a side edge 22b formed in an arc shape so as to taper upward when viewed from the width direction D1 (see particularly FIG. 4). Specifically, the fin plate 22 has a pair of side edge portions 22b facing the thickness direction D3, and an upper edge portion 22c. The side edge 22b of the fin plate 22 extends straight from the upper surface 21a of the base plate 21 upward. The side edge portion 22b is in contact with the inner surface 15b of the square steel pipe 15 (or in close proximity so as to form a slight gap). The side edge portion 22b in the vicinity of the upper end has an arc portion 22d that draws an arc that swells outward. With such a shape, when the square steel pipe 15 is joined to the metal fitting 20 during construction, when the square steel pipe 15 is to be inserted into the fin plate 22 in an inclined state, the square steel pipe 15 is placed on the fin plate 22. It can be inserted without interfering with the edge 22c or the like. Further, the square steel pipe 15 can be easily inserted into the fin plate 22 by the inner surface 15b of the square steel pipe 15 being guided by the arc portion 22d. The shape of the fin plate 22 is not particularly limited. For example, the entire upper edge portion 22c of the fin plate 22 may have an arc shape by the upper edge portion 22c also having an arc shape. Further, the entire fin plate 22 may be arcuate. Moreover, it may not be circular arc shape and the fin plate 22 may be notched so that it may incline linearly. Further, the fin plate 22 may be rectangular.

  The fin plate 22 is provided with a through hole. Moreover, the through-hole is formed in a pair of tube wall which opposes the width direction D1 among the four-sided tube walls in the square steel pipe 15. FIG. The through hole of the fin plate 22 and the through hole of the square steel pipe 15 are formed at positions overlapping each other when viewed from the width direction D1. By using these through holes, the square steel pipe 15 and the fin plate 22 are joined by a shaft member 27 extending in the lateral direction. For example, a bolt or a drill screw is employed as the shaft member 27. The shaft member 27 is inserted in the width direction D <b> 1 with respect to the through hole formed in the square steel pipe 15 and the through hole of the fin plate 22.

  The slit in plate 30 is provided on the lower surface 21 b side of the base plate 21 and constitutes a lower member disposed inside the base 3. The slit in plate 30 is disposed at the center position in the thickness direction D3 on the lower surface 21b of the base plate 21. The slit in plate 30 extends in parallel with the width direction D1. When viewed from the height direction D2, the slit in plate 30 intersects the fin plate 22 at 90 °. The slit in plate 30 is formed in a substantially rectangular parallelepiped shape with the width direction D1 as the long side direction when viewed from the thickness direction D3 (see particularly FIG. 4). However, the shape of the slit-in plate 30 may be a square or the like, and is not particularly limited. Further, the arrangement in which the slit in plate 30 is provided is not particularly limited, and the angle with the fin plate 22 when viewed from the height direction D2 is not limited to 90 °. What is necessary is just to be arrange | positioned inside the base 3. The side edge portions 30b on both sides of the slit in plate 30 facing the width direction D1 are disposed inside the anchor bolt 34 in the width direction D1. The position of the lower edge portion 30a of the slit-in plate 30 is not particularly limited, but is disposed at least above the lower surface 3b of the base 3, that is, above the upper surface 4a of the foundation 4.

  The slit-in plate 30 configured as described above is attached to the base 3 by being inserted into a slit portion formed in the base 3. The slit portion is a slit groove that extends downward from the upper surface 3a of the base 3 and extends in parallel with the width direction D1. The base 3 and the slit in plate 30 are joined by a pair of drift pins 31 extending in the thickness direction D3. The pair of drift pins 31 are arranged so as to be separated from each other in the width direction D1. The slit in plate 30 and the base 3 have through holes at positions where the drift pins 31 are inserted. The drift pin 31 is inserted from one side surface in the thickness direction D <b> 3 of the base 3, passes through the slit-in plate 30 and the through hole of the base 3, and extends to the other side surface of the base 3. However, the number of drift pins 31 is not particularly limited, and three or more drift pins 31 may be used.

  A corner between the lower edge 30a and the side edge 30b of the slit in plate 30 is formed in an arc shape. Specifically, an arc portion 30c is formed between the lower edge portion 30a and the side edge portion 30b. Due to such a shape of the slit-in plate 30, when trying to insert the slit-in plate 30 into the slit part of the base 3 during construction, the lower edge part 30 a of the slit-in plate 30 with respect to the slit part of the base 3, etc. Can be inserted without interference. Further, the slit in plate can be easily inserted into the base 3 by being guided by the arc portion 3 c with respect to the slit portion of the base 3. In addition, the shape of the slit in plate 30 is not specifically limited. For example, the entire lower edge 30a may be arcuate. Moreover, it may not be circular arc shape and the slit in plate 30 may be notched so that it may incline linearly. The slit in plate 30 may be rectangular. The slit in plate 30 may be divided in the width direction D1. For example, in the embodiment, one slit in plate has two through holes for the drift pins 31, but each of the two slit in plates has one through hole for each drift pin 31. It's okay.

  Next, the operation and effect of the leg joint structure 50 according to the present embodiment will be described.

  First, a conventional bearing wall will be described. In the field of wooden houses such as the conventional shaft construction method, the bearing wall that resists horizontal forces such as seismic force increases the axial force (the force to be pulled out) on the leg joint structure that is the fastening part with the foundation as the proof stress increases. ) Acts. In addition, when the width of the bearing wall is reduced (for example, less than 910 mm) due to the recent demand for reducing the width of the bearing wall, the tensile axial force acting on the leg in proportion to the aspect ratio of the bearing wall Becomes bigger. For example, when the wall width is B and the wall height is H, when a horizontal force load P is applied to the top of the bearing wall, the tensile axial force N acting on the leg is N = P × H / B. . Accordingly, when the wall width B is halved, the tensile axial force N is doubled. Therefore, in a leg joint structure of a small bearing wall, it is economical to transmit stress on the basis of a large tensile axial force acting with a compact joint metal, and there is a high demand for commercialization.

  Here, as a conventional leg joint structure, there are a type using an eccentric hardware and a type using an eccentric metal. The eccentric hardware is a hardware that is attached to the outer surface in the vicinity of the lower end of the column, extends downward, and is fixed via a foundation and an anchor bolt. In this way, when using an eccentric hardware that is supported at an eccentric position from the column, since the joint is eccentric, an excessive compressive force is applied to the column due to the influence of the additional bending caused by it. There is a problem that power becomes low. The eccentric hardware is a metal fitting that supports a pillar by making a hole in the bottom surface of a wooden pillar, burying the metal fitting in the hole, and fixing it to the foundation. In the case of using an eccentric hardware, there is a problem that the maximum tensile force of the column is lowered because the size of the hardware cannot be made so large due to the restriction of the cross-sectional defect of the column due to the metal penetrating through the inside of the column.

  On the other hand, in the leg joint structure 50 according to the present embodiment, the joint hardware 20 is disposed between the square steel pipe 15 constituting the vertical frame member 11 and the base 3. Further, the joint hardware 20 is joined to the inside on the lower end 15a side of the rectangular steel pipe 15 in the fin plate 22 which is the upper member, and is joined to the base 3 in the slit-in plate 30 which is the lower member. Thus, while using the square steel pipe 15 as the vertical frame member 11 and joining the joint hardware 20 to the inside thereof, sufficient strength can be obtained as the leg joint structure 50 that supports the bearing wall 10. Moreover, it can be set as the simple structure which only joins the metal fitting 20 inside the square steel pipe 15. FIG. As described above, the strength can be improved while the structure is simple.

  Further, the pair of fin plates 22 are inserted into the load bearing wall 10 using the square steel pipe 15 as a vertical frame member and joined by the shaft member 27, so that the load bearing wall 10 acts on the legs when receiving the horizontal force. It can correspond to the pulling force. Further, by fixing the anchor bolt 34 to the fixing portion 26 of the base plate 21 of the metal joint 20, the axial tensile force acting on the metal joint 20 can be transmitted to the foundation 4 via the anchor bolt 34. Furthermore, by joining the slit-in plate 30 on the lower side of the joint hardware to the base 3 with the drift pin 31, it is possible to cope with the shearing force acting on the load bearing wall 10. The slit-in plate 30 also has an effect of reinforcing the out-of-plane rigidity of the base plate 21 that transmits the pulling force to the anchor bolt 34 and the base 3. In addition, since the leg joint structure 50 according to the present embodiment is configured to be continuous along the foundation 4 without cutting out the base 3, it is possible to suppress the generation of a heat bridge.

  In the leg joint structure 50 according to the present embodiment, the intermediate member is configured by the base plate 21 that spreads on the upper surface 3a of the base 3 so as to face the upper surface 3a of the base 3, and the upper member is the base plate 21. The lower member is provided on the lower surface 21b side of the base plate 21, and is provided on the lower surface 15b side of the square steel pipe 15, and the lower member is provided on the lower surface 21b side of the base plate 21. It is comprised by the slit in plate 30 arrange | positioned. The bar-shaped member is fixed to the base plate 21 at the upper end portion, extends downward, penetrates the base 3, and is configured by anchor bolts 34 arranged at the lower end portion. The square steel pipe 15 and the fin plate 22 are joined by a shaft member 27 extending in the width direction D1, and the base 3 and the slit in plate 30 are joined by a drift pin 31 extending in the thickness direction D3, and the foundation 4 and the base plate 21 are joined. Are joined via anchor bolts 34. In this way, the fin plate 22 is inserted into the square steel pipe 15 and joined with the shaft member 27, and the slit in plate 30 is placed inside the base 3 and joined with the drift pin 31, and fixed to the base plate 21. A simple structure in which the metal fitting 20 is simply joined to the foundation 4 with the anchor bolt 34 can be obtained. Therefore, even when the square steel pipe 15 is used as the vertical frame member, the leg joint structure 50 can be easily configured without reducing workability.

  Further, in the leg joint structure 50 according to the present embodiment, in the joint hardware 20, the fin plate 22 has a portion (arc portion 22d) formed in an arc shape on the upper side, and the slit in plate 30 is formed on the lower portion. It has the part (arc part 30c) formed in circular arc shape by the side. With such a configuration, when the metal joint 20 is inserted into the square steel pipe 15, the square steel pipe 15 can be inserted while being guided by the arc portion 22d. Thereby, workability | operativity can be improved. Specifically, when the square steel pipe 15 and the joint metal 20 are joined, an operation of inserting the square steel pipe 15 from above is performed on the joint metal 20 joined to the base 3 in advance. At this time, since the beam 2 is provided above the metal joint 20, the operator needs to perform an operation so that the upper end side of the square steel pipe 15 does not interfere with the beam 2. Therefore, the operator inserts the metal joint 20 into the square steel pipe 15 from diagonally above with the square steel pipe 15 tilted obliquely. At this time, since the side edge 22b of the fin plate 22 is formed in an arc shape, the square steel pipe 15 can be smoothly inserted along the arc portion 22d. Further, when the slit-in plate 30 of the metal joint 20 is inserted into the slit portion of the base 3, the slit-in plate 30 can be smoothly inserted by guiding the slit-in plate 30 with respect to the slit portion by the arc portion 30c. As described above, workability can be improved.

  The leg joint structure 50 according to the present embodiment configured as described above is different from the conventional leg joint structure using the eccentric metal fitting because the joint hardware 20 is joined to the inside of the vertical frame member 11. The influence of additional bending can be suppressed. Further, unlike the conventional leg joint structure using an eccentric metal fitting, a rectangular steel pipe 15 having an internal space is used, and the joint hardware 20 is inserted into the square steel pipe 15, so that the cross-sectional defect of the vertical frame member 11 is restricted. Not receive. Moreover, when using the square steel pipe 15 as the vertical frame material 11, there exists a problem that a structure will become complicated depending on the joining method, and work efficiency will fall. However, in the leg joint structure 50 according to the present embodiment, the leg joint structure 50 has a simple structure in which the fin plate 22 is inserted into the square steel pipe 15 and the shaft member 27 is laterally inserted and fixed. Can be configured. Thereby, working efficiency can be improved.

  The present invention is not limited to the embodiment described above. For example, the shape of the metal joint 20 according to the above-described embodiment is merely an example, and can be appropriately changed within the scope of the present invention. Moreover, a pair of fin plate was illustrated as a structure of the part inserted in the inside of the square steel pipe 15 in the metal joint 20. However, any structure may be employed as long as the structure is inserted into the square steel pipe 15 and joined.

[Example]
Hereinafter, the leg joint structure according to one embodiment of the present invention will be specifically described based on examples, but the configuration of the leg joint structure is not limited to the following examples.

  A test model of a bearing wall incorporating the leg joint structure according to the above-described embodiment was created, and a strength test using a loading program was performed. In the test model, a column-and-beam structure with a conventional frame structure is provided, and a pair of vertical frame members are fixed to the basic surface of the structure via a joint hardware, and a panel material is interposed between the vertical frame members. Provided. Moreover, the jack for giving the horizontal force load P was connected to the upper end of a vertical frame material. The fin plate 22 has a thickness of 9.0 mm × width of 68 mm × length of 75 mm, and the base plate 21 has a thickness of 4.5 mm × width of 80 mm × length of 225 mm. The slit-in plate 30 had a thickness of 6.0 mm × width of 86.25 mm × length of 135 mm. Such a vertical frame member and the fin plate 22 were joined by bolts, the base plate 21 was joined by M16 anchor bolts 34, and the base 3 and the slit in plate 30 were joined by a drift pin of φ12 mm × 95 mm. Using a square steel pipe with a plate thickness of 2.3 mm × width 75 mm × formation (depth) 45 mm as the vertical frame material, and using a folded plate panel with a plate thickness of 0.6 mm × width 455 mm × height 2730 mm as the vertical frame material Fixed to.

  As a result of performing an in-plane shear test using the test model (FIG. 5), the maximum proof stress was 15.8 kN, the short-term allowable proof strength was 5.0 kN, and the wall magnification was 5.6. As a comparative example, when compared with a wall set with a wall magnification of 2 of a shaft set with a bracing of 45 mm × 90 mm, this example was 2.8 times the comparative example with a wall length of 1 m. . As a comparative example, this example is 1.4 times that of the comparative example with a wall length of 1 m, as compared with a comparative example with a wall length of 1 m. It became. The load-bearing wall with a wall length of 455 mm in this example had a wall magnification of 1.4 to 2.8 times that of the comparative example with a wall length of 1 m. From the above, it was confirmed that sufficient strength can be obtained by using the leg joint structure of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Column, 2 ... Beam, 3 ... Base, 4 ... Foundation, 10 ... Bearing wall, 11 ... Vertical frame material, 12 ... Panel material, 15 ... Square steel pipe (steel pipe), 20 ... Joint metal fitting, 21 ... Base plate, 22 DESCRIPTION OF SYMBOLS ... Fin plate, 30 ... Slit in plate, 27 ... Shaft member, 34 ... Anchor bolt, 50 ... Leg part joining structure, 100 ... Conventional shaft assembly structure.

Claims (3)

In a conventional frame structure composed of a wooden column, a wooden beam, a wooden base, and a concrete foundation, a proof strength comprising a vertical frame member and a panel member installed in the surface of the column and the beam. A wall leg joint structure,
Between the steel pipe and the base constituting the vertical frame member, a joint hardware is arranged,
The joint hardware is
An intermediate member extending so as to face the upper surface of the base;
On the upper surface side of the intermediate member, an upper member that protrudes upward and extends in the thickness direction of the bearing wall;
A lower member that protrudes downward and extends along the width direction of the load-bearing wall on the lower surface side of the intermediate member,
The joint hardware is
The upper member is joined to the inside of the lower end side of the steel pipe,
Bonded to the base in the lower member,
The said intermediate member is joined to the said foundation through the rod-shaped member extended in an up-down direction, The leg part junction structure characterized by the above-mentioned. The intermediate member is constituted by a base plate that spreads on the upper surface of the base so as to face the upper surface of the base.
The upper member is provided on the upper surface side of the base plate, and is constituted by a pair of fin plates inserted into the lower end side of the steel pipe,
The lower member is provided on the lower surface side of the base plate, and is configured by a slit-in plate disposed inside the base,
The rod-shaped member is fixed to the base plate at an upper end portion, extends downward and penetrates the base, and is configured by an anchor bolt arranged at the foundation at the lower end portion,
The steel pipe and the fin plate are joined by a shaft member extending in the width direction,
The base and the slit in plate are joined with a pin extending in the thickness direction,
The leg joint structure according to claim 1, wherein the foundation and the base plate are joined via the anchor bolt. In the joint hardware,
The upper member has a portion formed in an arc shape on the upper side,
The leg joint structure according to claim 1, wherein the lower member has a portion formed in an arc shape on the lower side.

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