JP2023137922A - Bearing wall and bearing wall frame - Google Patents

Abstract

To provide a bearing wall having high strength, which ensures integrity when being deformed during earthquake and has excellent appearance design, and a bearing wall frame having excellent earthquake resistance.SOLUTION: On a steel frame 10 formed of a pair of steel columns 13 and a pair of steel beams 11, 12, a bearing wall 20 is fitted to the pair of steel beams 11, 12. The bearing wall has a wooden surface member 30, which has rectangular shape or substantially rectangular shape in front view, and a steel plate 40, which is inserted into the wooden surface member 30 from right and left edges to the inside thereof on upper side and lower side of the wooden surface member 30. Wide width surfaces of the wooden surface member 30 and the steel plate 40 are fixed to each other by a first fixing means 50. A flange 45 is disposed on right and left end faces of the steel plate 40. The flange 45 and an end face of the wooden surface member 30 are fixed by a second fixing means 55.SELECTED DRAWING: Figure 1

Description

The present invention relates to a load-bearing wall and a load-bearing wall frame.

A load-bearing wall (load-bearing panel) made of wood facing material is placed inside a frame (steel frame) formed by a pair of steel columns and a pair of steel beams, and Load-bearing wall frames with attached walls may be applied to steel buildings. Wooden facing materials have high shear rigidity and excellent appearance design, making them suitable for application to load-bearing walls. In addition, in order to further increase the rigidity of load-bearing walls, there are also hybrid load-bearing walls that combine wood facings and steel plates.For example, a load-bearing wall with a steel plate sandwiched between wood facings has an excellent appearance. A load-bearing wall frame including load-bearing walls with even higher rigidity while maintaining the design is formed.

Here, Patent Document 1 proposes a load-bearing wall formed of a wooden panel and a steel plate. This load-bearing wall consists of a pair of vertical members placed at intervals in the horizontal direction of the building and extending in the vertical direction of the building, and a pair of vertical members placed at intervals in the vertical direction of the building and extending in the horizontal direction of the building. A frame material having a pair of connecting horizontal members, a wooden face material formed into a plate shape using a wood material, and a board shape formed using a metal material, arranged at intervals in the vertical direction of the building. It has a plurality of openings, and includes a metal panel that is joined to the wooden panel and fixed to the frame material together with the wooden panel. Here, the wide surfaces of the metal surface material (steel plate) and the wooden surface material are joined together with an adhesive, and the wide surfaces of the metal surface material and the frame material are joined together with nails.

Japanese Patent Application Publication No. 2020-117873

In the load-bearing wall described in Patent Document 1, the wide surfaces of the wooden facing material and the steel plate, and the wide surfaces of the steel plate and the frame material (wooden frame material) are joined with adhesive or nails, so that the load-bearing wall is integrated. gender is ensured. In this way, in a structure in which the wide surfaces of laminated members are simply joined together with adhesive or nails, for example, when horizontal force during an earthquake acts on the frame and the frame and load-bearing wall are significantly deformed, There is a risk that the joints of each component may come loose and come apart, making it impossible to function as a load-bearing wall against repeated horizontal forces.

In addition, since the wooden frame material is arranged on one side of the two wide sides of the load-bearing wall, the steel plate is exposed inside the frame material. The appearance design quality of the product will deteriorate.

The present invention has been made in view of the above-mentioned problems, and provides a high-bearing load-bearing wall that ensures the integrity of the wooden panel and steel plate during deformation during an earthquake, has an excellent appearance design, and has excellent earthquake resistance. The purpose of this project is to provide a load-bearing wall structure with a high capacity.

In order to achieve the above object, one aspect of the load-bearing wall according to the present invention is as follows:
In a steel frame formed by a pair of steel columns and a pair of steel beams, a load-bearing wall that is attached to the pair of steel beams,
A wooden face material that is rectangular or approximately rectangular in front view,
A steel plate is inserted above and below the wooden facing material from the left and right ends of the wooden facing material,
The wide surfaces of the wooden face material and the steel plate are fixed to each other by a first fixing means,
A flange is provided on each of the left and right end faces of the steel plate, and the flange and the end face of the wooden face material are fixed by a second fixing means.

According to this aspect, steel plates are inserted above and below the wooden facing material, flanges are provided on the left and right end faces of the steel plate, and the wide surfaces of the wooden facing material and the steel plate are fixed by the first fixing means. Since the end faces of the flange and the wooden panel are fixed by the second fixing means, the wooden panel, the steel plate, and the flange are mutually fixed on two perpendicular surfaces, so even if they are significantly deformed during an earthquake. , it is possible to form a load-bearing wall in which the integrity of the wood facing material and the steel plate is ensured. Furthermore, since the steel plate is inserted into the wooden facing material, the entire steel plate is prevented from being visible from both of the two wide sides of the wooden facing material, making it possible to form a load-bearing wall with excellent external design. .

Here, "steel plates are inserted above and below the wooden panel" means that a groove is provided at the upper end of the wooden panel and steel plates are inserted into both grooves. For example, a steel plate may be sandwiched between the upper and lower sides of two wooden panels. In addition, "the wooden panel is rectangular or approximately rectangular in front view" refers to not only a rectangular or square rectangle in front view, but also a rectangle in which the four corners are tapered, or the corners are It means adding a shape in front view where a notch is provided at a corner, such as a notch cut out, as a substantially rectangular shape. The wooden surface material is formed of, for example, structural plywood. Further, the load-bearing wall may be referred to as a load-bearing panel, a load-bearing wall panel, or the like.

Further, in another aspect of the load-bearing wall according to the present invention,
The steel plate has a U-shape when viewed from the front, and extends downward or upward from the left and right corners of the wooden panel.

According to this aspect, the steel plates have a U-shape when viewed from the front, the upper steel plates extend downward from the left and right corners of the wooden panel, and the lower steel plates extend from the left and right corners of the wooden panel. When a horizontal force during an earthquake acts on a load-bearing wall frame in which the load-bearing wall of this embodiment is incorporated in a steel frame and the entire structure is deformed, the bending moment bearing area (or transfer area) ) The corner areas of load-bearing walls can be reinforced. Further, the upper and lower central regions of the load-bearing wall mainly serve as shear force bearing regions (or transmission regions).

Here, a steel plate having the vertical width required for reinforcing the corner region may be applied, but as in this embodiment, the shape in plan view (U-shaped) necessary for reinforcing the corner region may be applied. ) By applying the steel plate, it is possible to effectively reinforce the corner area that bears the bending moment in the load-bearing wall while suppressing the amount of steel plate used as much as possible.

Further, other aspects of the load-bearing wall according to the present invention include:
The steel plate is characterized in that it is formed of two split steel plates that are L-shaped when viewed from the front.

According to this aspect, since the steel plate is formed of two divided steel plates that are L-shaped when viewed from the front, the ease of attaching the steel plate to the wooden face material is improved.

Further, other aspects of the load-bearing wall according to the present invention include:
the first fixing means is a drift pin;
The second fixing means is a lag screw bolt.

According to this aspect, since the first fixing means for joining the wide surfaces of the wooden panel and the steel plate are drift pins, the head of the load-bearing wall is fixed when viewed from the front while firmly joining both. Drift pins that do not have this are difficult to visually recognize, and only the holes into which the drift pins are inserted are exposed at the front, so the external design of the load-bearing wall is not impaired. In addition, since the second fixing means for joining the left and right end faces of the wooden facing material and the flange is a lag screw bolt, the head of the lag screw bolt is attached to the end face of the wooden facing material while pressing the flange from the outside. It can be firmly connected to the

Here, in a load-bearing wall frame in which the load-bearing wall of this embodiment is incorporated into a steel frame, the upper and lower corner regions of the load-bearing wall bear the above-mentioned bending moment. Since the end faces of the flange and the wood facing material are firmly connected with screw bolts, the integrity of the flange and the end face of the wood facing material is guaranteed even when a bending moment is applied.

Further, other aspects of the load-bearing wall according to the present invention include:
The wooden panel is characterized in that it is a CLT panel or an LVL panel.

According to this aspect, by applying a CLT (Cross Laminated Timber) panel or an LVL (Laminated Veneer Lumber) panel as the wooden facing material, it is possible to form a wooden facing material with high shear resistance and as wide a width as possible.

Further, other aspects of the load-bearing wall according to the present invention include:
An insertion groove is provided at the upper end and lower end of the wooden panel, respectively, and a part of the steel plate is inserted into the insertion groove.

According to this aspect, insertion grooves are provided at the upper and lower ends of the wooden surface material, and a portion of the steel plate is inserted into each insertion groove and mutually connected via the first fixing means and the second fixing means. Because it is fixed, a portion of the steel plate is embedded in the top and bottom ends of a single wooden panel, making it possible to create a load-bearing wall with high rigidity and excellent appearance design without increasing the overall thickness. Can be formed.

Further, other aspects of the load-bearing wall according to the present invention include:
A part of the steel plate is sandwiched above and below the two wooden facings, respectively.

According to this aspect, a portion of the steel plate is sandwiched above and below the two wooden face members, respectively, so that a load-bearing wall with even higher rigidity and excellent appearance design can be formed.

Further, other aspects of the load-bearing wall according to the present invention include:
A notch is provided at a corner of the wooden face material,
A part of the flange protrudes from the notch.

According to this aspect, a notch is provided at the corner of the wooden face material, and a part of the flange protrudes from the notch, so that a gusset plate (hereinafter referred to as a second gusset plate) provided on the steel frame is provided. ) and flanges are bolted together.

Further, one aspect of the load-bearing wall frame according to the present invention is
Other parts of the steel plate constituting the load-bearing wall protrude from the upper and lower ends of the wooden panel,
The other part of the steel plate and the steel beam are bolted together.

According to this aspect, by incorporating the load-bearing wall of the present invention inside the steel frame, it is possible to form a load-bearing wall frame that is excellent in both earthquake resistance and appearance design.

Moreover, in another aspect of the load-bearing wall frame according to the present invention,
A first gusset plate extending parallel to the structural surface of the steel frame and a second gusset plate joined to an end of the first gusset plate and extending in a direction perpendicular to the structural surface are attached to the steel beam. and
the first gusset plate and the other portion of the steel plate are bolted together;
The second gusset plate and the flange may be bolted together.

According to this aspect, the other part of the steel plate constituting the load-bearing wall is bolted to the first gusset plate that extends parallel to the structural surface of the steel frame provided on the steel beam, and the end of the first gusset plate The flanges provided on the left and right end faces of the steel plate are bolted to the second gusset plate, which is joined to the second gusset plate and extends in a direction perpendicular to the structural surface. A load-bearing wall frame is formed which is firmly connected by a plurality of bolts extending from one side to the other. Here, it is preferable for the bolt connection to be performed using high-strength bolts.

Further, other aspects of the load-bearing wall frame according to the present invention include:
The first gusset plate and the other part of the steel plate are joined by one-sided friction welding using high-strength bolts,
The second gusset plate and the flange are joined by one-sided friction welding or two-sided friction welding using high-strength bolts.

According to this aspect, the first gusset plate and the other part of the steel plate are joined by one-sided friction bonding using high-strength bolts, so that it is possible to transmit the shear force that occurs when the load-bearing wall frame deforms during an earthquake. Steel beams and other parts of steel plates can be joined. In addition, because the second gusset plate and the flange are joined by one-sided friction welding or two-sided friction welding using high-strength bolts, the bending moment that occurs when the load-bearing wall structure deforms during an earthquake can be transmitted to the steel beam. and flanges provided on steel plates can be joined.

Moreover, in another aspect of the load-bearing wall frame according to the present invention,
At least one of the pair of steel beams is provided with advance yielding means for yielding the steel beam earlier than the load-bearing wall.

According to this aspect, at least one of the pair of steel beams is provided with a prior yielding means for yielding the steel beam before the load-bearing wall, so that the rigidity of the load-bearing wall is maintained even during an earthquake. , it is possible to form a load-bearing wall frame with excellent seismic performance.

Here, examples of the advance yielding means include holes for cross-section defects provided in the web of the steel frame, and the like.

As can be understood from the above explanation, according to the load-bearing wall and load-bearing wall frame of the present invention, the integrity of the wooden face material and the steel plate during deformation during an earthquake is ensured, and a high-bearing strength structure with excellent appearance design is achieved. It is possible to provide a load-bearing wall and a load-bearing wall frame with excellent earthquake resistance.

It is a front view of an example of a load-bearing wall frame concerning an embodiment. FIG. 2 is a side view of an example of the load-bearing wall frame according to the embodiment; FIG. It is a front view of an example of a steel frame which forms a load-bearing wall frame concerning an embodiment. It is a side view of an example of a steel frame, and is a view taken in the direction of arrow IV in FIG. 3. It is a front view of an example of a load-bearing wall concerning an embodiment. FIG. 6 is a side view of an example of the load-bearing wall according to the embodiment, which is a view taken in the direction of arrow VI in FIG. 5; FIG. 7 is a front view of another example of the load-bearing wall according to the embodiment. (a) is a diagram showing an example of a pre-yield means provided on a steel beam of a steel frame, and (b) is a diagram showing another example of a pre-yield means provided on a steel beam of a steel frame. It is a diagram.

Hereinafter, an example of a load-bearing wall frame and a load-bearing wall according to an embodiment will be described with reference to the accompanying drawings. Note that in this specification and the drawings, substantially the same constituent elements may be given the same reference numerals to omit redundant explanation.

[Load-bearing wall frame and load-bearing wall according to embodiment]
An example of a load-bearing wall frame and a load-bearing wall according to an embodiment will be described with reference to FIGS. 1 to 8. Here, FIG. 1 is a front view of an example of the load-bearing wall frame according to the embodiment, and FIG. 2 is a side view of the example of the load-bearing wall frame according to the embodiment, which is a view taken in the II direction of FIG. 1. It is. Further, FIG. 3 is a front view of an example of a steel frame forming the load-bearing wall frame according to the embodiment, and FIG. 4 is a side view of an example of the steel frame, taken in the direction of arrow IV in FIG. It is. Furthermore, FIG. 5 is a front view of an example of the load-bearing wall according to the embodiment, and FIG. 6 is a side view of the example of the load-bearing wall according to the embodiment, which is a view taken in the direction of arrow VI in FIG. 5.

The load-bearing wall frame 70 is formed by attaching the load-bearing wall 20 to the pair of steel beams 11 and 12 in the steel frame 10 formed by a pair of steel columns 13 and a pair of steel beams 11 and 12. Ru. Here, the steel beam 11 in the illustrated example is a beam between the first and second floors, and the steel beam 12 is a beam forming a foundation, but a pair of steel beams is a beam on an upper floor (for example, three beams on the first floor and the second floor), etc.

The steel column 13 and the steel beams 11 and 12 in the illustrated example are both formed of H-shaped steel. Here, the steel column may be formed of, for example, a square steel pipe.

A plurality of (three in the illustrated example) cross-sectional defect holes 18 are provided in the webs 11a, 12a of the upper and lower steel beams 11, 12. This cross-section defect hole 18 is formed by a repeated horizontal force H acting on the load-bearing wall frame 70 during an earthquake, so that the load-bearing wall frame 70, which is rectangular in front view, becomes a parallelogram (or approximately parallelogram) in front view from side to side. This is an example of a prior yielding means for yielding a part of the steel frame 10 prior to the load-bearing wall 20 when the steel frame 10 is repeatedly deformed.

As shown in FIGS. 3 and 4, the lower surface of the lower flange 11c of the upper steel beam 11 and the upper surface of the upper flange 12b of the lower steel beam 12 each have a first groove extending parallel to the structural surface of the steel frame 10. A gusset plate 15 is welded and joined. A plurality of bolt holes 17 are formed in the first gusset plate 15 .

A second gusset plate 16 orthogonal to the first gusset plate 15 is welded to the left and right ends of the first gusset plate 15 . A plurality of bolt holes 17 are also formed in the second gusset plate 16.

Reinforcing ribs 11d and 12d are provided at positions corresponding to the second gusset plate 16 on both side surfaces of the webs 11a and 12a of the steel beams 11 and 12, respectively.

As shown in FIG. 1, a load-bearing wall 20 (load-bearing wall panel) having a substantially rectangular shape in front view is friction-bonded to the upper and lower first gusset plates 15 via high-strength bolts 60. , a load-bearing wall frame 70 having a steel frame 10 and a load-bearing wall 20 is formed.

As shown in FIGS. 5 and 6, the load-bearing wall 20 includes a wooden panel 30 having a substantially rectangular shape in front view (the shape of the wide surface 31), and a space between the left and right sides of the wooden panel 30 above and below the wooden panel 30. It has a steel plate 40 inserted from the side end surface 32 to the inside thereof. More specifically, an insertion groove 35 having a U-shape when viewed from the front is provided at the center of the upper end surface 33 of the wooden panel 30 from the left end to the right end. An insertion groove 36 having a U-shape when viewed from the front is provided at the center of the groove 34 from the left end to the right end. A portion of the steel plate 40, which is U-shaped in front view, is inserted into each of the insertion grooves 35 and 36.

A CLT panel or an LVL panel is applied to the wooden surface material 30. By applying these panels, it is possible to form a wooden panel with high shear resistance and as wide a width as possible.

For example, in the case of CLT panels, a wide range of panels with vertical and horizontal dimensions of up to 12 m x 2.6 m can be applied. Moreover, since a plurality of plate materials are laminated in such a manner that the fiber directions are crossed (orthogonal), the CLT panel is particularly resistant to deformation and is suitable as a structural member of a load-bearing wall.

Similarly, a part of the steel plate 40, which has a U-shape when viewed from the front and has a larger width in the vertical direction than the insertion grooves 35 and 36, is inserted into the insertion grooves 35 and 36, which are U-shaped when viewed from the front. The other portion of the steel plate 40 protrudes upward and downward from the upper end surface 33 and lower end surface 34 of the wooden panel 30.

A plurality of pin holes 37 are opened in the wide side 31 of the wooden face material 30 at positions corresponding to the insertion grooves 35 and 36, and a portion of the steel plate 40 inserted into the insertion grooves 35 and 36 is provided. A pin hole (not shown) is also opened at a position corresponding to the pin hole 37 in , and a part of the steel plate 40 is inserted into the insertion grooves 35 and 36, so that the corresponding pin hole 37 and the pin of the steel plate 40 are inserted. The holes are aligned to form communication holes, and the drift pins 50 (an example of the first fixing means) are inserted into each communication hole, so that the wide surfaces of both the wooden panel 30 and the steel plate 40 are connected to each other. Joined.

Furthermore, steel flanges 45 are welded to the left and right end surfaces of the steel plate 40, respectively. When the steel plate 40 is inserted into the insertion grooves 35 and 36 of the wooden panel 30, the left and right flanges 45 come into contact with a portion of the left and right side end surfaces 32 of the wooden panel 30.

A plurality of bolt holes 38 are formed in the left and right side end surfaces 32 of the wooden panel 30. Further, the flange 45 also has a plurality of bolt holes 46 formed therein.

When the steel plate 40 is inserted into the insertion grooves 35 and 36 of the wooden panel 30 and the left and right flanges 45 are in contact with a portion of the left and right side end surfaces 32 of the wooden panel 30, the corresponding bolt holes of both 38 and 46 are aligned, the bolt holes 38 and 46 are aligned to form a communication hole, and a lag screw bolt 55 (an example of the second fixing means) is driven into the communication hole. As a result, while the flange 45 is pressed against the head of the lag screw bolt 55, the flange and the left and right side end surfaces 32 of the wooden face material 30 are firmly fixed.

When the steel plate 40 is fixed to the wooden panel 30, the upper and lower parts of the steel plate 40 extend vertically from the upper end surface 33 and the lower end surface 34 of the wooden panel 30, and , a plurality of bolt holes 42 are opened.

In this way, a part of the steel plate 40 is inserted into the upper and lower insertion grooves 35 and 36 of the wooden facing material 30, and both wide surfaces are fixed by the drift pins 50, and the wooden facing material 30 is By fixing the left and right side end surfaces 32 and the flanges 45 provided at the left and right ends of the steel plate 40 with lag screw bolts 55, the load-bearing wall 20 having the wooden face material 30 and the upper and lower steel plates 40 is formed.

As shown in FIG. 5, cutouts 39 are provided at the corners of the wooden face material 30. As described above, since the notches 39 are provided at the four corners of the wooden facing material 30, the front view shape of the wooden facing material 30 has a substantially rectangular shape (a shape in which a rectangular corner is missing). ing. A portion of the flange 45 at the left and right ends of the steel plate 40 protrudes from the notch 39 .

As shown in FIG. 1, the other parts of the steel plate 40 that protrude upward and downward from the upper and lower ends of the wooden facing material 30 are aligned with the first gusset plate 15 that protrudes into the structural surface from the upper and lower steel beams 11 and 12. At this time, the corresponding bolt holes 42 and 17 form a communication hole, and by inserting the high-strength bolt 60 into the communication hole, the first gusset plate 15 and the other part of the steel plate 40 are friction-bonded on one side. be done.

On the other hand, a plurality of bolt holes 17 are also formed in the pair of second gusset plates 16 welded to the left and right ends of the first gusset plate 15, and when the second gusset plate 16 and the flange 45 are in contact with each other, , corresponding corresponding bolt holes 17, 46 are aligned to form a communicating hole. With the second gusset plate 16 and the flange 45 sandwiched between the pair of splint plates 65, the high-strength bolts 60 are inserted into the communication holes, whereby the second gusset plate 16 and the flange 45 are joined by two-sided friction.

Here, the second gusset plate 16 and the flange 45 may be joined by one-sided friction welding.

By the way, in the form in which the second gusset plate 16 and the flange 45 are friction-bonded on one side, the load-bearing wall 20 is attached to the inside of the pair of left and right second gusset plates 16 that protrude downward and upward from the steel beams 11 and 12, respectively. The flanges 45 at the left and right ends are aligned, and the corresponding second gusset plates 16 and flanges 45 are joined by high-strength bolts 60. At this time, the width between the left and right second gusset plates 16 is set so that the load-bearing wall 20 can be disposed between the left and right second gusset plates 16 without interference between the second gusset plate 16 and the flange 45. It is also preferable to process or manufacture both the left and right flanges 45 so that the width between them is small, but in this case, a gap may occur between the corresponding second gusset plate 16 and the flange 45.

If there is a gap between the flange 45 and the second gusset plate 16 as described above, insert a filler plate or the like between the two to close the gap, and then attach the high-strength bolt 60 to the second gusset plate 16. The flange 45 may be joined to the flange 45.

On the other hand, in the case where the second gusset plate 16 and the flange 45 are friction-bonded on two sides as in the illustrated example, even if there is a gap between the flange 45 and the second gusset plate 16, the pair of splint plates By performing two-sided friction welding by sandwiching the flange 45 and the second gusset plate 16 at 65, it becomes possible to perform bolt joining while absorbing a gap of, for example, about 1 mm to several mm. For this reason, it is preferable to join the flange 45 and the second gusset plate 16 by two-sided friction welding, not only because the joining strength is increased but also because of workability.

Further, by providing the notches 39 at the corners of the wooden face material 30, the second gusset plate 16 and the flange 45 can be joined well. If the corner portions of the wooden face material remain as they are, it will be difficult to join the second gusset plate 16 and the flange 45 with bolts.

As shown in FIG. 1, when the load-bearing wall frame 70 is deformed from side to side due to the horizontal force H during an earthquake, a bending moment and a shear force are generated in the load-bearing wall frame 70.

In the load-bearing wall frame 70, the corner area of the load-bearing wall 20 is the bending load area MA (or bending transfer area), and the upper and lower central areas of the load-bearing wall 20 are the shear force bearing area SA (or shear force transfer area). area).

In this way, based on the design concept of bearing the bending moment on the corner area of the load-bearing wall 20, the steel plates 40, which are U-shaped in front view, are inserted into the upper and lower end surfaces of the wooden facing material 30, and the left and right sides of the wooden facing material 30 are The side end surfaces 32 of the steel plate 40 are covered with flanges 45 provided at the left and right ends of the steel plate 40, and are firmly fixed with lag screw bolts 55.

With this structure, even if a bending moment occurs in the corner area of the load-bearing wall 20 during a major earthquake, for example, the integrity of the steel plate 40 (and flange 45) and the side end surface 32 of the wooden panel 30 is ensured, and the load-bearing The seismic performance of the wall 20 is fully exhibited.

In addition, in the load-bearing wall 20, by applying the steel plate 40 having a U-shape in front view, the area of the steel plate can be made as small as possible compared to, for example, a steel plate having a rectangular shape in front view, and the corners of the load-bearing wall 20 can be Since the region can be reinforced over a wide range, a highly rigid load-bearing wall 20 can be formed while suppressing material costs.

Furthermore, since the steel plate 40 is inserted into the wooden facing material 30, the entire steel plate 40 is prevented from being visible from both of the two wide surfaces 31 of the wooden facing material 30, resulting in an excellent appearance and design. A load-bearing wall 20 can be formed.

Here, in the illustrated example, a part of the steel plate 40 is inserted into the insertion grooves 35 and 36 provided on the upper and lower end surfaces of the wooden facing material 30. A portion of the steel plate may be held between the upper and lower portions (not shown). According to the load-bearing wall 20 in the illustrated example, a portion of the steel plate 40 is inserted into the insertion grooves 35 and 36 provided within the thickness of one wooden panel 30, so that the load-bearing wall 20 There is an advantage that a hybrid structure of the wooden face material 30 and the steel plate 40 can be formed without increasing the thickness. On the other hand, in a configuration in which a part of the steel plate is sandwiched between two wooden facing materials, although the thickness of the load-bearing wall becomes thicker, there is an advantage that the overall rigidity of the load-bearing wall can be further increased.

Next, with reference to FIG. 7, another example of the load-bearing wall according to the embodiment will be described. Here, FIG. 7 is a front view and a side view of another example of the load-bearing wall according to the embodiment.

In the load-bearing wall 20A shown in FIG. 7, split steel plates 40A each having an L-shape in front view are inserted into the upper and lower insertion grooves 35 and 36 of the wooden panel 30, forming a U-shaped steel plate in the front view as a whole. This is the form in which it is carried out.

In this way, in the load-bearing wall 20A having the two divided steel plates 40A, the handling and installation of the divided steel plates 40A is better than in the steel plate 40 with twice the size, and the workability of the load-bearing wall 20A is even better. .

FIGS. 8(a) and 8(b) show an example of advance yielding means provided in a steel beam of a steel frame.

The example shown in FIG. 8(a) is an enlarged view of the advance yielding means shown in FIG. This is the hole 18.

On the other hand, the example shown in FIG. 8(b) is a cutout 19 for cross-sectional defects provided in the upper flange 11b and lower flange 11c of the steel beam 11. This cross-sectional cutout 19 is also called a dog bone.

Regardless of which pre-yielding means is applied to the steel beams 11 and 12, by yielding the steel beams 11 and 12 in advance of the load-bearing wall 20, a load-bearing wall frame 70 with high toughness is formed. can do.

It should be noted that other embodiments may be adopted in which other components are combined with the configurations listed in the above embodiments, and the present invention is not limited to the configurations shown here. In this regard, changes can be made without departing from the spirit of the present invention, and can be appropriately determined depending on the application form.

10: Steel frame 11: Steel beam 11a: Web 11b: Upper flange 11c: Lower flange 11d: Reinforcement rib 12: Steel beam (base)
12a: Web 12b: Upper flange 12d: Reinforcement rib 13: Steel column 15: First gusset plate 16: Second gusset plate 17: Bolt hole 18: Hole for cross-section defect 19: (Notch for cross-section defect) Dog bone 20, 20A: Load-bearing wall 30: Wooden surface material 31: Wide surface 32: Side end surface 33: Top end surface 34: Bottom end surface 35, 36: Insertion groove 37: Pin hole 38: Bolt hole 39: Notch 40: Steel plate 42: Bolt Hole 40A: Split steel plate 45: Flange 46: Bolt hole 50: Drift pin (first fixing means)
55: Lag screw bolt (second fixing means)
60: High strength bolt 65: Splint 70: Load-bearing wall frame H: Horizontal force MA: Bending load area SA: Shear load area

Claims (12)

In a steel frame formed by a pair of steel columns and a pair of steel beams, a load-bearing wall that is attached to the pair of steel beams,
A wooden face material that is rectangular or approximately rectangular in front view,
A steel plate is inserted above and below the wooden facing material from the left and right ends of the wooden facing material,
The wide surfaces of the wooden face material and the steel plate are fixed to each other by a first fixing means,
A load-bearing wall characterized in that flanges are provided on the left and right end faces of the steel plate, and the flanges and the end faces of the wood facing material are fixed by second fixing means. The load-bearing wall according to claim 1, wherein the steel plate has a U-shape when viewed from the front and extends downward or upward from the left and right corners of the wooden panel. The load-bearing wall according to claim 1 or 2, wherein the steel plate is formed of two split steel plates that are L-shaped when viewed from the front. the first fixing means is a drift pin;
Load-bearing wall according to any one of claims 1 to 3, characterized in that the second fixing means are lag screw bolts. The load-bearing wall according to any one of claims 1 to 4, wherein the wooden facing material is a CLT panel or an LVL panel. Any one of claims 1 to 5, wherein an insertion groove is provided at an upper end and a lower end of the wooden panel, and a part of the steel plate is inserted into the insertion groove. Load-bearing walls as described in Section. The load-bearing wall according to any one of claims 1 to 5, wherein a portion of the steel plate is sandwiched above and below the two wooden facings, respectively. A notch is provided at a corner of the wooden face material,
The load-bearing wall according to any one of claims 1 to 7, wherein a portion of the flange protrudes into the notch. The other portion of the steel plate constituting the load-bearing wall according to any one of claims 1 to 8 overhangs from the upper and lower ends of the wooden panel,
A load-bearing wall structure, characterized in that the other portion of the steel plate and the steel beam are bolted together. A first gusset plate extending parallel to the structural surface of the steel frame and a second gusset plate joined to an end of the first gusset plate and extending in a direction perpendicular to the structural surface are attached to the steel beam. and
the first gusset plate and the other portion of the steel plate are bolted together;
The load-bearing wall frame according to claim 9, wherein the second gusset plate and the flange are bolted together. The first gusset plate and the other part of the steel plate are joined by one-sided friction welding using high-strength bolts,
11. The load-bearing wall frame according to claim 10, wherein the second gusset plate and the flange are joined by one-sided friction welding or two-sided friction welding using high-strength bolts. According to any one of claims 9 to 11, wherein at least one of the pair of steel beams is provided with advance yielding means for causing the steel beam to yield earlier than the load-bearing wall. Load-bearing wall frame as described.

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