Endurance walls and endurance wall structures

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

[Technical Field]

[0001] The present invention relates to a bearing wall and a bearing wall frame. [Background technology]

[0002] A shear wall frame, in which a shear wall (shear panel) made of wood paneling is placed inside a frame (steel frame) formed by a pair of steel columns and a pair of steel beams, and the wooden shear wall is attached to the pair of steel beams, is sometimes applied to steel-frame buildings. Wood paneling has high shear rigidity and excellent exterior design, making it suitable for use as a shear wall. To further increase the rigidity of the shear wall, there are also hybrid shear walls that combine wood paneling with steel plates. For example, a shear wall in which steel plates are sandwiched between wood paneling forms a shear wall frame with a shear wall that has even greater rigidity while maintaining excellent exterior design.

[0003] Patent Document 1 proposes a bearing wall made of wood paneling and steel plates. This bearing wall includes a frame having a pair of vertical members spaced apart in the horizontal direction of the building and extending in the vertical direction of the building, and a pair of horizontal members spaced apart in the vertical direction of the building and connecting the pair of vertical members in the horizontal direction of the building; a wood paneling formed into a board shape using a wood material; and a metal paneling formed into a board shape using a metal material, having a plurality of openings spaced apart in the vertical direction of the building, and fixed to the frame together with the wood paneling while being joined to the wood paneling. Here, the metal paneling (steel paneling) and the wood paneling are joined at their wide surfaces with an adhesive, and the metal paneling and the frame are joined at their wide surfaces with nails. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-117873 Summary of the Invention [Problem to be solved by the invention]

[0005] In the shear wall described in Patent Document 1, the integrity of the shear wall is ensured by joining the wide surfaces of the wooden paneling and steel plates, and the wide surfaces of the steel plates and frame material (wooden frame material) with adhesive or nails. In a structure in which the wide surfaces of laminated members are simply joined with adhesive or nails, for example, when a horizontal force during an earthquake acts on the frame and the shear wall, causing significant deformation, the joints of the constituent members may come loose and fall apart, causing the wall to no longer function as a shear wall against repeated horizontal forces.

[0006] Furthermore, since a wooden frame is arranged on one of the two wide sides of the bearing wall, steel plates are exposed on the inside of the frame, which reduces the aesthetic appeal of one of the wide sides of the bearing wall.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a high-strength bearing wall with excellent external design and a bearing wall frame with excellent earthquake resistance, which ensures the integrity of the wooden panel and steel plate during deformation during an earthquake. [Means for solving the problem]

[0008] In order to achieve the above object, one aspect of the shear wall according to the present invention is as follows: A steel frame structure formed by a pair of steel columns and a pair of steel beams, comprising a load-bearing wall attached to the pair of steel beams, A wooden surface material that is rectangular or approximately rectangular when viewed from the front, Steel plates are inserted above and below the wooden surface material from the left and right ends to the inside of the wooden surface material, The wide surfaces of the wood surface material and the steel plate are fixed together by a first fixing means, The steel plate has flanges on the left and right end faces, respectively, and the flanges and the end faces of the wood panel are fixed by second fixing means.

[0009] According to this aspect, steel plates are inserted above and below the wooden panel, flanges are provided on the left and right end faces of the steel plates, the wide faces of the wooden panel and the steel plates are fixed to each other by a first fixing means, and the flanges are fixed to the end faces of the wooden panel by a second fixing means. This allows the wooden panel, steel plate, and flange to be fixed to each other on two perpendicular faces, thereby forming a bearing wall in which the integrity of the wooden panel and steel plate is ensured even if the panel is significantly deformed during an earthquake. Furthermore, because the steel plates are inserted into the wooden panel, the entire steel plate is not visible from either of the two wide faces of the wooden panel, allowing for the formation of a bearing wall with excellent external design.

[0010] Here, "steel plates are inserted above and below the wooden panel" refers to a configuration in which grooves are formed at the upper end of the wooden panel and steel plates are inserted into both grooves, or a configuration in which steel plates are sandwiched between two wooden panels, one above the other, or the other. Furthermore, "wood paneling is rectangular or approximately rectangular in front view" refers to a rectangular or square front view, as well as a front view with cutouts at the corners, such as a rectangular shape with tapered corners or corners that are recessed. The wooden paneling is formed from, for example, structural plywood. Furthermore, a bearing wall may also be referred to as a bearing panel, a bearing wall panel, or the like.

[0011] In another aspect of the shear wall according to the present invention, The steel plate is U-shaped when viewed from the front, and extends downward or upward from the left and right corners of the wooden surface material.

[0012] According to this aspect, the steel plates are U-shaped when viewed from the front, with the upper steel plates extending downward from the left and right corners of the wooden panel, and the lower steel plates extending upward from the left and right corners of the wooden panel. This makes it possible to reinforce the corner areas of the bearing wall, which become the bearing area (or transmission area) of the bending moment when a horizontal force during an earthquake acts on a bearing wall frame in which the bearing wall of this aspect is incorporated into a steel frame and the entire frame is deformed. In addition, the central areas at the top and bottom of the bearing wall become the bearing area (or transmission area) of the shear force mainly.

[0013] Here, steel plates with the vertical width required to reinforce the corner area may be applied, but by applying steel plates with a planar shape (U-shaped) required to reinforce the corner area as in this embodiment, it is possible to effectively reinforce the corner area, which is the area in the shear wall that bears the bending moment, while minimizing the amount of steel plate used.

[0014] Another aspect of the bearing wall according to the present invention is as follows: The steel plate is characterized in that it is formed of two divided steel plates that are L-shaped when viewed from the front.

[0015] According to this aspect, the steel plate is formed of two divided steel plates that are L-shaped when viewed from the front, which improves the ease of attachment of the steel plate to the wood panel.

[0016] Another aspect of the bearing wall according to the present invention is as follows: the first fixing means is a drift pin, The second fixing means is a lag screw bolt.

[0017] According to this aspect, the first fixing means for joining the wide surfaces of the wood panel and the steel plate are drift pins, which firmly join the two together, and the drift pins, which have no heads, are difficult to see when the bearing wall is viewed from the front, and only the holes through which the drift pins are inserted are exposed on the front, so the external design of the bearing wall is not impaired. Also, the second fixing means for joining the left and right end faces of the wood panel to the flanges are lag screw bolts, so that the heads of the lag screw bolts press down on the flanges from the outside, firmly connecting them to the end faces of the wood panel.

[0018] Here, in a shear wall frame in which a shear wall of this type is incorporated into a steel frame structure, the upper and lower corner areas of the shear wall are the areas that bear the bending moment described above, and since the flange and the end face of the wooden panel are firmly joined in the corner area with lag screw bolts, the integrity of the flange and the end face of the wooden panel is guaranteed even when a bending moment is applied.

[0019] Another aspect of the bearing wall according to the present invention is as follows: The wooden surface material is a CLT panel or an LVL panel.

[0020] According to this embodiment, by applying a CLT (Cross Laminated Timber) panel or an LVL (Laminated Veneer Lumber) panel as the wooden surface material, it is possible to form a wooden surface material that has high shear strength and is as wide as possible.

[0021] Another aspect of the bearing wall according to the present invention is as follows: The wooden panel is characterized in that an insertion groove is provided at each of the upper and lower ends, and a part of the steel plate is inserted into the insertion groove.

[0022] According to this embodiment, an insertion groove is provided at each of the upper and lower ends of the wooden panel, and a portion of a steel plate is inserted into each insertion groove and fixed to each other via a first fixing means and a second fixing means.As a result, a portion of the steel plate is embedded at the upper and lower ends of a single wooden panel, and a load-bearing wall with high rigidity and excellent external design can be formed without increasing the overall thickness.

[0023] Another aspect of the bearing wall according to the present invention is as follows: A portion of the steel plate is sandwiched above and below each of the two wooden panel materials.

[0024] According to this embodiment, by sandwiching a portion of the steel plate above and below each of the two wooden panelings, it is possible to form a bearing wall that is even more rigid and has an excellent external design.

[0025] Another aspect of the bearing wall according to the present invention is as follows: A notch is provided at the corner of the wood surface material, A part of the flange protrudes into the notch.

[0026] According to this embodiment, a notch is provided at the corner of the wooden panel, and a portion of the flange protrudes into the notch, which improves the ease of attachment when bolting the flange to a gusset plate (hereinafter referred to as the second gusset plate) provided on the steel frame structure.

[0027] Furthermore, one aspect of the shear wall frame according to the present invention is as follows: Other parts of the steel plates constituting the bearing wall protrude from the upper and lower ends of the wooden surface material, The other part of the steel plate and the steel beam are connected by bolts.

[0028] According to this aspect, by incorporating the shear wall of the present invention inside a steel frame structure, it is possible to form a shear wall frame that is excellent in both earthquake resistance and external design.

[0029] In another aspect of the shear 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, The first gusset plate and another portion of the steel plate are bolted together, The second gusset plate and the flange are connected by bolts.

[0030] According to this aspect, the other parts of the steel plates constituting the shear wall are bolted to the first gusset plates that extend parallel to the structural plane of the steel frame attached to the steel beams, and flanges provided on the left and right end faces of the steel plates are bolted to second gusset plates that are joined to the ends of the first gusset plates and extend in a direction perpendicular to the structural plane, thereby forming a shear wall frame in which the steel beams and the shear wall are firmly joined by a plurality of bolts extending in two orthogonal directions.Here, the bolt joints are preferably joined with high-strength bolts.

[0031] Another aspect of the shear wall frame according to the present invention is as follows: the first gusset plate and the other part of the steel plate are joined by a single-face friction joint using a high-strength bolt, The second gusset plate and the flange are joined by one-side friction welding or two-side friction welding using high-strength bolts.

[0032] According to this aspect, the first gusset plate and the other part of the steel plate are joined by a single-face friction joint with high-strength bolts, so that the steel beam and the other part of the steel plate can be joined in a manner that allows the shear force that occurs when the shear wall frame deforms during an earthquake to be transmitted. Also, the second gusset plate and the flange are joined by a single-face or double-face friction joint with high-strength bolts, so that the steel beam and the flange on the steel plate can be joined in a manner that allows the bending moment that occurs when the shear wall frame deforms during an earthquake to be transmitted.

[0033] In another aspect of the shear wall frame according to the present invention, At least one of the pair of steel beams is provided with a pre-yielding means for causing the steel beam to yield before the bearing wall.

[0034] According to this aspect, at least one of the pair of steel beams is provided with a pre-yielding means for causing the steel beam to yield before the shear wall, thereby enabling the formation of a shear wall frame with excellent seismic resistance, in which the rigidity of the shear wall is maintained even during an earthquake.

[0035] Here, examples of the pre-yielding means include holes for cross-section defects provided in the webs of steel frames. [Effects of the Invention]

[0036] As can be understood from the above explanation, the shear wall and shear wall frame of the present invention ensure the integrity of the wooden panel and steel plate during deformation during an earthquake, and can provide a high-strength shear wall with excellent external design and a shear wall frame with excellent earthquake resistance. [Brief explanation of the drawings]

[0037] [Figure 1] FIG. 1 is a front view of an example of a bearing wall frame according to an embodiment. [Figure 2] 2 is a view taken in the direction of the arrow II in FIG. 1, and is a side view of an example of a bearing wall frame according to an embodiment. FIG. [Figure 3] FIG. 1 is a front view of an example of a steel frame structure that forms a load-bearing wall frame according to an embodiment. [Figure 4] 4 is a view taken in the direction of an arrow IV in FIG. 3, and is a side view of an example of a steel frame structure. [Figure 5] FIG. 2 is a front view of an example of a bearing wall according to an embodiment. [Figure 6] 6 is a view taken in the direction of an arrow VI in FIG. 5, and is a side view of an example of a bearing wall according to the embodiment. [Figure 7] FIG. 10 is a front view of another example of a bearing wall according to an embodiment. [Figure 8] FIG. 1(a) is a diagram showing an example of a pre-yielding means provided on a steel beam of a steel frame structure, and FIG. 1(b) is a diagram showing another example of a pre-yielding means provided on a steel beam of a steel frame structure. DETAILED DESCRIPTION OF THE INVENTION

[0038] Hereinafter, an example of a shear wall frame and a shear wall according to an embodiment will be described with reference to the accompanying drawings. In this specification and drawings, substantially identical components will be designated by the same reference numerals, and redundant explanations may be omitted.

[0039] [Shear wall frame and shear wall according to the embodiment] An example of a shear-wall frame and a shear wall according to an embodiment will be described with reference to Figs. 1 to 8. Fig. 1 is a front view of an example of a shear-wall frame according to an embodiment, and Fig. 2 is a side view of an example of a shear-wall frame according to an embodiment, taken in the direction of an arrow II in Fig. 1. Fig. 3 is a front view of an example of a steel frame frame forming the shear-wall frame according to an embodiment, and Fig. 4 is a side view of an example of a steel frame frame, taken in the direction of an arrow IV in Fig. 3. Fig. 5 is a front view of an example of a shear wall according to an embodiment, and Fig. 6 is a side view of an example of a shear wall according to an embodiment, taken in the direction of an arrow VI in Fig. 5.

[0040] The load-bearing wall frame 70 is formed by attaching a load-bearing wall 20 to a pair of steel beams 11, 12 in a steel frame 10 formed by a pair of steel columns 13 and a pair of steel beams 11, 12. 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 that forms the foundation, but the pair of steel beams may also be beams on a higher floor (for example, beams between the third and second floors).

[0041] The steel column 13 and the steel beams 11, 12 in the illustrated example are all formed of H-shaped steel. Here, the steel column may be formed of, for example, a square steel pipe.

[0042] A plurality of (three in the illustrated example) cross-section loss holes 18 are provided in the webs 11a, 12a of the upper and lower steel beams 11, 12. These cross-section loss holes 18 are an example of a pre-yielding means for causing a portion of the steel frame 10 to yield before the shear wall 20 when, during an earthquake, repeated horizontal forces H act on the shear wall frame 70 and the shear wall frame 70, which is rectangular in front view, is repeatedly deformed left and right into a parallelogram (or an approximate parallelogram) in front view.

[0043] 3 and 4, a first gusset plate 15 extending parallel to the structural surface of the steel frame 10 is welded to the underside of the bottom flange 11c of the upper steel beam 11 and to the top surface of the top flange 12b of the lower steel beam 12. The first gusset plate 15 has a plurality of bolt holes 17 formed therein.

[0044] Second gusset plates 16 are welded to the left and right ends of the first gusset plate 15 so as to be perpendicular to the first gusset plate 15. The second gusset plate 16 also has a plurality of bolt holes 17 formed therein.

[0045] Reinforcing ribs 11d and 12d are provided on both side surfaces of the webs 11a and 12a of the steel beams 11 and 12 at positions corresponding to the second gusset plates 16.

[0046] As shown in Figure 1, a shear wall 20 (shear wall panel) that is approximately rectangular (nearly oblong) when viewed from the front is friction-joined on one side to the upper and lower first gusset plates 15 via high-strength bolts 60, thereby forming a shear wall frame 70 having a steel frame 10 and the shear wall 20.

[0047] 5 and 6, the bearing wall 20 has a wooden panel 30 that has a substantially rectangular shape in front view (the shape of the wide surface 31), and steel plates 40 that are inserted from the left and right side end faces 32 of the wooden panel 30 to the inside above and below the wooden panel 30. More specifically, an internal groove 35 that is U-shaped in front view is provided in the center of the upper end face 33 of the wooden panel 30, stretching from the left end to the right end, and an internal groove 36 that is U-shaped in front view is provided in the center of the lower end face 34 of the wooden panel 30, stretching from the left end to the right end. A portion of a steel plate 40 that is U-shaped in front view is inserted into each of the internal grooves 35, 36.

[0048] CLT panels or LVL panels are used for the wooden surface material 30. By using these panels, it is possible to form a wooden surface material with high shear strength and as wide a width as possible.

[0049] For example, CLT panels can be applied to a wide range of panels with dimensions up to 12m x 2.6m. In addition, because CLT panels are made by stacking multiple boards with their fibers crossed (orthogonal), they are particularly resistant to deformation and are suitable as structural members for load-bearing walls.

[0050] A portion of a steel plate 40, which is similarly U-shaped when viewed from the front and has a larger vertical width than the insertion grooves 35, 36, is inserted into the insertion grooves 35, 36, and 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 wood panel 30.

[0051] A plurality of pin holes 37 are opened in the wide surface 31 of the wooden panel 30 at positions corresponding to the insertion grooves 35, 36, and pin holes (not shown) are also opened in the part of the steel plate 40 inserted into the insertion grooves 35, 36 at positions corresponding to the pin holes 37. When a part of the steel plate 40 is inserted into the insertion grooves 35, 36, the corresponding pin holes 37 and the pin holes in the steel plate 40 are aligned to form communicating holes, and drift pins 50 (an example of a first fixing means) are inserted into each communicating hole, thereby joining the wide surfaces of both the wooden panel 30 and the steel plate 40.

[0052] In addition, steel flanges 45 are welded to the left and right end faces of the steel plate 40. When the steel plate 40 is inserted into the insertion grooves 35, 36 of the wooden panel material 30, the left and right flanges 45 abut against parts of the left and right side end faces 32 of the wooden panel material 30.

[0053] A plurality of bolt holes 38 are formed in the left and right side end faces 32 of the wood panel 30. A plurality of bolt holes 46 are also formed in the flange 45.

[0054] When the steel plate 40 is inserted into the insertion grooves 35, 36 of the wooden panel 30 and the left and right flanges 45 abut against portions of the left and right side end faces 32 of the wooden panel 30, the corresponding bolt holes 38, 46 are aligned to form a communicating hole, and a lag screw bolt 55 (an example of a second fixing means) is driven into the communicating hole, pressing the flange 45 against the head of the lag screw bolt 55, thereby firmly fixing the flange to the left and right side end faces 32 of the wooden panel 30.

[0055] When the steel plate 40 is fixed to the wooden surface material 30, the upper and lower parts of the steel plate 40 protrude upward and downward from the upper end surface 33 and lower end surface 34 of the wooden surface material 30, and a plurality of bolt holes 42 are opened in these protruding parts.

[0056] In this way, a portion of the steel plate 40 is inserted into the upper and lower insertion grooves 35, 36 of the wooden panel 30, the wide surfaces of both plates are fixed together with drift pins 50, and the left and right side end faces 32 of the wooden panel 30 and the flanges 45 provided on the left and right ends of the steel plate 40 are fixed with lag screw bolts 55, thereby forming a load-bearing wall 20 having the wooden panel 30 and the upper and lower steel plates 40.

[0057] As shown in Figure 5, notches 39 are provided at the corners of the wooden panel 30. As such, by providing notches 39 at the four corners of the wooden panel 30, the shape of the wooden panel 30 in front view is approximately rectangular (a rectangular shape with the corners missing). Parts of the flanges 45 at the left and right ends of the steel plate 40 protrude into the notches 39.

[0058] As shown in Figure 1, when the other part of the steel plate 40 extending upward and downward from the upper and lower ends of the wooden panel 30 is aligned with the first gusset plate 15 extending into the structural plane from the upper and lower steel beams 11 and 12, the corresponding bolt holes 42 and 17 on both sides form a communicating hole, and by inserting a high-strength bolt 60 into the communicating hole, the first gusset plate 15 and the other part of the steel plate 40 are friction-joined on one side.

[0059] Meanwhile, a pair of second gusset plates 16 welded to the left and right ends of the first gusset plate 15 also have a plurality of bolt holes 17, and when the second gusset plate 16 and the flange 45 are in contact with each other, the corresponding bolt holes 17, 46 are aligned to form communicating holes. With the second gusset plate 16 and the flange 45 sandwiched between a pair of backing plates 65, high-strength bolts 60 are inserted into the communicating holes, thereby forming a two-surface friction joint between the second gusset plate 16 and the flange 45.

[0060] Here, the second gusset plate 16 and the flange 45 may be joined by one-surface friction welding.

[0061] In the configuration in which the second gusset plates 16 and the flanges 45 are friction-joined on one surface, the flanges 45 at the left and right ends of the bearing wall 20 are aligned with the interiors of pairs of left and right second gusset plates 16 that protrude upward and downward from the steel beams 11, 12, and the corresponding second gusset plates 16 and flanges 45 are joined with high-strength bolts 60. In this case, it is preferable to process or manufacture both the left and right second gusset plates 16 so that the width between the left and right flanges 45 is smaller than the width between the left and right second gusset plates 16, so that the bearing wall 20 can be disposed between them without interference between the second gusset plates 16 and the flanges 45. However, in this case, a gap may occur between the corresponding second gusset plates 16 and flanges 45.

[0062] In this way, if a gap occurs between the flange 45 and the second gusset plate 16, a filler plate or the like can be inserted between the two to close the gap, and then the second gusset plate 16 and the flange 45 can be joined using high-strength bolts 60.

[0063] On the other hand, in the illustrated example, in a configuration in which the second gusset plate 16 and the flange 45 are two-sided friction-welded, even if a gap occurs between the flange 45 and the second gusset plate 16, a pair of splice plates 65 sandwiching the flange 45 and the second gusset plate 16 between them makes it possible to achieve a bolted joint while absorbing a gap of, for example, 1 mm to several mm. For this reason, in addition to increasing the joint strength, two-sided friction welding is preferable for joining the flange 45 and the second gusset plate 16 in terms of workability.

[0064] Furthermore, the notches 39 provided at the corners of the wooden panel 30 facilitate good joining between the second gusset plate 16 and the flange 45. If the corners of the wooden panel were left as they were, it would be difficult to join the second gusset plate 16 and the flange 45 with bolts.

[0065] As shown in FIG. 1, when a horizontal force H is applied during an earthquake and the bearing wall frame 70 is deformed to the left and right, a bending moment and a shear force are generated in the bearing wall frame 70.

[0066] In the shear wall structure 70, the corner areas of the shear wall 20 are bending bearing areas MA (or bending transmission areas), and the central areas above and below the shear wall 20 are shear force bearing areas SA (or shear force transmission areas).

[0067] In this way, based on the design concept of bearing bending moments at the corner areas of the bearing wall 20, a U-shaped steel plate 40, when viewed from the front, is inserted into the upper and lower end faces of the wooden panel 30, and the left and right side end faces 32 of the wooden panel 30 are covered with flanges 45 provided at the left and right ends of the steel plate 40, and are firmly fixed in place with lag screw bolts 55.

[0068] With this structure, even if a bending moment occurs in the corner area of ​​the bearing wall 20 during a major earthquake, 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 earthquake resistance performance of the bearing wall 20 is fully demonstrated.

[0069] Furthermore, by using steel plates 40 that are U-shaped when viewed from the front in the bearing wall 20, it is possible to reinforce the corner areas of the bearing wall 20 over a wide area while keeping the area of ​​the steel plates as small as possible compared to, for example, steel plates that are rectangular when viewed from the front, and therefore a highly rigid bearing wall 20 can be formed while keeping material costs down.

[0070] Furthermore, by inserting the steel plate 40 into the wooden panel 30, the entire steel plate 40 is prevented from being visible from both of the two wide surfaces 31 of the wooden panel 30, thereby forming a load-bearing wall 20 with excellent external design.

[0071] In the illustrated example, a portion of the steel plate 40 is inserted into the insertion grooves 35, 36 formed on the upper and lower end faces of the wooden panel 30, but it may also be configured, for example, such that a portion of the steel plate is sandwiched above and below the two wooden panel members (not shown). The illustrated shear wall 20 has a portion of the steel plate 40 inserted into the insertion grooves 35, 36 formed within the thickness of one wooden panel 30, which has the advantage of allowing a hybrid structure of the wooden panel 30 and the steel plate 40 to be formed without increasing the thickness of the shear wall 20. On the other hand, a configuration in which a portion of the steel plate is sandwiched between two wooden panel members has the advantage of further increasing the overall rigidity of the shear wall, although the thickness of the shear wall increases.

[0072] Next, another example of a bearing wall according to an embodiment will be described with reference to Fig. 7. Here, Fig. 7 is a front view and a side view of the other example of a bearing wall according to an embodiment.

[0073] The bearing wall 20A shown in Figure 7 has divided steel plates 40A that are L-shaped when viewed from the front inserted into the upper and lower insertion grooves 35, 36 of the wooden panel 30, forming a steel plate that is U-shaped when viewed from the front as a whole.

[0074] In this way, in a bearing wall 20A having two divided steel plates 40A, the divided steel plates 40A are easier to handle and install than steel plates 40 of twice the size, making the bearing wall 20A even easier to work.

[0075] 8(a) and (b) show an example of a pre-yielding means provided on a steel beam of a steel frame structure.

[0076] The example shown in Figure 8(a) is an enlarged view of the pre-yielding means shown in Figure 1, and is a plurality of (three in the illustrated example) cross-sectional defect holes 18 provided in the web 11a of the steel beam 11.

[0077] 8(b) shows an example of a cross-section loss notch 19 provided in the upper flange 11b and the lower flange 11c of the steel beam 11. This cross-section loss notch 19 is also called a dog bone.

[0078] Regardless of which prior yielding method is applied to the steel beams 11, 12, by causing the steel beams 11, 12 to yield prior to the shear wall 20, a highly tough shear wall structure 70 can be formed.

[0079] It should be noted that the present invention is not limited to the configurations shown here, and other embodiments may be possible in which other components are combined with the configurations described in the above embodiments. In this regard, the present invention can be modified within the scope of the present invention, and can be appropriately determined depending on the application form. [Explanation of symbols]

[0080] 10: Steel frame 11: Steel beam 11a:Web 11b: Upper flange 11c: Lower flange 11d: Reinforcement rib 12: Steel beam (foundation) 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: (Cross-section defect notch) Dogbone 20,20A: Load-bearing wall 30:Wood surface material 31: Wide surface 32: Side end surface 33: Upper end surface 34: Bottom end surface 35,36: Interpolation groove 37: Pinhole 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: Splice 70: Load-bearing wall frame H: Horizontal force MA: bending load area SA: Shear load area

Claims

1. A steel frame structure formed by a pair of steel columns and a pair of steel beams, comprising a load-bearing wall attached to the pair of steel beams, A wooden surface material that is rectangular or approximately rectangular when viewed from the front, Steel plates are inserted above and below the wooden surface material from the left and right ends to the inside of the wooden surface material, The wide surfaces of the wood surface material and the steel plate are fixed to each other by a first fixing means, A shear 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 wooden panel are fixed by second fixing means.

2. 2. The bearing wall according to claim 1, wherein the steel plates are U-shaped when viewed from the front and extend downward or upward from the left and right corners of the wooden panel.

3. 3. The bearing wall according to claim 1, wherein the steel plate is formed of two divided steel plates that are L-shaped when viewed from the front.

4. the first fixing means is a drift pin, 4. A bearing wall according to claim 1, wherein the second fixing means is a lag screw bolt.

5. The bearing wall according to any one of claims 1 to 4, wherein the wooden surface material is a CLT panel or an LVL panel.

6. A shear wall according to any one of claims 1 to 5, characterized in that an insertion groove is provided at each of the upper and lower ends of the wooden panel, and a part of the steel plate is inserted into the insertion groove.

7. 6. A bearing wall according to claim 1, wherein a part of the steel plate is sandwiched above and below each of the two wooden panelings.

8. A notch is provided at the corner of the wood surface material, The bearing wall according to any one of claims 1 to 7, wherein a part of the flange projects into the notch.

9. The other portions of the steel plates constituting the bearing wall according to any one of claims 1 to 8 extend from the upper and lower ends of the wood panel, A shear wall structure characterized in that the other part of the steel plate and the steel beam are connected by bolts.

10. 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, the first gusset plate and another portion of the steel plate are bolted together; 10. The shear wall frame according to claim 9, wherein the second gusset plate and the flange are connected by bolts.

11. the first gusset plate and the other portion of the steel plate are joined by one-face friction joining using a high-strength bolt, 11. The shear wall frame according to claim 10, wherein the second gusset plate and the flange are joined by a one-side friction joint or a two-side friction joint using high-strength bolts.

12. A shear wall structure as described in any one of claims 9 to 11, characterized in that at least one of the pair of steel beams is provided with a pre-yielding means for causing the steel beam to yield before the shear wall.

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