Vibration-damping walls and vibration-damping wall frames

Abstract

To provide a damping wall, which ensures integrity between a wooden surface member and a steel plate when being deformed during earthquake, suppresses buckling of the steel plate, and has excellent deformability, and a damping wall frame having high damping performance.SOLUTION: On a steel frame 10 formed of a pair of steel columns 13 and a pair of steel beams 11, 12, a damping wall 20 is fitted to the pair of steel beams 11, 12. The damping wall has a pair of wooden surface members 30 having a plurality of first holes 35 on a wide width surface 31, and a steel plate 40 that is disposed between the pair of wooden surface members 30 and has a plurality of second holes 45 corresponding to the plurality of first holes 35 on a wide width surface 41. The wide width surfaces of the pair of wooden surface members 30 and the steel plate 40 are abutted to each other and connected with bolts by inserting a bolt 50 into the first hole 35 and the second hole 45 corresponding to each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vibration control wall and a vibration control wall structure.

Background Art

[0002] In some cases, a shear wall (shear panel) formed of a wooden facing material is arranged inside a structure (steel frame structure) 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. A shear wall structure is applied to a steel building. Since the wooden facing material has high shear rigidity and excellent appearance design properties, it is suitable for application to shear walls.

[0003] Instead of such a shear wall, there is also a vibration control wall that combines a wooden facing material and a steel plate and plasticizes the steel plate during an earthquake to absorb earthquake energy. A vibration control wall structure is formed by attaching a vibration control wall to a pair of steel beams of a steel frame structure.

[0004] Here, Patent Document 1 proposes a shear wall formed of a wooden facing material and a steel plate. This shear wall has a frame member having a pair of vertical members arranged at intervals in the horizontal direction of the building and extending in the vertical direction of the building, and a pair of horizontal members arranged at intervals in the vertical direction of the building and connecting the pair of vertical members in the horizontal direction of the building, a wooden facing material formed in a plate shape using a wooden material, and a metal facing material formed in a plate shape using a metal material, having a plurality of openings arranged at intervals in the vertical direction of the building, and being fixed to the frame member together with the wooden facing material in a state of being joined to the wooden facing material. Here, the metal facing material (steel plate) and the wooden facing material are joined by an adhesive between their wide surfaces, and the metal facing material and the frame member are joined by nails between their wide surfaces.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

[0006] In the load-bearing wall described in Patent Document 1, the integrity of the load-bearing wall is ensured by joining the wide surfaces of the wooden panel and the steel plate, and the wide surfaces of the steel plate and the frame material (wooden frame material) with adhesive or nails. However, in a structure where the wide surfaces of laminated members are simply joined with adhesive or nails, for example, when a horizontal force acts on the frame during an earthquake and the frame and the load-bearing wall deform significantly, the joints of each component may come loose and the members may fall apart, potentially preventing the structure from exhibiting sufficient seismic resistance against repeated horizontal forces.

[0007] Furthermore, because the connections between the individual components are released in this way, it becomes difficult to restrain the buckling of the steel plate on the inside.

[0008] This invention has been made in view of the above problems, and aims to provide a vibration-damping wall with excellent deformation performance, in which the integrity of the wooden panel and steel plate is ensured during deformation during an earthquake, and buckling of the steel plate is suppressed, as well as a vibration-damping wall frame having high vibration damping performance. [Means for solving the problem]

[0009] To achieve the above objective, one embodiment of the vibration-damping wall according to the present invention is: In a steel frame structure formed by a pair of steel columns and a pair of steel beams, a vibration-damping wall is attached to the pair of steel beams, A pair of wood-based panel materials, each having multiple first holes on its wide surface, It comprises a steel plate disposed between the pair of wood-based surface materials, and having a plurality of second holes on its wide surface corresponding to the plurality of first holes, The pair of wood-based surface materials and the wide surfaces of the steel plate are in contact with each other, and bolts are inserted through the corresponding first and second holes, thereby forming a bolted joint.

[0010] In this embodiment, a steel plate is placed between a pair of wooden panels, and bolts are inserted through a plurality of corresponding first and second holes on the wide surfaces of the wooden panels and the steel plate to bolt them together. This connects the wooden panels and the steel plate to each other over, for example, the entire wide surface of both, ensuring the integrity of the wooden panels and the steel plate during deformation during an earthquake. Furthermore, the steel plate functions as a member that plasticizes when the damping wall is subjected to horizontal forces during an earthquake, absorbing seismic energy. The pair of wooden panels with the steel plate placed between them functions as a buckling restraint member that restrains the buckling (e.g., shear buckling) of the steel plate. As a result, buckling of the steel plate is suppressed, and a damping wall with excellent deformation performance and toughness can be formed. In addition, since the pair of wooden panels are bolted together by a plurality of bolts, the separation of the pair of wooden panels that function as a buckling restraint member is effectively suppressed.

[0011] The wood-based panel material is formed from, for example, structural plywood. The vibration-damping wall may also be referred to as a vibration-damping panel or vibration-damping wall panel.

[0012] Furthermore, in another embodiment of the vibration-damping wall according to the present invention, The second hole is characterized by being a circular hole with a larger diameter than the bolt.

[0013] According to this embodiment, the multiple second holes provided on the wide surface of the steel plate are circular holes with a larger diameter (larger planar dimensions) than the bolts through which they are inserted, thereby limiting the plastic deformation region to the area around the circular holes. Furthermore, by providing multiple second holes distributed across the entire wide surface, the entire area of ​​the steel plate (the area where the second holes are located) can be made into a plastic deformation region, thereby increasing the energy absorption capacity of the steel plate during earthquakes.

[0014] Furthermore, because multiple second holes exist throughout the steel plate, when the damping wall is displaced from side to side, the circular second holes have no directional tendency to deform (they deform easily in any direction of 360 degrees). Therefore, when the damping wall deforms in the lateral direction due to the horizontal forces acting repeatedly on the damping wall from side to side, the area around each second hole deforms effectively, causing the steel plate to plastically deform and quickly absorb seismic energy.

[0015] Here, the second hole in the steel plate is a circular hole with a larger diameter than the bolt through which it is inserted, while the first hole in the wood panel can be a circular hole with a diameter similar to that of the bolt. With this configuration, the second hole in the steel plate can be freely deformed without interfering with the bolt, and the first hole in the wood panel is fastened by the bolt, suppressing the separation of the pair of wood panels and effectively functioning as a buckling restraint.

[0016] Furthermore, in another embodiment of the vibration-damping wall according to the present invention, The central region of the steel plate is characterized by being narrower than the upper and lower regions.

[0017] According to this embodiment, by making the central region of the steel plate narrower than the upper and lower regions, the plastic deformation region of the steel plate is limited to the central region, making it easier to plasticize the central region and quickly absorb earthquake energy. More specifically, it is preferable that the central region is relatively narrow, and that multiple second holes, which are larger in diameter than the bolts through which they are inserted, are distributed within this central region.

[0018] Furthermore, in another embodiment of the vibration-damping wall according to the present invention, The steel plate is provided with at least two anti-slip engaging portions, The pair of wood-based surface materials are provided with anti-slip engaged portions at positions corresponding to the anti-slip engaging portions, The corresponding anti-slip engaging portion and the anti-slip engaged portion are engaged with each other.

[0019] According to this aspect, the steel plate has at least two anti-slip engaging portions, and a pair of wooden facing materials have anti-slip engaged portions at positions corresponding to the anti-slip engaging portions. By the corresponding anti-slip engaging portions and anti-slip engaged portions being engaged with each other, even if the second hole has a larger diameter than the bolt, the steel plate is suppressed from shifting vertically and horizontally. Here, as an example of the anti-slip engaging portion and the anti-slip engaged portion, for example, one is a protrusion and the other is a groove into which the protrusion fits. By having at least two combinations of mutually corresponding anti-slip engaging portions and anti-slip engaged portions, the displacement of the steel plate can be suppressed, but "at least two" includes combinations of three or more.

[0020] Further, in another aspect of the vibration damping wall according to the present invention, The wooden facing material is characterized by being a CLT panel or an LVL panel.

[0021] According to this aspect, by applying a CLT (Cross Laminated Timber) panel or an LVL (Laminated Veneer Lumber) panel as the wooden facing material, the shear strength is high and a wooden facing material with as wide a width as possible can be formed.

[0022] Further, in one aspect of the vibration damping wall structure according to the present invention, Gusset plates extending parallel to the cross-section of the steel frame structure are attached to the pair of steel beams, In the vibration damping wall, the upper and lower sides of the steel plate protrude vertically from the upper and lower ends of the pair of wooden facing materials, and are joined to the upper and lower gusset plates by single-sided friction joining or double-sided friction joining with high-strength bolts.

[0023] According to this aspect, by incorporating the vibration damping wall of the present invention inside the steel frame structure, a vibration damping wall structure having high vibration damping performance can be formed.

Effect of the Invention

[0024] As can be understood from the above explanation, the vibration-damping wall and vibration-damping wall frame of the present invention ensure the integrity of the wooden panel material and steel plate during deformation during an earthquake, suppressing buckling of the steel plate and providing a vibration-damping wall with excellent deformation performance and a vibration-damping wall frame with high vibration damping performance. [Brief explanation of the drawing]

[0025] [Figure 1] This is a front view of an example of a vibration-damping wall frame according to an embodiment. [Figure 2] This is a view taken in the direction of arrow II in Figure 1, and is a side view of an example of a load-bearing wall frame according to the embodiment. [Figure 3] This is a front view of an example of a steel frame structure that forms a vibration-damping wall frame according to the embodiment. [Figure 4] This is a front view of an example of a vibration-damping wall according to the embodiment. [Figure 5] This is a front view of an example of a steel plate that makes up a vibration-damping wall. [Figure 6] This figure shows an example of the deformation of a vibration-damping wall frame and vibration-damping wall when horizontal forces are applied during an earthquake. [Modes for carrying out the invention]

[0026] Hereinafter, an example of a vibration-damping wall frame and vibration-damping wall according to the embodiment will be described with reference to the attached drawings. In this specification and drawings, substantially identical components may be denoted by the same reference numerals to avoid redundant explanations.

[0027] [Vibration-damping wall frame and vibration-damping wall according to the embodiment] An example of a vibration-damping wall frame and vibration-damping wall according to the embodiment will be described with reference to Figures 1 to 6. Here, Figure 1 is a front view of an example of a vibration-damping wall frame according to the embodiment, and Figure 2 is a side view of an example of a load-bearing wall frame according to the embodiment, viewed from the direction arrow II in Figure 1. Furthermore, Figure 3 is a front view of an example of a steel frame forming the vibration-damping wall frame according to the embodiment, Figure 4 is a front view of an example of a vibration-damping wall according to the embodiment, and Figure 5 is a front view of an example of a steel plate constituting the vibration-damping wall.

[0028] The vibration-damping wall frame 60 is formed in a steel frame 10 which is made up of a pair of steel columns 13 and a pair of steel beams 11 and 12, by attaching vibration-damping walls 20 to the pair of steel beams 11 and 12. Here, in the illustrated example, steel beam 11 is a beam between the first and second floors, and steel beam 12 is a beam that forms the foundation, but the pair of steel beams may be beams on higher floors (for example, beams on the third and second floors), etc.

[0029] In the illustrated example, the steel column 13 and steel beams 11 and 12 are all formed from H-shaped steel. However, the steel column may be formed from, for example, a square steel pipe.

[0030] As shown in Figure 3, gusset plates 15 extending parallel to the structural plane of the steel frame 10 are welded to the lower surface of the lower flange 11c of the upper steel beam 11 and to the upper surface of the upper flange 12b of the lower steel beam 12. Multiple bolt holes 17 are provided in the gusset plates 15.

[0031] As shown in Figure 2, reinforcing ribs 11d and 12d are provided on both sides of the webs 11a and 12a of the steel beams 11 and 12, at positions corresponding to both ends of the gusset plate 15.

[0032] As shown in Figure 1, a steel plate 40 constituting a rectangular (in front view) vibration damping wall 20 (vibration damping wall panel) is frictionally joined to the upper and lower gusset plates 15 via high-strength bolts 55, thereby forming a vibration damping wall frame 60 having a steel frame 10 and vibration damping walls 20.

[0033] As shown in Figures 2 and 4, the vibration-damping wall 20 has a pair of rectangular wooden panels 30 in front view (shape of the wide surface 31) and a steel plate 40 disposed between the pair of wooden panels 30. The upper and lower parts of the steel plate 40 protrude vertically from the upper end surface 32 and lower end surface 33 of the wooden panels 30, and a number of bolt holes 47 are provided in these protruding areas.

[0034] As shown in Figures 1 and 2, when the steel plates 40 extending upward and downward from the upper and lower ends of the vibration-damping wall 20 and the gusset plates 15 extending into the structural plane from the upper and lower steel beams 11 and 12 are aligned, the corresponding bolt holes 47 and 17 of both form connecting holes. By inserting high-strength bolts 55 through these connecting holes, the gusset plates 15 and the steel plates 40 are joined to each other by one-sided friction joint, thereby forming the vibration-damping wall frame 60. Here, the gusset plates 15 and the steel plates 40 may also be joined by two-sided friction joint.

[0035] The wood panel 30 can be made of CLT panels or LVL panels. By using these panels, it is possible to form wood panels with high shear strength and as wide as possible.

[0036] For example, CLT panels can be used in a wide range of sizes, up to 12m x 2.6m in length and width. Furthermore, because CLT panels are constructed by laminating multiple boards with their fiber directions intersecting (orthogonal), they are particularly resistant to deformation and are suitable as structural members for load-bearing walls.

[0037] As shown in Figures 4 and 5, the front view shape of the wide surface 41 of the steel plate 40 has a shape in which the central region 44 is relatively narrower than the upper region 42 and the lower region 43. Multiple circular holes, or second holes 45, are provided in the relatively narrow central region 44. In the illustrated example, a total of 20 second holes 45 are arranged in 4 rows and 5 columns, and are spaced equally apart from each other. However, the multiple second holes may be arranged equally apart in a configuration other than 4 rows and 5 columns, or they may be irregularly distributed within the central region 44.

[0038] As shown in Figure 2, a first hole 35 is provided in each of the two wood-based surface materials 30 at a position corresponding to the second hole 45 of the steel plate 40 placed between them.

[0039] The first hole 35 in the wood panel 30 has a diameter similar to that of the bolt 50 through which it is inserted, while the second hole 45 in the steel plate 40 is a circular hole with a larger diameter than the bolt 50.

[0040] Counterbore grooves 36 are provided on the outer wide surface 31 of the wood panel 30 at positions corresponding to the first holes 35. When the steel plate 40 is placed between the pair of wood panels 30, the two corresponding first holes 35 and second holes 45 connect to form a connecting hole, and bolts 50 are inserted through the connecting hole and tightened, thereby integrating the pair of wood panels 30 and the steel plate 40 over a wide area of ​​both wide surfaces 31 and 41, and forming a vibration-damping wall 20. At this time, the heads and nuts of the bolts 50 are housed in the counterbore grooves 36.

[0041] Two anti-slip engagement portions 38 are provided on the inner surface (the surface that abuts the steel plate 40) of the wood-based panel 30. These anti-slip engagement portions 38 are, for example, grooves. On the other hand, on both wide surfaces 41 of the steel plate 40, two anti-slip engagement portions 48 are provided at positions corresponding to the two anti-slip engagement portions 38 when the steel plate 40 is positioned between the pair of wood-based panel 30. These anti-slip engagement portions 48 are, for example, projections that fit into grooves.

[0042] When a steel plate 40 is placed between a pair of wooden panel materials 30, the two anti-slip engaging portions 48 on both wide surfaces 41 of the steel plate 40 engage with the two anti-slip engaged portions 38 of the corresponding wooden panel materials 30. This prevents the steel plate 40 from shifting up, down, left, or right, even if the multiple second holes 45 in the steel plate 40 are larger in diameter than the bolts 50, thereby forming a vibration-damping wall 20.

[0043] In the vibration-damping wall 20, the steel plate 40 functions as a member that plasticizes when the vibration-damping wall 20 is subjected to horizontal forces during an earthquake, thereby absorbing seismic energy. On the other hand, the pair of wooden panel members 30, which are placed between the steel plate 40, function as buckling restraint members that restrain the buckling of the steel plate 40. In the vibration-damping wall 20, the pair of wooden panel members 30 are bolted together by multiple bolts 50, so that the separation of the pair of wooden panel members 30, which function as buckling restraint members, is effectively suppressed.

[0044] Of the steel plate 40, the relatively narrow central region 44 becomes the plastic deformation region when the damping wall 20 deforms during an earthquake. In other words, by limiting the plastic deformation region to the central region 44 of the steel plate 40 and making the central region 44 easier to plasticize, it becomes possible to quickly absorb earthquake energy.

[0045] Furthermore, multiple second holes 45, which are larger in diameter than the bolts 50 through which the bolts are inserted, are provided in this central region 44 in a regularly distributed manner. Since the second holes 45 are circular holes with a larger diameter than the bolts 50 through which the bolts are inserted, the plastic deformation region can be limited to the area around the second holes 45 within the central region 44. In the illustrated example, since multiple second holes 45 are evenly distributed within the central region 44, the entire central region 44 becomes the plastic deformation region. In other words, since the plastic deformation region can be limited to a predetermined range as broad as possible, a wide area of ​​the steel plate 40 can be effectively utilized as an energy absorption region during earthquakes.

[0046] Furthermore, when the damping wall 20 is displaced from side to side, the circular holes of the second holes 45 have no directional tendency to deform (they deform easily in any direction). Therefore, when the damping wall 20 deforms in the left-right direction due to the horizontal forces acting repeatedly on it, the area around each second hole 45 deforms effectively, causing the steel plate 40 to plastically deform and quickly absorb seismic energy.

[0047] Furthermore, because the second hole 45 is larger in diameter than the bolt 50, interference between the deformed second hole 45 and the bolt 50 inserted through it during an earthquake is suppressed, thus ensuring the free deformation of the second hole 45.

[0048] In addition to its excellent seismic energy absorption capabilities, the vibration-damping wall 20 also boasts superior aesthetic appeal due to the presence of wood-based paneling 30 on both of its wide surfaces.

[0049] Figure 6 shows an example of the deformation of the vibration control wall frame 60 and vibration control wall 20 when horizontal forces are applied during an earthquake.

[0050] When a horizontal force H acts on the damping wall frame 60 during an earthquake, and the damping wall frame 60 deforms in the direction of the horizontal force H, the damping wall 20 also deforms in sync with the deformation of the steel frame 10. At this time, multiple second holes 45 in the central region 44 of the steel plate 40 constituting the damping wall 20 deform in the diagonal X direction, and the central region 44 plastically deforms, thereby absorbing earthquake energy. At this time, the steel plate 40 is protected from shear buckling by a pair of wooden panel materials 30, thus maintaining the earthquake energy absorption capacity of the damping wall 20 and forming a damping wall frame 60 with excellent damping performance.

[0051] Furthermore, other embodiments may be used in which other components are combined with the configurations listed in the above embodiments, and the present invention is not limited in any way to the configurations shown herein. In this regard, modifications can be made without departing from the spirit of the present invention, and can be appropriately determined according to the application form. [Explanation of symbols]

[0052] 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: Gusset Plate 17: Bolt holes 20: Vibration damping wall 30: Wood-based paneling 31: Wide surface 32: Upper end surface 33: Bottom end surface 35: 1st hole 36: Counterbore groove 38: Anti-slip engaging part (engaging groove) 40: Steel plate 41: Wide surface 42: Upper area 43: Lower area 44: Central area 45: Second hole (circular hole) 47: Bolt holes 48: Anti-slip engagement part (projection) 50: Bolt 55: High-strength bolts 60: Damping wall frame H: Horizontal force

Claims

1. A steel frame structure formed by a pair of steel columns and a pair of steel beams, wherein a vibration-damping wall is attached to the pair of steel beams, A pair of wood-based panel materials, each having multiple first holes on its wide surface, It comprises a single steel plate disposed between the pair of wood-based surface materials, and having a plurality of second holes on its wide surface corresponding to the plurality of first holes, The upper and lower parts of the aforementioned steel plate protrude vertically from the upper and lower ends of the pair of wooden panel materials, and the protruding areas are attached to the pair of steel beams. The pair of wood-based panels and the wide surfaces of the steel plate are in contact with each other, and bolts are inserted through the corresponding first and second holes, thereby forming a bolted joint. A vibration-damping wall characterized in that the central region of the steel plate is located in the central region of the wood-based surface material, and the central region of the steel plate is narrower than the upper and lower regions of the steel plate and becomes a plastic deformation region.

2. The vibration-damping wall according to claim 1, characterized in that the second hole is a circular hole with a diameter larger than the outer diameter of the bolt.

3. The steel plate is provided with at least two projections that serve as anti-slip engaging portions, The pair of wood panels are provided with grooves that are slip-preventing engagement portions at positions corresponding to the slip-preventing engagement portions, A vibration-damping wall according to claim 1 or 2, characterized in that the corresponding anti-slip engaging portion and the anti-slip engaged portion are engaged with each other.

4. The vibration-damping wall according to any one of claims 1 to 3, characterized in that the wood surface material is a CLT panel or an LVL panel.

5. A vibration damping wall frame comprising a steel frame formed by a pair of steel columns and a pair of steel beams, and a vibration damping wall according to any one of claims 1 to 4 attached to the pair of steel beams, The pair of steel beams are fitted with gusset plates that extend parallel to the structural plane of the steel frame. A vibration-damping wall frame characterized in that the upper and lower parts of the steel plates, which protrude vertically from the upper and lower ends of the pair of wooden panel materials, are joined to the upper and lower gusset plates by single-sided friction joints or double-sided friction joints using high-strength bolts.

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