Damper

Abstract

To attain stable attenuation force while restraining enlargement of a damper.SOLUTION: A damper 100 includes two support members 110 having end surfaces 112 arranged in parallel at an interval on the same plane, and a deformed portion 118 in which top portions 122 of arch-shaped portions 120 extending in an arch shape on the same plane from the end surfaces 112 of the support members 110 are connected with each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a damper. [Background technology]

[0002] Patent Document 1 discloses a technology related to a seismic damper that is attached to a structure to absorb vibration energy. In this prior art, a column is formed on the plate-shaped main body of the seismic damper. The dangerous cross-sectional position of the column in the in-plane direction of the main body is different from the dangerous cross-sectional position of the column in the out-of-plane direction, which is a direction perpendicular to the in-plane direction. The dangerous cross-sectional position in the out-of-plane direction is at the base of the column, and the dangerous cross-sectional position in the in-plane direction is shifted from the base of the column toward the center of the column.

[0003] Patent Document 2 discloses technology related to a hysteresis damper that absorbs earthquake energy by utilizing the hysteresis that accompanies the deformation of elastoplastic materials such as steel. In this prior art, a flat hysteresis damper has multiple L-shaped energy absorbers arranged in parallel with slits between them, with both ends of each energy absorber attached to opposing support plates. The energy absorbers are characterized by their plate width gradually narrowing toward the top of the L-shape, with constrictions on both sides of the top.

[0004] Patent Document 3 discloses a technology relating to an improvement of a vibration energy absorption damper made of a low-yield-stress metal such as ultra-soft steel or lead. In this prior art, the vibration energy absorption damper is made of a low-yield-stress metal with a lower yield stress than structural steel. It has two retaining parts arranged in two rows and a bent, plate-shaped connecting part whose both ends are connected to the two retaining parts. The damper is characterized in that the innermost position of the concave-side edge of the connecting part is located on the convex side of the connection point with the retaining part on the convex-side edge.

[0005] Patent Document 4 discloses a technique relating to a vibration-damping structure formed from studs installed in a building and vibration-damping devices installed in the studs. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-25674 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-116973 [Patent Document 3] Japanese Patent Application Publication No. 10-121772 [Patent Document 4] Japanese Patent Application Publication No. 2019-27195 Summary of the Invention [Problem to be solved by the invention]

[0007] For example, high-rise buildings often use dampers to attenuate horizontal forces during earthquakes. However, these dampers tend to be large in size in order to ensure that they can stably bear the damping force. However, when dampers are large, problems can arise, such as limitations on their placement due to factors such as span divisions, interference with other architectural elements such as doors and equipment piping.

[0008] In view of the above, an object of the present invention is to obtain a stable damping force while suppressing an increase in the size of the damper. [Means for solving the problem]

[0009] The first aspect is a damper comprising two support members whose end faces are arranged parallel to one another and spaced apart on the same plane, and a deformation section in which the tops of arch-shaped sections extending in an arch shape from the end faces of the support members onto the same plane are connected.

[0010] In the damper of the first aspect, energy is absorbed by bending deformation caused by the stretching of the deforming section. At this time, one side of the strut becomes a tensile field, suppressing lateral buckling on the compression side, and a stable damping force is obtained. Therefore, a stable damping force is obtained while suppressing an increase in the size of the damper.

[0011] A second aspect is the damper according to the first aspect, wherein the arched portion is semicircular.

[0012] In the damper of the second embodiment, the arch-shaped portion has a semicircular shape, which is smoother than, for example, a polygonal shape, and results in smoother hysteresis characteristics.

[0013] A third aspect is the damper according to the first or second aspect, wherein a base portion of the arch-shaped portion is wider than other portions.

[0014] In the damper of the third aspect, the base portion of the deformed portion is wider than the other portions, so that plastic strain in the base portion is suppressed. [Effects of the Invention]

[0015] According to the present invention, a stable damping force can be obtained while suppressing an increase in the size of the damper. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 2 is a front view of the damper according to the embodiment. [Figure 2] FIG. 1 is an elevation view of the damper installed on the stud. [Figure 3] 10 is a graph showing the results of a numerical analysis of the hysteresis characteristic of a damper. [Figure 4] FIG. 1 is an elevation view of a first example of use. [Figure 5] FIG. 10 is a cross-sectional view of a second example of use. [Figure 6] FIG. 10 is a cross-sectional view of a third example of use. [Figure 7] In the fourth usage example, (A) is a cross-sectional view of line 7A-7A in (B), (B) is a cross-sectional view of line 7B-7B in (A), and (C) is an enlarged plan view of the damper mounting portion. [Figure 8] FIG. 10 is a front view of the damper in a deformed state. DETAILED DESCRIPTION OF THE INVENTION

[0017] <Embodiment> A damper according to one embodiment of the present invention will be described. Two directions perpendicular to the horizontal direction are designated as the X direction and the Y direction, and are indicated by the arrows X and Y, respectively. The vertical direction perpendicular to the X direction and the Y direction is designated as the Z direction, and is indicated by the arrow Z.

[0018] [structure] First, the structure of the damper of this embodiment and a stud using this damper will be described.

[0019] As shown in Fig. 1, the damper 100 is configured to have two support members 110 and a deformation portion 118 provided between the two support members 110. In this embodiment, the two support members 110 are rectangular plate-shaped, and end faces 112 are arranged parallel to each other with a gap between them on the same plane. The direction along the end faces 112 of the support members 110 is the X direction. The support member 110 is also formed with a plurality of through holes 114 that penetrate in the out-of-plane direction (Y direction).

[0020] The deformation portion 118 is provided with arch-shaped portions 120 that extend arch-like from the end faces 112 of the two support members 110 on the same plane so as to convex in opposite directions in the up-down direction. The two arch-shaped portions 120 are connected at their apexes 122. In this embodiment, the two arch-shaped portions 120 are semicircular with the same radius and are symmetrical in the up-down direction, but the present invention is not limited to this.

[0021] The base 124 of the arch-shaped portion 120 of the deformation portion 118 is wider in the X direction than other portions. In this embodiment, the plate thickness (thickness in the Y direction) of the arch-shaped portion 120 of the deformation portion 118 is smaller than the width (radial width of the semicircle). In addition, the damper 100 of this embodiment is made by cutting out a steel plate with a laser, but the present invention is not limited to this.

[0022] As shown in FIG. 2, damper 100 (see also FIG. 1) is installed in building 10, which is a vibration-controlled building. Damper 100 is installed in stud 20 installed between upper beam 12 and lower beam 14, which are an example of a structural body, and functions as a vibration-controlling damper. Specifically, damper 100 is installed between upper stud 22 and lower stud 24 that make up stud 20. Furthermore, dampers 100 are installed side by side in the horizontal direction (X direction).

[0023] In this embodiment, the support members 110 of the damper 100 are inserted into slits formed in the lower ends of the upper studs 22 and the upper ends of the lower studs 24, and bolts 30 are inserted into the through holes 114 (see FIG. 1 ) and fastened together, thereby joining the damper 100 to the upper studs 22 and the lower studs 24. Note that the joining structure between the lower ends of the upper studs 22 and the lower studs 24 and the damper 100 is one example and is not limited to this. In this embodiment, the beam direction of the upper beams 12 and the lower beams 14 is the X direction. The out-of-plane direction of the upper studs 22 and the lower studs 24 is the Y direction.

[0024] In this embodiment, the upper beams 12 and the lower beams 14 are made of steel, and the upper studs 22 and the lower studs 24 are made of wood, specifically, CLT (Cross Laminated Timber), but this is not limited to this. Also, in this embodiment, the steel-framed upper beams 12 and lower beams 14 and the wooden upper studs 22 and lower studs 24 are joined by bolts 72 and tension bolts 70, but this is not limited to this.

[0025] (action) Next, the operation of this embodiment will be described.

[0026] During an earthquake, the deformation portion 18 of the damper 100 deforms in response to relative movement in the horizontal direction (the horizontal direction (X direction) in the plane of the stud 20) between the upper beam 12 and the lower beam 14 shown in FIG. 2. In FIG. 8, the shape of the deformation portion 118 of the damper 100 before deformation is shown by a two-dot chain line, and the shape in the deformed state is shown by a solid line. Note that FIG. 8 illustrates a state in which the upper beam 12 (upper stud 22) has moved horizontally to the right of the figure relative to the lower beam 14 (lower stud 24).

[0027] 8, the arch-shaped portion 120 of the deformation portion 118 of the damper 100 is stretched to absorb energy through bending deformation. At this time, the deformation portion 118 is formed with a strut S1 and a strut S2 in the diagonal direction.

[0028] Even when the amount of horizontal relative movement between the upper support member 110 (upper beam 12 and upper stud 22 in Figure 2) and the lower support member 110 (lower beam 14 and lower stud 24 in Figure 2) is large and the amount of deformation of the deformation portion 118 is large, one strut S1 acts as a tension field and the other strut S2 acts as a compression field, thereby suppressing out-of-plane lateral buckling of the compression-side deformation portion 118. Therefore, a stable damping force is generated in the damper 100, which attenuates the relative movement between the upper beam 12 and lower beam 14 shown in Figure 2 and damps the swaying of the building 10.

[0029] Furthermore, as shown in FIG. 1, in the damper 100 of this embodiment, the arch-shaped portion 120 of the deformation portion 118 is semicircular, and therefore has a smoother shape and a smoother hysteresis characteristic (see FIG. 3 described later) compared to, for example, when the arch-shaped portion 120 is polygonal.

[0030] Furthermore, in the damper 100 of this embodiment, the base portion 124 of the arch-shaped portion 120 of the deformation portion 118 is wider than other portions, so that plastic strain in the base portion 124 during large deformation is suppressed.

[0031] Here, the hysteresis characteristic of the damper 100 of this embodiment will be described.

[0032] The graph in Fig. 3 shows the results of a numerical analysis of the hysteresis loop characteristics of the damper 100 of this embodiment. As mentioned above, one strut S1 shown in Fig. 8 acts as a tension field, and the other strut S2 acts as a compression field, which suppresses out-of-plane lateral buckling of the deformed portion 118 on the compression side, thereby obtaining a stable damping force.

[0033] Specifically, the solid line R1 of the hysteresis curve in Figure 3 represents the characteristic of the damper 100 of this embodiment, and the dashed line R2 represents the characteristic when buckling occurs. R2 of the comparative example has an unstable hysteresis curve in which the yield strength decreases as deformation progresses. Therefore, as can be seen by comparing R1 and R2, during large deformation, R1 has a larger damping force at 30 mm-40 mm in the graph of Figure 3. In other words, it can be seen that the damper 100 can obtain a stable damping force without increasing its size.

[0034] [Other use cases] Next, another example of use of the damper 100 of this embodiment will be described.

[0035] (First usage example) In the first use example shown in Figure 4, the damper 100 is installed between a stud 21, which is installed between an upper beam 13 as an example of a structural body and a floor slab 15, and the upper beam 13, and functions as a vibration damper.

[0036] In this embodiment, the upper beams 13 and floor slab 15 are made of reinforced concrete, and the partition 21 is made of wood, specifically, CLT (Cross Laminated Timber), but this is not limiting. The dampers 100 are installed side by side in the horizontal direction (X direction). Furthermore, in this example, piping 50 is provided between the dampers 100.

[0037] In this example of use, the upper support member 110 of the damper 100 is bolted to a mounting plate 17 provided on the upper beam 13, and the lower support member 110 is inserted into a slit formed in the upper end of the stud 21 and bolted, thereby fixing the damper 100 to the upper beam 13 and stud 21, but this is not limited to this.

[0038] In this modified example, during an earthquake, the deformation portion 118 of the damper 100 deforms in response to the relative movement between the upper beam 13 and the floor slab 15 in the horizontal direction (the horizontal direction (X direction) in the plane of the partition 21), thereby obtaining a stable damping force and damping the shaking of the building.

[0039] Furthermore, a stable damping force can be obtained without increasing the size of the damper 100. Therefore, the dampers 100 can be spaced apart and the pipe 50 can be provided between them.

[0040] (Second usage example) In a second use example shown in Fig. 5, a damper 100 is provided between a steel beam 210 supporting a slab 212 and a steel beam 211 supporting a slab 213. A connecting part 200 such as an expansion joint or grating is provided between the slabs 212 and 213. In this use example, the damper 100 is provided so that the end surface 112 of the support member 110 is convex in the vertical direction (Z direction) and the arch-shaped part 120 is convex in the horizontal direction. Therefore, in this use example, the damper 100 exerts a damping force against the relative movement of the support member 110 in the vertical direction (Z direction).

[0041] In this modified example, when the steel beams 210 and 211 move relative to each other in the vertical direction, the deformation portion 118 of the damper 100 deforms and absorbs energy, thereby attenuating the relative movement between the steel beams 210 and 211 in the vertical direction.

[0042] (Third usage example) 6, a building 300 has a lower structure 310 and an upper structure 320. A seismic isolation device is installed at the bottom (not shown) of the lower structure 310, and the upper structure 320 is supported by a seismic isolation device (not shown). The damper 100 is provided between a cantilever-type slab (curtain) 312 extending from the outer periphery of the lower structure 310 and an upper edge 322 of the outer periphery of the upper structure 320 below the slab 312.

[0043] In this modified example, when the upper structural part 320 supported by the seismic isolation device moves horizontally relative to the lower structural part 310 during an earthquake, the deformation part 118 of the damper 100 deforms, thereby damping the shaking of the upper structural part 320.

[0044] (4th usage example) In the third use example shown in Fig. 7, damper 100 is installed between a residential section 402 of an apartment building 400 and a mechanical tower parking lot 420 that is rectangular in plan view and installed in an open void 410 inside the residential section 402. Note that in Fig. 7(B), damper 100 is illustrated in an orientation different from the actual one for ease of understanding, but in reality it is installed in the orientation of damper 100 in Fig. 7(A). Also, although Fig. 7 is a cross-sectional view, the hatching representing the cross section has been omitted.

[0045] As shown in Fig. 7(A), damper 100 has support member 110 bolted to plate 412 provided on the wall surface of void section 410. Also, as shown in Fig. 7(C), bolt hole 414 of plate 412 is an elongated hole. Note that bolt hole 414 is an elongated hole whose longitudinal direction is perpendicular to the direction along end face 112.

[0046] In this example, if the residential section 402 and the parking tower 420 move relative to each other in the Y direction during an earthquake, the deformation sections 118 of the dampers 100 provided on both sides of the parking tower 420 in the X direction will deform in the Y direction, absorbing energy and damping vibration. At this time, the dampers 100 provided on both sides in the Y direction will move relatively in the Y direction along the elongated bolt holes 414.

[0047] Similarly, when the residential section 402 and the parking tower 420 move relative to each other in the X direction, the deformation sections 118 of the dampers 100 provided on both sides of the parking tower 420 in the Y direction deform in the X direction, absorbing energy and damping vibration. At this time, the dampers 100 provided on both sides in the X direction move relatively in the Y direction along the elongated bolt holes 414.

[0048] <Other> The present invention is not limited to the above embodiment. For example, in the above embodiment and other use examples, the dampers 100 are arranged in a horizontal row, but this is not limiting. For example, the dampers 100 may be arranged vertically. In other words, the dampers 100 may be arranged in multiple stages.

[0049] Furthermore, for example, the damper 100 in the above embodiment is made by cutting a steel plate with a laser, but this is not limited to this. The damper 100 may also be die-cast. Alternatively, multiple members may be manufactured and integrated by welding. For example, the support member 110 and the deformation portion 118 may be manufactured separately and integrated by welding. Alternatively, two arch-shaped portions 120 may be manufactured and the apexes 122 may be welded together. Alternatively, the apexes 122 may be fastened together with bolts instead of being welded. Alternatively, the arch-shaped portion 120 may be manufactured by bending a round bar. Furthermore, the cross section of the arch-shaped portion 120 need not be rectangular, but may be a perfect circle or an ellipse.

[0050] Furthermore, for example, in the above embodiment, the deforming portion 118 of the damper 100 has a shape in which the apexes 122 of semicircular arch-shaped portions 120 with the same radius are connected to each other, but this is not limited to this. For example, the deforming portion may have a shape in which the apexes of semicircular arch-shaped portions with different radii are connected to each other. Alternatively, the arch-shaped portion may have an arc shape such as an ellipse or a quadratic curve, or a polygonal shape.

[0051] Furthermore, the present invention can be embodied in various forms without departing from the spirit and scope of the present invention. A plurality of embodiments and modifications can be implemented in combination as appropriate. [Explanation of symbols]

[0052] 100 Damper 110 Support member 112 End face 118 Deformed part 120 Arched section 122 Top 124 Root part

Claims

1. Two support members whose end faces are arranged parallel to each other and spaced apart on the same plane; a deformed portion in which apexes of arch-shaped portions extending in an arch shape from the end surface of the support member onto the same plane are connected to each other; Equipped with There is no central member disposed within the deformation portion, intersecting the top and linearly connecting the central portion of one of the support members to the central portion of the other of the support members. Damper.

2. The arched portion is semicircular. The damper of claim 1 .

3. The base of the arch-shaped portion is wider than other portions. The damper according to claim 1 or 2.

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