Vibration control structure

Abstract

To provide a vibration control structure capable of reducing an apparent aspect ratio of the vibration control structure as much as possible and effectively exerting damping force of the vibration control structure.SOLUTION: A vibration control structure 100 provided between an upper horizontal member 101 and a lower horizontal member 102 facing each other has a plurality of vibration control walls 110 provided side-by-side in the same plane. The vibration control wall 110 comprises: an outer case 210 fixed to the lower horizontal member 102 and having a storage space for a viscous fluid that suppresses relative displacement; an inner inserted wall 220 that hangs down from the upper horizontal member 101 toward the lower horizontal member 102, is fixed to the upper horizontal member 101 and is inserted into the storage space filled with the viscous fluid in a non-contact state with the outer case 210. The outer case 210 is formed with a vertical width greater than a horizontal width, and each of the vibration control walls 110 is held integrally by being coupled by a first coupling member 130a with sides of the outer case 210 of adjacent vibration control walls 110 adjacent each other.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vibration damping structure that absorbs vibration energy. [Background technology]

[0002] Architectural structures incorporate damping devices that absorb vibration energy caused by strong winds, earthquakes, etc., and these damping devices can improve the seismic safety of architectural structures. An example of such a damping device is the invention disclosed in Patent Document 1.

[0003] Patent Document 1 discloses an invention related to a viscous wall. The viscous wall includes a box body fixed to a lower beam and having an open top, a resistance plate fixed to the upper beam and disposed within the box body, and a viscous body accommodated inside the box body. When a relative horizontal force acts on the upper beam and the lower beam due to an earthquake or the like, the resistance plate and the box body are displaced in the horizontal direction, and this relative displacement causes shear strain in the viscous body. When shear strain occurs in the viscous body, a damping force is generated in proportion to the shear strain rate of the viscous body, and the horizontal displacement of the resistance plate and the box body is suppressed. As a result, repeated horizontal displacement of the upper beam and the lower beam can be suppressed, and vibration energy caused by earthquakes or the like can be absorbed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2014-152448 Summary of the Invention [Problem to be solved by the invention]

[0005] Due to the constraints imposed by the size of steel plates that can be transported (2.45m x 13.425m), when the width of the viscous wall product assembled in the factory is set to 2.45m or less, the height of the viscous wall product can be set to the maximum height that can be transported by a transport vehicle to the construction site of the building structure, such as 3.3m, but when the width of the viscous wall product is set to 2.5m or more (such as 4m), the height of the viscous wall product is limited to 2.55m. Therefore, when the viscous wall is fixed to a location with a large opening between the upper and lower beams of the building structure, with the height of the viscous wall product as large as possible, such as the maximum height that can be transported, such as 3.3m, the width of the viscous wall product cannot be set to 2.45m or more, so the aspect ratio of the viscous wall naturally becomes larger in height compared to width.

[0006] In such a viscous wall having a high product height and a large aspect ratio, when a resistance force acts between the box body and the resistance plate due to the relative displacement of the upper and lower beams, a large bending moment acts on the box body and the resistance plate, and there was a problem that the viscous wall was unable to exert the damping force expected due to the bending deformation of the box body and the resistance plate.

[0007] In addition, the box of the viscous wall is fixed to the lower beam by multiple mounting bolts, while the resistance plate of the viscous wall is also fixed to the upper beam by multiple mounting bolts, and when the large bending moment described above acts on the box and resistance plate, a large load is applied to the mounting bolts provided at both ends of the width direction of the box and resistance plate. One possible solution to this problem would be to increase the number of mounting bolts, but since the width of the viscous wall is limited in the first place, it is difficult to increase the number of mounting bolts, and it is necessary to increase the strength of each mounting bolt. However, in order to increase the strength of the mounting bolts, it is also necessary to increase the strength and thickness of the flange parts provided on the box and resistance plate to insert the mounting bolts, which results in an increase in the production cost of the viscous wall. [Means for solving the problem]

[0008] The present invention has been made in consideration of these problems, and an object of the present invention is to provide a vibration control structure that can suppress deformation of a vibration control wall with a large aspect ratio, while still effectively exerting a damping force, and can easily ensure the attachment strength of the vibration control wall to a structure.

[0009] In other words, the present invention is a vibration control structure that is provided in a structure between opposing upper horizontal members and lower horizontal members, and suppresses relative displacement between the upper horizontal member and the lower horizontal member, the vibration control structure having a plurality of vibration control walls arranged side by side in the same plane, the vibration control walls comprising an external case that is fixed to the lower horizontal member and has a storage space for a viscous fluid that suppresses the relative displacement, and an internal insertion wall that hangs down from the upper horizontal member toward the lower horizontal member and is fixed to the upper horizontal member and is inserted into the storage space filled with the viscous fluid without contacting the external case, the external case is formed so that its vertical width is greater than its horizontal width, and each vibration control wall is held together as a whole by the side surfaces of the external cases of adjacent vibration control walls being adjacent to each other and connected by a first connecting member. Effect of the Invention

[0010] According to the vibration control structure of the present invention, a plurality of vibration control walls arranged in the same plane are integrally held by a first connecting member. The vibration control walls have a large aspect ratio, which is the vertical width divided by the horizontal width, and the vibration control structure in which the vibration control walls are integrally held can have a smaller apparent aspect ratio than each of the vibration control walls. Therefore, the vibration control structure can suppress bending deformation generated in the external case and the internal insertion wall when a bending moment acts on the external case and the internal insertion wall due to the relative displacement of the upper horizontal member and the lower horizontal member, and can effectively exert a damping force. [Brief description of the drawings]

[0011] [Figure 1] 1 is a front view of a vibration damping structure according to one embodiment of the present invention; [Diagram 2] 1 is a perspective view of a vibration damping wall of a vibration damping structure according to one embodiment of the present invention. [Diagram 3] 11 is a front view showing a modified example of the first connecting member of the vibration damping structure according to one embodiment of the present invention. FIG. [Figure 4] 1 is a cross-sectional view of a seismic control wall according to an embodiment of the present invention, observed from above. FIG. [Diagram 5] FIG. 11 is a front view showing a modified example of a connecting member of the vibration damping structure according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The vibration damping structure of the present invention will be described in detail below with reference to the accompanying drawings.

[0013] FIG. 1 is a front view of a vibration-damping structure 100 according to one embodiment of the present invention. The vibration-damping structure 100 is a damping device that absorbs vibration energy generated by strong winds, earthquakes, and the like on a structure such as an architectural structure. The architectural structure shown in FIG. 1 is a rigid-frame structure in which a plurality of columns and a plurality of beams are joined. The vibration-damping structure 100 is provided between an upper horizontal member 101, which is a beam on the upper floor, and a lower horizontal member 102, which is a beam on the lower floor. The upper horizontal member 101 and the lower horizontal member 102 face each other, and the vibration-damping structure 100 suppresses relative displacement between the upper horizontal member 101 and the lower horizontal member 102.

[0014] In the following description, the space surrounded by the upper horizontal member 101, the lower horizontal member 102, and the two columns 103 that join the upper horizontal member 101 and the lower horizontal member 102 is referred to as a "plane." The vibration-damping structure 100 has a plurality of vibration-damping walls 110 arranged side by side in the same plane, a connecting frame 120 provided between the vibration-damping walls 110 and the beams, and a connecting member 130 that connects adjacent vibration-damping walls 110 to each other. In FIG. 1, two vibration-damping walls 110 are provided in the plane, but the number of vibration-damping walls 110 provided in the plane can be changed as appropriate.

[0015] 2 is a partially cut-out perspective view of the vibration damping wall 110. The vibration damping wall 110 has an outer case 210 having an accommodation space 200 therein, and an inner insertion wall 220 that is inserted into the accommodation space 200. The accommodation space 200 is filled with a viscous fluid 215 for suppressing the relative displacement between the upper horizontal member 101 and the lower horizontal member 102.

[0016] The external case 210 is configured in a box shape with an open top. The external case 210 is configured such that the vertical width is greater than the horizontal width, and is formed in a substantially rectangular shape in a plan view. Therefore, the aspect ratio of the external case 210, which is the vertical width divided by the horizontal width, is set to be large. The external case 210 is provided with respect to the lower horizontal member 102 so that the longitudinal direction of the external case 210 is vertical when the vibration control wall 110 is arranged in a plane. The external case 210 has a fixing portion 211 fixed to the lower horizontal member 102, a partition plate 212 provided in the accommodation space 200, and a pair of flange portions 213 provided on the side surfaces of the external case 210. The fixing portion 211 is provided with a plurality of bolt holes 214 for inserting a plurality of bolts for fixing the external case 210 to the lower horizontal member 102. The external case 210 is fixed to the lower horizontal member 102 by bolts inserted into the bolt holes 214. The partition plate 212 extends from the bottom of the outer case 210, i.e., from the fixing portion 211 toward the upper opening of the outer case 210. The storage space 200 is partitioned by the partition plate 212. The number of partition plates 212 provided can be changed as appropriate.

[0017] The flange portion 213 is provided on each long side of the outer case 210. When the vibration-damping walls 110 are arranged in the same plane, the flange portion 213 faces the flange portion 213 of the adjacent vibration-damping walls 110. The opposing flange portions 213 are connected to each other by a first connecting member 130a. The first connecting member 130a connects the side surfaces of the outer case 210 to each other, and has a connecting plate 131 and a bolt 132. In this way, the opposing flange portions 213 are connected to each other by the bolt 132 via the connecting plate 131, so that the adjacent outer cases 210 are integrally connected to each other. As a result, the vibration-damping walls 110 arranged in the plane are held integrally. In this way, the vibration-damping structure 100 in which a plurality of vibration-damping walls 110 are held integrally has a small apparent aspect ratio because the vibration-damping walls 110 with a large aspect ratio are adjacently connected. In this embodiment, the first connecting member 130a is composed of a connecting plate 131 and a bolt 132, but is not limited thereto. As long as the adjacent outer cases 210 can be integrally connected to each other, the design can be appropriately changed. For example, the connecting plate 131 may be replaced with an H-shaped steel, and the flange portion of the H-shaped steel and the flange portion 213 of the outer case 210 may be connected with the bolt 132, or as shown in FIG. 3, the entire outer case 210 may be integrally connected using a steel material such as a channel steel. FIG. 4 is a cross-sectional view of the seismic control wall 110 when the channel steel 130a is provided to the outer case 210, and the channel steel 130a is provided across the adjacent outer cases 210. The channel steel 130a is fixed to the flange portion 213 of the outer case 210 by a bolt or the like. The channel steel 130a is provided on the front and back of the outer case 210, and in the cross-sectional view of FIG. 4, the seismic control wall 110 is sandwiched between the channel steel 130a provided on the front and back of the outer case 210.

[0018] The internal insertion wall 220 is formed in a substantially rectangular shape in a plan view. The internal insertion wall 220 is provided to the upper horizontal member 101 so that the longitudinal direction of the internal insertion wall 220 is vertical when the seismic control wall 110 is arranged in a plane. The internal insertion wall 220 has a fixing part 221 fixed to the upper horizontal member 101, and one or more damping plates 222 provided on the fixing part 221. The fixing part 221 is provided with a plurality of bolt holes 223 for inserting a plurality of bolts for fixing the internal insertion wall 220 to the upper horizontal member 101. The internal insertion wall 220 is fixed to the upper horizontal member 101 by bolts inserted into the bolt holes 223.

[0019] The fixing portion 221 is provided with two damping plates 222 facing the bottom surface of the external case 210. Each damping plate 222 is inserted into each space partitioned by the partition plate 212 in the storage space 200 of the external case 210. The damping plate 222 is in a non-contact state with the external case 210 in the storage space 200. That is, the lower end side of the damping plate 222 of the internal insertion wall 220 is not supported, and the damping plate 222 is suspended from the upper horizontal member 101 toward the lower horizontal member 102 and fixed to the upper horizontal member 101. When the internal insertion wall 220 is inserted into the storage space 200 of the external case 210, a part of the damping plate 222 is immersed in the viscous fluid 215 in the storage space 200. In this embodiment, two damping plates 222 are provided, but the number of the damping plates 222 can be appropriately changed according to the required damping force.

[0020] The lower horizontal member 102 is provided with a lower connecting frame 120a that integrally holds each of the vibration-damping walls 110. The lower connecting frame 120a is provided between the outer case 210 and the lower horizontal member 102. The lower connecting frame 120a can hold the lower ends of the outer cases 210 of the multiple vibration-damping walls 110 provided in the same plane. This allows the lower connecting frame 120a to integrally connect the multiple outer cases 210. Each outer case 210 is fixed to the lower horizontal member 102 via the lower connecting frame 120a. The connecting frame 120 also has a role of adjusting the height so that the height of the plane and the height of the vibration-damping walls 110 are approximately the same.

[0021] The upper horizontal member 101 is provided with an upper connecting frame 120b that integrally holds each of the vibration damping walls 110. The upper connecting frame 120b is provided between the internal insertion wall 220 and the upper horizontal member 101. The upper connecting frame 120b can hold the upper ends of the internal insertion walls 220 of the multiple vibration damping walls 110 provided in the same plane. This allows the upper connecting frame 120b to integrally hold the internal insertion walls 220 of adjacent vibration damping walls 110. The internal insertion walls 220 are fixed to the upper horizontal member 101 via the upper connecting frame 120b.

[0022] 5, the vibration damping structure 100 has a second connecting member 130b for connecting the internal insertion walls 220 to each other. The second connecting member 130b is configured as a substantially rectangular plate, and is disposed across each internal insertion wall 220. The second connecting member 130b is fixed to each internal insertion wall 220 by a bolt or the like. This makes it possible to hold the adjacent internal insertion walls 220 together as a unit.

[0023] When a horizontal relative displacement occurs between the upper horizontal member 101 and the lower horizontal member 102 of the structure due to an earthquake or the like, the inner insertion wall 220 is displaced in the same direction as the upper horizontal member 101, and the outer case 210 is displaced in the same direction as the lower horizontal member 102. That is, the inner insertion wall 220 and the outer case 210 are displaced in different directions. At this time, the damping plate 222 of the inner insertion wall 220 is displaced while contacting the viscous fluid 215 in the accommodation space 200 of the outer case 210. The inner insertion wall 220 and the outer case 210 are displaced relative to each other by reciprocating with the relative displacement between the upper horizontal member 101 and the lower horizontal member 102, and the damping plate 222 swings reciprocatingly within the accommodation space 200.

[0024] When the damping plate 222 swings in the accommodation space 200, a shear force acts on the viscous fluid 215 in contact with the damping plate 222. When a shear force acts on the viscous fluid 215, a shear resistance of the viscous fluid 215 is generated, and the relative displacement between the external case 210 and the internal insertion wall 220 is suppressed. As a result, the relative displacement between the upper horizontal member 101 to which the internal insertion wall 220 is fixed and the lower horizontal member 102 to which the external case 210 is fixed is suppressed. That is, the shear resistance of the viscous fluid 215 acts on the upper horizontal member 101 and the lower horizontal member 102 via the external case 210 and the internal insertion wall 220. As a result, the vibration control structure 100 can absorb vibration energy for a structure.

[0025] In the vibration control structure 100 of the present invention, the side surfaces of the outer cases 210 of the multiple vibration control walls 110 provided in the same plane are adjacent to each other and connected by the first connecting member 130a. As a result, the multiple vibration control walls 110 provided in the same plane are held together. Therefore, the vibration control structure 100 can determine the number of vibration control walls 110 provided in the same plane according to the size of each vibration control wall 110, and by holding these vibration control walls 110 together, the aspect ratio of the vibration control structure 100 can be adjusted as desired. As a result, even if the aspect ratio of the vibration control wall 110 is large, the vibration control structure 100 can make the apparent aspect ratio of the vibration control structure 100 as small as possible by connecting multiple vibration control walls 110. Therefore, the vibration control structure 100 can suppress the bending deformation that occurs in the external case 210 and the internal insertion wall 220 when a bending moment acts on the external case 210 and the internal insertion wall 220 due to the relative displacement between the upper horizontal member 101 and the lower horizontal member 102, and can effectively exert a damping force.

[0026] Moreover, the vibration control structure 100 can further suppress bending deformation of the outer case 210 by integrally holding the outer cases 210 of the vibration control walls 110 with the lower connecting frames 120a. Furthermore, the vibration control structure 100 can further suppress bending deformation of the inner inserted walls 220 by integrally holding the inner inserted walls 220 of the vibration control walls 110 with the upper connecting frames 120b. In this way, the vibration control structure 100 suppresses bending deformation of the outer case 210 and the inner inserted wall 220 because the vibration control walls are integrally held with the connecting frames 120, which contributes to effective exertion of the damping force.

[0027] 3 and 4, the first connecting member 130a is made of a channel steel, and the channel steel 130a is provided at the center and upper part of the outer case 210. The channel steel 130a spans between adjacent outer cases 210, and can suppress bending deformation of the center and upper part of the outer case 210. In this way, by making the first connecting member 130a the channel steel, the first connecting member 130a can achieve the effect of suppressing bending deformation of the outer case 210.

[0028] Furthermore, while conventional viscous walls have a large aspect ratio and a large load is applied to the bolts provided at both ends of the bolts for connecting the viscous wall to the beam, the vibration-damping structure 100 of the present invention can reduce the aspect ratio as much as possible, thereby reducing the load on the bolts more than conventional viscous walls. Therefore, the vibration-damping structure 100 can be designed to be sufficiently resistant to vibrations caused by earthquakes and the like without reinforcing the structure by increasing the number of bolts or improving the strength of the fixing part 211 of the outer case 210 or the fixing part 221 of the damping plate 222.

[0029] The present invention is not limited to the embodiment described above, and can be implemented in various forms. For example, the upper connecting rack 120b may be omitted depending on the installation space. In addition, in Fig. 3 and Fig. 4, the entire outer case 210 is integrally connected using four steel members such as channel steel members, including those in the front-rear direction, but there is no limit to the connecting positions or the number of steel members such as channel steel members. [Explanation of symbols]

[0030] 100... vibration-damping structure, 101... upper horizontal member, 102... lower horizontal member, 110... vibration-damping wall, 120... connecting frame, 130... connecting member, 200... accommodation space, 210... outer case, 215... viscous fluid, 220... inner insertion wall

Claims

1. A vibration control structure provided between an upper horizontal member and a lower horizontal member facing each other in a structure, the vibration control structure suppressing relative displacement between the upper horizontal member and the lower horizontal member, The vibration control structure has a plurality of vibration control walls arranged in the same plane, The seismic damping wall is an outer case fixed to the lower horizontal member and having a space for containing a viscous fluid that suppresses the relative displacement; an inner insertion wall that is suspended from the upper horizontal member toward the lower horizontal member and fixed to the upper horizontal member and is inserted into the accommodation space filled with the viscous fluid in a state of not contacting the outer case; Equipped with The outer case is formed so that its vertical width is greater than its horizontal width, A vibration-damping structure characterized in that the sides of the outer cases of adjacent vibration-damping walls are adjacent to each other and connected together by first connecting members to be held together as a single unit.

2. The vibration control structure includes a lower connecting frame fixed to the lower horizontal member, The outer case is fixed to the lower horizontal member via the lower connecting frame, 2. The vibration control structure according to claim 1, wherein the lower connecting frame is capable of holding a lower end of the outer case of each vibration control wall and integrally connecting the plurality of vibration control walls.

3. The vibration control structure has an upper connecting frame fixed to the upper horizontal member, The inner insertion wall is fixed to the upper horizontal member via the upper connecting frame, 3. The vibration control structure according to claim 1, wherein the upper connecting frame holds upper ends of the inner insert walls of each vibration control wall and is capable of integrally connecting the vibration control walls.

4. 3. The vibration damping structure according to claim 1, wherein the inner insert plates of adjacent vibration damping walls are connected to each other by a second connecting member.

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