JP6940945B2 - Damping structure - Google Patents

Description

The present invention relates to a vibration damping structure that suppresses the shaking of a building.

Conventionally, diagonal lumber (brace) is attached in a cross shape in a rectangular vertical structure surface formed by columns and beams of a building to suppress the shaking of the building. Further, a vibration damping structure combining the diagonal lumber and a damper is also disclosed. For example, as shown in FIG. 6, diagonal lumber 103 is provided in a substantially cross shape in a rectangular space formed by a column portion 101 and a beam portion 102, and a damper 104 that is displaced in the horizontal direction is provided at an intersection of the diagonal members. The provided structure is known.

Further, in Patent Document 1, a damper is arranged in a vertical structural surface of a beam-column frame defined by an upper beam, a lower beam, and a column joined to the upper beam and the lower beam. In a vibration damping device in which the relative displacement in the horizontal direction between the upper beam and the lower beam due to the deformation of the vertical structural surface is transmitted to the damper, the upper end portion is fixedly joined to the side of the upper beam. A connecting structure having a pin joint at the lower end, one end of which is pin-joined to the side of the lower beam, the other end of which is pin-joined to one end of the damper, and an intermediate portion of the connecting structure. A structure including a beam member pin-joined to the pin-joined portion is disclosed.

Japanese Unexamined Patent Publication No. 2006-336208

However, in the conventional vibration damping structure shown in FIG. 6, the amount of displacement of the beam in the horizontal direction and the amount of displacement of the damper have a one-to-one relationship. In such a structure, when a large displacement occurs in the horizontal relative displacement (interlayer deformation) between the upper beam and the lower beam, the damper is also displaced and damaged by the same amount. There is a point.

Further, the vibration damping structure disclosed in Patent Document 1 does not have a one-to-one relationship between the amount of displacement of the beam in the horizontal direction and the amount of displacement of the damper, but it amplifies the interlayer deformation to form a damper. It is a transmission mechanism and is not suitable for preventing damage to the damper when a large displacement occurs.

In view of the above circumstances, it is an object of the present invention to provide a vibration damping structure provided with a damper, which can prevent damage to the damper even when a large displacement occurs due to interlayer deformation. ..

In order to solve the above problems, the vibration damping structure of the present invention has a column portion, a lower beam portion joined to the lower end side of the column portion, and an upper beam portion joined to the upper end side of the pillar portion. And the diagonal members connected to the lower end side of the pillar portion and the upper end side of the pillar portion, respectively, and the damper provided between the joint portion between the diagonal members and the lower beam portion or the upper beam portion. , It is characterized in that.

In the above configuration, the damper is provided between the joint portion between the diagonal members and the lower beam portion or the upper beam portion, so that the damper is relative to the horizontal displacement amount of the beam portion. The displacement amount of the damper can be reduced. As a result, it is possible to prevent the damper from being damaged even when a large displacement occurs in the interlayer deformation.

The damper may be movably provided in a plane where the pillar portion, the upper beam portion, the lower beam portion, and the diagonal member are present. Further, the damper may be provided in the vertical direction.

Further, the pillars may be provided at intervals of the design reference of the pillars, and the damper may be provided between the adjacent pillars.

Alternatively, the arrangement of the pillars at the design reference interval of the pillars may be omitted, and the damper may be provided at a place where the arrangement of the pillars is omitted.

Alternatively, even if the arrangement of the columns at the design reference interval of the columns is omitted and the damper is provided at a position closer to the columns to which the diagonal members are joined than the place where the arrangement of the columns is omitted. good.

Further, the damper may be a friction damper.

According to the present invention, in the vibration damping structure provided with the damper, even if a large displacement occurs in the interlayer deformation, it is possible to prevent the damper from being damaged.

It is a schematic structure diagram which showed the vibration damping structure which concerns on embodiment of this invention. It is explanatory drawing which showed the relationship between the displacement amount of a beam and the displacement amount of a damper when the interlayer deformation occurs in the vibration damping structure of FIG. It is explanatory drawing which showed the same relation as the displacement amount relation shown in FIG. 2 in the bearing wall of a narrow width. It is a schematic structure diagram which showed the vibration damping structure which concerns on other embodiment of this invention. It is a schematic structure diagram which showed the vibration damping structure which concerns on other embodiment of this invention. It is explanatory drawing which showed the conventional vibration damping structure.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the vibration damping structure 1 of the building of this embodiment has a column portion 2 in a steel-framed building and a lower beam portion (for example, a foundation) joined to the lower end side of the column portion 2. The underground beam) 3, the upper beam portion 4 joined to the upper end side of the pillar portion 2, and the two diagonal members 5 connected to the lower end side of the pillar portion 2 and the upper end side of the pillar portion 2, respectively. , 5 and a damper 6 vertically provided between the joint portion between the two diagonal members 5 and 5 and the lower beam portion 3 are provided. In this embodiment, the lengths of the two diagonal members 5 and 5 are the same, and the joint portion between the diagonal members 5 and 5 is located substantially in the middle of the height of the pillar portion 2.

The damper 6 includes a main body portion 6a and a movable portion 6b movably provided with respect to the main body portion 6a, and has a structure in which the movement of the movable portion 6b with respect to the main body portion 6a is restricted by a frictional force. It has become.

Further, in the damper 6, the lower end portion of the main body portion 6a is pin-joined to the support portion 6c fixed to the lower beam portion 3 with anchor bolts or the like by horizontally arranged pins, and the movable portion is formed. The upper end portion of 6b is pin-joined to the support portion 6d fixed to the joint portion between the diagonal members 5 and 5 by horizontally arranged pins, and the pillar portion 2, the beam portions 3, 4 and the above It is provided so as to be swingable in the plane where the diagonal members 5 and 5 are present. Further, the damper 6 is provided so that the moving direction of the movable portion 6b is the vertical direction in the non-oscillating state. In the installation of the damper 6, the main body portion 6a may be located on the upper side and the movable portion 6b may be located on the lower side. Further, the structure may be pin-joined, and the damper 6 may be connected to the support portion 6d or the support portion 6c by using a member such as a bolt or nut instead of the pin. ..

The pillar portion 2 shown by the solid line and the pillar portion 2 shown by the virtual line in FIG. 1 are provided at intervals of design reference of the pillar portions (for example, 1P or 2P (P is, for example, 910 mm)). The damper 6 exists between the adjacent pillars 2 in a state of being independent of the pillars 2 indicated by the virtual line.

FIG. 2 shows a case where the vibration damping structure 1 causes a relative displacement (interlayer deformation) in the horizontal direction between the lower beam portion 3 and the upper beam portion 4. Here, the height of the pillar portion 2 is n (n is larger than 1), and the distance from the pillar portion 2 to the damper 6 (vertically below the pin) is 1. In the case of a structural surface (aspect ratio 1: n), when A is generated as the amount of deformation in the horizontal direction, the amount of displacement generated in the damper 6 is A / n. That is, since the damper 6 is provided between the joint portion between the diagonal members 5 and 5 and the lower beam portion 3, the damper 6 is provided with respect to the relative horizontal displacement amount of the beam portions 3 and 4. The displacement amount of the damper 6 becomes relatively small. As a result, it is possible to prevent the damper 6 from being damaged even when a large displacement occurs in the interlayer deformation. In other words, the damper 6 having a small stroke amount can be used.

FIG. 3 shows a structure (narrow bearing wall) in the vibration damping structure 1 in which the distance between the pillar portion 2 and the damper 6 is shorter than the distance shown in FIG. As can be seen from FIG. 3, if the distance between the pillar portion 2 and the damper 6 is shortened, damage to the damper 6 can be prevented even with a larger horizontal displacement.

In the vibration damping structure 1 of the embodiment shown in FIG. 4, in the damper 6, the upper end portion of the main body portion 6a is pin-joined to the support portion 6c fixed to the upper beam portion 4 with bolts or the like, and the damper 6 is described. The lower end of the movable portion 6b is pin-joined to the support portion 6d fixed to the joint portion between the diagonal members 5 and 5. Even in such a structure, since the damper 6 is provided between the joint portion between the diagonal members 5 and 5 and the upper beam portion 4, the relative horizontal displacement amount of the beam portions 3 and 4 can be obtained. On the other hand, the displacement amount of the damper 6 can be relatively small. As a result, it is possible to prevent the damper 6 from being damaged even when a large displacement occurs in the interlayer deformation. In the installation of the damper 6, the main body portion 6a may be located on the lower side and the movable portion 6b may be located on the upper side.

Here, when the brace is provided in the cross arrangement, it is necessary that the pillars are present on both sides of the brace, but in the vibration damping structure 1 shown in FIGS. 1 and 4, the pillars 2 are present on both sides. It is not necessary to do so, and the pillar portion 2 shown by the virtual line can be omitted. That is, the arrangement of the pillars 2 on the design reference interval of the pillars is omitted, and the position closer to the pillars 2 where the diagonal members 5 and 5 are provided than the place where the arrangement of the pillars 2 is omitted is described above. The structure may be such that the damper 6 is provided.

In the vibration damping structure 1 of the embodiment shown in FIG. 5, the arrangement of the pillars (indicated by virtual lines) 2 on the design reference interval of the pillars is omitted. Then, the damper 6 is provided at a place where the arrangement of the pillar portion 2 is omitted. Even in such a structure, since the damper 6 is provided between the joint portion between the diagonal members 5 and 5 and the lower beam portion 3, the relative horizontal displacement amount of the beam portions 3 and 4 is provided. On the other hand, the displacement amount of the damper 6 can be relatively small. As a result, it is possible to prevent the damper 6 from being damaged even when a large displacement occurs in the interlayer deformation. In the vibration damping structure 1 shown in FIG. 5, the damper 6 may be attached to the side of the upper beam portion 4.

In these embodiments, the dampers 6 are provided in a vertical arrangement, but the present invention is not limited to this, and the dampers 6 may be arranged diagonally. Further, these vibration damping structures 1 can be provided not only on the first floor of the building but also on the upper floors. Further, although a friction damper is used as the damper 6, the damper is not limited to this, and an oil damper, a damper using a viscoelastic body, or the like can be used.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to those of the illustrated embodiments. Various modifications and modifications can be made to the illustrated embodiment within the same range as the present invention or within the same range.

1: Vibration damping structure 2: Pillar part 3: Lower beam part 4: Upper beam part 5: Oblique member 6: Damper 6a: Main body part 6b: Movable part 6c: Support part 6d: Support part

Claims (6)

The pillar portion, the lower beam portion joined to the lower end side of the pillar portion, the upper beam portion joined to the upper end side of the pillar portion, the lower end side of the pillar portion, and the upper end side of the pillar portion, respectively. It is provided with a connected diagonal member and a damper provided between the joint portion between the diagonal members and the lower beam portion or the upper beam portion.
The damper is pin-joined to the joint portion between the diagonal members and pin-joined to the lower beam portion or the upper beam portion, and the pillar portion, the upper beam portion, and the lower beam portion are joined. A vibration-damping structure characterized in that the portion and the diagonal member are provided so as to be swingable in the plane where the diagonal member exists. In the vibration damping structure according to claim 1, the damper is provided in the vertical direction. The vibration damping structure according to claim 1 or 2, wherein the pillars are provided at intervals of design reference of the pillars, and the damper is provided between the adjacent pillars. In the vibration damping structure according to claim 1 or 2, the arrangement of the pillars at the design reference interval of the pillars is omitted, and the damper is provided at the place where the arrangement of the pillars is omitted. The characteristic vibration damping structure. In the vibration damping structure according to claim 1 or 2, the arrangement of the columns at the design reference interval of the columns is omitted, and the diagonal members are joined to the locations where the arrangement of the columns is omitted. A vibration damping structure characterized in that the damper is provided at a position close to the pillar. The vibration damping structure according to any one of claims 1 to 5, wherein the damper is a friction damper.

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