JP2020200702A - Vibration control structure - Google Patents

Abstract

To provide a vibration control structure which can effectively make the most of a structure plane of a column-beam frame while arranging a plurality of horizontal dampers in the one column-beam frame side by side and sufficiently absorbing energy.SOLUTION: In a vibration control structure in which a vibration control mechanism 4 having a plurality of horizontal dampers 41 imparting an attenuation force to a horizontal direction along a structure plane 3A in a column-beam frame such that a beam 2 is bridged between a pair of right and left columns 1, the plurality of horizontal dampers 41 are arranged side by side in the out-of-plane direction of the column-beam frame.SELECTED DRAWING: Figure 2

Description

In the present invention, a vibration damping mechanism equipped with a plurality of horizontal dampers for applying a damping force in the horizontal direction along the structural surface of a column-beam frame formed by extending a beam between a pair of left and right columns is installed. Regarding the vibration damping structure that is configured in

In Patent Document 1, vibration damping mechanisms provided in the column-beam frame are provided on one side of a substantially A-shaped frame (corresponding to a rigid member) and the tip (corresponding to a free end) of the frame. It is described that it has a plurality of horizontal dampers arranged vertically along the vertical direction.
Further, in Patent Document 2, vibration damping mechanisms provided in the column-beam frame are provided on both the left and right sides of the inverted V-shaped brace (corresponding to a rigid member) and the tip of the brace (corresponding to the free end). It is described that it has a plurality of horizontal dampers (4 in total) arranged vertically along the vertical direction.

Japanese Patent No. 3828695 JP-A-2018-135655

In the vibration damping structures of Patent Documents 1 and 2, a plurality of horizontal dampers can be arranged side by side on one beam-beam frame to absorb sufficient energy, but the plurality of horizontal dampers are located at different height positions. Since they are arranged, the area that blocks the structural surface of the column-beam frame tends to be large. Therefore, there is a demand for a vibration damping structure that can reduce the area that blocks the structural surface of the column-beam frame and facilitate the effective use of the column-beam frame.

In view of this situation, the main subject of the present invention is to effectively utilize the structural surface of the column-beam frame while arranging a plurality of horizontal dampers side by side on one column-beam frame to absorb sufficient energy. The point is to provide a vibration damping structure that can be facilitated.

The first characteristic configuration of the present invention includes a plurality of horizontal dampers that apply damping force in the horizontal direction along the structural surface of a column-beam frame formed by extending a beam between a pair of left and right columns. It is a vibration control structure that is configured by installing a vibration control mechanism.
A plurality of the horizontal dampers are arranged side by side and in parallel along the out-of-plane direction of the column-beam frame.

According to this configuration, a plurality of horizontal dampers can be arranged side by side in one column-beam frame to sufficiently absorb energy. Since the plurality of horizontal dampers are arranged at the same height position, the area for blocking the structural surface of the column-beam frame can be reduced, and the effective use of the column-beam frame can be facilitated.

In the second characteristic configuration of the present invention, one end in the vertical direction is fixed to the column-beam frame as a fixed end, and the other end in the vertical direction is not fixed to the column-beam frame as a free end in the vibration damping mechanism. Equipped with rigid members,
Each of the plurality of horizontal dampers is provided on one of the left and right sides of the free end of the rigid member so as to extend over the free end of the rigid member and one of the pillars.

According to this configuration, it is possible to configure a vibration damping mechanism in which a horizontal damper is provided between the free end of a rigid member (brace or the like) provided in the column-beam frame and the column. Then, in such a vibration damping mechanism, horizontal and horizontal dampers are arranged side by side at the same height position, so that even if the column beam frame is deformed in a state where the column changes from a vertical position to an oblique position in the event of an earthquake or the like, each The inputs to the horizontal dampers are easy to align, and the structural design can be simplified and the design work can be saved.
Further, since a plurality of horizontal dampers are integrated and installed on one side of the free end of the rigid member, sufficient energy absorption can be achieved even when the place where the damper can be installed is limited to the one side. ..

The third characteristic configuration of the present invention is that the free end of the rigid member is provided with a rigid member-side damper receiving member extending parallel to the arrangement direction of the plurality of horizontal dampers.
One of the pillars is provided with a pillar-side damper receiving member extending parallel to the arrangement direction of the plurality of horizontal dampers.
Each one end of the plurality of horizontal dampers is connected to the rigid member side damper receiving member.
Each of the other ends of the plurality of horizontal dampers is connected to the pillar-side damper receiving member.

According to this configuration, it is possible to rationally configure a vibration damping mechanism in which horizontal dampers are arranged side by side in parallel between the free end of the rigid member provided in the column-beam frame and the column.

The fourth characteristic configuration of the present invention is that the rigid member is arranged on the structural surface of the column-beam frame, and a plurality of the horizontal dampers are arranged symmetrically with respect to the structural surface of the column-beam frame. It is in.

Since a plurality of horizontal dampers are arranged symmetrically with respect to the structural surface (center of the column or rigid member) of the column-beam structure, twisting or the like is added to the column or rigid member (brace, etc.) to which the horizontal damper is connected. A plurality of horizontal dampers can be rationally integrated without applying stress.

Front view schematically showing the damping structure Section II-II sectional view of FIG. Enlarged front view of the main part of the damping structure

An embodiment of the vibration damping structure of the present invention will be described with reference to the drawings.
As shown in FIG. 1, this vibration damping structure is formed in a column-beam frame 3 formed by extending a pair of upper and lower beams 2 between a pair of left and right columns 1 in a building in a horizontal direction along the structure surface 3A of the column-beam frame 3. It is configured by installing a vibration damping mechanism 4 provided with a horizontal damper 41 that applies a damping force in the left-right direction of the frame.

Then, as shown in FIG. 2, in this vibration damping structure, a plurality of horizontal dampers 41 (two in this example) are orthogonal to the structural surface 3A of the column-beam frame 3 which is an example of the out-of-plane direction (the direction (2)). It is arranged side by side in parallel along the frame depth direction). Since a plurality of horizontal dampers 41 are arranged at the same height position, the area of the column-beam frame 3 that closes the structure surface 3A is small, and the column-beam frame 3 can be effectively used.

As shown in FIGS. 1 and 2, the vibration damping mechanism 4 has an upper end (an example of one end in the vertical direction) fixed to the column beam frame 3 as a fixed end, and the lower end (an example of the other end in the vertical direction) is free. A brace structure 42 (an example of a rigid member) which is not fixed to the column-beam frame 3 is provided as an end. The brace structure 42 is arranged on the structure surface 3A of the column-beam frame 3.

A damper connecting body 42A made of steel or the like is provided at the lower end of the brace structure 42. Each of the plurality of horizontal dampers 41 is provided on one of the left and right sides (right side in the drawing) of the lower end of the brace structure 42 over the damper connection 42A at the lower end of the brace structure 42 and the pillar 1 on one side. ing. The space between the damper connecting body 42A at the lower end of the brace structure 42 and the pillar 1 on the remaining one side (left side in the drawing) can be effectively utilized by arranging, for example, a door 5 or a passage.

As shown in FIG. 2, the plurality of horizontal dampers 41 are arranged symmetrically with respect to the structural surface 3A of the column-beam frame 3. In the example shown in FIG. 2, two horizontal dampers 41 are arranged on opposite sides by the same distance from the structure surface 3A. Therefore, a plurality of horizontal dampers 41 can be rationally integrated without applying additional stress such as twisting to the brace structure 42 or the column 1 to which the horizontal dampers 41 are connected. For example, the horizontal damper 41 may be further added to the structural surface 3A at the intermediate position between the two horizontal dampers 41.

The brace structure 42 is formed by assembling two diagonal members 42B made of a rigid material such as a steel material or reinforced concrete in a V shape, for example. The upper ends of the two diagonal members 42B as fixed ends are joined to the upper left and right column-beam joints (joint portions of columns 1 and 2) in the column-beam frame 3, and the two diagonal members as free ends. The upper part of the damper connecting body 42A is joined to the lower end of the 42B.

The damper connecting body 42A at the lower end of the brace structure 42 has a main body member 42a extending in the same direction as the horizontal damper 41 at the same height position as the horizontal damper 41 and a frame of the tip (right end in the drawing) of the main body member 42a. A pair of rigid member-side damper receiving members 42b extending parallel to the arrangement direction of the plurality of horizontal dampers 41 along the frame depth direction from both side surfaces in the depth direction are provided. The base end surface of the rigid member side damper receiving member 42b is joined to both side surfaces of the tip of the main body member 42a in the frame depth direction by welding or the like.

The main body member 42a is made of, for example, a mold material such as a square steel pipe or an H-shaped steel. As shown in FIGS. 2 and 3, for example, the rigid member side damper receiving member 42b includes a plurality of (for example, three) steel plate horizontal plate portions 42c arranged at intervals in the vertical direction in a horizontal posture. It is composed of a vertical plate portion 42d made of a steel plate, which is joined to the end faces of a plurality of horizontal plate portions 42c on the horizontal damper side (right side in the drawing) in a vertical posture.
Then, each of the one end portions 41A of the plurality of horizontal dampers 41 is connected to the vertical plate portion 42d of the rigid member side damper receiving member 42b via an attachment plate or the like by appropriate connecting means (not shown) such as bolts and nuts. It is connected. The horizontal force acting between the horizontal damper 41 and the vertical plate portion 42d can be appropriately received by the plurality of horizontal plate portions 42c.

To the pillar 1 on the right side in the figure to which the other end 41B of the horizontal damper 41 is connected, the upper and lower intermediate parts (the parts at the same height as the horizontal damper 41) are connected from both sides in the frame depth direction along the frame depth direction. A pair of pillar-side damper receiving members 43 extending parallel to the arrangement direction of the plurality of horizontal dampers 41 are provided. The base end surface of the column-side damper receiving member 43 is joined to both side surfaces of the upper and lower intermediate portions of the column 1 in the frame depth direction by welding or the like.

The pillar-side damper receiving member 43 can have, for example, the same configuration as the rigid member-side damper receiving member 42b, and is arranged in a horizontal posture at intervals in the vertical direction as shown in FIGS. 2 and 3. A vertical plate portion 43d made of steel plate that is joined to the end faces of a plurality of (for example, three) steel plate horizontal plate portions 43c and a plurality of horizontal plate portions 43c in a vertical posture on the horizontal damper side (left side in the drawing). It is composed of and.
Each of the other end portions 41B of the plurality of horizontal dampers 41 is connected to the vertical plate portion 43d of the column-side damper receiving member 43 by an appropriate connecting means (not shown) such as bolts and nuts. The horizontal force acting between the horizontal damper 41 and the vertical plate portion 43d can be appropriately received by the plurality of horizontal plate portions 43c.

In the vibration damping structure configured in this way, a plurality of horizontal dampers 41 extending over the lower end as the free end of the brace structure 42 and the pillar 1 are arranged side by side at the same height position, so that an earthquake occurs. Even if the column-beam frame 3 is deformed into a parallel quadrilateral while the column 1 is in an oblique position from a vertical position at times, the inputs to each horizontal damper 41 can be easily aligned, and the structural design is simplified accordingly. It is possible to save labor.

[Another Embodiment]
Other embodiments of the present invention will be described. The configurations of the respective embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

(1) In the above embodiment, the case where the rigid member side damper receiving member 42b and the column side damper receiving member 43 are configured by assembling a plurality of steel plates is shown as an example, but the present invention is not limited to this. It may be composed of a mold material such as a square steel pipe or a square steel pipe.

(2) In the above embodiment, the brace structure 42 is a rigid member in which one end in the vertical direction is fixed to the column-beam frame 3 as a fixed end and the other end in the vertical direction is not fixed to the column-beam frame 3 as a free end. Is shown as an example, but it may be a wall body having a hanging wall shape or a waist wall shape.

(3) In the above-described embodiment, the case where the rigid member is fixed to the column-beam frame 3 with the upper end as a fixed end and not fixed to the column-beam frame 3 with the lower end as a free end is shown as an example. On the contrary, the lower end may be fixed to the column-beam frame 3 as a fixed end, and the upper end may be fixed to the column-beam frame 3 as a free end.

1 Pillar 2 Beam 3 Pillar beam frame 3A Structure 4 Vibration damping mechanism 41 Horizontal damper 41A One end of horizontal damper 41B Other end of horizontal damper 42b Rigid member side damper receiving member 43 Pillar side damper receiving member

Claims (4)

It is configured by installing a vibration damping mechanism equipped with multiple horizontal dampers that apply damping force in the horizontal direction along the structure surface of the column-beam frame that extends the beam between the pair of left and right columns. It has a damping structure
A vibration damping structure in which a plurality of the horizontal dampers are arranged side by side and in parallel along the out-of-plane direction of the column-beam frame. The vibration damping mechanism is provided with a rigid member whose one end in the vertical direction is fixed to the column-beam frame as a fixed end and the other end in the vertical direction is not fixed to the column-beam frame as a free end.
The vibration damping structure according to claim 1, wherein each of the plurality of horizontal dampers is provided on one of the left and right sides of the free end of the rigid member over the free end of the rigid member and one of the pillars. The free end of the rigid member is provided with a rigid member-side damper receiving member extending parallel to the arrangement direction of the plurality of horizontal dampers.
One of the pillars is provided with a pillar-side damper receiving member extending parallel to the arrangement direction of the plurality of horizontal dampers.
Each one end of the plurality of horizontal dampers is connected to the rigid member side damper receiving member.
The vibration damping structure according to claim 2, wherein each of the other ends of the plurality of horizontal dampers is connected to the pillar-side damper receiving member. The vibration damping structure according to claim 2 or 3, wherein the rigid member is arranged on the structural surface of the column-beam frame, and a plurality of the horizontal dampers are arranged symmetrically with respect to the structural surface of the column-beam frame. ..

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