JPH07269165A - Vibration control structure - Google Patents

Abstract

PURPOSE:To effectively restrain the shaking of a structure by locally fixing vibration-control pillars arranged in a tower-shaped building body or the neighborhood thereof to the foundation or the building body, and connecting the vibration-control pillars to the building body with pins, and also by connecting them with dampers. CONSTITUTION:A plurality of vibration-control pillars 2 are arranged in the neighborhood of a tower-shaped building body 1, and the respective lower ends of the vibration-control pillars 2 are fixed to the foundation that has been formed in the ground G. Further, the vibration-control pillars 2 and the building body 1 are connected by means of pins through a large number of links 3, and also they are connected by means of a large number of dampers 4. When the building body 1 receives a horizontal force due to an earthquake or the like, a large overturning moment is caused, and such a large bending deformation as the one side of the building body is extended and the other side thereof is contracted is produced. Howerver, since the vibration-control pillar 2 does not partake the overturning moment, the deformation in the axial direction of a member is not produced. Thus, a large relative deformation is produced to the respective parts of the vibration-control pillars 2 and the building body 1 that have been connected by both the links 3 and the dampers 4. At that time, the damper 4 resists, and becomes a large resistance for retaining the bending deformation of the building body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control structure for suppressing shaking caused by strong winds and earthquakes.

[0002]

2. Description of the Related Art In a slender tower-like building or a super high-rise building, a strong wind or an earthquake causes a considerable sway, which easily causes a strong discomfort or anxiety to an inside person. In order to suppress such shaking as much as possible, a vibration damping device having various structures called, for example, an active mass damper has been developed and is being applied to an actual building.

[0003]

The conventional vibration damping device is a device mainly intended for shear deformation of a building due to an earthquake or horizontal force of a wind. No effect can be expected when applied to or high-rise or super-high-rise buildings.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to effectively suppress the sway mainly due to the bending deformation of a long and tall building. To provide.

[0005]

A vibration control structure of the present invention has a plurality of vibration control columns arranged in or around a tower-shaped building body, and the vibration control columns are locally used as a foundation or While being fixed to the building body, the damping column and the building body are pin-coupled via a number of links, and the damping column and the building body are coupled with a number of dampers. is there.

[0006]

When a large horizontal force such as an earthquake is applied to the above-mentioned structure according to the present invention, a large overturning moment is generated in the main body of the building, which causes one side portion to expand and the other side portion to contract greatly. Occurs. However, since the damping column does not bear the overturning moment, axial deformation of the member does not occur. Therefore, a large relative deformation occurs in the vibration damping column and the part of the building body, which are connected to the link by the damper. The damper provided in that part resists this relative deformation, and becomes a large resistance force that suppresses bending deformation of the building body as a whole.

[0007]

FIG. 1 shows a schematic structure of a vibration damping structure according to an embodiment of the present invention. As shown in the figure, the basic structure of this damping structure is that a plurality of damping columns 2 are arranged around a tower-shaped building body 1, and the lower ends of the damping columns 2 are formed on the ground G. While being fixed to the foundation, the damping column 2 and the building body 1
Are connected to each other via a number of links 3 and the damping columns 2 and the building body 1 are connected to each other by a number of dampers 4.

FIG. 2 shows four examples of the positional relationship between the building body 1 and the damping columns 2 on the plan view. In the example of FIG. 2 (A), damping columns 2 are erected on the outer sides of the four corners of a building body 1 having a square plane cross section. In the example of FIG. 2B, damping columns 2 are erected on the outside of the center of the four surfaces of the building body 1 having a square plane cross section. In the example of FIG. 2 (C), the building main body 1 having the shape in which the recesses 1a are provided at the four corners of the square is provided with the damping columns 2 so as to be placed within the recesses 1a. In the example of FIG. 2 (D), with respect to the building main body 1 in which the recesses 1b are provided at the centers of the four sides of the square, the damping columns 2 are erected so as to fit within the recesses 1b. . By adopting the configuration shown in FIGS. 2C and 2D, it is possible to make the appearance of the building almost the same as that of a normal building in which the damping columns 2 are integrated with the building body 1.

The links 3 connecting the damping columns 2 and the building body 1 with pin joints are arranged at a predetermined interval in the height direction. In the example of FIG. 1, the links 3 are arranged at the heights of two floors of the building body 1, and the building body 1 of 10 floors and each damping column 2 are connected by five links 3. Has been done. Here, the space between the links 3 will be referred to as a basic partition. In the example of FIG. 1, since the building body 1 is a 10-story building, five basic sections are formed by the five links 3 arranged in the vertical direction for each damping column 2. And as shown in FIG. 1, the damper 4 is arrange | positioned every other five basic divisions.

As the damper 4, a hysteresis damping type or a viscoelastic type is used, and both ends of the damper 4 are damping columns 2.
And firmly fixed to the building body 1. Damper 4
Generates a large resistance force to the displacement between the fixing points at both ends thereof.

FIG. 1 (B) shows the state of bending deformation when a large horizontal force such as an earthquake is applied to the vibration control structure of FIG. 1 (A). Building body 1 under horizontal force such as earthquake
Causes a large overturning moment and one side extends,
Large bending deformation occurs with the other side shrinking. But,
Since the damping column 2 does not bear the overturning moment, no axial deformation of the member occurs. Therefore, a large relative deformation occurs in the vibration damping column 2 and the partial portion (each basic section) of the building body 1 which are connected by the link 3 and the damper 4. The damper 4 provided in that part resists this relative deformation, and becomes a large resistance force that suppresses the bending deformation of the building body 1 as a whole.

FIG. 3 shows a schematic configuration of another embodiment of the present invention. The building body 1 of this example is an 18-story building, and the damping columns 2a to 2c arranged around the building body 1 are vertically divided into three. The lowest damping column 2a is erected on the foundation of the ground G and reaches the 6th floor of the building body 1, and the links are respectively arranged on the 2nd floor ceiling part and the 4th floor ceiling part in between. It is pin-joined to the building body 1 by 3. A damper 4 is arranged in each of the basic sections above the links 3 to connect the damping column 2a and the building body 1 to each other.

A projecting beam 5a projecting outward is provided on the ceiling portion of the 6th floor of the building body 1, and the second damping column 2 is provided.
The lower end of b is fixed to this protruding beam 5a. Further, links 3 are arranged on the ceiling portion of the 8th floor and the ceiling portion of the 10th floor of the building body 1, and the damping columns 2 are connected through the links 3.
b and the building body 1 are pin-joined. Further, dampers 4 are respectively arranged on the basic partition portions on both links 3 to connect the vibration damping column 2b and the building body 1 to each other.

Similarly, a projecting beam 5b projecting outward is provided at the ceiling portion of the 12th floor of the building body 1, and the lower end of the third damping column 2c is fixed to this projecting beam 5b. Further, the links 3 are respectively arranged on the 14th floor ceiling portion, the 16th floor ceiling portion and the 18th floor ceiling portion of the building body 1,
The vibration damping column 2c and the building body 1 are pin-joined to each other via the link 3. Further, dampers 4 are respectively arranged in the basic partition portions above the two lower links 3 to couple the damping columns 2c and the building body 1.

The damping mechanism in the embodiment of FIG. 3 is the same as that of the embodiment of FIG. That is, when a large overturning moment is generated in the building body 1 due to a horizontal force such as an earthquake, a large bending deformation occurs in which one side portion expands and the other side portion contracts. However, since the vibration damping columns 2a, 2b, 2c do not bear the overturning moment, axial deformation of the members does not occur. Therefore, large relative deformation occurs in the vibration damping columns 2a, 2b, 2c connected by the link 3 and the damper 4 and the partial portions (each basic section) of the building body 1. The damper 4 provided in that part resists this relative deformation, and becomes a large resistance force that suppresses the bending deformation of the building body 1 as a whole. Particularly, in this embodiment, since the vibration damping columns 2a to 2c are vertically divided into three parts,
Not only the fundamental vibration mode of the bending deformation vibration of the building body 1 but also the secondary or tertiary vibration mode has a great damping effect.

In the above embodiment, the damping columns arranged around the building body 1 have been described as an example. However, the building columns are not constructed separately as described above, but are incorporated in a structural plan to construct the building body. The column forming a part of 1 may be made to function as a damping column.

[0017]

As described in detail above, according to the vibration control structure of the present invention, it is possible to effectively suppress the sway mainly due to the bending deformation of a long and tall building. Also, structurally, it is a very simple thing to connect the damping column attached to the outer side of the building body and the building body with a pin through a link and also with a damper. It can be applied to buildings relatively easily, and a large damping effect can be expected.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram (A) of a vibration damping structure according to a first embodiment of the present invention, and an explanatory diagram (B) of a state in which it is subjected to bending deformation.
Is.

FIG. 2 is a plan view showing four examples of a planar arrangement relationship between a building body and four damping columns in the same embodiment.

FIG. 3 is a schematic configuration diagram of a vibration damping structure according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Building body 2, 2a, 2b, 2c Damping column 3 Link 4 Damper 5a, 5b Projecting beam

Claims (1)

[Claims] 1. A plurality of damping columns are arranged in or around a tower-shaped building body, and the damping columns are locally fixed to the foundation or the building body, and the damping columns are also provided. And the building body are pin-coupled to each other via a number of links, and the damping column and the building body are coupled to each other with a plurality of dampers.