JPH074115A - Vibration control structure - Google Patents

Abstract

PURPOSE:To enable the vibration control of a supermultlstory building of a long period whose natural period is 6sec or more, in such a way that the structure of the device itself is simple and that the device can be housed in a relatively small space. CONSTITUTION:In the vibration control structure of a multistory building 10, a blowout hole 13 is formed in the inside of the inner tube of the multistory building 10 of a double tube construction consisting of an outer tube 11 and an inner tube 12, and a vibration control device 20a is suspended by the beam 14a of the floor level having the maximum amplitude 30 of the primary natural period. Further, a vibration control device 20b is also suspended by the beam 14b of the floor level having the maximum amplitude 31 of the secondary natural period.

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 high-rise buildings.

[0002]

2. Description of the Related Art Various damping devices have been used in conventional damping structures for high-rise buildings. As these damping devices, a pendulum-type tuned mass motion composed of a pendulum, a spring, an oil damper and the like is used. A vibration absorber, a tuned mass damper in which a multi-stage laminated rubber and a weight, etc. are combined, and a sloshing damper that uses resonance and internal damping action by sloshing of a liquid enclosed in a water tank are well known. Further, a vibration damping device including only a single pendulum as shown in FIG. 6 has been proposed. In addition, the multi-stage pendulum type vibration damping device (principle is shown in Fig. 5) applied to the Minato Mirai 21 skyscraper landmark tower is used for high-rise buildings with a height of 300 m and a natural period of 6 seconds or more. It is also well known that vibration control is possible.

[0003]

However, it is difficult to form a damping structure for a long period with a natural period of 6 seconds or more by using the pendulum type tuned mass dynamic absorber, the tuned mass damper and the sloshing damper described above. There is. Further, the vibration damping device constituted only by the single pendulum requires a large capacity device storage space in a high-rise building or the like having a long natural period because the suspension part is long and the amplitude is large, and thus the installation is practically impossible. There is a challenge of becoming possible. Although the multi-stage pendulum type vibration damping device (FIG. 5) can be applied to high-rise buildings, it has a problem that the structure of the device itself becomes complicated due to the multi-stage structure.

Therefore, the present invention has been made in view of the above-mentioned problems, and the structure of the device itself is simple and can be stored in a relatively small space, and a super-layer of a long period having a natural period of 6 seconds or more is obtained. An object is to provide a structure for controlling a building that enables the structure to be controlled.

[0005]

The present invention has been made to solve the above problems, and its gist is a vibration control structure for a high-rise building, wherein the vibration control means is the primary structure of the high-rise building. Arranged in a hierarchy having maximum amplitudes of one or more natural periods sequentially from the natural period, the damping means includes a simple pendulum and a damper, and the simple pendulum absorbs the vibration energy of the high-rise building. As described above, the damper damps the vibration of the simple pendulum, and thus the vibration control structure of a high-rise building is provided.

The floor having the maximum amplitude of the natural period described above is located in each floor according to the structural characteristics of each building.

[0007]

The damping device provided with the single pendulum and the damper of the present invention is provided for each layer having the maximum amplitude of the natural period of one or more orders sequentially from the first natural period of the high-rise building. It is set so as to sway so as to absorb the vibration energy of the high-rise building at the same cycle as the natural period of the high-rise building. As a result, when the building shakes, the simple pendulum swings, the inertial force of the simple pendulum acts in a direction to suppress the vibration of the building, and the damper damps the vibration of the simple pendulum.

[0008]

Embodiments will be described below with reference to the accompanying drawings.

FIG. 1 (a) is a front view of a high-rise building 10 having a double-tube structure as an example of a building to which the present invention is applied, and FIG. 1 (b) is A-A of FIG. 1 (a). 2 (a) is a sectional view taken along the line BB when the present invention is applied to the building shown in FIG. 1, and FIGS. 2 (b) and 2 (c) are the building 10 shown in FIG.
It is a conceptual diagram which shows the primary and secondary natural period response. The high-rise building vibration damping structure of the present invention shown in FIG. 2 forms a blow-through 13 inside the inner tube of a high-rise building 10 having a double-tube structure consisting of an outer tube 11 and an inner tube 12, and has a maximum primary natural period. The beam 14a is erected on a layer having an amplitude of 30, and the vibration damping device 20a is suspended on the beam 14a. Also,
Similarly, the beam 14b is also installed on the layer having the maximum amplitude 31 of the secondary natural period, and the vibration damping device 20b is suspended on the beam 14b.

As shown in FIG. 3, the vibration damping device 20a comprises a simple pendulum 21a and a damper 26a. This simple pendulum 21a includes a beam 14a installed on the blow-through 13,
The hanging portion 22a pin-bonded 25 to the beam 14a, the plate-shaped body 24a pin-bonded 25 to the hanging portion 22a, and the plate-shaped body 2
The damper 26a is composed of a cylinder 23 and a piston 41 that slides in the cylinder by hydraulic pressure, and is joined to the plate-shaped member 24a and the inner tube 12. For the hanging portion 22a, a suitable one is selected from linear building materials such as wires, carbon fibers or steel rods. In addition to the hydraulic pressure, the damper 26a is also
A suitable one is selected from conventional dampers such as springs, electromagnetics or mechanical friction. The vibration damping device 20b is also configured similarly to the vibration damping device 20a.

As described above, in this embodiment, a high-rise building having a double tube structure is illustrated as a building to which the present invention is applied. However, if the structure is such that a space for accommodating the vibration damping device is provided, the structure is particularly There is no limitation, and the installation position of the vibration damping device is limited to the hierarchy having the maximum amplitudes 30 and 31 of the primary and secondary natural cycles. How many levels of the present invention the maximum amplitude of the natural cycle is applied to Can be appropriately selected in accordance with the structural design requirements of the building.

Next, the operation of the vibration control structure for a high-rise building according to the present invention will be described with reference to FIGS. When an external force such as an earthquake or wind acts on the high-rise building 10
As shown in (b), the maximum amplitude 30 of the first natural period occurs in the uppermost layer of the building 10. At this time, the simple pendulum 21a of the vibration damping device 20a provided in the uppermost layer sways in the direction opposite to the inclination due to the vibration of the building 10 and in the same cycle as the primary natural period of the building, and the inertial force of the sway of the simple pendulum 21a Acts to absorb the vibration energy of the first natural period of the building 10,
Further, the damper 26a damps the vibration of the simple pendulum 21a and suppresses the amplitude of the simple pendulum 21a. When vibration of the secondary natural period occurs in the building 10 as shown in FIG. 2 (c) following the vibration of the primary natural period, the vibration damping device 20b operates in the same manner as the vibration damping device 20a, and the secondary natural period. Dampen the vibration of.

The single pendulum portion of the vibration damping structure of the present invention may be provided with an aerial garden as shown in FIG. FIG. 4 exemplifies a vibration damping device 20b in which a single pendulum 21b is provided with an aerial garden. This floating garden is provided on a plate-like body 24b, and a connecting plate 28 is joined to the end portion of the plate-like body 24b by a pin 27. The connecting plate 28 is overhang 2 fixed to the wall surface of the inner tube 12.
9 slidably abut on 9 to form an expansion joint. In addition, the weight of the aerial garden acts as the mass portion (weights 23a and 23b) of the above embodiment.

[0014]

As described above, according to the present invention, a simple structure and a comparatively large structure are provided, which are sequentially arranged from the first natural period of a high-rise building to the highest amplitude of the natural period of one or more orders. By combining a single pendulum type vibration control device that can be stored in a small space and a damper, vibration can be controlled by absorbing and damping the vibration energy of a super high-rise building with a long natural period. An aerial garden can be provided as the mass portion (weight) of the simple pendulum.

[Brief description of drawings]

FIG. 1 (a) is a front view of a high-rise building 10 having a double-tube structure as an example of a building to which the present invention is applied, and FIG. 1 (b) is A- of FIG. 1 (a). FIG.

2 (a) is a sectional view taken along the line BB when the present invention is applied to the building of FIG. 1, and FIGS. 2 (b) and 2 (c) are primary and secondary peculiarities of the building of FIG. It is a conceptual diagram which shows a periodic response.

FIG. 3 is a vibration damping device used in the present invention.

FIG. 4 is an example in which an aerial garden is formed as a mass portion in the vibration damping device of FIG.

FIG. 5 is a principle diagram of a multi-stage pendulum.

FIG. 6 is a principle view of a simple pendulum.

[Explanation of symbols]

 10 high-rise building 11 outer tube 12 inner tube 13 blow-through 14a, 14b beam 20a, 20b vibration control device 21a, 21b single pendulum 22a, 22b suspension part 23a, 23b weight 26a, 26b damper

Claims (1)

[Claims] 1. A vibration control structure for a high-rise building, wherein vibration damping means are sequentially arranged from a first natural period of the high-rise building to a layer having a maximum amplitude of one or more natural periods, The vibration damping means includes a simple pendulum and a damper, the simple pendulum swings so as to absorb the vibration energy of the high-rise building, and the damper damps the swing of the simple pendulum. Vibration control structure.