JP2569262B2 - Structure damping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device for a structure, and more particularly to a vibration damping device for damping a vibration of a structure caused by wind pressure acting on a high-rise or super-high-rise structure. It is.

[0002]

2. Description of the Related Art At present, with a rise in height of a structure, a vibration phenomenon of the structure caused by a strong wind or the like has become a problem. In particular, in various high-rise towers and high-rise buildings, the entire structure is often formed in a flexible structure. Accordingly, the structure is easily affected by the wind pressure. For example, when the wind direction faces the structure, a periodic Karman vortex 20 is generated on the back surface of the structure 10 as shown in FIG.
0 causes a phenomenon that the structure 10 vibrates in a direction perpendicular to the wind.

Accordingly, if the generation of the Karman vortex can be suppressed, the vibration of the structure 10 can be greatly reduced, and a high-rise or super-high-rise structure with good livability can be obtained.

For this reason, a proposal has been made for a vibration damping device using a vibration damping blade (Japanese Patent Laid-Open No. 12047/1990).
No. 6, JP-A-4-297675).

For example, in the prior art disclosed in Japanese Patent Application Laid-Open No. 2-120476, as shown in FIGS. 7 and 8, a blade 2 is arranged at a corner of an outer wall on an upper floor of a structure 1. FIG. Then, the angle of attack of each blade 2 with respect to the wind is controlled so as to obtain the wind force applied to the blade 2 so as to reduce the vibration of the structure 1.

[0006]

As described above, in the conventional vibration damping device, only the blade direction of each blade 2 is controlled so as to suppress the vibration of the structure 1 due to the wind pressure.

However, in the conventional apparatus, since all the blades 2 are exposed to the outside of the structure 1, the blades unnecessary for vibration control also receive wind pressure, which causes various unexpected vibrations. There was a risk that it could be a trigger.

Furthermore, the blade 2 provided on the outer wall of the structure 1 cannot be provided with an excessively large blade due to restrictions on the installation space and the like, and this has been a cause that a sufficient damping effect cannot be exerted.

The present invention has been made in view of such conventional problems, and its object is to provide a structure by wind pressure,
In particular, it is an object of the present invention to provide a vibration damping device for a structure that can effectively suppress vibration of a high-rise or super-high-rise structure.

[0010]

In order to achieve the above object, the present invention relates to a vibration damping device for damping the vibration of a structure caused by wind pressure, wherein a wind detecting device detects a wind speed and a wind direction above the structure. A sensor and 2 above the structure
A vibration sensor for detecting a vibration in a direction, at least three vibration suppression wings vertically arranged above the structure and provided at predetermined intervals around the structure, and An air blower for air curtain creation provided on the wing, and damping wing control means for controlling each of the damping wings, wherein each of the damping wings is storable in the structure and in a wing direction. Is provided on the structure so as to be controllable, and the vibration suppression blade control means is configured to control the vibration of the structure based on the detection output of the wind sensor and the vibration sensor to the outside of the outer wall of each of the vibration suppression blades. In addition to calculating the amount of protrusion and the direction of the blades, the respective damping blades are controlled, and the respective air blowing sections are controlled.

[0011]

In the vibration damping device of the present invention, each vibration damping blade is formed so as to be housed in a structure, thereby preventing unnecessary vibration damping blades from disturbing the flow of wind and causing unexpected vibration. doing.

In addition to the above, according to the present invention,
An air outlet for creating an air curtain is provided. As a result, even if the damping wing itself is small, the effective length of the damping wing will be the sum of the length of the damping wing itself and the length of the air curtain. Thus, the same vibration damping effect can be obtained.

As described above, according to the present invention, it is possible to obtain a vibration damping device capable of effectively suppressing vibration of a structure without causing unexpected vibration.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows an example of a super-high-rise structure to which the present invention is applied. The super-high-rise structure 30 of the embodiment
Is formed in a substantially quadrangular prism shape, and a roof 32 has a wind sensor (wind direction / anemometer) 5 for detecting wind speed and direction.
0 and a vibration sensor (seismometer) 52 that detects vibrations of the structure 30 in two horizontal directions (x, y directions).

The super-high-rise structure 30 is provided with a damping blade 40 at each corner 36 on the side surface thereof. Each of the vibration suppression blades 40 is formed so as to be able to advance and retreat from inside the structure 30 to the outside by driving an actuator 48 described later. Further, as shown in FIG.
Numeral 0 is formed so as to be rotatable in the horizontal direction about the support shaft 42 in a state where it protrudes outside the structure 30. Therefore, by controlling the actuator 48 described later, the blade direction of the vibration suppression blade 40 can be set to an arbitrary direction.

FIG. 3 shows the structure of the damping wing 40. In the damping blade 40 of the embodiment, a plurality of air outlets 44 are formed at predetermined intervals at a front end thereof. The air supplied from the air blower 46 is supplied to each air outlet 44.
And an air curtain 70 having a predetermined width L2 is formed in front of the damping blade 40. The air curtain 70 is attached to the structure 3
It will receive the wind 100 blowing on 0. Therefore, the damping blade 40 functions substantially as large as the area L2 × H of the air curtain 70. That is, the damping blade 40 having the width L1 and the height H1 functions as a large damping blade having the width L and the height H.

FIG. 4 is a circuit diagram of the system according to the embodiment. In the system of the embodiment, the wind sensor (wind direction /
An anemometer 50a and an anemometer 50b are provided as the anemometer 50.

The wind speed and direction of the wind 100 above the super-high-rise structure 30 are determined by the sensors 50a and 50a.
It is detected at 50 b and input to the damping wing control circuit 60.

Further, when the wind 100 blows on the super-high-rise structure 30, various vibrations are generated above the structure,
In particular, Karman vortices are generated on the surface opposite to the surface on which the wind 100 is blown, which causes the structure 30 to vibrate in a direction perpendicular to the wind direction.

The vibration amount and the vibration direction of the super-high-rise structure 30 are detected by a vibration sensor 52 installed on the upper floor of the building so that two horizontal directions can be measured simultaneously. Is done.

The vibration suppression blade control circuit 60 is provided with the sensors 50
Based on the detection signals from a, 50b, and 52, each vibration suppression blade 40 is controlled so as to suppress the vibration of the super-high-rise structure 30.

More specifically, the vibration suppression blade control circuit 60 includes:
A projection length calculation unit 62, an air curtain length calculation unit 64, and a direction calculation unit 66 are included, and each of the vibration control blades 40 has a projection length l from the structure outer wall so as to suppress the vibration of the structure in accordance with the air volume and direction. The curtain length L2 and the blade direction are calculated for each damping blade 40. Then, based on the calculated values, the actuators 68 provided for the respective damping blades 40 are driven and controlled.

The actuators 68 provided corresponding to the respective damping blades 40 include the above-described air blowers 46 and the damping blade actuators 48 for moving the damping blades 40 forward and backward and in any direction. That is, each actuator 6
8 protrudes the corresponding damping blade 40 from the structure 30 to the outside based on the value of the protrusion length 1 calculated by the protrusion length calculation unit 62, and further dampens the vibration based on the blade direction calculated by the direction calculation unit 66. The wing 40 is turned in a predetermined direction. Further, the air blower 46 is driven based on the value calculated by the curtain length calculation unit 64, and forms an air curtain 70 having a predetermined length L2 in front of the damping blade 40.

FIG. 5 shows an example of the operation of the vibration damping device according to the embodiment.

Disturbing the regularity of the vortex generated around the structure 30 when the wind pressure acts on the super-high-rise structure 30 or separating the flow of the wind flowing behind the structure 30 Thereby, the generation and development of the Karman vortex can be effectively suppressed, and the structure 30 can be damped.

For this reason, in the embodiment, for example, FIG.
When the wind 100 hits from the front of the structure 30 as shown in FIG.
2 are projected outside the structure, and the air curtain 70 is formed to obtain a vibration damping effect.

As shown in FIGS. 5 (B) and 5 (C), when the wind 100 hits the structure 30 from an oblique direction, the damping blades 40 project from the structure 30 in accordance with the direction and amount of the wind. -1, 40-2, 40-4, and the amount of protrusion of each damping blade 40 and the length L2 of the air curtain 70.
Furthermore, the direction of each damping blade 40 is set to obtain a damping effect.

In particular, according to the embodiment, the damping wings 40 that do not contribute to the damping are housed inside the structure 30, and only the wings that contribute to the damping are projected outside the structure 30. Accordingly, it is possible to prevent the vibration-suppressing blades 40 that do not contribute to the vibration from being affected by the aerodynamic external force due to the wind from an arbitrary direction and causing various unexpected vibrations.

In addition to this, the damping wing 40 which contributes to damping
The air curtain 70 is formed as shown in FIG. 3, and the small damping blade 40 can exert the same effect as the large damping blade. As a result, the force of the wind 100 can be dispersed and the direction of the wind flow can be changed even if the small damping blade 40 is the same as the large damping blade, so that the vibration of the super-high-rise structure 30 can be effectively reduced. Can be suppressed.

Further, the damping blade 40 of the embodiment has a length L1.
Can be made compact, and can be compactly stored inside the structure 30, and the internal space of the structure can be effectively used.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention.

For example, in the above-described embodiment, the case where the damping blades 40 are provided at each corner 36 of the structure 30 has been described as an example. Is also good.

Further, in the above-described embodiment, the case where a total of four damping wings 40 are provided around the structure 30 has been described. However, depending on the structure 30, for example, three damping wings may be provided around the structure 30. 40 may be provided at equal intervals, or five or more damping wings 40 may be provided at predetermined intervals.

Further, in the above embodiment, the vibration damper 40
Although the thing of the structure stored inside the structure 30 was shown,
The present invention is not limited to this. If necessary, for example, as shown in FIG.

In the above embodiment, the case where the damping blade 40 is formed over a plurality of floors has been described as an example.
The structure in which the vibration suppression wing 40 is provided for each floor may be adopted.

[0037]

As described above, according to the present invention, the operation of the damping blade is actively controlled in accordance with the wind speed and direction acting on the structure, and the vibration of the structure is effectively suppressed. There is an effect that a vibration damping device that can perform the above operation can be obtained.

In particular, according to the present invention, the vibration-suppressing blade which does not contribute to vibration suppression is housed in a structure, whereby unexpected vibration is generated due to the effect of aerodynamic external force due to wind in an arbitrary direction. Can be prevented beforehand.

In addition to the above, according to the present invention, the air damper is provided with an air outlet to form an air curtain.
A large damping effect can be exhibited with small damping wings,
In addition, there is also an effect that the installation space of the damping wings on the structure can be reduced, and the internal space of the structure can be effectively used.

[Brief description of the drawings]

FIG. 1 is a schematic perspective explanatory view of a super-high-rise structure to which the present invention is applied.

FIG. 2 is an explanatory diagram of control of a blade direction of a damping blade.

FIG. 3 is a schematic explanatory view showing a structure of a vibration damper used in the embodiment.

FIG. 4 is a block diagram of the vibration damping system according to the embodiment.

FIG. 5 is an explanatory diagram illustrating an operation of the vibration damping system according to the embodiment.

FIG. 6 is an explanatory diagram of a damping blade storing operation of another embodiment.

FIG. 7 is a schematic explanatory view of a conventional vibration damping device.

FIG. 8 is a schematic plan view showing the operation of the vibration damping device shown in FIG. 7;

FIG. 9 is an explanatory diagram of Karman vortices generated around a structure by a wind flow.

[Explanation of symbols]

 REFERENCE SIGNS LIST 30 super high-rise building 40 damping blade 44 air outlet 46 air blower 50 wind sensor 52 vibration sensor 60 damping blade control circuit 70 air curtain

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masayuki Hayama 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Mamoru Okamoto 1-7-1 Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd. (72) Inventor Masahiko Suzuki 1-7-1, Kyobashi, Chuo-ku, Tokyo Toda Construction Co., Ltd.

Claims (2)

(57) [Claims] 1. A vibration damping device for damping vibration of a structure due to wind pressure, a wind sensor for detecting a wind speed and a wind direction above the structure, and detecting a vibration in two directions above the structure. A vibration sensor, at least three damping wings arranged vertically above the structure and provided at predetermined intervals around the structure, and provided on each of the damping wings. An air blowing section for creating an air curtain, and damping blade control means for controlling each of the damping blades, wherein each of the damping blades is housed in the structure and the blade direction is controllable. The vibration suppression blade control means is provided on a structure, and based on detection outputs of the wind sensor and the vibration sensor, the amount of protrusion of each of the vibration suppression blades to the outside of the outer wall, the blade Calculate the direction to control each of the damping wings Vibration damping device of a structure, characterized by controlling the respective air-blowing unit. 2. The damping blade control unit according to claim 1, wherein the damping blade control means controls the air blowing amount of each of the damping blades based on detection outputs of the wind sensor and the vibration sensor so as to suppress vibration of the structure. A vibration damping device for a structure, which calculates and creates an air curtain.