JPH06307122A - Damping device of multi-story building - Google Patents

Abstract

PURPOSE:To obtain the damping effect with a little mass, by controlling a variably leaning drive of an impeller installed at the outside of a building by a computer in accordance with the swing of building which an deceleration sensor equipped at the top of the building has detected. CONSTITUTION:In a strong wind condition, the magnitude of swing of both X-axis and Y-axis of a building A is detected by an acceleratuon sensor equipped on a plane at the top of the building A. The detected signals are input in the computer. Next, control signals are transmitted to each hydraulic cylinder 2 of a variably leaning drive P of an impeller body 1 by the computer. And the rods 3 of respective cylinders 2 is controlled to extend or contract and the angle is controlled in accordance with the displacement of building A at every impeller body 1 and the displacement of the building A is restricted.

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 high-rise buildings including buildings and works.

[0002]

2. Description of the Related Art Conventionally, in order to suppress or prevent rolling of a high-rise building due to wind or an earthquake, a weight having a mass corresponding to a building cycle is moved in a form in which the weight is synchronized in the opposite direction to the shaking direction of the building. Mass damper type vibration control devices that prevent shaking are widely used. In addition, there is a vibration damping device in which fins are provided on the four outer wall surfaces of the upper part of the building in several steps, and the fins are rotatably attached about the vertical axis between the flange pieces protruding laterally over the entire surface. It is disclosed in Japanese Patent Laid-Open No. 4-29767.

[0003]

The mass damper type vibration damping device is intended to attach a large mass to the top of a building and mainly to prevent swaying due to wind, but to attach a large mass to the top of the building, At the time of an earthquake, the weight of the earthquake caused a large acceleration, which had the opposite effect.

The latter damping device is a static structure in which fins are uniformly attached to each surface of the building, and it requires a large mass.
There is a problem that a complicated mechanism is required to obtain a large wind pressure control force by the fins, resulting in an increase in cost. The present invention has been proposed in view of the above problems of the prior art, and the object of the present invention is to obtain a large damping effect without requiring a large mass, a large amount of power, or the like. The point is to provide a vibration control device for high-rise buildings.

[0005]

In order to achieve the above-mentioned object, a vibration control system for a high-rise building according to the present invention comprises a wing body projecting from the outer surface of the building and a force applying device for varying the inclination angle of the wing body. An acceleration sensor that is installed on the top plane of the building and that detects the shaking of the X-axis and the Y-axis of the building, and inputs the shaking of the building that is detected by the acceleration sensor to apply a force for varying the tilt angle of the wing body. It consists of a computer that controls the device.

According to a second aspect of the present invention, the wing body is a convex lens-shaped cross-sectional view, and the length corresponding to the first floor of the building is one unit,
It is configured by connecting an appropriate number of units in series.

[0007]

[Operation] When a strong wind blows on a high-rise building, the building is swayed by the wind force, and the swaying becomes more remarkable as the building becomes higher. The present invention intends to control the shaking by varying the inclination angle of the wing body projecting on the outer surface of the building against the shaking.

The wing body changes the inclination of the wing body by applying the principle of the wing of an aircraft to generate lift. That is, as in the blade shown in FIG. 7, in the case of the wind direction parallel to the long axis of the blade, in the case of the blade of a, the air flow becomes uniform with respect to the blade and there is no resistance. In the case of the blade of b, a resistance force is generated in the air flow, and the pressure is lower than the atmospheric pressure on the upper surface of the blade and is higher on the lower surface of the blade. Therefore, the blade receives a force from the bottom to the top as shown by the arrow due to this pressure difference, and lift is generated. Conversely, in c, the downward force is received as indicated by the arrow.

The device of the present invention applies the same principle as that of the wing body of the aircraft described above, and adjusts the tilt angle of the wing body projecting to the outer surface of the building by the force adjusting device for varying the tilt angle of the wing body. It is intended to control vibration. That is, by using an accelerometer sensor installed on the plane of the top of the building to detect the shaking of the X-axis and the Y-axis of the building, the magnitude of the shaking of the building and the direction of the wind are sensed and these sensing signals are input to the computer. However, the computer controls the tilting force adjusting device for the wing body, and when the building feels a sway, the wing body changes its tilt angle in response to the direction of the sway, and the wing body tilt angle is opposite to the swaying motion. It acts in the direction to reduce the shaking of the building.

According to a second aspect of the present invention, the blades having a convex lens-shaped cross section, each of which has a length corresponding to the first floor of the building as one unit, are connected in series, and the angle of the blades is controlled according to the wind force hitting the building. The pressure difference is adjusted to perform control corresponding to the swing amplitude.

[0011]

The present invention will be described below with reference to the illustrated embodiments. A is a high-rise building. On the outer surface of the upper part of the building, vertical wing bodies 1 each having a convex lens-shaped cross section are mounted on the outer surface of the building at four corners as shown in FIG. 2 or at three points as shown in FIG. A force applying device for varying the inclination angle of the blade body is incorporated which changes the angle of the blade body 1 in the horizontal direction.

As shown in FIGS. 2 and 3, the tilting angle varying force device P of the wing body pivotally supports the wing body 1 at the tip of a rod 3 of a pair of hydraulic cylinders 2 whose base ends are fixed to the building A. Each of the hydraulic cylinders 2 is connected to a computer 4. The X-axis of the building A and the Y
An acceleration sensor m for detecting the swing of the shaft is connected to a computer 4 for controlling the hydraulic cylinder 2, and the computer 4 is connected to a force applying device P for varying the tilt angle of the wing body.

Since the illustrated embodiment is constructed as described above, the accelerometer sensor m detects the magnitude of the shaking of the X-axis and the Y-axis of the building A at the time of strong wind, and
The detection signal is input to the computer 4, and the computer 4
A detection signal is sent to each hydraulic cylinder 2 of the force applying device P for varying the inclination angle of the wing body to control the expansion and contraction of the rod 3 of each hydraulic cylinder 2 to respond to the displacement of the building A for each wing body 1. The angle of the wing body 1 is actively changed in response to the displacement of the building A, and the angle of each wing body 1 is controlled corresponding to the displacement of the building.

The wing body 1 has a length corresponding to the first floor as one unit, and by arranging appropriate units in series, the angle of the wing body is controlled according to the wind force hitting the building to adjust the pressure difference. However, it controls against the amplitude of the shaking of the building.

[0015]

As described above, the vibration control system for a high-rise building according to the present invention is provided with a wing body and a force adjusting device for varying the inclination angle of the wing body on the outer surface of the building. An acceleration sensor for detecting shaking of the axis and the Y-axis is arranged, and a computer for inputting a detection signal of shaking of the building in the X- and Y-axis directions by the acceleration sensor is controlled by the computer to control the force applying device. By actively changing the angle in response to the displacement of the building due to wind pressure and generating a force in a direction to suppress the deformation of the building, it is possible to suppress the building without using a large mass like the mass damper method.

Further, although the sway increases in proportion to the magnitude of the wind pressure, the control force exerted by the blade body also increases, and a rational damping effect can be obtained. Further, as the energy for damping, it is sufficient to change the direction of the wing body, so a small amount of power is sufficient, and a large amount of power for moving the mass damper as in the case of the mass damper is unnecessary.

Further, according to the present invention, since the blade body having a large reaction to the air flow is used, a reliable vibration damping effect can be obtained. According to the invention of claim 2, the wing body is formed in a convex lens-shaped cross section having a large reaction to the wind flow, the length corresponding to the first floor of the building is set as one unit, and an appropriate number of units are connected in series, whereby the structure is formed. By simplifying and performing control corresponding to the displacement of the building for each unit, an efficient vibration damping effect can be mentioned.

[Brief description of drawings]

FIG. 1 is an elevational view showing an embodiment of a high-rise building equipped with a vibration damping device according to the present invention.

FIG. 2 is a perspective view of a vibration damping device of the present invention.

FIG. 3 is a side view of the vibration damping device of the present invention.

FIG. 4 is a plan view showing an embodiment of a building equipped with the vibration damping device of the present invention.

FIG. 5 is a plan view showing another embodiment of a building including the vibration damping device of the present invention.

FIG. 6 is an explanatory diagram of a control device.

FIG. 7 is an explanatory view of the action of the wing body.

[Explanation of symbols]

 A Building P Force device for varying the tilt angle of the wing body m Accelerometer 1 Wing body 2 Hydraulic cylinder 3 Rod 4 Computer

Claims (2)

[Claims] 1. A wing body projectingly provided on an outer surface of a building and a force applying device for varying an inclination angle of the wing body, the wing body being installed on a top plane of a building,
An acceleration sensor for detecting shaking of the building along the X-axis and the Y-axis, and a computer for inputting the shaking of the building detected by the acceleration sensor to control the force applying device for varying the tilt angle of the wing body. Vibration control device for high-rise buildings. 2. The vibration control device for a high-rise building according to claim 1, wherein the wing body is a convex lens-shaped cross-sectional view, and the length corresponding to the first floor of the building is one unit, and an appropriate number of units are connected in series.