JPH06307117A - Damping structure of mega-structure brace frame assembled with damper unit - Google Patents

Abstract

PURPOSE:To reduce oscillation of a buiding constructed by mega-structure method, due to earthquakes and wind. CONSTITUTION:The axial ends of each same directional brace 4a, 4b (5a, 5b) in the crossing of at least one of brace 4(5) of the outer peripheral side brace frame 2 and the inner peripheral side brace frame 3 of a building, are connected to each other through a damper unit 10 so as to be transferable to mutually reverse directions. In this way, horizontal vibrations of the building due to earthquakes and wind can be attenuated by the damper unit 10. Vibrations of the wide range from a small amplitude to a large amplitude can be attenuated by use of a frictional damper, a rotary damper, etc., as the damper unit 10.

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 of a megastructure frame structure in which vibration of a structure due to an earthquake or wind is reduced by a damper unit incorporated at an intersection of braces.

[0002]

2. Description of the Related Art Conventionally, as a passive vibration control structure for a structure, there is a method of giving a large damping to a part of a building frame, that is, an earthquake resistant wall or a brace. An elasto-plastic damper utilizing a non-linear characteristic such as a viscoelastic body, friction, or a steel material is used to impart damping. These systems are designed to dissipate energy by the deformation of the damper to obtain a damping effect, and the damping effect cannot be exhibited unless the amplitude level becomes large.

On the other hand, in recent years, buildings with megastructure frames have begun to be constructed, but there is no one that can be expected to have a vibration damping effect by adding a damping mechanism to them.

[0004]

The vibration damping structure described above is of a passive type, in which the structure is deformed and the damper receives the deformation to dissipate the energy. Therefore, the effect of the damper cannot be obtained at the time of slight deformation, and the damping effect cannot be exhibited unless the amplitude level becomes large. Also, the system must be placed in each layer, which makes installation difficult. In addition, in order to deform the damper, it may be necessary to specially consider the frame design, for example, to increase the rigidity of the beam.

In the case of a megastructure frame, there is currently no one that provides a damping mechanism. However, if it is possible to attach a damping device to the megastructure frame, the deformation will be large because the frame is large, the vibration damping effect can be expected from a micro level compared to the above vibration damping device, and the number of places to install the system will be small. There are advantages. This invention
It is an object of the present invention to solve the above problems and construct a vibration damping structure that can expect a vibration damping effect from a small amplitude level to a large amplitude level by installing a few devices.

[0006]

In order to achieve the above object, according to the present invention, the axial end of each brace in the same direction at the intersection of at least one of the brace on the outer peripheral side and the inner peripheral side of the building by the megastructure construction method. The parts are coupled via a damper unit so as to be movable in opposite directions.

[0007]

The damping structure of the present invention reduces the vibration of the building due to an earthquake or wind over a wide range from small amplitude to large amplitude by the damper unit incorporated in the brace frame supporting the horizontal load of the building. Let When the damper unit is actively controlled, it is possible to further enhance the vibration damping effect when the amplitude is small.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an embodiment of a building by a megastructure construction method provided with a vibration damping structure of the present invention, in which FIG. 1A is constructed on the inner frame 1 and FIG. An outer peripheral side brace frame 2 and FIG. 1C respectively show an inner peripheral side brace frame 3 constructed on the inner peripheral side of the inner frame 1.

The crossing portion of the tension member 4a and the compression member 4b of the brace 4 which constitutes the outer peripheral side brace frame 2 is connected through the damper unit 10 and the tension member 5a of the brace 5 which constitutes the inner peripheral side brace frame 3. Similarly, the crossing portion between the compression member 5b and the compression member 5b is also connected via the damper unit 10, and the brace frames 2 and 3 are pin-joined 6 for each specific layer.

The outer peripheral brace frame 2 and the inner peripheral brace frame 3 of this building bear a horizontal load, and the inner frame 1
Supports a vertical load and bears a part of the horizontal load. The damper unit 10 incorporated in the outer and inner brace frames 2 and 3 reduces horizontal vibration. is there. Damper unit 10
For example, a friction damper, a rotary damper or the like can be used.

FIG. 2 shows a brace frame using a friction damper 10a, which is a brace 4a composed of two members in one direction.
The shaft end of 5a and the shaft ends of the braces 4b and 5b composed of two members in the direction intersecting the shaft 5a are respectively provided with the friction material 11
Are sandwiched and overlapped, and a low friction material 12 such as a bearing material or a Teflon material is interposed between the shaft ends of the one brace 4a and 5a and the shaft ends of the other brace 4b and 5b to bring them into a close contact state. Coil springs 13 are inserted on both side surfaces of the product, and a crimping plate 14 is tightened with bolts 15 with a predetermined force. An oil pressure unit 16 is provided around each friction material 11, and by changing the hydraulic pressure, the tightening force of the friction material 11 is adjusted to adjust the friction force to an appropriate strength. This allows brace 4a (5
The shaft ends of a) or 4b (5b) can move in mutually opposite directions under the frictional force.

The friction damper 10a can apply a damping force to a wide range of amplitude to the building by reducing the frictional force when the amplitude is small and increasing the frictional force when the amplitude is large according to the amplitude generated in the building. it can. Note that, instead of tightening the friction material 11 via the coil spring 13, it is possible to adjust the tightening force using a hydraulic unit, but in such a case, it is necessary to constantly apply hydraulic pressure.

FIG. 3 shows a brace frame using a rotary damper 10b. The shaft ends of the braces 4a and 5a consisting of two members in one direction and the shafts of the braces 4b and 5b consisting of two members in a direction intersecting with the shaft ends. The end portions are rotatably attached to the outer peripheral edge of the turntable 17, and the shaft body 17a of the turntable 17 is connected to the speed reducer 19 driven by the AC servomotor 18 installed on the floor 6. There is. The AC servo motor 18 is selected to have a low speed and a large torque. This rotary damper 10b converts the movement of each axial end portion of the brace 4a (5a) in the same direction in the opposite direction into a rotational component around the axis of the rotary disc 17, so that the rotary disc 17 is rotated when the amplitude is small. The torque of the AC servo motor 18 is transmitted through the damping device 19 to control the vibration, and when the amplitude is large, the AC servo motor 18 operates as the damping device to provide the damping force.

The present invention is not limited to being applied to both the outer and inner brace frames of a megastructure building, but may be applied to only one of the brace frames. When controlling the displacement, it is preferable to incorporate a damper unit in the outer peripheral side brace frame, and when controlling a large horizontal displacement, incorporate the damper unit in the inner peripheral side brace frame.

[0015]

As described above, according to the present invention, it is possible to reduce the horizontal vibration of a building due to an earthquake or wind over a wide range from a small amplitude to a large amplitude. Not only can the safety and seismic safety be improved, the horizontal load of the building can be supported by the outer and inner brace frames, and the internal frame can support only the vertical load. In this case, the design cross-section of columns and beams will be small, and it will be possible to secure a large space that can be effectively used, which is extremely advantageous for high-rise and super-high-rise buildings by the megastructure construction method. Obtained.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a front view a showing a brace frame using a friction damper, a sectional view taken along the line AA of FIG. A, and a sectional view taken along the line BB of FIG.
Is.

FIG. 3 is a front view a and a side view b showing a brace frame using a rotary damper.

[Explanation of symbols]

 2 Outer brace frame 3 Inner brace frame 4, 5 Brace 10 Damper unit

Claims (3)

[Claims] 1. A shaft end of each brace in the same direction at an intersection of braces of at least one of the outer and inner perimeter sides of a building according to the megastructure construction is moved in opposite directions via a damper unit. Megastructure brace frame vibration control structure that is freely connected. 2. The vibration damping structure according to claim 1, wherein a friction damper is incorporated as the damper unit. 3. The vibration damping structure according to claim 1, wherein a rotary damper is incorporated as the damper unit.