JPH0658017A - Structure with vibration isolation - Google Patents

Abstract

PURPOSE:To exert a vibration isolating effect in all directions on each horizontal plane of a structure concerned by configuring the structure from a central framing and a peripherframing surrounding it, and furnishing damping devices which couple the upper sides of these framings with each other. CONSTITUTION:When tremors in horizontal direction are generated in a structure 15 owing to an earthquake, etc., the central framing 17 and peripheral framing 19 vibrate with different periods inherent in their respective shapes. Accordingly a horizontal direction relative displacement is generated between the two framings 17, 19, and a damping device 21 is actuated to exert the vibration isolating effect. A pair of such damping devices 21 are installed at each of the four corners of the central framing 17 in such an arrangement as perpendicularly intersecting the horizontal lane and coupled with the two framings 17, 19 through pin joints 23 of universal type, which enables suppressing the tremors in any direction as long as it lies in the horizontal plane. In the case the structure 15 is of sky-scraper type, a flexural deformation is generated as a whole. and even though this flexural deformation generates a relative displacement in vertical direction between the two framings 17, 19, two pin joints 3, 35 fold to prevent flexural deformation of the floor 31.

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 capable of suppressing vibrations in all directions on a horizontal plane during an earthquake or the like.

[0002]

2. Description of the Related Art There are various techniques for controlling the vibration of structures such as buildings. For example, the one shown in FIG.
A brace 5 in which a damping device 3 is incorporated is provided in a part of a frame 1 of a building (Japanese Patent Laid-Open No. 62-148775, etc.). However, according to this technique, the shear deformation (the chain line on the left in the drawing) has a great effect, but the bending deformation (the chain line on the right in the drawing) has a small effect. Therefore, it is not very effective for super high-rise buildings where bending deformation is dominant as the form of shaking.

Further, as shown in FIGS. 4 and 5, by connecting the upper parts of the two buildings 7 and 9 with a damping device, the upper part of the building is displaced regardless of shear deformation or bending deformation. There are technologies that can have a great effect on shaking.

Of these, the one shown in FIG. 4 is one in which the uppermost floors of two completely independent buildings 7 and 9 are connected to each other by a passage 11 and a damping device is provided in this passage 11 portion.
On the other hand, the one shown in FIG. 5 looks like one large building from the outside, but in reality, two separated buildings 7 and 9 are connected to each other by a roof garden 13 on the upper side, and this roof garden 13 is a part. Is equipped with a damping device.

[0005]

However, what is shown in FIGS. 4 and 5 is to connect two buildings which are built adjacent to each other in parallel by a damping device, and the vibration is suppressed only in a single direction of the horizontal plane. Unable to act. That is, the damping effect can be obtained only in the direction in which the two buildings are connected. The present invention has been made in view of such circumstances, and an object thereof is to provide a vibration damping structure that can obtain a vibration damping action in all directions of a horizontal plane.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 comprises a structure comprising a central frame and an outer frame surrounding the central frame, and the central frame and the outer frame. A damping device is provided on the upper side of and for damping the relative vibration by connecting them to each other.

Further, in addition to the structure of claim 1, the invention according to claim 2 is such that the floor of each floor of the outer frame is supported by the outer frame so as to be slidable in the horizontal direction, and the outer frame is also supported. The floors are connected to each other on the same floor of the central frame through pin joints that absorb bending deformation.

[0008]

In the invention according to claim 1, since the outer peripheral frame is present in all horizontal directions surrounding the periphery of the central frame,
By arranging a plurality of damping devices that connect the upper portions of the central frame and the outer frame to each other in appropriate directions, it is possible to obtain a vibration damping action against shaking in all directions of the horizontal plane.

In the invention according to claim 2, in the joined floors of each floor, even if relative displacement occurs between the central frame and the outer frame,
The horizontal displacement is absorbed by the slide means, and the bending deformation due to the vertical displacement is absorbed by the pin joint.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. The structure 15 that looks like one as a whole from the outside is composed of two structurally independent frames 1
It is composed of 7 and 19. One is a central frame 17 which constitutes the center of the structure 15, and the other is an outer frame 19 which surrounds the periphery of the central frame 17 and constitutes the outer periphery of the structure 15. The central frame 17 has a generally rectangular horizontal cross section as a whole, and the outer frame 19 has a generally rectangular ring-shaped horizontal cross section as a whole.

A damping device 21 is provided at an upper portion, that is, a top portion of the two frames 17 and 19 to connect the two frames 17 and 19. In the present embodiment, the damping device 21 is arranged in a substantially horizontal direction and has a universal type pin joint 2
2, the damping device 21 is provided at each of four corners of the central frame 17 in a direction orthogonal to each other at a total of eight places, as shown in FIG. Vibration can be controlled against shaking in any direction.

The roof portion of the structure 15 has a double structure, and the roof 27 of the central frame 17 is two-dimensionally horizontal with respect to the ring-shaped roof 25 of the outer frame 19 via, for example, a trolley with casters. It is slidably covered. In addition, a waterproof structure is provided in a flexible form at a joint portion between the roofs 25 and 27.

On each floor, the floor of the outer frame 19 is 2 above and below.
The lower floor 29 is fixed to the outer peripheral frame 19. The upper floor 31 is supported on the lower floor 29 via sliding means 32, for example, a trolley with casters, and is slidable in two dimensions with respect to the lower floor 29. The upper floor 31 is the central frame 19
Floor 3 of the central frame 17 on the same floor that extends horizontally toward
4 and the floor 31 above this is the central frame 1
It is attached to the 7 side via a pin joint 33, and a pin joint 35 is also provided in a portion between the central frame 17 and the outer frame 19. That is, even if a relative displacement in the vertical direction occurs on the side of the central frame 17 and the side of the outer frame 19 due to an earthquake or the like, for example, the floor 31 will not move to the pin joint 3 side.
The bending stress is absorbed by bending at the portions 3, 35.

The operation of this embodiment will be described below. When the structure 15 is shaken in the horizontal direction due to an earthquake or the like, the central frame 17 and the outer frame 19 have different shapes.
Each has a unique vibration cycle. Therefore, a relative displacement in the horizontal direction occurs between the two frames 17 and 19, and the damping device 21 acts on this displacement to perform a vibration damping action. On this occasion,
As described above, the damping devices 21 are provided in pairs at the four corners of the central frame 17 along the direction orthogonal to the horizontal plane, and are connected to both frames 17 and 19 via universal type pin joints 23. Therefore (FIG. 2), the shake can be suppressed in any direction as long as it is horizontal.

In addition, when the structure 15 is a super high-rise building, bending deformation occurs as a whole. Even if a relative displacement in the up-down direction occurs between the frames 17 and 19 due to the bending deformation, each floor This displacement can be absorbed by the two pin joints 33 and 35 provided on the floor 31 of the. That is, by bending the two pin joints 3 and 35, the floor 31
Therefore, it is possible to prevent the bending deformation.

As described above, according to this embodiment, it is possible to suppress vibrations in any horizontal direction. Further, by connecting the floors of the two frames 17 and 19 on the same floor by using the slide means 32 and the pin joints 33 and 35, the continuous single unit can be absorbed in a state in which horizontal displacement and bending deformation can be absorbed. It can be formed as a floor surface, and thus the space portion 10 between the two buildings 7 and 9 that has been wasted conventionally (see FIG. 5) can be partitioned for each floor, and the floor area can be expanded and used effectively. it can.

In the above embodiment, the central frame 1
Although both 7 and the outer frame 19 have been described as having a rectangular horizontal cross section, they need not be rectangular in other embodiments. That is, since the outer frame 19 may be positioned so as to surround the central frame 17, the shapes of the horizontal cross sections of both frames 17, 19 are not particularly limited. For example, the shape may be a circle, a triangle, a pentagon or more polygon, or a more complicated shape.

[0018]

As described above in detail in the embodiments,
According to the vibration damping structure of the first aspect of the present invention, the outer peripheral frame exists around the central frame, and the upper portions of the central frame and the outer frame are connected to each other by the damping device.
It is possible to suppress the shaking in all directions on the horizontal plane.

Further, according to the vibration damping structure of the second aspect of the present invention, the floors of the respective floors of the central frame and the outer frame are further joined by including the slide means and the pin joint.
In the state where horizontal displacement and bending deformation can be absorbed, it can be formed as a single continuous floor surface, and can be used as a floor portion without wasting the space between the central frame and the outer frame.

[Brief description of drawings]

FIG. 1 is a schematic overall cross-sectional view of a vibration damping structure according to an embodiment of the present invention.

FIG. 2 is a horizontal sectional view of a main part of FIG.

FIG. 3 is a schematic overall vertical sectional view showing a first conventional example.

FIG. 4 is a schematic overall perspective view showing a second conventional example.

FIG. 5 is a schematic overall vertical sectional view showing a third conventional example.

[Explanation of symbols]

 17 Central Frame 19 Peripheral Frame 21 Damper 25, 27 Roof 29 Lower Floor 31 Upper Floor 32 Slide Part 22, 25 Pin Joint

Claims (2)

[Claims] 1. A damping structure, comprising a central frame and an outer frame surrounding the central frame, and connecting the upper part of the central frame and the outer frame to each other to attenuate the relative vibration. A vibration control structure characterized by having a device. 2. A damping structure for constructing a structure comprising a central frame and an outer frame surrounding the central frame, the upper frame of the central frame and the outer frame being connected to each other to dampen the relative vibration. A pin joint that is provided with a device, supports the floors of each floor of the outer frame so as to be slidable in the horizontal direction, and absorbs bending deformation of the floor of the outer frame to the floor of the same floor of the central frame. A vibration-damping structure characterized by being connected to each other via a.