JP2544347Y2 - Vibration energy absorber attached to building frame - Google Patents

Description

[Detailed description of the invention]

A. Purpose of the invention (1) Industrial application field This invention relates to a vibration energy absorbing device that absorbs vibration energy input into a structure such as an earthquake motion and attenuates the vibration of the structure. The present invention relates to a vibration energy absorbing device attached to a building frame composed of beams.

(2) Conventional technology Building structures composed of columns and beams are suitable as flexible structures as middle-rise and high-rise seismic isolation building structures. Damping devices have been developed and are actually installed. An example of such a damping device is a vibration energy absorbing device disclosed in Japanese Patent Publication No. 54-28226.

[0003] That is, the prior art is one of a vibration energy absorbing device in which an energy absorbing material made of a highly viscous substance is filled and interposed between a resistor plate, the other resistor plate, and a gap between the resistor plates. A resistance plate is fixed to the upper beam member side of the building frame, and the other resistance plate is fixed to the lower beam member side,
When horizontal displacement occurs in the plane direction of the frame body due to an earthquake or the like, both resistance plates are displaced relative to each other, and the relative displacement causes viscous shear resistance in the highly viscous material, which absorbs vibration energy. is there.

However, the relative displacement between layers of the building frame, that is, the so-called interlayer displacement, is not limited to a purely horizontal displacement. Depending on the structure of the building, a slight torsional displacement or a vertical displacement with respect to the surface of the frame is required. Although the displacement in the out-of-plane direction is also applied, the prior art has a structure in which the resistance plates are in rigid contact with each other, and the displacement in the out-of-plane direction is forcibly suppressed. Therefore, when a large out-of-plane displacement acts, not only the resistance plate but also the members constituting the energy absorbing device may be damaged, and the energy absorbing function may not be able to be exhibited. In addition, when the rigidity of each member of the absorbing device is increased to prevent damage, each member and thus the entire building is formed firmly to maintain rigidity, and the building structure becomes a rigid structure, which is not preferable as a seismically isolated building structure. Not only will construction costs be high.

(3) Problems to be solved by the present invention The present invention has been made in view of the above-mentioned circumstances, and in a vibration energy absorbing device to be attached to this kind of building frame structure, there is a problem with torsional displacement or surface of the frame body. An object of the present invention is to provide a novel vibration energy absorbing device capable of favorably absorbing vibration energy even in an architectural frame structure in which an out-of-plane displacement such as a vertical displacement acts.

B. Structure of the Invention (1) Means for Solving the Problems The vibration energy absorbing device attached to the building frame of the invention adopts the following structure in order to achieve the above object.
That is, the building frame is constituted by the column members arranged side by side and the beam members fixedly arranged in layers between the column members, and is a partitioned space defined by the column members arranged side by side and the upper and lower beam members. A resistance plate attached to the upper beam member side and arranged along the plane of the partition space and comprising a lower resistance portion and an upper elastic deformation portion; a lower beam member Mounted on the side, also arranged along the plane of the partitioned space, and relatively movable along the plane of the partitioned space via a spacer that holds a small gap with respect to the lower part of the resistor plate. A casing for accommodating a lower resistance portion; and an energy absorbing material made of a highly viscous substance filled in a minute gap between the resistance plate and the casing; and an upper elastic deformation portion of the resistance plate is a building frame. Body layers Flexibility is granted sufficient to permit the maximum out-of-plane direction displacement component of the displacement, characterized in that.

(2) Action When a forced vibration force such as an earthquake motion acts on a building structure such as a building, the building shakes in accordance with its natural vibration, and interlayer displacement occurs between the upper and lower beam members of the building frame. . Among the interlayer displacements, the displacement in the surface direction of the division space of the frame body is a relative displacement between the resistance plate and the casing, and is caused by the viscous shear resistance of the high-viscosity substance disposed in the minute gap between the resistance plate and the casing. Quickly absorbed. In addition, the displacement in the out-of-plane direction of the partitioned space of the skeleton is allowed by the elastic deformation of the elastic deformation portion of the resistance plate attached between the vibration energy absorbing device and the skeleton, and there is no possibility that the attachment portion is damaged.

(3) Embodiment An embodiment of a vibration energy absorbing device attached to a building frame of the present invention will be described with reference to the drawings. (First Embodiment) FIGS. 1 and 2 show one embodiment (first embodiment). That is, FIG. 1 shows the entire front configuration including the vibration energy absorbing device S, and FIG. 2 shows the cross-sectional configuration.

In the figures, reference numerals 1 and 2 denote column members and beam members constituting a frame of a building structure, 2A denotes an upper beam member, 2A
B is a lower beam member. The adjacent column member 1 and the upper and lower beam members 2 form a partitioned space K. Thus, the vibration energy absorbing device S is installed in the partitioned space K between the upper beam member 2A and the lower beam member 2B.

The vibration energy absorbing device S is mounted on a lower beam member 2B and has a casing 4 opening upward.
And an energy absorbing material 5 made of a highly viscous substance filled in the casing 4; and a resistance plate 6 attached to the upper beam member 2A and having a lower portion inserted into the casing 4; And a spacer 7 interposed between the casing and the resistance plate 6.

Hereinafter, a detailed configuration of each unit will be described. The casing 4 forms a rectangular container, and is fixed to the lower beam member 2B via a mounting base 9 by fixing means such as bolts and nuts (not shown). More specifically, the casing 4 includes a rectangular bottom plate 4A, two side walls 4B opposed at a predetermined interval rising from the long side of the bottom plate 4A, and two opposite side walls 4C rising from the short side. The bottom plate 4A and the side walls 4B and 4C form a box shape that opens upward. The inner surface of the side wall 4B is a smooth surface.

As the energy absorbing material 5 filled in the casing 4, for example, a high-viscosity material such as polyolefin or polysiloxane is used.

The resistance plate 6 is attached to the upper beam member 2A by the mounting plate 1
0 and is fixed and attached by fixing means such as bolts and nuts (not shown). In this embodiment,
The structure of the resistor plate 6 and the arrangement thereof are characterized. That is, the resistance plate 6 is formed of a rectangular flat plate, and exhibits flexibility with respect to a force perpendicular to the plate surface and rigidity with respect to a force along the plate surface. And this resistance plate 6
The lower part is inserted into the casing 4 so as to be restrained from moving in the out-of-plane direction, and is movable relative to the casing 4 in the in-plane direction. Thus, the resistance plate 6 is divided into a lower part inserted into the casing 4, ie, a resistance part 6A, and a remaining part, ie, an elastic deformation part 6B.

More specifically, the resistance portion 6A of the resistance plate 6
The casing 4 has a small distance s between itself and the side wall 4B on the long side of the casing 4 and has a movement area L corresponding to the maximum displacement amount such as an earthquake motion with the side wall 4C on the short side. 4 are arranged. On both sides of the resistance portion 6A of the resistance plate 6, a spacer 7 is fixed by a fixing means such as an adhesive in a plurality of steps in the vertical direction, and the spacer 7 maintains a minute interval s with the side wall 4B of the casing 4; The minute interval s
Always has the energy absorbing material 5 interposed therebetween. Resistance plate 6
The elastically deformable portion 6B is free from the restraint of the side portion as in the resistance portion 6A, and exhibits the characteristics of the resistance plate 6 as it is, and is flexible against the out-of-plane force of the skeleton body. Shows sex. The flexibility of the elastically deformable portion 6B is determined in consideration of the maximum value of the out-of-plane displacement component of the interlayer displacement in each of the compartments K of the building frame, and is determined by the rigidity of the building frame. Determined rationally. The resistance portion 6A and the elastic deformation portion 6B of the resistance plate 6 differ depending on the rigidity of the building frame, the magnitude of the external force to be applied, the thickness of the resistance plate, and the like. It is preferable to configure the ratio of 1: 1.

The vibration energy absorbing device S according to the present embodiment having the above-described structure operates as follows. Now, when a forced vibration force such as an earthquake acts on this building structure, the forced vibration causes a vibration in the building structure, and a relative displacement between the upper and lower beam members 2A and 2B constituting the building frame, that is, an interlayer. Displacement occurs. This interlayer displacement occurs three-dimensionally,
The displacement in the horizontal direction is dominant, and includes the torsional displacement of the surface of the partitioned space K. Note that the vertical displacement is negligible. The upper and lower beam members 2A, 2B
The interlayer displacement between them becomes a relative displacement between the resistance plate 6 and the casing 4, and the torsional component of the relative displacement, that is, the displacement component in the out-of-plane direction of the skeleton body is the elastic deformation portion 6B on the upper portion of the resistance plate 6.
Is absorbed by the elastic deformation of the
No twist component is transmitted to A. Therefore, only the displacement along the plate surface is transmitted at the resistance portion 6A of the resistance plate 6, and
This displacement is rapidly attenuated by viscous shear resistance of the energy absorbing material 5 interposed within the minute space s between the resistance portion 6A of the resistance plate 6 and the casing 4. As described above, according to the present embodiment, the torsional component of the interlayer displacement is allowed by the elastic deformation of the resistance plate 6, so that the resistance plate 6 and the casing 4
It is not necessary to suppress the torsional component with the rigidity of the above, the thickness of the resistance plate 6 and the member of the casing 4 can be reduced as much as possible, and the weight can be reduced.

(Second Embodiment) FIGS. 3 and 4 show another embodiment (second embodiment) of the present invention. In the figure, the same members as those in the first embodiment are denoted by the same reference numerals. In this example,
The resistance plate 6 is not a single flat body, but forms a composite body in which the resistance member 12 and the elastic deformation member 13 are connected.

However, since the elastic deformation member 13 bears only elastic deformation, it can be formed as thin as possible, and the resistance member 12 can be thickened to increase rigidity. Therefore, the function can be specialized as compared with a single resistor plate, and a rational design can be achieved.

C. Effects of the Invention According to the vibration energy absorbing device attached to the building frame of the present invention, the out-of-plane displacement component of the interlayer displacement is allowed by the elastic deformation of the elastic deformation portion of the resistance plate. It is not necessary to suppress the displacement component in the out-of-plane direction with the vibration energy absorbing device and thus the rigidity of the building structure, and the vibration energy can be favorably absorbed as the seismic isolation building structure.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of one embodiment (first embodiment) of a vibration energy absorbing device attached to a building frame of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a front view of another embodiment (second embodiment) of the present invention.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Column member, 2 ... Beam member, 2A ... Upper beam member, 2B ... Lower beam member, 4 ... Casing, 7 ... Resistance plate, S ... Vibration energy absorbing device

Claims (1)

(57) [Scope of request for utility model registration] 1. A building frame is composed of pillar members arranged side by side and beam members fixed in layers between the pillar members.
A vibration energy absorbing device installed in a partitioned space defined by a row of column members and upper and lower beam members, the vibration energy absorbing device being attached to an upper beam member side, disposed along a plane of the partitioned space, and a lower resistance portion And a resistance plate comprising an upper elastic deformation portion; and a spacer attached to the lower beam member side, also arranged along the plane of the partition space, and holding a minute gap with respect to the lower portion of the resistance plate. A casing accommodating the lower resistance portion of the resistance plate so as to be relatively movable along the plane of the partitioned space; an energy absorbing material made of a high-viscosity material filled in a minute gap between the resistance plate and the casing; The elastic deformation portion on the upper part of the resistance plate is provided with sufficient flexibility to allow a maximum out-of-plane displacement component of the interlayer displacement of the building frame, Absorbing device.