JPH0510659U - Vibration energy absorber attached to building frame - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Due to the mutual displacement of the casing and the resistance plate housed in the casing with a minute gap, which is installed in the partitioned space of columns and beams of the building frame. In a device that absorbs vibration energy with viscous resistance due to a viscous material interposed in a minute gap, it is possible to cope with out-of-plane displacement of interlayer displacement of a partitioned space and absorb vibration energy well. A resistance plate 6 is provided with an elastically deformable portion, and the elastically deformable portion is provided with flexibility corresponding to a displacement component in the maximum out-of-plane direction of interlayer displacement of a building framework.

Description

[Detailed description of the device]

B. Purpose of the Invention (1) Field of Industrial Application This invention relates to a vibration energy absorbing device that absorbs vibration energy input into a structure such as earthquake motion and attenuates the vibration of the structure.・ It relates to a vibration energy absorbing device attached to a building frame composed of beams.

(2) Conventional Technology A building structure composed of columns and beams is suitable as a flexible structure for a middle- and high-rise base-isolated building structure, but because of its outstanding damping of lateral vibration, Dampers have been developed and are in actual use. An example of such a damping device is a vibration energy absorbing device disclosed in Japanese Examined Patent Publication No. 54-28226.

That is, the prior art is directed to a vibration energy absorbing device in which one resistance plate, the other resistance plate, and an energy absorbing material made of a highly viscous substance are filled in the gap between the resistance plates. One 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 due to an earthquake, etc. The plate is relatively displaced, the viscous shear resistance is generated in the highly viscous substance by the relative displacement, and the vibration energy is absorbed by the viscous shear resistance.

However, relative displacement between layers of a building frame, so-called interlayer displacement, is not limited to purely horizontal displacement, and depending on the structure of the building, some torsional displacement or vertical direction with respect to the plane of the frame may occur. Although the displacement in the out-of-plane direction such as the above-mentioned displacement is also added, the conventional technology has a structure in which the resistance plates are in rigid contact with each other to forcibly suppress the displacement in the out-of-plane direction. Therefore, when a large out-of-plane displacement acts, not only the resistance plate but also each member constituting the energy absorbing device may be damaged, and the energy absorbing function may not be exerted. In addition, if the rigidity of each member of the absorber is increased to prevent damage, each member, and thus the entire building, will be rigidly formed to maintain rigidity, and the building structure becomes a rigid structure, which is not preferable as a seismic isolated building structure. Not only will it be expensive to build.

(3) Problems to be Solved by the Invention The present invention has been made in view of the above circumstances, and in a vibration energy absorbing device attached to this kind of building frame structure, the torsional displacement and the surface of the frame structure are It is an object of the present invention to provide a novel vibration energy absorbing device that can absorb vibration energy satisfactorily even in an architectural frame structure in which an out-of-plane displacement such as a vertical displacement acts on the structure.

B. Configuration of the Invention (1) Means for Solving Problems The vibration energy absorbing device attached to the building frame of the present invention has the following configuration in order to achieve the above object. That is, the building frame structure is composed of the column members arranged side by side and the beam members fixed in layers between the column members, and is divided into the column members arranged side by side and the upper and lower beam members. In a vibration energy absorption device installed in a partitioned space, a resistance plate attached to the upper beam member side and arranged along the plane of the partitioned space, and consisting of a lower resistance part and an upper elastic deformation part. And; Relative movement along the plane of the compartment space via a spacer that is attached to the lower beam member side and is also arranged along the plane of the compartment space and holds a minute gap with respect to the lower part of the resistance plate. A casing for accommodating a lower resistance portion of the resistance plate as possible; an energy absorbing material made of a highly viscous substance filled in a minute gap between the resistance plate and the casing; The elastic deformation part is the building frame Flexibility is granted sufficient to permit the maximum out-of-plane direction displacement component layers displacement, characterized in that.

(2) Action When a forced vibrational force such as a seismic motion acts on a building structure such as a building, the building causes a swaying motion according to its natural vibration, and an interlayer displacement occurs between the upper and lower beam members of the building frame. Occurs. Of these inter-layer displacements, the displacement in the plane direction of the compartment space of the skeleton is the relative displacement between the resistance plate and the casing, and is caused by the viscous shear resistance of the highly viscous substance placed in the minute gap between the resistance plate and the casing. Absorbed promptly. Further, the displacement in the out-of-plane direction of the partitioned space of the skeleton is allowed by the elastic deformation of the elastically deformable portion of the resistance plate mounted between the vibration energy absorber and the skeleton, and there is no risk of the mounting portion being damaged.

(3) Embodiment An embodiment of the vibration energy absorbing device attached to the 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 structure including the vibration energy absorbing device S, and FIG. 2 shows its cross-sectional structure.

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

This vibration energy absorbing device S is attached to the lower beam member 2B and has a casing 4 opened upward; an energy absorbing material 5 made of a highly viscous substance filled in the casing 4; an upper beam. A resistance plate 6 attached to the 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.

The detailed configuration of each unit will be described below. The casing 4 forms a rectangular parallelepiped container body, and is fixedly attached 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 is provided with a rectangular bottom plate 4A, two side walls 4B that are opposed to each other at a predetermined interval and that stand up from the long side of the bottom plate 4A, and two pairs of the same two that stand up from the short side. It is composed of a side wall 4C, and 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 highly viscous substance such as polyolefin or polysiloxane is used.

The resistance plate 6 is fixedly attached to the upper beam member 2 A via a mounting plate 10 by a fixing means such as a bolt and a nut (not shown). The present embodiment is characterized by the structure of the resistance plate 6 and its arrangement mode. That is, the resistance plate 6 is made of a rectangular flat plate, exhibits flexibility with respect to a force orthogonal to the plate surface, and exhibits rigidity with respect to a force along the plate surface. The lower portion of the resistance plate 6 is constrained from moving in the out-of-plane direction inside the casing 4, and is inserted so as to be relatively movable in the in-plane direction with respect to the casing 4. Thus, the resistance plate 6 is divided into a lower portion, which is the resistance portion 6A, which is inserted into the casing 4, and a remaining portion, which is the elastic deformation portion 6B.

More specifically, the resistance portion 6A of the resistance plate 6 maintains a minute space s between the resistance portion 6A and the side wall 4B on the long side of the casing 4, and the side wall 4C on the short side prevents occurrence of earthquake motion or the like. It is arranged in the casing 4 with the moving range L corresponding to the maximum displacement. Spacers 7 are fixed on both surfaces of the resistance portion 6A of the resistance plate 6 in a plurality of stages in the vertical direction by a fixing means such as an adhesive, and the spacers 7 maintain a minute gap s with the side wall 4B of the casing 4. The energy absorbing material 5 is always present in the minute space s. The elastically deformable portion 6B of the resistance plate 6 is free from the restraint of the side surface portion as in the resistance portion 6A at that portion, and the characteristics of the resistance plate 6 are exerted as they are, so that the force in the out-of-plane direction of the frame body is exerted. In contrast, it exhibits flexibility. The flexibility of the elastically deformable portion 6B is determined in consideration of the maximum value of the displacement component in the out-of-plane direction displacement between layers in each of the partitioned spaces K of the building frame structure. It is rationally determined by the rigidity. 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 acting, the thickness of the resistance plate, etc., but the length in the vertical direction is 1: 1. It is preferable that the ratio is set to 2: 1.

The vibration energy absorbing device S of this embodiment configured as described above 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, which causes relative displacement between the upper and lower beam members 2A and 2B constituting the building frame structure, that is, an interlayer. Displacement occurs. This inter-layer displacement occurs three-dimensionally, but the horizontal displacement is predominant, and the torsional displacement of the surface of the partitioned space K is also included. The vertical displacement is negligible. Then, the interlayer displacement between the upper and lower beam members 2A and 2B becomes the relative displacement between the resistance plate 6 and the casing 4, and the twist component of the relative displacement, that is, the displacement component in the out-of-plane direction of the skeleton is the resistance component. It is absorbed by the elastic deformation of the elastic deformation portion 6B at the upper portion of the plate 6, and no twist component is transmitted to the resistance portion 6A at the lower portion of the resistance plate 6. Therefore, in the resistance portion 6A of the resistance plate 6, only the displacement along the plate surface is transmitted, and due to the viscous shear resistance of the energy absorbing material 5 interposed in the minute gap s between the resistance portion 6A of the resistance plate 6 and the casing 4. , This displacement is quickly dampened. As described above, according to this embodiment, since the twist component of the interlayer displacement is allowed by the elastic deformation of the resistance plate 6, it is not necessary to suppress the twist component by the rigidity of the resistance plate 6 and the casing 4, and The plate 6 and the casing 4 can be made as thin 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 designated by the same reference numerals. In this embodiment, the resistance plate 6 is not a single flat plate but a composite body in which the resistance member 12 and the elastic deformation member 13 are connected.

Since the elastic deformation member 13 bears only elastic deformation, it can be formed as thin as possible, and the resistance portion member 12 can be made thick to increase rigidity. In addition, the function can be specialized compared to a single resistance plate, and a rational design can be achieved.

C. Effect of the Invention According to the vibration energy absorbing device attached to the building frame of the present invention, the displacement component of the interlayer displacement in the out-of-plane direction 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 by the vibration energy absorbing device and thus the rigidity of the building structure, and it is possible to effectively absorb the vibration energy as a base-isolated building structure.

[Brief description of drawings]

FIG. 1 is a partially sectional front view of an 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.

4 is a sectional view taken along line IV-IV in FIG.

[Explanation of symbols]

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

Claims (1)

[Claims for utility model registration] [Claim 1] A building frame structure is composed of pillar members arranged side by side and beam members fixed in layers between the pillar members,
In a vibration energy absorbing device installed in a partitioned space partitioned from a column member and upper and lower beam members aligned with each other, the vibration energy absorbing device is attached to the upper beam member side, is arranged along a plane of the partitioned space, and has a lower resistance portion. And a resistance plate composed of an upper elastically deforming portion; mounted on the lower beam member side, also arranged along the plane of the partition space, via a spacer for holding a minute gap to the lower part of the resistance plate. A casing for accommodating a resistance portion below the resistance plate so as to be relatively movable along a plane of the partitioned space; an energy absorbing material made of a highly viscous substance filled in a minute gap between the resistance plate and the casing; The elastic deformation part on the upper part of the resistance plate is provided with flexibility sufficient to allow the maximum out-of-plane displacement component of the interlayer displacement of the building frame structure. Absorbing device.