JPH0586745A - Plastic damper - Google Patents

Abstract

PURPOSE:To facilitate the change of rigidity by drilling a plurality of energy absorbing body engagement grooves on a bass plate which is installed in op posed state and installing a plate shaped energy absorbing body in the engage ment groove, so as to connect the base plate. CONSTITUTION:A wall 5 made of precast concrete is installed in a space surrounded by the contiguous pillars 2 and 2 and the contiguous beams 3 and 3, and each cut part 5a for installing a damper is formed on the upper and lower sides, and viscoelastic dampers 6 and 6 are arranged in the upper cut parts 5a and 5a and plastic dampers 7a and 7a are arranged in the lower cut parts 5a and 5a. Then, on the damper 7, base plates 15 and 15, energy absorbing body engagement groove 15a, and an energy absorbing body 16 are installed. Then, vibration is generated in the directions of arrows A and B, and during the time when the vibration is little, the vibration energy is absorbed by the damper 6, and when the vibration increases, the energy is absorbed by the plastic deformation of the absorbing body 16. Then, the rigidity of the damper 7 is adjusted freely by changing the plate width W of the absorbing body or combining a variety of absorbing bodies 16 having a variety of plate width W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elasto-plastic damper which can be incorporated between a wall of a structure and a beam to exhibit a vibration damping effect.

2. Description of the Related Art Recently, various types of vibration damping devices have been proposed in order to suppress the shaking generated in a structure due to an earthquake, wind, or the like, but many of them have been incorporated in the foundation of the structure. However, in addition to such a method, if there is a vibration damping device capable of absorbing vibration in each layer of the structure, even if the vibration damping performance of each individual device is relatively small, it can effectively work. Development was desired.
Therefore, the walls and columns of each floor are formed with a gap, and the walls are connected to the beams through viscoelastic members and elastic-plastic members,
A frame-incorporated type vibration damping device has been proposed in which a viscoelastic damper absorbs a shake caused by an earthquake while the shake is small and an elastic-plastic damper absorbs the shake when the shake is large.

Conventionally, as an elasto-plastic damper, one in which a slit is formed in a metal plate is known, but it is difficult to adjust the rigidity suitable for a building with such a damper, and it is difficult to adjust the rigidity on site. It was necessary to prepare various kinds of dampers suitable for. SUMMARY OF THE INVENTION It is an object of the present invention to provide an elasto-plastic damper whose rigidity can be easily changed in order to solve the above-mentioned drawbacks.

[0002]

That is, according to the present invention, the base plates (15) are provided so as to face each other, and a plurality of energy absorber engagement grooves (15a) are respectively formed in the base plates to form the energy absorbers. A plurality of plate-shaped energy absorbers (16) are provided in the body engaging groove so as to connect the base plates. Further, the present invention is configured such that the plurality of energy absorbers have at least two kinds of plate widths. Further, the present invention is configured such that the plurality of energy absorbers have at least two kinds of materials.

With the above-described structure, the present invention acts to adjust the rigidity of the damper by inserting and removing the energy absorber (16) through the energy absorber engagement groove (15a). Further, according to the present invention, the energy absorbers having different plate widths and different materials are combined and attached, and thus, the function of finely adjusting the rigidity is achieved.

[0003]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a view showing an embodiment of a frame-incorporated type vibration damping device, FIG. 2 is a side view showing an example of a viscoelastic damper, FIG. 3 is a front view showing an example of an elasto-plastic damper according to the present invention, and FIG. FIG. 4 is a side view of FIG. 3.

As shown in FIG. 1, the structure 1 has columns 2 standing upright at predetermined intervals, and a beam 3 is formed between the columns 2 so that the columns 2 are connected to each other. Is installed horizontally.
A wall 5 made of precast concrete is provided in a space surrounded by columns 2 and 2 adjacent to each other in the horizontal direction and beams 3 and 3 adjacent to each other in the vertical direction. Four notches 5a for mounting the damper are formed.
Among the notches 5a, viscoelastic dampers 6, 6 are provided between the notches 5a, 5a on the upper side in the drawing and the beam 3 on the upper side in the drawing, and the notches 5a, 5a on the lower side in the drawing. Elasto-plastic dampers 7, 7 are provided between the lower beam 3 and the beam 3. In addition,
A portion of the wall 5 other than the portion supported by the viscoelastic damper 6 and the elasto-plastic damper 7 has a gap 9 between the pillar 2 and the beam 3 in the surroundings.
Are formed.

The elasto-plastic damper 7 has base plates 15, 15 as shown in FIGS. 3 and 4.
The upper side of each base plate 15 in the figure is attached to the wall 5 side, and the lower side in the figure is attached to the beam 3 side. Each base plate 15,
As shown in FIG. 3, energy absorber engaging grooves 15a are formed in the base plate 15 so as to face each other, and the base plates 15 and 15 are made of metal having a different plate width W. A plurality of energy absorbers 16 are provided in such a manner that both ends of the energy absorbers 16 are fitted into and engaged with the respective engagement grooves. on the other hand,
As shown in FIG. 2, the viscoelastic damper 6 is a mounting member 1 having an L-shaped cross section, which is fixed to the wall 5 side via a base plate 8.
0 and 10 are provided in such a manner that the member mounting surfaces 10a and 10a are opposed to each other and extend in a direction perpendicular to the plane of the drawing, and a mounting member 11 having a T-shaped cross section is provided between the member mounting surfaces 10a and 10a. The member mounting surfaces 11a and 11a are attached to each mounting member 1
It is provided so as to face the member mounting surface 10a of 0 and extend in the direction perpendicular to the paper surface in the drawing. The upper part of the mounting member 11 in the drawing is fixed to the beam 3 via a base plate 13, and a viscoelastic member 12 made of a viscoelastic material is provided between the member mounting surfaces 10a and 11a in the direction perpendicular to the paper surface of the drawing, that is, 1
The mounting surfaces 10a and 11a are connected in the directions of arrows A and B in the figure.

Since the structure 1 and the like have the above-mentioned structure, when the structure 1 is vibrated in the directions of arrows A and B in FIG. Relative vibration occurs in the directions of the arrows A and B between the two, but while the vibration is small, the vibration is provided between the beam 3 and the wall 5 on the upper side in the drawing,
The viscoelastic member 12 between the mounting members 10 and 11 of the viscoelastic damper 6 shown in FIG. 2 deforms to absorb the vibration energy.
Further, when the vibration in the directions of arrows A and B becomes large and the viscoelastic member 12 of the viscoelastic damper 6 cannot absorb the vibration alone, the beam 3 and the wall 5 at the bottom of FIG.
Energy absorber 1 of elasto-plastic damper 7 provided between and
6 plastically deforms in the directions of arrows A and B in FIG. 3 to absorb the energy. Even in this case, the viscoelastic damper 6
The operation of absorbing the vibration energy due to is continued. At this time, the rigidity of the elasto-plastic damper 7 is
The energy absorber 16 having a plurality of plate widths W is changed by changing the plate width W of the energy absorber 16 mounted between the two.
Since it is possible to freely adjust and change them by combining and mounting them on site, it is possible to give the damper 7 the rigidity most suitable for the mode of the building. Further, the once installed energy absorber 16 can be removed from the engagement groove 15a by inserting / removing in the directions of arrows C and D in FIG. 4 (note that the energy absorber 16 is normally installed).
It is desirable to fix one of the ends to the base plate 15 with bolts or welding),
The absorber 16 once plastically deformed and deteriorated can be easily replaced without removing the entire elasto-plastic damper 7. Furthermore, even when the damper is installed or after installation,
The rigidity of the damper 7 can be easily adjusted by appropriately changing the number of the energy absorbers 16 to be mounted between the base plates 15 and 15. Furthermore, by appropriately changing the material of the energy absorber 16 and configuring the absorber 16 to be mounted from a plurality of types of materials, it is possible to utilize the difference in rigidity based on the difference in material, and to use the plate width and the material. It is possible to finely adjust the rigidity from both sides.

[0007]

As described above, according to the present invention,
Base plates 15 and 15 are provided so as to face each other, and a plurality of energy absorber engagement grooves 15a are formed in the base plates, respectively, and a plurality of plate-shaped energy absorbers 16 are provided in the energy absorber engagement grooves. Since the base plate is provided so as to be connected, the energy absorber 1
By inserting and removing 6b through the energy absorber engagement groove 15a, the rigidity of the damper can be easily adjusted. That is, the rigidity of the damper can be easily adjusted by adjusting the number of energy absorbers to be attached. Further, when the plurality of energy absorbers are configured to have at least two types of plate widths W, the energy absorbers having different plate widths are combined and mounted, and thus the finer rigidity adjustment can be performed. Similarly, when the plurality of energy absorbers are configured to have at least two kinds of materials, the material of the energy absorber 16 is changed as appropriate,
By configuring the absorber 16 to be mounted with a plurality of types of materials, it is possible to finely adjust the rigidity by utilizing the difference in rigidity based on the difference in material.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a frame-incorporated vibration damping device,

FIG. 2 is a side view showing an example of a viscoelastic damper,

FIG. 3 is a front view showing an example of an elasto-plastic damper according to the present invention,

FIG. 4 is a side view of FIG.

[Explanation of symbols]

 7 ... Elasto-plastic damper 15 ... Base plate 15a ... Energy engagement groove 16 ... Energy absorber

Claims (3)

[Claims] 1. A plurality of energy absorbing body engaging grooves are formed in the base plates so as to face each other, and a plurality of plate-like energy absorbing bodies are formed in the energy absorbing body engaging grooves. An elasto-plastic damper formed by connecting base plates. 2. The elasto-plastic damper according to claim 1, wherein the plurality of energy absorbers have at least two kinds of plate widths. 3. The elasto-plastic damper according to claim 1, wherein the plurality of energy absorbers have at least two kinds of materials.