JP2516576B2 - Elastic-plastic damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a). BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elasto-plastic damper capable of absorbing seismic energy and minimizing shaking of a structure during an earthquake.

(B). 2. Description of the Related Art Conventionally, as a damper of this type, JP-A-63-268839,
In 63-268838 and the like, a method utilizing plastic deformation of a metal material is proposed.

(C). Problems to be Solved by the Invention However, such a device is large in size for its energy absorption capacity and its structure is complicated, and there is a problem in installing and using it in each layer of the structure.

In addition, when an elasto-plastic damper is installed on a wall of a structure to suppress vibration, the required energy absorption capacity varies depending on the position and size of the installed wall. Also, it is necessary to prepare a plurality of types of elasto-plastic dampers having different energy absorbing capacities. Usually, in order to adjust the energy absorption capacity of an elasto-plastic damper, its total length is changed, or a plurality of elasto-plastic dampers having a constant energy absorption capacity are installed in parallel, but the total length is changed. When an elasto-plastic damper is constructed with a shape,
The damper itself is a dedicated part that corresponds only to a specific structure, and it lacks versatility, and when the required energy absorption capacity increases, the installation length required for elasto-plastic damper installation becomes too long. Therefore, there is a risk that the installation may be hindered in a place where the installation size is limited, such as between the wall and the beam. Further, in the method of installing a plurality of elasto-plastic dampers in parallel, although the versatility of each elasto-plastic damper can be maintained, it is unavoidable that the installation length of the whole becomes long, and likewise to the wall. There is a risk that the installation to and from the beam will be obstructed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a small-sized elasto-plastic damper having a high energy absorption capacity in order to solve the above-mentioned drawbacks.

Another object of the present invention is to provide a highly versatile elasto-plastic damper capable of adjusting its energy absorption capacity according to the condition of the construction site without changing its installation length. It is what

(A). Means for Solving the Problems That is, the present invention relates to a base plate (15, 15) provided so as to face each other and a vibration energy formed in a plate shape installed so as to connect both of them. An installation surface (15) having one or more absorption grids (16), on which the vibration energy absorption grid of the base plate is installed.
a), the width (W1) in the direction perpendicular to the installation direction of the vibration energy absorption grid is formed to be twice or more the plate thickness (W2) of each vibration energy absorption grid, and A plurality of energy absorbers (16b) are provided in parallel in the base plate direction with a slit (16a) interposed therebetween.

It should be noted that the numbers in parentheses indicate the corresponding elements in the drawings for the sake of convenience, and thus the present description is not limited to the description in the drawings. The same applies to the section "(e). Action" below.

(E). Action With the above-described configuration, the present invention acts so that the vibration energy is absorbed by the plastic deformation of the vibration energy absorption grating (16).

(F). Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an example of a frame built-in type vibration damping device using an elasto-plastic damper according to the present invention, FIG. 2 is a diagram showing an example of a frame built-in type vibration damping device, and FIG. 3 is a frame built-in type damping device. FIG. 4 is a diagram showing still another example of the vibration damping device, FIG. 4 is a diagram showing still another example of the frame built-in type vibration damping device, and FIG. 5 is a diagram showing still another example of the frame built-in type vibration damping device. 6 is a diagram showing still another example of the frame built-in type vibration damping device, FIG. 7 is a diagram showing yet another example of the frame built-in type vibration damping device, and FIG. 8 is another diagram of the frame built-in type vibration damping device. FIG. 9 is a diagram showing an example of an elasto-plastic damper according to the present invention, FIG. 10 is a side view of FIG. 9, and FIG. 11 is a diagram showing another example of an elasto-plastic damper. FIG. 12 is a side view of FIG. 11, and FIG. 13 is a sectional view showing an example of a viscoelastic damper.

As shown in FIG. 1, the structure 1 has pillars 2 which are erected at predetermined intervals, and a beam 3 is horizontally arranged between the pillars 2 so that the pillars 2 are connected to each other. It is provided. Columns 2 and 2 that are adjacent to each other in the horizontal direction and beams 3 and 3 that are adjacent to each other in the vertical direction in the figure
A precast concrete wall 5 is provided in the space surrounded by the wall 5, and four notches 5a for mounting a damper are formed on both upper and lower sides of the wall 5 in the figure. Among the notches 5a, viscoelastic dampers 6, 6 are provided between the notches 5a, 5a on the upper side of the drawing and the beams 3 on the upper side of the drawing, and the notches 5a, 5a on the lower side of the drawing. Elasto-plastic dampers 7, 7 are provided between the lower beam 3 and the beam 3. In addition, the viscoelastic damper 6 of the wall 5
Further, a gap 9 is formed between the pillar 2 and the beam 3 in the surroundings except the portion supported by the elasto-plastic damper 7.

On the other hand, the viscoelastic damper 6, as shown in FIG.
Mounting members 10, 10 having an L-shaped cross section, which are fixed to the side through a base plate 8, are provided in such a manner that the member mounting surfaces 10a, 10a face each other and extend in a direction perpendicular to the plane of the drawing in the drawing. Mounting member with a T-shaped cross section between the surfaces 10a, 10a
11 is the member mounting surface 11a, 11a the member mounting surface 10 of each mounting member 10
It is provided so as to face a and extend in the direction perpendicular to the plane of the drawing. The upper part of the mounting member 11 in the figure is fixed to the beam 3 via a base plate 13, and each member mounting surface 10
A viscoelastic member 12 made of a viscoelastic material is provided between a and 11a in the direction perpendicular to the plane of the drawing, that is, in the directions of arrows A and B in FIG.
It is provided so as to connect between 10a and 11a.

Further, the elasto-plastic damper 7 has base plates 15, 15 provided so as to face each other in the vertical direction, as shown in FIGS. 9 and 10, and each base plate 15 is
The upper part in the figure is attached to the wall 5 side, and the lower part in the figure is attached to the beam 3 side. Between the base plates 15 and 15, as shown in FIG. 10, there are plate-shaped vibration energy absorption grids 16 and 16,
Two base plates 15 and 15 are fixed in the wall thickness direction so as to connect the base plates 15, 15. The vibration energy absorption grid 16 has a plurality of slits 16a formed in the vertical direction in the figure.
A plurality of energy absorbers 16b with 6a interposed therebetween.
Are formed in parallel with each other in the vertical direction, that is, in the base plate direction so that the bent portion 16e is formed on the way.

The vibration energy absorption grid of each base plate 15
The vibration energy absorption grid 1 of the installation surface 15a on which 16 is installed
The installation direction of 6 is a direction perpendicular to the horizontal direction in FIG. 9, that is, the width W1 in the horizontal direction in FIG.
Is formed to be more than twice the plate thickness W2.

Since the structure 1 and the like have the above-described configuration, when the composition 1 is vibrated in the directions of arrows A and B in FIG. 1 due to an earthquake or wind, the beam 3 and the wall 5 are separated from each other. Although relative vibration occurs in the directions of arrows A and B, as long as the vibration is small, a mounting member for the viscoelastic damper 6 shown in FIG. 13 provided between the upper beam 3 and the wall 5 in the figure. The viscoelastic member 12 between 10 and 11 is deformed to absorb the vibration energy. Also, arrows A and B
Vibration in the direction becomes large, and the viscoelastic member of the viscoelastic damper 6
When the vibration cannot be absorbed by 12 alone, the energy absorber of the vibration energy absorption grid 16 of the elasto-plastic damper 7 provided between the beam 3 and the wall 5 in the lower part of FIG. 16b plastically deforms in the directions of arrows A and B in FIG. 9 to absorb the energy. Even in this case, the operation of absorbing the vibration energy by the viscoelastic damper 6 is continued.

In the above-described embodiment, the beams 3 and 3 that are vertically adjacent to each other are used.
The case where the wall 5 is supported between the viscoelastic damper 6 at the upper portion and the elasto-plastic damper 7 at the lower portion has been described, but the supporting mode of the wall 5 is between the wall 5 and the surrounding pillars 2 or beams 3. It goes without saying that any form may be used as long as it is supported via the viscoelastic damper 6 and the elastic-plastic damper 7.

For example, as shown in FIG. 3, the number of the dampers 6 and 7 provided on the upper and lower sides in the figure and the installation positions thereof can be appropriately determined. That is, in the case of FIG. 3, the elasto-plastic damper 7 is
As in the case of FIG. 1, two pieces are provided on both sides of the lower portion of the wall 5, and the viscoelastic damper 6 is provided on the upper center portion of the wall 5. As shown in FIG. 2, the lower end surface 5b of the wall 5 is fixed to the beam 3 and the viscoelastic damper 6 and the elasto-plastic damper 7 are arranged in series in the notches 5a, 5a on both upper sides of the wall 5. It is also possible to connect to and to provide. Further, as shown in FIG. 4, the lower end surface 5b of the wall 5 is fixed to the beam 3 and three notches are formed in the upper portion.
5a may be provided, and the notch 5a may be provided with a viscoelastic damper 6 and an elasto-plastic damper 7 so as to connect the beam 3 and the wall 5. Similarly, as shown in FIG. 5, it is also possible to appropriately increase or decrease the number of the dampers 6 and 7 according to the required vibration damping performance.

In addition, although the said Example demonstrated the case where the wall 5 was provided as an earthquake-resistant element member, the wall 5 is used as an earthquake-resistant element member.
The present invention is not limited to this, but can be applied to the case where the brace 17 is used as shown in FIG. In this case, the column-beam intersections 4, 4
Flange 17a, 1 at the intersection of braces 17, 17 connecting between
7a is provided horizontally, and the viscoelastic damper 6 and the elasto-plastic damper 7 are provided so as to be connected in series in the vertical direction so as to connect the flange portions 17a, 17a. Further, as shown in FIG. 7, it is possible to dispose the viscoelastic damper 6 and the elastic-plastic damper 7 in parallel in the horizontal direction between the flanges 17a, 17a. Further, as shown in FIG. 8, an arm 19 is provided via a pin 3c from the central portion 3a of the lower beam 3 toward the upper beam 3 in the figure, and braces 17 and 17 are provided on the lower portion of the arm 19 above. Column-beam intersection 4,
4 through a pin 3b, and an elasto-plastic damper 7 between the arm 19 and the upper beam 3 on the base plate 15 and the pin 19a.
It is also possible to install the viscoelastic dampers 6 and 6 between both sides of the base plate 15 of the elasto-plastic damper 7 and the column-beam intersections 4 and 4 on the lower side in the figure by pivoting. In this case, the viscoelastic damper 6 includes, for example, the end portions of the mounting members 10 and 10 in the direction perpendicular to the paper surface of the drawing as shown in FIG. Part of rod 6b
It is attached to and configured.

In addition, the elasto-plastic damper 7 is not limited to the configuration shown in FIG. 9, and as long as a large number of energy absorbers 16b are formed between the base plates 15 and 15 with slits 16a in between, a bent portion 16e is formed, Of course, such a shape may be used. That is, as shown in FIGS. 11 and 12, it is naturally possible to use the dogleg shaped energy absorber 16b, and the number of the energy absorbing grids 16 installed is arbitrary.

In order to make it easier to understand the installation mode of the dampers 6 and 7, the installation modes of the dampers 6 and 7 between the beams 3 and 3 and the wall 5 are shown in FIG. 1, FIG. 2, FIG. As shown in FIG. 6 and FIG. 8, a viscoelastic damper 6 and an elasto-plastic damper 7 arranged vertically are referred to as a series type, and as shown in FIG. 4, FIG. 5 and FIG. In addition, the viscoelastic damper 6 and the elasto-plastic damper 7
A type in which is horizontally arranged is called a parallel type.

(G). EFFECTS OF THE INVENTION As described above, according to the present invention, the base plates 15, 15 provided so as to face each other and one plate-shaped plate installed so as to connect the base plates 15 to each other are provided. The vibration energy absorption grid 16 is provided, and the width W1 of the installation surface 15a of the base plate on which the vibration energy absorption grid is installed has a width W1 in a direction perpendicular to the installation direction of the vibration energy absorption grid. Plate thickness W2
Of the vibration energy absorption grid,
Energy absorber 1 with slits 16a interposed between them
Since a plurality of 6b are provided in parallel in the base plate direction, it is possible to form an arbitrary number by simply forming the slits 16a in the steel plate.
Therefore, an energy absorber having a desired energy absorption capacity
The vibration energy absorption grating 16 provided with 16b can be easily formed. Further, since only the slits are formed in the steel plate, there is no mechanically movable part, the structure is extremely simple, and the high-density energy absorber 16b can be formed. It becomes possible to provide.

Further, since the width of the installation surface of the base plate on which the vibration energy absorption grid is installed in the direction perpendicular to the installation direction of the vibration energy absorption grid is formed to be twice or more the plate thickness of each vibration energy absorption grid, According to the energy absorption capacity required in the place where the elasto-plastic damper is installed, two or more energy absorption grids are properly installed between the base plates to set the installation length as the elasto-plastic damper in the horizontal direction in FIG. It is possible to adjust the energy absorption capacity without changing, and it is extremely versatile. In addition, since the installation length does not change even if the energy absorption capacity is increased, the installation can be easily performed in a place where installation dimensions such as walls and beams are limited.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a frame built-in type vibration damping device using an elasto-plastic damper according to the present invention, FIG. 2 is a diagram showing an example of a frame built-in type vibration damping device, and FIG. 3 is a frame built-in type damping device. FIG. 4 is a diagram showing still another example of the vibration damping device, FIG. 4 is a diagram showing still another example of the frame built-in type vibration damping device, and FIG. 5 is a diagram showing still another example of the frame built-in type vibration damping device. 6 is a diagram showing still another example of the frame built-in type vibration damping device, FIG. 7 is a diagram showing yet another example of the frame built-in type vibration damping device, and FIG. 8 is another diagram of the frame built-in type vibration damping device. FIG. 9 is a diagram showing an example of an elasto-plastic damper according to the present invention, FIG. 10 is a side view of FIG. 9, and FIG. 11 is a diagram showing another example of an elasto-plastic damper. FIG. 12 is an eleventh side view and FIG. 13 is a sectional view showing an example of a viscoelastic damper. 7 …… Elastic-plastic damper 15 …… Base plate 15a …… Installation surface 16 …… Vibration energy absorption grid 16a …… Slit 16b …… Energy absorber W1 …… Width W2 …… Plate thickness

Claims (1)

(57) [Claims] 1. A base plate which is provided so as to face each other, and one or more plate-shaped vibration energy absorption gratings which are installed so as to connect the base plates to each other. The width of the installation surface on which the vibration energy absorption grid is installed in the direction perpendicular to the installation direction of the vibration energy absorption grid is formed to be twice or more the plate thickness of each vibration energy absorption grid. , An elasto-plastic damper formed by arranging a plurality of energy absorbers in parallel in the direction of the base plate with slits interposed therebetween.