JPH03161628A - Vibration control damper - Google Patents

Abstract

PURPOSE:To effectively absorb vibration energy acting on a structure by a method wherein plate-like plastic deformation members are connected to the structure and the members are made to generate either elastic or plastic deformation with axial force acted in the direction of axial center when the vibration is applied. CONSTITUTION:Braces 6 and 6 are provided between crossing points 5 and 5 of columns and beams of a structure 1 so that the braces are connected to the crossing points with connecting plates 8. A plurality of plastic deformation members 9 in plate shape are provided in layers to a crossing where the braces 6 and 6 cross each other. When vibration acts on the structure 1, relative vibration is produced between the upper beam 3 and the lower beam 3', making axial force act in the direction of axial center of the brace 6. While the vibration is still small, it is absorbed by elastic deformation of the plastic deformation members 9 and when the vibration becomes larger, the plastic deformation members 9 start to produce plastic deformation and the vibration energy is absorbed by the energy of the plastic deformation, restraining the structure 1 from being affected by the vibration. Thereby vibrations from small to large in scales can be effectively absorbed with a single type of vibration control damper.

Description

DETAILED DESCRIPTION OF THE INVENTION (a). INDUSTRIAL APPLICATION FIELD The present invention relates to a vibration damper that absorbs energy from earthquakes and wind to minimize the shaking of structures during earthquakes and strong winds. (b). 2. Prior Art Conventionally, this type of damper was disclosed in Japanese Patent Application Laid-Open No. 63-2688.
39.63-268838 etc., methods utilizing plastic deformation of metal materials have been proposed. (C). Problems to be Solved by the Invention However, these devices are large in comparison to their energy absorption capacity and have complex structures, which pose problems when installed and used on each layer of a II structure. SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide a vibration damper that is small in size and has a high energy absorption capacity. (d). Means for solving the problem, that is, the present invention provides a plastically deformable member (9) in which a connecting portion (9b) with an external member is formed, and the plastically deformable member (9) has a plastically deformed member (9) formed on the side surface of the plastically deformable member (9). Viscoelastic members (11) that absorb vibration energy generated by elastic deformation of the members are connected in parallel, and a viscoelastic member (11) is further connected to the plastically deformable member (9) on the opposite side of the viscoelastic member (11). It is constructed by connecting and providing a restraining member (10) that restrains the movement of the member (11). Moreover, the present invention provides a plurality of plastically deformable members (9) in parallel with each other, each of which has a connecting portion formed with the external member (9b), and the plastically deformable members (9)
A viscoelastic member (11) is connected in parallel on the side surface of the viscoelastic member (11) to absorb vibrations caused by elastic deformation of the plastically deformable member (9), and the plastically deformable member (9) of the viscoelastic member (11) is ) A restraining member (10) for restraining the movement of the viscoelastic member (l1) is connected and provided on the side opposite to the side connected to the viscoelastic member (l1). Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings.
．． The same applies to the column ``Effect''. (e). Operation With the above-mentioned configuration, in the present invention, the plastic deformation member (9) elastically deforms when small vibrations occur, and the viscoelastic member (work 1) absorbs the vibrations caused by the deformation. ，
The large vibration force is absorbed by the plastic deformation member (9) through plastic deformation.

(f). Examples Examples of the present invention will be explained below based on the drawings. Fig. 1 is a diagram showing an example of a place structure in which the damper according to the present invention is used, Fig. 2 is a diagram showing an embodiment of the damper.
This is a cross-sectional view taken along line ■1■ in the figure. As shown in Fig. 1, the structure 1 has pillars 2 erected at predetermined intervals, and a beam 3 is installed horizontally between each pillar 2 to connect the pillars 2. It is provided. In the space surrounded by columns 2, 2 adjacent in the horizontal direction and beams 3, 3 adjacent in the vertical direction in the figure, there is a place 6, which connects the column-beam intersections 5, 5 in the diagonal vertical direction. 6 are provided so as to intersect with each other via a connecting plate 8, and a damper 7 according to the present invention is provided at the intersection of the places. As shown in FIGS. 2 and 3, the vibration damper 7 has a plate-shaped plastically deformable member 9 made of a steel plate or the like.
A plurality of sheets (three sheets in the case of this embodiment) are stacked at a predetermined interval W1 in the beam thickness direction perpendicular to the plane of the paper in FIG. 1, that is, in the direction of arrows A and B in FIG. 3. There is. Each plastically deformable member 9 has a hole 9a bored in the center, and the hole 9a
Connecting arms 9b with place 6 are formed at four locations around the . As shown in the third @, the ends of the connecting arms 9b are integrally connected to each member 9 via brackets 7a, and the ends of the places 6 are fixed to each bracket 7a. There is. In addition, in the figure, between the plastically deformable members 9 adjacent to each other and on the outside of the left and right plastically deformable members 9, there are each one restraining plate 10 made of aluminum or the like and formed to have the same external shape as the plastically deformable member 9. , a total of 4 sheets are similarly marked with arrow A. They are provided in a stacked manner in the B direction at a predetermined interval W2. The portion facing the connecting arm 9b on the side surface of each restraint plate 10 and the connecting arm 9b on the side surface of each plastically deformable member 9
A viscoelastic member 1 is attached and installed between the restraining plates 10, and a small hole 10a is bored in the center of each restraining plate 10. A connecting bolt 12 and a nut 12a are inserted through the small holes 10a through holes 9a formed in each plastically deformable member 9 to connect the restraining plates 10 to each other. Structure 1 etc. has the above configuration, so if vibration occurs in structure 1 in the directions of arrows C and D in Figure 1 due to an earthquake or wind, etc., the vibration between the upper and lower beams 3 and 3 in the figure and arrow C. Relative vibration occurs in the D direction, and an axial force also acts on the place 6 in the axial direction of the place 6. While the vibration of the structure 1 is small, the vibration damper 7 connected to each place 6 is moved by the bracket 7a. 7a, the plastically deformable member 9 is shown in the direction of the axis of the place 6, which is the arrow E. It is elastically deformed and vibrates in the F direction, and due to the elastic deformation, the viscoelastic member 11 provided between the plastic deformation member 9 and the restraint plate 10 is deformed and absorbs the vibration energy.
Suppress the vibration of the structure. Each of the restraining plates 10 is provided in such a way as to connect the upper and lower viscoelastic members 11 in FIG.
Arrow E of the adhesion site. Since the movement in the F direction is restrained, each viscoelastic member 11 is deformed between the plastically deformable member 9 that deforms elastically and the restraint plate 10, and the vibration caused by the elastic deformation of the plastically deformable member 9 is caused by viscoelasticity. It is effectively absorbed into the member 11. It can exhibit a high vibration energy absorption effect.
Furthermore, since each restraining plate 10 is integrally provided with a connecting seat 12 to restrain each other's behavior, each restraining plate 1
0 follows the elastic deformation of the plastically deformable member 9 via the viscoelastic member 1l. Viscoelastic member 1 moves in direction F.
The occurrence of a situation in which the energy absorption effect of 1 is reduced is prevented. Next, when the vibration of the structure 1 increases, the vibration damper 7, which had been elastically deformed via the place 6 and absorbing vibration energy by the viscoelastic member 11,
In this case, the plastically deformable member 9 starts to plastically deform, and the deformation energy absorbs the vibration energy and suppresses the vibration of the structure 1. It should be noted that the start of elastic deformation of the plastically deformable member 9 can be adjusted as desired by appropriately changing the size, such as the diameter, of the cutout portion, such as the hole 9a, formed in the member. Further, the vibration energy absorption capacity of the vibration damper 7 can be arbitrarily set by adjusting the number of plastically deformable members 9 to be installed to one or more, as appropriate. Further, in the above embodiment, the damper 7 according to the present invention is arranged in the center of the places 6, 6, but the damper 7 according to the present invention is not suitable for the vibration damper 7 that needs to absorb vibration energy. It can be installed in any location, for example between the connecting plate 8 and the place 6, or between a beam and a wall. (g). Effects of the Invention As explained above, according to the present invention, the plastically deformable member 9 is provided with a connection portion with an external member such as the connecting arm 9b, and the elasticity of the plastically deformable member is formed on the side surface of the plastically deformable member 9. Viscoelastic members 11 that absorb vibration energy generated by deformation are connected in parallel, and a restraining plate that restrains movement of the viscoelastic member 11 is provided on the side opposite to the side where the viscoelastic member 11 is connected to the plastic deformation member 9. 10 etc. are connected, the vibration energy of small vibrations is absorbed by the viscoelastic member 11 through the elastic deformation of the plastic deformation member 9, and the vibration energy of large vibrations is absorbed by the plastic deformation member 9 itself. It is absorbed by plastic deformation, and a single vibration damper 7 can effectively absorb vibrations ranging from small amplitudes to large vibrations. Furthermore, since the structure is simple in that the plastically deformable member 9, the viscoelastic member 11, and the restraining member are connected in parallel, there are no mechanically moving parts, making it possible to provide a small and highly reliable vibration damper. In addition, a plurality of plastically deformable members 9 each having a connecting portion with an external member such as a connecting arm 9b are provided in parallel, and the side surface of the plastically deformable member 9 absorbs vibration energy generated by elastic deformation of the plastically deformable member. The viscoelastic members 11 are connected in parallel, and a restraining member such as a restraining plate 10 for restraining the movement of the viscoelastic member 1l is connected to the side opposite to the side where the viscoelastic member 11 is connected to the plastic deformation member 9. In addition to the above-mentioned effects, by appropriately changing the number of plastically deformable members 9, the vibration damper 7 can be provided with any vibration energy absorption ability, resulting in a highly versatile vibration damper. 7 can be provided.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an example of a place structure in which the vibration damper according to the present invention is used, Fig. 2 is a diagram showing an example of the actual travel of the vibration damper, and Fig. 3 is a diagram showing an example of the place structure in which the damper according to the present invention is used.
This is a cross-sectional view taken along line m-■ in the figure. 6... External member (place) 7... Vibration damper 9... Plastic deformation member 9b... Connection part (connection arm) 10...・Restriction member (restraint plate) 11...Viscoelastic member

Claims (2)

[Claims] (1) A plastically deformable member having a connecting portion with an external member is provided, and a viscoelastic member that absorbs vibration energy generated by elastic deformation of the plastically deformable member is connected in parallel to the side surface of the plastically deformable member. A vibration damper further comprising: a restraining member for restraining movement of the viscoelastic member connected to a side opposite to a side where the viscoelastic member is connected to the plastic deformation member. (2) A plurality of plastically deformable members each having a connecting portion with an external member are provided in parallel, and a viscoelastic member is provided on the side surface of the plastically deformable member to absorb vibration energy generated by elastic deformation of the plastically deformable member. A vibration damper configured by connecting the viscoelastic member in parallel and further connecting and providing a restraining member for restraining movement of the viscoelastic member on a side opposite to the side where the viscoelastic member is connected to the plastic deformation member.