JPH0526275A - Resilient plastic damper - Google Patents

Abstract

PURPOSE:To prevent one generation or an additive axial tension by a method wherein a resilient plastic damper arranged between structures forms a rotary body in the shape of a filled-spandrel in cross section, the one end of two ends being a mounting part is fixed to the structure and the other end is inserted in the insertion hole of the structure, and an intermediate part is formed in a vertical shape responding to bending moment distribution. CONSTITUTION:A resilient plastic damper A is arranged between structural members 1 and 1 and formed in the shape of a rotary body in the shape of a filled-spandrel in cross section so that it is deformed during relative movement in the arbitrary directions of the two structural members to absorb structure vibration energy. The damper A comprises mounting parts 2 at two ends and a damper part 3 being an intermediate part, and the damper part 3 is formed in a vertical shape responding to bending moment generated during exerting of an external force and forming a curve producing a dynamical unit stress in an axial direction. Meanwhile, the mounting part 2 is fixed to the structural member 1 comprising a head part 4 and a thread part 5. The other mounting part 2 is formed in a circular shape and inserted in an insertion hole 6 formed in the structure 1 and moved in an axial direction. Thus, since, no axial tension is generated at the damper A, during execution of a work, mounting of the damper A can be carried out at any time.

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 is arranged between structural members or between a structural member and a non-structural member to absorb energy during an earthquake or the like.

[0002]

The applicant has previously developed various compact dampers for suppressing the vibration of the structure. One of them is the elasto-plastic damper disclosed in Japanese Patent Laid-Open No. 3-66936. Since this damper fixes both ends such as its upper and lower ends, it is troublesome to install, and if you fix the damper and then place concrete on the upper floor,
The load acts on the damper as an axial force, and due to the action of the axial force, the proof strength and the deformability of the damper are poor. Also, due to the structural design, axial force will be generated in the damper even if it is installed on the outer peripheral portion where axial deformation will occur during an earthquake.

Therefore, the present invention has developed a damper which can be easily mounted without generating an additional axial force on the damper.

[0004]

SUMMARY OF THE INVENTION The present invention is an elasto-plastic damper, which is disposed between structural members or between structural members and non-structural members and deforms when the two relatively move in arbitrary directions to reduce vibration energy of the structure. It is a rotating body with a full-filled cross section so as to absorb it, consisting of mounting parts at both ends and damper parts in the middle
The damper part has an upright shape that corresponds to the bending moment distribution generated when an external force is applied. It is movable.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 (a) shows the basic form of the present invention.
This elasto-plastic damper A is arranged between the structural members 1 and 1 or between the structural member and the non-structural member, and is deformed when the both relatively move in arbitrary directions to absorb the vibration energy of the structure so as to absorb the vibration energy of the structure. It has a rotating body shape and is composed of a mounting portion 2 at both ends and a damper portion 3 in the middle. The damper portion 3 has an elevational shape of a curve corresponding to a bending moment distribution generated when an external force is applied and having a constant stress in the axial direction, One end of the mounting portion 2 is fixed to the structural member 1 by providing a head 4, a screw 5 or the like. The other end of the mounting portion 2 is provided with an insertion hole such as a round hole 6 in the structural member 1, and the mounting portion 2 having a circular cross section is inserted therein, and is free to move in the axial direction.

In FIG. 1 (b), in order to facilitate the processing, the curved portion is formed in a straight line shape having substantially the same action. In addition, the diameter is increased in order to increase the bearing pressure of the mounting portion 2.

FIG. 1 (c) shows a case where the mounting portion 2 is fixed to the structural member 1 by the head 4 and the nut 7 at one end.

In FIG. 1D, the other end is movable with a substantially spherical shape.

FIG. 2 shows a case where the present invention is applied to the wall column 8, and here, the wall column of steel frame structure and RC wall is shown.

By the relative deformation of the upper and lower wall columns 8, the damper A can be deformed and energy can be absorbed. Attach the damper A to the mounting structural members 1 and 1. To adjust the position of the upper and lower damper holes, bolt the upper side,
The bolt holes are loose holes, and the wall pillar r and the mounting member 1a
Insert a filler plate between and to adjust the positions of the upper and lower holes.

FIG. 2 (b) shows a case of a steel wall column, and FIG. 2 (c) shows a case of an RC wall column.

3 is applied to the beam end, a hole is made in the flange of the beam end, the structural material 1 serving as a mounting material is attached to the pillar 9, and the damper A is inserted into each hole for installation. The positions of the upper and lower holes are adjusted at the joint between the mounting member 1 and the pillar 9.

FIG. 4 shows a case where the present invention is applied to the central portion of the beam, the central portion of the beam is cut, structural members 1 serving as mounting materials on both sides thereof are provided, a damper A is inserted therein, and one side is tightened with a nut so as not to shift. It is done like this.

FIG. 5 shows an example of application to a curtain wall, in which a damper A is arranged between a beam 10 and a mounting bracket 12 projecting from the curtain wall 11.

[0015]

According to the present invention, which has the above-described structure, only one end of the damper is fixed and the other end is axially movable and free, so that no axial force is generated in the damper. Therefore, no axial force is generated in the damper during construction, so that the damper can be attached at any time.

Further, since it has a circular cross section, it is possible to absorb energy from any direction.

[0017]

[Brief description of drawings]

FIG. 1 is a front view of a damper, in which (a), (b), (c), and (d) show modified examples.

FIG. 2 is a general view when applied to a wall column, and (b) and (c) are partial modifications.

3 (a) is a front view and FIG. 3 (b) is a sectional view when applied to a beam end.

FIG. 4 is a front view when applied to a beam central portion.

FIG. 5 is a cross-sectional view when applied to a curtain wall.

[Explanation of symbols]

A ... Elasto-plastic damper, 1 ... Structural member, 2 ... Mounting part, 3 ...
Damper part, 4 ... Head part, 5 ... Screw, 6 ... Round hole, 7 ... Nut, 8 ... Wall column, 9 ... Column, 10 ... Beam, 11 ... Curtain wall, 12 ... Mounting bracket.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyuki Miyagawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Taiji Kurokawa 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Nobuhiro Kobayashi 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Kazuhide Yoshikawa 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 Kashima Construction Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. A full-filled type which is arranged between structural members or between structural members and non-structural members and deforms when they relatively move in arbitrary directions to absorb vibration energy of the structure. It has a rotating body shape in cross section, and consists of mounting parts at both ends and a damper part in the middle. An elasto-plastic damper characterized in that the other end is inserted into the insertion hole of the structural member and is movable in the axial direction.