JP2000248775A - Friction damper and wall body using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a friction damper inexpensive enough to adopt to a prefabricated housing and reliable enough to show a stable sliding load and to sufficiently reduce noises during friction. SOLUTION: A friction damper has stainless plates 8, 8 laid between each of a pair of first plates 6, 6 and a second plate 7. These plates are friction- joined with joint bolts 22, 22 so that sliding can be caused between the electrodeposited coating surface of the second plate 7 and each of the surfaces of the stainless plates 8, 8 when a preset or more load is applied thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction damper that absorbs vibration energy by frictional resistance caused by slippage between frictionally joined members, and a wall using the same.

[0002]

2. Description of the Related Art In recent years, various types of vibration dampers have been used to improve the earthquake resistance and wind resistance of buildings.
For example, a type that absorbs vibration energy by plastically deforming a steel material when a predetermined load is applied, a type that absorbs vibration energy by viscous resistance of a viscoelastic body represented by an oil damper, There is a type in which vibration energy is absorbed by frictional resistance caused by slippage between plates, that is, relative displacement.

[0003]

However, those utilizing the plastic deformation of the steel material remain unreliable with respect to the reliability of fatigue failure when subjected to repeated deformation. Since the elastic body itself has a temperature dependency, there has been a problem that use conditions are limited.

[0004] On the other hand, those utilizing the friction of the joining plate have no problems of fatigue destruction and temperature dependence upon repeated deformation and have a simple structure. However, special treatment is required for the friction surface of the joining plate to suppress the generation of noise during friction and to obtain a stable sliding load. It was very expensive.

[0005] Also, in the patent gazette (registered No. 2756997),
There is disclosed a friction damper in which a sandwiching member is interposed between joining plates, and these members are friction-joined by tightening them with high-strength bolts for the purpose of stability of sliding load, reduction of noise at the time of friction, prevention of wear, and the like. More specifically, a structure in which the surface of a sheet made of lead, rubber, or a soft synthetic resin is covered with a thin steel sheet and reinforced is used as the sandwiching material, so that the production cost can be kept relatively low. However, even in this case, the sliding load was not sufficiently stable, and rust was generated on the surface of the sandwiched material due to long-term use, and the sliding load was sometimes changed, resulting in poor reliability.

The present invention solves the above-mentioned problems and can obtain a stable sliding load at a low cost that can be adopted in a prefabricated house, and can sufficiently reduce the generation of noise during friction. And a highly reliable friction damper and a wall body using the same.

[0007]

In order to solve the above-mentioned problems, a friction damper according to the present invention has a stainless steel material interposed between a first member and a second member, and has a load larger than a predetermined value. In this case, these members are friction-joined by joining bolts so that slippage occurs between the first member and the stainless material and / or between the second member and the stainless material. I have.

When a stainless steel material is interposed between a pair of first members and a second member inserted between the first members and a load of a predetermined magnitude or more is applied, the first member is pressed. These members are friction-joined by joining bolts so that slippage occurs between the member and the stainless material and / or between the second member and the stainless material.

A bolt insertion hole is formed in one of the first member and the second member to allow movement of the joining bolt, and the other member and the stainless steel material are formed in the bolt insertion hole. Is inserted and tightened. Further, a high-strength bolt is used as the joining bolt, a steel material is used as a friction surface material of the first member and / or the second member, and the steel material is subjected to electrodeposition coating. .

[0010] The wall member of the present invention may be configured such that one of the first member and the second member is connected to a structural material such as a pillar or a beam, and the other is connected to a brace material. The material and the brace material are connected via the friction damper.

[0011] Further, another wall body may include the first member or the second member.
One of the members is connected to the divided brace material on one side, and the other is connected to the other brace material on the divided side, so that the divided brace materials are connected to each other via the friction damper. It is characterized by doing.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view of a friction damper according to one embodiment of the present invention, FIG. 2 is a front view showing a framed structure of a wall body, FIG. 3 is an enlarged front view of a friction damper portion of the framed structure, and FIG. Similarly, FIG. 5 is a longitudinal sectional view showing a state in which slippage occurs between members.

As shown in FIG. 2, a friction damper (1) according to the present embodiment has a shaft set constituting a wall of a building.
A beam (50) made of H-section steel and a brace material (5
It is interposed between it and one end of 1). In the figure, (52) is a column made of a rectangular steel pipe, and the upper end of the column (52) is a capital member.
The lower end of the column (52) is connected to the beam or the base (55) made of H-section steel through the column base member (54) via the column (53). And the lower end of the brace material (51) is
Connected to 4).

The friction damper (1) is inserted between a pair of first members (hereinafter, referred to as "first plates") (6) (6) and the first plates (6) (6). Second member
(Hereinafter referred to as "second plate.") A pair of stainless steel having a thickness of about 1 mm to 2 mm interposed between (7) and the first plate (6) (6) and the second plate (7). (Hereinafter referred to as “stainless steel plate”) (8) and (8).

The first plates (6) and (6) are made of a brace material (51).
The second plate (7) is connected to the lower flange (12) of the beam (50) by connecting bolts (13) (13). ) Is formed of a steel plate integrally extended from a mounting plate (14) mounted through the mounting plate.
And the first plate (6) (6) and the stainless steel plate
(8) A pair of bolt insertion holes (11) and (11) are formed in (8), and a pair of bolt insertion holes extending in the direction of the brace material (51) are formed in the second plate (7). Long holes (15) and (15) are formed. The surface of the first plate (6) (6) and the surface of the second plate (7) are coated with an ordinary steel coating, specifically, an electrodeposition coating using an epoxy resin-based cationic electrodeposition coating. I have.

The stainless plates (8) (8) are interposed between the first plates (6) and (6) and the second plate (7) so that the first plates (6) and (6) are interposed. A plate washer (21) having circular holes (20) and (20) for bolt insertion outside the first plates (6) and (6).
The first plate (6) matched with each other by combining (21)
The circular holes (11) (11) of (6), the long holes (15) (1) of the second plate (7)
Insert the joining bolts (22) and (22), which are high-strength bolts, into the circular holes (20) (20) ... of the washer (21) and the washers (21), respectively, and insert nuts (23) and (23) at their ends. These plates are frictionally joined by screwing and tightening.

In the friction damper (1) thus constructed, the joining bolts (22) (22) in the direction of the brace material (51) are within the range of the long holes (15) (15) of the second plate (7). Therefore, when a load equal to or more than a predetermined amount is applied, as shown in FIG. 5, the brace material (8) is placed between the stainless steel plates (8) and (8) and the second plate (7). 51) Sliding in the direction, that is, displacement occurs, and vibration energy is absorbed by frictional resistance at this time. That is, a friction surface is constituted by the electrodeposition-coated surface of the second plate (7) and the surfaces of the stainless steel plates (8) and (8).
(6) Since (6) and the stainless steel plates (8) and (8) move integrally, no slippage occurs between them.

The sliding load can be arbitrarily set by appropriately adjusting the number of the connecting bolts (22) and the tightening force. Therefore, before the structural material such as the beam (50) or the brace material (51) is buckled or plastically deformed by the vibration energy of an earthquake or the like, the friction damper (1) functions as described above to absorb the vibration energy. By setting the sliding load in such a way, it is possible to obtain a stable hysteresis property for the entire building, and the joint bolt (22)
Just remove the (22) and replace the friction damper (1),
If the friction damper (1) is slightly damaged, it can be used continuously after the building is adjusted.

Here, in the friction damper (1),
The reason why the friction surface is constituted by the stainless plate surface and the electrodeposition coating surface will be described. FIG. 6 shows an experimental result when a vibration experiment was performed by appropriately changing the friction surface of the friction damper. In Experiment 1 in which stainless steels were combined as a friction surface, the sliding load was not stable, and a loud noise was generated during friction. In Experiment 2 in which Teflon was combined with each other as the friction surface, the Teflon was compressed and collapsed when the axial force of the joining bolt was introduced, so that a predetermined axial force could not be introduced, and the sliding load was too small. In Experiment 3 in which fluorine-processed surfaces were combined as friction surfaces, the hysteresis was highly temperature-dependent, and the sliding load was significantly changed by baking with frictional heat. In Experiment 4 in which stainless steel was used as the friction surface and a very common electrodeposition surface was used, the sliding load was stable, the history was smooth, and the sound during friction was hardly generated. In Experiment 5, in which a slip-promoting tape was used as the friction surface and a very common electrodeposition surface, the slip load was not stable. In addition, in addition to this, experiments were conducted by combining electrodeposition painted surfaces, stainless steels, chromium platings, and the like as friction surfaces. However, better characteristics were obtained than in Experiment 4 in which stainless steel and the electrodeposition painted surface were combined. No combination could be obtained.

Therefore, based on such experimental results,
As the friction surface, a combination of stainless steel and an electrodeposition painted surface is adopted. As a result, generation of noise during friction can be almost eliminated, and a stable sliding load can be obtained. Moreover, it is possible to prevent the generation of rust at the frictional portion, and thereby it is possible to secure a stable sliding load even after long-term use.

FIG. 7 shows a friction damper according to another embodiment.
(30) is shown. This friction damper (30) comprises a first plate (32) having a circular hole (31) made of a steel plate coated with electrodeposition.
And a second plate (34) having a long hole (33) made of a steel plate also subjected to electrodeposition coating, with a stainless steel plate (35) interposed therebetween. (35) and the second plate (34) are friction-welded by fastening them with the joining bolts (22) (22) so that slippage occurs. The friction damper (30) requires a smaller number of parts and is simpler than the friction damper (1) in which the second plate (7) is inserted between the pair of first plates (6) (6). It has a structure. In addition, other configurations and operational effects are the same as those of the above-described friction damper (1).

FIG. 8 shows an example of a frame structure of a wall body using a friction damper (30). In this wall,
Instead of using the diagonal brace material as described above, using a pair of substantially triangular brace materials (41) (41), these brace materials (41) (41) are pillars (42) (42), It is arranged in a portion surrounded by the beam (43) and the base (44). Then, a first plate (32) is welded to a corner portion of the brace material (41) on one side,
A second plate (34) is welded to the corner of the divided brace material (41) on the other side.
With the stainless steel plate (35) interposed between the first plate and the second plate (34), these plates are connected with the connecting bolts (22) (2)
The brace material (4
1) (41) are connected via a friction damper (30). In the drawing, (45) is a long bolt for fixing the upper end of the brace material (41) to the beam (43), and (46) is fixing the lower end of the brace material (41) to the base (44). Anchor bolt, (47)
Is a lag screw for fixing the brace material (41) to the column (42).

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that many modifications and changes can be made to the above-described embodiment within the scope of the present invention. For example,
In the above embodiment, the long hole for inserting the bolt is formed on the second member side, but the long hole may be formed on the first member side. In addition, by forming a long hole in the first member and the second member, slippage occurs between both the first member and the stainless member and between the second member and the stainless member. It may be configured as follows. Further, in the above-described embodiment, the stainless steel material is provided separately from the first member and the second member. However, as long as the stainless steel material is interposed between the first member and the second member, for example, the stainless steel material may be used. The material may be integrally embedded in the first member or the second member, or may be configured as a part of the first member or the second member. Further, the first member is connected to a structural material side such as a beam, and the second member is connected to the second member.
May be connected to the brace material side to form a shaft assembly of the wall body. Still further, the friction member (1) may be used to connect the brace materials, and the friction damper (30) may be used to connect the structural material and the brace material to form a shaft assembly of the wall.

[0024]

As described above, in the friction damper of the present invention, the stainless material is interposed between the first member and the second member so that slippage occurs between the member and the stainless material. As long as the general friction coating is applied to the friction surface on the member side, a stable sliding load can be obtained without the need for special treatment for the friction surface as in the past. And the generation of noise at the time of friction can be significantly reduced. Moreover, it is very inexpensive and can be fully adopted in prefabricated houses. Further, by using a stainless steel material, it is possible to prevent the generation of rust on the frictional portion, secure a stable sliding load for a long period of time, and further improve the reliability.

Also, by using a wall constructed by connecting the structural material and the brace material via the friction damper, or by connecting the divided brace materials, a building exhibiting excellent seismic performance can be provided. Can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a friction damper according to one embodiment of the present invention.

FIG. 2 is a front view showing a frame structure of a wall body.

FIG. 3 is an enlarged front view of a friction damper portion of the shaft structure.

FIG. 4 is a longitudinal sectional view of the same.

FIG. 5 is a longitudinal sectional view showing a state when a slip occurs between members.

FIG. 6 is a diagram showing experimental results when a vibration experiment is performed by appropriately changing the combination of friction surfaces of a friction damper.

FIG. 7 is a longitudinal sectional view of another friction damper.

FIG. 8 is a front view showing a frame structure of a wall formed by connecting brace members with another friction damper.

[Explanation of symbols]

 (1) (30) Friction damper (6) (32) First member (first plate) (7) (34) Second member (second plate) (8) (35) Stainless steel material (stainless steel plate) (15) (33) Bolt insertion hole (long hole) (22) Joint bolt (41) (51) Brace material (50) Beam

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04B 2/56 E04B 2/56 F16F 15/02 F16F 15/02 E (72) Inventor Toshifumi Oki North of Osaka City No. 1-88, Oyodonaka-ku, Sekisui House Co., Ltd. (72) Inventor Takashi Kawado 1-1-88, Oyodonaka, Kita-ku, Osaka-shi Sekisui House Co., Ltd. F-term (reference) 2E002 EB12 FA02 FA03 FA03 FA06 FB15 HA02 HB02 HB14 JA01 JA02 JA03 JB02 JB14 LA01 LA03 LB02 LB03 LB09 LB13 LC02 LC11 MA12 MA43 MA44 2E125 AA03 AA13 AA18 AA33 AB01 AB12 AB16 AC15 AC16 AC23 AG03 AG04 AG12 AG41 AG56 AG57 BB01 BE08 BB09 BB01 BB08 BB01 BB08 BB01 BB08 BB08 BB09 BB08 CA04 CA05 CA06 CA07 CA09 CA14 CA15 EA00 EA26 EA27 EB01 3J048 AA07 AC01 BC08 BE12 DA04 EA38

Claims (8)

[Claims] 1. A stainless steel material is interposed between a first member and a second member, and when a load equal to or more than a predetermined magnitude is applied, between the first member and the stainless material and / or between the first member and the stainless material. A friction damper characterized in that these members are friction-joined by joining bolts so that slippage occurs between the second member and the stainless material. 2. A stainless steel material is interposed between a pair of first members and a second member inserted between the first members, and when a load equal to or more than a predetermined magnitude is applied, the first member is pressed.
A friction damper characterized in that these members are friction-joined by joining bolts so that slippage occurs between the member and the stainless material and / or between the second member and the stainless material. 3. A bolt insertion hole for allowing movement of the joining bolt is formed in one of the first member and the second member, and the other member and the stainless steel material are formed in the bolt insertion hole. The friction damper according to claim 1, wherein a joining bolt penetrating through is inserted and tightened. 4. The friction damper according to claim 1, wherein a high-strength bolt is used as the joining bolt. 5. The friction damper according to claim 1, wherein a steel material is used as a friction surface material of the first member and / or the second member, and the steel material is coated. 6. The friction damper according to claim 5, wherein an electrodeposition coating is used as said coating. 7. A friction damper according to claim 1, wherein one of the first member and the second member is connected to a structural material such as a column or a beam, and the other is a brace material. Wherein the structural member and the brace member are connected via the friction damper. 8. A friction damper according to claim 1, wherein one of the first member and the second member is connected to one of the divided brace members, and
A wall body characterized in that the other is connected to the divided brace material on the other side, and the divided brace materials are connected to each other via the friction damper.