JP3511045B2 - Steel bar vibration control device for buildings - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device capable of absorbing horizontal deformation generated in a steel or reinforced concrete middle-high-rise building during an earthquake or strong wind to reduce shaking. .

[0002]

2. Description of the Related Art Conventionally, various means for imparting seismic resistance to a steel frame structure or a reinforced concrete medium-high-rise building have been proposed, and a type in which an elastic material and an elasto-plastic steel rod are used together as a seismic isolation structure (conventional example 1 ) Or a type in which an elasto-plastic damper is interposed between beams on each floor (conventional example 2).

Conventional Example 1 (FIG. 6) Conventional Example 1 was proposed as Japanese Patent Laid-Open No. 60-223576, and as shown in FIG. An elastic body in which metal sheets and elastic rubber sheets are alternately stacked horizontally between end plates and a vertical steel rod are arranged. The elastic body supports a vertical load and is elastically deformed by a horizontal load. Is a seismic isolation device that is plastically deformed by a predetermined elastic deformation with respect to a horizontal load.

Conventional Example 2 (FIG. 7) Further, Conventional Example 2 was proposed as Japanese Patent Laid-Open No. 5-311921, and as shown in FIG. 7, an elasto-plastic damper was stretched between the upper and lower frames. By installing the installed damper unit between the upper and lower beams on each floor and adjusting and changing the height direction of the frame, it can be applied to various seismic reinforcement positions in the building. The elasto-plastic damper has a groove on the upper and lower base plates that are fixed to the upper and lower frames, and a metal plate with a low yield point or a slit with a constant width is formed in a span shape between the upper and lower grooves. The vibration damping device is an elasto-plastic damper that is fitted and fixed in a form in which a plurality thereof are arranged in the vibration direction (A⇔B).

[0005]

In the prior art example 1,
It is effective as a vibration control structure because it has relatively large seismic energy absorption capacity and appropriate rigidity.
Since it is built on the basic structure at the time of building the building, it is difficult to apply it to the means to add damping capability to the existing high-rise building, and since the entire building is damped by the foundation, the device is also large. is there. Therefore, it is desired to provide a means for damping the entire building by means of a downsized vibration damping device in which vibration damping devices for absorbing vibrations are distributed for each floor of the building, and a vibration damping device such as Conventional Example 2 has been proposed. Of.

However, even in the vibration damping device of Conventional Example 2,
Since a metal plate with a low yield point and a metal plate with a slit opening of a certain width are fixed at the top and bottom, the axial deformation is constrained during large deformation when the elasto-plastic damper expands, so the axial force is reduced. However, there is a drawback in that the more horizontal deformation occurs, the more the horizontal load is increased.

Therefore, in order to avoid the drawbacks, it is necessary to use a large metal plate, which leads to an increase in elastic rigidity and an increase in size of the apparatus, and such a metal plate is processed into individual shapes. Since the rigidity and proof stress cannot be adjusted without doing so, it was very complicated to manufacture and install the optimum damper for the building. The present invention provides a novel structure vibration damping device that solves or improves the problems of these conventional examples.

[0008]

In order to fix the steel rod vibration damping device of the present invention to the girder 10 side and the upper girder 10 side of each floor of the building B, for example, as shown in FIG. Of the steel rod 5 with a lower flange 2 and an upper flange 1 of
The one steel rod upper portion 5T or steel rod lower portion 5B is inserted between the upper and lower flanges 1,2 and supported by the flanges 1,2, there on the other hand the you and slide up and down on the flange 1 device
And the flanges 1 and 2 are flange pieces 1a, 1b and 2
Groove steels 1 and 2 provided with a and 2b, and a flange piece 1
a, 1b, 2a, 2b, to the fastening groove 3a at the upper and lower outer periphery
Support for inserting steel rod 5 by attaching snap ring 4
The metal fitting 3 is fixedly attached , each flange edge E is held so as not to bite into the steel rod 5, and the connecting portion between the upper flange 1 and the lower flange 2 of the steel rod 5 is used as an elastic-plastic damper portion 5L. A horizontal load is applied to each floor to reduce shaking (claim 1).

It should be noted that the meaning of "fixing to the girder side of each floor and the upper girder side of each floor" here is one (flange) to the wall 11, stud 12, and pedestal 13 that are rigidly integrated on the girder. Is fixed, and the other (flange) is fixed to the upper beam or the stud 12 integrated with the lower face of the upper beam. In addition, "steel rods" are those that have substantially homogeneous bending characteristics in all directions, and include steel rods with a circular or polygonal cross section, the rigidity is greater than that of a building, and the yield point is Is made lower than that of a building, and the material thereof may be general steel, and extremely mild steel is particularly preferable.

Further, "supporting" of the steel rod 5 by the flange
The steel rod does not have to fall out due to vibration or the like, and may be suspended by attaching a cap to the upper end of the steel rod or by bolting the lower end of the steel rod to the lower flange. The supporting metal is typically carbon steel for machine structure, but any material having a hardness higher than that of the steel rod may be used.

Therefore, the device of the present invention can be arranged in an appropriate number on each floor as long as the upper and lower flanges 1 and 2 can be fixed to a rigid structure, and the vibration can be controlled on each floor according to the structure. By doing so, it is possible to easily and rationally add the vibration control function on each floor not only to new buildings but also to buildings that are in service.

Further, since the elasto-plastic damper is a steel rod,
It is possible to evenly dampen all directions, and the required rigidity for vibration damping can be easily adjusted by selecting the diameter and material of the steel rod and adjusting the elasto-plastic damper part 5L of the steel rod 5 by adjusting the vertical flange spacing. Can be implemented in Moreover, even if a large horizontal displacement is applied to the steel rod, the edges E of the flanges 1 and 2 are held in a manner that they do not bite into the steel rod 5, and the steel rod 5 is slidable in the axial direction. Elongation stress load on the rod can be avoided and rise of horizontal load that can be prevented can be prevented, and the vibration damping device of the present invention exhibits the vibration damping function as designed in the building regardless of the magnitude of horizontal displacement. To do.

The steel rod supporting portion of the flange serves as a stress concentration portion at the time of vibration damping action, but if a separate supporting metal member 3 having rounded corners at the upper and lower ends of the inner peripheral surface is adopted, it becomes It is possible to rationally carry out the production and assembly of the device having the mechanical characteristics for preventing the bite of the support and fulfilling the supporting function by selecting the material and the shape of the supporting metal 3. Also, the upper and lower
Since the flanges 1 and 2 are grooved steel , the upper and lower flanges 1 and 2 can be mounted on a structure without interfering with the mounting of the steel rods 5, and the vibration damping device can be downsized in a narrow space. It can be attached and the work of attachment and detachment is easy.

Then, a cylindrical supporting metal 3 for inserting a steel rod.
The snap ring 4 to the fastening grooves 3a at the upper and lower ends of the outer circumference.
Since it is worn, it is easy to store and assemble the vibration control device.
Even the plastically deformed steel rod can be cut by the elasto-plastic damper part 5L.
It will be possible to remove it, and it will play a role in the event of an earthquake and break.
If you lose it, you can easily replace it .

Further, it is preferable to fix the upper end portion 5T of the steel rod to the upper flange 1. In this case, even if the horizontal displacement is repeatedly applied to the steel rod 5 due to the vibration of the building, it is possible to prevent the steel rod as the damper from rotating and deforming in a direction other than the horizontal stress acting surface. The function according to the structural design characteristic value given as an elasto-plastic damper can be reliably exhibited.

The upper flange supporting metal 3 and the lower flange supporting metal 3 defining the elasto-plastic damper portion 5L of the steel rod 5 are chamfered on the inner surface into a circular arc surface 3C having a protruding cross section to reduce the frictional resistance. Is preferred. The frictional resistance reduction treatment is typically a Teflon (trademark) coating, but may be a mirror finish. In this case, the steel rod 5 is displaced smoothly following the deformation of the building, and the contact state with the inner surface of the support metal 3 on the outer circumference of the steel rod can always maintain the line support on the peripheral surface, so that the building and the steel rod 5 are Even at the time of large displacement, it is possible to completely prevent the upper and lower ends of the inner surface of the support metal 3 from biting into the steel rod 5, and the steel rod 5 can surely perform the elasto-plastic damper function as designed.

Further, it is preferable to mount a plurality of steel rods 5 on the vibration damping device. Since the steel rods 5 are attached to the flanges by inserting into the upper and lower flanges, it is easy to insert and attach the desired number of steel rods, and especially when inserting into the upper and lower flange pieces when the flanges are groove steel. It is easy to attach multiple pieces. Therefore, even if there is a restriction on the fixing position of the flange to the building, it is possible to freely add the design vibration damping function, and in combination with the adjustment of the elastic-plastic damper portion 5L by adjusting the distance between the upper and lower flanges 1 and 2. Therefore, it is possible to easily provide an optimum vibration damping function according to the rigidity and proof strength of each floor of the building.

The upper end portion 5T of the steel rod 5 has an upper groove steel 1
Each supporting metal member 3 is fixed to the upper flange piece 1a by screwing means.
Is preferably fixed to each flange piece 1a, 1b, 2a, 2b by mounting the snap ring 4 in the fixing groove 3a at the upper and lower ends of the outer periphery. In this case, it is easy to store and assemble the vibration damping device, and the plastically deformed steel rod also has the elastic-plastic damper portion 5L.
It becomes possible to remove it by cutting with, and the maintenance of the vibration damping device can be rationalized.

Further, the steel rod vibration damping device is provided with an upper supporting steel plate 6 and a lower supporting steel plate 7 having a substantially T-shaped cross section for fixing to the building B, and an upper groove steel is attached to a mounting surface 6b of the upper supporting steel plate 6. It is preferable that the web 1C of No. 1 is detachably fixed to the mounting surface 7b of the lower supporting steel plate 7 with the web 2C of the lower groove steel 2. In this case, the vibration damping device can be attached as long as the upper and lower supporting steel plates 6 and 7 can be fixed to the building with the fixed substrates 6a and 7a. Since they can be fixed back to back, the layout space of the vibration damping device according to each floor of the building can be rationalized, and the degree of freedom in the design of incorporating the vibration damping device into the building can be improved.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION [Structure of Vibration Control Device (FIG. 1)] As shown in FIG. 1, the vibration control device includes (a) upper and lower support steel plates 6 and 7 to be attached to a building, and (b) support steel plate 6. , The upper and lower groove type steels 1 and 2 to be attached to (7), (c) the cylindrical support metal fittings 3 closely fitted to the respective flange pieces 1a, 1b, 2a, 2b of the groove shape steels 1 and 2, (d) each support metal material 3 It is provided with a steel rod 5 penetratingly inserted therein, and a mounting bolt S for fastening (e) the channel steels 1 and 2.

The overall structure of the vibration damping device is as shown in FIG.
The steel rods 5 are inserted in the upper and lower flanges 1 and 2 of the channel steels arranged at intervals so that the steel rods 5 are
The upper end portion 5T is welded and fixed to the upper flange piece 1a of the upper flange, and the upper flange piece 1b and the upper and lower flange pieces 2a and 2b of the lower flange 2 are unconstrained. The part that becomes a hand-over letter in between,
That is, the lower flange piece 1b of the upper groove section steel 1 and the lower groove section steel 2
A portion 5L extending between the upper flange piece 2a and the upper flange piece 2a is an elasto-plastic damper portion.

The supporting steel plate 6 (7) is a T-shaped member having a sufficient strength, and has a 22 mm-thick fixing substrate 6 a (7 a) integrally fixed to the building B side by welding or the like, and the channel steel 1.
The mounting surface 6b (7b) having a thickness of 16 mm for fixing the web 1C (2C) of (2) is provided. Each channel steel 1
(2) is a general commercial product of 200 (width) × 90 (depth) × 8 (web wall thickness) × 13.5 (flange wall thickness), which is cut into a length of 500 mm. As shown in FIG. 3 (A), the commercially available product has flange pieces 1a, 1b (2a, 2
Since b) has a taper due to the roll treatment, a tapered washer 9 is attached to the mounting portion of the support metal 3 so as to have an equal thickness, and the insertion hole H ₂ for closely inserting the cylindrical support metal 3 into each flange piece ( 38φ) are drilled at equal intervals (100 mm intervals).

As shown in FIG. 2 (A), the support metal 3 has an outer diameter d ₂ (38 m) which is closely fitted to the insertion hole H ₂ of the flange piece.
m), the upper end and the lower end are provided with fastening grooves 3a, and the inner surface is chamfered into a protruding circular arc surface 3C, and the inner diameter d ₁ is a size with which the steel rod 5 is in close contact with the supporting metal. Is made of carbon steel for machine structural use, and the inner peripheral surface 3f is made of Teflon.
(Trade name) is applied for coating. As the steel rod 5, a plurality of commercially available round rods having a diameter of 28 mm and made of ordinary steel (JIS-SS400) are prepared.

[Installation of Damping Device] FIG. 5 illustrates an installation position of the damping device.
3A and 3B schematically show a mode of attachment to a wall 11, a stud 12 and a pedestal 13, respectively. That is, the lower supporting steel plate 7 is fixed to a part of the rigid structure on the side of the girder 10 on each floor, and the upper supporting steel plate 6 is fixed to the rigid structure on the side of the upper girder 10 on the upper floor via the fixing substrates 6a and 7a, respectively. The installation position of the vibration damping device for each floor of the building B, the number of steel bars used, and the number of installations are determined by the vibration damping function addition value for each floor of each target building B calculated in advance. The damper has a rigidity higher than that of the building and a plastic deformation point (yield point) lower than that of the building.

Further, four steel rods 5 are inserted into the upper and lower groove type steels 1 and 2 through the respective supporting metal members 3, and the protruding upper end portions 5T of each steel rod 5 are inserted into the upper flange piece 1a of the upper groove type steel 1. Then, the upper groove type steel 1 and the lower groove type steel 2 are fixed back to back to the mounting surfaces 6b and 7b of the supporting steel plates with the mounting holes H ₁ and the mounting bolts S, and the vibration damping device is installed at one place. Of 2
Secure the pieces back to back.

As shown in FIG. 3, the support metal fitting 3 fitted to each flange piece is fitted with a snap ring 4 in the fastening groove 3a so as to be prevented from being pulled out. The distance between the lower flange piece 1b of the grooved steel 1 and the upper flange piece 2a of the grooved steel 2, that is, the elasto-plastic damper portion 5L of the steel rod 5 is 100 mm in this example.
5L is an item that is appropriately changed and set by adjusting the imparting function together with the diameter of the steel rod 5.

[Effects of Embodiments] In order to confirm the deformation characteristics of this device and the performance of the supporting metal, a static test was conducted along with a comparative example for a test body in which the length of the elastic-plastic damper portion 5L of the steel rod was 10 cm. The following results were obtained when the load-deformation curve of the elasto-plastic deformation in which the horizontal axis represents the displacement and the vertical axis represents the layer shear force was obtained by carrying out the structural experiment by dynamic cyclic loading. This device: A center-blown spindle-shaped load-deformation curve with good energy absorption was exhibited, and the vertical displacement of the steel rod was also smoothly deformed, and the performance as a damper was fully exhibited.

Comparative Example 1 (using a support metal for the inner peripheral cylindrical hole and fixing the upper and lower ends of the steel rod with bolts): Almost the same as this device up to a deformation of 2 cm, but restraining the vertical displacement of the steel rod with bolts Therefore, as the deformation increases, tensile axial force is generated in the steel rod and the load increases,
The tensile axial force gradually narrows the cross section of the steel rod, so that the load tends to decrease thereafter, and the load deformation curve has a small area where both ends extend in the displacement direction and the center becomes slightly narrow, that is, It has a modified spindle shape that does not absorb much energy.

Comparative Example 2 (a steel rod is directly inserted into the drill hole of the flange, and the lower end is slidable): A slip phenomenon that mechanically occurs until the gap between the steel rod and the drill hole comes into contact is observed near the origin of the load. The vertical displacement of the steel rod was not smooth either, and the corners of the drill holes bite into the steel rod, and the steel rod eventually broke. The load deformation curve has a step due to the slip phenomenon, the displacement direction is short and the area is small,
That is, it became a substantially diamond shape with a small amount of energy absorption. As a result, it was found that it is important to support the steel rod slidably on the flange and to prevent the flange side from biting in order to exert the damper function excellent in energy absorption. .

The long side is 26 m, the short side is 21 m, and the plane is 3 ×.
A case where the device of the present embodiment is applied to four internal skeletons in a stud type (FIG. 5 (B)) for a 14-story steel-framed office building with a floor height of 4 m in 3 spans, When the response characteristics when not applied are analyzed and examined under the following conditions,
The following results were obtained. Conditions: Steel rod diameter 28φ, Deformable flexible length (Elasto-plastic damper part 5
L) 10 cm, installation amount is 32 for each of the 1st to 6th floors, 7 to 12
28 floors for each floor, 20 floors for each of the 13th and 14th floors, and ELCENTRO-NS and B that seismic waves are often used for high-rise building design
The maximum input speed of CJ-L1 is 25 kine (25 cm / s
ec).

Results: In the interlayer displacement (cm), in the case of no damper, ELCENTRO-NS and BCJ-L1 have a little over 1 cm on the 1st and 14th floors and around 3cm on the 10th floor,
From the 2nd floor to the 9th floor, both seismic waves are a little over 2cm, but with a damper, both seismic waves are 1cm on the 1st and 14th floors.
Weak, the 10th floor was a little over 2 cm, and the response amount could be reduced by about 20% with the damper as a whole.

In addition, the layer shear force (t) is 100 tons on the 14th floor with little difference between the presence and absence of a damper, and both seismic waves increase from the 14th floor to the 1st floor from 100 to 700t in sequence, but there is a damper. In case of, both seismic waves are 1
The 4th to 7th floors have the same curve, and the 6th to 1st floors are ELCENTRO-
NS becomes large, and 40t (13th floor) to 180t (1st floor) on both 13th and 1st floor compared to the case without both dampers
The total amount of response (layer shear force) was reduced by about 20%. That is, under the above conditions of this embodiment, the steel frame structure 14
In a one-story office building, the displacement and the shear force between layers are about 20.
% Can be reduced.

Further, the present apparatus can be arranged on a building which is in service as long as the supporting steel plates 6 and 7 are attached, and the size of the front and back sides back to back is about 500 (H) × 500.
Since (L) × 200 (W) mm, H × L × W is 70
Since it can be set within the height of each floor as long as there is a space of 0x700x300mm, there is a high degree of freedom in designing it into a building. Moreover, by adjusting the number of steel rods, the number of installations, the installation position, etc., appropriate vibration damping properties can be imparted to various middle- and high-rise buildings, and vibration damping properties can be imparted when the building is newly constructed or in service, that is,
The function of absorbing the horizontal displacement energy applied to a building by plastic deformation through predetermined elastic deformation of the steel rod can be appropriately and easily applied to various high-rise buildings.

Further, since the steel rod 5 as an elasto-plastic damper is supported by the projecting arc surface of the inner surface 3f of the support metal 3, the supporting point (contact point) when the steel rod is deformed under a horizontal load also moves. By virtue of the fact that the lower end portion 5B is supported by the grooved steel 2 so as to be slidable in the vertical direction, the steel rod 5 is smoothly displaced in response to the horizontal stress, and energy absorption as designed is achieved. Demonstrate performance.

[Others] FIG. 4 is a view showing a support mode of the steel rod 5 to the upper flange 1. In addition to the welding type of (A) adopted in the embodiment, the steel rod 5 of (B) is used. A bolt type in which the upper end is screwed and the upper flange 1 is sandwiched between the upper and lower nuts at the time of installing the device is also possible. Further, tap screw processing is given to the upper end of the steel rod of (C), so that the device can be installed at the time of installing the device. It is also possible to use a washer type in which a hexagon bolt is screwed into the upper end of the steel rod from above through the hole of the large diameter cap to prevent the steel rod 5 penetrating the flange by the cap from falling. The type and the washer type of (C) are advantageous in terms of assembly and maintenance of the vibration damping device.

Further, as shown in FIG. 3 (B), the supporting metal 3 may have an inner surface 3f having a cylindrical surface. Even in this case, if the corner of the edge E is cut, the steel rod 5 has It can prevent biting during deformation. The lower end 5B of the steel rod 5 may be welded or bolted to the flange piece, and the upper end may be slidably projected from the flange piece.

[0037]

As long as the upper and lower flanges 1 and 2 can be fixed to the rigid structure between the lower floor and the upper floor, the vibration damping device of the present invention is
It is possible to arrange an appropriate number on each floor at an appropriate position, and by arranging each floor so as to provide the desired vibration damping performance according to the building, it is possible to simplify the vibration damping performance not only for new construction but also for buildings that are in service. , And can be given reasonably. In addition, since the elasto-plastic damper is a steel rod, it is possible to evenly dampen all directions, and the required rigidity for vibration damping can be selectively adjusted by adjusting the upper and lower flange spacing, selecting and adjusting the thickness of the steel rod, This is possible by adjusting the number of rods used, adjusting the positions of the steel rods, etc. Therefore, there is a large degree of design freedom in terms of imparting damping performance to the target building.

Further, since the steel rod 5 has a configuration in which the edge E of the flange does not bite into the steel rod even when a large displacement is applied, and because the steel rod 5 is slidable in the axial direction, It is possible to avoid the tensile stress load on No. 5, prevent the occurrence of strain hardening phenomenon (hardening phenomenon) of the steel rod 5, and demonstrate the damping function as designed in the building regardless of the horizontal displacement. To do.

Moreover, the support metal for inserting the steel rod is mounted on the outer periphery.
The snap ring 4 was attached to the fastening groove 3a at the lower end.
Therefore, the vibration damping device is easy to store and assemble, and is not plastically deformed.
A steel rod that has been removed by cutting it with the elasto-plastic damper part 5L
It is possible . Therefore, the vibration damping device of the present invention can easily and easily impart a desired vibration damping function to any reinforced concrete or steel-framed high-rise building, and can be easily replaced even if it breaks due to its role during an earthquake. This makes it possible to provide a useful vibration damping device.

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

2A and 2B are perspective views of a support metal of the present invention, in which FIG. 2A shows an inner surface with an arcuate chamfer, and FIG. 2B shows an inner surface having a cylindrical shape.

3A and 3B are partial perspective views of the present invention, in which FIG. 3A is a fitting state of a support metal fitting to a flange piece, and FIG. 3B is a view showing a snap ring for fastening the support metal fitting.

FIG. 4 is a perspective view of a steel rod of the present invention attached to a flange piece, in which (A) is a welding type, (B) is a bolt type, and (C) is a washer type.

5A and 5B are explanatory views illustrating an installation mode of the present invention, in which FIG. 5A is a wall type, FIG. 5B is a stud type, and FIG.

FIG. 6 is an explanatory side view of an installed state of Conventional Example 1.

7A and 7B are explanatory views of Conventional Example 2, where FIG. 7A is an overall view of an installed state, and FIG. 7B is an enlarged front view of an elastoplastic damper portion.

[Explanation of reference numerals] 1: upper flange (groove steel), 2: lower flange (groove steel), 1a, 2a: upper flange piece, 1b,
2b: lower flange piece, 1C, 2C: web, 3: support metal, 3a: fastening groove, 3c: protruding arc surface 4: snap ring, 5: steel rod, 5L: elasto-plastic damper part, 5T: steel rod upper end Part, 5B: lower end of steel rod,
6, 7: Supporting steel plate, 6a, 7a: Fixed substrate, 6b, 7
b: mounting surface, 9: taper washer, 10: girder, 1
1: wall, 12: stud, 13: pedestal, B: building, S: mounting bolt, H ₁ : mounting hole, H
₂ : Insertion hole

Front page continued (72) Inventor Masakazu Takeuchi 1-2-2 Minami-Aoyama, Minato-ku, Tokyo Nissan Construction Co., Ltd. (72) Inventor Takeshu Moriya 1-2-2 Minami-Aoyama, Minato-ku, Tokyo Nissan 6 Construction Co., Ltd. (56) Reference JP-A-9-221829 (JP, A) JP-A-5-26275 (JP, A) Actual Kai-hei 1-98802 (JP, U) Patent 3041462 (JP, B2) ( 58) Fields investigated (Int.Cl. ⁷ , DB name) E04H 9/02 301-351 F16F 7/12 F16F 15/00-15/36 E04B 1/98

Claims (6)

(57) [Claims] 1. A steel rod comprising a lower flange (2) and an upper flange (1) for fixing to a girder (10) side and an upper girder (10) side of each floor of a building (B), respectively. (5) is inserted between the upper and lower flanges (1, 2) to support one end of the steel rod upper end (5T) or the lower end of the steel rod (5B) with the flanges (1, 2) and the other with the flanges (1, 2). ) in a device shall be the slide up and down, each flange (1, 2)
Is a groove with flange pieces (1a, 1b, 2a, 2b)
Shaped steel (1, 2) and flange pieces (1a, 1b, 2
a, 2b) are provided with snaps to the fastening grooves (3a) at the upper and lower ends of the outer circumference.
By attaching the pull ring (4), the steel rod (5) can be inserted.
Secure the cylindrical support metal (3) to each flange (1,
2) The edge (E) is held so as not to bite into the steel rod (5), and the connecting portion between the upper flange (1) and the lower flange (2) of the steel rod (5) is elastic-plastic damper part. (5
L) A steel rod vibration damping device used for a structure that absorbs horizontal load on each floor. 2. The steel rod vibration damping device according to claim 1, wherein the upper end portion (5T) of the steel rod is fixed to the upper flange (1). 3. An elasto-plastic damper part (5L) of a steel rod (5)
The upper flange supporting metal (3) and the lower flange supporting metal (3) that define the
And the frictional resistance reduction process by chamfering to claim 1 or 2
Steel rod vibration control device. 4. The method according to claim 1, wherein a plurality of steel rods (5) are mounted.
The steel rod vibration damping device according to any one of 1 to 3 . 5. The upper end (5T) of the steel rod (5) is fixed to the upper flange piece (1a) of the upper groove steel (1) by screwing means,
Each of the supporting hardwares (3) is attached to each of the flange pieces (1a, 1a,
The steel rod vibration damping device according to any one of claims 1 to 4 , which is fixed to 1b, 2a, 2b). 6. An upper supporting steel plate (6) and a lower supporting steel plate (7) having a substantially T-shaped cross section for fixing to a building (B), the mounting surface (6b) of the upper supporting steel plate (6) being provided. the web (1C) of the upper channel-section steel (1), one attachment surface (7b) to the lower channel-type steel (2) of the web (2C) and removably fixed to claims 1 to 5 of the lower support steel plate (7) The steel rod vibration damping device of item 1.