JPH10140873A - Building damping structure - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To be excellent in vibration damping performance, can be installed with the same appearance and form as a conventional general frame, furthermore, the damper material can be easily replaced and maintenance is easy. Provided is a vibration control structure for a building that can effectively absorb the vibration generated in the building from a large earthquake to a minute vibration. A brace is installed in an opening surrounded by left and right columns and upper and lower beams in a frame of a building including columns and beams, and the brace is one of structural members including columns or beams. , One brace constituent member 8 fixed to the side, the other brace constituent member 9, and a viscoelastic body 17 interposed between the brace constituent members 8 and 9. I do.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control structure of a building for absorbing vibrations such as seismic motion in a frame of a structure.

[0002]

2. Description of the Related Art In recent years, structures, such as buildings, include:
Safety and reliability are required more than ever, and therefore, various proposals have been made for a vibration damping structure that absorbs and controls vibration such as seismic motion generated in these structures.

[0003] Among these vibration damping structures, particularly, those in which a damper is installed in a structure to absorb vibration energy generated in the structure are widely known. These dampers are generally installed on a wall, part of a pillar or a beam constituting a structure, or on a roof or a foundation.

[0004]

By the way, it is desirable for the above-mentioned damper to have excellent vibration absorption characteristics, and a vibration damping structure using a damper capable of absorbing vibration as efficiently as possible has been desired. . Furthermore, in recent years, many new materials have been developed as constituent materials of such a damper, and in the future, assuming that a more effective material will be developed, the damper can be easily replaced with a new material. There was a need for a building damping structure that was replaceable.

[0005] On the other hand, the above-mentioned damper must be installed so as to efficiently absorb vibrations for the purpose of installation. Therefore, the installation place is limited, or the vibration is reduced by using another device. It was necessary to install it so that it could be absorbed efficiently. Further, this may hinder the structural plan and the architectural plan of the building. Therefore, a vibration damping structure which can be easily installed inside the building with the same appearance and form as a conventional general frame is desired. Was.

When an oil damper is used as the above damper, periodic inspection is required.
If a hysteresis damper such as a steel damper is used, it is necessary to replace the damper part due to wear and residual deformation when the damper part is deformed. There was a need for a structure for damping things.

[0007] Further, vibration generated in a building is
Not only those caused by large-scale earthquakes, but also small- and medium-sized earthquakes and vibrations caused by wind, etc., which adversely affect the livability inside the building without affecting the soundness of the frame itself Therefore, there has been a demand for a vibration damping structure of a building that efficiently absorbs these vibrations.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and its object is to provide excellent vibration damping performance and to be installed in the same appearance and form as a conventional general frame. The damper material is easily replaceable,
An object of the present invention is to provide a vibration control structure of a building that is easy to maintain and that can effectively absorb the vibration generated in the building from a large earthquake to a minute vibration.

[0009]

In the present invention, the following means are employed in order to solve the above-mentioned problems. That is, in the vibration damping structure for a building according to the first aspect, a brace is installed in an opening surrounded by left and right columns and upper and lower beams in a frame of a building including columns and beams. Is provided with one brace constituent material fixed to one side of the structural material composed of columns or beams, the other brace constituent material, and a viscoelastic body interposed between these brace constituent materials. It is characterized by comprising.

[0010] Since the vibration damping structure of this building is configured as described above, when a frame of the building is vibrated due to an earthquake or the like, the viscoelastic body plays a role of a damper. This vibration can be absorbed.
In particular, by interposing this viscoelastic body in the middle of the brace, the appearance can be made completely the same as the brace used for the conventional general structure.

[0011] A vibration damping structure for a building according to claim 2 is the vibration damping structure for a building according to claim 1, wherein the one brace component is made of a first steel tubular body having a rectangular cross section. And the other brace component is made of a second steel tubular body having a rectangular cross section inserted into the first steel tubular body, and the viscoelastic body is an outer surface of the one brace component. And an inner surface of the other brace component.

The vibration damping structure for a building according to claim 3 is the vibration damping structure for a building according to claim 1, wherein the one brace component is made of a steel material having a cross-shaped cross section. The other brace component is made of a steel plate arranged to face the outer surface of the one brace component, and between the one brace component and the other brace component,
The viscoelastic body is interposed.

[0013] In such a vibration damping structure of a building, since the structure as described above is used, when vibration is applied to the frame constituting the building due to an earthquake or the like, the vibration is fixed to the frame by the vibration. In addition, the first and second brace components are displaced, and as a result, shear deformation occurs in the viscoelastic body. This allows the viscoelastic body to absorb the vibration energy of the frame.

[0014] A vibration damping structure for a building according to claim 4 is the vibration damping structure for a building according to claim 2 or 3,
At the end of the overlap region between the one brace component and the other brace component, the one brace component and the other brace component are located between the one brace component and the other brace component. A guide shoe is provided, which allows relative displacement of the brace components in the axial direction and regulates relative displacement in a direction intersecting the axial direction.

[0015] Since the vibration damping structure of this building is constructed as described above, when vibration is applied to the frame, the damper portion made of the first and second brace components and the viscoelastic body is formed. Bending deformation is prevented, and instead,
The second brace component is relatively displaced in the axial direction. As a result, shear deformation is applied to the viscoelastic body, and the viscoelastic body can favorably absorb the vibration energy of the frame.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a drawing schematically showing one embodiment of the present invention. In the figure, reference numeral 1 denotes a frame constituting a building, and a brace 5 is installed in an opening 4 surrounded by columns 2 and beams 3 in the frame 1. The brace 5 is composed of a pair of end component members 6 made of H-shaped steel fixed to the frame 1 and a damper portion 7 provided between them.

FIG. 1 is a cross-sectional view showing the details of the main part of the damper part 7 in an enlarged manner. As shown in the figure, the damper portion 7 has a configuration including brace components 8 and 9.
The brace component 8 comprises a first steel tubular body 10 having a rectangular cross section.
And one end thereof is joined to the end component 6 by a splice plate 11 and a high-strength bolt 12 as shown in FIG. The brace component 9 is formed by joining the end member 13 and the second steel tubular body 14 having a rectangular cross section. The end member 13 is a steel member having an H-shaped cross section. One end of the end member 13 is joined to the end member 6 by a splice plate 11 and a high-strength bolt 12 as shown in FIG.
As shown in the figure, the second steel tubular body 14 is joined. At this time, the end member 13 is joined to the second steel tubular body 14 in a state where the web 13a extends to the inside of the second steel tubular body 14. Further, a rib 15 is provided to reinforce this joint.

The first and second steel tubular bodies 10 and 14 are arranged with the second steel tubular body 14 inserted inside the first steel tubular body 10. In addition, the arrangement is performed in this manner, so that the first and second steel tubular bodies 10, 1 and 1 are formed.
4 forms an overlap region 16.

A viscoelastic body 17 made of rubber asphalt is provided between the outer surface of the first steel tubular body 10 and the inner surface of the second steel tubular body 11 in the overlap region 16.
The guide shoe 18 is provided at an end of the viscoelastic body 17.

FIG. 2 is a view showing the cross section taken along the line AA in FIG. 1. As shown in FIG. 2, the viscoelastic body 17 comprises first and second steel tubular bodies made of a rectangular steel pipe. 10, 1
Between 4 is filled. In forming these, the first and second steel tubular bodies 10 and 14 are separated by a separator, a bearing, or the like, and a viscoelastic body 17 heated and liquefied is poured and molded between them. I just need. FIG. 3 is a view showing the shape of the cross section taken along the line BB in FIG. 1. The guide shoe 18 is provided between the first and second steel tubular bodies 10 and 14 as shown in FIG. Be placed.

FIG. 4 is an enlarged view of the guide shoe 18 and its vicinity in FIG. FIG.
As shown in the figure, the guide shoe 18 is provided on the first steel tubular body 1.
0, a sliding member 20 made of a Teflon-based material installed via a steel plate 19, and a S material installed on the second steel tubular body 14.
Stainless steel plate 2 made of US304 material
1, since the sliding member 20 and the stainless steel plate 21 are not fixed to each other but are merely in contact with each other, so that slippage can occur between them. As is clear from the figure, the guide shoe 18
Is configured to allow relative displacement in the axial direction of the first and second steel tubular bodies 10 and 14 and to regulate relative displacement in a direction intersecting these axial directions.

The above is the main configuration of the present embodiment. Next, the function of the present embodiment will be described. When vibration occurs in the frame 1 constituting the building due to an earthquake, wind, or the like, the vibration also occurs in the damper unit 7 via the end component 6 fixed to the frame 1. At this time, a bending moment acts on the damper portion 7 in addition to the axial force. However, since the guide shoes 18 restrict the relative displacement of the brace components 8 and 9 in directions other than the axial direction, the brace components 8 and 9 are restricted. Without bending deformation
Vibrates with relative displacement in the axial direction.

As the brace members 8 and 9 vibrate in the axial direction, the viscoelastic body 17 interposed between the first and second steel tubular bodies 10 and 14 vibrates while being sheared and deformed. Absorb energy. As a result, the viscoelastic body 17 absorbs the vibration energy in the frame 1 connected via the brace components 8 and 9 and the end components 6.

As described above, in the present embodiment, the vibration damping structure is obtained by interposing the viscoelastic body on the brace 5 provided in the frame 1 of the building.
Therefore, its appearance is the same as that of a brace found in a general steel structure including a joint. For this reason, compared to the conventional vibration damping structure, the installation location is not particularly limited, and there is no need to use other devices and structures to efficiently absorb vibration. It can be carried out. Because of this, when installing this inside a building, not only there are no special restrictions on structural planning and architectural planning, but also in this embodiment, the same design work as conventional seismic design The building's vibration control structure can be included in the plan.

The vibration damping structure for a building according to the present embodiment is installed inside the building as a brace 5, and a damper 7 is provided between the end member 6 and a splice plate 11 and a high-strength bolt. 12, the damper portion 7 can be easily replaced. Therefore, if a more effective damper material is developed in the future, not only can it be replaced with a new damper, but also the damper part 7 can be replaced.
Can be replaced with another member to adjust the vibration damping characteristics and horizontal strength of the entire building. For example, when it is desired to increase the horizontal strength of a building, the damper part 7 may be replaced with a general steel material, and the damper part 7 is replaced with a member made of extremely mild steel (extremely low yield point steel). By doing so, a steel damper expected for hysteresis damping can be obtained. Further, since the vibration damping structure of the building according to the present embodiment is installed inside the building as the brace 5, it can be easily used even when performing seismic reinforcement of an existing building.

Further, in the present embodiment, since the viscoelastic body 17 is used as a damper, periodic inspection is not required unlike an oil damper, and vibration is applied to a building such as a steel damper. Does not deform and need to be replaced. Therefore, the vibration damping structure of the building according to the present embodiment can be basically maintenance-free. Furthermore, since the viscoelastic body 17 is used as a damper, it is possible to provide a vibration damping structure that is effective for small and medium-sized earthquakes and wind loads.
It is possible to improve the livability of the building.

Further, since the viscoelastic body 17 has viscosity and elastic rigidity, it can apply a restoring force to the frame 1 even when the frame 1 is vibrated by an earthquake or the like. Even after an earthquake, residual deformation hardly remains in the frame 1. For this reason, by applying this embodiment to a building, it is possible to prevent residual deformation after the earthquake harmful to the building and maintain the function of the building even after the earthquake.

In the present embodiment, since there is no movable part such as a pin other than the damper part 7 and a simple mechanism with little energy loss is employed, the frame 1
Is efficiently transmitted to the viscoelastic body 17, and a good vibration damping effect can be exhibited.

Further, in the present embodiment, since the damper portion 7 is configured as described above, it is possible to integrally manufacture and transport this portion in a factory, and to install a damper on site. Do not need.
Therefore, it is advantageous in terms of the process as compared with other vibration damping structures, and has no demerits in terms of the construction period or temporary construction even when compared with a brace structure using a normal steel frame.

Further, in the present embodiment, guide shoes 18 are provided at the ends of the overlap regions 16 of the brace components 8 and 9, whereby the viscoelastic body 17 is subjected to compression, tension and torsional deformation. It is possible to cause only shear deformation without adding any other factors, and this allows the viscoelastic body 17 to effectively exhibit its function.

As described above, the vibration damping structure for a building according to the present embodiment can effectively attenuate vibrations in the building. Therefore, it is possible to reduce the cross section of the structural material as compared with a normal steel frame structure, and as a result, it is possible to contribute to the cost reduction of a building.

In the above, an example of the embodiment of the present invention has been described. However, the present invention is not necessarily limited to the above-described embodiment, and is applicable to a required vibration damping function and a required shape of a building. Thus, it is possible to change the material, shape, installation form, and the like. For example, in the above embodiment, rubber asphalt is used as the material of the viscoelastic body 17, but high damping rubber or the like may be used instead.

Further, the shapes of the first and second steel tubular bodies 10 and 14 in the above embodiment may be changed as shown in FIG. FIG. 6 (a) shows a modification of the cross-sectional shape of the damper portion 7 shown in FIG. 2, and the first steel tubular body 10 is formed by combining a pair of steel plates 22 and a pair of channel steels 23 with high strength bolts 24. It is formed by fastening using. In forming the damper portion 7, as shown in FIG. 6B, a second steel tubular body 14 made of a square steel pipe is arranged on a viscoelastic sheet 25, and then the second steel tubular body 14 is formed. Steel tubular body 14
Is rolled on the viscoelastic sheet 25 in the direction indicated by the arrow, so that the viscoelastic sheet 25 is wound around the outer surface of the second steel tubular body 14, and the channel steel 23 is pressed from the side thereof, Further, a steel plate 22 is arranged, and
3 and the steel plate 22 may be joined and integrated with the high-strength bolt 24.

Further, the shapes of the brace components 8, 9 themselves can be modified as shown in FIG. FIG. 7 shows FIG.
Similarly to (a), an example in which the shape of the damper portion 7 is changed from the above-described embodiment is shown. In this case, at least a part of the brace constituent material 8 is a steel material having a cross-shaped cross section. 26, the brace component 9
Is a steel plate 2 at least a part of which is made of four sets of L-shaped steel.
7 formed. Further, the viscoelastic body 17 is arranged between them. Damper part 7 as shown in FIG.
Is formed by attaching a viscoelastic body 17 to the outer surface of a steel material 26, applying a steel plate 27 from the outside thereof, and fixing the steel plate 27 using a tie plate 28 to fix them.
May be connected to each other.

As described above, the viscoelastic body 1 according to the above embodiment is described.
Although the modified example of the material 7 and the shape of the damper part 7 was shown, the vibration damping structure of the building of the present invention is not only installed as shown in FIG. 5, but also the shape of the building and the required vibration damping. According to the function or the like, it may be installed in the opening 4 formed by the pillar 2 and the beam 3 inside the building as shown in FIG.
8A shows the brace 5 shown in FIG.
(K), but also (b) (no type), (c) (eccentric no type), (d)
The brace 5 may be installed as in (eccentric K type). (E) shows that the brace 5 is connected to the truss structure 29.
This shows an example in the case of using as a lattice material, and it is also possible to suppress vibration of a large span structure by doing in this way.

The structure of the guide shoe 18 does not necessarily have to be as shown in FIG. 4, but a bearing shoe 30 may be used as shown in FIG. In this case, the bearing shoe 30 is welded to the brace component 9, and there is no need to process the brace component 8.

[0037]

As described above, the vibration damping structure for a building according to the first aspect has a structure in which a brace having a viscoelastic body interposed is arranged inside the building, and therefore, a conventional general vibration damping structure is used. It can be constructed with the same appearance and form as a building. Therefore, there are no special restrictions on structural planning and architectural planning, and compared to conventional vibration control structures, installation locations are limited and other devices and equipment are required to efficiently absorb vibration.
There is no need to use a structure, and installation can be performed easily. Also, in the same design work as the conventional seismic design,
The vibration damping structure of the building of the present invention can be included in a plan. In addition, the present invention can be easily used when reinforcing an existing building with earthquake resistance. Also,
The vibration damping structure of this building has a structure in which a viscoelastic body is interposed between the brace components fixed to the frame, so if a more effective damper material is developed in the future, These can be easily exchanged for those utilizing new materials. Furthermore, since a viscoelastic body is used as a damper, it can be basically maintenance-free, and is effective against small and medium-sized earthquakes and wind loads. Improvement can be achieved. In addition, since the viscoelastic body has elasticity and rigidity as well as viscosity, it can apply a restoring force to the frame even when vibration occurs in the frame due to an earthquake or the like. By applying to an object, it is possible to prevent residual deformation after the earthquake, which is harmful to the building, and to maintain the function of the building even after the earthquake.

According to the vibration damping structure for a building according to the second and third aspects, a simple mechanism having almost no energy loss other than the joint between the viscoelastic body and the brace component is employed. Vibrations in the frame are efficiently transmitted to the viscoelastic body, so that the invention according to claim 1 can be favorably implemented. Furthermore, in these inventions,
The viscoelastic body and the brace components can be integrated and manufactured and transported in the factory, eliminating the need for on-site damper installation work, which is advantageous in terms of process compared to other vibration damping structures. In addition, even when compared with a brace structure using a normal steel frame, there can be no disadvantage in terms of construction period and temporary construction.

According to the vibration damping structure for a building according to the fourth aspect, since the guide shoe is provided at the end of the overlap region of the brace component, compression, tension, torsion deformation, and the like are applied to the viscoelastic body. Instead, it is possible to cause only shear deformation, whereby the invention according to claim 2 or 3 can effectively exhibit its function.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a main part of a brace component and a viscoelastic body, schematically showing an embodiment of the present invention.

FIG. 2 is an axial sectional view of a brace component and a viscoelastic body shown in FIG. 1;

FIG. 3 is an axial sectional view of a brace component and a viscoelastic body shown in FIG. 1;

FIG. 4 is an enlarged side sectional view showing a guide shoe installed between the brace components shown in FIG. 1 and a situation in the vicinity thereof;

FIG. 5 is a diagram showing an appearance of a vibration damping structure of a building according to the present invention.

FIG. 6 is a view showing another embodiment of the brace constituent material and the viscoelastic body according to the present invention, which is different from that shown in FIGS. 1 and 2, (a) is a cross-sectional view thereof, and (b). FIG. 3 is a diagram showing a manufacturing method thereof.

FIG. 7 is a cross-sectional view showing another embodiment of the brace constituent material and the viscoelastic body according to the present invention which is different from those shown in FIGS. 1, 2 and 6;

FIG. 8 is a diagram showing an example of an installation form of a building vibration damping structure of the present invention.

FIG. 9 is a view showing another embodiment of the guide shoe according to the present invention which is different from that shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Column 3 Beam 4 Opening 5 Brace 8, 9 Brace constituent material 10 First steel tubular body 14 Second steel tubular body 17 Viscoelastic body 18 Guide shoe 26 Steel material 27 Steel plate

Claims (4)

[Claims] A brace is installed in an opening surrounded by left and right columns and upper and lower beams in a frame of a building composed of columns and beams, and the brace is made of a structural material composed of columns or beams. A building comprising: one brace component fixed to one side; the other brace component; and a viscoelastic body interposed between these brace components. Vibration control structure for objects. 2. The vibration damping structure for a building according to claim 1, wherein said one brace component is made of a first steel tubular body having a rectangular cross section, and said other brace component is: It consists of a second steel tubular body having a rectangular cross section inserted into the first steel tubular body, wherein the viscoelastic body has an outer surface of the one brace component and an inner surface of the other brace component. A vibration control structure for buildings, which is interposed between them. 3. The damping structure for a building according to claim 1, wherein said one brace component is made of a steel material having a cross-shaped cross section, and said other brace component is said one brace component. A vibration damping structure for a building, comprising a steel plate disposed opposite to an outer surface of the brace, wherein the viscoelastic body is interposed between the one brace constituent material and the other brace constituent material. . 4. The vibration damping structure for a building according to claim 2, wherein one end of an overlap region between the one brace component and the other brace component is provided at one end. Between the brace component and the other brace component, allowing the relative displacement of the one brace component and the other brace component in the axial direction, and restricting the relative displacement in the direction crossing the axial direction. A vibration damping structure for buildings, which is provided with a guide shoe.