JPH10159379A - Vibration control structure of building, and vibration damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control structure and a vibration damper capable of obtaining the excellent damping performance without impairing the space or without any additional labor, and rapidly performing restoration after generation of an earthquake. SOLUTION: A brace damper 6 is built in a brace of a skeleton of frame structure, and in the brace damper 6, an intermediate plate 11 joined with the skeleton through an end member 5B on the other end side, and an external plate 12 integrated with an inner steel tube 10 through a gusset plate and a joining plate 17 are successively laminated on the outer side of the inner steel tube 10 joined with the skeleton through an end member 5A on one end side. Viscoelastic material 14 is interposed between the inner steel tube 10, the intermediate plate 11 and the external plate 12.

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 and a vibration damper for a building suitable for use in a building or the like.

[0002]

2. Description of the Related Art As is well known, in recent years, buildings such as buildings have been required to have high seismic resistance. Therefore, various devices and structures for obtaining vibration damping performance and seismic isolation performance have been developed. Developed and put into practical use.

[0003] Among these, in particular, a vibration damper is to be incorporated into a wall of a skeleton, a part of a column or a beam, or a roof or a foundation to absorb vibration energy input to the skeleton due to an earthquake or a strong wind. Numerous vibration damping structures for buildings have been proposed.

[0004]

However, the above-mentioned conventional vibration damping structure and damping damper for a building have the following problems. First, most of the conventional vibration dampers are installed inside and outside the building as described above, and a space is required to incorporate them, which is restricted when designing the building, In addition, there is also a problem that it takes extra time to incorporate a vibration damping / isolation device at the time of construction. Furthermore, after a large earthquake or the like has occurred and the damping effect has been exerted, some of the damping dampers may be deformed or deteriorated. It is necessary to replace part or all of the vibration damper. However, depending on the location where the vibration damper is to be incorporated, replacement may be very difficult or impossible, and the building may not be able to be used immediately after an earthquake.

The present invention has been made in view of the above points, and can achieve high vibration damping performance without sacrificing space and without extra work during construction. It is another object of the present invention to provide a building damping structure and a damping damper that can be quickly restored after an earthquake.

[0006]

The invention according to claim 1 is
An obliquely extending brace damper is installed between columns adjacent to each other and beams positioned above and below each other in a skeleton of a building composed of columns and beams, and the brace damper is provided at one end side. Along the first component fixed to the skeleton at the other end side of the second component fixed to the skeleton
And a third component integrally connected to the first component.
Are alternately laminated over at least one layer, and are opposed to each other between the first component and the second component, and between the second component and the third component.
It is characterized in that a damping member for damping the relative displacement in the direction along each of the surfaces is interposed between the constituent members.

According to a second aspect of the present invention, in the vibration damping structure for a building according to the first aspect, the first component is made of a steel pipe having a rectangular shape in cross section, and the second component and the third component are formed of a steel pipe. Is disposed on each surface of the first component made of the steel pipe.

The invention according to claim 3 is the invention according to claim 1 or 2
In the vibration damping structure for a building described above, the damping member is a viscoelastic body.

According to a fourth aspect of the present invention, there is provided a vibration damper incorporated as a member constituting a frame, wherein a first component fixed to the frame at one end side is attached to the other end side. A second component fixed to the frame at
And a third component integrally connected to the component is alternately laminated over at least one or more layers, and between the first component and the second component facing each other,
And between the second component and the third component,
It is characterized in that damping members for damping the relative displacement in the directions along the surfaces are interposed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First and second embodiments of a vibration damping structure for a building and a vibration damper according to the present invention will be described below with reference to FIGS.

[First Embodiment] FIG.
Reference numeral 1 denotes a part of a building such as a building having a ramen structure, and reference numeral 1 denotes a building (frame) of a building to which the damping structure and damping damper of the building according to the present invention are applied;
Columns 3 made of steel, reinforced concrete, filled steel pipe concrete, etc., and 3 is a steel beam made of H-shaped steel erected between columns 2, 2 adjacent to each other.
Indicates a so-called K-shaped brace between the center of the upper beam 3 and the joint of the lower beam 3 and the column 2.

Each brace 4 is formed at its both ends by end members 5A and 5B made of H-shaped steel fixed to the frame 1, and attenuates the axial displacement of the brace 4 between the end members 5A and 5B. The brace damper 6 for performing the operation is incorporated.

[0013] As shown in FIG.
Is composed of a damper body (vibration damper) 7 and joint members 8A and 8B for connecting the damper body 7 to end members 5A and 5B on both sides thereof.

As shown in FIGS. 2 to 4, an inner steel pipe (first structural member, steel pipe) 10 having a rectangular shape in cross section is disposed at the innermost side of the damper body 7, and each side face thereof is provided. , An intermediate plate made of a strip-shaped steel plate (second component)
11, an outer plate (third component) 12 is sequentially stacked from the inside to the outside. And internal steel pipe 1
0 and the intermediate plate 11, and the intermediate plate 11
A viscoelastic body (damping member) 14 is interposed between the outer plate 12 and the outer plate 12.

The viscoelastic body 14 has a rubber asphalt rubber, a high damping rubber, a superplastic rubber (both a plastic property of absorbing energy and converting it to heat and a rubber elasticity providing a followability to a large deformation. Materials having high damping performance, such as a specially prepared polymer composite material (for example, manufactured by Bridgestone Corporation) are used.

As shown in FIGS. 3 and 4 (a), each corner of the internal steel pipe 10 has an angle of 45.degree. The gusset plate 16 which extends radially is provided integrally by fillet welding. In addition, the outer plate 12 is integrally provided with joining plates 17 at positions corresponding to the gusset plates 16 on both sides thereof at an angle corresponding to the gusset plates 16. Then, each gusset plate 16 and the joining plate 1 of the two outer plates 12 and 12 adjacent to each other with the gusset plate 16 interposed therebetween.
7 and 17 are integrally joined by a high-strength bolt (so-called HTB) 18. Thereby, the inner steel pipe 10
, And the outer plates 12, 12,... Along the four side surfaces are integrally joined.

As shown in FIGS. 3 and 4 (b), on both sides of each of the intermediate plates 11 arranged on the four side surfaces of the internal steel pipe 10, at predetermined intervals in the length direction thereof, The joining plate 19 is integrally provided by fillet welding so as to form an angle of 45 degrees with the intermediate plate 11. Then, the intermediate plates 1 adjacent to each other
The joining plates 19, 19 are integrally joined together by high-strength bolts 20. This gives 4
The intermediate plates 11, 11,... Are integrally formed in a box shape having a rectangular shape in cross section as a whole. In addition,
As shown in FIG. 2 and FIG.
9 is provided at a position that does not interfere with the gusset plate 16 of the internal steel pipe 10 and the joining plate 17 of the external plate 12.

As shown in FIG. 2, each of the intermediate plates 11 is provided so as to protrude toward the joint member 8B from the inner steel pipe 10 by a predetermined dimension.

Such a damper main body 7 is provided on the inner steel pipe 1.
0, the intermediate plate 11, and the outer plate 12 are each made of a steel material, and thus have the same form as the laminated rubber in which the steel material and the viscoelastic body 14 are alternately laminated. The damper body 7 includes the inner steel pipe 10 and the intermediate plate 1.
1, internal steel pipe 10 and external plate 12 integrated by viscoelastic body 14 interposed between external plates 12
In this configuration, the relative displacement in the axial direction with respect to the intermediate plate 11 is attenuated to exhibit a damper effect.

The damper body 7 is joined to the end members 5A, 5B via the joint members 8A, 8B. As shown in FIG. 5, the joint member 8A is made of, for example, an H-shaped steel material, and gusset plates 22, 22 extending radially at both ends are provided on the flanges 21, 21 by fillet welding. These gusset plates 22
Are the gusset plates 16, 16, ... of the internal steel pipe 10.
(See FIG. 4A). Then, as shown in FIG. 2, the flange 21 of the joint member 8A and the gusset plate 22 are butt-welded to the internal steel pipe 10 of the damper body 7 and the gusset plate 16 (see FIG. 4A). On the other hand, the joint member 8B has the same shape as the joint member 8A, and is formed by each flange 23 and a gusset plate 24 which is fillet welded to the flange 23. Each gusset plate 24 extends toward the damper body 7 and is sandwiched between the joining plates 19, 19. The joint member 8B is connected to each of the flanges 23 and the two intermediate plates 1 of the damper body 7 facing each other.
1 and 11 are butt-welded, and each gusset plate 24 is sandwiched between the joining plates 19 and 19 and joined by high-strength bolts 20. These joint members 8A and 8B are joined to end members 5A and 5B by joint plates 25 and 26 and high-strength bolts 27, respectively.

As a result, the damper body 7 is provided at one end side with the inner steel pipe 10 having the outer plate 12 integrated therewith.
Are joined to the end member 5A via the joint member 8A,
On the other end side, the intermediate plate 11 is
It is configured to be joined to the end member 5B via B.

As shown in FIG. 1, in a building 1 of a building in which the brace damper 6 having the above structure is incorporated, an external force (vibration) is input to the building 1 due to an earthquake, a strong wind, or the like. When the compressive or tensile force in the axial direction acts on the brace 4 due to the deformation of 1, the force causes a relative displacement in a direction in which the end members 5A and 5B approach or separate from each other. As a result, in the damper body 7 of the brace damper 6 shown in FIG. 2, the inner steel pipe 10, the outer plate 12 integrated therewith, and the intermediate plate 11 are relatively displaced in the axial direction, and the viscoelasticity is accordingly increased. The relative displacement is attenuated by absorbing the displacement energy while the bodies 14, 14 undergo shear deformation. In this way, the vibration of the frame 1 is damped by the brace damper 6.

In the above-described vibration damping structure for a building, the brace damper 6 is incorporated into the frame 1 having the ramen structure, and the brace damper 6 is joined to the frame 1 at one end via the end member 5A. On the outside of the inner steel pipe 10, an intermediate plate 11 joined to the skeleton 1 at the other end via the end member 5B, and an outer plate integrated with the inner steel pipe 10 via a gusset plate 16 and a joining plate 17 12 are sequentially laminated, and a viscoelastic body 14 is interposed between the inner steel pipe 10, the intermediate plate 11, and the outer plate 12, respectively. Such a brace damper 6 can attenuate a displacement or a vibration generated in the skeleton 1 due to an earthquake, a wind, or the like, and enhance the vibration damping performance of the skeleton 1. Furthermore, since the response at the time of an earthquake becomes small by improving the damping performance of the skeleton 1, it becomes possible to reduce the cross section of the members constituting the skeleton 1 as compared with a normal steel structure, thereby contributing to cost reduction. be able to.

At this time, the viscoelastic body 14 is provided between the inner steel pipe 10 and the intermediate plate 11 and between the intermediate plate 11 and the outer plate 12 in the brace damper 6.
Since the structure is provided in a single layer, the damping performance can be doubled without increasing the size of the brace damper 6 as compared with the case where the single layer is used.

Also, the brace damper 6 can be manufactured at a factory and does not require an on-site assembling operation.
When the skeleton 1 is constructed, the skeleton 1 can be assembled in the same process as that of a normal steel frame brace, and the skeleton 1 having high vibration damping performance can be constructed without increasing labor and prolonging the construction period.

Further, the appearance of the frame 1 incorporating the brace damper 6 is the same as that of a commonly used brace structure, and can be easily applied without any particular restrictions on a structural plan or an architectural plan. This structure can be applied.

In addition, since the brace damper 6 is bolted to the frame 1 via the end members 5A and 5B, the brace damper 6 can be easily replaced. When maintenance is performed, the damper body 7 is replaced when a large earthquake occurs. When it becomes necessary to do so, or when a damping material having a higher damping effect is developed in the future, the replacement operation can be performed easily and quickly. In particular, recovery can be performed promptly after a major earthquake occurs. Moreover, the high-strength bolt 27 is used for the bolt connection.
Was used. Since the high-strength bolt 27 has good workability and easy quality control, the above-mentioned effect is more remarkable.

The damper body 7 includes a viscoelastic body 14 as a damping member for damping vibration. The viscoelastic body 14 retains elasticity and rigidity together with viscosity, and residual deformation during an earthquake response is sufficiently smaller than the maximum deformation. Therefore, even after the occurrence of an earthquake, the function can be maintained without leaving harmful residual deformation in the frame 1. In addition, by using the viscoelastic body 14, the vibration damping performance can be effectively exerted even under a slight deformation or wind load, and the livability can be improved.

The damper body 7 itself using the viscoelastic body 14 has substantially the same structure as a conventional laminated rubber, and does not require a special technique for assembly, and can be manufactured in a short period of time. It can be performed at low cost. Also, the damper body 7 using the viscoelastic body 14 is basically maintenance-free unlike an oil damper that requires periodic inspection, and the assembly of the damper body 7 is performed by bolting with high-strength bolts 18 and 20. Thus, even when maintenance is required, this can be easily performed.

Further, the brace damper 6 has a structure in which not only the inner steel pipe 10 having a rectangular shape in cross section but also the intermediate plate 11 and the outer plate 12 are assembled in a rectangular shape in cross section. Since the brace damper 6 has a box-shaped closed cross section as a whole, resistance to buckling can be increased.

[Second Embodiment] Next, a second embodiment of a vibration damping structure and a damping damper for a building according to the present invention will be described. In the second embodiment described below, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The vibration damping structure and the vibration damper of the building according to the second embodiment are such that a damper body (vibration damper) 30 of a brace damper 6 'described later is replaced with the damper body 7 shown in FIG. The end members 5A, 5B and the joint members 8A, 8
The configuration of incorporating via B is common.

As shown in FIG. 6, the damper body 30
An inner steel pipe 10 having a U-shaped cross section is disposed on the innermost side, and an intermediate plate (second component) 31 and an outer plate (third component) made of a strip-shaped steel plate are provided on each side surface thereof. ) 32 are sequentially stacked from the inside to the outside. And, between the internal steel pipe 10 and the intermediate plate 31,
The viscoelastic body 14 is interposed between the intermediate plate 31 and the outer plate 32, respectively.

As shown in FIG. 6 and FIG.
A cylindrical separator 34 of a predetermined length is provided between the outer plate 32 and each of the outer plates 32 at predetermined intervals in the length direction. This separator 34 is used for the inner steel pipe 10.
And the external plate 32 is maintained at a predetermined interval. A bolt 35 is inserted into each separator 34, and the inner steel pipe 10 and the outer plate 32 are integrally connected by the bolt 35. On the other hand, as shown in FIG.
A slot 36 having a predetermined length in the length direction of the damper body 30 is formed at a position corresponding to the intermediate plate 3.
1 and the inner steel pipe 10 and the outer plate 32 move relative to each other,
It is allowed to move in the axial direction.

In the brace damper 6 'provided with such a damper body 30, the inner steel pipe 1 is provided similarly to the damper body 7 shown in FIG. 2 in the first embodiment.
0 is joined to the end member 5A side, and the intermediate plate 31 is joined to the end member 5B side similarly to the intermediate plate 11.

By incorporating the brace damper 6 'having the above-described damper main body 30 into the frame 1 instead of the brace damper 6 shown in FIG. 1, the same effect as in the first embodiment can be obtained. Becomes

In the first and second embodiments, the viscoelastic body 14 is used for the damper bodies 7, 30. However, any material can be used as long as it is a damping member having high damping performance. Is also good. The internal steel pipe 10
The use of damping steel plates for the intermediate plates 11, 31 and the outer plates 12, 32 can further enhance the damping performance. In addition, although the viscoelastic body 14 is provided in the damper bodies 7 and 30 in two layers, the damper bodies 7 and 30 may be configured to have two or more viscoelastic bodies, so that the damping performance can be further improved. . In that case,
The component disposed outside the outer plates 12 and 32, which is the third component, is a second component integrally connected to the intermediate plates 11 and 31, and thereafter the third component and the second component are used. And materials are arranged alternately.

In addition to these, while allowing relative displacement in the axial direction between the inner steel pipe 10 and the intermediate plates 11 and 31 and between the intermediate plates 11 and 31 and the outer plates 12 and 32, A guide shoe for maintaining the distance between the guide shoes may be provided. For example, a guide shoe made of, for example, Teflon (registered trademark) is attached to either one of the inner steel pipe 10 and the intermediate plates 11, 31 and the intermediate plate 11, 31, and the outer plates 12, 32. , And make contact with the other side. The guide shoe is slid when the inner steel pipe 10 and the intermediate plates 11, 31 and the intermediate plates 11, 31, and the outer plates 12, 32 relatively move in the axial direction. As a result, compression, tension, torsion and the like are applied to the viscoelastic body 14 interposed between the inner steel pipe 10 and the intermediate plates 11 and 31 and between the intermediate plates 11 and 31 and the outer plates 12 and 32, respectively. This can be prevented from occurring, and only the shear deformation can be caused to effectively exert the damping function.

Further, in the first and second embodiments described above, the brace dampers 6, 6 'are arranged in a K-shaped brace installation form. It may be provided in another brace installation form such as an eccentric K type. Further, the damper bodies 7, 30 are configured to be incorporated in the frame 1 having the rigid frame structure. However, such damper bodies 7, 30 are members that effectively attenuate the displacement in the axial direction. It is also possible to incorporate it as a lattice material of a truss frame (frame) or as a member constituting various types of frames, thereby improving the vibration damping performance of various frames.

[0040]

As described above, according to the vibration damping structure for a building according to the first aspect, the brace damper is installed between the pillar and the beam of the skeleton, and the brace damper is provided at one end. A first component fixed to the skeleton at the other end, a second component fixed to the skeleton at the other end, and a third component integrated with the first component, At least one or more layers are alternately stacked, and a damping member is interposed between the first component, the second component, and the third component. With such a brace damper, it is possible to attenuate displacements and vibrations that occur in the skeleton due to an earthquake, wind, or the like, and to improve the vibration control performance of the skeleton. Furthermore, since the response during an earthquake is reduced by improving the vibration control performance of the skeleton, it is possible to reduce the cross section of the members constituting the skeleton compared to a normal steel structure, which can contribute to cost reduction. . In addition, since the brace damper has a configuration in which a plurality of layers of damping members are provided, the damping performance is dramatically improved without increasing the size of the brace damper as compared with a case where the brace damper is a single layer. be able to. Furthermore, since such a brace damper can be manufactured in a factory, there is no need for on-site assembling work, and when building a skeleton, it can be incorporated in the same process as a normal steel frame brace, increasing labor and It is possible to construct a skeleton having high vibration damping performance without prolonging the construction period. In addition, the appearance of the frame incorporating the brace damper is the same as the commonly used brace structure, and this structure can be easily applied without any special restrictions on the structural plan and architectural plan. can do.

According to the vibration damping structure for a building according to the second aspect, the first component is made of a steel pipe having a rectangular shape in cross section.
And the third component are disposed on each surface of the first component. As a result, the brace damper has a box-shaped closed cross section as a whole, and the brace material can have a large resistance to buckling.

According to the vibration damping structure for a building according to the third aspect, the damping member is made of a viscoelastic body. As a result, even after the occurrence of an earthquake, the function can be maintained without leaving harmful residual deformation in the frame. Further, by using the viscoelastic body, it is possible to effectively exhibit the vibration damping performance even under a small deformation or wind load, and it is possible to improve the comfort. Further, the brace damper itself has substantially the same structure as the conventional laminated rubber, and no special technique is required for assembling, so that it can be manufactured in a short construction period and at low cost. In addition, maintenance can be facilitated.

According to the vibration damper of the fourth aspect, the first component fixed to the frame at one end and the second component fixed to the frame at the other end are provided. , And a third component integrated with the first component are alternately laminated at least over at least one layer, and between the first component and the second component facing each other, and the second component. The damping member is interposed between the component and the third component. By incorporating such a damping damper as a brace of a ramen structure or as a lattice material of a truss frame, the vibration damping performance of the frame can be enhanced, and the cross section of the frame constituting the frame can be reduced compared to a normal steel structure. It is possible to reduce the size, which can contribute to cost reduction. In addition, since such a vibration damper can be manufactured in a factory, a frame having high vibration damping performance can be constructed without increasing labor on site or prolonging the construction period.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing an example of a building to which a damping structure and a damping damper of a building according to the present invention are applied.

FIG. 2 is a diagram showing an appearance of the vibration damper and a cross section of a part thereof.

FIG. 3 is a perspective view showing a damper body of the vibration damper.

FIGS. 4A and 4B are cross-sectional views in FIG. 2, wherein FIG.

FIG. 5 is a view showing a joint member constituting the vibration damper, and is a cross-sectional view in a direction orthogonal to the axis thereof.

FIG. 6 is a view showing another example of the vibration damper according to the present invention, and is a cross-sectional view in a direction orthogonal to an axis of the vibration damper.

FIG. 7 is a sectional view showing a part of the vibration damper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame (frame) 2 Column 3 Beam 6, 6 'Brace damper 7, 30 Damper main body (damping damper) 10 Internal steel pipe (1st component, steel pipe) 11, 31 Intermediate plate (2nd component) 12 , 32 External plate (third component) 14 Viscoelastic body (damping member)

Claims (4)

[Claims] Claims: 1. In a skeleton of a building comprising columns and beams, between columns adjacent to each other and beams positioned above and below each other,
A brace damper extending obliquely is provided, and the brace damper is fixed to the skeleton at the other end along the first component fixed to the skeleton at one end. The second component and the third component integrally connected to the first component are alternately laminated at least over at least one layer, and face the first component and the second component. Between the second component and the third component, and between the second component and the third component, a damping member that attenuates relative displacement in a direction along their surfaces is interposed. The building's vibration control structure is characterized by 2. The vibration damping structure for a building according to claim 1, wherein the first component is a steel pipe having a rectangular shape in cross section.
A vibration damping structure for a building, wherein the second component and the third component are provided on each surface of the first component made of the steel pipe. 3. The vibration damping structure for a building according to claim 1, wherein said damping member is a viscoelastic body. 4. A vibration damper incorporated as a member constituting a frame, wherein the damper is fixed to a first component fixed to the frame at one end side and fixed to the frame at the other end side. A second component and a third component integrally connected to the first component are alternately stacked over at least one or more layers, and the first component and the second component facing each other. And damping members for damping relative displacements in directions along their surfaces are interposed between the second component and the second component and the third component. A vibration damper characterized by: