JPH09177362A - Building damping structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance earthquake resistant properties even for an existing building by setting up the uppermost building skeleton of a building on a lower building skeleton so that it may move in the horizontal direction relatively and interposing a damping device between the upper most building skeleton and the lower building skeleton. SOLUTION: The upper most building skeleton A is adapted to move relatively on a lower building skeleton B in the horizontal direction where a damping device 25 is interposed between the uppermost building skeleton A and the lower building skeleton B. Therefore, the weight of the upper most building skeleton A acts as an anchor of TMD. When an earthquake is generated, the upper most building skeleton is resonated with the lower building skeleton B with a differential phase, thereby absorbing the vibration. Moreover, the relative displacement between the uppermost building skeleton A and the lower building skeleton B is damped with the damping device 25, thereby damping a building 1. In the case of damping between the uppermost building skeleton A and the existing building 1 integrated with the lower building skeleton, the upper end of each post 2 on the uppermost floor is cut down and the uppermost building skeleton A is lifted up, thereby interposing a sliding expansion bearing between the post 2 and the uppermost building skeleton A. A damping device 25 is interposed between a sub-frame 20 laid out on the outside surface of a core 5 and the uppermost building skeleton A, thereby lifting down the uppermost building skeleton A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building vibration damping structure suitable for use in enhancing seismic resistance regardless of whether a building such as a building is existing or new.

[0002]

2. Description of the Related Art Conventionally, there are various methods for improving the earthquake resistance of a building such as an existing building.

First, there is a method in which an existing building is reinforced to improve its proof strength, thereby increasing the earthquake resistance of the building. For this, for example, there is a method in which concrete is added to an existing wall to increase the thickness of the wall, or a wall is newly installed separately from the existing wall. In addition, by arranging a reinforcing unit made of steel between pillars and beams of an existing building, arranging a reinforcing frame made of steel along the pillars, or by assembling steel braces along the outer periphery of the building, There is also a method of attaching various reinforcing members to the building.

It is also conceivable to provide the building with a seismic isolation structure by providing a damping device such as so-called seismic isolation rubber without modifying the building itself.

[0005]

However, the conventional techniques for improving the seismic resistance of a building as described above have the following problems. First, it is difficult to apply the method of additionally striking a wall or constructing a new wall when a building needs a large space and has a small number of walls, such as an office building. In addition, there is a problem in that the interior space is narrowed and the usability is deteriorated by the method of additionally striking the wall or newly installing the method or the method of attaching the reinforcing unit and the frame made of the steel frame in the building. further,
In either method, when reinforcing the building, it is necessary to avoid interference with existing equipment, elevators, stairs, doorways, etc., and it may not be possible to reinforce the optimum location. In addition, when a reinforcing frame is assembled on the outer periphery of the building, the appearance of the building is impaired and the view from the inside of the building is obstructed.

On the other hand, in the method of providing a building with a seismic isolation structure by providing a damping device such as a seismic isolation rubber, the installation work of the damping device tends to be large-scale. Moreover, the provision of the damping device requires that the upper and lower edges of the damping device be trimmed so that the damping device can be displaced in the horizontal direction. For this reason, for example, elevator shafts, equipment pipes, etc. that are continuous in the vertical direction must be horizontally displaceable by cutting the upper and lower edges at the position where the damping device is installed, which is extremely difficult. It's difficult. In addition, in a building with a large aspect ratio (the ratio of the height to the width of the building), if the building vibrates in the horizontal direction, a large force acts in the direction in which the building itself collapses. Not only the pulling force but also the pulling force acts in the vertical direction, which may cause damage to the rubber. Therefore, there is also a problem that a damping device such as a base isolation rubber cannot be applied to a building having a large aspect ratio.

The present invention has been made in consideration of the above points, and it is possible to reliably improve the earthquake resistance of an existing building without impairing the usability, appearance, or view of the building. It is an object to provide a vibration control structure for a building that can.

[0008]

The invention according to claim 1 is
The uppermost frame of the building is edged from the lower frame of the building, and the uppermost frame is supported by the lower frame so as to be displaceable in the horizontal direction via an elastic support.

According to a second aspect of the present invention, in the vibration control structure for a building according to the first aspect, the uppermost skeleton and the lower skeleton are trimmed at the upper ends of the pillars forming the building. Is characterized by.

According to a third aspect of the present invention, in the vibration damping structure for a building according to the first aspect, the uppermost skeleton and the lower skeleton are trimmed by the leg portions of the pillars constituting the uppermost floor of the building. It is characterized by

According to a fourth aspect of the present invention, in the vibration control structure for a building according to the first aspect, the uppermost skeleton is formed on the beam, which is erected on the upper ends of the pillars forming the building. It is characterized by comprising a rooftop slab that is formed, and the uppermost skeleton and the lower skeleton are edge-cut by the upper end of the pillar and the outer end of the beam.

The invention according to claim 5 relates to claims 1 to 4.
In the vibration control structure for a building according to any one of the above, the lower body of the building is provided with a core section having a cylindrical cross section assembled so as to be continuous in the up-down direction, and the core section and the uppermost body. It is characterized in that the elastic support is interposed between the two.

The invention according to claim 6 is the invention according to claims 1 to 5
In the damping structure for a building according to any one of 1, the elastic support is provided with a damping mechanism that damps the displacement when the uppermost skeleton is displaced with respect to the lower skeleton due to an earthquake or the like. It is characterized by that.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION First to third embodiments of a building vibration damping structure according to the present invention will be described below with reference to FIGS.

[First Embodiment] First, an example in which the uppermost frame and the lower frame are cut off at the upper ends of the columns will be described.

In FIG. 1, reference numeral 1 is a building 1 having a rigid frame structure, 2 is a pillar constituting the building 1, 3 is a beam, and 4 is an outer wall. The building 1 is composed of a core portion 5 arranged in the center thereof and an outer peripheral portion 6 located on the outer peripheral side thereof.

The core portion 5 has a rectangular tubular cross section, and a brace material 8 is further installed between the pillars 2 and the beams 3 to provide a stronger structure than the outer peripheral portion 6. ing. The core portion 5 is constructed one floor higher than the outer peripheral portion 6, and an elevator shaft, stairs, and the like are provided therein.

The damping structure of the building 1 as described above has the following structure. The building 1 has a configuration in which an uppermost skeleton A and a lower skeleton B below the upper skeleton A are cut off.

The uppermost skeleton A is composed of beams 3A installed on the uppermost part of the outer peripheral portion 6, a roof slab 10 formed on these beams 3A, and a parapet 11 formed on the outer peripheral portion of the roof slab 10. It is composed of and, and has a square shape in plan view.

On the other hand, the lower skeleton B is composed of the outer peripheral portion 6 excluding the uppermost skeleton A and the core portion 5.
As shown in FIG. 2, at the upper end portion of the pillar 2 of the lower skeleton B, a ceiling receiving member 12 made of a steel frame extending horizontally between adjacent pillars 2 is installed. Receiving material 1
The ceiling 13 on the uppermost floor of the outer peripheral portion 6, ceiling lighting, and the like are attached to the lower surface of 2.

As a result, the uppermost frame A and the lower frame B are
Means that the upper ends of the pillars 2, 2, ... That constitute the outer peripheral portion 6 of the building 1 are edge-cut. The weight of the uppermost skeleton A is set to have a natural period equal to the natural period (first natural period) of the lower skeleton B.

As shown in FIG. 2, the upper end of each column 2 constituting the lower frame B and the lower surface of the uppermost frame A corresponding thereto are respectively provided as sliding bearings, for example, bearings and friction coefficients. A plate 14 made of low Teflon or stainless steel is attached. This allows
The uppermost skeleton A is configured to be horizontally displaceable on the lower skeleton B.

As shown in FIGS. 1 and 3, a subframe 20 is provided at a predetermined position on the outer peripheral surface of the core portion 5. As shown in FIG. 4, the sub-frame 20 includes support steel frames 21 and 21 extending in the horizontal direction, joists 22 and 22 installed between the support steel frames 21 and 21, and the support steel frames 21. , 21 and joists 22, 22, ..., and a reinforcing steel frame 24 provided between the tip end of each supporting steel frame 21 and the side surface of the core part 5.

A damping device (elastic support) 25 is interposed between the upper surface of the iron plate 23 of the sub-frame 20 and the lower surface of the beam 3A constituting the uppermost frame A. The damping device 25 is formed of steel plates 26 and 27 whose upper and lower surfaces are circular, respectively, and a high damping rubber (damping mechanism) 28 having elasticity and damping property is sandwiched between these plates 26 and 27. It has been configured. The upper plate 26 is fixed to the lower surface of the beam 3A of the uppermost frame A, and the lower plate 27 is fixed to the upper surface of the iron plate 23 of the subframe 20. As a result, the damping devices 25, 25, ... Are arranged between a predetermined position on the inner peripheral side of the uppermost skeleton A and the core portion 5 forming the lower skeleton B.

In this way, the building 1 has the uppermost frame A
Is provided on the lower frame B so as to be relatively movable in the horizontal direction,
Further, a damping device 2 is provided between the uppermost frame A and the lower frame B.
5, 25, ... Are interposed. And
The weight of the uppermost skeleton A is set to have a natural period equal to that of the lower skeleton B. In such a structure, when an external force in the horizontal direction acts and horizontal vibration occurs in the building 1 due to an earthquake or wind, the lower skeleton B and the uppermost skeleton A are cut off from each other. B and the uppermost frame A are relatively displaced. At this time, the uppermost skeleton A resonates with a phase difference with respect to the vibration of the lower skeleton B to generate a force in a direction opposite to the vibration of the lower skeleton B, which is transmitted to the lower skeleton B through the damping device 25. The vibration of the lower skeleton B is canceled by this force. That is, the building 1 is a tuned mass damper including the uppermost skeleton A and the damping device 25 on the lower skeleton B.
(Tuned Mass Damper; so-called TMD) is provided, and the uppermost skeleton A acts as a weight of TMD.

Here, the existing building 1, that is, the building 1 in which the uppermost skeleton A and the lower skeleton B are not cut off from each other
In order to obtain the vibration control structure for the building 1 having the above structure, first, the upper ends of the pillars 2 on the uppermost floor of the building 1 are cut to obtain the uppermost frame A.
And lower skeleton B are separated. Then, the uppermost skeleton A is lifted up by jacking it up, for example, a bearing, between the upper end of the column 2 and the lower surface of the uppermost skeleton A.
Alternatively, a sliding bearing such as the plate 14 is interposed. Further, a sub-frame 20 is provided on the outer surface of the core portion 5, and the damping device 2 is provided between the sub-frame 20 and the uppermost frame A.
5, 25, ... are inserted. Then, by lifting down the uppermost skeleton A, the vibration control structure of the building 1 having the above configuration can be realized.

In the damping structure of the building 1 described above, the building 1
Has a structure in which the uppermost skeleton A is provided on the lower skeleton B so as to be relatively movable in the horizontal direction, and further, the damping devices 25, 25, ... Are interposed between the uppermost skeleton A and the lower skeleton B. ing. As a result, the weight of the uppermost skeleton A, which is supported on the lower skeleton B so as to be horizontally displaceable, acts as, so to speak, the weight of the TMD, and when an earthquake occurs, the uppermost skeleton A and the lower skeleton B are positioned. Resonate with a phase difference to cancel the vibration,
The building 1 can be controlled. Moreover, the damping device 25
Since the relative displacement between the uppermost skeleton A and the lower skeleton B is attenuated by the above, the building 1 is quickly damped. Therefore, a decrease in usability due to the reduction of the indoor space, which has occurred by reinforcing the building frame by methods such as reinforcing walls as in the past and attaching steel reinforcing units and frames, etc. Moreover, it is possible to improve the earthquake resistance of the building without causing a problem of impairing the appearance, hindering the view, and interfering with the existing equipment, elevators, stairs, doorways, and the like.

Further, since only the uppermost frame A is displaceable in the horizontal direction, it is not necessary to divide vertically continuous parts in the lower frame B such as an elevator shaft and facility piping. In addition, even in a building with a large aspect ratio, the vertical damping force does not act on the high damping rubber 28 of the damping mechanism 25, so that it is not damaged.

Moreover, the damping structure of such a building 1 is
Since it can be easily applied to an old existing building having low earthquake resistance, the life of the building 1 can be extended and the added value of the building 1 can be improved. Moreover, since the work is performed only on the uppermost part of the building 1, the work period can be shortened and the cost can be suppressed, and the lower skeleton B can be used even during the work.

Further, the lower skeleton B of the building 1 is provided with a strong core portion 5, and a damping device 25 is interposed between the core portion 5 and the uppermost skeleton A. As a result, when the uppermost body A and the lower body B resonate, the force from the uppermost body A is transmitted to the lower body B through the damping device 25. Since it is provided in the strong core portion 5, it is possible to achieve the above-mentioned respective effects without particularly providing the core portion 5 with seismic reinforcement.

In addition, the damping device 25 is provided between the uppermost skeleton A and the core portion 5 of the lower skeleton B, and the uppermost skeleton A is provided.
And a sliding bearing such as a plate 14 is provided between the outer periphery 6 of the lower skeleton B and the upper end of each column 2. As a result, the horizontal displacement of the uppermost frame A is not transmitted to each of the cantilevered columns 2, so that no bending stress acts.

[Second Embodiment] Next, as an example of a second embodiment of the building vibration damping structure according to the present invention, the uppermost skeleton and the lower skeleton constitute the uppermost floor of the building. This will be described using an example in which the edge of the pillar is cut. Here, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 5, a building 1'consisting of a core portion 5 and an outer peripheral portion 6 has a structure in which an uppermost skeleton C and a lower skeleton D below it are trimmed.

The uppermost skeleton C is composed of beams 3C installed on the uppermost part of the outer peripheral portion 6, a roof slab 10 formed on these beams 3C, and a parapet 11 formed on the outer peripheral portion of the roof slab 10. And the pillar 2 that constitutes the top floor of the outer peripheral portion 6
C. The weight of the uppermost skeleton C is set to have a natural period equal to the natural period (primary natural period) of the lower skeleton D.

On the other hand, the lower skeleton D is composed of the outer peripheral portion 6 excluding the uppermost skeleton C and the core portion 5.

As a result, the uppermost frame C and the lower frame D are
And has a configuration in which the legs of the pillars 2, 2, ... on the uppermost floor of the outer peripheral portion 6 of the building 1'are trimmed.

Then, for example, bearings and a plate 14 made of Teflon or stainless steel are attached to the pillars 2C of the uppermost frame C and the corresponding upper surface of the outer peripheral portion 6 of the lower frame D as sliding bearings. As a result, the uppermost frame C is configured to be horizontally displaceable on the lower frame D.

As shown in FIGS. 3 and 4, the core portion 5
At predetermined positions on the outer peripheral surface of the subframe 20, 20, ...
Is provided, and the damping device 25 is interposed between each sub-frame 20 and the lower surface of the beam 3C that constitutes the uppermost frame C.

In this way, in the building 1 ', the uppermost frame C is provided on the lower frame D so as to be relatively movable in the horizontal direction, and the damping device 25 is provided between the uppermost frame C and the lower frame D. , 25, ... are interposed.

In the vibration control structure of the building 1'described above, as in the building 1 in the first embodiment, the weight of the uppermost skeleton C supported so as to be displaceable in the horizontal direction on the lower skeleton D is TMD. It acts as a weight, and when an earthquake or the like occurs, the uppermost skeleton C resonates with the lower skeleton D with a phase difference and cancels the vibration, and the building 1 ′ can be damped. Therefore, it is possible to obtain the same effect as that of the building 1 in the first embodiment.

[Third Embodiment] Next, as an example of the third embodiment of the vibration damping structure for a building according to the present invention, the uppermost skeleton and the lower skeleton are connected to the upper end of the pillar and the beam. This will be described using an example in which an edge is cut with the outer end portion of. Here, the same components as those of the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 6, a building 1 "consisting of a core portion 5 and an outer peripheral portion 6 has a structure in which an uppermost frame E and a lower frame F below it are trimmed.

The uppermost skeleton E is composed of a beam 3E installed on the uppermost portion of the outer peripheral portion 6 and a roof slab 10 formed on these beams 3E. This top frame E
Is set such that its weight has a natural period equal to the natural period (first-order natural period) of the lower frame F.

On the other hand, the lower skeleton F is composed of the outer peripheral portion 6 excluding the uppermost skeleton E and the core portion 5.

As shown in FIG. 7, both ends of the beam 3E and the roof slab 10 which constitute the uppermost frame E, and the inner peripheral side of the outer wall 4 of the lower frame F at a position opposed to the beam 3E and the roof slab 10 are respectively raised upward. The extending rising portions 31 and 32 are formed. Then, between the rising portions 31 and 32 facing each other and between the rising portion 31 and the core portion 5,
The waterproof covers 34 and 35 are covered to prevent water from entering from here.

As a result, the uppermost frame E and the lower frame F are
And the upper ends of the pillars 2, 2, ... Of the outer peripheral portion 6 of the building 1 ",
The outer edge of the uppermost beam 3E of the outer peripheral portion 6, that is, the inside of the outer wall 4, is edge-cut.

Then, as shown in FIG. 2, each beam 3E of the uppermost frame E and the outer peripheral portion 6 of the lower frame F corresponding thereto.
A bearing, a plate 14 made of Teflon, stainless steel, or the like is attached as a sliding bearing to the upper surface of the, so that the uppermost skeleton E can be horizontally displaced on the lower skeleton F. Has become.

As shown in FIG. 4, sub-frames 20, 20, ... Are provided at predetermined positions on the outer peripheral surface of the core portion 5, and each sub-frame 20 and the beam forming the uppermost frame E are provided. A damping device 25 is interposed between the lower surface of 3E and the lower surface of 3E.

In this way, in the building 1 ", the uppermost frame E is provided on the lower frame F so as to be relatively movable in the horizontal direction, and the damping device 25 is provided between the uppermost frame E and the lower frame F. , 25, ... are interposed.

In the vibration damping structure of the building 1 "described above, the uppermost skeleton supported on the lower skeleton F so as to be horizontally displaceable is similar to the buildings 1, 1'in the first and second embodiments. The weight of E acts as a weight of the TMD, and when an earthquake or the like occurs, the uppermost frame E resonates with the lower frame F with a phase difference to cancel the vibration and suppress the building 1 ″. Therefore, it is possible to obtain the same effect as that of the building 1 in the first embodiment.

In each of the above embodiments, the damping device 25 made of the high damping rubber 28 is interposed between the uppermost skeletons A, C and E and the lower skeletons B, D and F. Instead of this, a configuration may be adopted in which a damping damper having higher damping performance is provided. For example, as shown in FIG. 8 (a), the uppermost skeletons A, C, E and the lower skeletons B,
A vibration damper (vibration damping mechanism) 4 having a structure in which a viscoelastic body 40 and a steel plate 41 are laminated in a plurality of layers between D and F.
2 may be interposed. As shown in FIG. 8B, in such a vibration damper 42, when the uppermost frame bodies A, C, E and the lower frame bodies B, D, F are displaced relative to each other, the viscoelastic body 40 moves in the horizontal direction. However, at this time, the damper effect is exerted, whereby the relative displacement between the uppermost frame bodies A, C, E and the lower frame bodies B, D, F can be more effectively damped. Therefore, by adopting such a vibration damper 42 or the like, the effect in each of the above-described embodiments can be made more prominent. Of course, this can also be realized by using various dampers other than the vibration damper 42. Furthermore, if a damping steel plate is used instead of the steel plate 41, a higher damping effect can be exhibited. Further, various dampers such as a hybrid mass damper may be configured to be actively controlled according to the vibration of the building 1.

The damping device 25 is arranged so that the uppermost frame bodies A, C and E do not rotate on the lower frame bodies B, D and F.
Adjust its rigid position. Of course, regarding the installation position of the damping device 25, the subframe 20 and the beams 3A, 3
The location is not limited to the bottom surface of C, 3E, and may be another location.

Further, in each of the above-mentioned embodiments, the uppermost skeletons A, C and E are made to act as, so to speak, the weight bodies of the TMD. However, the weight of the uppermost skeletons A, C and E is lower than the lower skeleton B. , D, F is insufficient to suppress the vibration, weights may be placed on the uppermost skeletons A, C, E. In general, the weight of the TMD effectively exhibits its function if the weight of the TMD is 1% or more of the total weight of the building to be installed. Therefore, regarding the weight of the uppermost skeletons A, C, and E, 1 ',
It is preferable to set it to be 1% or more of 1 ″.

In addition, in order to make the uppermost skeletons A, C, E relatively movable on the lower skeletons B, D, F, for example, a bearing or a plate 14 made of a material having a low friction coefficient is used as a sliding bearing. However, other materials such as roller bearings may be used. In this case, it is preferable that the uppermost skeletons A, C, E are relatively movable on the lower skeletons B, D, F along at least two horizontal directions that are orthogonal to each other. However, when the buildings 1, 1 ', 1 "are substantially rectangular in plan view long in one direction, the uppermost skeletons A, C, and E are arranged along the shorter direction of the lower skeletons B, D, and F. It may be configured to be displaceable only in the direction.

It does not matter whether the buildings 1, 1 ', 1 "are existing or new. The structure is not limited to the example of the above-mentioned embodiment, for example, the core portion 5 is not provided. Other structures such as a normal ramen structure may be used.

[0056]

As described above, according to the vibration control structure for a building of claim 1, the uppermost frame of the building is trimmed from the lower frame so that it can be displaced in the horizontal direction through the elastic support. It is configured to support. Further, according to the vibration damping structure for a building of the second aspect, the uppermost frame and the lower frame are edge-cut at the upper ends of the pillars forming the building. Also,
According to the vibration damping structure for a building of claim 3, the uppermost frame and the lower frame are edge-cut by the leg portions of the pillars that form the uppermost floor of the building. Further, according to the vibration damping structure for a building according to claim 4, an uppermost skeleton including a beam and a roof slab installed on the upper end of the pillar of the building, and a lower skeleton are provided at the outer end of the beam. It is configured to cut edges. In the vibration control structure of the building having such a structure, the weight of the uppermost skeleton movably supported on the lower skeleton plays a role of the weight of the TMD, so to speak, when the earthquake occurs, the uppermost skeleton is It resonates with a phase difference with the lower frame, and by this, the vibration of the lower frame can be canceled and vibration can be suppressed. Therefore, there is a decrease in usability due to the narrowing of the indoor space, which has occurred with the method of reinforcing the frame of the conventional building, the appearance is impaired and the view is obstructed, and existing equipment, elevators, stairs, It is possible to improve the earthquake resistance of the building without causing a problem of interfering with the entrance and the like. Furthermore, since only the uppermost frame can be displaced in the horizontal direction, it is not necessary to divide vertically continuous parts such as an elevator shaft and facility piping. In addition, even in a building having a large aspect ratio (the ratio of the height to the width of the building), the vertical tensile force does not act on the rubber or the like of the damping mechanism, so that the damage does not occur. Moreover, such a vibration control structure of a building can be easily applied to an old existing building having low earthquake resistance, which can extend the life of the building and improve the added value of the building. . Moreover, since the work is performed only on the uppermost part of the building, the work period can be shortened and the cost can be reduced, and the lower-layer skeleton can be used even during the work.

According to the building vibration damping structure of claim 5,
The lower structure of the building is equipped with a core part that is continuous in the vertical direction,
An elastic support is interposed between the core and the uppermost frame. When the upper and lower skeletons resonate, the force from the uppermost skeleton is transmitted to the lower skeleton via the elastic support, and this elastic support is provided in the strong core part. Therefore, it is possible to achieve the above-mentioned effects without particularly providing the core portion with seismic reinforcement.

According to the damping structure for a building of claim 6,
The elastic support is equipped with a damping mechanism that damps the displacement of the uppermost skeleton with respect to the lower skeleton due to an earthquake or the like. As a result, the relative displacement between the uppermost frame and the lower frame can be more effectively damped,
The earthquake resistance of the building can be made higher.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing an example of a structure for damping a building according to the present invention.

FIG. 2 is an enlarged view of a portion where the uppermost frame and the lower frame of the building are trimmed.

FIG. 3 is a plan sectional view of the building.

FIG. 4 is a vertical sectional view and a plan sectional view showing a damping mechanism installed between the uppermost body and the lower body.

FIG. 5 is a vertical cross-sectional view showing another example of the structure for damping a building according to the present invention.

FIG. 6 is a vertical cross-sectional view showing still another example of the vibration damping structure for a building according to the present invention.

FIG. 7 is an enlarged view of a portion where the uppermost frame and the lower frame of the building are trimmed.

FIG. 8 is a vertical cross-sectional view showing another example of the damping mechanism installed between the uppermost skeleton and the lower skeleton in the vibration damping structure for a building according to the present invention.

[Explanation of symbols]

 1 Building 2, 2C Column 3A, 3C, 3E Beam 5 Core part 10 Roof slab 25 Damper (elastic support) 28 High damping rubber (damping mechanism) 42 Vibration damper (vibration damping mechanism) A, C, E Top Body B, D, F Lower body

Claims (6)

[Claims] 1. An uppermost frame of a building is trimmed from a lower frame of the building, and the uppermost frame is supported by the lower frame via an elastic support in a horizontally displaceable manner. The damping structure of the building. 2. The damping structure for a building according to claim 1, wherein the uppermost skeleton and the lower skeleton are trimmed at the upper ends of the pillars forming the building. Vibration control structure. 3. The vibration control structure for a building according to claim 1, wherein the uppermost skeleton body and the lower skeleton body are edge-cut by a leg portion of a pillar constituting the uppermost floor of the building. Vibration control structure for the building. 4. The vibration control structure for a building according to claim 1, wherein the uppermost skeleton is composed of a beam erected on upper ends of columns constituting the building, and a rooftop slab formed on the beam. The vibration damping structure for a building, wherein the uppermost skeleton and the lower skeleton are trimmed by the upper ends of the columns and the outer ends of the beams. 5. The damping structure for a building according to claim 1, wherein the lower frame of the building is
A core portion having a cylindrical cross section assembled so as to be continuous in the vertical direction is provided, and the elastic support body is interposed between the core portion and the uppermost body. Vibration control structure of the building. 6. The vibration control structure for a building according to claim 1, wherein when the uppermost skeleton is displaced with respect to the elastic support body with respect to the lower skeleton due to an earthquake or the like, the displacement of the elastic support body is displaced. A damping structure for a building, which is provided with a damping mechanism for damping the.