JPH08302829A - Vibration control structure for unit building - Google Patents

Abstract

PURPOSE: To minimize floor impact noise of an upper floor by means of reducing oscillation at the time of floor impact of an upper floor building unit by deformation of visco-elasticity of a damping material by interposing the damping material with rubber elasticity between floor large beams of the upper floor building unit) and ceiling large beams of lower floor building unity ajoining each other. CONSTITUTION: A damping material 18 having rubber elasticity is interposed between floor large beams 6, 6 of upper floor building units 3a adjoining each other or/and ceiling large beams of lower floor building units 2a adjoining each other. Consequently, the oscillation at the time of floor impact of the upper floor building units 3a loses it energy in a form of visco-elasticity deformation of rubber elasticity of the damping material installed between the floor large beams 6, 6 and the ceiling large beams, and it is reduced. Accordingly, floor impact noise of an upper floor is extremely reduced in a room on a lower floor. Oscillation of the whole building unit is efficiently absorbed in comparison with partial absorption of a conventional floor small beam, etc., by absorbing the oscillation between the floor large beams 6, 6 of a main frame of a building unit or the ceiling large beams.

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 for a unit building.

[0002]

2. Description of the Related Art Conventionally, as a vibration control structure for a floor structure used in a unit building (assembled house), as shown in FIG. Vibration absorbing plate 13
Which suppresses the vibration of the floor surface by interposing a sheet (for example, refer to JP-A-59-76351, JP-A-59-98949, etc.), or floors arranged orthogonally to each other as shown in FIG. For example, there is a method for preventing floor squeal by bonding the beam 11 and the joist material 14 on the upper part thereof with an adhesive (see, for example, JP-A-62-72859).

[0003]

However, in the above conventional vibration damping structure, even if the partial vibration of the floor girder 11 can be suppressed, the vibration of the floor girder 6 which is the main skeleton of the building unit is suppressed. As a result, the floor impact sound of the upper floor may be heard in the room on the lower floor, and the comfortable living sound environment may be impaired. The present invention has been made in view of the above circumstances, and an object thereof is to provide a vibration control structure for a unit building capable of improving sound insulation performance in a room on the lower floor against floor impact sound on the upper floor. There is.

[0004]

In order to solve the above-mentioned problems, the invention according to claim 1 is a vibration control structure for a unit building formed by assembling a plurality of building units in vertical and horizontal directions. A damping material is interposed between floor girders of adjacent upper floor building units and / or between ceiling girders of lower floor building units adjacent to each other.

According to a second aspect of the present invention, in a vibration control structure for a unit building formed by assembling a plurality of building units vertically and horizontally, between floor girders of adjacent upper floor building units or / And a damping material having rubber elasticity between the ceiling girders of the lower-floor building units adjacent to each other,
A spacer having rigidity is inserted.

The invention according to claim 3 is the vibration damping structure for a unit building according to claim 1 or 2, wherein the damping material has an elastic modulus of 1.0 × 10 ^{8 to} 1.0 × 10 ^9. It is Pascal and has a loss coefficient of 0.4 to 1.5.

According to a fourth aspect of the present invention, there is provided the vibration damping structure for a unit building according to the first or second aspect, in which the damping material has two or more elastic plates having rubber elasticity, and between the elastic plates. It is a laminated body made of a metal plate provided in the.

The invention according to claim 5 is the damping structure for a unit building according to claim 1 or 2, wherein the damping material is a wedge-shaped metal piece inserted into a metal plate having a V-shaped cross section. The elastic material is provided on both side surfaces.

[0009]

According to the present invention, the damping material having rubber elasticity is interposed between the floor girders of the upper-floor building units adjacent to each other and / or the ceiling girders of the lower-floor building units adjacent to each other. Therefore, the vibration of the upper-floor building unit at the time of floor impact loses energy in the form of viscoelastic deformation of rubber damping of the damping material provided between the floor girders and between the ceiling girders, and is reduced. Therefore, the floor impact sound on the upper floor is extremely low in the room on the lower floor. Since this vibration is absorbed between the floor girders or between the ceiling girders, which is the main skeleton of the building unit, the vibration of the entire building unit is absorbed and is more efficient than the conventional partial absorption of the floor girders.

In the invention according to claim 2, a damping material having rubber elasticity is interposed between the floor girders of the upper-floor building units adjacent to each other and / or the ceiling girders of the lower-floor building units adjacent to each other. Since it is inserted, like the invention of claim 1, energy is lost in the form of viscoelastic viscoelastic deformation of the damping material provided between the floor girders and between the ceiling girders, and vibration during floor vibration is generated. To reduce. Further, in addition to the above action, since a spacer having rigidity is interposed between the floor girders of the adjacent upper floor building units or / and between the ceiling girders of the adjacent lower floor building units, the space between the floor girders is increased. Or / Because the ceiling girders are firmly connected by a spacer having rigidity and vibration is prevented in the entire building, it is possible to further prevent shaking of the upper floor building unit.

According to the invention of claim 3, the damping material has an elastic modulus of 1.0 × 10 ^{8 to} 1.0 × 10 ⁹ pascals and a loss coefficient of 0.4 to 1.5. , The vibration of the upper-floor building unit can be efficiently reduced, and the upper-floor building unit can be prevented from shaking.

In the invention according to claim 4, the damping material is
Since it is a laminated body composed of two or more elastic plates having rubber elasticity and a metal plate provided between the elastic plates, the metal plate between the elastic plates is heavier than the elastic plates and is less likely to vibrate. The vibration of the plate is reduced and therefore
Better sound insulation than a vibration control material consisting only of elastic material. Therefore, the shaking of the floor surface of the upper-floor building unit can be prevented more efficiently.

According to the invention of claim 5, the damping material is
Since the wedge-shaped metal piece is inserted into the metal plate having a V-shaped cross section and the elastic material is provided on both side surfaces thereof, elasticity is provided by the metal plate and the wedge-shaped metal piece as in the invention of claim 4. Vibration of the material is reduced, and the sound insulation performance of the damping material is good. Furthermore,
The width can be easily reduced by removing the wedge-shaped metal piece and holding both sides of the opening having a V-shaped cross section and bringing both sides closer to each other. Therefore, by reducing the width in this way and inserting a metal plate having a V-shaped cross section between the floor girders and between the ceiling girders, and then pushing a wedge-shaped metal piece into the V-shaped cross section,
The damping material can be easily provided between the floor girders or between the floor girders.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a perspective view showing the overall structure of a unit building to which the vibration damping structure between floor girders according to the first embodiment of the present invention is applied. FIG. 2 shows the unit building. 3 and 4 are perspective views showing the structure of each building unit.
FIG. 5 is an exploded perspective view showing a part of the same frame structure (vibration damping structure between beam girders) in an enlarged manner, and FIG. 5 is an exploded perspective view showing a vibration damping structure between floor girders according to the first embodiment of the present invention. FIG. 6 and FIG.
[FIG. 3] is a cross-sectional view showing a floor structure of an upper floor in a unit building, FIG. 1A is a cross-sectional view showing a conventional floor structure, and FIG. 1B is related to a first embodiment of the present invention. It is a sectional view which shows a floor structure and which follows the AA line of FIG.

In order to increase the industrial production rate of a unit building, a unit building is divided into several units in advance and factory-manufactured, and these are constructed and constructed at a construction site.
It is a building that is assembled. That is, as shown in FIG. 1, the unit building is installed by arranging a plurality of lower floor building units 2a, 2b, ... Adjacent to the upper part of the foundations 1, 1 ,. Floor building unit 2a,
2b, ... Above the upper floor building units 3a, 3b, ...
・ ・ Assemble correspondingly. The building units 2a, 3a, ... Adjacent to each other in the vertical and horizontal directions are coupled to each other, and further, the coupled upper floor building unit 3 is coupled.
Roof units 4a, 4b, are provided on top of a, 3b, ...
... is attached. A partition wall is provided in the upper-floor building units (3a, 3b) and the lower-floor building units 2a, 2b constructed and assembled in this manner to provide a living room, a dining room,
It constitutes each room such as a bedroom. Then, the building units 2a, 2b, 3a, 3b are formed by combining a plurality of structural materials into a substantially rectangular parallelepiped shape in a transportable size. That is, in the upper-floor building units 3a, 3b and the lower-floor building units 2a, 2b, square steel pipe columns 5, 5, 5, 5 are erected at four corners, as shown in FIG. Of the columns 5 and 5 that are erected, the girder floor girders 6 and 6 made of channel steel are provided between the lower ends of the columns 5 and 5 that face each other in the X direction.
, And gable floor girders 7, 7 also made of channel steel are arranged between the lower ends of the columns 5, 5 facing each other in the Y direction.

On the other hand, among the vertically arranged columns 5 and 5, girder ceiling girders 8 made of channel steel are arranged between the upper ends of the columns 5 and 5 facing each other in the X direction. Further, gable ceiling girders 9 and 9 made of channel steel are arranged between the upper ends of the columns 5 and 5 facing each other in the Y direction. Girder floor girders 6 facing each other vertically
A stud (stud) 10 is interposed between and the girder ceiling girder 8.

Between a pair of girder floor girders 6 and 6 facing each other, a plurality of floor girders 11 and 1 made of square steel pipe, grooved steel or the like are provided.
1, ... Are provided in the X direction at predetermined intervals. As shown in FIGS. 3 and 4, each floor beam 1
A connecting piece 12 made of channel steel is attached to the end of the connecting beam 12. The end of the floor beam 11 and the girder floor girder 6 are connected to each other by the flange 12a of the connecting piece 12. And girder floor girder 6
And the flange portion 6a are welded together. Further, as shown in FIG. 3, a vibration absorbing plate 13 such as a particle board is provided between the specific floor beam 11 and the adjacent floor beam 11 in order to suppress the vibration of the floor beam 11.
Is interposed.

As shown in FIG. 2, floor beams 11, 11, ...
... A plurality of joists 14, 14, ... Are arranged at predetermined intervals in the Y direction between a pair of gable floor girders 7, 7 facing each other at the upper part of. . Each joist 14
4, as shown in FIG. 4, is joined to the floor crossbeams 11, 11, ... At the intersection with the floor crossbeams 11, 11, ... With an adhesive to prevent floor squeal. Integrated,
The nails 15, 15 are firmly joined to the floor crossbeams 11, 11, .... Furthermore, joists 14, 14, ...
A floor material 16 such as a particle board is attached to the upper surface of the ... With an adhesive and a nail. Thus, each pair of girder floor girders 6, 6 and gable floor girders 7, 7 and floor girders 11, 1
The floor portion of the building unit 3a (2a, ...), that is, the floor structure is constituted by 1, ..., the vibration absorbing plate 13, the joist members 14, 14 ,. .

On the other hand, a pair of girder ceiling girders 8 and 8 facing each other.
A plurality of ceiling joists 17, 17, ... Are bridged over each other at predetermined intervals in the X direction. A ceiling surface material (not shown) is attached to the lower surface of each ceiling beam 17, and the ceiling portion of the building unit is configured in this manner.

As described above, the lower and upper building units 2a, 3a, ... With such a structure are arranged above and below the foundations 1, 1 ,. Horizontally adjacent to each other and coupled to each other, as shown in FIG. 6, each building unit 2a, 3a ,.
.. The floor surface members 16, 16 of the floor structure are connected to each other to complete the unit building. In the completed unit building, the building unit 3a on the upper floor adjacent to the girder side,
Between 3a (3b, 3b), as shown in FIG. 5 and FIG. 6 (b), girder beam girder 6 forming one building unit 3a (3a) and the other building unit 3a (3a) are formed. The girder floor girder 6 and a predetermined space (in this example, about 2
5 mm) are arranged opposite to each other, and three damping materials 18, 18, 18 are interposed between these girder floor girders 6, 6 with a predetermined interval. Similarly, between the upper-floor building units 3a and 3b adjacent on the wife side, a gable floor girder 7 that constitutes one building unit 3a and a gable floor girder 7 that constitutes the other building unit 3b have a predetermined size. Two damping materials 1 are placed between the gable floor girders 7, 7 which are arranged to face each other with a space (about 25 mm in this example).
8 and 18 are inserted at a predetermined interval.

The damping material 18 is a rectangular and plate-shaped material made of an acrylic resin as a main component, which is obtained by copolymerizing butyl acrylate and acrylic acid with ultraviolet rays (thickness: about 15 mm, vertical dimension). 5 cm, lateral dimension 10 cm), and a pair of supporting steel plates (thickness of about 5 mm, vertical dimension 10 cm, lateral dimension 2) so that this damping material 18 can be easily inserted between the beams.
0 cm) 21 and 21 are sandwiched between beams as a laminated structure A having a thickness of about 25 mm. This damping material 18 is formed by adding an appropriate amount of an additive when molding by ultraviolet polymerization,
An acrylic resin plate adjusted to have an elastic modulus (Young's modulus) of 2.59 × 10 ⁸ Pascal and a loss coefficient of 1.12. Here, the loss coefficient is a difference between an input and an output, that is, a degree of energy loss, in other words, an amount representing a magnitude of internal friction of a material. In the laminated structure A having the above structure, the girder floor girder 6 (gable floor girder 7) and the corresponding supporting steel plate 21 are
It is fastened and fixed with bolts.

Next, in order to confirm the effect of the damping material 18, the measurement result of the sound insulation performance performed in the unit building in which the damping material 18 is inserted will be described. For comparison,
The same sound insulation performance was measured in a conventional unit building having the same configuration as that of the unit building according to this example and in which the damping material 18 was not inserted. This measurement is based on Japanese Industrial Standards (JIS
In accordance with the regulations of A 1418), as shown in FIGS. 6 (a) and 6 (b), a heavy impact source 19 such as an automobile tire is allowed to fall freely from a predetermined height (90 cm) onto the floor surface of the upper floor room to reduce the weight. A sound level meter observed how much the impact sound generated when the impact source hits the floor surface (floor surface material 16) vertically was shielded in the lower floor room. As a result of this measurement, in the unit building in which the damping material 18 is inserted ((a) in the figure), there is 63 more than in the unit building in which the damping material 18 is not inserted ((b) in the figure).
The noise in the range of up to 250 Hz is reduced by 1 dB, and this reduction amount is a level difference that the human ear feels to be quiet.

In addition to the acrylic resin plate having the above physical properties, the elastic modulus (Young's modulus) is 1.0 × 10 ^{8 to} 1.0.
It has been confirmed by experiments that the same sound insulation performance as described above can be obtained with a synthetic resin plate or a rubber plate adjusted to a range of × 10 ⁹ pascals and a loss coefficient of 0.4 to 1.5.
Further, even a rigid resin or rubber which does not reach the above physical properties, as long as it has rubber elasticity, since it has a considerable sound insulation performance, it can be used in a place where the sound insulation performance is not so required.

As described above, according to the above construction, even when a shock is applied to the floor surface of the upper floor in the unit building, the shock absorbing energy is absorbed by the damping material 18, so that the sound insulation performance for the lower floor room is further improved. .

(Second Embodiment) FIG. 7 is an exploded perspective view showing a vibration damping structure between floor girders according to a second embodiment of the present invention. The vibration damping structure of the second embodiment differs from that of the first embodiment described above in that the number of the laminated structures A to which the vibration damping material 18 is attached is partially reduced, and instead,
The point is that the spacer B having rigidity is added. That is, in this example, as shown in the same figure, of the three laminated structures A, A, A interposed between the girder floor girders 6, 6, the middle laminated structure A is removed and replaced. , A spacer B having rigidity is inserted. The spacer B is a rectangular steel plate (thickness: about 15 mm, vertical dimension: 5 cm,
A horizontal dimension of 10 cm) 22 and a pair of supporting steel plates (thickness of about 5 m
m, vertical dimension 10 cm, horizontal dimension 20 cm) A laminated structure with a thickness of about 25 mm sandwiched between 23, 23, girder floor beams 6, 6
It is used to make a rigid connection between spaces.

With the configuration of this example as well, it is possible to obtain substantially the same effects as described above in the first embodiment. In addition, since the impact can be reliably received by the two girder floor girders 6 and 6 facing each other, it is possible to prevent the floor surface from shaking on the upper floor.

(Third Embodiment) FIG. 8 is a perspective view showing a damping material according to a third embodiment of the present invention. The vibration damping structure of the third embodiment differs from that of the first embodiment described above in the structure of the vibration damping material 18a. That is, the damping material 18a has a thickness of 1 mm on both sides of the metal plate 24 having a thickness of 5 mm.
5 layers of butyl tape are attached and an elastic plate 25 made of butyl rubber having a thickness of 5 mm is attached. Further, it is used as a laminated structure C in which supporting steel plates 21a are attached to both sides of the vibration damping material 18a so as to be easily attached between the beams. This damping material 18a is the elastic plate 2
Since the metal plate 24, which is less likely to vibrate than the elastic plate, is attached between the elastic plates 5, the vibration of the elastic plate 25 is reduced by this metal plate 24, and therefore, the sound insulation performance is better than that of the vibration damping material composed only of the elastic plate 25. Good. Therefore, the performance of the damping material is 1.0 elastic modulus.
× 10 ^{8 to} 1.0 × 10 ⁹ Pascal, loss factor 0.4
It can be used even if it is other than ~ 1.5.

(Fourth Embodiment) FIG. 9 is a perspective view showing a damping material according to a fourth embodiment of the present invention. The vibration damping structure of the fourth embodiment differs from that of the first embodiment described above in the structure of the vibration damping material 18c. That is, in this damping material 18c, a wedge-shaped metal piece 27 is inserted into a metal plate 26 having a V-shaped cross section, and elastic members 28 are provided on both side surfaces of the metal plate 26.
Is provided. This damping material 18c is made of elastic material 2
Since there is a metal plate 26 having a V-shaped cross section and a wedge-shaped metal piece 27, which is heavier than the elastic material 28 and is difficult to vibrate, the metal plate 26 and the metal piece 27 reduce the vibration of the elastic material 28 and the sound insulation performance. Is good. Further, the wedge-shaped metal piece 27 is removed, and both sides of the opening portion of the metal plate 26 having a V-shaped cross section are held close to each other,
The width of the metal plate 26 is reduced and inserted between the floor girders or between the ceiling girders, and then the wedge-shaped metal piece 2 is inserted into the V-shaped cross section of the metal plate 26.
By pushing in 7, the damping material 18c can be easily provided between the floor girders or between the floor girders.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure is not limited to this embodiment, and there are design changes and the like within the scope not departing from the gist of the present invention. Also included in the present invention. For example, the numbers of the damping material and the plate material having rigidity can be appropriately increased or decreased. Further, the shape dimensions of the damping material and the plate material having rigidity are not limited to those of the embodiment. Further, in the above-described embodiment, the case where the damping material or the plate material having rigidity is provided between the floor girders between the upper-floor building units has been described, but instead of this or in addition to this, the lower-floor building A damping material or a plate material having rigidity may be provided between the ceiling girders between the units. Further, in the above-described embodiment, the case where the damping material has a laminated structure of the viscoelastic member and the pair of supporting steel plates has been described, but the pair of supporting steel plates may be appropriately omitted. The same applies to a plate material having rigidity.

[0030]

As described above, according to the first aspect of the invention, the rubber elasticity is provided between the floor girders of the adjacent upper floor building units or / and between the ceiling girders of the adjacent lower floor building units. Since the existing damping material is inserted, the vibration of the upper floor building unit at the time of floor impact loses energy in the form of viscoelastic deformation of the rubber elasticity of the damping material provided between the floor girders and between the ceiling girders. Therefore, it is more efficient than the conventional partial absorption of floor beams and the like.

In the invention according to claim 2, the damping material having rubber elasticity is interposed between the floor girders of the upper floor building units adjacent to each other or / and between the ceiling girders of the lower floor building units adjacent to each other. Since it is inserted, energy is lost in the form of viscoelastic deformation of the damping material provided between the floor girders and between the ceiling girders, and floor vibration is reduced, as in the first aspect of the invention. . Further, in addition to the above action, since a spacer having rigidity is interposed between floor girders of adjacent upper floor building units or / and between ceiling girders of adjacent lower floor building units, an upper floor building is provided. The shaking of the unit can be prevented even better.

In the invention according to claim 3, the damping material has an elastic modulus of 1.0 × 10 ^{8 to} 1.0 × 10 ⁹ pascals and a loss coefficient of 0.4 to 1.5. , The vibration of the upper-floor building unit can be efficiently reduced, and the upper-floor building unit can be prevented from shaking. In the invention according to claim 4, the damping material is a laminated body including two or more elastic plates having rubber elasticity and a metal plate provided between the elastic plates. The vibration is reduced, and therefore the sound insulation performance is better than that of the vibration damping material composed only of the elastic body.

In the invention according to claim 5, the damping material is
Since the wedge-shaped metal piece is inserted into the metal plate having a V-shaped cross section and the elastic material is provided on both side surfaces thereof, elasticity is provided by the metal plate and the wedge-shaped metal piece as in the invention of claim 4. Vibration of the material is reduced, and the sound insulation performance of the damping material is good. As described above, in the inventions according to claims 1 to 5, since the vibration of the building unit is reduced, the damping structure of the unit building of the present invention improves the sound insulation performance in the room on the lower floor against the floor impact sound on the upper floor. ,
Extremely valuable.

In the invention according to claim 5, the wedge-shaped metal piece is removed, the width is reduced and a metal plate having a V-shaped cross section is inserted between the floor girders or between the ceiling girders, and then the V-shaped cross section is used. By inserting the wedge-shaped metal piece into the inside, the damping material can be easily provided between the floor girders or between the floor girders, so that the workability is good.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall configuration of a unit building to which a vibration damping structure between floor girders according to a first embodiment of the present invention is applied.

FIG. 2 is a perspective view showing a skeleton structure of each building unit constituting the unit building.

FIG. 3 is a partially enlarged view showing a part of the same frame structure (vibration damping structure between crossbeams) in an enlarged manner.

FIG. 4 is a partially enlarged view showing an enlarged part of the structure of the same body (vibration damping structure between crossbeams).

FIG. 5 is an exploded perspective view showing an exploded structure of the vibration damping structure between the girders between building units according to the first embodiment of the present invention.

6A and 6B are cross-sectional views showing a floor structure of an upper floor in a unit building, FIG. 6A is a cross-sectional view showing a conventional floor structure, and FIG. 6B is a first embodiment of the present invention. It is sectional drawing which shows the floor structure which concerns on an example and which follows the AA line of FIG.

FIG. 7 is an exploded perspective view showing a vibration damping structure between floor girders according to a second embodiment of the present invention in an exploded manner.

FIG. 8 is a perspective view showing a damping material according to a third embodiment of the present invention.

FIG. 9 is a perspective view showing a damping material according to a fourth embodiment of the present invention.

[Explanation of symbols]

 2a, 2b Lower-floor building unit 3a, 3b Upper-floor building unit 6 Girder floor girder (floor girder) 7 Gable floor girder (floor girder) 8 Girder ceiling girder (ceiling girder) 9 Gable ceiling girder (ceiling girder) 18, 18a, 18c Damping material 24 Metal plate 25 Elastic plate 26 Metal plate with V-shaped cross section 27 Wedge-shaped metal piece 28 Elastic material B Spacer

Claims (5)

[Claims] 1. In a vibration control structure of a unit building formed by vertically and horizontally assembling a plurality of building units, between floor girders of adjacent upper floor building units or /
And a vibration damping structure for a unit building, in which a damping material having rubber elasticity is interposed between the ceiling girders of lower-floor building units adjacent to each other. 2. In a vibration control structure of a unit building formed by vertically and horizontally assembling a plurality of building units, between floor girders of upper-floor building units adjacent to each other or /
And a damping structure having rubber elasticity and a spacer having rigidity interposed between the ceiling girders of adjacent lower-floor building units. 3. The damping material has an elastic modulus of 1.0 × 10 ⁸ to
1.0 × 10 ⁹ Pascal, loss factor 0.4-
The vibration control structure for a unit building according to claim 1 or 2, wherein the vibration control structure is 1.5. 4. The unit according to claim 1, wherein the damping material is a laminated body composed of two or more elastic plates having rubber elasticity and a metal plate provided between the elastic plates. Vibration control structure of the building. 5. The vibration damping material according to claim 1, wherein a wedge-shaped metal piece is inserted in a metal plate having a V-shaped cross section, and elastic materials are provided on both side surfaces. Damping structure of the unit building of.