WO2006030982A1

WO2006030982A1 - Damping floor structure

Info

Publication number: WO2006030982A1
Application number: PCT/JP2005/017550
Authority: WO
Inventors: Yoshimitsu Murahashi; Hiroaki Kawakami; Akio Sugimoto; Kazuki Tsugihashi
Original assignee: Nippon Steel Corporation; Kabushiki Kaisha Kobe Seiko Sho
Priority date: 2004-09-17
Filing date: 2005-09-16
Publication date: 2006-03-23
Also published as: JP5044109B2; KR100854831B1; TW200613622A; JP2006112219A; CN101023227A; KR20070046173A; CN101023227B; TWI270597B

Abstract

A damping floor structure in which the quality of a powdery/granular material is optimized to easily fill a desired local region with the powdery/granular material, the field work efficiency and the damping performance of a floor are enhanced, and lightweight impact sound is isolated. In the damping floor structure (1) for suppressing vibration of a beam (12) supporting a floor plate (11), a hollow space (13) where the powdery/granular material (14) is placed up to a specified height is formed in the beam (12). The powdery/granular material (14) contains Fe and CaO, and SiO2 is deposited on the surface thereof, thus decreasing the angle of repose and enhancing the fluidity of the powdery/granular material.

Description

Damping floor structure

Technical field

The present invention relates to a vibration-damping floor structure for suppressing vibrations transmitted to a beam or joist that supports a floor board.

Background art

The floor structure of a building structure such as a general house is generally constructed by supporting a floor board with a frame member such as a frame or a beam. When an impact from walking or work is applied to such a floor board, vibration is generated, which causes unpleasant noise or unpleasant vibration. Especially in detached houses and mansion where metal members are used as beams, vibrations and impact sounds generated in floor plates of living rooms and corridors are directly propagated downstairs, which is large for downstairs residents. It also causes unpleasant discomfort.

For this reason, in particular, in recent years, an anti-vibration material such as a sound insulation material has been installed between the upper floor board and the lower floor ceiling to suppress vibrations applied to the floor board, and thus to improve the comfort. Has been made. The damping material, for example, absorbs vibration energy due to impact vibration applied to the floor plate and converts it into thermal energy, thereby suppressing the resonance amplification of the natural vibration system and increasing the distance attenuation of vibration propagation, or the diffusion vibration plate It is a material that prevents energy storage. The sound insulating material is a material for receiving the sound wave propagating in the air and minimizing the acoustic output of the sound wave radiated from the back surface of the sound insulating material. The "damping material" described below is defined as a material that has both functions of vibration damping and sound insulation. As a damping material that can effectively reduce the vibration of the floor plate, for example, a sound insulating floor as disclosed in Japanese Patent Application Laid-Open No. 10_2020503 has been devised. For example, as shown in Fig. 19, the sound insulation floor 1 1 1 has a floor surface material 1 1 5 fixed to the upper surface of the molded cement panel 1 1 3 with a tapping screw 1 1 7, and the molded cement panel 1 1 3 is configured by arranging a plurality of hollow portions 1 1 9 in parallel.

The hollow portion 1 1 9 in the molded cement panel 1 1 3 is filled with an aggregate 1 2 1 of sandy grains such as dredged sand, and this aggregate 1 2 1 is given to the molded cement panel 1 1 3. It is possible to move freely in the hollow part 1 1 9 by virtue of the vibration energy.

When an object falls on such a sound insulation floor 1 1 1 or a person jumps, an impact based on this propagates to the molded cement panel 1 1 3 through the floor surface material 1 1 5. As a result, the molding cement panel 1 1 3 vibrates, and in response to this, the particles 1 2 1 in the sandy grains filled in the hollow portions 1 1 9 vibrate, and the molding cement panel 1 Part of the vibration energy that vibrates Lu 1 1 3 is absorbed as energy for vibrating the particles of Aggregate 1 2 1. In other words, the impact propagating to the molded cement panel 11 13 is mitigated by absorbing this energy, and as a result, the sound insulation to the lower floor side can be improved.

Further, as another example of the damping material, for example, a damping panel as disclosed in Japanese Patent Application Laid-Open No. 1 1-2 1 78 9 1 has been proposed. For example, as shown in FIG. 20, the vibration control panel 1 3 0 has a cell space 1 3 4 by partitioning a space portion between two opposing plate members 1 3 1 and 1 3 2 with a partition plate 1 3 3. The cell space 1 3 4 is formed by enclosing an elastic granular material 1 3 5 having hysteresis elastic deformability.

In this conventional damping panel 1 3 0, vibrations in the low frequency band On the other hand, this can be absorbed by converting the vibration energy into thermal energy by the friction of the elastic granular material 1 3 5 due to elastic vibration. In addition, with respect to vibrations in the middle frequency band, absorption of vibration energy can be further promoted by collisions between the elastic powder particles 1 3 5. Further, for vibrations in a high frequency band, absorption of vibration energy can be promoted by a collision based on the jumping of the elastic granular material 1 35.

As another example of the damping material, for example, a floor structure 1 4 1 as disclosed in Japanese Patent Application Laid-Open No. 2 0 0 2-1 1 5 3 6 3 has been proposed. As shown in Fig. 21, the floor structure 1 4 1 has a beam 1 4 3 bonded to the floor plate 1 4 4, and a hollow portion 1 formed inside the beam 1 4 3. 5 1 An elastic bag body 1 5 2 with inner and outer surfaces coated with rubber is inserted into 5 1. The bag body 1 5 2 is filled with powder body 1 5 3. This floor structure 1 4 1 can also exhibit damping (soundproof) characteristics based on the same mechanism.

In addition, based on the concept of increasing the surface density by filling a double-walled intermediate air layer with powder particles and improving the sound insulation performance, sound insulation characteristics are provided to partitions that partition office spaces such as offices. A technology to make it available has also been proposed (see, for example, Japanese Patent Laid-Open No. 8-177171). In this technology, the main component of the highly sound-insulating partition is constructed as a main component with a panel having a hollow structure, and the surface density is reduced by injecting converter-blown slag into the hollow structure. Increase. The crushed slag injected here has a particle size of 3.0 mm or less, and the angle of repose is 12 to 16 ° and has excellent fluidity. Can be easily discharged. Disclosure of the invention However, the damping material disclosed in the above-mentioned patent document has a problem in that it cannot effectively exhibit the sound insulation performance and the damping performance because the bulk specific gravity of the powder particles used is low. . In other words, in order to further improve the vibration damping performance and the like, it is necessary to make the bulk density of the granular material used for the vibration damping material heavier than before and to about 2. O t Z m ³ . Furthermore, there was a need to realize this at a low cost when increasing the bulk density of the granular material.

Also disclosed in the above-mentioned Japanese Laid-Open Patent Publications Nos. 10-2 0 5 043, 1- 2 1 7 8 9 1 and 2 0 0 2- 1 1 5 3 6 3 Since the vibration damping material used is not excellent in the fluidity of the granular material to be used, a great deal of labor must be spent to accurately fill the desired local region. In particular, when filling a damping material with a granular material with poor fluidity, it is not possible to use a filling method that uses air blow or the like or a filling method that uses the self-leveling effect. There was a problem that improvement could not be achieved.

In particular, the granular material shown in Japanese Patent Laid-open No. 2 0 0 2 — 1 1 5 3 6 3 does not jump entirely inside the hollow portion, but the upper portion jumps and exhibits a damping effect, The remaining portion hardly jumps and acts as a weight for reducing heavy impact sound. For this reason, the vibration control effect was not exhibited according to the filling amount, and there was room for improvement in terms of achieving a further vibration control effect.

Accordingly, the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is to optimize the material of the powder and granular material so that it can be used in a desired local region. With respect to a vibration-damping floor structure that can easily fill the particles and improve work efficiency, floor vibration caused by walking can be reduced by improving the vibration-damping performance. In addition, it is intended to provide a more effective damping floor structure for suppressing light weight impact sound and heavy weight impact sound.

In order to solve the above-mentioned problems, the present inventor has a configuration in which a high-fluidity converter-blown slag as shown in Japanese Patent Application Laid-Open No. Hei 8 _ 1 717 4 1 is injected into a beam supporting a floor plate. I found. In order to inject into the beams supported by the floorboard, it is necessary to further improve the workability at the site, so the angle of repose needs to be made smaller, so the material of the powder was optimized.

That is, the vibration-damping floor structure according to the present invention is a vibration-damping floor structure comprising at least a floor and a beam, and a hollow space into which the granular material is inserted is formed inside the beam. F e, C A_〇 filling, also those containing S i 〇 _2, damping floor structure according to the present invention, a floor structure comprising a floor plate and a beam for supporting the at least, disposed in the floor structure and a member, the filling member is formed hollow space granule is inserted, granules are those comprising F e, C a O, a S i 〇 _2.

In the vibration-damping floor structure according to the present invention, in the vibration-damping floor structure for suppressing the vibration of the beam supporting the floor plate, a hollow space in which powder particles are enclosed to a predetermined height is formed inside the beam. is, the granular material to be al, with including C a O to F e parallel beauty, S i 〇 ₂ is formed by deposition on the surface.

As a result, in the vibration-damping floor structure according to the present invention, the fluidity of the powder particles can be increased, so that the ease of filling the hollow space can be improved. Moreover, in the vibration-damping floor structure to which the present invention is applied, the vibration damping performance can be improved, and as a result, the light impact sound can be effectively insulated.

In the vibration-damping floor structure according to the present invention, in addition to the above-described configuration, a plurality of joists crossing the beam are provided on the joists, and the joists are placed on the joists. A floor board is attached, and an elastic member or a viscoelastic member is interposed between the beam and the floor board.

Thereby, in the vibration-damping floor structure according to the present invention, in addition to the above-described effects, it is possible to effectively insulate the weight impact sound.

Furthermore, in the vibration-damping floor structure according to the present invention, in the vibration-damping floor structure for suppressing the vibration of the beam supporting the floor plate, the granular material is enclosed in the beam to a predetermined height. A hollow space is formed, and this granular material

, F e, C a O, S i ○ ₂ are included.

As a result, in the vibration-damping floor structure according to the present invention, it is possible to increase the bulk density of the granular material up to about 2. O tm ³ , which improves the vibration damping performance and sound insulation performance. In addition, since the molten metal can be used as the granular material, the manufacturing cost can be reduced. Brief Description of Drawings

FIG. 1 (a) is a perspective view showing a configuration of a vibration-damping floor structure to which the present invention is applied.

FIG. 1 (b) is a cross-sectional view showing the configuration of the vibration-damping floor structure to which the present invention is applied.

Fig. 2 is a diagram for explaining the particle size distribution of crushed slag as a granular material.

Fig. 3 is a diagram for explaining a method of filling powder particles into the hollow space provided inside the beam.

FIG. 4 (a) is a diagram for explaining another method for filling the granular material into the hollow space provided inside the beam.

Fig. 4 (b) is a diagram for explaining another method for filling the granular material into the hollow space provided inside the beam. FIG. 5 is a diagram for explaining a method of filling a desired local region in the beam 12 with a granular material.

Fig. 6 is a graph showing the damping performance of the crushed slag.

Fig. 7 is a graph showing the damping performance of the crushed slag.

Fig. 8 is a graph showing the damping performance of the crushed slag.

Fig. 9 is a graph showing the damping performance of the crushed slag.

FIG. 10 illustrates the frequency at the resonance point.

Fig. 11 (a) is a cross-sectional view taken along the line CC 'in Fig. 11 (b) of the damping floor structure in which the filling member filled with powder is externally attached to the beam.

Figure 11 (b) is a front cross-section of the vibration-damping floor structure that is externally attached to the beam of the filling member filled with powder.

Fig. 12 is a perspective view of a vibration-damping floor structure with multiple joists crossing the beam.

Fig. 13 is a perspective view of the fixing bracket provided between the beam and joist. Fig. 14 (a) is a side view of the fixing bracket provided between the beam and joist.

Fig. 14 (b) is a cross-sectional view taken along line D_D 'of Fig. 14 (a).

Fig. 1 O shows an example in which a vibration absorbing material is directly interposed between a beam and a joist crossing it.

FIG. 16 (a) is a diagram showing a configuration in which an external filling member is disposed on the side surface of the beam or joist, and the granular material is injected into the filling member. Fig. 16 (b) is a cross-sectional view along the line A-A 'in Fig. 16 (a).

FIG. 17 (a) is a front view for explaining another arrangement example of the filling member. FIG. 17B is a cross-sectional view for explaining another arrangement example of the filling members. FIG. 18 is a diagram for explaining an example in which filling members are arranged in a floor structure composed of beams and joists having different elastic moduli. Fig. 19 is a diagram for explaining the configuration of a conventionally proposed sound insulation floor.

FIG. 20 is a diagram for explaining the configuration of the conventionally proposed damping floor.

Figure 21 is a diagram for explaining the configuration of the floor structure proposed in the past. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, as a best mode for carrying out the present invention, a vibration-damping floor structure for suppressing vibration transmitted to a beam supporting a floor board will be described in detail with reference to the drawings.

FIG. 1 (a) is a perspective view showing an assembled state of the damping floor structure 1 to which the present invention is applied, and FIG. 1 (b) shows a cross-sectional view of the damping floor structure 1. The floor structure te 1 includes a floor plate 1 1 and a beam 1 2 that supports the floor plate 1 1. Also, in the damping floor structure 1, a hollow space is formed inside the beam 1 2.

1 3 is formed, and the granular material 14 is not enclosed in the hollow space i ₃ -3.

The floorboard 11 is used for, for example, a building structure of a general house. As shown in FIG. 1 (a), the end plate is placed on the upper surface of the beam 12 and a screw (not shown) is further illustrated. It is configured with screws. This floor board

When an impact from walking or work is applied to 1 1, vibration is generated and the vibration is also propagated to beam 1 2.

The beam 1 2 serves as a frame member of the building structure. For example, when applied to a wooden building, a wooden beam member having a rectangular cross section may be used. If it is applied to rebar structures such as steel, square steel pipes and H-shaped steel materials may be used. In the following explanation In this example, a rectangular steel pipe with a rectangular cross section is applied as the beam 12. Note that the wooden beams are made of H-shaped steel.

When applied as 2, a hollow space is formed inside the beam 12, and an external filling member is disposed in these, details of which will be described later.

In the present embodiment, the hollow space 13 is assumed to be a closed space that is hermetically sealed. However, the present invention is not limited to this, and an opening for injecting or discharging the granular material 14 is used. In addition, a ventilation hole (not shown) for ventilating may be provided. In this hollow space 13, a granular material 14 is inserted up to a predetermined height, and a boundary line 14 a between the inserted granular material 14 and the hollow portion is described later. Based on the self-leveling effect, it is approximately horizontal.

Granular material 1 4, F e, C A_〇, including S i 〇 _2. Fe is contained in order to optimize the specific gravity of the powder. C a O is added to suppress the expansion of the powder 14 over time. In addition, S i 0 ₂ is added to improve fluidity.

As an example of the granular material 14, so-called crushed slag generated in the steel making process may be used. This crushed slag is obtained by granulating molten slag with high-speed airflow. Because it disperses and flies into microdroplets by a high-speed air stream, it becomes spherical due to its self-surface tension, and its surface becomes glassy and clean by gas cooling. The crushed slag as the granular material 14 contains Fe and C a O, and S i 0 ₂ is deposited on the surface. In this case, components of the granular material 1 4, C A_〇 is 5 0 wt% or less, F e force 1 5 wt% or more, may be constituted by S i O ₂ is 9 wt% or more of the ingredients.

As an example of this granular material 14, for example, molten metal is used. You may make it do. This molten metal is discharged from, for example, a direct melting furnace for waste disposal. In this direct melting furnace for waste disposal, the incineration ash of garbage is melted in a reducing atmosphere in a closed melting furnace. Generally, incineration ash melts in this melting furnace and is separated into molten slag and molten metal. The separated molten metal is taken out and used as the powder 14.

The granular material 14 using molten metal consists of 85 wt% to 90 wt% of metal and 15 wt% to 10 wt% of slag (excluding moisture). with containing F e 8 0 wt% or more by weight, the C A_〇 to said slag total weight 3 0 wt% ~ 4 0 wt % S i 0 2 to 3 0 wt% ~ 4 0 wt % contains.

Tables 1 and 2 show examples of the metal and slag components that make up this molten metal. Molten metal composed of such component ratios is composed of 3.0 to 4. O t Zm ³ per bulk specific gravity. The granular material 14 to which the molten metal is applied has a particle size in the range of 0.1 to 13 mm, and the average particle size is 3 to 4 mm. Furthermore, the granular material 14 to which this molten metal is applied has an angle of repose of about 35 °. The metal slag content in the molten metal is not limited to the component ranges shown in Tables 1 and 2.

table 1

Metal content of molten metal

In the following, explanation will be given taking as an example the case of using air-pulverized slag as the granular material 14.

Figure 2 shows the particle size distribution curve of the pulverized slag as this granular material 14. is doing. As shown in FIG. 2, for example, when the molten slag added with glass is crushed, the powder 14 has a particle size in the range of about 0.05 mm to 5.0 mm. Incidentally, the average particle size calculated from the particle size distribution curve of the crushed slag shown in Fig. 2 is 1.02 mm. Note that the wind as the granular material 14 having the above-mentioned components and particle sizes is shown. Crushed slag has a true density of 2.5 t / m ³ or more, a bulk density of 1.5 t / m ³ , an angle of repose of 0 ° to 12 °, and a water absorption of 1. It is expressed as a physical property value of 5% or less.

That is, the powder 14 has the following physical properties by being composed of the above-described components and physical properties of the pulverized slag. First, Si 0 ₂ is precipitated on the surface. The fluidity can be improved by curing the surface. As a result, the angle of repose can be controlled in the range of 0 ° to 12 °, and the angle of repose can be as close to 0 ° as possible. As a result, it is possible to improve the action (self-leveling effect) in which the boundary line 14 a automatically becomes horizontal after the powder 14 is filled into the hollow space 13. .

This angle of repose is measured by a general mountain survey and refers to the maximum tilt angle at which the surface is stable without collapsing when the granular material is deposited. The lower the angle of repose, the better the fluidity. If the shape of the granule is made into a sphere and the slip of the surface is improved, a highly fluid granule with an angle of repose of 0 to 12 ° can be obtained. This high-fluidity granular material flows not only in the upper part but also in the interior due to vibration, resulting in a large loss due to flow and greatly improved vibration control performance.

In addition, by controlling the CaO contained in the powder 14 to 50 wt% or less, it is possible to suppress expansion over time. The mass of the granular material 14 is determined according to the content of Fe in the granular material 14. Further, the specific gravity of the granular material 14 is determined from the relationship between the mass and the particle size of the granular material 14. That is, it is possible to optimize the specific gravity of the powder 14 by adjusting the Fe content and particle size in the powder 14.

Next, a method of filling the powder 14 having the above-described configuration into the hollow space 13 provided inside the beam 12 will be described.

In this filling method, first, as shown in FIG. 3, the beam 1 2 into which the lid 18 b is inserted from the end portion 12 b is arranged obliquely, and then the granular material from the end portion 12 a. 1 4 is poured and the lid 1 8 a is inserted from the end 1 2 a of the beam 1 2 to be filled and sealed. Next, place the beam 1 2 filled with this granular material 14 approximately horizontally and either swing it in the direction A in Fig. 3 or around the axis of the member that extends the beam 1 2 in the longitudinal direction (in Fig. 3 Rotate in direction B). As a result, the powder 14 is automatically leveled based on its self-leveling effect.

The sea urchin, Kaze砕slag, because the angle of repose is higher 1 2 ⁰ or less and small rather fluidity, by using this as granular material 1 4, this in a relatively simple operation inside the beam 1 2 It can be horizontally horizontal. In addition, since the granular material 14 has high fluidity, it is possible to smoothly flow the granular material 14 from the end 1 2 a of the beam 1 2 to the end 1 2 13. It becomes possible. As a result, it becomes possible to remarkably improve the ease of filling the granular material 14.

In FIG. 3, an example in which the granular material 14 is poured from the end 1 2 a while the beam 1 2 is obliquely arranged is described, but the present invention is not limited to this. 2 may be arranged so that the longitudinal direction of 2 is substantially vertical, and the granular material 14 may be poured, or the longitudinal direction of the beam 1 2 may be substantially horizontal and the granular material is arranged. 1 4 flow It may be squeezed. In any case, it becomes possible to improve the ease of filling based on the high fluidity of the granular material 14, and the vibration-damping floor structure 1 to which the present invention is applied is previously installed in a factory or the like. Improve work efficiency not only when injecting granular material 14 into beam 1 2 during assembly work but also when injecting granular material 14 into beam 1 2 already under construction It becomes possible to make it.

For example, as shown in Fig. 4 (a), the beam 12 is already fixed on the building structure, and the metal or plastic lids 1 Ί a and 17 b are fitted from both ends. A plurality of openings 16 are provided at a predetermined pitch on the upper surface of 1 2. Next, a certain amount of the granular material 14 is inserted into each of the openings 16 through the hollow space 13 using a hose (not shown). The granular material 14 filled in the hollow space 1 3 of the beam 1 2 has a small angle of repose and high fluidity, so as shown in Fig. 4 (b), it is horizontal over time based on the self-pelling effect. It will be transformed. At this time, it is possible to promote such a self-leveling effect by artificially applying wind pressure or the like to the powder 14 filled in the hollow space 13.

Further, in the vibration-damping floor structure 1 to which the present invention is applied, the granular material 14 can be accurately filled even in a desired local region.

For example, as shown in Fig. 6, when only the central part of the beam 1 2 is filled with the granular material 14, the hollow space 1 3 is closed, for example, as foamed heat insulating material 2 0 a, 2 0 b A material for dividing the space is inserted in advance. This is achieved by inserting a certain amount of the granular material 14 into the hollow space 13 surrounded by the foam-based heat insulating materials 20 a and 20 b through the opening 16. Can do. Especially in building structures, in addition to improving vibration damping, focus on lightweight impact sounds and improve accuracy. The above-mentioned filling method is particularly effective for beams 1 2 for building structures because there are cases in which sound insulation is required. In the vibration-damping floor structure 1 in which the hollow space 1 3 of the beam 1 2 is filled with the granular material 1 4 based on the above-described method, for example, vibration energy due to impact vibration applied to the floor plate 1 1 propagates to the beam 1 2. Will be. This beam 1

When vibration energy is transmitted to 2, the beam 1 2 itself vibrates, and according to this, the powder 14 filled in the hollow space 1 3 vibrates. As a result, a part of the vibration energy for vibrating the beam 1 2 is absorbed as energy for vibrating the granular material 1 4. That is, the absorption of this energy reduces the vibrations acting on the beams 12 and thus the floor board 11 1, thereby suppressing the vibrations transmitted to the lower floor side.

Also, for example, when sound waves are transmitted through the air

The vibration energy based on the vibration caused by the sound wave is absorbed through the vibration in the hollow space 1 3 of the granular material 14, so that the sound transmitted to the lower floor can be insulated.

In particular, in the vibration-damping floor structure 1 to which the present invention is applied, by using wind slag having an average particle diameter of 1 mm as the granular material 14, the granular material 14 vibrates with respect to relatively small vibration. It is possible to more effectively insulate light impact sounds such as falling spoons of spoons and chair dragging sounds.

In particular, with the objective of suppressing the vibration of the beam 1 2 realized in the building structure, the case where the granular material 1 4 is injected during construction as shown in Fig. 4 and Fig. 5 above, the desired locality Since there are many cases where the granular material 14 is injected into the region, it is necessary to improve the work efficiency by increasing the fluidity of the granular material 14. This can be achieved by adjusting the angle of repose of the powder 14 to a range of 0 ° to 12 °. Furthermore, since the granular material 14 is controlled to have a Ca 0 content of 50 wt% or less, the preservability is improved by suppressing the temporal expansion of the granular material 14. As a result, it is possible to improve the reliability of the damping characteristics of the damping floor structure 1 itself.

In particular, by adjusting the particle size of the above-mentioned granular material 14 to 3.0 mm or less, the spherical shape becomes uniform and the surface state thereof is improved. Steel slag (such as blast furnace slag and steelmaking slag (converter slag, electric furnace slag, etc.)) that has a high specific gravity and is available in large quantities is suitably used as the raw material for molten slag. Pulverized slag using the above slag with a particle size of 3.0 mm or less has an angle of repose of 0 to 5 °, excellent flowability, and relatively high specific gravity.

As such a granular material 14, a blown slag classified to a particle size of 0.6 mm or less is more preferably used. Pulverized slag does not form extremely small grains due to its manufacturing method, and the lower limit of grain size is about 0.1 mm. Such finely crushed slag can be classified by a sieve having a predetermined roughness. When fine particles such as 0.1 to 0.6 mm in diameter are prepared, the whole appears to be similar to a high specific gravity fluid, and a large flow is generated by vibration, further improving the damping performance.

In addition, the loss coefficient in the 50 0 Z 1 3 octave band (44.5 to 5 6 Hz) was examined for the powder 14.

Specifically, the beam 1 2 is formed with a shape of width 40 mm X height 2 3 5 mm X plate thickness 1.0 mm, and 15.6 kg Zm (space filling rate 80%) in the hollow part The loss factor in 50 Hz 1 3 octave band (44.5 to 5 6 Hz) was examined. For comparison, we also examined the loss factor 7? Of reduced pellets 充填 filled at the same rate.

The high-fluidity granule used was milled slag, which was granulated at the milling stage. After classifying to a diameter of 3 mm or less, crushed slag was used as it was unsorted. When the angle of repose was measured for this crushed slag, it was 3 °.

The reduced pellets used for comparison were baked in a rotary kiln, and the shape was not perfect spheres, but rounded, and the particle size ranged from 9 to 16 mm. The angle of repose for this reduced pellet was measured and found to be 25 °.

Figure 6 shows the measurement results of the loss factor r? With respect to the excitation acceleration (G) of this crushed slag and reduced pellets 卜 at 50 Hz 1/3 octave band (44.5 to 56 Hz). Show.

The loss factor (7) is an index for evaluating the damping performance of a damping material such as a viscoelastic body. The granular material 14 is filled in the hollow space 1 3 of the beam 1 2 and the floor structure From the resonance peak in the frequency response curve of the driving point mobility (driving speed V / exciting force F) obtained by striking and struck, the following equation (1) was obtained.

7? = Δ f / f 0 (1)

Here, Δf is obtained from the following equation (2), where f 1 and f 2 (H z) are the frequencies at a point 3 dB lower than the resonance point. F ₀ is the frequency of the resonance point (see FIG. 10). .

Δ f = f ₂ -f, (2)

According to Fig. 6, crushed slag with an angle of repose of 3 ° has a loss factor τί over a wide range of excitation acceleration (G) of 1.0 or more compared to reduced pellets 卜 with an angle of repose of 25 °. Can be seen to be significantly higher. In the case of reduced pellets, only a part of the top jumps, while in the crushed slag, the jumping part is very wide. It was found that this phenomenon appears remarkably when the repose angle is less than 10 °. It was also found that this phenomenon occurs stably when the angle of repose is 0 to 5 °. Next, Fig. 7, 8, and 9 show the results of investigating the relationship between the amount of powdered slag and the particle size. As shown in the figure, the crushed slag shown in Fig. 7 is 14% by weight of particles less than 3 mm and greater than 2 mm, 56% by weight of particles greater than 2 mm and less than 1 mm, less than 1 mm and less than 0.6 mm. 20% by weight of grains and 10% by weight of grains of 0.6 mm or less.

The crushed slag in Fig. 8 is classified into grains of less than 1 mm and more than 0.6 mm.

The crushed slag in Fig. 9 is classified into particles of 0 6 mm or less. In all cases, the filling amount is 15.6 kg / m (space filling rate is about 80%)

), Filling amount 1 1.7 kg / m (space filling rate about 60%), filling amount 7.

It was measured for 5 kg / m (space filling factor of about 40%).

First, as for the effect of particle size, the loss factor for both the case of Fig. 7, which is undivided (including various particle sizes) at 3 mm or less, and the case of classification to 1 mm or less and more than 0.6 mm? 7 is almost unchanged. In addition, force not shown 3 mm or less

When α is classified to more than 2 mm, the loss factor 7? Decreases slightly even when it is classified to less than 2 mm and less than 1 mm. These things

In the case of air-pulverized slag, it can be seen that when the particle size is 3 mm or less and fine particles such as l mm or less are included, the loss factor, that is, the damping performance can be improved.

According to Fig. 9, those classified into 0.6 mm or less (the lower limit is about 0.1 mm from the production limit of the crushed slag) are less than 3 mm, less than l mm and more than 0.6 mm Compared with the classified one, the loss factor /? Is further improved. It can be seen that the loss factor, that is, the damping performance, is further improved by arranging fine particles of 0.6 mm or less.

Further, by finely adjusting the height of the powder 14 filled in the hollow space 13 or by changing the height of the powder 14 filled in the hollow 13 By adjusting the diameter, the absorption characteristics of the vibration propagating to the beam 12 may be changed. In such a case, among the generated crushed slag, only the crushed slag having a desired particle size is selectively extracted, and this is configured as the powder 14.

The present invention is not limited to the configuration in which the powder 14 is injected into the beam 12 as described above, but may be applied to the vibration-damping floor structure 2 described below. In this damping floor structure 2, the same components and members as those of the above-described damping floor structure 1 are denoted by the same reference numerals, and the description thereof is omitted here.

FIG. 11 (a) is a side view of the damping floor structure 2, and shows a cross section taken along the line C-C ′ in FIG. 11 (b). As shown in Fig. 11 (a) and Fig. Π (b), the damping floor structure 2 has a floor plate 1 1 and a beam 1 2 that supports the floor plate 1 1. Further, in this vibration damping floor structure 2, an external filling member 2 1 is provided for the beam 12, and a hollow space 2 2 in which the granular material 14 is poured into the filling member 2 1 is provided. Is formed. Filling member 2 1 is fixed to the side surface of beam 1 2 by fixing metal fittings 2 3 such as Nevis, etc. Filling member 2 1 is finished into a substantially rectangular shape by bending a thin metal profile. A hollow space 22 in which the powder 14 can be filled is formed in the container. Further, the granular material 14 is enclosed in the hollow space 2 2 until reaching a predetermined height. The material of the filling member 21 is not limited to steel, and may be composed of any other material including plastic.

In the vibration-damping floor structure 2 having such a structure, the hollow space 2 2 formed in the filling member 2 1 can be easily filled with the powder 14 having excellent fluidity. It is possible to reduce the labor and costs associated with filling. Even if the granular material 1 4 is filled in the external filling member 2 1 with respect to the beam 1 2 like the damping floor structure 2 without filling the inside of the beam 1 2, the beam 1 2 In response to this vibration, the filling member 21 also vibrates in the same manner, and further, the granular material 14 filled therein can be vibrated. As a result, part of the vibration energy that vibrates the beam 12 is absorbed as energy for vibrating the granular material 14, and the vibration transmitted to the lower floor side can be suppressed.

By the way, the position of the filling member 2 1 is not limited to the side of the beam 1 2, and it is placed at any place on the joist if there is a floor structure beam 1 2, floor 1 1, or joists. Alternatively, in the case of a floor structure in which the floor is a panel, it may be arranged on this.

The present invention may also be applied to a vibration-damping floor structure 3 in which a plurality of joists crossing the beam are provided. In this damping floor structure 3, the same components and members as those of the above-described damping floor structure 1 are given the same numbers and the description thereof is omitted.

As shown in Fig. 12 for example, the damping floor structure 3 is provided with a plurality of joists 3 3 intersecting with the beams 39 as H-shaped steel, on the joists 39, and above the joists 33. The floorboard 1 1 is attached to the floor. In this vibration-damping floor structure 3, fixing brackets 31 for connecting the ends of the joists 3 3 are provided on the beams 39 at predetermined intervals, and the hollow spaces 7 3 are provided inside the joists 3 3. In this hollow space 7 3, the granular material 14 is enclosed.

Neta 3 3 plays a role as a frame member of the building structure, like Beam 3 9. The joists 33 are formed by, for example, being bonded to the floor plate 11 in parallel over a plurality of pieces and joined by drill screws (not shown), and further bridged between the beams 39. Is done. Against floorboard 1 1 When an impact from walking or work is applied, vibration is generated. The vibration first propagates to the joist 3 3, and further propagates to the beam 3 9 through the joist 3 3.

In the hollow space 73, the granular material 14 is enclosed up to a predetermined height, and the granular material is leveled based on the self-leveling effect.

For example, as shown in Fig. 13, Fig. 14 (a), Fig. 14 (b), the fixing bracket 3 1 is formed by bending a thin steel plate so that it has a U-shaped cross section. A through hole 5 1 is formed. Further, the vibration absorbing material 6 1 is inserted into the through hole 5 1 of the fixing bracket 3 1, and the vibration absorbing material 5 is interposed between the inner bottom surface 3 1 a and the joist 3 3 of the fixing bracket 3 1. 2 is interposed. Further, in order to support the end of the joist 3 3, the fastening screw 4 5 is inserted into the joist 3 3 while passing through the vibration absorbing material 61. In addition, for example, as shown in Fig. 14 (a), when the beam 3 9 is made of an H-shaped steel material, the fixing bracket 3 1 is connected to the bolt 5 through the through hole 5 4 provided in the beam 3 9. 5 and nuts 56.

The vibration absorbers 5 2 and 6 1 are made of, for example, a urethane rubber member. However, this may be replaced with any other elastic member, or a viscoelastic member may be replaced with this. Good. The vibration absorbing material 5 2 can absorb the impact vibration propagated from the floor board 1 1 through the joist 3 3, and the shock generated on the floor board 11 located immediately above the fixing bracket 3 1. The vibration can be similarly absorbed. In other words, by arranging this vibration absorber 5 2, it is possible to absorb the vibration propagating to the fixing bracket 3 1 at a stretch, and to greatly attenuate the vibration transmitted to the beam 39. Become. If the vibration propagating to beam 39 can be reduced, the sound of solid propagation propagating to the lower floor via beam 39 will be reduced. In addition to the above-mentioned improvement of vibration control performance, weight impact sound represented by falling sounds of heavy objects, light impact sound represented by falling sounds of spoons and chair dragging sounds, etc. Sound insulation can be effectively performed.

Similarly, the vibration absorber 6 1 can absorb vibration transmitted to the joists 3 3, and can promote the sound insulation effect by the vibration absorbers 5 2. Even when horizontal vibration based on the above is applied, this can be absorbed efficiently. In addition, it may be installed between the joist 3 3 and the floor in place of the vibration absorbing materials 5 2 and 6 1 shown in FIGS. 14 (a) and 14 (b). That is, in this damping floor structure 3, the light impact sound can be insulated by vibrating the granular material 14 as described above, and the heavy weight impact sound is vibration-absorbing material o 2 6 1. By providing

This can be effectively insulated. This vibration-damping floor structure 3 is installed in a building structure that can generate both light impact and heavy impact sounds, and can be sound-insulated based on different mechanisms. It is valid.

The damping floor structure 3 is not limited to the embodiment described above. For example, as shown in FIG. 15, the vibration absorbing material 6 1 may be directly interposed between the beam 3 9 and the joist 3 3 intersecting the beam 3 9 by omitting the fixing bracket 3 1. . In such a configuration, the vibration absorber 6 1 is, for example, a fixing hardware that is folded into an S shape.

8 1 may be fixed to beam 39. That is

In the configuration shown in FIG. 15, even when the configuration of the fixing metal 3 1 is omitted, the weight impact sound can be similarly absorbed, and the cost for preparing the fixing bracket 3 1 can be obtained. This is effective for i¾, which can eliminate drought and labor. Note that the vibration absorber 6 1 shown in Fig. 15 is changed to the position of the joist 3 3 and the floor, or the joist 3 3 and beam May be installed between 3 and 9.

Also, in the above-mentioned vibration-damping floor structure 3, instead of injecting the granular material 14 into the hollow space provided inside the joists 33, externally attached to the side surfaces of the beams 39 and joists 33 A filling member 7 6 may be provided, and the granular material 1 4 may be injected into the filling member 7 6.

Fig. 16 (a) is a front view of the configuration in which the filling member 7 6 a is disposed on the side surface of the joist 33, and Fig. 16 (b) shows its A—A 'cross-sectional view. ing. The filling member 76a is formed in a quadrangular prism shape, and is arranged so that its longitudinal direction coincides with the direction in which the beams 39 and joists 33 extend.

The height of the filling member 7 6 a may be adjusted to be substantially the same as the height of the beams 3 9 and joists 33, and may be arranged on both sides of the joists 33, You may make it arrange | position on either one side. Further, the filling member 76a may be formed so as to taper toward the tip as shown in FIG. 16 (a), for example.

Fig. 17 (a) is a front view in a configuration in which the longitudinal direction of the filling member 76 b is perpendicular to the joist 33, and Fig. 17 (b) is a sectional view thereof. Show. In such a configuration, the filling member 7 6 b is disposed so as to connect the joists 3 3 to each other.

This damping floor structure 3 is also provided with an external filling member 7 6, so that, in the same way as the damping floor structure 2, the filling member according to the vibration propagated to the joist 3 3 through the floor plate 1 1. 7 6 can also be vibrated in the same manner, and furthermore, since the granular material 14 filled therein can be vibrated, the damping performance can be improved and the weight can be improved. In addition to the impact sound, it is possible to insulate especially the light impact sound.

Further, when the elastic modulus is remarkably different between the beam 3 9 and the joist 3 3, the arrangement position of the filling member 76 is determined based on the difference in elastic modulus. In this way fc is good.

For example, as shown in Fig. 18, when an impact is applied to the floor plate 1 1 on the joist 3 3, which is fastened directly above the beam 3 9, in the beam 3 9 and joist 3 3 that are orthogonal to each other, the beam 3 9 Will be responsible for the vibration associated with the impact. As a result, the beam 39 will vibrate more strongly than the joists 33. -5)

For this reason, as shown in Fig. 1 8, by placing the filling member 7 6 along the beam 3 9, it is possible to directly absorb the impact transmitted to the beam 3 9, and to absorb the vibration of the beam 3 9. It can be attenuated.

The vibration-damping floor structure 13 to which the present invention is applied is not limited to the case where it is disposed in a building structure, but may be disposed in any ship, vehicle, or the like. Of course

Incidentally, in the above example, when molten metal is used as the granular material 14, the bulk specific gravity can be configured to be 3.0 4.0 t / m ³ . Performance and sound insulation performance can be improved, and since molten metal can be used as this powder, it is possible to reduce production costs.

Industrial applicability

In the vibration-damping floor structure according to the present invention, the fluidity of the powder and granular material can be increased, so that the ease of filling the hollow space can be improved. Moreover, in the vibration-damping floor structure to which the present invention is applied, it is possible to improve the vibration-damping performance, and as a result, it is possible to effectively insulate lightweight impact sound. Further, in addition to the above-described effects, the vibration-damping floor structure according to the present invention can also effectively insulate a heavy impact sound. Further, in the vibration-damping floor structure according to the present invention, it is possible to increase the bulk density of the granular material to about 2.0 t / m ³ heavier than before, and the vibration damping performance and sound insulation performance. Can be improved, and Since the molten metal can be used as the granular material, the production cost can be reduced.

Claims

1. In a vibration-damping floor structure consisting of at least a floor and a beam, a hollow space into which the granular material is inserted is formed inside the beam, and the granular material consists of Fe, C a O, S i ○ Damping floor structure characterized by including ₂ .

2. A floor structure consisting of at least a floorboard and a beam supporting it,

A filling space disposed in the floor structure, wherein the filling member is formed with a hollow space into which the granular material is inserted, and the granular material includes Fe, C aO, and S i 0 ₂ . Damping floor structure characterized by including.

3. the powder particle body, damping floor structure according to claim 1 or 2, characterized in that S i 〇 ₂ is formed by deposition on the surface. Surrounding

4. The above granular material is composed of components with C aO of 50 wt% or less, Fe force s 15 5 wt% or more, S i 0 ₂ of 9 wt% or more, and 0.05 mm The vibration-damping floor structure according to claim 3, wherein the vibration-damping floor structure is constituted by a particle diameter of ˜5.0 mm.

5. The vibration-damping floor structure according to claim 3 or 4, wherein the granular material is a crushed slag.

6. The damping floor structure according to any one of claims 3 to 5, wherein the granular material has an angle of repose of 0 ° to 12 °.

7. The above powder and granule consists of 85 wt% to 90 wt% of metal and 15 wt% to 10 wt% of slag, except for the total weight of metal above, excluding moisture. Fe is contained in an amount of 80 wt% or more, CaO is contained in an amount of 30 wt% to 40 wt%, and S i 0 ₂ is contained in an amount of 30 wt% to 40 wt% with respect to the total weight of the slag. A vibration-damping floor structure according to claim 1 or 2, wherein

8. The damping floor structure according to claim 7, wherein the granular material has a bulk specific gravity of 3.0 to 4.0 t / m ³ .

9. The vibration-damping floor structure according to claim 7 or 8, wherein the granular material is a molten metal.

10. A plurality of joists crossing the beam are provided on the beam, the floor board is mounted on the joist, and an elastic member or a viscoelastic member is provided between the beam and the floor board. The vibration-damping floor structure according to any one of claims 1 to 9, characterized in that an intervening material is interposed.

1 1. A fixing bracket for connecting the ends of a plurality of joists crossing the beam is provided on the beam, and the floor board is mounted on the joists. The damping floor structure according to any one of claims 1 to 9, wherein an elastic member or a viscoelastic member is interposed between the floor board and the joist.