JPH02272138A - Soundproof floor - Google Patents
Soundproof floorInfo
- Publication number
- JPH02272138A JPH02272138A JP9397389A JP9397389A JPH02272138A JP H02272138 A JPH02272138 A JP H02272138A JP 9397389 A JP9397389 A JP 9397389A JP 9397389 A JP9397389 A JP 9397389A JP H02272138 A JPH02272138 A JP H02272138A
- Authority
- JP
- Japan
- Prior art keywords
- floor
- slab
- vibration
- space
- elastic body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006096 absorbing agent Substances 0.000 claims abstract description 18
- 239000004567 concrete Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 230000005284 excitation Effects 0.000 description 6
- 238000007667 floating Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 etc.) Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000006870 ms-medium Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Landscapes
- Floor Finish (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、建築において、建物内居室上下間（昇圧）に
係わる床衝撃音を軽減させるための装置を設けた防音床
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a soundproof floor provided with a device for reducing floor impact noise related to the space between the upper and lower floors (pressurization) in a building in architecture.
従来、床衝撃音を軽減させる目的で、建物胴体の床スラ
ブ（以降「スラブ」と省略）の上に防振支持された浮き
床を施工する様々な防音床工法が試みられており、いず
れも軽量衝撃源による中・高音域に床衝撃音に対しては
有効であるが、重量衝撃源による低音域の床衝撃音にた
いしては充分な効果が得られていない。その原因は、低
音域の床衝撃音が主として重量衝撃源によって励振され
るスラブの低次の振動モートに起因して発生するからで
、従来の浮き床による防音床工法はこの振動モートに対
してほとんど無効だったからである。このスラブの振動
モードを対象にした床衝撃音軽減対策としては、従来ス
ラブの開性を強化するため、スラブの厚みを増したり、
小梁の数を増やしたり、あるいは中空スラブやリブ付き
スラブを用いたりする方法がとられていた。In the past, various soundproof floor construction methods have been attempted in which a floating floor with anti-vibration support is constructed on top of the floor slab (hereinafter abbreviated as "slab") of the building body in order to reduce floor impact noise. Although it is effective against floor impact sounds in the medium and high ranges caused by lightweight impact sources, it is not sufficiently effective against floor impact sounds in the low range range caused by heavy impact sources. The reason for this is that floor impact noise in the low frequency range is mainly caused by the low-order vibration motes of the slab excited by the weight impact source, and conventional soundproof floor construction methods using floating floors are designed to reduce the vibration motes. This is because it was almost ineffective. Conventional measures to reduce floor impact noise targeting this slab vibration mode include increasing the thickness of the slab in order to strengthen the openness of the slab.
The methods used were to increase the number of beams, or to use hollow or ribbed slabs.
しかるに、これらの方法で有意な効果を得るにはいｒれ
もスラブ単位面積当り重量のかなりの増加を伴った。こ
の重量増加は直ちに建物躯体構造に影古を及ぼして建物
全体の重量増加と費用上昇を招き、特に事後対策では対
処困難な場合が多い。However, achieving any significant effect with these methods was accompanied by a significant increase in the weight per unit area of the slab. This increase in weight immediately affects the building frame structure, leading to an increase in the weight of the entire building and an increase in costs, which is often difficult to deal with, especially with post-event measures.
本発明は、上述のような問題点を解決すること′を目的
としたものである。The present invention aims to solve the above-mentioned problems.
本発明は、前記の目的を達成するため、スラブ上に添加
荷重とばねおよび抵抗の要素を持った板状弾性体との組
合せからなる動吸振器を設置し、その制振作用を応用す
るようにしたものである。In order to achieve the above object, the present invention installs a dynamic vibration absorber consisting of a combination of an added load and a plate-like elastic body having spring and resistance elements on a slab, and applies its vibration damping effect. This is what I did.
この場合、もしスラブ単体上に動吸振器を設置すれば、
これが邪魔になって居室の床としての機能を阻害するこ
とになる。In this case, if a dynamic vibration absorber is installed on a single slab,
This becomes a nuisance and impedes its function as a living room floor.
本発明は、この様な問題点も合わせて解決するため、ス
ラブ上に空間をとって支持されるようにした上部床を設
け、その床下空間のスラブ上に動吸振器を設置するよう
にした。なお、この上部床は防振ゴム等を介して防振支
持された浮き床であればさらによい。In order to solve these problems, the present invention provides an upper floor that is supported with a space above the slab, and a dynamic vibration absorber is installed on the slab in the space under the floor. . It is further preferable that this upper floor be a floating floor that is vibration-proof and supported via vibration-proof rubber or the like.
動吸振器をある共振系に添加した場合の制振作用は、動
吸振器がある質点系の共振に対し***振するように働き
、ある共振系の共振時におムノるインピーダンス低下を
抑制するからである。The damping effect when a dynamic vibration absorber is added to a certain resonant system is that the dynamic vibration absorber works to anti-resonate with respect to the resonance of a certain mass point system, and suppresses the impedance drop that occurs when a certain resonant system resonates. It is.
本発明は、この作用をスラブの振動モートの共振時にお
けるインピーダンス低下を押えるのに応用した。The present invention applies this effect to suppressing the drop in impedance during resonance of the vibration mote of the slab.
すなわち、スラブは大局的に無限大インピーダンスに連
結された等画質量Ｍｓ、等価ばね定数Ｋｓ、等価抵抗Ｒ
ｓの要素からなる直列回路とのなせるので、そのインピ
ーダンスＺｓは（１）式の共振固有振動数ｆｓて極小と
なる。That is, the slab globally has an equal image mass Ms, an equivalent spring constant Ks, and an equivalent resistance R connected to infinite impedance.
Since it can be formed with a series circuit consisting of elements of s, its impedance Zs becomes a minimum of the resonant natural frequency fs of equation (1).
ｆｓ−（１／２π） ・ｌｚ Ｋｓ／Ｍｓ 中・・（
１）一方、動吸振器は旧に連結された質量間、ばね定数
Ｋｄ、抵抗＋１ｃｌの要素からなる並列回路とめなせる
ので、そのインピーダンスＺｄは（２）式の***振固有
振動数ｆｄで極大となる。fs-(1/2π) ・lz Ks/Ms Medium...(
1) On the other hand, the dynamic vibration absorber can be regarded as a parallel circuit consisting of previously connected masses, spring constant Kd, and resistance + 1cl, so its impedance Zd is maximum at the anti-resonant natural frequency fd of equation (2). becomes.
ｆｄ＝（１／２π）・ｌｚ［ヲ可「９．・・・（２）従
って、ｆｄ＝ｆｓとなるように動吸振器の要素を調整す
れば、動吸振器が設置されたスラブのインピーダンス（
Ｚｓ ＋Ｚｄ）は、共振固有振動数ｆｓにおいてＺｓ＜
＜Ｚｓ＋Ｚｄとすることができ、結果的にスラブの振動
が押えられ、そのスラブから放射される音も押えられる
ことになる。fd=(1/2π)・lz[ヲpossible"9....(2) Therefore, if the elements of the dynamic vibration absorber are adjusted so that fd=fs, the impedance of the slab on which the dynamic vibration absorber is installed (
Zs + Zd) is Zs<
<Zs+Zd, and as a result, the vibration of the slab is suppressed, and the sound radiated from the slab is also suppressed.
さらに、本発明は動吸振器が居室の床として邪魔になら
ないよう、スラブの上に空間をとって支持された上部床
の床下に設置するようにした。Further, in the present invention, the dynamic vibration absorber is installed under the upper floor supported above the slab with a space so that it does not interfere with the floor of the living room.
［実 施 例］
以下、図面に基づいて本発明の実施例を詳細に説明する
。[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.
第１図は本発明を鉄筋コンクリート構造の建物の浮き床
下に応用した例で、１はスラブ、２はスラブ１と結合す
るとともにスラブ１を支える躯体の梁または壁、３は床
下空間６を持った上部床の床板で、根太４ａ、４ｂ及び
防振ゴム台５によってスラブ上に支えられている。Figure 1 shows an example in which the present invention is applied under a floating floor of a building with a reinforced concrete structure, where 1 is a slab, 2 is a beam or wall of the frame that is connected to the slab 1 and supports the slab 1, and 3 has an underfloor space 6. The floorboard of the upper floor is supported on the slab by joists 4a, 4b and a vibration-proof rubber stand 5.
この状態で、今、床板３の上を人が飛び跳ねたりすると
、その衝撃加振力９は床板３に加わり、さらに根太４ａ
、４ｂ、防振ゴム台５、床下空間６を介してスラブ１へ
伝わる。この時加振力は一般に幅広い振動パヮースペク
］・ラムを持っているため、スラブ１の共振固有振動数
ｆｓを励振し、ｆｓを主成分とする放射音１０を階下に
放出して不快感を与える。In this state, if a person jumps on the floorboard 3, the impact excitation force 9 will be applied to the floorboard 3, and the joists 4a
, 4b, is transmitted to the slab 1 via the vibration-proof rubber stand 5 and the underfloor space 6. At this time, since the excitation force generally has a wide range of vibration power spectrum], it excites the resonant natural frequency fs of the slab 1, and emits radiated sound 10 whose main component is fs to the downstairs, causing discomfort. .
動吸振器はこの放射音１０を軽減さ−Ｕ゛る作用を持ち
、図の添加荷重７と、ばねと抵抗の要素を持つ板状弾性
体８によって構成される。添加荷重７は質量Ｍｄを提供
するもので剛性の高い材料が望ましく、コンクリートブ
ロックや鋼材片等が適当である。板状弾性体８は適当な
ばね定数Ｋｄと抵抗Ｒｄとを提供すると共に添加荷重７
を支えるべく添加荷重７とスラブ１との間に敷かれるも
ので、無機質繊維（グラスウール、ロックウール等）、
有機質繊維（獣毛、植物繊維、化学繊維等）、コルク、
軟質樹脂（ゴム等）、および軟質発泡樹脂（スポンジ等
）等を板状に加工し７たものが適当である。板状弾性体
８は添加荷重７の底面の全面に敷いてもよく。その断片
を間隔をあけて敷いてもよい。この動吸振器の取付は箇
所は、なるべくスラブ１の共振固有振動数ｆｓの振動モ
ードの腹の位置が有効である。The dynamic vibration absorber has the effect of reducing this radiated sound 10, and is composed of an additional load 7 shown in the figure and a plate-like elastic body 8 having spring and resistance elements. The additional load 7 provides mass Md, and is preferably made of a highly rigid material, such as a concrete block or a steel piece. The plate-like elastic body 8 provides an appropriate spring constant Kd and resistance Rd, and also provides an additional load 7.
It is laid between the additional load 7 and the slab 1 to support the
Organic fibers (animal hair, vegetable fibers, chemical fibers, etc.), cork,
Suitable materials are those processed into a plate shape from soft resin (such as rubber) or soft foamed resin (such as sponge). The plate-shaped elastic body 8 may be placed on the entire bottom surface of the additional load 7. The pieces may be placed at intervals. The effective location for mounting this dynamic vibration absorber is preferably at the antinode of the vibration mode of the resonance natural frequency fs of the slab 1.
このように動吸振器を取付けることにより、衝撃加振力
９て加振された浮き床の床板３がら根太４ａ、４ｂおよ
び床下空間６を介してスラブ１へ伝わる加振力は作用の
項で述べた作用によって制御されるので、スラブ１より
放出される放射音１０は軽減されたものとなる。By installing the dynamic vibration absorber in this way, the excitation force transmitted from the floorboard 3 of the floating floor, which is excited by the impact excitation force 9, to the slab 1 via the joists 4a, 4b and the underfloor space 6 can be reduced in terms of action. Since it is controlled by the described effect, the radiated sound 10 emitted from the slab 1 is reduced.
本発明は、スラブとの間に空間を持つ上部床の床下に動
吸振器を設置するのみでスラブに係る振動を制御し、床
衝撃音を軽減させることができる。また、動吸振器は床
下空間に設置されるので、目ざわりになったり邪魔にな
ったりすることがない。The present invention can control the vibration related to the slab and reduce floor impact noise by simply installing a dynamic vibration absorber under the floor of the upper floor that has a space between it and the slab. Furthermore, since the dynamic vibration absorber is installed in the underfloor space, it does not become a nuisance or get in the way.
本発明は、単に床衝撃音のみならず、スラブに伝わる床
衝撃加振力以外の外来振動によるスラブの振動も制御す
ることができるので、その外来振動によって上下の居住
者や精密機械等に悪影響を及ぼす振動や放射音を軽減さ
せることができる。The present invention can control not only floor impact noise but also slab vibration caused by external vibration other than the floor impact excitation force transmitted to the slab, so the external vibration has an adverse effect on occupants above and below, precision machinery, etc. It is possible to reduce vibrations and radiated sound.
本発明は、スラブに与える重量増加がおおむね動吸振器
の添加荷重のみなので軽微であり、従来のスラブの振動
制御法のように躾体構造に荷重負担をかｉノることがな
く、また対象とするスラブの固有振動数に直接効果的に
作用するので、簡単・低順かつ高性能である。According to the present invention, the increase in weight given to the slab is minimal since it is mostly the added load of the dynamic vibration absorber, and unlike conventional slab vibration control methods, there is no load burden on the support structure. Since it directly and effectively acts on the natural frequency of the slab, it is simple, low-order, and high-performance.
本発明における上部床は、その支持部に防振ゴム等を挿
入して浮き床とすれば、床衝撃音および外来振動に対す
る防音・防振をさらに向上させることができる。If the upper floor in the present invention is made into a floating floor by inserting vibration-proofing rubber or the like into its supporting portion, the soundproofing and vibration-proofing against floor impact noise and external vibration can be further improved.
第１図及び第２図は本発明の実施例を示したもので、第
１図は一部を割截した防音床の平面図、第２図は第１図
に於けるＡ−Ａ断面図である。
１・・・スラブ、２・・・梁または壁、３・・・上部床
の床板、４ａ・・・根太（支点間用）、
４ｂ・・・根太（結合用）、５・・・防振ゴム台、６・
・・床下空間、７・・・添加荷重、８・・・板状弾性体
、９・・・衝撃加振力、１０・・・放射音。Fig. 1 and Fig. 2 show an embodiment of the present invention, Fig. 1 is a partially cutaway plan view of a soundproof floor, and Fig. 2 is a sectional view taken along line AA in Fig. 1. It is. 1... Slab, 2... Beam or wall, 3... Upper floor board, 4a... Joist (for between supports), 4b... Joist (for connection), 5... Vibration isolation Rubber stand, 6.
...Underfloor space, 7.Additional load, 8.Plate-shaped elastic body, 9.Impact excitation force, 10.Radiated sound.
Claims (1)
け、その床下空間の床スラブ上に、床スラブの固有振動
数と整合させるように調整した、添加荷重とばねおよび
抵抗の要素を持った板状弾性体との組合せからなる動吸
振器を設置したことを特徴とする防音床。(1) An upper floor with a space above the floor slab of the building frame is provided, and additional loads, springs, and resistance elements are placed on the floor slab in the space under the floor to match the natural frequency of the floor slab. A soundproof floor characterized in that a dynamic vibration absorber is installed in combination with a plate-like elastic body having .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9397389A JPH02272138A (en) | 1989-04-13 | 1989-04-13 | Soundproof floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9397389A JPH02272138A (en) | 1989-04-13 | 1989-04-13 | Soundproof floor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02272138A true JPH02272138A (en) | 1990-11-06 |
Family
ID=14097346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9397389A Pending JPH02272138A (en) | 1989-04-13 | 1989-04-13 | Soundproof floor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02272138A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03176559A (en) * | 1989-12-04 | 1991-07-31 | Daiken Trade & Ind Co Ltd | Sound insulating double floor structure |
| JP2007138421A (en) * | 2005-11-15 | 2007-06-07 | Bridgestone Corp | Floor structure |
| JP2008095397A (en) * | 2006-10-12 | 2008-04-24 | Bridgestone Corp | Floor structure |
| KR101683055B1 (en) * | 2015-09-03 | 2016-12-06 | 삼성물산 주식회사 | Floor slab with absorbing part for impact sound |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6055641B2 (en) * | 1978-01-23 | 1985-12-06 | 日本道路公団 | Temporary road formation method on expressways, etc. |
| JPS62170658A (en) * | 1986-01-23 | 1987-07-27 | 鹿島建設株式会社 | Vibration controller of building body |
-
1989
- 1989-04-13 JP JP9397389A patent/JPH02272138A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6055641B2 (en) * | 1978-01-23 | 1985-12-06 | 日本道路公団 | Temporary road formation method on expressways, etc. |
| JPS62170658A (en) * | 1986-01-23 | 1987-07-27 | 鹿島建設株式会社 | Vibration controller of building body |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03176559A (en) * | 1989-12-04 | 1991-07-31 | Daiken Trade & Ind Co Ltd | Sound insulating double floor structure |
| JP2007138421A (en) * | 2005-11-15 | 2007-06-07 | Bridgestone Corp | Floor structure |
| JP2008095397A (en) * | 2006-10-12 | 2008-04-24 | Bridgestone Corp | Floor structure |
| KR101683055B1 (en) * | 2015-09-03 | 2016-12-06 | 삼성물산 주식회사 | Floor slab with absorbing part for impact sound |
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