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JP3741702B2 - Floor impact sound level analysis method - Google Patents
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JP3741702B2 - Floor impact sound level analysis method - Google Patents

Floor impact sound level analysis method Download PDF

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JP3741702B2
JP3741702B2 JP2003385709A JP2003385709A JP3741702B2 JP 3741702 B2 JP3741702 B2 JP 3741702B2 JP 2003385709 A JP2003385709 A JP 2003385709A JP 2003385709 A JP2003385709 A JP 2003385709A JP 3741702 B2 JP3741702 B2 JP 3741702B2
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impedance
impact sound
sound level
floor
floor impact
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邦彦 荒木
千絵 安井
敏郎 松本
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Takenaka Corp
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Description

本発明は、例えば、集合住宅等における床スラブを通して下方へ伝わる床衝撃音のレベルを解析する方法に関し、更に詳しくは、床スラブの基本インピーダンスにインピーダンス補正を行って実態インピーダンスを求め、その実態インピーダンスを用いて床衝撃音レベルを求める床衝撃音レベル解析方法に関する。   The present invention relates to a method of analyzing the level of floor impact sound transmitted downward through a floor slab in an apartment house, for example, and more specifically, obtains an actual impedance by performing impedance correction on the basic impedance of the floor slab, and the actual impedance The present invention relates to a floor impact sound level analysis method for obtaining a floor impact sound level by using.

従来、この種の床衝撃音レベル解析方法としては、1988年に日本建築学会から「インピーダンス法に基づく床衝撃音レベルの実用的予測手法」として提案されたもの(例えば、非特許文献1参照)があり、これによると、スラブ加振点の基本インピーダンスは、対象を無限大の床板と見なして求めたインピーダンスを基本として、数1の式(1)にて与えられる。この式の右辺第二項、第三項によって位置によるインピーダンス分布を算定し、床衝撃音を予測するものである。   Conventionally, as this kind of floor impact sound level analysis method, a method proposed by the Architectural Institute of Japan in 1988 as “practical prediction method of floor impact sound level based on the impedance method” (for example, see Non-Patent Document 1). According to this, the basic impedance of the slab excitation point is given by Equation (1) based on the impedance obtained by regarding the object as an infinite floor board. The impedance distribution according to the position is calculated by the second term and the third term on the right side of this equation, and the floor impact sound is predicted.

Figure 0003741702
Figure 0003741702

そして、スラブ端部の固定状況によるインピーダンス変化量に関しては、スラブ周辺固定状況として大梁で固定されている場合と、小梁で固定されている場合との二通りの解析モデルについてインピーダンス変化量が設定されている。
また、この場合の数値設定は、対象床スラブ面積が10〜30m2程度までの建物を対象にして得られた実測データを基にして実施されている。
また、上述の衝撃音レベル解析方法に対して、更に床仕上げによるインピーダンス増加量を見込んで解析するもの(例えば、特許文献1参照)もあった。
And, regarding the amount of impedance change due to the fixed state of the slab end, the amount of impedance change is set for two types of analysis models, the case where the slab periphery is fixed with a large beam and the case where it is fixed with a small beam Has been.
Moreover, the numerical setting in this case is carried out based on actually measured data obtained for a building having a target floor slab area of about 10 to 30 m 2 .
In addition to the above-described impact sound level analysis method, there is also one that analyzes in consideration of the amount of impedance increase due to floor finishing (for example, see Patent Document 1).

特開2002−296102号公報JP 2002-296102 A 日本建築学会編「建築物の遮音設計資料(1988)」(技報堂出版)The Architectural Institute of Japan "Sound insulation design material for buildings (1988)" (Gihodo Publishing)

上述した従来の床衝撃音レベル解析方法によれば、解析対象の建物が、解析モデルの建物と似た条件の場合は、精度良く床衝撃音レベルを解析することができるものの、解析モデルの建物と条件が異なるような場合、解析精度が低くなる傾向が見られる。
そもそも、建物構造には、床スラブが大梁・小梁で支持されている一般的なものの他、束柱や壁等で支持される構造や、床スラブ周辺固定部に位置する壁に大きな開口がある構造等、さまざまな支持形態が存在し、更には、対象建物部の面積も、30m2を超える場合が多い。
このように、従来の床衝撃音レベル解析方法によれば、解析モデルが実情に合い難いことから、解析精度のバラツキが大きくなり易い問題点がある。
これは、図8に示すように、従来の床衝撃音レベル解析方法によって求めた床衝撃音レベルの解析値と、実測によって得られた床衝撃音レベルの実測値との比較結果にも顕著に現れている。即ち、従来法によって求めた床衝撃音レベルを基に建物を建設すると、目標とする床衝撃音レベルよりも小さな実測値となり、静寂感は高いものの、例えば、床スラブ厚が必要以上の値になり、過大設計によりコストアップにつながり易い。
According to the conventional floor impact sound level analysis method described above, the floor impact sound level can be analyzed with high accuracy when the analysis target building has similar conditions to the analysis model building. If the conditions are different, the analysis accuracy tends to be low.
In the first place, the building structure has a general structure in which the floor slab is supported by large beams and small beams, as well as a structure that is supported by bundle pillars and walls, etc., and a large opening in the wall located at the fixed part around the floor slab. There are various support forms such as a certain structure, and the area of the target building part often exceeds 30 m 2 .
As described above, according to the conventional floor impact sound level analysis method, since the analysis model is difficult to match the actual situation, there is a problem that the variation in analysis accuracy tends to increase.
As shown in FIG. 8, this is conspicuous in the comparison result between the analysis value of the floor impact sound level obtained by the conventional floor impact sound level analysis method and the measured value of the floor impact sound level obtained by actual measurement. Appears. That is, when a building is constructed based on the floor impact sound level obtained by the conventional method, the actual measured value is smaller than the target floor impact sound level, and although the sense of silence is high, for example, the floor slab thickness is more than necessary. Therefore, it is easy to lead to cost increase by excessive design.

従って、本発明の目的は、上記問題点を解消し、床スラブの各種支持構造に対応できて、精度の良い解析結果が得られる床衝撃音レベル解析方法を提供するところにある。   Accordingly, an object of the present invention is to provide a floor impact sound level analysis method capable of solving the above-described problems and corresponding to various support structures of a floor slab and obtaining an accurate analysis result.

本発明の第1の特徴構成は、床スラブの基本インピーダンスにインピーダンス補正を行って実態インピーダンスを求め、その実態インピーダンスを用いて床衝撃音レベルを求める床衝撃音レベル解析方法において、前記インピーダンス補正を行うに当たって、解析対象建物部に束柱が存在しない場合と、存在する場合とに分けて、束柱が存在しない場合には、スラブ周辺固定状況によるインピーダンス変化量、及び、固有振動数によるインピーダンス変化量を加味してインピーダンス補正を行い、束柱が存在する場合には、更に、束柱の存在によるインピーダンス変化量をも加味してインピーダンス補正を行うところにある。   According to a first characteristic configuration of the present invention, in the floor impact sound level analysis method for obtaining an actual impedance by performing impedance correction on the basic impedance of the floor slab, and obtaining the floor impact sound level using the actual impedance, the impedance correction is performed. In doing so, if there is no bundle pillar in the building part to be analyzed, and if there is no bundle pillar, if there is no bundle pillar, the amount of impedance change due to the slab periphery fixed state, and the impedance change due to the natural frequency The impedance correction is performed with the amount taken into account, and when the bundle column exists, the impedance correction is performed with the amount of impedance change due to the presence of the bundle column added.

本発明の第1の特徴構成によれば、解析対象建物部での束柱の有無を考慮してインピーダンス補正を行うから、従来の方法に比べて、より精度良く床衝撃音レベルを求めることができる。
即ち、床スラブのインピーダンス変化量に影響を与える要因として、スラブ周辺固定状況、及び、スラブの固有振動数による共振に加えて、束柱の有無と言う新しい要因を加味して解析することによって、従来であれば、束柱が存在しているにも拘わらず、その存在を解析に反映させることができなかったが為に解析精度が悪くなると言った問題を、大きく改善でき、より精度良く衝撃音レベルを求めることが可能となった。
従って、実情によく合致した衝撃音レベルの解析を行えるようになって、過大設計となるのを防止して、無駄を減らすことができ、より経済的な建物建設を叶えることが可能となる。
尚、束柱は、その存在によって、インピーダンスへの影響を及ぼすことが発明者によって確認されている。
According to the first characteristic configuration of the present invention, since the impedance correction is performed in consideration of the presence or absence of the bundle pillars in the building to be analyzed, the floor impact sound level can be obtained more accurately than in the conventional method. it can.
That is, as a factor affecting the impedance change amount of the floor slab, in addition to the slab peripheral fixation status and resonance due to the natural frequency of the slab, by analyzing the new factor such as the presence or absence of a bundle column, Conventionally, the problem that the analysis accuracy deteriorates because the presence of the bundle pillars could not be reflected in the analysis even though they existed can be greatly improved, and the impact can be improved with higher accuracy. The sound level can be determined.
Therefore, it becomes possible to analyze an impact sound level that closely matches the actual situation, prevent an overdesign, reduce waste, and achieve more economical building construction.
In addition, it has been confirmed by the inventor that the bundle pillar has an influence on the impedance due to its presence.

本発明の第2の特徴構成は、前記スラブ周辺固定状況によるインピーダンス変化量は、解析対象建物部の床スラブ端部の壁に大きな開口が無い場合と、前記床スラブ端部の壁に大きな開口があり且つ構造部材が存在する場合と、前記床スラブ端部の壁に大きな開口があり且つ構造部材が存在しない場合とに分けて求めるところにある。   According to a second characteristic configuration of the present invention, the amount of impedance change due to the slab periphery fixing state is such that there is no large opening in the wall of the floor slab end of the building part to be analyzed, and a large opening in the wall of the floor slab end. And there is a structural member and a case where there is a large opening in the wall at the end of the floor slab and there is no structural member.

本発明の第2の特徴構成によれば、本発明の第1の特徴構成による上述の作用効果を叶えることができるのに加えて、スラブ周辺固定状況として大梁、又は、小梁で支持されている事だけを考慮するのに比べて、肌理の細かな解析が可能となり、より現状に近い衝撃音レベルを求めることができるようになる。
因みに、解析対象建物部の床スラブ端部の壁に大きな開口が無い場合とは、壁が湿式の戸境壁である場合や、湿式の外壁で開口部が、例えば30%以下程度のものを例として挙げることができる。
また、前記床スラブ端部の壁に大きな開口があり且つ構造部材が存在する場合とは、梁を有する乾式戸境壁である場合や、湿式壁で梁などの構造部材があるが、大きな開口部(例えば掃出窓等)があるものを例として挙げることができる。
また、前記床スラブ端部の壁に大きな開口があり且つ構造部材が存在しない場合とは、大きな開口部(例えば掃出窓等)があり、梁などの構造部材がないもので、具体例を挙げれば、ハイサッシを有するフラットスラブ端部のようなものが対象となる。
According to the second characteristic configuration of the present invention, in addition to being able to achieve the above-described operational effects according to the first characteristic configuration of the present invention, the slab periphery is fixed by a large beam or a small beam. Compared with considering only that, the detailed analysis of the texture becomes possible, and the impact sound level closer to the current situation can be obtained.
By the way, when there is no large opening in the wall of the floor slab end of the building to be analyzed, the case where the wall is a wet door wall or the opening is about 30% or less with a wet outer wall. As an example.
The case where the floor slab end wall has a large opening and a structural member is present is a case where the wall is a dry type boundary wall having a beam or a wet wall having a structural member such as a beam. An example having a part (for example, a sweep window) can be given.
The case where there is a large opening in the wall at the end of the floor slab and there is no structural member means that there is a large opening (for example, a sweep window) and there is no structural member such as a beam. For example, a flat slab end portion having a high sash is a target.

本発明の第3の特徴構成は、前記束柱の存在によるインピーダンスレベルの変化量(ΔLfr)は、数2の式(2)で求めるところにある。 According to a third characteristic configuration of the present invention, the amount of change (ΔL fr ) in the impedance level due to the presence of the bundle pillar is obtained by Expression (2) of Formula 2.

Figure 0003741702
Figure 0003741702

本発明の第3の特徴構成によれば、本発明の第1又は2の特徴構成による上述の作用効果を叶えることができるのに加えて、図6、図7に示すように、当該解析方法によって求めた床衝撃音レベルの解析値と、実測によって得られた床衝撃音レベルの実測値との関係に、ほぼ差が無く、精度の良い解析結果が得られるようになる。
従って、建物建設費用のコストダウンを叶えることが可能となる。
According to the third characteristic configuration of the present invention, in addition to being able to achieve the above-described operational effects of the first or second characteristic configuration of the present invention, as shown in FIGS. There is almost no difference in the relationship between the analysis value of the floor impact sound level obtained by the above and the actual measurement value of the floor impact sound level obtained by actual measurement, and an accurate analysis result can be obtained.
Therefore, it is possible to reduce the cost of building construction.

本発明の第4の特徴構成は、請求項3に記載の各定数は、それぞれ次の値であるところにある。
Y1=7.34、Y2=56.95、Y3=147.48、Y4=127.56
According to a fourth characteristic configuration of the present invention, each constant described in claim 3 has the following value.
Y1 = 7.34, Y2 = 56.95, Y3 = 147.48, Y4 = 127.56

本発明の第4の特徴構成によれば、本発明の第3の特徴構成による上述の作用効果を叶えることができるのに加えて、多数の実験資料を基にして得られた各定数の値を使用することで、前記数2の式(2)自体が、より精度のよい回帰式となり、実情に近い解析をすることが可能となる。   According to the fourth feature configuration of the present invention, in addition to achieving the above-described operation and effect of the third feature configuration of the present invention, each constant value obtained based on a large number of experimental data. By using the equation (2), the equation (2) itself becomes a more accurate regression equation, and analysis close to the actual situation can be performed.

以下に本発明の実施の形態を図面に基づいて説明する。図1、図2は、夫々異なった構造の集合住宅における一住戸部を解析対象建物部(以後、単に建物部と言う)Kとして記載してある。
図1の建物部K1は、RC壁式構造を採用してあり、床スラブSの外周部は、4辺とも構造壁(構造部材に相当)で支持されている。図中の壁部W1、W2、W3は、大きな開口がない状態に形成されている。また、図中の壁部W4は、大きな開口1がある。また、平面中央部分には、束柱2が設けてあり、床スラブSを支持している。
一方、図2の建物部K2は、RCラーメン構造を採用してあり、床スラブSの外周部の各壁部W1、W2、W3、W4の内、W1とW3は、構造壁(構造部材に相当)として構成されている。また、W2は、大きな開口1が設けらているが、床スラブSは、大梁(構造部材に相当)によって支持されている。また、W4は、大きな開口1が設けられていると共に、梁等の構造部材は設けられていない。
以上のように、建物の床スラブの支持状態はさまざまであり、それらの支持条件の差があっても精度良く床衝撃音解析を行えることが切望されており、ここに説明する床衝撃音レベル解析方法によれば、その目的が達成されるものである。
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a single dwelling unit in an apartment house having a different structure as an analysis target building part (hereinafter simply referred to as a building part) K. FIG.
1 employs an RC wall structure, and the outer periphery of the floor slab S is supported by structural walls (corresponding to structural members) on all four sides. The wall portions W1, W2, and W3 in the figure are formed without a large opening. Further, the wall W4 in the figure has a large opening 1. Moreover, the bundle pillar 2 is provided in the plane center part, and the floor slab S is supported.
On the other hand, the building part K2 in FIG. 2 adopts an RC frame structure, and among the wall parts W1, W2, W3, and W4 of the outer peripheral part of the floor slab S, W1 and W3 are structural walls (structure members). Equivalent). W2 has a large opening 1, but the floor slab S is supported by a large beam (corresponding to a structural member). W4 is provided with a large opening 1 and is not provided with a structural member such as a beam.
As described above, the floor floor slabs in the building are supported in various ways, and it is highly desired that floor impact sound analysis can be performed accurately even if there are differences in the support conditions. According to the analysis method, the object is achieved.

建物の床衝撃音レベル解析においては、床スラブSの基本インピーダンスレベルLzにインピーダンス補正を行って実態インピーダンスを求め、その実態インピーダンスを用いて床衝撃音レベルLHを求めることが従来から実施されているが、本発明の床衝撃音レベル解析方法においては、前記インピーダンス補正を行うに当たって、建物部Kに束柱2が存在しない場合と、存在する場合とに分けて、束柱2が存在しない場合には、スラブ周辺固定状況によるインピーダンス変化量、及び、固有振動数によるインピーダンス変化量を加味してインピーダンス補正を行い、束柱2が存在する場合には、更に、束柱2の存在によるインピーダンス変化量をも加味してインピーダンス補正を行うものである。 In floor impact sound level analysis of the building, determined the actual impedance by performing an impedance correction to the basic impedance level L z of the floor slab S, it is carried out conventionally to determine the floor impact sound level L H using the actual impedance However, in the floor impact sound level analysis method of the present invention, when the impedance correction is performed, the bundle pillar 2 is not present in the case where the bundle pillar 2 is not present in the building portion K and the case where it is present. In such a case, the impedance is corrected by taking into account the amount of impedance change due to the slab periphery fixing condition and the amount of impedance change due to the natural frequency. If the bundle column 2 exists, the impedance due to the presence of the bundle column 2 is further increased. Impedance correction is performed in consideration of the amount of change.

そして、前記スラブ周辺固定状況によるインピーダンス変化量は、建物部Kの床スラブS端部の壁部に大きな開口1が無い場合と、前記床スラブS端部の壁に大きな開口1があり且つ構造部材が存在する場合と、前記床スラブS端部の壁に大きな開口1があり且つ構造部材が存在しない場合とに分けて求めるのが解析精度の向上を図るうえで好ましい。   The amount of change in impedance due to the fixed state of the periphery of the slab is such that there is no large opening 1 in the wall portion at the end of the floor slab S of the building K, and there is a large opening 1 in the wall at the end of the floor slab S In order to improve the analysis accuracy, it is preferable to separately determine the case where a member is present and the case where a large opening 1 is present in the wall at the end of the floor slab S and no structural member is present.

また、前記束柱2の存在によるインピーダンスレベル変化量(ΔLfr)は、前記数2の式(2)によって求めるのが解析精度の向上を図るうえで好ましい。 The impedance level change amount (ΔL fr ) due to the presence of the bundle pillars 2 is preferably obtained by the equation (2) of the formula 2 in order to improve the analysis accuracy.

図3は、本発明の床衝撃音レベル解析方法の一実施形態を用いて床衝撃音レベルを解析するフローを示すものである。   FIG. 3 shows a flow for analyzing the floor impact sound level using an embodiment of the floor impact sound level analysis method of the present invention.

このフローに沿って説明を行う。
[1] 重量衝撃源の衝撃力実効値Frmsの設定を行う。これは、JIS−A−1418−2による値によって求めることができる。
[2] 床スラブ断面の各種定数算定を行う。これは、断面二次モーメントや、ヤング係数、厚み、密度等の数値である。
[3] 床スラブの基本インピーダンスLzの算定を行う。これは、前記[2]で求めた数値を基に算出することができ、無限大のスラブを前提としたインピーダンスである。
[4] 床スラブの拘束の影響によるインピーダンス補正を行う。これは、床スラブS端部の壁部に大きな開口1が無い場合、前記床スラブS端部の壁に大きな開口1があり且つ構造部材が存在する場合、前記床スラブS端部の壁に大きな開口1があり且つ構造部材が存在しない場合とに分けてそれぞれインピーダンス変化量ΔLzを求める他、建物部Kに束柱2が存在する場合にはそれに伴うインピーダンス変化量ΔLzをも求めてインピーダンス補正を行う。具体的には、束柱2がある場合とは、前記建物部K2のような場合である。また、上述の各場合における床スラブ端部の影響による周波数180Hzでの衝撃インピーダンスレベルの上昇量は、図4に示すとおりである。
因みに、束柱2の存在による周波数180Hzでの衝撃インピーダンスレベルの上昇量ΔLfrは、前記数2の式(2)によって求めることができる。
[5] 固有振動数の影響によるインピーダンス補正を行う。これは、共振周波数測定結果、及び、床スラブ中央部分でのインピーダンスレベルの測定結果より、共振周波数を基準とした共振特性を求め、この結果より、図5に示すように、スラブ共振周波数が1/3オクターブバンド毎のインピーダンスレベル低下量ZTを求めることができる。
[6] 前記[3]〜[5]の各補正によって、加振点毎の床衝撃音レベル(実態インピーダンスに相当)LZTを求める。
ZT=LZ+ΔLZ+ZT
[7] 床スラブの有効放射面積Seffを算出する。
[8] コンクリートスラブの音響放射係数Lradを求める。
[9] 受音室の吸音力Aを求める。
[10] 騒音計の時定数(動特性Fast)の補正を行う。具体的には、計算値を騒音計のFastピーク読取り値に対応させるための補正値ΔCを求める。
[11] 以上の結果から、加振点毎の床衝撃音レベルLHを数3の式(3)によって求める。但し、式中のDは定数である。
Description will be made along this flow.
[1] The impact force effective value F rms of the heavy impact source is set. This can be obtained by a value according to JIS-A-1418-2.
[2] Calculate various constants of the floor slab section. This is a numerical value such as a cross-sectional second moment, Young's modulus, thickness, and density.
[3] perform the calculation of the basic impedance L z of the floor slab. This can be calculated based on the numerical value obtained in [2], and is an impedance based on an infinite slab.
[4] Impedance correction by the influence of floor slab restraint. This is because when there is no large opening 1 in the wall at the end of the floor slab S, when there is a large opening 1 in the wall at the end of the floor slab S and there is a structural member, the wall at the end of the floor slab S In addition to obtaining the impedance change amount ΔL z separately for the case where there is a large opening 1 and no structural member, the impedance change amount ΔL z associated therewith is also obtained when the bundle column 2 exists in the building K. Perform impedance correction. Specifically, the case where there is the bundle pillar 2 is a case like the building part K2. Further, the amount of increase in the impact impedance level at a frequency of 180 Hz due to the influence of the end of the floor slab in each case described above is as shown in FIG.
Incidentally, the increase amount ΔL fr of the impact impedance level at the frequency of 180 Hz due to the presence of the bundle pillar 2 can be obtained by the equation (2) of the above formula 2.
[5] Impedance correction due to the effect of natural frequency. This is based on the resonance frequency measurement result and the impedance level measurement result at the center portion of the floor slab to obtain the resonance characteristics based on the resonance frequency. From this result, the slab resonance frequency is 1 as shown in FIG. The impedance level decrease amount Z T for each / 3 octave band can be obtained.
[6] The floor impact sound level (corresponding to the actual impedance) L ZT for each excitation point is determined by the corrections of [3] to [5].
L ZT = L Z + ΔL Z + Z T
[7] The effective radiation area S eff of the floor slab is calculated.
[8] Obtain the acoustic radiation coefficient L rad of the concrete slab.
[9] Obtain the sound absorption force A of the sound receiving chamber.
[10] The time constant (dynamic characteristic Fast) of the sound level meter is corrected. Specifically, a correction value ΔC for associating the calculated value with the Fast peak reading value of the sound level meter is obtained.
[11] From the above results, the floor impact sound level L H for each excitation point is obtained by Equation (3) of Equation 3. However, D in a formula is a constant.

Figure 0003741702
Figure 0003741702

[12] 全加振点の平均床衝撃音レベルLHを求める
[13] 重量床衝撃音レベルの遮音等級LH値(又はLH数)の算定を行う。
[12] Obtain the average floor impact sound level L H of all excitation points. [13] Calculate the sound insulation class L H value (or L H number) of the heavy floor impact sound level.

以上の手順によって床衝撃音レベルを求めることができるが、その結果、解析値と実測値との対比を行うと、図7に示すとおりである。そして、図6に示すように、従来に比べて著しい解析精度の向上が観られ、建物スラブ厚を、必要以上に大きく確保する必要が無くなり、無駄を省いた経済設計を実践することが可能となる。   The floor impact sound level can be obtained by the above procedure. As a result, the analysis value and the actual measurement value are compared as shown in FIG. And, as shown in FIG. 6, significant improvement in analysis accuracy is seen compared to the conventional case, and it is not necessary to secure the building slab thickness more than necessary, and it is possible to practice economic design without waste. Become.

〔別実施形態〕
以下に他の実施の形態を説明する。
[Another embodiment]
Other embodiments will be described below.

〈1〉 本発明の床衝撃音レベル解析方法は、例えば、コンピュータを使用して、適切なGUI(グラフィック・ユーザ・インターフェース)を備えたソフトウェアによるデータ入出力と演算を併用すればより好ましい状態で実施することができる。勿論、筆算によって実施することも可能である。
〈2〉 解析対象建物部は、先の実施形態で説明した二種類の建物部の構成に限るものではなく、各種構造、各種平面の建物部に対応することが可能である。
また、束柱は、柱断面形状によって規定されるものではなく、例えば、正方形断面、矩形断面、円形断面、楕円形断面、その他、壁状の長方形断面等であってもよい。要するに、スラブの床衝撃音レベルに係わるインピーダンスに影響を与えるべく設置されているものを含めてここでは束柱という。
〈3〉 基本インピーダンスを求める手法や、各インピーダンス補正を行う手法は、先の実施形態で説明した方法に限るものではなく、広く公知の各種方法を使用することも可能である。要するに、解析対象建物部Kに束柱2が存在しない場合と、存在する場合とに分けて解析を行い、束柱2が存在する場合には、束柱2の存在によるインピーダンス変化量ΔLfrをも加味してインピーダンス補正を行うことが重要である。また、その場合、束柱2の存在によるインピーダンス変化量ΔLfrの求め方に関しては、前記数2の式(2)に限るものではない。
<1> The floor impact sound level analysis method of the present invention is more preferable if, for example, a computer is used in combination with data input / output and calculation by software having an appropriate GUI (graphic user interface). Can be implemented. Of course, it can also be carried out by writing.
<2> The building part to be analyzed is not limited to the configuration of the two types of building parts described in the previous embodiment, and can correspond to building parts of various structures and various planes.
Further, the bundle column is not defined by the column cross-sectional shape, and may be, for example, a square cross section, a rectangular cross section, a circular cross section, an elliptical cross section, a wall-shaped rectangular cross section, or the like. In short, the term “bundle pillar” includes those installed to affect the impedance related to the floor impact sound level of the slab.
<3> The method for obtaining the basic impedance and the method for correcting each impedance are not limited to the methods described in the previous embodiment, and various well-known methods can be used. In short, the analysis is performed separately for the case where the bundle pillar 2 does not exist in the analysis target building portion K and the case where the bundle pillar 2 exists, and when the bundle pillar 2 exists, the impedance change amount ΔL fr due to the presence of the bundle pillar 2 is calculated. It is important to perform impedance correction in consideration of the above. In this case, the method of obtaining the impedance change amount ΔL fr due to the presence of the bundle pillar 2 is not limited to the expression (2) in the above formula 2.

尚、上述のように、図面との対照を便利にするために符号を記したが、該記入により本発明は添付図面の構成に限定されるものではない。   In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry.

解析対象建物部の一例を示す平面図Plan view showing an example of the building part to be analyzed 解析対象建物部の一例を示す平面図Plan view showing an example of the building part to be analyzed 床衝撃音レベル解析方法を示すフロー図Flow diagram showing floor impact sound level analysis method 衝撃インピーダンスレベルの上昇量を示す図Diagram showing the amount of increase in impact impedance level スラブの固有振動の違いによる共振インピーダンスレベル特性比較図Resonance impedance level characteristics comparison diagram due to differences in natural vibration of slab 床衝撃音レベルの比較図Comparison of floor impact sound level 床衝撃音レベルの予測と実測との比較図Comparison of floor impact sound level prediction and actual measurement 床衝撃音レベルの予測と実測との比較図Comparison of floor impact sound level prediction and actual measurement

符号の説明Explanation of symbols

1 開口
2 束柱
K 解析対象建物部
H 床衝撃音レベル
Z 基本インピーダンスレベル
ZT 実態インピーダンスレベル
ΔLZ スラブ端部の固定状況によるインピーダンスレベル変化量
ΔLfr 束柱の存在によるインピーダンスレベル変化量
S 床スラブ
T スラブ固有振動数によるインピーダンスレベル変化量
1 Opening 2 Binder column K Building to be analyzed L H Floor impact sound level L Z Basic impedance level L ZT Actual impedance level ΔL Z The amount of impedance level change due to the fixed state of the slab end Δ L fr The amount of impedance level change due to the presence of the bundle column S floor slab Z T slab impedance level variation due to natural frequency

Claims (4)

床スラブの基本インピーダンスにインピーダンスの補正を行って実態インピーダンスを求め、その実態インピーダンスを用いて床衝撃音レベルを求める床衝撃音レベル解析方法であって、
前記インピーダンス補正を行うに当たって、解析対象建物部に束柱が存在しない場合と、存在する場合とに分けて、束柱が存在しない場合には、スラブ周辺固定状況によるインピーダンス変化量、及び、固有振動数によるインピーダンス変化量を加味してインピーダンス補正を行い、束柱が存在する場合には、更に、束柱の存在によるインピーダンス変化量をも加味してインピーダンス補正を行う床衝撃音レベル解析方法。
A floor impact sound level analysis method for determining the actual impedance by correcting the impedance to the basic impedance of the floor slab, and determining the floor impact sound level using the actual impedance,
In performing the impedance correction, when there is no bundle pillar in the analysis target building part, and when there is no bundle pillar, when there is no bundle pillar, the amount of impedance change due to the fixed state of the slab and the natural vibration A floor impact sound level analysis method in which impedance correction is performed in consideration of an impedance change amount depending on the number, and in the case where a bundle column exists, the impedance correction is also performed in consideration of an impedance change amount due to the presence of the bundle column.
前記スラブ周辺固定状況によるインピーダンスの変化量は、解析対象建物部の床スラブ端部の壁に大きな開口が無い場合と、前記床スラブ端部の壁に大きな開口があり且つ構造部材が存在する場合と、前記床スラブ端部の壁に大きな開口があり且つ構造部材が存在しない場合とに分けて求める請求項1に記載の床衝撃音レベル解析方法。   The amount of change in impedance due to the fixed state of the slab periphery is when there is no large opening in the wall of the floor slab end of the building to be analyzed and when there is a large opening in the wall of the floor slab end and there is a structural member The floor impact sound level analysis method according to claim 1, wherein the floor impact sound level analysis method is obtained separately for a case where there is a large opening in the wall at the end of the floor slab and no structural member is present. 前記束柱の存在によるインピーダンスレベルの変化量(ΔLfr)は、次の式で求める請求項1又は2に記載の床衝撃音レベル解析方法。
ΔLfr=Y1−Y2(χ/λbf
+Y3(χ/λbf2−Y4(χ/λbf3
χ:束柱からの距離(m)
Y1〜Y4:定数
λbf:対象周波数での曲げ波の波長(m)
The floor impact sound level analysis method according to claim 1 or 2, wherein a change amount (ΔL fr ) of the impedance level due to the presence of the bundle pillar is obtained by the following equation.
ΔL fr = Y1-Y2 (χ / λ bf )
+ Y3 (χ / λ bf ) 2 −Y4 (χ / λ bf ) 3
χ: Distance from the bundle pillar (m)
Y1 to Y4: constant λ bf : wavelength of bending wave at target frequency (m)
請求項3に記載の各定数は、それぞれ次の値である請求項3に記載の床衝撃音レベル解析方法。
Y1=7.34、Y2=56.95、Y3=147.48、Y4=127.56
The floor impact sound level analysis method according to claim 3, wherein each constant according to claim 3 is the following value.
Y1 = 7.34, Y2 = 56.95, Y3 = 147.48, Y4 = 127.56
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