JP7613441B2 - Floor structure - Google Patents
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- JP7613441B2 JP7613441B2 JP2022147018A JP2022147018A JP7613441B2 JP 7613441 B2 JP7613441 B2 JP 7613441B2 JP 2022147018 A JP2022147018 A JP 2022147018A JP 2022147018 A JP2022147018 A JP 2022147018A JP 7613441 B2 JP7613441 B2 JP 7613441B2
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- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 167
- 230000002093 peripheral effect Effects 0.000 claims description 66
- 239000006096 absorbing agent Substances 0.000 claims description 63
- 239000000463 material Substances 0.000 claims description 61
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 238000005452 bending Methods 0.000 description 6
- 230000002787 reinforcement Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003190 viscoelastic substance Substances 0.000 description 1
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Description
本発明は、建物の床構造に関するものである。 The present invention relates to the floor structure of a building.
建物の床構造は、床梁と、床梁上に設けられた床パネルとを備える。このような床構造における振動を抑制するための技術が例えば特許文献１に開示される。特許文献１に開示される技術では、床梁に対してチューンドマスダンパーが設けられる。このチューンドマスダンパーは、床梁に固定される中空の剛性補強体と、剛性補強体の内側に粘弾性材を介して設けられたマスと、を備える。チューンドマスダンパーは、床梁の振動に対して慣性力に基づきマスが反対方向に動くことにより、床梁の振動を抑制可能である。 The floor structure of a building comprises floor beams and floor panels provided on the floor beams. Technology for suppressing vibrations in such floor structures is disclosed, for example, in Patent Document 1. In the technology disclosed in Patent Document 1, a tuned mass damper is provided for the floor beams. This tuned mass damper comprises a hollow rigid reinforcement body fixed to the floor beams, and a mass provided inside the rigid reinforcement body via a viscoelastic material. The tuned mass damper is capable of suppressing vibrations of the floor beams by the mass moving in the opposite direction based on inertial force in response to vibrations of the floor beams.
ところで、床構造では、床パネルとして、所定の長手方向に延びる中空部を有する床パネルを用いる場合がある。この場合、中空部を有する床パネルの振動を抑制することに加えて、例えば火災時を想定した耐火性能を向上させるために床パネルに加わる積載荷重に耐え得るように床パネルの強度が必要となる。しかしながら、特許文献１に開示される技術では、事務所用途など床パネルに要求される積載荷重に対する耐性については想定されておらず、床パネルの強度が不十分である虞がある。 In some floor structures, floor panels having a hollow portion extending in a predetermined longitudinal direction are used. In this case, in addition to suppressing vibration of the floor panel having a hollow portion, the strength of the floor panel is required to withstand the load applied to the floor panel in order to improve the fire resistance in the event of a fire, for example. However, the technology disclosed in Patent Document 1 does not take into account the resistance to the load required for floor panels for office use, etc., and there is a risk that the strength of the floor panel will be insufficient.
本発明は、このような事情に鑑みてなされたものであり、その目的は、中空部を有する床パネルの振動を抑制するとともに、床パネルの強度を高めることが可能な床構造を提供することにある。 The present invention was made in consideration of these circumstances, and its purpose is to provide a floor structure that can suppress vibrations in floor panels having hollow portions and increase the strength of the floor panels.
上記課題を解決するために、第一の発明に係る床構造は、建物の床構造であって、所定の長手方向に延びる中空部を有する床パネルと、前記中空部内に挿入された床用補強鋼材と、を備える。前記床用補強鋼材は、前記中空部内で前記長手方向に延びる補強鋼材本体と、前記補強鋼材本体に固定された弾性部材と、前記長手方向に延びるとともに前記弾性部材に支持された錘部材とを有する動吸振器を含む動吸振装置と、を備える。前記補強鋼材本体は、前記中空部の内面に固定されている。 In order to solve the above problem, the floor structure according to the first invention is a floor structure for a building, and comprises a floor panel having a hollow portion extending in a predetermined longitudinal direction, and a floor reinforcing steel material inserted into the hollow portion. The floor reinforcing steel material comprises a reinforcing steel material main body extending in the longitudinal direction within the hollow portion, an elastic member fixed to the reinforcing steel material main body, and a dynamic vibration absorbing device including a dynamic vibration absorber having a weight member extending in the longitudinal direction and supported by the elastic member. The reinforcing steel material main body is fixed to the inner surface of the hollow portion.
第一の発明に係る床構造によれば、床パネルの中空部内に挿入された床用補強鋼材において、中空部の内面に補強鋼材本体が固定され、当該補強鋼材本体に対して動吸振器を含む動吸振装置が設けられる。この動吸振装置によって重量床衝撃音の決定周波数帯域の振動を抑制することができる。これにより、衝撃力が加わることによる床衝撃音を抑制することができる。しかも、補強鋼材本体は、中空部内で長手方向に延び、中空部の内面に固定されているので、補強鋼材本体の曲げ剛性を利用して中空部を有する床パネルの強度を高めることが可能となる。 According to the floor structure of the first invention, in a floor reinforcing steel material inserted into a hollow portion of a floor panel, a reinforcing steel material main body is fixed to the inner surface of the hollow portion, and a dynamic vibration absorbing device including a dynamic vibration absorber is provided for the reinforcing steel material main body. This dynamic vibration absorbing device can suppress vibrations in the frequency band that determines heavy floor impact sound. This makes it possible to suppress floor impact sound caused by the application of impact force. Moreover, since the reinforcing steel material main body extends in the longitudinal direction within the hollow portion and is fixed to the inner surface of the hollow portion, it is possible to increase the strength of the floor panel having a hollow portion by utilizing the bending rigidity of the reinforcing steel material main body.
第二の発明は、第一の発明に係る床構造において、前記床パネルは、前記長手方向の一方の端面から前記長手方向の所定範囲に設定され、切欠き部の形成を許容する一方側端部領域を有し、前記補強鋼材本体は、前記中空部内における前記長手方向の前記一方側端部領域以外の領域に設けられていてもよい。 The second invention is a floor structure according to the first invention, in which the floor panel has a one-side end region that is set within a predetermined range in the longitudinal direction from one end face in the longitudinal direction and allows the formation of a notch, and the reinforcing steel body may be provided in a region within the hollow portion other than the one-side end region in the longitudinal direction.
この態様では、補強鋼材本体は、床パネルの中空部内における長手方向の一方側端部領域以外の領域に設けられているので、床パネルの一方側端部領域には切欠き部の形成が可能である。床パネルの一方側端部領域における切欠き部の形成によって、建物において床構造に対して設けられる柱材と床パネルとの干渉の回避が可能である。 In this embodiment, the reinforcing steel body is provided in an area other than the longitudinal end area on one side of the hollow portion of the floor panel, so that a cutout can be formed in the longitudinal end area on one side of the floor panel. By forming a cutout in the longitudinal end area on one side of the floor panel, it is possible to avoid interference between the floor panel and the pillar material provided for the floor structure in the building.
第三の発明は、第二の発明に係る床構造において、前記床パネルは、前記長手方向の他方の端面から前記長手方向の所定範囲に設定され、切欠き部の形成を許容する他方側端部領域を有し、前記補強鋼材本体は、前記中空部内における前記長手方向の前記一方側端部領域及び前記他方側端部領域以外の領域に設けられていてもよい。 The third invention is a floor structure according to the second invention, in which the floor panel has an other-side end region that is set within a predetermined range in the longitudinal direction from the other end face in the longitudinal direction and allows the formation of a notch, and the reinforcing steel body may be provided in an area within the hollow portion other than the one-side end region and the other-side end region in the longitudinal direction.
この態様では、床パネルの長手方向において一方側端部領域及び他方側端部領域の両端部領域に切欠き部の形成が可能である。しかも、補強鋼材本体が中空部内における長手方向の一方側端部領域及び他方側端部領域以外の領域に設けられているので、床パネルにおける切欠き部の形成を許容しながら、補強鋼材本体による床パネルに対する最大限の補強が可能である。 In this embodiment, it is possible to form a notch in both end regions of the one side end region and the other side end region in the longitudinal direction of the floor panel. Moreover, since the reinforcing steel body is provided in an area other than the one side end region and the other side end region in the longitudinal direction within the hollow portion, it is possible to maximize the reinforcement of the floor panel with the reinforcing steel body while allowing the formation of a notch in the floor panel.
第四の発明は、第一から第三のいずれか一つの発明に係る床構造において、前記動吸振装置は、前記床パネルの前記長手方向の長さ寸法に対応した前記補強鋼材本体の前記長手方向の長さ寸法に応じて、１又は複数の前記動吸振器を含んでもよい。 The fourth invention is a floor structure according to any one of the first to third inventions, in which the dynamic vibration absorbing device may include one or more dynamic vibration absorbers depending on the longitudinal length dimension of the reinforcing steel body that corresponds to the longitudinal length dimension of the floor panel.
動吸振装置に含まれる動吸振器は、錘部材の長手方向の長さ寸法の違いに応じて固有振動数が異なる。このため、動吸振器の組み合わせに基づいて、動吸振装置の固有振動数を調整することができる。この場合、例えば、床パネルの長手方向の長さ寸法に対応した補強鋼材本体の長手方向の長さ寸法に応じて、補強鋼材本体に対して設けられる動吸振器の組み合わせを設定する。動吸振器の組み合わせに基づき固有振動数が調整された動吸振装置によって、長手方向の長さ寸法の異なる複数種の床パネルが複雑に組み合わさった床構成であっても、床衝撃音性能を決定づける帯域における制振性能を向上させることができる。このため、長手方向の長さ寸法の異なる複数種の床パネルのそれぞれに対応して、衝撃力が加わることによる床衝撃音を幅広く抑制することができる。 The dynamic vibration absorbers included in the dynamic vibration absorbing device have different natural frequencies depending on the difference in the longitudinal length of the weight member. Therefore, the natural frequency of the dynamic vibration absorbing device can be adjusted based on the combination of dynamic vibration absorbers. In this case, for example, the combination of dynamic vibration absorbers provided for the reinforcing steel body is set according to the longitudinal length of the reinforcing steel body corresponding to the longitudinal length of the floor panel. By using a dynamic vibration absorbing device whose natural frequency is adjusted based on the combination of dynamic vibration absorbers, it is possible to improve vibration control performance in the band that determines floor impact sound performance, even in a floor configuration in which multiple types of floor panels with different longitudinal lengths are combined in a complex manner. Therefore, floor impact sound caused by the application of impact force can be widely suppressed in accordance with each of multiple types of floor panels with different longitudinal lengths.
第五の発明は、第一から第四のいずれか一つの発明に係る床構造において、前記補強鋼材本体は、前記中空部内に挿入された状態で、前記中空部の内面において下方向を向く中空部上面に固定されてもよい。 In the fifth invention, in the floor structure according to any one of the first to fourth inventions, the reinforcing steel body may be fixed to the upper surface of the hollow portion facing downward on the inner surface of the hollow portion while inserted into the hollow portion.
床構造は、火災時を想定した耐火性能を有することが要求される。この場合、床パネルに上方から所定の積載荷重が加えられた状態で下方から火炎に晒されたときに、床パネルの下面に亀裂などが生じて床パネルの強度が低下した場合でも、積載荷重に耐え得るのに十分な床パネルの強度が必要となる。そこで、補強鋼材本体は、床パネルの中空部内に挿入された状態で、中空部の内面において下方向を向く中空部上面に固定される。この場合、火災時などにおいて下方からの火炎によって床パネルの下面に亀裂などが生じて床パネルの強度が低下した場合でも、中空部上面に固定された補強鋼材本体によって所定の積載荷重に耐え得るための所定の床強度を保持することができる。 The floor structure is required to have fire resistance in anticipation of a fire. In this case, when a floor panel is subjected to a predetermined load from above and exposed to flames from below, even if cracks or the like appear on the underside of the floor panel and the strength of the floor panel is reduced, the floor panel needs to have sufficient strength to withstand the load. Therefore, the reinforcing steel body is inserted into the hollow part of the floor panel and fixed to the upper surface of the hollow part facing downward on the inner surface of the hollow part. In this case, even if a flame from below causes cracks or the like on the underside of the floor panel during a fire or the like and reduces the strength of the floor panel, the reinforcing steel body fixed to the upper surface of the hollow part can maintain a predetermined floor strength to withstand a predetermined load.
第六の発明は、第一から第五のいずれか一つの発明に係る床構造において、前記補強鋼材本体は、前記長手方向に延びる軸を中心として内部空間を取り囲む周壁部を有し、前記動吸振装置は、前記内部空間内の前記周壁部に設けられてもよい。 The sixth invention is a floor structure according to any one of the first to fifth inventions, in which the reinforcing steel body has a peripheral wall portion that surrounds the internal space centered on an axis extending in the longitudinal direction, and the dynamic vibration absorbing device may be provided on the peripheral wall portion within the internal space.
この態様では、補強鋼材本体は、内部空間を取り囲む周壁部を有することにより曲げ剛性が高まるので、床パネルの強度を高める効果が増大する。しかも、補強鋼材本体は、周壁部の内部空間内の周壁部に設けられた動吸振装置を保護する機能も有する。 In this embodiment, the reinforcing steel body has a peripheral wall portion surrounding the internal space, which increases the bending rigidity, thereby enhancing the effect of increasing the strength of the floor panel. Moreover, the reinforcing steel body also has the function of protecting the dynamic vibration absorbing device provided on the peripheral wall portion within the internal space of the peripheral wall portion.
第七の発明は、第六の発明に係る床構造において、前記補強鋼材本体は、前記周壁部の前記長手方向と直交する上下方向に沿った高さ寸法が、前記中空部の前記上下方向に沿った高さ寸法よりも小さい値に設定されてもよい。この場合、前記補強鋼材本体は、前記中空部の内面において下方向を向く中空部上面に固定された状態で、前記中空部の内面において前記中空部上面と対向する中空部下面との間に隙間が形成される。 The seventh invention is a floor structure according to the sixth invention, in which the height dimension of the reinforcing steel body in the vertical direction perpendicular to the longitudinal direction of the peripheral wall portion may be set to a value smaller than the height dimension of the hollow portion in the vertical direction. In this case, when the reinforcing steel body is fixed to the upper surface of the hollow portion facing downward on the inner surface of the hollow portion, a gap is formed between the upper surface of the hollow portion and the lower surface of the hollow portion facing the upper surface of the hollow portion on the inner surface of the hollow portion.
この態様では、周壁部の高さ寸法が中空部の高さ寸法よりも小さい値に設定されているので、補強鋼材本体は、中空部内において中空部上面に固定された状態で中空部下面との間に隙間が形成される。これにより、床パネルの下面が火炎に晒された状態において、床パネルの下面から上面への補強鋼材本体を経由した熱の伝達を抑制することができる。このため、下方からの火炎によって床パネルの上面にまで亀裂などが生じることを抑制しつつ、中空部上面に固定された補強鋼材本体によって床パネルの強度を高めることが可能となる。 In this embodiment, the height dimension of the peripheral wall portion is set to a value smaller than the height dimension of the hollow portion, so that the reinforcing steel body is fixed to the upper surface of the hollow portion within the hollow portion, forming a gap between the lower surface of the hollow portion and the reinforcing steel body. This makes it possible to suppress the transfer of heat from the lower surface of the floor panel to the upper surface via the reinforcing steel body when the lower surface of the floor panel is exposed to flames. This makes it possible to increase the strength of the floor panel by using the reinforcing steel body fixed to the upper surface of the hollow portion, while suppressing the occurrence of cracks on the upper surface of the floor panel due to flames from below.
第八の発明は、第六又は第七の発明に係る床構造において、前記周壁部は、前記内部空間を上から覆い、前記中空部の内面において下方向を向く中空部上面に固定される上周壁片と、前記内部空間を下から覆うとともに前記上周壁片に取り付けられ、前記弾性部材が固定される下周壁片と、を有していてもよい。 The eighth invention is a floor structure according to the sixth or seventh invention, in which the peripheral wall portion may have an upper peripheral wall piece that covers the internal space from above and is fixed to the upper surface of the hollow portion facing downward on the inner surface of the hollow portion, and a lower peripheral wall piece that covers the internal space from below and is attached to the upper peripheral wall piece, to which the elastic member is fixed.
この態様では、補強鋼材本体の周壁部は、上周壁片と、その上周壁片に取り付けられる下周壁片と、を有している。この場合、補強鋼材本体は、周壁部の上周壁片が中空部内の中空部上面に固定されることにより、中空部を有する床パネルの強度を高めることが可能となる。しかも、動吸振器の弾性部材が固定されるように動吸振装置を下周壁片に配置し、その後、下周壁片を上周壁片に取り付けることにより、周壁部の内部空間内に動吸振装置を簡単に設けることができる。 In this embodiment, the peripheral wall of the reinforcing steel body has an upper peripheral wall piece and a lower peripheral wall piece attached to the upper peripheral wall piece. In this case, the upper peripheral wall piece of the peripheral wall of the reinforcing steel body is fixed to the upper surface of the hollow portion within the hollow portion, thereby making it possible to increase the strength of the floor panel having a hollow portion. Moreover, by placing the dynamic vibration absorber on the lower peripheral wall piece so that the elastic member of the dynamic vibration absorber is fixed, and then attaching the lower peripheral wall piece to the upper peripheral wall piece, the dynamic vibration absorber can be easily provided within the internal space of the peripheral wall portion.
以上説明したように、本発明によれば、中空部を有する床パネルの振動を抑制するとともに、床パネルの強度を高めることが可能な床構造を提供することができる。 As described above, the present invention provides a floor structure that can suppress vibrations in floor panels having hollow spaces and increase the strength of the floor panels.
以下、本発明の実施形態に係る床構造について、図面に基づいて説明する。なお、以下では、方向関係についてはＸＹＺ直交座標軸を用いて説明する。Ｘ軸方向は水平面と平行な方向であり、Ｙ軸方向は水平面上でＸ軸方向と直交する方向であり、Ｚ軸方向はＸ、Ｙ両方向に直交する上下方向である。 The floor structure according to an embodiment of the present invention will be described below with reference to the drawings. Note that directional relationships will be described below using XYZ orthogonal coordinate axes. The X-axis direction is parallel to the horizontal plane, the Y-axis direction is perpendicular to the X-axis direction on the horizontal plane, and the Z-axis direction is the up-down direction perpendicular to both the X and Y directions.
図１には、本実施形態に係る床構造１が示されている。また、図２には、床パネル２１の中空部２１１に床用補強鋼材３が挿入された状態が示されており、図３には、床用補強鋼材３の斜視図が示されている。床構造１は、例えば鉄骨造の建物の一部であって、一の階層の床を構成する。床構造１は、所定の長手方向Ｄ１に延びる中空部２１１を有する床パネル２１を含む床体２と、中空部２１１内に挿入された床用補強鋼材３と、床パネル２１を支持する複数の床梁６と、床梁６上に設けられた複数の防振材７と、を備える。 Figure 1 shows a floor structure 1 according to this embodiment. Figure 2 shows a state in which floor reinforcing steel material 3 is inserted into a hollow portion 211 of a floor panel 21, and Figure 3 shows a perspective view of the floor reinforcing steel material 3. The floor structure 1 is, for example, part of a steel-framed building, and constitutes the floor of one story. The floor structure 1 comprises a floor body 2 including a floor panel 21 having a hollow portion 211 extending in a predetermined longitudinal direction D1, floor reinforcing steel material 3 inserted into the hollow portion 211, a plurality of floor beams 6 supporting the floor panel 21, and a plurality of vibration-proof materials 7 provided on the floor beams 6.
図１の例では、複数の床梁６は、Ｘ軸方向に延び、Ｙ軸方向に所定の間隔を隔てて互いに平行するように配置される。床梁６は、例えば、断面形状がＨ形のＨ形鋼によって構成される。この場合、床梁６は、一対のフランジ６１と、両フランジ６１同士を接続するウェブ６２とを有する。床梁６は、一対のフランジ６１がＺ軸方向に並んだ状態でＸ軸方向に延びるように配置される。 In the example of FIG. 1, multiple floor beams 6 extend in the X-axis direction and are arranged parallel to each other at a predetermined interval in the Y-axis direction. The floor beams 6 are, for example, made of H-shaped steel with an H-shaped cross section. In this case, the floor beams 6 have a pair of flanges 61 and a web 62 connecting both flanges 61. The floor beams 6 are arranged so that the pair of flanges 61 extend in the X-axis direction with the pair of flanges 61 aligned in the Z-axis direction.
床体２の床パネル２１は、互いに隣り合う２本の床梁６同士の間に跨るように配置された状態で各床梁６に下方側から支持される。床パネル２１は、例えば、中空押出セメント板によって構成され、所定の長手方向Ｄ１に延びる少なくとも１つの中空部２１１を有している。床パネル２１は、中空部２１１の長手方向Ｄ１に延びる矩形の平面形状を有する板状の部材である。床パネル２１は、中空部２１１の長手方向Ｄ１がＹ軸方向と一致するように配置された状態で、図１に示されるように２本の床梁６間に架け渡される。具体的には、床パネル２１は、長手方向Ｄ１（Ｙ軸方向）の各端部が各床梁６のフランジ６１によって下方側から支持される。なお、長手方向Ｄ１に見た中空部２１１の形状は特に限定されるものではないが、例えば矩形状である。また、図１の例では、床パネル２１は、Ｘ軸方向に並ぶ６つの中空部２１１を有している。 The floor panel 21 of the floor body 2 is supported from below by each floor beam 6 in a state in which it is arranged so as to straddle two adjacent floor beams 6. The floor panel 21 is, for example, made of a hollow extruded cement board and has at least one hollow portion 211 extending in a predetermined longitudinal direction D1. The floor panel 21 is a plate-shaped member having a rectangular planar shape extending in the longitudinal direction D1 of the hollow portion 211. The floor panel 21 is spanned between two floor beams 6 as shown in FIG. 1 in a state in which the longitudinal direction D1 of the hollow portion 211 coincides with the Y-axis direction. Specifically, each end of the floor panel 21 in the longitudinal direction D1 (Y-axis direction) is supported from below by the flange 61 of each floor beam 6. The shape of the hollow portion 211 as viewed in the longitudinal direction D1 is not particularly limited, but is, for example, rectangular. In addition, in the example of FIG. 1, the floor panel 21 has six hollow portions 211 aligned in the X-axis direction.
また、図２に示されるように、床パネル２１は、長手方向Ｄ１の両端のそれぞれに設けられた一対の端部領域２１ＲＡと、長手方向Ｄ１において一対の端部領域２１ＲＡの間の中間領域２１ＲＢと、を有している。一対の端部領域２１ＲＡは、床パネル２１の長手方向Ｄ１の一方の端面から長手方向Ｄ１の所定範囲に設定された一方側端部領域と、床パネル２１の長手方向Ｄ１の他方の端面から長手方向Ｄ１の所定範囲に設定された他方側端部領域と、を含む。中間領域２１ＲＢは、床パネル２１において一対の端部領域２１ＲＡ以外の領域となる。床パネル２１において、一対の端部領域２１ＲＡは、床梁６によって支持されるとともに、図１に示される床梁６上に立設される柱材８との干渉を回避するための切欠き部２２の形成を許容する領域である。なお、一対の端部領域２１ＲＡのうちの一方側端部領域のみが、切欠き部２２の形成を許容する領域とされてもよい。 2, the floor panel 21 has a pair of end regions 21RA provided at each end in the longitudinal direction D1, and an intermediate region 21RB between the pair of end regions 21RA in the longitudinal direction D1. The pair of end regions 21RA includes a one-side end region set in a predetermined range in the longitudinal direction D1 from one end face of the floor panel 21 in the longitudinal direction D1, and an other-side end region set in a predetermined range in the longitudinal direction D1 from the other end face of the floor panel 21 in the longitudinal direction D1. The intermediate region 21RB is an area other than the pair of end regions 21RA in the floor panel 21. In the floor panel 21, the pair of end regions 21RA are supported by the floor beam 6 and are areas that allow the formation of a notch 22 to avoid interference with the column material 8 erected on the floor beam 6 shown in FIG. 1. In addition, only one of the pair of end regions 21RA may be an area that allows the formation of the notch portion 22.
また、図２に示されるように、床パネル２１は、中間領域２１ＲＢにおいて中空部２１１と連通するとともにボルト９が挿通される複数のボルト孔２１２を有している。本実施形態では、複数のボルト孔２１２は、床パネル２１の上面から中空部２１１まで延びる孔であり、床パネル２１の長手方向Ｄ１において少なくとも両端にそれぞれ設けられる。なお、床パネル２１の長手方向Ｄ１において両端の間の領域にボルト孔２１２が設けられていてもよい。また、複数のボルト孔２１２は、挿通されるボルト９の頭部が床パネル２１の上面から上方に突出することを抑制可能に座ぐりが形成されていてもよい。 2, the floor panel 21 has a plurality of bolt holes 212 in the intermediate region 21RB that communicate with the hollow portion 211 and through which the bolts 9 are inserted. In this embodiment, the plurality of bolt holes 212 are holes that extend from the upper surface of the floor panel 21 to the hollow portion 211, and are provided at least at both ends in the longitudinal direction D1 of the floor panel 21. The bolt holes 212 may be provided in a region between both ends in the longitudinal direction D1 of the floor panel 21. The plurality of bolt holes 212 may also be formed with countersunk holes so as to prevent the heads of the inserted bolts 9 from protruding upward from the upper surface of the floor panel 21.
複数の防振材７はそれぞれ、床梁６に対する床パネル２１の相対移動に応じて弾性変形可能な部材である。防振材７は、例えば、ポリウレタンなどの合成樹脂やゴムによって構成される。複数の防振材７はそれぞれ、床梁６と床パネル２１との間で弾性変形することにより、床パネル２１から床梁６への振動の伝達を抑制する。防振材７の寸法や硬さ、配置位置、及び個数は、床パネル２１から床梁６への振動の伝達を的確に抑制することが可能となるように、防振材７が受ける荷重（すなわち、防振材７の上に配置される床パネル２１の重量及び床パネル２１が受ける荷重）に基づいて設定される。図１では、床梁６の一対のフランジ６１のうちの上方側のフランジ６１上において、複数の防振材７が配置される例が示されている。 Each of the multiple vibration-proof materials 7 is a member that can elastically deform in response to the relative movement of the floor panel 21 with respect to the floor beam 6. The vibration-proof materials 7 are made of, for example, synthetic resin such as polyurethane or rubber. Each of the multiple vibration-proof materials 7 suppresses the transmission of vibration from the floor panel 21 to the floor beam 6 by elastically deforming between the floor beam 6 and the floor panel 21. The dimensions, hardness, arrangement position, and number of the vibration-proof materials 7 are set based on the load received by the vibration-proof materials 7 (i.e., the weight of the floor panel 21 placed on the vibration-proof materials 7 and the load received by the floor panel 21) so that the transmission of vibration from the floor panel 21 to the floor beam 6 can be appropriately suppressed. FIG. 1 shows an example in which multiple vibration-proof materials 7 are arranged on the upper flange 61 of a pair of flanges 61 of the floor beam 6.
図１及び図２に示されるように、床用補強鋼材３は、床パネル２１の中空部２１１に挿入して用いられる構造体である。床パネル２１が複数の中空部２１１を有する場合、１つ以上の中空部２１１に床用補強鋼材３が挿入される。例えば、図１に示されるように、床パネル２１がＸ軸方向に並ぶ６つの中空部２１１を有する場合、６つの中空部２１１の全てに床用補強鋼材３が挿入されてもよいし、６つの中空部２１１のうちの１つの中空部２１１に床用補強鋼材３が挿入されてもよいし、６つの中空部２１１のうちの２以上６未満の中空部２１１に床用補強鋼材３が挿入されてもよい。 As shown in Figs. 1 and 2, the floor reinforcing steel material 3 is a structure that is inserted into a hollow portion 211 of the floor panel 21. When the floor panel 21 has multiple hollow portions 211, the floor reinforcing steel material 3 is inserted into one or more of the hollow portions 211. For example, as shown in Fig. 1, when the floor panel 21 has six hollow portions 211 aligned in the X-axis direction, the floor reinforcing steel material 3 may be inserted into all six hollow portions 211, the floor reinforcing steel material 3 may be inserted into one of the six hollow portions 211, or the floor reinforcing steel material 3 may be inserted into two or more but less than six of the six hollow portions 211.
図２に加えて図３を参照しながら、床用補強鋼材３を詳細に説明する。床用補強鋼材３は、補強鋼材本体４と、補強鋼材本体４に対して設けられる動吸振装置５と、を備える。 The floor reinforcing steel material 3 will be described in detail with reference to FIG. 3 in addition to FIG. 2. The floor reinforcing steel material 3 comprises a reinforcing steel material body 4 and a dynamic vibration absorbing device 5 provided for the reinforcing steel material body 4.
補強鋼材本体４は、鋼材によって構成される。補強鋼材本体４は、床パネル２１の中空部２１１内に挿入可能な断面形状を有し、中空部２１１内に挿入された状態で中空部２１１の内面に固定される。補強鋼材本体４は、中空部２１１の長手方向Ｄ１に延びる所定の長さを有するとともに、長手方向Ｄ１に対する所定の曲げ剛性を有する。補強鋼材本体４は、中空部２１１内で長手方向Ｄ１に延び、その長手方向Ｄ１の少なくとも両端部が中空部２１１の内面に固定されている。 The reinforcing steel body 4 is made of steel. The reinforcing steel body 4 has a cross-sectional shape that allows it to be inserted into the hollow portion 211 of the floor panel 21, and is fixed to the inner surface of the hollow portion 211 when inserted into the hollow portion 211. The reinforcing steel body 4 has a predetermined length extending in the longitudinal direction D1 of the hollow portion 211, and has a predetermined bending rigidity with respect to the longitudinal direction D1. The reinforcing steel body 4 extends in the longitudinal direction D1 within the hollow portion 211, and at least both ends in the longitudinal direction D1 are fixed to the inner surface of the hollow portion 211.
動吸振装置５は、補強鋼材本体４に固定された弾性部材５１１と、長手方向Ｄ１に延びるとともに弾性部材５１１に支持された錘部材５１２とを有する動吸振器５１を含む。動吸振器５１において、弾性部材５１１は、床パネル２１の中空部２１１の内面に固定された補強鋼材本体４に対する錘部材５１２の相対移動に応じて弾性変形可能な部材である。弾性部材５１１は、例えば、ポリウレタンなどの合成樹脂やゴムによって構成される。錘部材５１２は、例えば、鋼材などによって構成される。動吸振装置５では、衝撃力の加わった床パネル２１が振動する場合に、動吸振器５１において、弾性部材５１１に支持された錘部材５１２が、床パネル２１の振動に対して慣性力に基づき反対方向に動くことにより、床パネル２１の振動を抑制可能である。なお、動吸振器５１において、錘部材５１２に対する弾性部材５１１の配置数及び配置位置は特に限定されない。例えば、錘部材５１２の長手方向Ｄ１の両端のそれぞれの位置のみに弾性部材５１１が配置されてもよいし、錘部材５１２の長手方向Ｄ１の両端のそれぞれの位置と両端の間の１又は複数の位置とに弾性部材５１１が配置されてもよい。 The dynamic vibration absorbing device 5 includes a dynamic vibration absorber 51 having an elastic member 511 fixed to the reinforcing steel body 4 and a weight member 512 extending in the longitudinal direction D1 and supported by the elastic member 511. In the dynamic vibration absorber 51, the elastic member 511 is a member that can be elastically deformed in response to the relative movement of the weight member 512 with respect to the reinforcing steel body 4 fixed to the inner surface of the hollow portion 211 of the floor panel 21. The elastic member 511 is made of, for example, synthetic resin such as polyurethane or rubber. The weight member 512 is made of, for example, steel. In the dynamic vibration absorbing device 5, when the floor panel 21 vibrates due to the application of an impact force, the weight member 512 supported by the elastic member 511 in the dynamic vibration absorber 51 moves in the opposite direction based on the inertial force with respect to the vibration of the floor panel 21, thereby suppressing the vibration of the floor panel 21. In the dynamic vibration reducer 51, the number and positions of the elastic members 511 relative to the weight member 512 are not particularly limited. For example, the elastic members 511 may be arranged only at both ends of the weight member 512 in the longitudinal direction D1, or the elastic members 511 may be arranged at both ends of the weight member 512 in the longitudinal direction D1 and at one or more positions between the ends.
本実施形態に係る床構造１では、床パネル２１の中空部２１１内に挿入された床用補強鋼材３において、中空部２１１の内面に補強鋼材本体４が固定され、当該補強鋼材本体４に対して動吸振器５１を含む動吸振装置５が設けられる。この動吸振装置５によって床パネル２１の固有振動数周辺での共振現象を抑制することができる。これにより、衝撃力が加わることによる床パネル２１の振動を抑制することができる。このため、床構造１における指標となる周波数帯域（例えばオクターブバンド中心周波数６３Ｈｚ）を有する床衝撃音（以下、「重量床衝撃音」という）の遮断性能を向上させることができる。 In the floor structure 1 according to this embodiment, a reinforcing steel body 4 is fixed to the inner surface of the hollow portion 211 of the floor panel 21 in the floor reinforcing steel material 3 inserted in the hollow portion 211, and a dynamic vibration absorbing device 5 including a dynamic vibration absorber 51 is provided for the reinforcing steel body 4. This dynamic vibration absorbing device 5 can suppress the resonance phenomenon around the natural frequency of the floor panel 21. This makes it possible to suppress the vibration of the floor panel 21 caused by the application of an impact force. This makes it possible to improve the blocking performance of floor impact sound (hereinafter referred to as "heavy floor impact sound") having a frequency band (for example, an octave band center frequency of 63 Hz) that is an index of the floor structure 1.
しかも、補強鋼材本体４は、中空部２１１内で長手方向Ｄ１に延び、その長手方向Ｄ１の少なくとも両端部が中空部２１１の内面に固定されているので、補強鋼材本体４の曲げ剛性を利用して中空部２１１を有する床パネル２１の強度を高めることが可能となる。 Moreover, the reinforcing steel body 4 extends in the longitudinal direction D1 within the hollow portion 211, and at least both ends in the longitudinal direction D1 are fixed to the inner surface of the hollow portion 211, so that it is possible to increase the strength of the floor panel 21 having the hollow portion 211 by utilizing the bending rigidity of the reinforcing steel body 4.
図２に示されるように、補強鋼材本体４は、中空部２１１内における長手方向Ｄ１の一対の端部領域２１ＲＡ以外の中間領域２１ＲＢに設けられている。これにより、床パネル２１の一対の端部領域２１ＲＡには切欠き部２２の形成が可能である。床パネル２１の一対の端部領域２１ＲＡにおける切欠き部２２の形成によって、図１に示されるように、建物において床構造１に対して設けられる柱材８と床パネル２１との干渉の回避が可能である。 As shown in FIG. 2, the reinforcing steel body 4 is provided in the hollow portion 211 in the intermediate region 21RB other than the pair of end regions 21RA in the longitudinal direction D1. This allows the formation of cutout portions 22 in the pair of end regions 21RA of the floor panel 21. By forming the cutout portions 22 in the pair of end regions 21RA of the floor panel 21, it is possible to avoid interference between the column material 8 provided for the floor structure 1 in the building and the floor panel 21, as shown in FIG. 1.
補強鋼材本体４は、床パネル２１の中間領域２１ＲＢにおける長手方向Ｄ１の全域に亘って配置可能な長さを有していてもよい。この場合、補強鋼材本体４は、中空部２１１内における長手方向Ｄ１の一対の端部領域２１ＲＡ以外の中間領域２１ＲＢの全領域に亘り延びている。これにより、床パネル２１における一対の端部領域２１ＲＡに切欠き部２２の形成を許容しながら、補強鋼材本体４による床パネル２１に対する最大限の補強が可能である。なお、補強鋼材本体４は、中空部２１１内における長手方向Ｄ１の両端部間の全領域に亘り延びていてもよい。 The reinforcing steel body 4 may have a length that allows it to be positioned over the entire area of the intermediate region 21RB of the floor panel 21 in the longitudinal direction D1. In this case, the reinforcing steel body 4 extends over the entire area of the intermediate region 21RB in the longitudinal direction D1 within the hollow portion 211, except for a pair of end regions 21RA. This allows the reinforcing steel body 4 to provide maximum reinforcement to the floor panel 21 while allowing the formation of cutout portions 22 in the pair of end regions 21RA of the floor panel 21. The reinforcing steel body 4 may extend over the entire area between both ends in the longitudinal direction D1 within the hollow portion 211.
図２及び図３に示されるように、補強鋼材本体４は、長手方向Ｄ１に延びる軸を中心として内部空間４１Ａを取り囲む周壁部４１を有している。この場合、動吸振器５１を含む動吸振装置５は、周壁部４１によって取り囲まれる内部空間４１Ａ内に設けられる。補強鋼材本体４は、内部空間４１Ａを取り囲む周壁部４１を有することにより曲げ剛性が高まるので、床パネル２１の強度を高める効果が増大する。しかも、補強鋼材本体４は、周壁部４１の内部空間４１Ａ内に設けられた動吸振装置５を保護する機能も有する。 As shown in Figures 2 and 3, the reinforcing steel body 4 has a peripheral wall portion 41 that surrounds the internal space 41A centered on an axis extending in the longitudinal direction D1. In this case, the dynamic vibration absorbing device 5 including the dynamic vibration absorber 51 is provided within the internal space 41A surrounded by the peripheral wall portion 41. Since the reinforcing steel body 4 has the peripheral wall portion 41 that surrounds the internal space 41A, the bending rigidity is increased, and the effect of increasing the strength of the floor panel 21 is enhanced. Moreover, the reinforcing steel body 4 also has the function of protecting the dynamic vibration absorbing device 5 provided within the internal space 41A of the peripheral wall portion 41.
ここで、床構造１では、床パネル２１に加わる積載荷重に耐え得るように床パネル２１の強度が必要となる。例えば、床構造１は、火災時を想定した耐火性能を有することが要求される。この場合、床パネル２１に上方から所定の積載荷重が加えられた状態で下方から火炎に晒されたときに、床パネル２１の下面に亀裂などが生じて床パネル２１の強度が低下した場合でも、積載荷重に耐え得るのに十分な床パネル２１の強度が必要となる。 Here, in the floor structure 1, the floor panel 21 needs to be strong enough to withstand the load applied to it. For example, the floor structure 1 is required to have fire resistance in anticipation of a fire. In this case, when the floor panel 21 is exposed to flames from below while a certain load is applied to it from above, even if cracks or the like occur on the underside of the floor panel 21 and the strength of the floor panel 21 is reduced, the floor panel 21 needs to have sufficient strength to withstand the load.
そこで、補強鋼材本体４は、中空部２１１内に挿入された状態で、中空部２１１の内面において長手方向Ｄ１と直交する上下方向（Ｚ軸方向）のうちの下方向を向く中空部上面２１１１に固定されることが望ましい。この場合、火災時などにおいて下方からの火炎によって床パネル２１の下面に亀裂などが生じて床パネル２１の強度が低下した場合でも、中空部上面２１１１に固定された周壁部４１を有する補強鋼材本体４によって所定の積載荷重に耐え得るための所定の床強度を保持し、床パネル２１の落下を防ぐことができる。 Therefore, it is desirable that the reinforcing steel body 4, when inserted into the hollow portion 211, be fixed to the hollow portion upper surface 2111, which faces downward in the vertical direction (Z-axis direction) perpendicular to the longitudinal direction D1 on the inner surface of the hollow portion 211. In this case, even if flames from below cause cracks on the underside of the floor panel 21 during a fire or the like, reducing the strength of the floor panel 21, the reinforcing steel body 4 having the peripheral wall portion 41 fixed to the hollow portion upper surface 2111 can maintain a predetermined floor strength to withstand a predetermined load and prevent the floor panel 21 from falling.
また、図２に示されるように、補強鋼材本体４は、周壁部４１の上下方向（Ｚ軸方向）に沿った高さ寸法Ｈ２が、中空部２１１の上下方向に沿った高さ寸法Ｈ１よりも小さい値に設定されることが望ましい。この場合、補強鋼材本体４は、中空部２１１内において中空部上面２１１１に固定された状態で、中空部２１１の内面において中空部上面２１１１と対向する中空部下面２１１２との間に隙間ＧＰが形成される。これにより、床パネル２１の下面が火炎に晒された状態において、床パネル２１の下面から上面への補強鋼材本体４を経由した熱の伝達を抑制することができる。このため、下方からの火炎によって床パネル２１の上面にまで亀裂などが生じることを抑制しつつ、中空部上面２１１１に固定された補強鋼材本体４によって床パネル２１の強度を高めることが可能となる。 As shown in FIG. 2, it is desirable that the height dimension H2 of the reinforcing steel body 4 along the vertical direction (Z-axis direction) of the peripheral wall portion 41 is set to a value smaller than the height dimension H1 along the vertical direction of the hollow portion 211. In this case, when the reinforcing steel body 4 is fixed to the hollow portion upper surface 2111 in the hollow portion 211, a gap GP is formed between the hollow portion upper surface 2111 and the hollow portion lower surface 2112 facing the hollow portion upper surface 2111 on the inner surface of the hollow portion 211. This makes it possible to suppress the transfer of heat from the lower surface to the upper surface of the floor panel 21 via the reinforcing steel body 4 when the lower surface of the floor panel 21 is exposed to flames. Therefore, it is possible to increase the strength of the floor panel 21 by the reinforcing steel body 4 fixed to the hollow portion upper surface 2111 while suppressing the occurrence of cracks and the like on the upper surface of the floor panel 21 due to flames from below.
また、補強鋼材本体４において、周壁部４１は、内部空間４１Ａを上から覆う上周壁片４１１と、内部空間４１Ａを下から覆うとともに上周壁片４１１に取り付けられる下周壁片４１２と、を有している。上周壁片４１１は、中空部２１１内において中空部上面２１１１に固定される。下周壁片４１２は、動吸振装置５における動吸振器５１の弾性部材５１１が固定される。補強鋼材本体４は、周壁部４１の上周壁片４１１が中空部２１１内の中空部上面２１１１に固定されることにより、中空部２１１を有する床パネル２１の強度を高めることが可能となる。しかも、動吸振器５１の弾性部材５１１が固定されるように動吸振装置５を下周壁片４１２に配置し、その後、下周壁片４１２をビスＳＣなどによって上周壁片４１１に取り付けることにより、周壁部４１の内部空間４１Ａ内に動吸振装置５を簡単に設けることができる。 In addition, in the reinforcing steel body 4, the peripheral wall portion 41 has an upper peripheral wall piece 411 that covers the internal space 41A from above, and a lower peripheral wall piece 412 that covers the internal space 41A from below and is attached to the upper peripheral wall piece 411. The upper peripheral wall piece 411 is fixed to the upper surface 2111 of the hollow portion 211. The elastic member 511 of the dynamic vibration absorber 51 in the dynamic vibration absorbing device 5 is fixed to the lower peripheral wall piece 412. By fixing the upper peripheral wall piece 411 of the peripheral wall portion 41 to the upper surface 2111 of the hollow portion 211 in the hollow portion 211, the reinforcing steel body 4 can increase the strength of the floor panel 21 having the hollow portion 211. Moreover, the dynamic vibration absorber 51 is placed on the lower peripheral wall piece 412 so that the elastic member 511 of the dynamic vibration absorber 51 is fixed, and then the lower peripheral wall piece 412 is attached to the upper peripheral wall piece 411 with a screw SC or the like, so that the dynamic vibration absorber 5 can be easily installed within the internal space 41A of the peripheral wall portion 41.
補強鋼材本体４の周壁部４１において、上周壁片４１１は、長手方向Ｄ１に延び、中空部２１１内の中空部上面２１１１に固定される第１上板部４１１１と、長手方向Ｄ１に延び、第１上板部４１１１の両側端部のそれぞれに接続される一対の第２上板部４１１２と、を有する。一方、下周壁片４１２は、長手方向Ｄ１に延び、動吸振器５１の弾性部材５１１が固定される第１下板部４１２１と、長手方向Ｄ１に延び、第１下板部４１２１の両側端部のそれぞれに接続される一対の第２下板部４１２２と、を有する。 In the peripheral wall portion 41 of the reinforcing steel body 4, the upper peripheral wall piece 411 has a first upper plate portion 4111 that extends in the longitudinal direction D1 and is fixed to the upper surface 2111 of the hollow portion 211, and a pair of second upper plate portions 4112 that extend in the longitudinal direction D1 and are connected to both side ends of the first upper plate portion 4111. On the other hand, the lower peripheral wall piece 412 has a first lower plate portion 4121 that extends in the longitudinal direction D1 and is fixed to the elastic member 511 of the dynamic vibration absorber 51, and a pair of second lower plate portions 4122 that extend in the longitudinal direction D1 and are connected to both side ends of the first lower plate portion 4121.
補強鋼材本体４は、上周壁片４１１の第１上板部４１１１に設けられ、床パネル２１における複数のボルト孔２１２と連通可能な間隔を持って配置された複数の貫通孔４１１Ａを有している。図２に示されるように、補強鋼材本体４が床パネル２１の中空部２１１に挿入された状態では、複数の貫通孔４１１Ａが複数のボルト孔２１２と連通する。そして、中空部２１１に挿入された補強鋼材本体４の上周壁片４１１における第１上板部４１１１が中空部２１１内の中空部上面２１１１に当接した状態で、補強鋼材本体４が、各ボルト孔２１２及び各貫通孔４１１Ａに上方から挿通されたボルト９によって中空部上面２１１１に固定される。 The reinforcing steel body 4 is provided in the first upper plate portion 4111 of the upper peripheral wall piece 411, and has a plurality of through holes 411A arranged at intervals that allow communication with the plurality of bolt holes 212 in the floor panel 21. As shown in FIG. 2, when the reinforcing steel body 4 is inserted into the hollow portion 211 of the floor panel 21, the plurality of through holes 411A communicate with the plurality of bolt holes 212. Then, when the first upper plate portion 4111 of the upper peripheral wall piece 411 of the reinforcing steel body 4 inserted into the hollow portion 211 abuts against the hollow portion upper surface 2111 in the hollow portion 211, the reinforcing steel body 4 is fixed to the hollow portion upper surface 2111 by the bolts 9 inserted from above through each bolt hole 212 and each through hole 411A.
補強鋼材本体４を中空部２１１内の中空部上面２１１１に固定する際の固定方法は、特に限定されるものではない。本実施形態では、図２に示されるように、補強鋼材本体４には、ボルト９と螺合可能なねじ部を有するナット４１１Ｂが、上周壁片４１１の第１上板部４１１１における各貫通孔４１１Ａと連通可能な位置に形成されている。この場合、補強鋼材本体４は、各ボルト孔２１２及び各貫通孔４１１Ａに挿通されたボルト９がナット４１１Ｂのねじ部と螺合することによって中空部２１１内の中空部上面２１１１に固定される。 The method of fixing the reinforcing steel body 4 to the upper surface 2111 of the hollow portion 211 is not particularly limited. In this embodiment, as shown in FIG. 2, the reinforcing steel body 4 is provided with a nut 411B having a threaded portion that can be screwed into the bolt 9, at a position that can communicate with each through hole 411A in the first upper plate portion 4111 of the upper peripheral wall piece 411. In this case, the reinforcing steel body 4 is fixed to the upper surface 2111 of the hollow portion 211 by the bolt 9 inserted through each bolt hole 212 and each through hole 411A being screwed into the threaded portion of the nut 411B.
次に、床構造１における床パネル２１を含む床体２と床用補強鋼材３との関係性について、図４～図７を参照しながら説明する。 Next, the relationship between the floor structure 2 including the floor panel 21 and the floor reinforcing steel material 3 in the floor structure 1 will be explained with reference to Figures 4 to 7.
図５～図７に示されるように、床体２は、中間領域２１ＲＢの長手方向Ｄ１の長さ寸法であるパネル中間長さ寸法の異なる複数種の床パネル２１として、第１～第７床パネル２１Ａ～２１Ｇを含む。第１～第７床パネル２１Ａ～２１Ｇは、長手方向Ｄ１において、パネル中間長さ寸法がそれぞれ異なる値に設定される一方、一対の端部領域２１ＲＡの長さ寸法であるパネル端部長さ寸法については同一に設定されている。第１～第７床パネル２１Ａ～２１Ｇのそれぞれのパネル中間長さ寸法は、最小値として設定された最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの整数倍の値を加算した長さ寸法に設定される。 As shown in Figures 5 to 7, the floor body 2 includes first to seventh floor panels 21A to 21G as multiple types of floor panels 21 with different panel intermediate length dimensions, which are the length dimensions of the intermediate regions 21RB in the longitudinal direction D1. The first to seventh floor panels 21A to 21G have different panel intermediate length dimensions set to different values in the longitudinal direction D1, while the panel end length dimensions, which are the length dimensions of a pair of end regions 21RA, are set to the same. The panel intermediate length dimensions of each of the first to seventh floor panels 21A to 21G are set to a length dimension obtained by adding an integer multiple of the reference dimension LS to the minimum panel intermediate length dimension LPS, which is set as the minimum value.
具体的には、第１床パネル２１Ａは第１～第７床パネル２１Ａ～２１Ｇの中で最も小さい床パネルであり、第１床パネル２１Ａのパネル中間長さ寸法は最小パネル中間長さ寸法ＬＰＳに設定される。第１床パネル２１Ａにおいては、中間領域２１ＲＢがパネル全体の５０％を超える割合を占め、残りが一対の端部領域２１ＲＡとなる。すなわち、第１床パネル２１Ａのパネル中間長さ寸法で示される最小パネル中間長さ寸法ＬＰＳは、第１床パネル２１Ａの長手方向Ｄ１の全長の５０％を超えて１００％未満の値に設定される。例えば、最小パネル中間長さ寸法ＬＰＳは、第１床パネル２１Ａの長手方向Ｄ１の全長から一対の端部領域２１ＲＡの長さ寸法に相当するパネル端部長さ寸法の２倍の値を減算した値に設定される。最小パネル中間長さ寸法ＬＰＳは、第１床パネル２１Ａの長手方向Ｄ１の全長のおよそ７０％に相当する。例えば第１床パネル２１Ａの全長が４９０ｍｍであり、パネル端部長さ寸法が７０ｍｍの場合には、最小パネル中間長さ寸法ＬＰＳは、４９０ｍｍから７０ｍｍの２倍の１４０ｍｍを減算した３５０ｍｍに設定される。 Specifically, the first floor panel 21A is the smallest floor panel among the first to seventh floor panels 21A to 21G, and the panel intermediate length dimension of the first floor panel 21A is set to the minimum panel intermediate length dimension LPS. In the first floor panel 21A, the intermediate region 21RB accounts for more than 50% of the entire panel, and the remainder is the pair of end regions 21RA. That is, the minimum panel intermediate length dimension LPS indicated by the panel intermediate length dimension of the first floor panel 21A is set to a value that exceeds 50% and is less than 100% of the entire length of the first floor panel 21A in the longitudinal direction D1. For example, the minimum panel intermediate length dimension LPS is set to a value obtained by subtracting twice the value of the panel end length dimension corresponding to the length dimension of the pair of end regions 21RA from the entire length of the first floor panel 21A in the longitudinal direction D1. The minimum panel intermediate length dimension LPS corresponds to approximately 70% of the entire length of the first floor panel 21A in the longitudinal direction D1. For example, if the overall length of the first floor panel 21A is 490 mm and the panel end length dimension is 70 mm, the minimum panel intermediate length dimension LPS is set to 350 mm, which is 490 mm minus 140 mm, which is twice 70 mm.
また、基準寸法ＬＳは、第１床パネル２１Ａの長手方向Ｄ１の長さ寸法に基づいて設定され、第１床パネル２１Ａのパネル端部長さ寸法よりも大きく、且つ、最小パネル中間長さ寸法ＬＰＳよりも小さい値に設定される。例えば、基準寸法ＬＳは、第１床パネル２１Ａの長手方向Ｄ１の全長のおよそ５０％の値に設定され、第１床パネル２１Ａの全長が４９０ｍｍの場合には当該４９０ｍｍのおよそ５０％の２５０ｍｍに設定される。 The reference dimension LS is set based on the length dimension of the first floor panel 21A in the longitudinal direction D1, and is set to a value that is greater than the panel end length dimension of the first floor panel 21A and smaller than the minimum panel intermediate length dimension LPS. For example, the reference dimension LS is set to a value that is approximately 50% of the total length of the first floor panel 21A in the longitudinal direction D1, and if the total length of the first floor panel 21A is 490 mm, the reference dimension LS is set to 250 mm, which is approximately 50% of 490 mm.
第２床パネル２１Ｂは、パネル中間長さ寸法として、最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳを加算した値が設定される。第３床パネル２１Ｃは、パネル中間長さ寸法として、最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの２倍の値を加算した値が設定される。第４床パネル２１Ｄは、パネル中間長さ寸法として、最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの３倍の値を加算した値が設定される。第５床パネル２１Ｅは、パネル中間長さ寸法として、最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの４倍の値を加算した値が設定される。第６床パネル２１Ｆは、パネル中間長さ寸法として、最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの５倍の値を加算した値が設定される。第７床パネル２１Ｇは、パネル中間長さ寸法として、最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの６倍の値を加算した値が設定される。 The second floor panel 21B has a panel intermediate length dimension set to a value obtained by adding the minimum panel intermediate length dimension LPS to the reference dimension LS. The third floor panel 21C has a panel intermediate length dimension set to a value obtained by adding twice the reference dimension LS to the minimum panel intermediate length dimension LPS. The fourth floor panel 21D has a panel intermediate length dimension set to a value obtained by adding three times the reference dimension LS to the minimum panel intermediate length dimension LPS. The fifth floor panel 21E has a panel intermediate length dimension set to a value obtained by adding four times the reference dimension LS to the minimum panel intermediate length dimension LPS. The sixth floor panel 21F has a panel intermediate length dimension set to a value obtained by adding five times the reference dimension LS to the minimum panel intermediate length dimension LPS. The seventh floor panel 21G has a panel intermediate length dimension set to a value obtained by adding six times the reference dimension LS to the minimum panel intermediate length dimension LPS.
床体２がパネル中間長さ寸法の異なる複数種の第１～第７床パネル２１Ａ～２１Ｇを含むことに対し、床用補強鋼材３は、図５～図７に示されるように、第１～第７床パネル２１Ａ～２１Ｇと同数の複数の補強鋼材本体４として第１～第７補強鋼材本体４Ａ～４Ｇを含む。第１～第７補強鋼材本体４Ａ～４Ｇは、長手方向Ｄ１の長さ寸法である本体長さ寸法ＬＢが互いに異なっている。第１～第７補強鋼材本体４Ａ～４Ｇの本体長さ寸法ＬＢは、それぞれ、第１～第７床パネル２１Ａ～２１Ｇのパネル中間長さ寸法に対応して設定される。 While the floor structure 2 includes multiple types of first to seventh floor panels 21A to 21G with different panel mid-length dimensions, the floor reinforcing steel material 3 includes first to seventh reinforcing steel material bodies 4A to 4G as multiple reinforcing steel material bodies 4 in the same number as the first to seventh floor panels 21A to 21G, as shown in Figures 5 to 7. The first to seventh reinforcing steel material bodies 4A to 4G have different body length dimensions LB, which are the length dimensions in the longitudinal direction D1. The body length dimensions LB of the first to seventh reinforcing steel material bodies 4A to 4G are set to correspond to the panel mid-length dimensions of the first to seventh floor panels 21A to 21G, respectively.
第１補強鋼材本体４Ａは、第１床パネル２１Ａの中空部２１１に挿入されるものである。第１補強鋼材本体４Ａの本体長さ寸法ＬＢは、第１床パネル２１Ａのパネル中間長さ寸法として設定された最小パネル中間長さ寸法ＬＰＳと同値である。第２補強鋼材本体４Ｂは、第２床パネル２１Ｂの中空部２１１に挿入されるものである。第２補強鋼材本体４Ｂの本体長さ寸法ＬＢは、第２床パネル２１Ｂのパネル中間長さ寸法として設定された最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳを加算した値と同値である。第３補強鋼材本体４Ｃは、第３床パネル２１Ｃの中空部２１１に挿入されるものである。第３補強鋼材本体４Ｃの本体長さ寸法ＬＢは、第３床パネル２１Ｃのパネル中間長さ寸法として設定された最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの２倍の値を加算した値と同値である。第４補強鋼材本体４Ｄは、第４床パネル２１Ｄの中空部２１１に挿入されるものである。第４補強鋼材本体４Ｄの本体長さ寸法ＬＢは、第４床パネル２１Ｄのパネル中間長さ寸法として設定された最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの３倍の値を加算した値と同値である。第５補強鋼材本体４Ｅは、第５床パネル２１Ｅの中空部２１１に挿入されるものである。第５補強鋼材本体４Ｅの本体長さ寸法ＬＢは、第５床パネル２１Ｅのパネル中間長さ寸法として設定された最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの４倍の値を加算した値と同値である。第６補強鋼材本体４Ｆは、第６床パネル２１Ｆの中空部２１１に挿入されるものである。第６補強鋼材本体４Ｆの本体長さ寸法ＬＢは、第６床パネル２１Ｆのパネル中間長さ寸法として設定された最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの５倍の値を加算した値と同値である。第７補強鋼材本体４Ｇは、第７床パネル２１Ｇの中空部２１１に挿入されるものである。第７補強鋼材本体４Ｇの本体長さ寸法ＬＢは、第７床パネル２１Ｇのパネル中間長さ寸法として設定された最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの６倍の値を加算した値と同値である。 The first reinforcing steel body 4A is inserted into the hollow portion 211 of the first floor panel 21A. The body length dimension LB of the first reinforcing steel body 4A is the same as the minimum panel intermediate length dimension LPS set as the panel intermediate length dimension of the first floor panel 21A. The second reinforcing steel body 4B is inserted into the hollow portion 211 of the second floor panel 21B. The body length dimension LB of the second reinforcing steel body 4B is the same as the minimum panel intermediate length dimension LPS set as the panel intermediate length dimension of the second floor panel 21B plus the standard dimension LS. The third reinforcing steel body 4C is inserted into the hollow portion 211 of the third floor panel 21C. The body length dimension LB of the third reinforcing steel body 4C is the same as the minimum panel intermediate length dimension LPS set as the panel intermediate length dimension of the third floor panel 21C plus twice the standard dimension LS. The fourth reinforcing steel body 4D is inserted into the hollow portion 211 of the fourth floor panel 21D. The body length dimension LB of the fourth reinforcing steel body 4D is equal to the minimum panel intermediate length dimension LPS set as the panel intermediate length dimension of the fourth floor panel 21D plus three times the reference dimension LS. The fifth reinforcing steel body 4E is inserted into the hollow portion 211 of the fifth floor panel 21E. The body length dimension LB of the fifth reinforcing steel body 4E is equal to the minimum panel intermediate length dimension LPS set as the panel intermediate length dimension of the fifth floor panel 21E plus four times the reference dimension LS. The sixth reinforcing steel body 4F is inserted into the hollow portion 211 of the sixth floor panel 21F. The body length dimension LB of the sixth reinforcing steel body 4F is equal to the minimum panel intermediate length dimension LPS set as the panel intermediate length dimension of the sixth floor panel 21F plus five times the reference dimension LS. The seventh reinforcing steel body 4G is inserted into the hollow portion 211 of the seventh floor panel 21G. The body length dimension LB of the seventh reinforcing steel body 4G is equal to the minimum panel mid-length dimension LPS, which is set as the panel mid-length dimension of the seventh floor panel 21G, plus six times the reference dimension LS.
床用補強鋼材３が、第１～第７床パネル２１Ａ～２１Ｇと同数であって、本体長さ寸法ＬＢの異なる複数の第１～第７補強鋼材本体４Ａ～４Ｇを含むことに対し、床用補強鋼材３の動吸振装置５は、図４に示されるように、第１～第７補強鋼材本体４Ａ～４Ｇの数よりも少ない所定数の動吸振器５１として第１～第３動吸振器５１Ａ～５１Ｃを含む。動吸振装置５において、第１～第３動吸振器５１Ａ～５１Ｃは、錘部材５１２の長手方向Ｄ１の長さ寸法である錘長さ寸法ＬＷの違いに応じて固有振動数が異なっている。 While the floor reinforcing steel material 3 includes multiple first to seventh reinforcing steel body 4A to 4G with different body length dimensions LB, and the number of the reinforcing steel body 4A to 4G is the same as the number of the first to seventh floor panels 21A to 21G, the dynamic vibration absorbing device 5 of the floor reinforcing steel material 3 includes first to third dynamic vibration absorbers 51A to 51C as shown in FIG. 4, which is a predetermined number of dynamic vibration absorbers 51 that is less than the number of the first to seventh reinforcing steel body 4A to 4G. In the dynamic vibration absorbing device 5, the first to third dynamic vibration absorbers 51A to 51C have different natural frequencies according to the difference in the weight length dimension LW, which is the length dimension in the longitudinal direction D1 of the weight member 512.
第１～第３動吸振器５１Ａ～５１Ｃにおける錘部材５１２の錘長さ寸法ＬＷは、それぞれ、第１～第７補強鋼材本体４Ａ～４Ｇにおいて本体長さ寸法ＬＢが小さい第１～第３補強鋼材本体４Ａ～４Ｃの本体長さ寸法ＬＢに対応して設定される。第１動吸振器５１Ａの錘部材５１２の錘長さ寸法ＬＷは、第１補強鋼材本体４Ａの本体長さ寸法ＬＢと同様に、最小パネル中間長さ寸法ＬＰＳと同値である。第２動吸振器５１Ｂの錘部材５１２の錘長さ寸法ＬＷは、第２補強鋼材本体４Ｂの本体長さ寸法ＬＢと同様に、最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳを加算した値と同値である。第３動吸振器５１Ｃの錘部材５１２の錘長さ寸法ＬＷは、第３補強鋼材本体４Ｃの本体長さ寸法ＬＢと同様に、最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの２倍の値を加算した値と同値である。 The weight length dimension LW of the weight member 512 in the first to third dynamic vibration absorbers 51A to 51C is set to correspond to the body length dimension LB of the first to third reinforcing steel body 4A to 4C, which has the smaller body length dimension LB among the first to seventh reinforcing steel body 4A to 4G. The weight length dimension LW of the weight member 512 of the first dynamic vibration absorber 51A is the same as the minimum panel intermediate length dimension LPS, similar to the body length dimension LB of the first reinforcing steel body 4A. The weight length dimension LW of the weight member 512 of the second dynamic vibration absorber 51B is the same as the minimum panel intermediate length dimension LPS plus the reference dimension LS, similar to the body length dimension LB of the second reinforcing steel body 4B. The weight length dimension LW of the weight member 512 of the third dynamic vibration absorber 51C is equal to the minimum panel intermediate length dimension LPS plus twice the reference dimension LS, just like the body length dimension LB of the third reinforcing steel body 4C.
動吸振装置５に含まれる所定数の第１～第３動吸振器５１Ａ～５１Ｃは、錘部材５１２の錘長さ寸法ＬＷの違いと弾性部材５１１のばね定数に応じて固有振動数が異なっている。このため、動吸振装置５においては、所定数の第１～第３動吸振器５１Ａ～５１Ｃの組み合わせに基づいて、動吸振装置５の固有振動数を調整することが可能である。そして、図５～図７に示されるように、動吸振装置５では、第１～第７床パネル２１Ａ～２１Ｇにおける中間領域２１ＲＢの長さ寸法に対応した第１～第７補強鋼材本体４Ａ～４Ｇの本体長さ寸法ＬＢに応じて、第１～第７補強鋼材本体４Ａ～４Ｇのそれぞれに対して設けられる第１～第３動吸振器５１Ａ～５１Ｃの組み合わせが設定される。この際、第１～第７補強鋼材本体４Ａ～４Ｇのそれぞれに対して設けられる第１～第３動吸振器５１Ａ～５１Ｃの組み合わせは、動吸振装置５の固有振動数と対象とする床衝撃音の決定周波数に応じて設定される。 The predetermined number of first to third dynamic vibration absorbers 51A to 51C included in the dynamic vibration absorber 5 have different natural frequencies depending on the difference in the weight length dimension LW of the weight member 512 and the spring constant of the elastic member 511. Therefore, in the dynamic vibration absorber 5, it is possible to adjust the natural frequency of the dynamic vibration absorber 5 based on a combination of a predetermined number of first to third dynamic vibration absorbers 51A to 51C. As shown in Figures 5 to 7, in the dynamic vibration absorber 5, the combination of the first to third dynamic vibration absorbers 51A to 51C provided for each of the first to seventh reinforcing steel body 4A to 4G is set according to the body length dimension LB of the first to seventh reinforcing steel body 4A to 4G corresponding to the length dimension of the intermediate region 21RB in the first to seventh floor panels 21A to 21G. In this case, the combination of the first to third dynamic vibration absorbers 51A to 51C provided for each of the first to seventh reinforcing steel bodies 4A to 4G is set according to the natural frequency of the dynamic vibration absorber 5 and the target floor impact sound determination frequency.
すなわち、床構造１では、動吸振装置５は、第１～第７床パネル２１Ａ～２１Ｇにおける中間領域２１ＲＢの長さ寸法に対応した第１～第７補強鋼材本体４Ａ～４Ｇの本体長さ寸法ＬＢに応じて、所定数の第１～第３動吸振器５１Ａ～５１Ｃから選択された１又は複数の動吸振器５１を含む。 In other words, in the floor structure 1, the dynamic vibration absorbing device 5 includes one or more dynamic vibration absorbers 51 selected from a predetermined number of first to third dynamic vibration absorbers 51A to 51C according to the body length dimension LB of the first to seventh reinforcing steel body 4A to 4G, which corresponds to the length dimension of the intermediate region 21RB in the first to seventh floor panels 21A to 21G.
具体的には、図５に示されるように、第１床パネル２１Ａの中空部２１１に挿入され、本体長さ寸法ＬＢが最小パネル中間長さ寸法ＬＰＳと同値に設定された第１補強鋼材本体４Ａに対しては、錘長さ寸法ＬＷが最小パネル中間長さ寸法ＬＰＳと同値の錘部材５１２を有する第１動吸振器５１Ａのみから成る動吸振装置５が設けられる。第２床パネル２１Ｂの中空部２１１に挿入され、本体長さ寸法ＬＢが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳを加算した値と同値に設定された第２補強鋼材本体４Ｂに対しては、錘長さ寸法ＬＷが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳを加算した値と同値の錘部材５１２を有する第２動吸振器５１Ｂのみから成る動吸振装置５が設けられる。第３床パネル２１Ｃの中空部２１１に挿入され、本体長さ寸法ＬＢが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの２倍の値を加算した値と同値に設定された第３補強鋼材本体４Ｃに対しては、錘長さ寸法ＬＷが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの２倍の値を加算した値と同値の錘部材５１２を有する第３動吸振器５１Ｃのみから成る動吸振装置５が設けられる。 Specifically, as shown in Fig. 5, for the first reinforcing steel body 4A inserted into the hollow portion 211 of the first floor panel 21A and having a body length dimension LB set to the same value as the minimum panel intermediate length dimension LPS, a dynamic vibration absorbing device 5 consisting only of a first dynamic vibration absorber 51A having a weight member 512 whose weight length dimension LW is the same as the minimum panel intermediate length dimension LPS is provided. For the second reinforcing steel body 4B inserted into the hollow portion 211 of the second floor panel 21B and having a body length dimension LB set to the same value as the minimum panel intermediate length dimension LPS plus the reference dimension LS, a dynamic vibration absorbing device 5 consisting only of a second dynamic vibration absorber 51B having a weight member 512 whose weight length dimension LW is the same as the minimum panel intermediate length dimension LPS plus the reference dimension LS is provided. For the third reinforcing steel body 4C that is inserted into the hollow portion 211 of the third floor panel 21C and has a body length dimension LB set to the same value as the minimum panel intermediate length dimension LPS plus twice the reference dimension LS, a dynamic vibration absorbing device 5 consisting of only a third dynamic vibration absorber 51C having a weight member 512 whose weight length dimension LW is the same value as the minimum panel intermediate length dimension LPS plus twice the reference dimension LS is provided.
図６に示されるように、第４床パネル２１Ｄの中空部２１１に挿入され、本体長さ寸法ＬＢが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの３倍の値を加算した値と同値に設定された第４補強鋼材本体４Ｄに対しては、錘長さ寸法ＬＷが最小パネル中間長さ寸法ＬＰＳと同値の錘部材５１２を有する第１動吸振器５１Ａと、錘長さ寸法ＬＷが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳを加算した値と同値の錘部材５１２を有する第２動吸振器５１Ｂとの組み合わせから成る動吸振装置５が設けられる。第５床パネル２１Ｅの中空部２１１に挿入され、本体長さ寸法ＬＢが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの４倍の値を加算した値と同値に設定された第５補強鋼材本体４Ｅに対しては、錘長さ寸法ＬＷが最小パネル中間長さ寸法ＬＰＳと同値の錘部材５１２を有する第１動吸振器５１Ａと、錘長さ寸法ＬＷが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの２倍の値を加算した値と同値の錘部材５１２を有する第３動吸振器５１Ｃとの組み合わせから成る動吸振装置５が設けられる。 As shown in Figure 6, for a fourth reinforcing steel body 4D inserted into the hollow portion 211 of the fourth floor panel 21D and having a body length dimension LB set to a value equal to the minimum panel intermediate length dimension LPS plus three times the reference dimension LS, a dynamic vibration absorbing device 5 is provided which consists of a combination of a first dynamic vibration absorber 51A having a weight member 512 whose weight length dimension LW is equal to the minimum panel intermediate length dimension LPS, and a second dynamic vibration absorber 51B having a weight member 512 whose weight length dimension LW is equal to the minimum panel intermediate length dimension LPS plus the reference dimension LS. For the fifth reinforcing steel body 4E, which is inserted into the hollow portion 211 of the fifth floor panel 21E and has a body length dimension LB set to the same value as the minimum panel intermediate length dimension LPS plus four times the reference dimension LS, a dynamic vibration absorbing device 5 is provided, which is composed of a first dynamic vibration absorber 51A having a weight member 512 whose weight length dimension LW is the same as the minimum panel intermediate length dimension LPS, and a third dynamic vibration absorber 51C having a weight member 512 whose weight length dimension LW is the same as the minimum panel intermediate length dimension LPS plus two times the reference dimension LS.
図７に示されるように、第６床パネル２１Ｆの中空部２１１に挿入され、本体長さ寸法ＬＢが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの５倍の値を加算した値と同値に設定された第６補強鋼材本体４Ｆに対しては、錘長さ寸法ＬＷが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳを加算した値と同値の錘部材５１２を有する第２動吸振器５１Ｂと、錘長さ寸法ＬＷが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの２倍の値を加算した値と同値の錘部材５１２を有する第３動吸振器５１Ｃとの組み合わせから成る動吸振装置５が設けられる。第７床パネル２１Ｇの中空部２１１に挿入され、本体長さ寸法ＬＢが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの６倍の値を加算した値と同値に設定された第７補強鋼材本体４Ｇに対しては、錘長さ寸法ＬＷが最小パネル中間長さ寸法ＬＰＳに基準寸法ＬＳの２倍の値を加算した値と同値の錘部材５１２を有する第３動吸振器５１Ｃの２つが組み合わされて成る動吸振装置５が設けられる。 As shown in Figure 7, for a sixth reinforcing steel body 4F inserted into the hollow portion 211 of the sixth floor panel 21F and having a body length dimension LB set to a value equal to the minimum panel intermediate length dimension LPS plus five times the reference dimension LS, a dynamic vibration absorbing device 5 is provided which is composed of a second dynamic vibration absorber 51B having a weight member 512 whose weight length dimension LW is equal to the minimum panel intermediate length dimension LPS plus the reference dimension LS, and a third dynamic vibration absorber 51C having a weight member 512 whose weight length dimension LW is equal to the minimum panel intermediate length dimension LPS plus twice the reference dimension LS. For the seventh reinforcing steel body 4G that is inserted into the hollow portion 211 of the seventh floor panel 21G and has a body length dimension LB set to the same value as the minimum panel intermediate length dimension LPS plus six times the reference dimension LS, a dynamic vibration absorbing device 5 is provided that is composed of two third dynamic vibration absorbers 51C that have weight members 512 whose weight length dimension LW is the same value as the minimum panel intermediate length dimension LPS plus two times the reference dimension LS.
以上説明の通り、動吸振装置５の固有振動数と対象とする床衝撃音の決定周波数に応じるとともに、第１～第７床パネル２１Ａ～２１Ｇにおける中間領域２１ＲＢの長さ寸法に対応した第１～第７補強鋼材本体４Ａ～４Ｇの本体長さ寸法ＬＢに応じて、第１～第７補強鋼材本体４Ａ～４Ｇのそれぞれに対して設けられる第１～第３動吸振器５１Ａ～５１Ｃの組み合わせが設定される。これにより、所定数の第１～第３動吸振器５１Ａ～５１Ｃの組み合わせに基づき固有振動数が調整された動吸振装置５によって、中間領域２１ＲＢの長さ寸法の異なる複数種の第１～第７床パネル２１Ａ～２１Ｇが複雑に組み合わさった床構成であっても床衝撃音性能を決定づける帯域における制振性能を向上させることができる。このため、中間領域２１ＲＢの長さ寸法の異なる複数種の第１～第７床パネル２１Ａ～２１Ｇのそれぞれに対応して、衝撃力が加わることによる床衝撃音を幅広く抑制することができる。この結果、複数種の第１～第７床パネル２１Ａ～２１Ｇのそれぞれに対応して、重量床衝撃音の遮断性能を向上させることができる。 As explained above, the combination of the first to third dynamic vibration absorbers 51A to 51C provided for each of the first to seventh reinforcing steel bodies 4A to 4G is set according to the natural frequency of the dynamic vibration absorber 5 and the target floor impact sound determination frequency, and according to the main body length dimension LB of the first to seventh reinforcing steel body 4A to 4G corresponding to the length dimension of the intermediate region 21RB in the first to seventh floor panels 21A to 21G. As a result, the dynamic vibration absorber 5, whose natural frequency is adjusted based on a combination of a predetermined number of first to third dynamic vibration absorbers 51A to 51C, can improve vibration control performance in the band that determines floor impact sound performance, even in a floor configuration in which multiple types of first to seventh floor panels 21A to 21G with different length dimensions of the intermediate region 21RB are combined in a complex manner. Therefore, floor impact noise caused by impact force can be widely suppressed for each of the first to seventh floor panels 21A to 21G, which have different length dimensions of the middle region 21RB. As a result, the blocking performance of heavy floor impact noise can be improved for each of the first to seventh floor panels 21A to 21G.
しかも、複数種の第１～第７床パネル２１Ａ～２１Ｇのそれぞれの中空部２１１の内面に固定される第１～第７補強鋼材本体４Ａ～４Ｇが、各床パネルの中間領域２１ＲＢの長さ寸法と同値の本体長さ寸法ＬＢを有するとともに、長手方向Ｄ１に対する所定の曲げ剛性を有している。これにより、中空部２１１を有する複数種の第１～第７床パネル２１Ａ～２１Ｇのそれぞれの強度を高めることが可能となる。 Moreover, the first to seventh reinforcing steel bodies 4A to 4G fixed to the inner surface of the hollow portion 211 of each of the first to seventh floor panels 21A to 21G have a body length dimension LB that is equal to the length dimension of the intermediate region 21RB of each floor panel, and have a predetermined bending rigidity in the longitudinal direction D1. This makes it possible to increase the strength of each of the first to seventh floor panels 21A to 21G having a hollow portion 211.
なお、上述した具体的実施形態には以下の構成を有する発明が主に含まれている。 The specific embodiments described above mainly include the following:
第一の発明に係る床構造は、建物の床構造であって、所定の長手方向に延びる中空部を有する床パネルと、前記中空部内に挿入された床用補強鋼材と、を備える。前記床用補強鋼材は、前記中空部内で前記長手方向に延びる補強鋼材本体と、前記補強鋼材本体に固定された弾性部材と、前記長手方向に延びるとともに前記弾性部材に支持された錘部材とを有する動吸振器を含む動吸振装置と、を備える。前記補強鋼材本体は、前記中空部の内面に固定されている。 The floor structure according to the first invention is a floor structure for a building, and comprises a floor panel having a hollow portion extending in a predetermined longitudinal direction, and a floor reinforcing steel material inserted into the hollow portion. The floor reinforcing steel material comprises a reinforcing steel material main body extending in the longitudinal direction within the hollow portion, an elastic member fixed to the reinforcing steel material main body, and a dynamic vibration absorbing device including a dynamic vibration absorber having a weight member extending in the longitudinal direction and supported by the elastic member. The reinforcing steel material main body is fixed to the inner surface of the hollow portion.
第二の発明は、第一の発明に係る床構造において、前記床パネルは、前記長手方向の一方の端面から前記長手方向の所定範囲に設定され、切欠き部の形成を許容する一方側端部領域を有し、前記補強鋼材本体は、前記中空部内における前記長手方向の前記一方側端部領域以外の領域に設けられていてもよい。 The second invention is a floor structure according to the first invention, in which the floor panel has a one-side end region that is set within a predetermined range in the longitudinal direction from one end face in the longitudinal direction and allows the formation of a notch, and the reinforcing steel body may be provided in a region within the hollow portion other than the one-side end region in the longitudinal direction.
第三の発明は、第二の発明に係る床構造において、前記床パネルは、前記長手方向の他方の端面から前記長手方向の所定範囲に設定され、切欠き部の形成を許容する他方側端部領域を有し、前記補強鋼材本体は、前記中空部内における前記長手方向の前記一方側端部領域及び前記他方側端部領域以外の領域に設けられていてもよい。 The third invention is a floor structure according to the second invention, in which the floor panel has an other-side end region that is set within a predetermined range in the longitudinal direction from the other end face in the longitudinal direction and allows the formation of a notch, and the reinforcing steel body may be provided in an area within the hollow portion other than the one-side end region and the other-side end region in the longitudinal direction.
第四の発明は、第一から第三のいずれか一つの発明に係る床構造において、前記動吸振装置は、前記床パネルの前記長手方向の長さ寸法に対応した前記補強鋼材本体の前記長手方向の長さ寸法に応じて、１又は複数の前記動吸振器を含んでもよい。 The fourth invention is a floor structure according to any one of the first to third inventions, in which the dynamic vibration absorbing device may include one or more dynamic vibration absorbers depending on the longitudinal length dimension of the reinforcing steel body that corresponds to the longitudinal length dimension of the floor panel.
第五の発明は、第一から第四のいずれか一つの発明に係る床構造において、前記補強鋼材本体は、前記中空部内に挿入された状態で、前記中空部の内面において下方向を向く中空部上面に固定されてもよい。 In the fifth invention, in the floor structure according to any one of the first to fourth inventions, the reinforcing steel body may be fixed to the upper surface of the hollow portion facing downward on the inner surface of the hollow portion while inserted into the hollow portion.
第六の発明は、第一から第五のいずれか一つの発明に係る床構造において、前記補強鋼材本体は、前記長手方向に延びる軸を中心として内部空間を取り囲む周壁部を有し、前記動吸振装置は、前記内部空間内の前記周壁部に設けられてもよい。 The sixth invention is a floor structure according to any one of the first to fifth inventions, in which the reinforcing steel body has a peripheral wall portion that surrounds the internal space centered on an axis extending in the longitudinal direction, and the dynamic vibration absorbing device may be provided on the peripheral wall portion within the internal space.
第七の発明は、第六の発明に係る床構造において、前記補強鋼材本体は、前記周壁部の前記長手方向と直交する上下方向に沿った高さ寸法が、前記中空部の前記上下方向に沿った高さ寸法よりも小さい値に設定されてもよい。この場合、前記補強鋼材本体は、前記中空部の内面において下方向を向く中空部上面に固定された状態で、前記中空部の内面において前記中空部上面と対向する中空部下面との間に隙間が形成される。 The seventh invention is a floor structure according to the sixth invention, in which the height dimension of the reinforcing steel body in the vertical direction perpendicular to the longitudinal direction of the peripheral wall portion may be set to a value smaller than the height dimension of the hollow portion in the vertical direction. In this case, when the reinforcing steel body is fixed to the upper surface of the hollow portion facing downward on the inner surface of the hollow portion, a gap is formed between the upper surface of the hollow portion and the lower surface of the hollow portion facing the upper surface of the hollow portion on the inner surface of the hollow portion.
第八の発明は、第六又は第七の発明に係る床構造において、前記周壁部は、前記内部空間を上から覆い、前記中空部の内面において下方向を向く中空部上面に固定される上周壁片と、前記内部空間を下から覆うとともに前記上周壁片に取り付けられ、前記弾性部材が固定される下周壁片と、を有していてもよい。 The eighth invention is a floor structure according to the sixth or seventh invention, in which the peripheral wall portion may have an upper peripheral wall piece that covers the internal space from above and is fixed to the upper surface of the hollow portion facing downward on the inner surface of the hollow portion, and a lower peripheral wall piece that covers the internal space from below and is attached to the upper peripheral wall piece, to which the elastic member is fixed.
１ 床構造
２ 床体
２１ 床パネル
２１１ 中空部
２１１１ 中空部上面
２１１２ 中空部下面
２２ 切欠き部
３ 床用補強鋼材
４ 補強鋼材本体
４１ 周壁部
４１１ 上周壁片
４１２ 下周壁片
５ 動吸振装置
５１ 動吸振器
５１１ 弾性部材
５１２ 錘部材
Reference Signs List 1 Floor structure 2 Floor body 21 Floor panel 211 Hollow portion 2111 Hollow portion upper surface 2112 Hollow portion lower surface 22 Notch portion 3 Floor reinforcing steel material 4 Reinforcing steel material main body 41 Peripheral wall portion 411 Upper peripheral wall piece 412 Lower peripheral wall piece 5 Dynamic vibration absorbing device 51 Dynamic vibration absorber 511 Elastic member 512 Weight member
Claims (7)
所定の長手方向に延びる中空部を有する床パネルと、
前記中空部内に挿入された床用補強鋼材と、を備え、
前記床用補強鋼材は、
前記中空部内で前記長手方向に延びる補強鋼材本体と、
前記補強鋼材本体に固定された弾性部材と、前記長手方向に延びるとともに前記弾性部材に支持された錘部材とを有する動吸振器を含む動吸振装置と、を備え、
前記補強鋼材本体は、前記中空部の内面に固定されており、
前記床パネルは、前記長手方向の一方の端面から前記長手方向の所定範囲に設定され、切欠き部の形成を許容する一方側端部領域を有し、
前記補強鋼材本体は、前記中空部内における前記長手方向の前記一方側端部領域以外の領域に設けられている、床構造。 A floor structure of a building, comprising:
A floor panel having a hollow portion extending in a predetermined longitudinal direction;
A floor reinforcing steel material is inserted into the hollow portion,
The floor reinforcing steel material is
A reinforcing steel body extending in the longitudinal direction within the hollow portion;
a dynamic vibration absorbing device including a dynamic vibration absorber having an elastic member fixed to the reinforcing steel body and a weight member extending in the longitudinal direction and supported by the elastic member,
The reinforcing steel body is fixed to the inner surface of the hollow portion ,
the floor panel has a one-side end region that is set within a predetermined range in the longitudinal direction from one end face in the longitudinal direction and allows for the formation of a notch portion;
A floor structure , wherein the reinforcing steel body is provided in an area within the hollow portion other than the area of the one end portion in the longitudinal direction .
前記補強鋼材本体は、前記中空部内における前記長手方向の前記一方側端部領域及び前記他方側端部領域以外の領域に設けられている、請求項１に記載の床構造。 the floor panel has an other-side end region that is set within a predetermined range in the longitudinal direction from the other end face in the longitudinal direction and that allows for the formation of a notch portion;
2. The floor structure according to claim 1 , wherein the reinforcing steel body is provided in an area other than the one end area and the other end area in the longitudinal direction within the hollow portion.
前記動吸振装置は、前記内部空間内の前記周壁部に設けられる、請求項１に記載の床構造。 The reinforcing steel body has a peripheral wall portion surrounding an internal space centered on an axis extending in the longitudinal direction,
The floor structure according to claim 1 , wherein the dynamic vibration absorbing device is provided on the peripheral wall portion within the internal space.
所定の長手方向に延びる中空部を有する床パネルと、
前記中空部内に挿入された床用補強鋼材と、を備え、
前記床用補強鋼材は、
前記中空部内で前記長手方向に延びる補強鋼材本体と、
前記補強鋼材本体に固定された弾性部材と、前記長手方向に延びるとともに前記弾性部材に支持された錘部材とを有する動吸振器を含む動吸振装置と、を備え、
前記補強鋼材本体は、前記中空部の内面に固定されており、前記長手方向に延びる軸を中心として内部空間を取り囲む周壁部を有し、
前記動吸振装置は、前記内部空間内の前記周壁部に設けられ、
前記補強鋼材本体は、
前記周壁部の前記長手方向と直交する上下方向に沿った高さ寸法が、前記中空部の前記上下方向に沿った高さ寸法よりも小さい値に設定され、
前記中空部の内面において下方向を向く中空部上面に固定された状態で、前記中空部の内面において前記中空部上面と対向する中空部下面との間に隙間が形成される、床構造。 A floor structure of a building, comprising:
A floor panel having a hollow portion extending in a predetermined longitudinal direction;
A floor reinforcing steel material is inserted into the hollow portion,
The floor reinforcing steel material is
A reinforcing steel body extending in the longitudinal direction within the hollow portion;
a dynamic vibration absorbing device including a dynamic vibration absorber having an elastic member fixed to the reinforcing steel body and a weight member extending in the longitudinal direction and supported by the elastic member,
The reinforcing steel body is fixed to an inner surface of the hollow portion and has a peripheral wall portion surrounding an internal space about an axis extending in the longitudinal direction,
The dynamic vibration absorbing device is provided on the peripheral wall portion in the internal space,
The reinforcing steel body is
a height dimension of the peripheral wall portion along a vertical direction perpendicular to the longitudinal direction is set to a value smaller than a height dimension of the hollow portion along the vertical direction,
A floor structure in which , when fixed to a hollow portion upper surface facing downward on the inner surface of the hollow portion, a gap is formed between the hollow portion upper surface and the opposing hollow portion lower surface on the inner surface of the hollow portion.
所定の長手方向に延びる中空部を有する床パネルと、
前記中空部内に挿入された床用補強鋼材と、を備え、
前記床用補強鋼材は、
前記中空部内で前記長手方向に延びる補強鋼材本体と、
前記補強鋼材本体に固定された弾性部材と、前記長手方向に延びるとともに前記弾性部材に支持された錘部材とを有する動吸振器を含む動吸振装置と、を備え、
前記補強鋼材本体は、前記中空部の内面に固定されており、前記長手方向に延びる軸を中心として内部空間を取り囲む周壁部を有し、
前記動吸振装置は、前記内部空間内の前記周壁部に設けられ、
前記周壁部は、
前記内部空間を上から覆い、前記中空部の内面において下方向を向く中空部上面に固定される上周壁片と、
前記内部空間を下から覆うとともに前記上周壁片に取り付けられ、前記弾性部材が固定される下周壁片と、を有する、床構造。 A floor structure of a building, comprising:
A floor panel having a hollow portion extending in a predetermined longitudinal direction;
A floor reinforcing steel material is inserted into the hollow portion,
The floor reinforcing steel material is
A reinforcing steel body extending in the longitudinal direction within the hollow portion;
a dynamic vibration absorbing device including a dynamic vibration absorber having an elastic member fixed to the reinforcing steel body and a weight member extending in the longitudinal direction and supported by the elastic member,
The reinforcing steel body is fixed to an inner surface of the hollow portion and has a peripheral wall portion surrounding an internal space about an axis extending in the longitudinal direction,
The dynamic vibration absorbing device is provided on the peripheral wall portion in the internal space,
The peripheral wall portion is
An upper peripheral wall piece that covers the internal space from above and is fixed to an upper surface of the hollow portion that faces downward on the inner surface of the hollow portion;
A floor structure having a lower peripheral wall piece that covers the internal space from below and is attached to the upper peripheral wall piece, and to which the elastic member is fixed.
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|---|
| 三井住友建設株式会社，重量床衝撃音を低減させる工法「SST ボイドスラブ(R)」を適用 － 同調質量ダンパーによりスラブ厚を変えずに7dB低減を実現 ―"（タイトルの(R)は登録商標マークに置換），2022年04月19日，［2024年6月10日検索］，インターネット＜URL：https://www.smcon.co.jp/topics/assets/uploads/2022/04/release_20220419.pdf＞ |
| 金沢工業大学，"同調質量ダンパーによりスラブ厚を変えずに床の衝撃音を低減。 開発した工法「SSTボイドスラブ(R)」を建築物に初めて適用。 建築学科 山岸研究室、三井住友建設株式会社、三昌フォームテック株式会社" （タイトルの(R)は登録商標マークに置換），2022年04月19日，［2024年6月10日検索］，インターネット＜URL：https://www.kanazawa-it.ac.jp/kitnews/2022/0419_voidslab.html?_ga=2.40507361.293783516.1718006540-407653328.1718006540＞ |
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| JP2024042356A (en) | 2024-03-28 |
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