JP2019052435A - 遮音界床構造の構築方法、設計方法および建物の遮音界床構造 - Google Patents
遮音界床構造の構築方法、設計方法および建物の遮音界床構造 Download PDFInfo
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Abstract
【解決手段】床スラブ10の上部に防振支承12を介して浮床層13を配置することで界床での遮音性向上を図るための遮音界床構造において、浮床層を構成する床板の小割床板13a〜13cの固有振動数fが特定の計算式を満たすように寸法・密度・曲げ剛性を決定し、設置されるものとする。ただし、小割床板の縦長さ、横長さ、厚さの各寸法をa、b、h(m)とし、床板材質のヤング率をE(N/m2)、密度をρ(kg/m3)とすると、小割床板の固有振動数(最小値)は特定の計算式で与えられる。
【選択図】図1
Description
ただし、前記小割床板の縦長さ、横長さ、厚さの各寸法をa、b、h(m)とし、前記床板の材質のヤング率をE(N/m2)、密度をρ(kg/m3)とすると、前記小割床板の固有振動数(最小値)は以下の式(2)で与えられる。
ただし、
m:面密度(kg/m2)、E:ヤング率(N/m2)、I:断面2次モーメント(m4)
ただし、前記小割床板の縦長さ、横長さ、厚さの各寸法をa、b、h(m)とし、前記床板の材質のヤング率をE(N/m2)、密度をρ(kg/m3)とすると、前記小割床板の固有振動数(最小値)は以下の式(2)で与えられる。
ここで、板の縦横長さ・厚さをa、b、h(m)とし、板の材質の曲げ剛性をD(均質単板ではD=EI、ヤング率をE(N/m2)、単位幅当たりの断面2次モーメントI=h3/12(m3))、密度をρ(kg/m3)とし、m、nはそれぞれ板の長さa,b方向での半波数を示す。
E=2.4×1010 N/m2
ρ=2400 kg/m3
11 第1の遮音界床構造
12 防振材、防振支承
13 浮床層
13a,13b,13c 小割床板
14 支持脚
15 パーティクルボード
16 フローリング
21 第2の遮音界床構造
22 クッション層
23 合板
Claims (8)
- 前記小割床板を密度ρ=1500〜2500kg/m3の材質とし、前記小割床板の寸法をa,b≦1.5m、h≧0.05mとする請求項1または2に記載の遮音界床構造の構築方法。
- 複数枚の前記小割床板を隣接して配置し、前記隣接する小割床板が互いに分離したままの状態で前記浮床層が構築される請求項1〜5のいずれか1項に記載の遮音界床構造の構築方法。
- 請求項1〜6のいずれか1項に記載の遮音界床構造の構築方法により構築された建物の遮音界床構造。
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JP2021143545A (ja) * | 2020-03-13 | 2021-09-24 | 東急建設株式会社 | 乾式二重床構造 |
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JP7266005B2 (ja) | 2020-03-13 | 2023-04-27 | 東急建設株式会社 | 乾式二重床構造 |
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