STUDY ON THE FLOOR IMPACT SOUND OF VOID SLABS BY EIGENVALUE ANALYSIS : Analysis on the floor impact sound of void slabs by FEM with coupling of in-plane and bending displacement

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  • HASHIMOTO Norihisa
    Dept. of Architecture, Faculty of Engineering, Hachinohe Institute of Technology

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Other Title
  • 固有値解析によるボイドスラブの床衝撃音遮断性能評価 : 面内面外変位連成型有限要素法によるボイドスラブの床衝撃音解析 その1
  • コユウチ カイセキ ニ ヨル ボイドスラブ ノ ユカショウゲキオン シャダン セイノウ ヒョウカ メン ナイメン ガイ ヘンイレン セイケイ ユウゲン ヨウソホウ ニ ヨル ボイドスラブ ノ ユカショウゲキオン カイセキ ソノ 1

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In a present paper, floor impact sounds of void slabs are numerically studied using FEM with coupling of the in-plane and bending displacements developed before by author. This method has a feature that a three dimensional model can be treated as a two dimensional one. Eigenvalue analysis on the void slabs was carried out due to this program and the changes in natural frequencies were examined. When the total amount of the void is constant, the magnitudes of flexural rigidity and dynamical response of the void slabs were not varied by the patterns of void layout, and the increase in dynamical response is not so much in case of the ratio of the void in the slab becomes over 60 %. In addition, the calculation method of the equivalent thickness on void slabs is newly proposed based on the area of the void. Through these studies, it has been revealed that the void slabs are considerably advantageous construction.

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