NUMERICAL ANALYSIS OF HEAVY WEIGHT FLOOR IMPACT SOUND OF VOID SLABS(Environmental Engineering)

Abstract

In a previous paper ， it was shown through the eigenvalue analysis that the finite element metbod with coupling of the in − plane and bending displace − ments ( caUed CIB −FEM ) is usefl 」l tbr the calculation of fioor impact sounds of void s！ abs ． In a present paper ， 由e heavy weight floor impact sound is directly calculated l〕y thedynamical analysis ofvoid slabs based on CIB − FEM and the characteristic ilnction method f ( )r ' the sound space analysis ． As the results ofthis study the fbllowings are revealed 、 The results of analysis on the void slab agree we 王 1 with the measured values ． The change in the acoustic radiation efficiency considerably aff6cts a level of 出e fioor impact sound of vQid slab ． The tleor 玉 mpact sound of the void siab is approximately deter − mined by the weigh！ of void， A conversion fbrmula of void slab into the equivalent slab thickness and unit weight gives the accurate results on 山e calculation of the fioor impact sound 、

Heavy-weight floor impact sound of a pure framed structure by field measurement and numerical calculation

“…A numerical calculation method [6,7] that combines vibration response analysis using the in-plane/out-of-plane coupled-type finite element method and radiation sound analysis using the wave function method [9] in a rectangular room was adopted to analyze heavy-weight floor impact sound. This numerical calculation method has the feature that a three-dimensional model can be treated as a two-dimensional one, and the validity of the analysis has been confirmed for various floor structures of beam slabs [6,7,10], voided slabs [11,12], and deck plate slabs in steel structure buildings [13].…”