Investigations on the Prediction Method of Floor Impact Sound for Large-Span Slabs Forcused on Aspect Ratio of Slab Plan

Abstract

According to the development of structura1 desigri ， the varieties of 1arge Span ． slab are increasing． In this paper ， the effects and the prediction method are investigated to floor impact sound of the elimination of beams that 111akes aspect ratio of slab area more than 2 to 6 ． The high aspect ratio slabs are effeciive fer the heaVy − weight floor impact sound because of high mQde density around the first natural frequency was shown ． And from the view of prediction， puttilg the average of the transfer impedance of slab derived from FEM vibr 自 tion analysis into the impedance method agreed fairly well to the measured values ． Keywords： floor impact sound ， impedance ， la rge span ， multi − family dwellings