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EPS 완충재의 동탄성계수 및 두께에 따른 중량 바닥충격음 레벨 분석
송국곤,김용희,류종관,김명준 한국소음진동공학회 2018 한국소음진동공학회 논문집 Vol.28 No.6
This study investigated the relationship between dynamic stiffness, thickness, and heavy-weight floor-impact sound level for EPS resilient materials with 10MN/m3~30MN/m3 dynamic stiffness and 10mm~30mm thickness. As a result, the single-number quantity (SNQ) with a bang machine was 52dB~57dB, SNQ with rubber ball at 1.0m height was 48dB~52dB, and SNQ with rubber ball at 0.3m was 43dB~48dB. The relationship between dynamic stiffness and SNQ with bang machine was a negative correlation, and that with a rubber ball was a positive correlation. The floor impact sound level at 63Hz showed a negative correlation with dynamic stiffness, and those at 125Hz and 250Hz showed positive correlations for all impact sources. The thickness of EPS resilient materials was negatively correlated with floor-impact sound level over 125Hz for all impact sources. In addition, a design method of EPS resilient materials is discussed using a contour map of floor-impact sound level in terms of thickness and dynamic stiffness.
바닥충격음 완충재의 동탄성계수 현장 측정방법에 관한 기초적 연구
송국곤,이원학,김용희,류종관 한국건축친환경설비학회 2019 한국건축친환경설비학회 논문집 Vol.13 No.1
This study is a fundamental study on the method of measuring the dynamic stiffness of the resilient material for floor impact sound reduction at the construction site. The resilient material is one of the factors which greatly influencing the floor impact sound performance of the apartment house. This study tried to find a method to measure the dynamic stiffness of the resilient material directly in the field. The results of the measurements in the laboratory condition were compared with those in the non - trimmed condition at the concrete slab. And, the dynamic stiffness of the cement mortar load plate preliminarily prepared on the resilient material was measured and compared with the laboratory measurement results. As a result of the measurement, it was confirmed that the measurement of dynamic stiffness is possible because there is little difference between the measurement result using the steel load plate on the steel base plate in laboratory and on the concrete slab. The dynamic stiffness measured by the cement mortar loading plate on the concrete slab was different from the laboratory results, which is considered to depend on the weight per unit area of the load plate. In the future, it is possible to confirm the dynamic stiffness of the resilient material before construction of the resilient material at the construction site of the apartment building by deriving the correction value calculation formula by confirming the changing trend in the dynamic stiffness measurement result by the weight per unit area of the load plate.