An Experimental Study on the Vibration Response Characteristics of Floating Floor Systems for Heavyweight Impact Noise Reduction.

바닥충격음 차단을 위한 뜬바닥 구조의 진동응답특성에 관한 실험적 연구

  • 최경석 (롯데건설(주) 기술연구원) ;
  • 석원균 (롯데건설(주) 기술연구원) ;
  • 목지욱 (롯데건설(주) 기술연구원) ;
  • 신이섭 (서울시립대학교 건축공학과) ;
  • 김형준 (서울시립대학교 건축공학과) ;
  • 김정진 (롯데건설(주) 기술연구원)
  • Published : 2023.11.10

Abstract

A floating floor generally consists of mortar bed separated from the structural RC slab by a continuous resilient layer. It is known that the floating floors are a type of vibration-isolation system to improve the impact sound insulation performance. However, some researchers have demonstrated that the amplification of vibration response at a specific range of frequencies results in an increase in the impact sound level. This study carried out the forced vibration tests to obtain the frequency response function (FRF) of a floating floor compared with a bare RC slab. Test results shows that the additional peak occur in vibrational spectrum of the floating floor except natural vibration modes of the bare RC slab. This is because the relatively flexible resilient material and mass of the mortar bed offer an additional degree of freedom in the structural system. Therefore, it could be efficient for reduction of floor impact vibration and noise to control the additional mode frequency and response of floating floors.

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Acknowledgement

본 논문은 2023년롯데건설(주)의 연구과제인 "바닥구조 동특성 분석 및 해석 기법 정립"의 일환으로 수행된 연구 결과임을 밝히며 이에 감사를 드립니다.

References

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  2. 양홍석, 김태민. 공동주택 뜬바닥 구조층 구성에 따른 바닥충격음 차단성능 실험적 연구. 한국소음진동공학회논문집. 2020. 제30권 2호. p. 119-128.  https://doi.org/10.5050/KSNVE.2020.30.2.119