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중량충격음 저감을 위한 벽식 및 중공슬래브 구조시스템의 진동 · 소음성능 실험
채지용(Ji-Yong Chae),박상기(Sang-Ki Park),허병욱(Byung-Wook Heo) 한국생활환경학회 2018 한국생활환경학회지 Vol.25 No.2
In South Korea, an apartment house is one of the most common types of residence. It causes discomfort to the residents and has made lots of social issues due to sharing the facilities. Especially, the interlayer noise caused by children’s running, which is classified as heavy weight impact sound, has become a major cause of conflicts between neighbors. In this study, a void slab system has been proposed to reduce the interlayer noise caused by heavy weight impact sound and compared to a typical wall system by means of characteristics of vibration and noise performance. Three specimens of multi-span slab system, based on the typical wall and the void slab system, have been built. Experiments for with and without resilient layer in both slab systems were carried out using a standard heavy weight impact source. The single number quantity was evaluated specified in the KS F 2863-2. The single number quantity for the wall system with and without the resilient layer was 3dB and 10dB higher than that of the void slab system, respectively. Finally, it has been confirmed that the proposed void slab system is more effective than the typical wall system in reducing interlayer noise problem.
진동차단재가 있는 벽식 구조 다스팬 실험체의 진동 · 소음 전달 특성
채지용(Chae, Ji-Yong),허병욱(Heo, Byung-wook) 대한건축학회 2019 대한건축학회 학술발표대회 논문집 Vol.39 No.1
Apartments represent the typical accommodation for over 60% of the South Korean population. However, as multiple families reside in units of the same building, conflict often arises between neighbors. In particular, floor-impact noise caused by walking or children running has become a social problem that demands alternative solutions. Impact sounds are caused by vibration transmitted through slabs or walls. In this study, an embedded resilient layer was used to reduce the transmission of vibration. The vibration of slab and walls of the specimen indicated different rates according to the frequency band. Below 100 Hz in the frequency, the slab showed large vibrations. Above 100 Hz, wall vibrations had a stronger impact. The experimental data showed that the vibrations and noises were transmitted to slabs and walls, especially heavy-weight floor-impact noises, were effectively reduced by an embedded resilient layer.
채지용(Chae, Ji-Yong),허병욱(Heo, Byung-Wook) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.1
The purpose of this study was to compare the heavy weight floor impact noise of structural system. The three kinds of experiment were carried out to compare the response of floor impact noise for apartment buildings. The single number quantities of a bang machine is calculated by the method of KS F 2863-2. In the experiment results, the heavy weight floor noise of the wall system was larger than void slab system about 3-11dB. It is shown that the natural frequency of system is effected to single number quantities. The composite system is indicated as an effective system by the experiment results.
U자형 프리캐스트 콘크리트 모듈러 접합부의 구조성능평가
최영한(Young Han Choi),채지용(Ji Yong Chae),허병욱(Byung Wook Heo) 한국방재학회 2023 한국방재학회논문집 Vol.23 No.6
U자형 프리캐스트 콘크리트 모듈러 접합부의 구조성능을 평가하기 위해 접합철물 인장실험과 벽체 반복가력실험을 실시하였다.접합철물 인장실험 결과, 철근이 L형강 단부에서 파단되었으며, 철근의 강도로 산정한 공칭강도 대비 최대하중의 비는 평균1.07로 나타났다. 벽체 반복가력실험 결과, PC 접합부가 1열인 PW-1R 실험체의 경우, 공칭휨모멘트에 대한 최대모멘트의비는 +방향 1.19, -방향 1.00으로 나타났다. PC 접합부가 2열인 PW-2R 실험체의 경우, 공칭휨모멘트에 대한 최대모멘트의 비는 +방향 1.20, -방향 1.06으로 나타났다. PC 접합부 벽체의 내력증가를 위해서는 접합철물의 연단거리 확보가 필요한것으로 판단된다. We conducted a joint tensile test and a wall cyclic loading test to assess the structural performance of the U-shaped precast concrete (PC) modular joint. The rebar experienced fracture at the edge of the L-shaped steel during the joint tensile test. The calculated average ratio of the maximum load to the nominal strength, based on the strength of the rebar, was 1.07. The result of the wall cyclic loading test showed that the PW-1R specimen, featuring a single row of PC joints, exhibited ratios of the maximum moment to a nominal bending moment of 1.19 and 1.00 in the positive (+) and negative (-) directions, respectively. Meanwhile, the ratios of the maximum moment to the nominal bending moment for the PW-2R specimen with two rows of PC joints were 1.20 and 1.06 in the positive (+) and negative (-) directions, respectively. The adequate edge distance for the joint hardware must be ensured to increase the strength of the PC joint wall.
이영욱(Young-Wook Lee),채지용(Ji-Yong chae) 한국항해항만학회 2012 한국항해항만학회지 Vol.36 No.3
본 연구에서는 수상위에 진수된 콘크리트 플로팅 폰툰에 상부골조를 단계별로 시공함에 따라 발생하는 추가 처짐이 상부골조에 발생하므로 추가변형에 의한 상부골조의 추가 모멘트량을 산정하는 해석절차를 제시하였으며 제시된 절차에 따라 3층 예제 철골 건물을 해석하고 분석하였다. 제시된 시공단계를 고려한 해석 방법과 비교하여, 폰툰의 변형을 고려하지 않는 해석 방법은 수직하중에 의한 변형을 무시하여 설계하중을 과소평가 하며, 플로팅 구조물을 전 층을 모델링하고 하중을 동시에 작용시키는 모델은 과대 처짐의 영향으로 설계하중을 과대평가함을 알게 되었다. In this research , the influence of additional vertical deformation of floating pontoon when dead load of each story is loaded during construction was investigated. The analysis procedure is presented for considering the influence of the additional deformation to calculate the additional moment of super-frame. Following the procedure, an example building with 3 storied steel frame was analyzed. Analysis method that taking no account for deformation of pontoon to the modeling was underestimated by ignoring design load following deformation of vertical load. By operating the load at the same time, design load under the influence of large deflection of model which whole modeling of floating structure was overestimated. So analysis method of floating structure considering the construction sequences demonstrated the suitable method.