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인공경량골재를 이용한 철도 흡음블록의 흡음특성에 관한 연구
강덕만(Kang Duck-Man),서재원(Seo Jae-Won),이인용(Lee In-Yong),박용걸(Park Yong-Gul) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
This study is designed to manufacture the upgraded sound absorption concrete by using foamed concrete by using artificial light weight aggregate which raises the continuous void ratio to increase the sound absorption ratio and improve the strength. In manufacturing the sound absorption block, the pre-foaming form is applied to generate continuous voids, controlling the density by the addition of bubbles. It is general that the more porosity creates, the weaker strength becomes. Each of specimens are used for this experiment and measured their absorption ratio to examine the absorption property depending on frequency. As a results of experiment, it is evaluated that the absorption capacity of the sound absorption block has relation to compression strength and surface shape.
강덕만(Kang Duck-Man),안해영(An Hea-Young),성덕룡(Sung Deok-Yong),김성일(Kim Sung-Il),박용걸(Park Yong-Gul) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
This study is objected by analyzing whether it is applied to the analysis model considering the track stiffness or not when the railway bridge is designed or reviewed for the dynamic stability. It is performed that the analysis model is verified by comparing the field test result with the analysis result. Also, The dynamic response of railway bridge through the existing analysis model is compared with the analysis model considered the track stiffness. In addition, it is performed by analyzing the model considering the stiffness of concrete track. Therefore, this study is suggested that the design of railway bridge apply to the existing analysis model considering the mass of track and the dynamic stability review of railway bridge apply to it considered the stiffness & mass of track. Also, it is suggested that the stiffness of concrete slab on the bridge must consider when it is designed or checked over the dynamic stability.