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김태민,박시현,김민준,곽병창 대한건축학회 2023 대한건축학회논문집 Vol.39 No.9
국내 공동주택 바닥충격음이 점차 사회적 이슈로 부각되면서, 바닥충격음 저감을 위해 기둥식 구조에 대해 관심이 증가하고 있다. 본 연구는 공동주택의 구조양식에 따른 바닥충격음 발생 메커니즘을 분석하기 위해 실증실험을 수행하였으며, 바닥충격음이 발생되었을 때 진동 거동(ODS)를 분석하기 위해 전산해석을 수행하였다. 실증주택을 대상으로 실험을 진행한 결과 기둥식 구조의 바닥충격음이 벽식구조에 비해 더 큰 것으로 나타났다. 모달 테스트 수행 결과, 기둥식 구조의 경우 진동 응답이 큰 저차 모드가 바닥충격음 측정 대역 이전에 발생되는 것으로 나타났으며, 빔 내부 형상에 의한 진동 모드는 측정 대역에 존재하는 것으로 나타났다. 본 연구결과를 토대로, 기둥식 구조에서는 유효평면이 빔의 위치에 의해 결정되기 때문에, 빔 설계를 통해 바닥충격음 발생 저감이 가능할 수 있을 것으로 판단된다. In South Korea, floor impact noise in multi-family residential buildings has become a growing concern. Specifically, there is interest inreducing floor impact noise in apartment buildings with a column-beam structure. This research conducted full-scale experiments to examinehow floor impact noise is generated in different types of structures and utilized computational analysis to understand the vibration behaviorknown as ODS of the floor slab during floor impact noise occurrences. The results of the full-scale experiments revealed that thecolumn-beam type apartment units had higher levels of floor impact noise compared to wall-type units. Additionally, through modal testing, itwas observed that the column-beam type exhibited a low-frequency mode with significant vibration response within the floor impact noisemeasurement range. Furthermore, a vibration mode stemming from the internal structure of the beam was present within this measurementrange as well. Based on these research findings, it is possible to reduce floor impact noise generation by optimizing beam design. Theeffective performance of the floor is influenced by the position and characteristics of the beams in column-beam structured buildings.
김태민,홍공현,한병성,두호익,Kim, Tae-Min,Hong, Gong-Hyun,Han, Byung-Sung,Du, Ho-Ik 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.10
When an abnormal condition occurs due to a fault current at a consumer location where electricity is supplied through high-Tc superconducting(HTS) cable, the HTS cable would be damaged if there is no appropriate method to protect it. The fault-current-limiting type HTS cable that is suggested in this study has a structure of transport part and limit part. It conduct a zero impedance transport current at ordinary operations and carry out a fault current limiting at extraordinary operations. To make a perfect this structure, it is essential to investigate electrical properties of transport part that comprise the fault-current-limiting type HTS cable. In this paper, transport part that comprise HTS wire with copper stabilization layer is examined the current transport properties and the stability evaluation.