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강호용,박미룡,이승식,신창섭,박찬원,Kang, H.Y.,Park, M.R.,Lee, S.S.,Shin, C.S.,Park, C.W. 한국전자통신연구원 2021 전자통신동향분석 Vol.36 No.5
Owing to various restrictions in-field application, the low-speed, low-power-based industrial Internet-of-Things (IoT) network built in extremely harsh industrial environment sites requires multi-hop, channel hopping, and low-latency transmission characteristics. In the past, wired networks were used in industrial facilities; however, network technologies based on the Industrial IoT Network standard standardized for industrial applications, such as WirelessIO link, WirelessHART, SmartMesh, and eStar Link satisfy industrial requirements. Recently, the use of industrial IoT networks in industrial facilities has rapidly expanded. This paper covers the developments in industrial IoT network technologies and summarizes the major industrial IoT standard technologies that meets the requirements of industrial sites.
외부긴장재의 정착위치에 따른 거더의 인장플랜지 국부응력변화 분석
남정훈 ( J. H. Nam ),최훈 ( H. Choi ),박주경 ( J. K. Park ),이승식 ( S. Lee ),윤순종 ( S. J. Yoon ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.2
In this paper, we discussed the external prestressing technique to strengthen the deteriorated steel-concrete composite bridge girder. In this technique, the tension flange of steel girder needs to make a hole to install anchorage system. In this case, the tension flange of girder may experience the local stress change, stress concentration around the hole, and yielding of the flange material. As a part of continuing research pertaining to the structural behavior of deteriorated steel girder, we focussed on the local stress change of tension flange with holes for anchorage system. From this investigation it was found that the hole drilled on the flange under tension due to self-weight and sustained live load affects the stress change of flange significantly.
외부긴장재의 정착위치에 따른 거더의 인장플랜지 국부응력변화 분석
남정훈(J.H. Nam),최훈(H. Choi),박주경(J.K. Park),이승식(S. Lee),윤순종(S.J. Yoon) 한국구조물진단유지관리학회 2004 한국구조물진단학회 학술발표회논문집 Vol.- No.-
In this paper, we discussed the external prestressing technique to strengthen the deteriorated steel-concrete composite bridge girder In this technique, the tension flange of steel girder needs to make a hole to install anchorage system. In this case, the tension flange of girder may experience the local stress change, stress concentration around the hole, and yielding of the flange material. As a part of continuing research pertaining to the structural behavior of deteriorated steel girder, we focussed on the local stress change of tension flange with holes for anchorage system. From this investigation It was found that the hole drilled on the flange under tension due to self-weight and sustained live load affects the stress change of flange significantly.