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부착식 후 설치 앵커로 연결된 캔틸레버보에 대한 실험적 평가
오홍섭,박성락 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.2011 No.9
Recently, there has been a growing interest in expanded sidewalks for bridges within the country. This paper deals with how to optimize the sections of existing cantilever part through the evaluation study of the structured behavior so that the efficiency of the sections is established and the cost cutting of the volume for the unnecessary need of anchor bolts is expected. In its final analysis, it is supposed that there would be some possibilities to improve workability, safety, and economics compared to the existing construction methods.
차량 충돌을 받은 콘크리트 방호벽의 비선형 해석에 관한 연구
오홍섭,김영환,심재원,오광진,Oh. Hongseob,Kim. Young Hwan,Sim. Jae-Won,Oh. Kwang-ChinJin 한국방재학회 2013 한국방재학회논문집 Vol.13 No.5
도로방호시설의 설계는 차량과 탑승객의 안전뿐만 아니라 안전시설의 손상에 따른 이차 사고 역시 고려하여야 한다. 그러나 지금까지의 연구들은 안전시설의 파괴현상에 대한 연구들은 거의 이루어지지 않고 있다. 본 연구에서는 콘크리트 방호벽에 14ton 트럭 충돌 실험을 실시하고, 비선형 유한요소해석을 실시하여 결과를 분석하고, 콘크리트 강도 및 철망 보강과 같은 상세에 대한 변수해석을 수행하였다. 실험결과 콘크리트 방호벽 상면에 폭 50 cm, 높이 15 cm 정도의 파손이 발생하였으며, 해석에서도 실험결과를 잘 모사하였다. 다른 조건들에 대한 해석결과 콘크리트 강도가 높아질수록 방호벽의 손상 정도가 감소하는 것으로 나타났으며, 철망의 보강 높이는 국부손상에 거의 영향을 미치지 않는 것으로 분석되었다. Design of barrier should be consider the secondary accident caused by a fracture of road safety facilities as well as the safety of vehicles and passengers, but few researches have not conducted on the failure phenomenon of the safety facilities. In this study, the impact test of a 14-ton truck to a concrete barrier was conducted, and then analyzed non-linear behavior of a barrier by FEA. This work also investigates the fracture phenomena of concrete barriers on different detailing such as concrete strength and reinforcement of wire mesh. The collision tests revealed that local fracture with 50 cm in width and 15 cm in height was found in the upper part of a concrete barrier, and the result of analysis was well simulated the test. Also, the interpretations on the different parameters showed that, with respect to concrete strength, the higher the strength of a concrete barrier was, the lower the width of its local fracture and scaling damage was, and that the height of wire-mesh insignificant affected a reduction in local fracture width of a protection wall and its fracture height.
오홍섭(Oh, Hong Seob),김수지(Kim, Su Jl) 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.15 No.1
FRP rebars could be deteriorated by concrete alkalinity. This paper focuses on the evaluation of durability of FRP rebars with ribs exposed to alkaline environment of concrete. In this study, the effect of deformed type, surfaced braided type, sand coated type GFRP, CFRP, Hybrid FRP in the ribs on the durability of FRP rebar is investigated through ISS testss.
파형강판 연결부 상세에 따른 이음부 강도 평가에 대한 실험적 연구
오홍섭(Oh, Hong-seob),남기욱(Nam, Ki-wook) 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.15 No.1
According to the rise of Corrugated Steel Plate, the research about Corrugated Steel Plate has recently been very much a work in progress. Nevertheless, the analysis of the connection is in an inadequate situation. Therefore, it deals with the effect of the intensity on Connection Detailing. Based on the preceding research findings, the analysis illustrates the compressive properties: the ultimate strength and the yield stress of the connection for D22, gasket, slot hole, and washer in accordance with the connection Detailing.