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김정환(Kim, Jung-Hwan),정호성(Jeong, Ho-Seong),김형준(Kim, Hyeong-Jun),한정헌(Han, Jung-Hun),박선규(Park, Sun-Kyu) 한국구조물진단유지관리학회 2010 한국구조물진단학회 학술발표회논문집 Vol.2010 No.2
In case of design of long bridge structure, there are a lot of possibilities that the object of this study is to estimate the design wind loads for mega long bridge. There are no domestic standard when long bridge is designed, so other countries's standard are used in Korea for long bridge design. In this paper, based on wind speed date at ovservatories in Korea from 1971 through 2009, the basic wind speeds which can be utilized in designing mega long bridge are estimated using the statiscal process. The wind speeds for 200 year's return period in 24 locations are determined using the Gumbel's distribution and then these result compared to the existing design codes for long bridge.
유전 알고리즘을 활용한 크기에 따른 초고성능 콘크리트의 인장 거동
이석인(Lee, Seok-In),정호성(Jeong, Ho-Seong),이상훈(Lee, Sang-Hoon),이윤정(Lee, Yoon-Jung),할리오나(Darkhanbat Khaliunaa),김강수(Kim, Kang Su) 한국콘크리트학회 2021 한국콘크리트학회 학술대회 논문집 Vol.33 No.2
이 연구에서는 초고성능 콘크리트의 인장거동에 대한 실험적 연구를 수행하였다. 크기를 변수로 하는 3개의 UHPC 실험체들을 제작하고 3점 가력 휨 실험을 수행하였다. 실험 결과를 토대로 역분석 방법(Inverse analysis)과 유전 알고리즘(Genetic algorithm)을 활용하여 각 실험체들의 응력-변형률 곡선을 도출하였으며, 이를 상세히 비교·분석하였다. In this study, experiments were carried out to evaluate the tensile behavior of ultra-high performance concrete (UHPC). A total of three specimens were fabricated with the specimen size as a variable. Through the 3-point bending tests, the stress-strain relationships of specimens were derived using inverse analysis and genetic algorithm, and they were compared and analyzed in details.
이장무(Lee Chang-Mu),이한민(Lee Han-Min),한문섭(Han Moon-Seob),김주락(Kim Joo-Rak),정호성(Jung Ho-Seong) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
The primary objective of this paper is to examine the capacity of electrical transmission in electric railway feeding system. Although supply capacity of railway substation are sufficient and there is no accident, due to the electrical transmission limit of feeding line the voltage breakdown may occur when large capacity of electric load at feeding line exist. So, using multi-port analysis model, we draw P-V curve due to the length of feeding line, load, location and power factor of electric locomotive. And through case study, compare measurement result and simulation result.