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전단변형을 고려한 DOUBLE DECK PLATE 의 해석
김영선(Young Sun Kim),우영택(Young Taek Woo),장석윤(Suk Yoon Chang) 한국강구조학회 1995 韓國鋼構造學會誌 Vol.7 No.2
Most of bridge decks and ship hull structures are composed of the double deck system. This paper introduces some methods of analysis of double deck plates with all edges clamped, reinforced by angled stiffeners including the effects of transverse shear deformation. One of practival methods of analysis of a plate problem is the finite difference technique. According to the numerical results, it is concluded to consider the effects of transverse shear deformation for small ratio of plate length to thickness. Behavior of double deck plate which is caused by the variation of stiffener angle are significant factors to be considered in the analysis of the double deck plate.
두꺼운 CORE 를 갖는 복합적층 SANDWICH 판의 해석
지효선(Hyo Seon Ji),우영택(Young Taek Woo),장석윤(Suk Yoon Chang) 한국강구조학회 1996 韓國鋼構造學會誌 Vol.8 No.2
Because of the relatively soft interlaminar shear modulus in high performance composite, the laminated plate theory based on the kirchhoff hypothesis becomes inaccurate for determining gross plate response of thick composites and a thick angle-ply, fiber-reinforced plastic(FRP) faced sandwich plate type with thick core. In this paper a procedure is developed for accurately calculating the mechanical behavior of sandwich plate type with thick core of arbitrary stacking sequences. The procedure is an extension of an existing laminate plate theory which includes the effect of transverse shear deformation and is easily computerized for design application with a minimum running time. The accuracy of the approach is ascertained by comparing solutions from the sandwich plate theory to the composite laminated plates theory including the effect of transverse shear deformations. Comparison study has also been made on laminated plates according to a First-order shear deformation theory(FSDT), Higher-order shear deformation theory(HSDT) and Classical plate theory(CPT).
프리스트레스트 콘크리트 가로보의 구조거동에 관한 실험적 연구
이승용 ( Lee Seung-yong ),김경태 ( Kim Kyong-tae ),최영준 ( Choi Young-joon ),우영택 ( Woo Young-taek ),정용휘 ( Jeong Yong-hwi ) 한국구조물진단유지관리공학회 2019 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.23 No.2
강아치교는 경간거리가 비교적 길고 거더 높이에 제약이 있는 가설조건에 자주 적용되는 교량형식이지만, 강아치교에서 강재 바닥틀(가로보, 세로보)이 차지하는 강중은 50% 이상으로 초기건설비용 증가의 원인으로 작용한다. 강아치교의 정체성은 살리면서 경제성 제고를 위해 강재 바닥틀을 콘크리트 부재로 대체시 획기적인 경제성 개선이 가능하다. 본 연구는 PSC 가로보의 아치교 적용을 위하여 PSC 가로보 시험체를 대상으로 정적시험 및 피로시험을 실시하고, 정적 구조 성능 및 피로성능을 분석함으로써 PSC 가로보의 구조안전성 및 사용성을 평가하였다. 그 결과 콘크리트 구조체, PS강선, 주철근, 브래킷, 연결부 모두 안정적인 구조거동을 보이고 있으며, 충분한 피로수명을 확보하고 있는 것을 확인하였다.
김응록,우영택,장석윤 서울시립대학교 산업기술연구소 1996 산업기술연구소논문집 Vol.4 No.-
Upto now, the railways have been constructed because of their rapidity and safety. In urban rigions, the construction of subway have been increasing because of the same reasons. The more subways are constructed, the more there are merits to overcome the traffic jam in urban traffic systems. But the vibration and noise of trains in subway is the interesting problems because they have the bad effects on the comfortable urban community. This study presents the cause of vibration and the correction factors of vibration by the analysis of the data from insitu dynamic experiments and measurement systems. The obtained data are ATHC's(Acceleration Time History Curve). The level values of vibration acceleration are estimated by analysis of ATHC using FFT and one-third Octave. The estimations of vibration by correction factor in the present study are closer to measured mode of vibration than existing formula of estimation. Specially, the estimation of vibration in this study is the fine results on double box section subway.