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인장력을 받는 ㄱ형강 접합부의 감소계수 U값에 관한 연구
표영석,윤성호,나승욱,신영록,김보영,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
This study focuses on the inspect of effective net area design code, according to limited state design criteria of steel structures, recently established in Korea, by an experiment on the joint of angle tension members on the ground. reduction factor. The methods of this study were to compare other study results on effective net area rupture mode and ultimate capacity, and to evaluate the propriety of the criteria design code. The result is that code in force limited state design criteria of steel structures and AISC-LRFD joint of angle tension members predicted load and experiment depend on ultimate capacity difference. Therefore, it is thought that there is need for supplemental test and study to effective net area of tension joint focused on bolted connection of angle.
냉각수순환시스템 흡입구 주변의 보텍스 생성에 관한 연구
표영석(Youngseok Pyo),박영규(Youngkyu Park),이연원(Yeonwon Lee) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
There have been many studies on sump models but existing studies of pump sump models mainly validate fluid flow and vortex around a pump intake using a single-phase method. In this study, multi-phase method is used for observation of free surface vortex and cavitations occurring by air inhalation and water pressure drop. The purpose of this study is to compare the multi- phase model and the single-phase model to evaluate the difference of the multi-phase and the single-phase model. Also steady and unsteady simulations are conducted to verification the difference of results according to the analysis conditions. A pump sump of test model is calculated using CFD and the following points are analyzed. 1)The location and the behavior of the free-surface vortex and submerged vortex 2)The Velocity distribution at the pump intake, 3)The free-surface vortex in the multi- phase and single-phase method.
인장력을 받는 ㄷ형강 고력볼트 접합부의 감소계수 U값에 관한 연구
김진숙,표영석,나승욱,신영록,김보영,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
The purpose of this paper is to examine the influence of reduction coefficient according to the limit state design of steel structures in the bolted joints of tension members. It was carried out the tensile testing about high strength bolted connections performed in structural steel channels. Considered parameters are the number and row of bolts, the connection length, connection eccentricity of the specimen. The test results showed that failures generally came (a) classic net section, (b) block shear failures. We found that the professional factor, obtained by calculating the test failure load divided by the nominal specification strength, is lower than 1.00. We thought that the reason was the moment produced by eccentric loading depends upon the connection geometry as well as the rotational stiffness of the connection.
식별실험 모델에 대한 H<sub>2</sub> 제어기의 설계 및 검증
이승준 ( Lee Seung-jun ),민경원 ( Min Kyung-won ),주석준 ( Ju Suk-jun ),김홍진 ( Kim Hongjin ),최문식 ( Choi Mun-sick ),표영석 ( Pyo Young-suk ) 한국구조물진단유지관리공학회 2003 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.7 No.1
This paper discusses H<sub>2</sub> for t optimal control of civil structures under seismic loads. Numerical simulations and an experiment performed on a three-story structure with Active Mass Driver (AMD), which is experimentally identified. Control effectiveness of the controller for the suppression of each floors acceleration responses is investigated when control force is used. Simulation results indicate that H2 controller is efficient for reduction responses.
이승준(Lee Seung-Jun),민경원(Min Kyung-Won),주석준(Ju Suk-Jun),김홍진(Kim Hongjin),최문식(Choi Mun-sick),표영석(Pyo Young-Suk) 한국구조물진단유지관리학회 2003 한국구조물진단학회 학술발표회논문집 Vol.- No.-
This paper discusses H₂for t optimal control of civil structures under seismic loads. Numerical simulations and an experiment performed on a three-story structure with Active Mass Driver (AMD), which is experimentally identified. Control effectiveness of the controller for the suppression of each floors acceleration responses is investigated when control force is used. Simulation results indicate that H₂controller is efficient for reduction responses.