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최형화,김우범 대한건축학회지회연합회 2008 대한건축학회지회연합회 학술발표대회논문집 Vol.2008 No.1
Recently, using 600㎫ steel tube connection having the structural advantage over large scale structure and high-rise building has increased. However, research on 600㎫ steel tube connection is currently lacking. Therefore, stability of use of previous steel tube strength of connection formula(KBC 2008) was compared and examined when strength of 600㎫ steel tube connection was produced by using finite element analysis program in this research. As results of research, formulas of previous strength of connection were available when lateral load acted to gusset plate connected to length direction. However, formulas of previous strength of connection need examination for usability in case lateral load acts to right angle direction or moment and shear force act to length direction to gusset plate connected on steel tube. Thus, it is necessary that developed formulas of strength of connection are presented through tests and research on the strength of connection of 600㎫ steel tube.
마찰진자를 이용한 면진장치의 원전 캐비닛 적용에 관한 연구
최형화(Choi, Hyeong-Hwa),김우범(Kim, Woo-Bum) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
An analytical study was performed to apply the friction pendulum system (FPS) to the cabinet of a nuclear power plant. The cabinet makes with a finite element model. The cabinet to make with the finite element analyzes, and the cabinet knows the characteristic about the natural vibration. A finite element model cabinet is established a friction pendulum system and analyzes. The result of isolator compares with the result of the cabinet not to apply and evaluates.
최형화(Choi, Hyeong-Hwa),김우범(Kim, Woo-Bum) 한국구조물진단유지관리학회 2010 한국구조물진단학회 학술발표회논문집 Vol.2010 No.2
Recently, using of circular hollow section(CHS) is increasing because its structural advantage in long-span structure and high-rise building. However, research of CHS structure is insufficient in spite of widespread use. The behavior of CHS connection is very complex due to local deformation. Especially, in case of CHS-plate connection, to predict the ultimate strength is not simple matter since the load deflection curve does not show consistency. Therefore, in this study, experiments and FEA was carried out to determining the ultimate strength is according to proposed ultimate deformation limit. Finally reasonable ultimate strength formular was proposed through the comparisons with other design guide.
마찰진자를 이용한 면진장치의 원전 캐비닛 적용에 관한 연구
최형화 ( Choi Hyeong-hwa ),김우범 ( Kim Woo-bum ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.2
An analytical study was performed to apply the friction pendulum system (FPS) to the cabinet of a nuclear power plant. The cabinet makes with a finite element model. The cabinet to make with the finite element analyzes, and the cabinet knows the characteristic about the natural vibration. A finite element model cabinet is established a friction pendulum system and analyzes. The result of isolator compares with the result of the cabinet not to apply and evaluates.
거셋플레이트-원형강관 접합부의 극한내력 도출에 관한 연구
김우범,신경재,최형화,Kim, Woo-Bum,Shin, Kyung-Jae,Choi, Hyung-Hwa 한국강구조학회 2011 韓國鋼構造學會 論文集 Vol.23 No.5
최근에 구조물의 대형화와 단면성능의 구조적 장점 때문에 원형강관의 사용이 증가하고 있다. 그러나 원형강관의 사용이 증가함에도 불구하고 국내에서는 이에 대한 연구가 매우 미흡한 실정이다. 원형강관-거셋플레이트 접합부의 극한강도의 판단은 매우 복잡한 국부변형과, 실험 및 유한요소해석 결과의 하중변위곡선 상에서 최대강도가 일관성 있게 나타나지 않기 때문에 간단하지가 않다. 따라서 본 연구에서는 실험과 유한요소해석을 바탕으로 극한변형에 의한 극한내력을 도출하고 기존 접합부 내력식과 비교하여 거셋플레이트-원형강관 접합부에 적합한 내력식을 제안하고자 한다. The demand for the circular hollow section (CHS) has been increasing due to its structural advantage in long-span structures and high-rise buildings. There are not enough researches on the CHS structure, though. The behavior of the gusset plate CHS joint, to predict the ultimate strength, is not easy to predict because the load deflection curve does not show consistency. Therefore, in this study, experiments and finite element analysis (FEA) were carried out to determine the ultimate strength according to the proposed ultimate deformation limit. Finally, a reasonable ultimate strength formula was proposed through comparisons with other design guides.