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오헌근,김선희,박찬면,최성모,Oh, Heon-Keun,Kim, Sun-Hee,Park, Chan-Myun,Choi, Sung-Mo 한국공간구조학회 2012 한국공간구조학회지 Vol.12 No.4
The concrete-filled tube (CFT) column has the excellent structural performance. But it is difficult to connect with column and beam because of closed section. Its Solution, 2 members of ㄷchennel in which Internal diaphragm is installed were welded beforehand and the method of making Rectangular Steel Tube was proposed. According to upside and downside junction shape, Internal diaphragm suggested as symmetric specimen and asymmetric specimen. The upper and lower diaphragm of the Symmetric specimen used the same horizontal and The upper diaphragm of the Asymmetric specimen used the horizontal plate and the lower diaphragm used the vertically plate. In this research, 4 T-shape column to beam steps connections were tested with cyclic loading experiment in order to evaluate the structural capability of the offered connection. Symmetric specimens be a failure in 0.03rad from beam flange. And Asymmetric specimens be a failure in 0.05rad from column interface. The comparison results of All specimens shown similar to energy absorption capacity in 0.02rad.
2-Seam 냉간성형 각형 CFT 기둥-보 내다이아프램 접합부의 구조성능에 관한 연구
오헌근,김선희,최영환,최성모,Oh, Heon-Keun,Kim, Sun-Hee,Choi, Young-Hwan,Choi, Sung-Mo 한국복합신소재구조학회 2012 복합신소재구조학회논문집 Vol.3 No.4
The construction of a moment connection for a rectangular hollow section (RHS) column and a H-shaped beam is difficult because the RHS is a closed section. When a inner diaphragm is used for such a connection, in general, it is installed after cutting the HSS columns, which results in increased construction work. This paper suggests a new fabrication method to overcome such problems: An inner diaphragm is welded to inside a C-shaped section first, and then a column is fabricated by welding two C-shaped sections. This fabrication method is superior to a classic method in terms of constructibility. An experimental and a numerical study using Ansys 9.0 were performed in order to compare the strength of connections with respect to the presence of concrete, the corner shape of diaphragm, and the axis of loading. The experimental results including initial stiffness and ultimate loads are reported and the analytical results including load transfer mechanism, degree of stress concentration, and strain distribution are also reported.
상하 이형 다이아프램으로 보강된 2심 냉간성형 각형 CFT 기둥-보 접합부의 실험적 연구
오헌근,김선희,최성모,Oh, Heon Keun,Kim, Sun Hee,Choi, Sung Mo 한국강구조학회 2013 韓國鋼構造學會 論文集 Vol.25 No.1
콘크리트 충전강관 기둥은 우수한 구조성능에도 불구하고 폐단면이라는 특성 상 내다이아프램 형태의 접합부 제작이 어려워 시공성에 다소 문제가 있다. 본 연구에서는 이러한 문제를 해결하기 위해 미리 내다이아프램이 설치된 ㄷ형태의 부재 두 개를 용접하여 각형강관을 제작하는 방법을 제안한다. 접합부의 상부 다이아프램은 수평플레이트를, 하부는 수직 플레이트를 사용하였다. 본 연구는 제시된 접합부의 구조적 성능을 평가하기 위해 접합부 상 하부를 6개의 단순인장 실험과 실대 크기인 2개의 T형 기둥-보 접합부에 대해 반복가력 실험을 수행하였다. 단순인장 실험에서의 주요변수는 상부 다이아프램의 형태와 가력방향이며 하부 다이아프램은 수직 플레이트의 두께와 구멍 개수이고, 실대형 접합부의 변수는 가력방향이다. 실험결과 모서리 절삭형태는 큰 영향이 없었으며 강축방향이 약축방향보다 초기강성이 16~24% 높았다. 수직 플레이트의 구멍개수와 두께가 증가함에 따라 최대내력이 각 약 5% 증가하였다. 실대형 T형 접합부의 가력축에 따른 내력 차이는 크지 않았으며 보의 전소성모멘트에 도달할 때까지 안정적인 거동을 나타냈다. The concrete-filled tube column has the excellent structural performance. But it is difficult to connect with column and beam because of closed section. It suggests that pipe should be produced by welding two sides together where two shapes are joined after a channel is pre-welded onto the three sides in order to form an internal diaphragm. The upper diaphragm of the connection used the horizontal plate and the lower diaphragm used the Vertical plate. This research performed 6 monotonic tension experiments describing the connection upside and downside in order to evaluate the structural capability of the offered connection. And the cyclic loading experiment was performed about 2 T-Type column to beam connections. As to the experimental result edge cutting geometry, there was no big effect. An increase in the number of holes of the plate ultimate strength was increased by 5% and The thickness of the plate increases, the maximum strength was increased by 4%. T-Type connections until it reaches the plastic moment showed a stable behavior.
6m 길이 HSB600 고강도 원형강관 기둥의 구조거동에 대한 실험적 연구
이락근(Lee Rak-Geun),남윤선(Nam Yoon-Sun),오헌근(Oh Heon-Keun),김진호(Kim Jin-HO),최성모(Choi Sung-Mo) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
As the demand for high-tension Ultrathick Steel Plate steel increases in order to deal with high axial load and bending moment which are inseparable from skyscrapers along with the explosively increasing demand for skyscrapers in Korea and overseas, the studies on new steel to meet the requirements for high-strength and high-toughness have been carried out to develop HSB600 high-strength steel. In this study, tests were conducted with variables of width-thickness ratio and eccentricity load to find the ultimate moment and the compressive force at the moment in the stub column of circular steel tube using HSB600 high-strength steel. The purpose of this study is to evaluate the performance of HSB600 steel used for the circular tube under central compressive force and 0.5D eccentric axial force