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Steel and Composite Structures
  Volume 14, Number 2, February 2013 , pages 173-190

Behavior of circular CFT columns subject to axial force and bending moment
Ji-Hyun Kwak, Hyo-Gyoung Kwak and Jin-Kook Kim

    The major objective of this paper is to evaluate the behavior and ultimate resisting capacity of circular CFT columns. To consider the confinement effect, proper material models with respect to the confinement pressure are selected. A fiber section approach is adopted to simulate the nonlinear stress distribution along the section depth. Material nonlinearity due to the cracking of concrete and the yielding of the surrounding steel tube, as well as geometric nonlinearity due to the P-
Key Words
    circular CFT; confinement effect; ultimate resisting capacity; nonlinear FEM; short column
Ji-Hyun Kwak, Hyo-Gyoung Kwak : Steel Structure Research Division, Research Institute of Industrial Science and Technology, Yeonsu, Incheon 406-840, Korea
Jin-Kook Kim : Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Yuseong, Daejeon 305-701, Korea

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