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논문 기본 정보

자료유형
학술저널
저자정보
Xu, Tengfei (Department of Bridge Engineering, Southwest Jiaotong University) Xiang, Tianyu (Department of Bridge Engineering, Southwest Jiaotong University) Zhao, Renda (Department of Bridge Engineering, Southwest Jiaotong University) Zhan, Yulin (Department of Bridge Engineering, Southwest Jiaotong University)
저널정보
테크노프레스 Structural engineering and mechanics : An international journal Structural engineering and mechanics : An international journal 제35권 제3호
발행연도
2010.1
수록면
315 - 333 (19page)

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The structural behaviors of circular concrete filled steel tube (CFT) structures are investigated by nonlinear finite element method. An efficient three-dimensional (3D) degenerated beam element is adopted. Based on those previous studies, a modified stress-strain relationship for confined concrete which introduces the influence of eccentricity on confining stress is presented. Updated Lagrange formulation is used to consider the geometrical nonlinearity induced by large deformation effect. The nonlinear behaviors of CFT structures are investigated, and the accuracy of the proposed constitutive model for confined concrete is mainly concerned. The results demonstrate that the confining effect in CFT elements subjected to combining action of axial force and bending moment is far sophisticated than that in axial loaded columns, and an appropriate evaluation about this effect may be important for nonlinear numerical simulation of CFT structures.

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