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Structural Engineering and Mechanics Volume 56, Number 5, December10 2015 , pages 727-743 DOI: https://doi.org/10.12989/sem.2015.56.5.727 |
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A study on nonlinear analysis and confinement effect of reinforced concrete filled steel tubular column |
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Alifujiang Xiamuxi, Akira Hasegawa and Jiang Yu
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| Abstract | ||
| According to former studies, the mechanical properties of reinforced concrete filled tubular steel (RCFT) columns differed greatly from that of concrete filled steel tubular (CFT) columns because of interaction of inserted reinforcement in RCFT. Employing an experiment-based verification policy, a general FE nonlinear analysis model was developed to analyze the mechanical behavior and failure mechanism of RCFT columns under uniaxial compression. The reasonable stress-strain relationships were suggested for confined concrete, reinforcements and steel tube in the model. The mechanism for shear failure of concrete core was found out in the numerical simulation, and a none-conventional method and equation for evaluating the confinement effect of RCFT were proposed. | ||
| Key Words | ||
| RCFT; CFT; nonlinear analysis; confinement effect; shear failure | ||
| Address | ||
| Alifujiang Xiamuxi and Jiang Yu: College of Architecture and Civil Engineering, Xinjiang University, Urumqi 830047, China Akira Hasegawa: Department of Civil Engineering and Architecture, Hachinohe Institute of Technology, Hachinohe, Japan | ||