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Steel and Composite Structures Volume 17, Number 4, October 2014 , pages 517-533 DOI: https://doi.org/10.12989/scs.2014.17.4.517 |
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Experimental study on reinforced concrete filled circular steel tubular columns |
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Wei Hua, Hai-Jun Wang and Akira Hasegawa
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| Abstract | ||
| Experimental results of 39 specimens including concrete columns, RC columns, hollow steel tube columns, concrete filled steel tubular (CFT) columns, and reinforced concrete filled steel tubular (RCFT) columns are presented. Based on the experimental results, the load-carrying capacity, confined effect, ductility, and failure mode of test columns are investigated. The effects of the main factors such as width-thickness ratio (the ratio of external diameter and wall thickness for steel tubes), concrete strength, steel tube with or without rib, and arrangement of reinforcing bars on the mechanical characteristics of columns are discussed as well. The differences between CFT and RCFT are compared. As a result, it is thought that strength, rigidity and ductility of RCFT are improved; especially strength and ductility are improved after the peak of load-displacement curve. | ||
| Key Words | ||
| reinforced concrete filled steel tubular column; compression test; bearing capacity; ductility ratio; strength | ||
| Address | ||
| (1) Wei Hua, Hai-Jun: College of Architectural Engineering, Shenyang University of Technology, No.111, Shenliao West Road, Economic & Technological Development Zone, Shenyang,110870, P.R. China. (2) Akira Hasegawa: Dept. of Environmental and Civil Engineering, Hachinohe University of Technology, 88-1 Ohbiraki, Hachinohe 031-8501, Japan. | ||