Abstract
An experimental study on the compressive behavior of steel fiber reinforced concrete-filled steel tube columns is presented. Specimens were tested to investigate the effects of the concrete strength, the thickness of steel tube and the steel fiber volume fraction on the ultimate strength and the ductility. The experimental results indicate that the addition of steel fibers in concrete can significantly improve the ductility and the energy dissipation capacity of the concrete-filled steel tube columns and delay the local buckling of the steel tube, but has no obvious effect on the failure mode. It has also been found that the addition of steel fibers is a more effective method than using thicker steel tube in enhancing the ductility, and more advantageous in the case of higher strength concrete. An analytical model to estimate the load capacity is proposed for steel tube columns filled with both plain concrete and steel fiber reinforced concrete. The predicted results are in good agreement with the experimental ones obtained in this work and literatures.
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Foundation item: Project(51078294) supported by the National Natural Science Foundation of China; Project(201101411100025) supported by the Doctoral Fund of Ministry of Education of China
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Lu, Yy., Li, N., Li, S. et al. Experimental investigation of axially loaded steel fiber reinforced high strength concrete-filled steel tube columns. J. Cent. South Univ. 22, 2287–2296 (2015). https://doi.org/10.1007/s11771-015-2753-x
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DOI: https://doi.org/10.1007/s11771-015-2753-x