Improving the Structural Efficiency of Concrete-Filled Steel Tubular (CFST) Members
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Abstract
The concrete-filled steel tube (CFST) members are being applied more and more in the modern structural structures considering the high load carrying capacity, increased ductility, and effective composite behavior of the steel and concrete. The compression strength and the ability to compress the core of the concrete is greatly enhanced by the confinement offered by the steel tube, and the infill of concrete resists the buckling of the steel tube locally, leading to an excellent structural performance. The paper examines the ways of enhancing the structural effectiveness of CFST members through the examination of the impact of the most significant variables, which include cross-sectional geometry, tube thickness of steel, concrete strength, and the ratio of slenderness. Comparative and analytical estimations are also utilized to analyze the effectiveness of different improvement methods in the enhancement of material use and the general performance. It is revealed that the material property and the choice of section structure can substantially increase the load resistance, stiffness, and the energy absorption capacity. Another important point that the study makes is the drawback of the current offerings of the designs, and the requirements of abstracted design methods that would maximize the potential of the composite of CFST members in terms of safe, economical, and sustainable construction.
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References
Chen, Z., Wang, Y., & Uy, B. (2018). Behaviour and design of concrete-filled steel tubular columns under axial compression. Journal of Constructional Steel Research, 147, 199–214. https://doi.org/10.1016/j.jcsr.2018.04.012
Ding, F. X., Yin, G. A., Wang, L. P., & Yu, Z. W. (2017). Mechanical behaviour of circular concrete-filled steel tube columns under axial loading. Thin-Walled Structures, 118, 165–177. https://doi.org/10.1016/j.tws.2017.06.012
Han, L. H., Li, W., & Tao, Z. (2014). Performance of concrete-filled steel tubular columns subjected to axial compression. Engineering Structures, 69, 33–46. https://doi.org/10.1016/j.engstruct.2014.03.005
Han, L. H., & Yang, Y. F. (2015). Concrete-filled steel tube structures: Theory and practice. Advances in Structural Engineering, 18(7), 1101–1125.
Huang, H., Ye, L., & Chen, B. (2019). Axial compressive behavior of square CFST columns with high-strength materials. Journal of Structural Engineering, 145(6), 04019042.
IS 11384. (2020). Code of practice for composite construction in structural steel and concrete. Bureau of Indian Standards, New Delhi.
Lam, D., Gardner, L., & Burdett, M. (2017). Behaviour of concrete-filled steel tubular columns at elevated temperatures. Engineering Structures, 150, 345–357.
Liu, D., & Gho, W. M. (2016). Ultimate capacity of CFST columns subjected to combined loading. Thin-Walled Structures, 103, 223–234.
O’Shea, M. D., & Bridge, R. Q. (2015). Design of circular concrete-filled steel tubes. Journal of Structural Engineering, 141(7), 04014178.
Sakino, K., Nakahara, H., Morino, S., & Nishiyama, I. (2004). Behavior of centrally loaded concrete-filled steel tube columns. Journal of Structural Engineering, 130(2), 180–188.
Shams, M., & Saadeghvaziri, M. A. (2017). State of the art of concrete-filled steel tubular columns. ACI Structural Journal, 114(4), 897–908.
Tao, Z., Han, L. H., & Wang, Z. B. (2016). Experimental behaviour of CFST columns under cyclic loading. Journal of Constructional Steel Research, 122, 212–226.
Uy, B., Tao, Z., & Han, L. H. (2018). Behaviour of composite concrete-filled steel tubular columns subjected to compression and bending. Engineering Structures, 165, 202–215.
Wang, Y. B., Nie, J. G., & Fan, J. S. (2019). Confinement effects in CFST columns with high-strength concrete. Construction and Building Materials, 230, 117041.
Zhang, S., Guo, L., & Li, Z. (2020). Structural efficiency of concrete-filled steel tubular columns with different cross-sectional shapes. Structures, 25, 528–540.