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Zhao, X.-L., & Grzebieta, R. (2002). Strength and ductility of concrete filled double skin (SHS inner and SHS outer) tubes. Thin-Walled Structures, 40(2), 199-213. doi:10.1016/s0263-8231(01)00060-x
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Tao, Z., Han, L.-H., & Zhao, X.-L. (2004). Behaviour of concrete-filled double skin (CHS inner and CHS outer) steel tubular stub columns and beam-columns. Journal of Constructional Steel Research, 60(8), 1129-1158. doi:10.1016/j.jcsr.2003.11.008
Han, L.-H., Tao, Z., Huang, H., & Zhao, X.-L. (2004). Concrete-filled double skin (SHS outer and CHS inner) steel tubular beam-columns. Thin-Walled Structures, 42(9), 1329-1355. doi:10.1016/j.tws.2004.03.017
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Ibañez, C., Romero, M. L., Espinos, A., Portolés, J. M., & Albero, V. (2017). Ultra-high Strength Concrete on Eccentrically Loaded Slender Circular Concrete-filled Dual Steel Columns. Structures, 12, 64-74. doi:10.1016/j.istruc.2017.07.005
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