Abstract
This paper investigates the flexural behavior of high strength concrete filled square steel beam with inner CFRP (carbon fiber-reinforced polymer) circular tube by the ABAQUS/Standard solver. In addition, eight specimens were fabricated and tested to investigate the pure flexural behavior. The test data was used to verify the Finite Element Analysis (FEA) modeling and good agreement was achieved in general. Furthermore, the influences of steel yielding strength, concrete strength, steel ratio and the thickness of CFRP on the flexural performance of the specimens were analyzed by FEA. According to the analysis of bending moment versus strain curves, the materials of CFRP, steel and concrete worked well together subjected to pure bending before the CFRP tube ruptured. The results presented in this paper show that these composite beams have a very ductile response because the concrete is confined by the CFRP tube and the steel tube. The beams’ flexural response, including the flexural stiffness and the ultimate load, can be substantially improved by the inner CFRP tube. The parametric studies provide information for the development of formulae to calculate the moment capacity. A comparison of experimental failure loads with the predicted failure loads in accordance with the formulae showed good agreement.
Similar content being viewed by others
References
Li, G.C and Ma, L. (2008). “Bearing capacity of short columns of high strength concrete filled square steel tubular with Inner CFRP circular tubular under axially compressive load.” Journal of Shenyang Jianzhu University (Natural Science), Vol. 24, No. 1, pp. 62–66.
Li, G. C., Lang, Y., and Yang, Z. J. (2011). “Behavior of high strength CFSST stub columns with inner CFRP tube under axial compressive load.” Advanced Steel Construction, Vol. 7, No. 3, pp. 231–246.
Li, G. C., Di, C. Y., Tian, L., and Fang, C. (2013). “Nonlinear finite element analysis on long columns of high-strength concrete-filled square steel tube with inner CFRP circular tube under axial load.” Advanced Steel Construction, Vol. 9, No. 2, pp. 124–138.
Li, G. C. and Yang, Y. (2009). “Experimental study on high-stregth concrete filled square steel tubular beam with inner CFRP circular tube.” Journal of Shenyang Jianzhu University(Natural Science), Vol. 25, No. 6, pp. 1044–1049.
Li, G. C, Yang, Z. J., and Lang, Y. (2010). “Experimental behavior of high strength concrete-filled square steel tube under bi-axial eccentric loading.” Advanced Steel Construction, Vol. 6, No. 4, pp. 963–975.
Li, G. C., Yang, Z. J., Lang, Y., and Fang, C. (2013). “Behavior of high strength concrete filled square steel tube columns with inner CFRP circular tube under bi-axial eccentric loading.” Advanced Steel Construction, Vol. 9, No. 3, pp. 214–229.
Guo, L. H., Zhang, S. M., and Wang, Y. Y. (2002). “Experimental research and theoretical on flexural behavior of high-strength concrete-filled square and rectangular steel tubes.” Steel Construction, Vol. 6, No. 17, pp. 29–33.
Han, L. H. (2004). “Flexural behavior of concrete-filled steel tubes.” Journal of Constructional Steel Research, Vol. 60, pp. 313–337, DOI: 10.1016/j.jcsr.2003.08.009.
Lu, F. W., Li, S. P., Li, D. W., and Sun G. J. (2007). “Flexural behavior of concrete filled non-uni-thickness walled rectangular steel tube.” Journal of Constructional Steel Research, Vol. 63, No. 7, pp. 1051–1057, DOI: 10.1016/j.jcsr.2006.09.006.
Zhou, F. and Young, B. (2005). “Tests of cold-formed stainless steel tubular flexural members.” Thin-Walled Structures, Vol. 43, No. 5, pp. 1325–1337, DOI: 10.1016/j.tws.2005.06.005.
Lu, H., Han, L. H., and Zhao, X. L. (2009). “Analytical behavior of circular concrete-filled thin-walled steel tubes subjected to bending.” Thin-Walled Structures, Vol. 47, No. 12, pp. 346–358, DOI: 10.1016/j.tws.2008.07.004.
Elchalakani, M., Zhao, X. L., and Grzebieta, R. H. (2001). “Concretefilled circular steel tubes subjected to pure bending.” Journal of Constructional Steel Research, Vol. 57, No. 33, pp. 1141–1168.
Chitawadagi, M. V. and Narasimhan, M. C. (2009). “Strength deformation behaviour of circular concrete filled steel tubes subjected to pure bending.” Journal of Constructional Steel Research, Vol. 65, No. 8, pp. 1836–1845, DOI: 10.1016/j.jcsr.2009.04.006.
Yu, T., Wong, Y. L., Teng, J. G., Dong, S. L., and Lam, E. S. (2006). “Flexural behavior of hybrid FRP-concrete-steel double-skin tubular members.” Journal of Composites for Construction, Vol. 10, No. 5, pp. 443–452, DOI: 10.1061/(ASCE)1090-0268(2006)10:5(443).
Rodan, A. and Tarawnab, S. (2003). “Analysis of the flexural behavior of rectangular tubular sections filled with high-strength concrete.” Emirates Journal for Engineering Research, Vol. 8, No. 1, pp. 71–77.
Hu, H.T., Huang, C. S., and Chen, Z. L. (2005). “Finite element analysis of CFT columns subjected to an axial compressive force and bending moment in combination.” Journal of Constructional Steel Research, Vol. 61, No. 12, pp. 1692–1712, DOI: 10.1016/j.jcsr.2005. 05.002.
Fernando, D., Yu, T., Teng, J. G., and Zhao, X. L. (2009). “CFRP strengthening of rectangular steel tubes subjected to end bearing loads: Effect of adhesive properties and finite element modelling.” Thin-Walled Structures, Vol. 47, No. 10, pp. 1020–1028, DOI: 10.1016/j.tws.2008.10.008.
Dai, X. and Lam, D. (2010). “Numerical modelling of the axial compressive behaviour of short concrete-filled elliptical steel columns.” Journal of Constructional Steel Research, Vol. 66, No. 7, pp. 931–942, DOI: 10.1016/j.jcsr.2010.02.003.
Abdel-Rahman, N. and Sivakumaran, K. S. (1997). “Material properties models for analysis of cold-formed steel members.” Journal of Structural Engineering, Vol. 123, No. 9, pp. 1135–1143, DOI: 10.1061/(ASCE)0733-9445(1997)123:9(1135).
Han, L. H., Yao, G. H., and Tao, Z. (2007). “Performance of concretefilled thin-walled steel tubes under pure torsion.” Thin-Walled Structures, Vol. 45, No. 1, pp. 24–36, DOI: 10.1016/j.tws.2007.01.008.
Jiang, J. J., Lu, X. Z., and Ye, L. P. (2005). Finite element analysis of concrete structures, Beijing: Tsinghua University Press.
Roeder, C. W., Cameron, B., and Brown, C. B. (1999). “Composite action in concrete filled tubes.” Journal of Structural Engineering, Vol. 125, No. 5, pp. 477–484, DOI: 10.1061/(ASCE)0733-9445 (1999) 125:5(477).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Yang, Z., Li, G., Lang, Y. et al. Flexural behavior of high strength concrete filled square steel tube with inner CFRP circular tube. KSCE J Civ Eng 21, 2728–2737 (2017). https://doi.org/10.1007/s12205-017-0579-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12205-017-0579-9