Chun, S. C., Park, H. C., Ahn, J. H. and Park, C. L. (1999). “Load carrying capacity and ductility of reinforced concrete columns confined by carbon fiber sheets.” Journal of the Architectural Institute of Korea, AIK, Vol. 15, No. 2, pp. 37-46 (in Korean).

Han, B. S. and Shin, S. W. (2003). “A critical review about confinement of concrete and transverse steel in reinforced concrete columns.” Journal of the Korean Concrete Institute, KCI, Vol. 15, No. 2, pp. 144-150 (in Korean).

Han, T. H., Kim, H. J., Kim, Y. J. and Kang, Y. J. (2006). “Confining effect of an internal steel tube in a circular hollow RC Column.” KSCE Journal of Civil and Environmental Engineering Research A, Vol. 26, No. 4A, pp. 565-575 (in Korean).

Karabinis, A. I. and Kiousis, P. D. (1994). “Effects of confinement on concrete columns: plasticity approach.” Journal of Structural Engineering, ASCE, Vol. 120, No. 9, pp. 2747-2767.

Kim, Y. S., Kim, M. J., Yoon, S. G., Kim, S. W., Lee, J. Y. and Kim, K. H. (2012). “Confinement effect of high-strength spiral reinforcement according to cross sectional shape.” Journal of the Architectural Institute of Korea, AIK, Vol. 28, No. 4, pp. 19-27 (in Korean).

Lee, J. H., Seok, S. G. and Youn, S. G. (2002). “An experimental study on seismic performance of circular tied bridge columns.” KSCE Journal of Civil and Environmental Engineering Research A, Vol. 22, No. 1A, pp. 159-170 (in Korean).

Mander, J. B., Priestley, M. J. and Park, R. (1988). “Theoretical stress-strain model for confined concrete.” Journal of Structural Engineering, ASCE, Vol. 114, No. 8, pp. 1804-1826.

Mohamed, H. M., Afifi, M. Z. and Benmokrane, B. (2014). “Performance evaluation of concrete columns reinforced longitudinally with FRP bars and confined with FRP hoops and spirals under axial load.” Journal of Bridge Engineering, ASCE, Vol. 19, No. 7, 04014020.

Popovics, S. (1973). “A numerical approach to the complete stress-strain curve of concrete.” Cement and Concrete Research, Materials Today, Vol. 3, No. 5, pp. 583-599.

Saatcioglu, M. and Razvi, S. R. (1992). “Strength and ductility of confined concrete.” Journal of Structural Engineering, ASCE, Vol. 118, No. 6, pp. 1590-1607.

Scott, B. D., Park, R and Priestley, M. J. N. (1982). “Stress-strain behavior of concrete confined by overlapping hoops at low and high strain rates.” In Journal Proceedings, ACI, Vol. 79, No. 1, pp. 13-27.

Sheikh, S. A. and Yeh, C. C. (1992). “Analytical moment-curvature relations for tied concrete columns.” Journal of Structural Engineering, ASCE, Vol. 118, No. 2, pp. 529-544.

Shin, S. W. and Han, B. S. (2002). “Confinement effects of high strength reinforced concrete tied columns.” Journal of the Korea Concrete Institute, KCI, Vol. 14, No. 4, pp. 578-588 (in Korean).