Parametric Study of Reinforced Concrete Column Cross-Section for Strength and Ductility

Abstract:

Several parameters and corresponding performance of reinforced concrete column cross-sections of different shapes (square, rectangular, circular, T-shape, I-shape, cross-shape, L-shape and C-shape) under various loading conditions have been studied in order to determine the suitable and optimum cross-sections for strength and ductility. In each cross-section shape, parameters include compressive strength of concrete (f’c), tensile strength of steel (fy), steel ratio (As/Ag), and angle of bending. In order to demonstrate the behavior and performance of the sections in terms of strength and ductility, CSISectionBuilder software was used to define the stress-strain curve for concrete and steel and then compute the moment-curvature relationship for each section. Considering different sections, the number of parameters in every section and various loading conditions, a total of around 1,800 sections were analyzed. The comparison procedures started within each section shape, and then across different sections in order to determine the most suitable cross-section for strength and ductility. Results of the study are deemed very useful in the system selection and preliminary design of important structures such as buildings with complicated geometry and high architectural demand including bridge piers and hydraulic structures.

• Periodical: Key Engineering Materials (Volumes 400-402)
• Pages: 269-274
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.400-402.269
• Online since: October 2008
• Authors: Naveed Anwar, Mohammad Qaasim
• Keywords: Cross-Section, Ductility, Moment-Curvature Relationship, Strength

References

[1] T. Paulay and M. J. N Priestley: Seismic Design of Reinforced Concrete and Masonry Building, John Wiley and Sons Inc., New York (1992).

[2] Design of Modern Highrise Reinforced Concrete Structures, Vol. 3, edited by H. Aoyama, Imperial College Press (2001).

[3] N. Anwar: Understanding Cross-section, ACECOMS, Asian Institute of Technology, Bangkok Thailand, (2002).

[4] A. I. Karabinis and P.D. Kiousis: Strength and Ductility of Rectangular Concrete Columns a Plasticity Approach, Journal of Structural Engineering, Vol. 122, No 3 (1996).

DOI: 10.1061/(asce)0733-9445(1996)122:3(267)

[5] K. A. S. Susantha, H. Ge and T. Usami: Uniaxial Stress-strain Relationship of Concrete Confined by Various Shaped Steel Tubes, Journal of Engineering Structures, www. elsevier. com (2001).

DOI: 10.1016/s0141-0296(01)00020-7

[6] F. T. K. Au and A. K. H. Kwan: A Minimum Ductility Design Method for �on-Rectangular High Strength Concrete Beams, Journal of Computera and Concrete, Vol. 1, No. 2 (2004).

DOI: 10.12989/cac.2004.1.2.115

[7] S. El-Tawil: Strength and Ductility of Concrete Encased Composite Columns, Journal of Structural Engineering, Vol. 125, No 9, (1999).

DOI: 10.1061/(asce)0733-9445(1999)125:9(1009)

[8] J. B. M. Sousa Jr: Analytical Integration of Cross-section Properties for �umerical Analysis of Reinforced Concrete Steel and Composite Frames, Journal of Structural Engineering (2006).

[9] J. A. Rodriguez and J. D. Ochoa: Biaxial Interation Diagrams for Short RC Columns of Any Cross-section, Journal of Structural Engineering, Vol. 125, No. 6 (1999).

DOI: 10.1061/(asce)0733-9445(1999)125:6(672)

[10] N. E. Shanmugam: Effect of Key Parameters on Strength of In-filled Steel Concrete Composite Columns, Journal of structural Engineering, Vol. 5, No. 2 (2005).

[11] Computers and Structures, Inc., CSI Analysis Reference Manual for CSISectionBuilder, Berkley, California, USA. (2005).