Design of Short Reinforced Concrete Columns with the Minimum Possible Reinforcement
DOI:
https://doi.org/10.35778/jazu.i54.a546Keywords:
Short concrete columns, minimum reinforcement ratio, nesting, compressive strength of concreteAbstract
The proportion of longitudinal reinforcement used in reinforced concrete columns is a major factor in their total costs since reinforcing steel is expensive. Under normal circumstances, a small proportion of reinforcing steel should be used and this can be achieved by using larger column sizes and/or higher strength concrete. If the proportion of reinforcing steel is maintained within the range of (1% - 3%), there will be sufficient space to place the bars appropriately in the columns, which facilitates and speeds up the implementation work. In addition, this contributes significantly to eliminating the nesting problems in the columns. In this study, we discuss the possibility of analyzing and designing short reinforced concrete columns using the lowest possible reinforcement ratio according to the limits recommended by the specifications. Increasing the compressive strength of the concrete used is one of the relatively inexpensive solutions compared to the amount of reinforcing steel that will be dispensed with. The results of the study showed that by inexpensively increasing the compressive strength of the concrete used from (28 MPa) to (32 MPa), the amount of reinforcing steel used will decrease significantly and effectively from (12????28) to (8????28).
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References
1- McCormac, J. C., & Brown, R. H. (2015). Design of reinforced concrete. John Wiley & Sons.
2- Umesh K. Sharma, Pradeep Bhargava and S.K. Kaushik. Behavior of Confined High Strength Concrete Columns under Axial Compression. Journal of Advanced Concrete Technology Vol. 3, No. 2, 267-281
3- Sharma, U. K., & Bhargava, P. (2005). Behavior of confined high strength concrete columns under axial compression. Journal of Advanced Concrete Technology, 3(2), 267-281.
4- Campione, G., & Minafò, G. (2010). Compressive behavior of short high-strength concrete columns. Engineering Structures, 32(9), 2755-2766.
5- Choi, S. H., Hwang, J. H., Han, S. J., Cho, H. C., Kim, J. H., & Kim, K. S. (2020). Simplified effective compressive strengths of columns with intervening floor slabs. International Journal of Concrete Structures and Materials, 14(1), 42.
