Title: Design Charts for Proportioning Rectangular Prestressed Concrete Columns
Date: January-February, 1982
Volume: 27
Issue: 1
Page number: 120-143
Author(s): John R. Salmons, Donald G. McLaughlin
https://doi.org/10.15554/pcij.01011982.120.143

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Abstract

A series of nondimensional ultimate load- moment interaction curves for short, rectangular concrete columns with axial prestressing are presented. Several design examples are included to show the application of the design charts. General nondimensional equations are given which are based on  nonlinear approximations for both the concrete and prestressing steel stress-strain curves, linear strains across the cross section, strain compatibility and equilibrium. The steel location is generalized by replacement  of individual strands with a rectangular prestressed steel tube. The series of curves presented are for a steel strength of 270 ksi (1861.7 Nlmm2), concrete strengths of 5, 6, 7, and 8 ksi (34.48, 41.37, 48.26, and 55.16 N/mm 2 ), and geometric parameters corresponding to the more commonly used  columns. In addition, full and partial stressing of the prestressing steel were considered.

References

1. Everard, N, J., and Cohen, E., Ultimate Strength Design of Reinforced Concrete Columns, Interim Report of ACI Committee 340, ACI Publications SP-7.

2. Notes on ACI 318-71 Building Code  Requirements With Design Applications, Portland Cement Association, 1972, Chapter 10, p. 26.

3. Nilson. A. H., Design of Prestressed Concrete, John Wiley and Sons, 1978, Chapter 1I, pp. 389-399.

4. PCI Design Handbook -Precast Prestressed Concrete, 2nd Edition, Prestressed Concrete Institute,  Chicago, Illinois, 1978, Chapter 8, p. 17.

5. McLaughlin, D. G., "Prestressed Concrete Column Design," MS Thesis, Department of Civil Engineering, University of Missouri-Columbia, December 1980.