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Ultimate Moment Capacities of Round Prestressed Concrete Poles

Published online by Cambridge University Press:  05 May 2011

Ine-Wei Liu  and
Jun-Kai Lu
Ine-Wei Liu*
Affiliation:
Department of Civil Engineering, National Pingtung University of Science and Technology, Pingtung, Taiwan 912, R.O.C.
Jun-Kai Lu*
Affiliation:
Department of Civil Engineering, National Pingtung University of Science and Technology, Pingtung, Taiwan 912, R.O.C.
*
*Professor
**Associate Professor
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Abstract

An alternative technique for the determination of ultimate moment capacities of round prestressed concrete poles is presented in this paper. The traditional concrete compression area of poles is determined using the conventional iterative design process, the compatibility and equilibrium approach. Moreover, the area of annulus defined by the neutral axis is multiplied by an area reduction factor. It is possible to use numerical methods to calculate the centroid of the reduced annulus. However, the concrete compression zone and strain variation in the longitudinal reinforcement makes the calculation awkward. This paper addresses the problem from a different perspective. No reference to area reduction factor is required in the course of locating the neutral axis. The results are compared in a very satisfactory manner with that obtained using PCI approach. The purpose is to provide formulations that can be easily computerized and implemented on relevant software for the design of round prestressed concrete poles.

Keywords

Prestressed concrete polesConcrete compression zoneArea reduction factorNeutral axis
Type
Articles
Information
Journal of Mechanics , Volume 16 , Issue 3 , September 2000 , pp. 127 - 132
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2000

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References

REFERENCES

1ASCE task Committee on Updating ASCE Design Guide on Steel Transmission Pole Structures of the Structural Division, Design of Steel Transmission Pole of the Structures. ASCE, New York, N. Y. (1990).Google Scholar
2ASCE Committee on Electrical Transmission Structures of the Committee on Analysis and Design of Structures of the Structural Division. Guidelines for Transmission Line Structures Loading. ASCE, New York, N. Y. (1991).Google Scholar
3PCI Committee on Prestressed Concrete Poles, “Guide for Design of Prestressed Concrete Poles,” PCI J., 28(3), pp. 22–88 (1983).Google Scholar
4PCI Committee on Prestressed Concrete Poles, “Guide for Design of Prestressed Concrete Poles,” PCI J., 42(6), pp. 94–134 (1997).CrossRefGoogle Scholar
5ACI Committee 318, Building Code Requirements for Structural Concrete (ACI 318-95), American Concrete Institute, Farmington Hills, MI (1995).Google Scholar
6Lin, T. Y., Design of Prestressed Concrete Structures, 3rd ed., John Wiley and Sons, Inc., New York, N. Y. (1958).Google Scholar
7Nilson, A. H., Design of Prestressed Concrete Structures, John Wiley and Sons, Inc., New York, N. Y. (1978).Google Scholar
8Tayem, A. and Najmi, A., “Uniaxial Bending of Columns,” J. Struct Engrg., ASCE, 119(4), pp. 1206–1221 (1993).Google Scholar
9Tayem, A. and Najmi, A., “Design of Round Reinforced-Concrete Columns,” J. Struct. Engrg., ASCE, 122(9), pp. 1062–1071 (1996).CrossRefGoogle Scholar