Sectional Depth of Prestressed Concrete Beams with Excess Capacity
Publication: Journal of Structural Engineering
Volume 122, Issue 7
Abstract
In this paper, the requirements for the sectional depth of prestressed concrete beams satisfying the permissible stress limits are examined. An explicit expression for the member depth is derived in terms of three geometric parameters characterizing the cross section. It can be shown that the governing equation for the depth of prestressed concrete beams is a cubic equation consisting of only one real root. For design, an approximate solution is proposed for the beam depth, and the approximate solution is shown to provide good accuracy within the practical range of loadings and span lengths. The solution for sectional depth, however, does not guarantee a feasible section for the member, and a check on adequate cover for the prestressing tendon must be made during design.
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References
1.
Boczkaj, B. K.(1990). “Depth of prestressed concrete beam.”J. Struct. Engrg., ASCE, 116(2), 538–542.
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Building code requirements for reinforced concrete (ACI 318-89) and commentary—ACI 318R-89. (1989). Am. Concrete Inst., Detroit, Mich.
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Guyon, Y. (1953). Prestressed concrete Vol. I. John Wiley & Sons, Inc., New York, N.Y.
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Nilson, A. H. (1978). Design of prestressed concrete . John Wiley & Sons, Inc., New York, N.Y.
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Copyright © 1996 American Society of Civil Engineers.
History
Published online: Jul 1, 1996
Published in print: Jul 1996
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