Title: Direct Minimum Weight Design of Long Span Prestressed Concrete Members
Date: January-February, 1984
Volume: 29
Issue: 1
Page number: 110-127
Author(s): A. S. Prasada Rao
https://doi.org/10.15554/pcij.01011984.110.127

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Abstract

Describes a direct method (with the aid of a computer program) by which a minimum weight section can be obtained for long span prestressed concrete members without resorting to the use of either  iterative techniques or design curves. The cross section derived by this procedure satisfies the transfer and working load permissible stresses at the bottom fiber, the working load permissible stress at the top fiber, and the cover requirements of the center of gravity of the prestressed reinforcement. It is shown that for either the given or assumed  data the area of the section so worked out is the absolute  minimum. Design guidelines are given for obtaining the least weight section of a member and a fully worked design example is also included.