Title: Shear Component of Prestress by Equivalent Loads
Date: March-April, 1977
Volume: 22
Issue: 2
Page number: 64-77
Author(s): David Darwin
https://doi.org/10.15554/pcij.03011977.64.77

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Abstract

A design procedure is presented that uses the concept of equivalent loading to obtain the shear component of prestress. The prestressing tendons are replaced by a set of equivalent loads. The resulting  shear diagram includes the effects of both the vertical component of the  prestress and the induced reactions (if any). Several examples are presented to illustrate the method.  The proposed procedure allows the designer to use familiar analysis techniques, reduce the tedium involved in shear design, and  obtain a clear picture of the forces in the concrete.

References

1. ACI Committee 318, "Building Code Requirements for Reinforced Concrete (ACI 318-71)," American Concrete Institute, Detroit, Michigan, 1971, 78 pp.

2. Moorman, R. B. B., "Equivalent Load Method for Analyzing Prestressed Concrete  Structures," ACI Journal, V. 23, No. 5, January 1952, pp. 405-416.

3. Lin, T. Y., "Load Balancing Method  for Design and Analysis of Prestressed Concrete Structures," ACI Journal, V. 60, No. 6, June 1963, pp. 719-742.

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6. Post-Tensioning Manual, Post-Tensioning  Institute, Glenview, Illinois, 1976, 288 pp.

7. Turula, P., and Freyermuth, C. L., "Moment Influence Coefficients for  Continuous Post-Tensioned Structures," PCI JOURNAL, V. 17, No. 1, January- February 1972, pp. 35-57.