Title: Effect of Elastic and Creep Recoveries of Concrete on Loss of Prestresss

Author(s): Amin Ghali, Adam M. Neville, and P. C. Jha

Publication: Journal Proceedings

Volume: 64

Issue: 12

Appears on pages(s): 802-810

Keywords: beams (structural); creep (materials); creep recovery; modulus of elasticity; prestress losses; prestessed concrete; rlaxation; research; shrinkage; steels

DOI: 10.14359/7608

Date: 12/1/1967

Abstract:
An expression for the loss of prestress accounting for the elastic and creep recoveries induced by the relaxation of steel is developed. Experiments verifying this expression for beams with different tendon eccentricities, and stored at two relative humidities are described. The use of this expression leads to a more accurate estimate of the loss in prestress which aims at economy in design.