423.10R-16 Guide to Estimating Prestress Losses

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Title: 423.10R-16 Guide to Estimating Prestress Losses

Author(s): Joint ACI-ASCE Committee 423

Publication: Technical Documents

Volume:

Issue:

Appears on pages(s): 64

Keywords: creep; friction; post-tensioning; prestress loss; prestressed concrete; relaxation; shrinkage.

Date: 9/17/2016

Abstract:
This guide is intended for estimation of prestress losses in concrete structures. Methods presented include lump sum, simplified approaches addressing individual source of loss, and additional estimation methods. They address losses in pretensioned and post-tensioned members, including bonded, unbonded, and external tendons. Note that these estimation methods have not been evaluated for relative merits. A discussion of the variability of prestress losses caused by the variability in concrete properties is also presented. Several example problems are included.