Title:
Bond-Slip-Strain Relationship in Transfer Zone of Pretensioned Concrete Elements
Author(s):
Ho Park and Jae-Yeol Cho
Publication:
Structural Journal
Volume:
111
Issue:
3
Appears on pages(s):
503-514
Keywords:
bond-slip relationship; fiber-reinforced polymer; pretensioned concrete; transfer length
DOI:
10.14359/51686567
Date:
5/1/2014
Abstract:
In this paper, a novel bond-slip-strain relationship for a strand in the transfer zone of a pretensioned concrete member is presented. To draw a relationship among the bond stress, strand strain, and slip along the transfer zone, pretensioned, prestressed concrete members were fabricated, and strand strains were measured from electrical resistance steel gauges attached on the strand during prestressing force release. The test variables were the compressive strength of the concrete, the size of the cross section, the cover thickness, the diameter of the strand, the curing method, and the debonded region. Estimates obtained from the proposed model were in good agreement with the test results from other studies, as well as those from this work. Using the advantage of the strain term in the proposed formulation, the applicability of the derived model to fiber-reinforced polymer tendons was also evaluated.