Interaction between the Local and General Zone for the Post-tensioned Girder Anchorage Zone

Ghassan M. Werdina1, *, Omar Q. Aziz2
1 Department of Water Resources Engineering,, Salahaddin University-Erbil, Erbil, Iraq
2 Department of Civil Engineering, Salahaddin University-Erbil, Erbil, Iraq

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© 2021 Werdina & Aziz.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at Department of Water Resources Engineering, Salahaddin University-Erbil, Erbil, Iraq; Tel: +964 7504381163; E-mail:



The use of post-tensioning in girders causes high bearing and compressive stresses in the anchorage zone. In this study, the behavior of the anchorage zone and the interaction between the local and general zone are investigated. The variables included different reinforcements for both the local and general zones for a block of two anchorage devices.


Both experimental and numerical methods have been applied to study the behavior of the anchorage zone. The experimental part of the study involved laboratory testing of sixteen specimens, and the numerical study was conducted using ABAQUS non-linear finite element analysis.


Tie reinforcement provided additional confinement for the local zone, and this confinement was more for the specimens with originally less confined spiral reinforcement strength. There was a slight or no effect of the local zone reinforcement on the general zone strength and ultimate load of the anchorage zone when the failure was in the general zone.


Confinement of the local zone prevented the brittle bearing and compression failure of this zone.

Keywords: Anchorage zone, Post-tensioning, Local zone, General zone, Spiral reinforcement, ABAQUS.