Abstract： AS/NZS 1314:2003 pdf download.Prestressing anchorages. 5.2 Safety When concrete in the anchorage zone has been reinforced, cast and cured in accordance with AS 3600 or NZS 3101.1. an anchorage. or a coupling, shall be capable of safely tran...

AS/NZS 1314:2003 pdf download.Prestressing anchorages.

5.2 Safety

When concrete in the anchorage zone has been reinforced, cast and cured in accordance with AS 3600 or NZS 3101.1. an anchorage. or a coupling, shall be capable of safely transferring thc design forces to the concrete, both during the stressing operation and

upon release of the stressing equipment.

5.3 Reliability

An anchorage or a coupling shall be capable of maintaining the design prestressing forces imposed on it throughout the service life of the member.

NOTE: In the design of an anchorage or coupling, account needs to be taken of some practical

considerations including, hut not limited to, the following:

(a) The shape of the assembly, which should maximize load transfer by bearing and should permit ready compaction of the concrete

around it.

(b) Staged tensioning of tendons will cause non-uniform distribution of stresses in multiple- tendon anchorages.

(c) The likelihood of axial misalignment of the tendons relative to their anchorages. The supplier should specify the maximum

deviation.

(d) Appropriate provisions for fixing the anchorage to the formwork and, where tendons are contained in permanent ducting. for

fixing the ducting to the anchorage.

(e) Provision of an entry port for the grouting of post-tensioned tendons.

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