Title:
Post-Tensioned Anchorage Zones -- A Survey and a Solution
Author(s):
David H. Sanders and John E. Breen
Publication:
Concrete International
Volume:
17
Issue:
8
Appears on pages(s):
65-70
Keywords:
anchorage (structural); building codes; failure; post-tensioning; prestressing steels; specifications; standards; Construction
DOI:
Date:
8/1/1995
Abstract:
A critical aspect of post-tensioned concrete construction is the anchorage zone. The concentrated post-tensioning force of the tendons are applied to the structure at the anchorage zone. Catastrophic failures can occur since the highest force applied to the anchorages occurs during the stressing process. Codes and specifications in the United States provide very little guidance and no commonly accepted rational and systematic approach to the design of anchorage zones in post-tensioned concrete members existed. A survey conducted by the ComitT Euro-International du BTton (CEB) asked engineers to design, using their own national code or handbook, a post-tensioned beam. A striking range of responses resulted. The survey made it clear that progress in the design of anchorage zones is not a matter of refining five or ten percent but is at the point of reducing differences that can range from 50 to 500 percent.