1986. Tensioning of tendons: force-elongation relationships. (PDF)

Since the late seventies, the agenda of the Commission on Practical Construction has included a detailed study of issues relating directly to the force–elongation relationship of post-tensioning tendons. After a rather slow start, the topic has been addressed very professionally since Dr. E. Woelfel became Chairman of the Working Group. He invited researchers and engineers with particular experience in this field to join the Group.

This report describes the behaviour of tendons as structural elements, but deals only briefly with the specific problem of the effects of the surface condition of individual tendons. This complex subject is currently being studied in detail by a Working Group within the FIP Commission on Prestressing Steels and Systems.

In my opinion, this document provides an excellent synthesis of the available information. It will certainly help authorities, consultants, contractors, post-tensioning specialists, and others to increase their understanding of the behaviour of tendons during stressing. It should therefore be regarded and used as an important source of information for the planning and execution of all prestressing work.

I wish to express my thanks to the Chairman and Members of the Working Group for having prepared such a comprehensive and useful document.

P. Matt
Chairman
FIP Commission on Practical Construction