Conclusion
The basic equations of EN 1591

This initial phase of understanding the basic equations of EN 1591, based on document CR 13642, did not reveal any problems fundamentally calling into question EN 1591 as a whole. It showed that most of the problems concerned the consideration of joint behavior:

• modeling choices ;

• inconsistency of coefficients between EN 1591 and the draft test standard Pr EN 13555 ;

• stress homogeneity ;

• definition of a C₁ coefficient for which no value is provided, etc.

A parametric study applied to these coefficients, describing the behavior of the joint, would provide a better understanding of their influence on the calculation results.

On the other hand, the study of document CR 13642 did not shed light on all the stages of reasoning that led to EN 1591. Thus, the transformation of the frustoconical...